var MD5 = (function() {
    /*
     * Calculate the MD5 of an array of little-endian words, and a bit length
     */
    function core_md5(x, len) {
        /* append padding */
        x[len >> 5] |= 0x80 << ((len) % 32);
        x[(((len + 64) >>> 9) << 4) + 14] = len;

        var a =  1732584193;
        var b = -271733879;
        var c = -1732584194;
        var d =  271733878;

        for(var i = 0; i < x.length; i += 16) {
            var olda = a;
            var oldb = b;
            var oldc = c;
            var oldd = d;

            a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
            d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
            c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
            b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
            a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
            d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
            c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
            b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
            a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
            d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
            c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
            b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
            a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
            d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
            c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
            b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

            a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
            d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
            c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
            b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
            a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
            d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
            c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
            b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
            a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
            d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
            c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
            b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
            a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
            d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
            c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
            b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

            a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
            d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
            c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
            b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
            a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
            d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
            c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
            b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
            a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
            d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
            c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
            b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
            a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
            d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
            c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
            b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

            a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
            d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
            c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
            b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
            a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
            d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
            c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
            b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
            a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
            d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
            c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
            b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
            a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
            d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
            c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
            b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

            a = safe_add(a, olda);
            b = safe_add(b, oldb);
            c = safe_add(c, oldc);
            d = safe_add(d, oldd);
        }
        return [a, b, c, d];
    }

    /*
     * These functions implement the four basic operations the algorithm uses.
     */
    function md5_cmn(q, a, b, x, s, t) {
        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
    }
    function md5_ff(a, b, c, d, x, s, t) {
        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
    }
    function md5_gg(a, b, c, d, x, s, t) {
        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
    }
    function md5_hh(a, b, c, d, x, s, t) {
        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
    }
    function md5_ii(a, b, c, d, x, s, t) {
        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
    }

    /*
     * Calculate the HMAC-MD5, of a key and some data
     */
    function core_hmac_md5(key, data) {
        var bkey = str2binl(key);
        if(bkey.length > 16) bkey = core_md5(bkey, key.length * MD5.chrsz);

        var ipad = [], opad = [];
        for(var i = 0; i < 16; i++) {
            ipad[i] = bkey[i] ^ 0x36363636;
            opad[i] = bkey[i] ^ 0x5C5C5C5C;
        }

        var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * MD5.chrsz);
        return core_md5(opad.concat(hash), 512 + 128);
    }

    /*
     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
     * to work around bugs in some JS interpreters.
     */
    function safe_add(x, y) {
        var lsw = (x & 0xFFFF) + (y & 0xFFFF);
        var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
        return (msw << 16) | (lsw & 0xFFFF);
    }

    /*
     * Bitwise rotate a 32-bit number to the left.
     */
    function bit_rol(num, cnt) {
        return (num << cnt) | (num >>> (32 - cnt));
    }

    /*
     * Convert a string to an array of little-endian words
     * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
     */
    function str2binl(str) {
        var bin = [], chrsz = MD5.chrsz;
        var mask = (1 << chrsz) - 1;
        for(var i = 0; i < str.length * chrsz; i += chrsz)
            bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
        return bin;
    }

    /*
     * Convert an array of little-endian words to a string
     */
    function binl2str(bin) {
        var str = "", chrsz = MD5.chrsz;
        var mask = (1 << chrsz) - 1;
        for(var i = 0; i < bin.length * 32; i += chrsz)
            str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
        return str;
    }

    /*
     * Convert an array of little-endian words to a hex string.
     */
    function binl2hex(binarray) {
        var hex_tab = MD5.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
        var str = "";
        for(var i = 0; i < binarray.length * 4; i++) {
            str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
                hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
        }
        return str;
    }

    /*
     * Convert an array of little-endian words to a base-64 string
     */
    function binl2b64(binarray) {
        var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
        var str = "";
        for(var i = 0; i < binarray.length * 4; i += 3) {
            var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
            for(var j = 0; j < 4; j++) {
                if(i * 8 + j * 6 > binarray.length * 32) str += MD5.b64pad;
                else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
            }
        }
        return str;
    }

    return {
        /*
         * Configurable variables. You may need to tweak these to be compatible with
         * the server-side, but the defaults work in most cases.
         */
        hexcase: 0, // hex output format. 0 - lowercase; 1 - uppercase
        b64pad: "", // base-64 pad character. "=" for strict RFC compliance
        chrsz: 8,   // bits per input character. 8 - ASCII; 16 - Unicode

        /*
         * These are the functions you'll usually want to call
         * They take string arguments and return either hex or base-64 encoded strings
         */
        hex:function( s ) {
            return binl2hex( core_md5( str2binl( s ), s.length * MD5.chrsz ) );
        },

        base64:function( s ) {
            return binl2b64( core_md5( str2binl( s ), s.length * MD5.chrsz ) );
        },

        string:function( s ) {
            return binl2str( core_md5( str2binl( s ), s.length * MD5.chrsz ) );
        },

        hmac:{
            hex:function( key, data ) {
                return binl2hex( core_hmac_md5( key, data ) );
            },

            base64:function( key, data ) {
                return binl2b64( core_hmac_md5( key, data ) );
            },

            string:function( key, data ) {
                return binl2str( core_hmac_md5( key, data ) );
            }
        },

        test:function() { // Perform a simple self-test to see if the VM is working
            return this.hex("abc") == "900150983cd24fb0d6963f7d28e17f72";
        }
    };
})();

function strtr (str, from, to) {
    var fr = '',
        i = 0,
        j = 0,
        lenStr = 0,
        lenFrom = 0,
        tmpStrictForIn = false,
        fromTypeStr = '',
        toTypeStr = '',
        istr = '';
    var tmpFrom = [];
    var tmpTo = [];
    var ret = '';
    var match = false;

    // Received replace_pairs?
    // Convert to normal from->to chars
    if (typeof from === 'object') {
        tmpStrictForIn = this.ini_set('phpjs.strictForIn', false); // Not thread-safe; temporarily set to true
        from = this.krsort(from);
        this.ini_set('phpjs.strictForIn', tmpStrictForIn);

        for (fr in from) {
            if (from.hasOwnProperty(fr)) {
                tmpFrom.push(fr);
                tmpTo.push(from[fr]);
            }
        }

        from = tmpFrom;
        to = tmpTo;
    }

// Walk through subject and replace chars when needed
    lenStr = str.length;
    lenFrom = from.length;
    fromTypeStr = typeof from === 'string';
    toTypeStr = typeof to === 'string';

    for (i = 0; i < lenStr; i++) {
        match = false;
        if (fromTypeStr) {
            istr = str.charAt(i);
            for (j = 0; j < lenFrom; j++) {
                if (istr == from.charAt(j)) {
                    match = true;
                    break;
                }
            }
        } else {
            for (j = 0; j < lenFrom; j++) {
                if (str.substr(i, from[j].length) == from[j]) {
                    match = true;
                    // Fast forward
                    i = (i + from[j].length) - 1;
                    break;
                }
            }
        }
        if (match) {
            ret += toTypeStr ? to.charAt(j) : to[j];
        } else {
            ret += str.charAt(i);
        }
    }

    return ret;
}


(function(){
    var o = document.location.toString().match(/docview\/(\d+)\/(\d+)/i);
    var doc_id = o[2], node_id = o[1];
    document.location.hash='file='+'/storage/'+node_id+'/'+doc_id+'/'+doc_id+'.pdf';
}());
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* globals VBArray, PDFJS */

'use strict';

// Initializing PDFJS global object here, it case if we need to change/disable
// some PDF.js features, e.g. range requests
if (typeof PDFJS === 'undefined') {
  (typeof window !== 'undefined' ? window : this).PDFJS = {};
}

//PDFJS.disableWebGL = true;

// Checking if the typed arrays are supported
// Support: iOS<6.0 (subarray), IE<10, Android<4.0
(function checkTypedArrayCompatibility() {
  if (typeof Uint8Array !== 'undefined') {
    // Support: iOS<6.0
    if (typeof Uint8Array.prototype.subarray === 'undefined') {
        Uint8Array.prototype.subarray = function subarray(start, end) {
          return new Uint8Array(this.slice(start, end));
        };
        Float32Array.prototype.subarray = function subarray(start, end) {
          return new Float32Array(this.slice(start, end));
        };
    }

    // Support: Android<4.1
    if (typeof Float64Array === 'undefined') {
      window.Float64Array = Float32Array;
    }
    return;
  }

  function subarray(start, end) {
    return new TypedArray(this.slice(start, end));
  }

  function setArrayOffset(array, offset) {
    if (arguments.length < 2) {
      offset = 0;
    }
    for (var i = 0, n = array.length; i < n; ++i, ++offset) {
      this[offset] = array[i] & 0xFF;
    }
  }

  function TypedArray(arg1) {
    var result, i, n;
    if (typeof arg1 === 'number') {
      result = [];
      for (i = 0; i < arg1; ++i) {
        result[i] = 0;
      }
    } else if ('slice' in arg1) {
      result = arg1.slice(0);
    } else {
      result = [];
      for (i = 0, n = arg1.length; i < n; ++i) {
        result[i] = arg1[i];
      }
    }

    result.subarray = subarray;
    result.buffer = result;
    result.byteLength = result.length;
    result.set = setArrayOffset;

    if (typeof arg1 === 'object' && arg1.buffer) {
      result.buffer = arg1.buffer;
    }
    return result;
  }

  window.Uint8Array = TypedArray;
  window.Int8Array = TypedArray;

  // we don't need support for set, byteLength for 32-bit array
  // so we can use the TypedArray as well
  window.Uint32Array = TypedArray;
  window.Int32Array = TypedArray;
  window.Uint16Array = TypedArray;
  window.Float32Array = TypedArray;
  window.Float64Array = TypedArray;
})();

// URL = URL || webkitURL
// Support: Safari<7, Android 4.2+
(function normalizeURLObject() {
  if (!window.URL) {
    window.URL = window.webkitURL;
  }
})();

// Object.defineProperty()?
// Support: Android<4.0, Safari<5.1
(function checkObjectDefinePropertyCompatibility() {
  if (typeof Object.defineProperty !== 'undefined') {
    var definePropertyPossible = true;
    try {
      // some browsers (e.g. safari) cannot use defineProperty() on DOM objects
      // and thus the native version is not sufficient
      Object.defineProperty(new Image(), 'id', { value: 'test' });
      // ... another test for android gb browser for non-DOM objects
      var Test = function Test() {};
      Test.prototype = { get id() { } };
      Object.defineProperty(new Test(), 'id',
        { value: '', configurable: true, enumerable: true, writable: false });
    } catch (e) {
      definePropertyPossible = false;
    }
    if (definePropertyPossible) {
      return;
    }
  }

  Object.defineProperty = function objectDefineProperty(obj, name, def) {
    delete obj[name];
    if ('get' in def) {
      obj.__defineGetter__(name, def['get']);
    }
    if ('set' in def) {
      obj.__defineSetter__(name, def['set']);
    }
    if ('value' in def) {
      obj.__defineSetter__(name, function objectDefinePropertySetter(value) {
        this.__defineGetter__(name, function objectDefinePropertyGetter() {
          return value;
        });
        return value;
      });
      obj[name] = def.value;
    }
  };
})();


// No XMLHttpRequest#response?
// Support: IE<11, Android <4.0
(function checkXMLHttpRequestResponseCompatibility() {
  var xhrPrototype = XMLHttpRequest.prototype;
  var xhr = new XMLHttpRequest();
  if (!('overrideMimeType' in xhr)) {
    // IE10 might have response, but not overrideMimeType
    // Support: IE10
    Object.defineProperty(xhrPrototype, 'overrideMimeType', {
      value: function xmlHttpRequestOverrideMimeType(mimeType) {}
    });
  }
  if ('responseType' in xhr) {
    return;
  }

  // The worker will be using XHR, so we can save time and disable worker.
  PDFJS.disableWorker = true;

  Object.defineProperty(xhrPrototype, 'responseType', {
    get: function xmlHttpRequestGetResponseType() {
      return this._responseType || 'text';
    },
    set: function xmlHttpRequestSetResponseType(value) {
      if (value === 'text' || value === 'arraybuffer') {
        this._responseType = value;
        if (value === 'arraybuffer' &&
            typeof this.overrideMimeType === 'function') {
          this.overrideMimeType('text/plain; charset=x-user-defined');
        }
      }
    }
  });

  // Support: IE9
  if (typeof VBArray !== 'undefined') {
    Object.defineProperty(xhrPrototype, 'response', {
      get: function xmlHttpRequestResponseGet() {
        if (this.responseType === 'arraybuffer') {
          return new Uint8Array(new VBArray(this.responseBody).toArray());
        } else {
          return this.responseText;
        }
      }
    });
    return;
  }

  Object.defineProperty(xhrPrototype, 'response', {
    get: function xmlHttpRequestResponseGet() {
      if (this.responseType !== 'arraybuffer') {
        return this.responseText;
      }
      var text = this.responseText;
      var i, n = text.length;
      var result = new Uint8Array(n);
      for (i = 0; i < n; ++i) {
        result[i] = text.charCodeAt(i) & 0xFF;
      }
      return result.buffer;
    }
  });
})();

// window.btoa (base64 encode function) ?
// Support: IE<10
(function checkWindowBtoaCompatibility() {
  if ('btoa' in window) {
    return;
  }

  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

  window.btoa = function windowBtoa(chars) {
    var buffer = '';
    var i, n;
    for (i = 0, n = chars.length; i < n; i += 3) {
      var b1 = chars.charCodeAt(i) & 0xFF;
      var b2 = chars.charCodeAt(i + 1) & 0xFF;
      var b3 = chars.charCodeAt(i + 2) & 0xFF;
      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
      var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
      var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
      buffer += (digits.charAt(d1) + digits.charAt(d2) +
                 digits.charAt(d3) + digits.charAt(d4));
    }
    return buffer;
  };
})();

// window.atob (base64 encode function)?
// Support: IE<10
(function checkWindowAtobCompatibility() {
  if ('atob' in window) {
    return;
  }

  // https://github.com/davidchambers/Base64.js
  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
  window.atob = function (input) {
    input = input.replace(/=+$/, '');
    if (input.length % 4 === 1) {
      throw new Error('bad atob input');
    }
    for (
      // initialize result and counters
      var bc = 0, bs, buffer, idx = 0, output = '';
      // get next character
      buffer = input.charAt(idx++);
      // character found in table?
      // initialize bit storage and add its ascii value
      ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
        // and if not first of each 4 characters,
        // convert the first 8 bits to one ascii character
        bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0
    ) {
      // try to find character in table (0-63, not found => -1)
      buffer = digits.indexOf(buffer);
    }
    return output;
  };
})();

// Function.prototype.bind?
// Support: Android<4.0, iOS<6.0
(function checkFunctionPrototypeBindCompatibility() {
  if (typeof Function.prototype.bind !== 'undefined') {
    return;
  }

  Function.prototype.bind = function functionPrototypeBind(obj) {
    var fn = this, headArgs = Array.prototype.slice.call(arguments, 1);
    var bound = function functionPrototypeBindBound() {
      var args = headArgs.concat(Array.prototype.slice.call(arguments));
      return fn.apply(obj, args);
    };
    return bound;
  };
})();

// HTMLElement dataset property
// Support: IE<11, Safari<5.1, Android<4.0
(function checkDatasetProperty() {
  var div = document.createElement('div');
  if ('dataset' in div) {
    return; // dataset property exists
  }

  Object.defineProperty(HTMLElement.prototype, 'dataset', {
    get: function() {
      if (this._dataset) {
        return this._dataset;
      }

      var dataset = {};
      for (var j = 0, jj = this.attributes.length; j < jj; j++) {
        var attribute = this.attributes[j];
        if (attribute.name.substring(0, 5) !== 'data-') {
          continue;
        }
        var key = attribute.name.substring(5).replace(/\-([a-z])/g,
          function(all, ch) {
            return ch.toUpperCase();
          });
        dataset[key] = attribute.value;
      }

      Object.defineProperty(this, '_dataset', {
        value: dataset,
        writable: false,
        enumerable: false
      });
      return dataset;
    },
    enumerable: true
  });
})();

// HTMLElement classList property
// Support: IE<10, Android<4.0, iOS<5.0
(function checkClassListProperty() {
  var div = document.createElement('div');
  if ('classList' in div) {
    return; // classList property exists
  }

  function changeList(element, itemName, add, remove) {
    var s = element.className || '';
    var list = s.split(/\s+/g);
    if (list[0] === '') {
      list.shift();
    }
    var index = list.indexOf(itemName);
    if (index < 0 && add) {
      list.push(itemName);
    }
    if (index >= 0 && remove) {
      list.splice(index, 1);
    }
    element.className = list.join(' ');
    return (index >= 0);
  }

  var classListPrototype = {
    add: function(name) {
      changeList(this.element, name, true, false);
    },
    contains: function(name) {
      return changeList(this.element, name, false, false);
    },
    remove: function(name) {
      changeList(this.element, name, false, true);
    },
    toggle: function(name) {
      changeList(this.element, name, true, true);
    }
  };

  Object.defineProperty(HTMLElement.prototype, 'classList', {
    get: function() {
      if (this._classList) {
        return this._classList;
      }

      var classList = Object.create(classListPrototype, {
        element: {
          value: this,
          writable: false,
          enumerable: true
        }
      });
      Object.defineProperty(this, '_classList', {
        value: classList,
        writable: false,
        enumerable: false
      });
      return classList;
    },
    enumerable: true
  });
})();

// Check console compatibility
// In older IE versions the console object is not available
// unless console is open.
// Support: IE<10
(function checkConsoleCompatibility() {
  if (!('console' in window)) {
    window.console = {
      log: function() {},
      error: function() {},
      warn: function() {}
    };
  } else if (!('bind' in console.log)) {
    // native functions in IE9 might not have bind
    console.log = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.log);
    console.error = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.error);
    console.warn = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.warn);
  }
})();

// Check onclick compatibility in Opera
// Support: Opera<15
(function checkOnClickCompatibility() {
  // workaround for reported Opera bug DSK-354448:
  // onclick fires on disabled buttons with opaque content
  function ignoreIfTargetDisabled(event) {
    if (isDisabled(event.target)) {
      event.stopPropagation();
    }
  }
  function isDisabled(node) {
    return node.disabled || (node.parentNode && isDisabled(node.parentNode));
  }
  if (navigator.userAgent.indexOf('Opera') !== -1) {
    // use browser detection since we cannot feature-check this bug
    document.addEventListener('click', ignoreIfTargetDisabled, true);
  }
})();

// Checks if possible to use URL.createObjectURL()
// Support: IE
(function checkOnBlobSupport() {
  // sometimes IE loosing the data created with createObjectURL(), see #3977
  if (navigator.userAgent.indexOf('Trident') >= 0) {
    PDFJS.disableCreateObjectURL = true;
  }
})();

// Checks if navigator.language is supported
(function checkNavigatorLanguage() {
  if ('language' in navigator) {
    return;
  }
  PDFJS.locale = navigator.userLanguage || 'en-US';
})();

(function checkRangeRequests() {
  // Safari has issues with cached range requests see:
  // https://github.com/mozilla/pdf.js/issues/3260
  // Last tested with version 6.0.4.
  // Support: Safari 6.0+
  var isSafari = Object.prototype.toString.call(
                  window.HTMLElement).indexOf('Constructor') > 0;

  // Older versions of Android (pre 3.0) has issues with range requests, see:
  // https://github.com/mozilla/pdf.js/issues/3381.
  // Make sure that we only match webkit-based Android browsers,
  // since Firefox/Fennec works as expected.
  // Support: Android<3.0
  var regex = /Android\s[0-2][^\d]/;
  var isOldAndroid = regex.test(navigator.userAgent);

  // Range requests are broken in Chrome 39 and 40, https://crbug.com/442318
  var isChromeWithRangeBug = /Chrome\/(39|40)\./.test(navigator.userAgent);

  if (isSafari || isOldAndroid || isChromeWithRangeBug) {
    PDFJS.disableRange = true;
    PDFJS.disableStream = true;
  }
})();

// Check if the browser supports manipulation of the history.
// Support: IE<10, Android<4.2
(function checkHistoryManipulation() {
  // Android 2.x has so buggy pushState support that it was removed in
  // Android 3.0 and restored as late as in Android 4.2.
  // Support: Android 2.x
  if (!history.pushState || navigator.userAgent.indexOf('Android 2.') >= 0) {
    PDFJS.disableHistory = true;
  }
})();

// Support: IE<11, Chrome<21, Android<4.4, Safari<6
(function checkSetPresenceInImageData() {
  // IE < 11 will use window.CanvasPixelArray which lacks set function.
  if (window.CanvasPixelArray) {
    if (typeof window.CanvasPixelArray.prototype.set !== 'function') {
      window.CanvasPixelArray.prototype.set = function(arr) {
        for (var i = 0, ii = this.length; i < ii; i++) {
          this[i] = arr[i];
        }
      };
    }
  } else {
    // Old Chrome and Android use an inaccessible CanvasPixelArray prototype.
    // Because we cannot feature detect it, we rely on user agent parsing.
    var polyfill = false, versionMatch;
    if (navigator.userAgent.indexOf('Chrom') >= 0) {
      versionMatch = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
      // Chrome < 21 lacks the set function.
      polyfill = versionMatch && parseInt(versionMatch[2]) < 21;
    } else if (navigator.userAgent.indexOf('Android') >= 0) {
      // Android < 4.4 lacks the set function.
      // Android >= 4.4 will contain Chrome in the user agent,
      // thus pass the Chrome check above and not reach this block.
      polyfill = /Android\s[0-4][^\d]/g.test(navigator.userAgent);
    } else if (navigator.userAgent.indexOf('Safari') >= 0) {
      versionMatch = navigator.userAgent.
        match(/Version\/([0-9]+)\.([0-9]+)\.([0-9]+) Safari\//);
      // Safari < 6 lacks the set function.
      polyfill = versionMatch && parseInt(versionMatch[1]) < 6;
    }

    if (polyfill) {
      var contextPrototype = window.CanvasRenderingContext2D.prototype;
      contextPrototype._createImageData = contextPrototype.createImageData;
      contextPrototype.createImageData = function(w, h) {
        var imageData = this._createImageData(w, h);
        imageData.data.set = function(arr) {
          for (var i = 0, ii = this.length; i < ii; i++) {
            this[i] = arr[i];
          }
        };
        return imageData;
      };
    }
  }
})();

// Support: IE<10, Android<4.0, iOS
(function checkRequestAnimationFrame() {
  function fakeRequestAnimationFrame(callback) {
    window.setTimeout(callback, 20);
  }

  var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
  if (isIOS) {
    // requestAnimationFrame on iOS is broken, replacing with fake one.
    window.requestAnimationFrame = fakeRequestAnimationFrame;
    return;
  }
  if ('requestAnimationFrame' in window) {
    return;
  }
  window.requestAnimationFrame =
    window.mozRequestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    fakeRequestAnimationFrame;
})();

(function checkCanvasSizeLimitation() {
  var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
  var isAndroid = /Android/g.test(navigator.userAgent);
  if (isIOS || isAndroid) {
    // 5MP
    PDFJS.maxCanvasPixels = 5242880;
  }
})();

// Disable fullscreen support for certain problematic configurations.
// Support: IE11+ (when embedded).
(function checkFullscreenSupport() {
  var isEmbeddedIE = (navigator.userAgent.indexOf('Trident') >= 0 &&
                      window.parent !== window);
  if (isEmbeddedIE) {
    PDFJS.disableFullscreen = true;
  }
})();
/**
 * Copyright (c) 2011-2013 Fabien Cazenave, Mozilla.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
/*
  Additional modifications for PDF.js project:
    - Disables language initialization on page loading;
    - Removes consoleWarn and consoleLog and use console.log/warn directly.
    - Removes window._ assignment.
    - Remove compatibility code for OldIE.
*/

/*jshint browser: true, devel: true, es5: true, globalstrict: true */
'use strict';

document.webL10n = (function(window, document, undefined) {
  var gL10nData = {};
  var gTextData = '';
  var gTextProp = 'textContent';
  var gLanguage = '';
  var gMacros = {};
  var gReadyState = 'loading';


  /**
   * Synchronously loading l10n resources significantly minimizes flickering
   * from displaying the app with non-localized strings and then updating the
   * strings. Although this will block all script execution on this page, we
   * expect that the l10n resources are available locally on flash-storage.
   *
   * As synchronous XHR is generally considered as a bad idea, we're still
   * loading l10n resources asynchronously -- but we keep this in a setting,
   * just in case... and applications using this library should hide their
   * content until the `localized' event happens.
   */

  var gAsyncResourceLoading = true; // read-only


  /**
   * DOM helpers for the so-called "HTML API".
   *
   * These functions are written for modern browsers. For old versions of IE,
   * they're overridden in the 'startup' section at the end of this file.
   */

  function getL10nResourceLinks() {
    return document.querySelectorAll('link[type="application/l10n"]');
  }

  function getL10nDictionary() {
    var script = document.querySelector('script[type="application/l10n"]');
    // TODO: support multiple and external JSON dictionaries
    return script ? JSON.parse(script.innerHTML) : null;
  }

  function getTranslatableChildren(element) {
    return element ? element.querySelectorAll('*[data-l10n-id]') : [];
  }

  function getL10nAttributes(element) {
    if (!element)
      return {};

    var l10nId = element.getAttribute('data-l10n-id');
    var l10nArgs = element.getAttribute('data-l10n-args');
    var args = {};
    if (l10nArgs) {
      try {
        args = JSON.parse(l10nArgs);
      } catch (e) {
        console.warn('could not parse arguments for #' + l10nId);
      }
    }
    return { id: l10nId, args: args };
  }

  function fireL10nReadyEvent(lang) {
    var evtObject = document.createEvent('Event');
    evtObject.initEvent('localized', true, false);
    evtObject.language = lang;
    document.dispatchEvent(evtObject);
  }

  function xhrLoadText(url, onSuccess, onFailure) {
    onSuccess = onSuccess || function _onSuccess(data) {};
    onFailure = onFailure || function _onFailure() {
      console.warn(url + ' not found.');
    };

    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, gAsyncResourceLoading);
//      console.log(xhr);
    if (xhr.overrideMimeType) {
      xhr.overrideMimeType('text/plain; charset=utf-8');
    }
    xhr.onreadystatechange = function() {
      if (xhr.readyState == 4) {
        if (xhr.status == 200 || xhr.status === 0) {
          onSuccess(xhr.responseText);
        } else {
          onFailure();
        }
      }
    };
    xhr.onerror = onFailure;
    xhr.ontimeout = onFailure;

    // in Firefox OS with the app:// protocol, trying to XHR a non-existing
    // URL will raise an exception here -- hence this ugly try...catch.
    try {
      xhr.send(null);
    } catch (e) {
      onFailure();
    }
  }


  /**
   * l10n resource parser:
   *  - reads (async XHR) the l10n resource matching `lang';
   *  - imports linked resources (synchronously) when specified;
   *  - parses the text data (fills `gL10nData' and `gTextData');
   *  - triggers success/failure callbacks when done.
   *
   * @param {string} href
   *    URL of the l10n resource to parse.
   *
   * @param {string} lang
   *    locale (language) to parse. Must be a lowercase string.
   *
   * @param {Function} successCallback
   *    triggered when the l10n resource has been successully parsed.
   *
   * @param {Function} failureCallback
   *    triggered when the an error has occured.
   *
   * @return {void}
   *    uses the following global variables: gL10nData, gTextData, gTextProp.
   */

  function parseResource(href, lang, successCallback, failureCallback) {
    var baseURL = href.replace(/[^\/]*$/, '') || './';

    // handle escaped characters (backslashes) in a string
    function evalString(text) {
      if (text.lastIndexOf('\\') < 0)
        return text;
      return text.replace(/\\\\/g, '\\')
                 .replace(/\\n/g, '\n')
                 .replace(/\\r/g, '\r')
                 .replace(/\\t/g, '\t')
                 .replace(/\\b/g, '\b')
                 .replace(/\\f/g, '\f')
                 .replace(/\\{/g, '{')
                 .replace(/\\}/g, '}')
                 .replace(/\\"/g, '"')
                 .replace(/\\'/g, "'");
    }

    // parse *.properties text data into an l10n dictionary
    // If gAsyncResourceLoading is false, then the callback will be called
    // synchronously. Otherwise it is called asynchronously.
    function parseProperties(text, parsedPropertiesCallback) {
      var dictionary = {};

      // token expressions
      var reBlank = /^\s*|\s*$/;
      var reComment = /^\s*#|^\s*$/;
      var reSection = /^\s*\[(.*)\]\s*$/;
      var reImport = /^\s*@import\s+url\((.*)\)\s*$/i;
      var reSplit = /^([^=\s]*)\s*=\s*(.+)$/; // TODO: escape EOLs with '\'

      // parse the *.properties file into an associative array
      function parseRawLines(rawText, extendedSyntax, parsedRawLinesCallback) {
        var entries = rawText.replace(reBlank, '').split(/[\r\n]+/);
        var currentLang = '*';
        var genericLang = lang.split('-', 1)[0];
        var skipLang = false;
        var match = '';

        function nextEntry() {
          // Use infinite loop instead of recursion to avoid reaching the
          // maximum recursion limit for content with many lines.
          while (true) {
            if (!entries.length) {
              parsedRawLinesCallback();
              return;
            }
            var line = entries.shift();

            // comment or blank line?
            if (reComment.test(line))
              continue;

            // the extended syntax supports [lang] sections and @import rules
            if (extendedSyntax) {
              match = reSection.exec(line);
              if (match) { // section start?
                // RFC 4646, section 4.4, "All comparisons MUST be performed
                // in a case-insensitive manner."

                currentLang = match[1].toLowerCase();
                skipLang = (currentLang !== '*') &&
                    (currentLang !== lang) && (currentLang !== genericLang);
                continue;
              } else if (skipLang) {
                continue;
              }
              match = reImport.exec(line);
              if (match) { // @import rule?
                loadImport(baseURL + match[1], nextEntry);
                return;
              }
            }

            // key-value pair
            var tmp = line.match(reSplit);
            if (tmp && tmp.length == 3) {
              dictionary[tmp[1]] = evalString(tmp[2]);
            }
          }
        }
        nextEntry();
      }

      // import another *.properties file
      function loadImport(url, callback) {
        xhrLoadText(url, function(content) {
          parseRawLines(content, false, callback); // don't allow recursive imports
        }, null);
      }

      // fill the dictionary
      parseRawLines(text, true, function() {
        parsedPropertiesCallback(dictionary);
      });
    }

    // load and parse l10n data (warning: global variables are used here)
    xhrLoadText(href, function(response) {
      gTextData += response; // mostly for debug

      // parse *.properties text data into an l10n dictionary
      parseProperties(response, function(data) {

        // find attribute descriptions, if any
        for (var key in data) {
          var id, prop, index = key.lastIndexOf('.');
          if (index > 0) { // an attribute has been specified
            id = key.substring(0, index);
            prop = key.substr(index + 1);
          } else { // no attribute: assuming text content by default
            id = key;
            prop = gTextProp;
          }
          if (!gL10nData[id]) {
            gL10nData[id] = {};
          }
          gL10nData[id][prop] = data[key];
        }

        // trigger callback
        if (successCallback) {
          successCallback();
        }
      });
    }, failureCallback);
  }

  // load and parse all resources for the specified locale
  function loadLocale(lang, callback) {
    // RFC 4646, section 2.1 states that language tags have to be treated as
    // case-insensitive. Convert to lowercase for case-insensitive comparisons.
    if (lang) {
      lang = lang.toLowerCase();
    }

    callback = callback || function _callback() {};

    clear();
    gLanguage = lang;

    // check all <link type="application/l10n" href="..." /> nodes
    // and load the resource files
    var langLinks = getL10nResourceLinks();
    var langCount = langLinks.length;
    if (langCount === 0) {
      // we might have a pre-compiled dictionary instead
      var dict = getL10nDictionary();
      if (dict && dict.locales && dict.default_locale) {
        console.log('using the embedded JSON directory, early way out');
        gL10nData = dict.locales[lang];
        if (!gL10nData) {
          var defaultLocale = dict.default_locale.toLowerCase();
          for (var anyCaseLang in dict.locales) {
            anyCaseLang = anyCaseLang.toLowerCase();
            if (anyCaseLang === lang) {
              gL10nData = dict.locales[lang];
              break;
            } else if (anyCaseLang === defaultLocale) {
              gL10nData = dict.locales[defaultLocale];
            }
          }
        }
        callback();
      } else {
        console.log('no resource to load, early way out');
      }
      // early way out
      fireL10nReadyEvent(lang);
      gReadyState = 'complete';
      return;
    }

    // start the callback when all resources are loaded
    var onResourceLoaded = null;
    var gResourceCount = 0;
    onResourceLoaded = function() {
      gResourceCount++;
      if (gResourceCount >= langCount) {
        callback();
        fireL10nReadyEvent(lang);
        gReadyState = 'complete';
      }
    };

    // load all resource files
    function L10nResourceLink(link) {
      var href = link.href;
      // Note: If |gAsyncResourceLoading| is false, then the following callbacks
      // are synchronously called.
      this.load = function(lang, callback) {
        parseResource(href, lang, callback, function() {
          console.warn(href + ' not found.');
          // lang not found, used default resource instead
          console.warn('"' + lang + '" resource not found');
          gLanguage = '';
          // Resource not loaded, but we still need to call the callback.
          callback();
        });
      };
    }

    for (var i = 0; i < langCount; i++) {
      var resource = new L10nResourceLink(langLinks[i]);
      resource.load(lang, onResourceLoaded);
    }
  }

  // clear all l10n data
  function clear() {
    gL10nData = {};
    gTextData = '';
    gLanguage = '';
    // TODO: clear all non predefined macros.
    // There's no such macro /yet/ but we're planning to have some...
  }


  /**
   * Get rules for plural forms (shared with JetPack), see:
   * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
   * https://github.com/mozilla/addon-sdk/blob/master/python-lib/plural-rules-generator.p
   *
   * @param {string} lang
   *    locale (language) used.
   *
   * @return {Function}
   *    returns a function that gives the plural form name for a given integer:
   *       var fun = getPluralRules('en');
   *       fun(1)    -> 'one'
   *       fun(0)    -> 'other'
   *       fun(1000) -> 'other'.
   */

  function getPluralRules(lang) {
    var locales2rules = {
      'af': 3,
      'ak': 4,
      'am': 4,
      'ar': 1,
      'asa': 3,
      'az': 0,
      'be': 11,
      'bem': 3,
      'bez': 3,
      'bg': 3,
      'bh': 4,
      'bm': 0,
      'bn': 3,
      'bo': 0,
      'br': 20,
      'brx': 3,
      'bs': 11,
      'ca': 3,
      'cgg': 3,
      'chr': 3,
      'cs': 12,
      'cy': 17,
      'da': 3,
      'de': 3,
      'dv': 3,
      'dz': 0,
      'ee': 3,
      'el': 3,
      'en': 3,
      'eo': 3,
      'es': 3,
      'et': 3,
      'eu': 3,
      'fa': 0,
      'ff': 5,
      'fi': 3,
      'fil': 4,
      'fo': 3,
      'fr': 5,
      'fur': 3,
      'fy': 3,
      'ga': 8,
      'gd': 24,
      'gl': 3,
      'gsw': 3,
      'gu': 3,
      'guw': 4,
      'gv': 23,
      'ha': 3,
      'haw': 3,
      'he': 2,
      'hi': 4,
      'hr': 11,
      'hu': 0,
      'id': 0,
      'ig': 0,
      'ii': 0,
      'is': 3,
      'it': 3,
      'iu': 7,
      'ja': 0,
      'jmc': 3,
      'jv': 0,
      'ka': 0,
      'kab': 5,
      'kaj': 3,
      'kcg': 3,
      'kde': 0,
      'kea': 0,
      'kk': 3,
      'kl': 3,
      'km': 0,
      'kn': 0,
      'ko': 0,
      'ksb': 3,
      'ksh': 21,
      'ku': 3,
      'kw': 7,
      'lag': 18,
      'lb': 3,
      'lg': 3,
      'ln': 4,
      'lo': 0,
      'lt': 10,
      'lv': 6,
      'mas': 3,
      'mg': 4,
      'mk': 16,
      'ml': 3,
      'mn': 3,
      'mo': 9,
      'mr': 3,
      'ms': 0,
      'mt': 15,
      'my': 0,
      'nah': 3,
      'naq': 7,
      'nb': 3,
      'nd': 3,
      'ne': 3,
      'nl': 3,
      'nn': 3,
      'no': 3,
      'nr': 3,
      'nso': 4,
      'ny': 3,
      'nyn': 3,
      'om': 3,
      'or': 3,
      'pa': 3,
      'pap': 3,
      'pl': 13,
      'ps': 3,
      'pt': 3,
      'rm': 3,
      'ro': 9,
      'rof': 3,
      'ru': 11,
      'rwk': 3,
      'sah': 0,
      'saq': 3,
      'se': 7,
      'seh': 3,
      'ses': 0,
      'sg': 0,
      'sh': 11,
      'shi': 19,
      'sk': 12,
      'sl': 14,
      'sma': 7,
      'smi': 7,
      'smj': 7,
      'smn': 7,
      'sms': 7,
      'sn': 3,
      'so': 3,
      'sq': 3,
      'sr': 11,
      'ss': 3,
      'ssy': 3,
      'st': 3,
      'sv': 3,
      'sw': 3,
      'syr': 3,
      'ta': 3,
      'te': 3,
      'teo': 3,
      'th': 0,
      'ti': 4,
      'tig': 3,
      'tk': 3,
      'tl': 4,
      'tn': 3,
      'to': 0,
      'tr': 0,
      'ts': 3,
      'tzm': 22,
      'uk': 11,
      'ur': 3,
      've': 3,
      'vi': 0,
      'vun': 3,
      'wa': 4,
      'wae': 3,
      'wo': 0,
      'xh': 3,
      'xog': 3,
      'yo': 0,
      'zh': 0,
      'zu': 3
    };

    // utility functions for plural rules methods
    function isIn(n, list) {
      return list.indexOf(n) !== -1;
    }
    function isBetween(n, start, end) {
      return start <= n && n <= end;
    }

    // list of all plural rules methods:
    // map an integer to the plural form name to use
    var pluralRules = {
      '0': function(n) {
        return 'other';
      },
      '1': function(n) {
        if ((isBetween((n % 100), 3, 10)))
          return 'few';
        if (n === 0)
          return 'zero';
        if ((isBetween((n % 100), 11, 99)))
          return 'many';
        if (n == 2)
          return 'two';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '2': function(n) {
        if (n !== 0 && (n % 10) === 0)
          return 'many';
        if (n == 2)
          return 'two';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '3': function(n) {
        if (n == 1)
          return 'one';
        return 'other';
      },
      '4': function(n) {
        if ((isBetween(n, 0, 1)))
          return 'one';
        return 'other';
      },
      '5': function(n) {
        if ((isBetween(n, 0, 2)) && n != 2)
          return 'one';
        return 'other';
      },
      '6': function(n) {
        if (n === 0)
          return 'zero';
        if ((n % 10) == 1 && (n % 100) != 11)
          return 'one';
        return 'other';
      },
      '7': function(n) {
        if (n == 2)
          return 'two';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '8': function(n) {
        if ((isBetween(n, 3, 6)))
          return 'few';
        if ((isBetween(n, 7, 10)))
          return 'many';
        if (n == 2)
          return 'two';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '9': function(n) {
        if (n === 0 || n != 1 && (isBetween((n % 100), 1, 19)))
          return 'few';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '10': function(n) {
        if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19)))
          return 'few';
        if ((n % 10) == 1 && !(isBetween((n % 100), 11, 19)))
          return 'one';
        return 'other';
      },
      '11': function(n) {
        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
          return 'few';
        if ((n % 10) === 0 ||
            (isBetween((n % 10), 5, 9)) ||
            (isBetween((n % 100), 11, 14)))
          return 'many';
        if ((n % 10) == 1 && (n % 100) != 11)
          return 'one';
        return 'other';
      },
      '12': function(n) {
        if ((isBetween(n, 2, 4)))
          return 'few';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '13': function(n) {
        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
          return 'few';
        if (n != 1 && (isBetween((n % 10), 0, 1)) ||
            (isBetween((n % 10), 5, 9)) ||
            (isBetween((n % 100), 12, 14)))
          return 'many';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '14': function(n) {
        if ((isBetween((n % 100), 3, 4)))
          return 'few';
        if ((n % 100) == 2)
          return 'two';
        if ((n % 100) == 1)
          return 'one';
        return 'other';
      },
      '15': function(n) {
        if (n === 0 || (isBetween((n % 100), 2, 10)))
          return 'few';
        if ((isBetween((n % 100), 11, 19)))
          return 'many';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '16': function(n) {
        if ((n % 10) == 1 && n != 11)
          return 'one';
        return 'other';
      },
      '17': function(n) {
        if (n == 3)
          return 'few';
        if (n === 0)
          return 'zero';
        if (n == 6)
          return 'many';
        if (n == 2)
          return 'two';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '18': function(n) {
        if (n === 0)
          return 'zero';
        if ((isBetween(n, 0, 2)) && n !== 0 && n != 2)
          return 'one';
        return 'other';
      },
      '19': function(n) {
        if ((isBetween(n, 2, 10)))
          return 'few';
        if ((isBetween(n, 0, 1)))
          return 'one';
        return 'other';
      },
      '20': function(n) {
        if ((isBetween((n % 10), 3, 4) || ((n % 10) == 9)) && !(
            isBetween((n % 100), 10, 19) ||
            isBetween((n % 100), 70, 79) ||
            isBetween((n % 100), 90, 99)
            ))
          return 'few';
        if ((n % 1000000) === 0 && n !== 0)
          return 'many';
        if ((n % 10) == 2 && !isIn((n % 100), [12, 72, 92]))
          return 'two';
        if ((n % 10) == 1 && !isIn((n % 100), [11, 71, 91]))
          return 'one';
        return 'other';
      },
      '21': function(n) {
        if (n === 0)
          return 'zero';
        if (n == 1)
          return 'one';
        return 'other';
      },
      '22': function(n) {
        if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99)))
          return 'one';
        return 'other';
      },
      '23': function(n) {
        if ((isBetween((n % 10), 1, 2)) || (n % 20) === 0)
          return 'one';
        return 'other';
      },
      '24': function(n) {
        if ((isBetween(n, 3, 10) || isBetween(n, 13, 19)))
          return 'few';
        if (isIn(n, [2, 12]))
          return 'two';
        if (isIn(n, [1, 11]))
          return 'one';
        return 'other';
      }
    };

    // return a function that gives the plural form name for a given integer
    var index = locales2rules[lang.replace(/-.*$/, '')];
    if (!(index in pluralRules)) {
      console.warn('plural form unknown for [' + lang + ']');
      return function() { return 'other'; };
    }
    return pluralRules[index];
  }

  // pre-defined 'plural' macro
  gMacros.plural = function(str, param, key, prop) {
    var n = parseFloat(param);
    if (isNaN(n))
      return str;

    // TODO: support other properties (l20n still doesn't...)
    if (prop != gTextProp)
      return str;

    // initialize _pluralRules
    if (!gMacros._pluralRules) {
      gMacros._pluralRules = getPluralRules(gLanguage);
    }
    var index = '[' + gMacros._pluralRules(n) + ']';

    // try to find a [zero|one|two] key if it's defined
    if (n === 0 && (key + '[zero]') in gL10nData) {
      str = gL10nData[key + '[zero]'][prop];
    } else if (n == 1 && (key + '[one]') in gL10nData) {
      str = gL10nData[key + '[one]'][prop];
    } else if (n == 2 && (key + '[two]') in gL10nData) {
      str = gL10nData[key + '[two]'][prop];
    } else if ((key + index) in gL10nData) {
      str = gL10nData[key + index][prop];
    } else if ((key + '[other]') in gL10nData) {
      str = gL10nData[key + '[other]'][prop];
    }

    return str;
  };


  /**
   * l10n dictionary functions
   */

  // fetch an l10n object, warn if not found, apply `args' if possible
  function getL10nData(key, args, fallback) {
    var data = gL10nData[key];
    if (!data) {
      console.warn('#' + key + ' is undefined.');
      if (!fallback) {
        return null;
      }
      data = fallback;
    }

    /** This is where l10n expressions should be processed.
      * The plan is to support C-style expressions from the l20n project;
      * until then, only two kinds of simple expressions are supported:
      *   {[ index ]} and {{ arguments }}.
      */
    var rv = {};
    for (var prop in data) {
      var str = data[prop];
      str = substIndexes(str, args, key, prop);
      str = substArguments(str, args, key);
      rv[prop] = str;
    }
    return rv;
  }

  // replace {[macros]} with their values
  function substIndexes(str, args, key, prop) {
    var reIndex = /\{\[\s*([a-zA-Z]+)\(([a-zA-Z]+)\)\s*\]\}/;
    var reMatch = reIndex.exec(str);
    if (!reMatch || !reMatch.length)
      return str;

    // an index/macro has been found
    // Note: at the moment, only one parameter is supported
    var macroName = reMatch[1];
    var paramName = reMatch[2];
    var param;
    if (args && paramName in args) {
      param = args[paramName];
    } else if (paramName in gL10nData) {
      param = gL10nData[paramName];
    }

    // there's no macro parser yet: it has to be defined in gMacros
    if (macroName in gMacros) {
      var macro = gMacros[macroName];
      str = macro(str, param, key, prop);
    }
    return str;
  }

  // replace {{arguments}} with their values
  function substArguments(str, args, key) {
    var reArgs = /\{\{\s*(.+?)\s*\}\}/g;
    return str.replace(reArgs, function(matched_text, arg) {
      if (args && arg in args) {
        return args[arg];
      }
      if (arg in gL10nData) {
        return gL10nData[arg];
      }
      console.log('argument {{' + arg + '}} for #' + key + ' is undefined.');
      return matched_text;
    });
  }

  // translate an HTML element
  function translateElement(element) {
    var l10n = getL10nAttributes(element);
    if (!l10n.id)
      return;

    // get the related l10n object
    var data = getL10nData(l10n.id, l10n.args);
    if (!data) {
      console.warn('#' + l10n.id + ' is undefined.');
      return;
    }

    // translate element (TODO: security checks?)
    if (data[gTextProp]) { // XXX
      if (getChildElementCount(element) === 0) {
        element[gTextProp] = data[gTextProp];
      } else {
        // this element has element children: replace the content of the first
        // (non-empty) child textNode and clear other child textNodes
        var children = element.childNodes;
        var found = false;
        for (var i = 0, l = children.length; i < l; i++) {
          if (children[i].nodeType === 3 && /\S/.test(children[i].nodeValue)) {
            if (found) {
              children[i].nodeValue = '';
            } else {
              children[i].nodeValue = data[gTextProp];
              found = true;
            }
          }
        }
        // if no (non-empty) textNode is found, insert a textNode before the
        // first element child.
        if (!found) {
          var textNode = document.createTextNode(data[gTextProp]);
          element.insertBefore(textNode, element.firstChild);
        }
      }
      delete data[gTextProp];
    }

    for (var k in data) {
      element[k] = data[k];
    }
  }

  // webkit browsers don't currently support 'children' on SVG elements...
  function getChildElementCount(element) {
    if (element.children) {
      return element.children.length;
    }
    if (typeof element.childElementCount !== 'undefined') {
      return element.childElementCount;
    }
    var count = 0;
    for (var i = 0; i < element.childNodes.length; i++) {
      count += element.nodeType === 1 ? 1 : 0;
    }
    return count;
  }

  // translate an HTML subtree
  function translateFragment(element) {
    element = element || document.documentElement;

    // check all translatable children (= w/ a `data-l10n-id' attribute)
    var children = getTranslatableChildren(element);
    var elementCount = children.length;
    for (var i = 0; i < elementCount; i++) {
      translateElement(children[i]);
    }

    // translate element itself if necessary
    translateElement(element);
  }

  return {
    // get a localized string
    get: function(key, args, fallbackString) {
      var index = key.lastIndexOf('.');
      var prop = gTextProp;
      if (index > 0) { // An attribute has been specified
        prop = key.substr(index + 1);
        key = key.substring(0, index);
      }
      var fallback;
      if (fallbackString) {
        fallback = {};
        fallback[prop] = fallbackString;
      }
      var data = getL10nData(key, args, fallback);
      if (data && prop in data) {
        return data[prop];
      }
      return '{{' + key + '}}';
    },

    // debug
    getData: function() { return gL10nData; },
    getText: function() { return gTextData; },

    // get|set the document language
    getLanguage: function() { return gLanguage; },
    setLanguage: function(lang, callback) {
      loadLocale(lang, function() {
        if (callback)
          callback();
        translateFragment();
      });
    },

    // get the direction (ltr|rtl) of the current language
    getDirection: function() {
      // http://www.w3.org/International/questions/qa-scripts
      // Arabic, Hebrew, Farsi, Pashto, Urdu
      var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];
      var shortCode = gLanguage.split('-', 1)[0];
      return (rtlList.indexOf(shortCode) >= 0) ? 'rtl' : 'ltr';
    },

    // translate an element or document fragment
    translate: translateFragment,

    // this can be used to prevent race conditions
    getReadyState: function() { return gReadyState; },
    ready: function(callback) {
      if (!callback) {
        return;
      } else if (gReadyState == 'complete' || gReadyState == 'interactive') {
        window.setTimeout(function() {
          callback();
        });
      } else if (document.addEventListener) {
        document.addEventListener('localized', function once() {
          document.removeEventListener('localized', once);
          callback();
        });
      }
    }
  };
}) (window, document);
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*jshint globalstrict: false */
/* globals PDFJS */

// Initializing PDFJS global object (if still undefined)
if (typeof PDFJS === 'undefined') {
  (typeof window !== 'undefined' ? window : this).PDFJS = {};
}

PDFJS.version = '1.1.218';
PDFJS.build = '99415a7';

(function pdfjsWrapper() {
  // Use strict in our context only - users might not want it
  'use strict';

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref, URL,
           Promise */

'use strict';

var globalScope = (typeof window === 'undefined') ? this : window;

var isWorker = (typeof window === 'undefined');

var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];

var TextRenderingMode = {
  FILL: 0,
  STROKE: 1,
  FILL_STROKE: 2,
  INVISIBLE: 3,
  FILL_ADD_TO_PATH: 4,
  STROKE_ADD_TO_PATH: 5,
  FILL_STROKE_ADD_TO_PATH: 6,
  ADD_TO_PATH: 7,
  FILL_STROKE_MASK: 3,
  ADD_TO_PATH_FLAG: 4
};

var ImageKind = {
  GRAYSCALE_1BPP: 1,
  RGB_24BPP: 2,
  RGBA_32BPP: 3
};

var AnnotationType = {
  WIDGET: 1,
  TEXT: 2,
  LINK: 3
};

var StreamType = {
  UNKNOWN: 0,
  FLATE: 1,
  LZW: 2,
  DCT: 3,
  JPX: 4,
  JBIG: 5,
  A85: 6,
  AHX: 7,
  CCF: 8,
  RL: 9
};

var FontType = {
  UNKNOWN: 0,
  TYPE1: 1,
  TYPE1C: 2,
  CIDFONTTYPE0: 3,
  CIDFONTTYPE0C: 4,
  TRUETYPE: 5,
  CIDFONTTYPE2: 6,
  TYPE3: 7,
  OPENTYPE: 8,
  TYPE0: 9,
  MMTYPE1: 10
};

// The global PDFJS object exposes the API
// In production, it will be declared outside a global wrapper
// In development, it will be declared here
if (!globalScope.PDFJS) {
  globalScope.PDFJS = {};
}

globalScope.PDFJS.pdfBug = false;

PDFJS.VERBOSITY_LEVELS = {
  errors: 0,
  warnings: 1,
  infos: 5
};

// All the possible operations for an operator list.
var OPS = PDFJS.OPS = {
  // Intentionally start from 1 so it is easy to spot bad operators that will be
  // 0's.
  dependency: 1,
  setLineWidth: 2,
  setLineCap: 3,
  setLineJoin: 4,
  setMiterLimit: 5,
  setDash: 6,
  setRenderingIntent: 7,
  setFlatness: 8,
  setGState: 9,
  save: 10,
  restore: 11,
  transform: 12,
  moveTo: 13,
  lineTo: 14,
  curveTo: 15,
  curveTo2: 16,
  curveTo3: 17,
  closePath: 18,
  rectangle: 19,
  stroke: 20,
  closeStroke: 21,
  fill: 22,
  eoFill: 23,
  fillStroke: 24,
  eoFillStroke: 25,
  closeFillStroke: 26,
  closeEOFillStroke: 27,
  endPath: 28,
  clip: 29,
  eoClip: 30,
  beginText: 31,
  endText: 32,
  setCharSpacing: 33,
  setWordSpacing: 34,
  setHScale: 35,
  setLeading: 36,
  setFont: 37,
  setTextRenderingMode: 38,
  setTextRise: 39,
  moveText: 40,
  setLeadingMoveText: 41,
  setTextMatrix: 42,
  nextLine: 43,
  showText: 44,
  showSpacedText: 45,
  nextLineShowText: 46,
  nextLineSetSpacingShowText: 47,
  setCharWidth: 48,
  setCharWidthAndBounds: 49,
  setStrokeColorSpace: 50,
  setFillColorSpace: 51,
  setStrokeColor: 52,
  setStrokeColorN: 53,
  setFillColor: 54,
  setFillColorN: 55,
  setStrokeGray: 56,
  setFillGray: 57,
  setStrokeRGBColor: 58,
  setFillRGBColor: 59,
  setStrokeCMYKColor: 60,
  setFillCMYKColor: 61,
  shadingFill: 62,
  beginInlineImage: 63,
  beginImageData: 64,
  endInlineImage: 65,
  paintXObject: 66,
  markPoint: 67,
  markPointProps: 68,
  beginMarkedContent: 69,
  beginMarkedContentProps: 70,
  endMarkedContent: 71,
  beginCompat: 72,
  endCompat: 73,
  paintFormXObjectBegin: 74,
  paintFormXObjectEnd: 75,
  beginGroup: 76,
  endGroup: 77,
  beginAnnotations: 78,
  endAnnotations: 79,
  beginAnnotation: 80,
  endAnnotation: 81,
  paintJpegXObject: 82,
  paintImageMaskXObject: 83,
  paintImageMaskXObjectGroup: 84,
  paintImageXObject: 85,
  paintInlineImageXObject: 86,
  paintInlineImageXObjectGroup: 87,
  paintImageXObjectRepeat: 88,
  paintImageMaskXObjectRepeat: 89,
  paintSolidColorImageMask: 90,
  constructPath: 91
};

// A notice for devs. These are good for things that are helpful to devs, such
// as warning that Workers were disabled, which is important to devs but not
// end users.
function info(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) {
    console.log('Info: ' + msg);
  }
}

// Non-fatal warnings.
function warn(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) {
    console.log('Warning: ' + msg);
  }
}

// Fatal errors that should trigger the fallback UI and halt execution by
// throwing an exception.
function error(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) {
    console.log('Error: ' + msg);
    console.log(backtrace());
  }
  UnsupportedManager.notify(UNSUPPORTED_FEATURES.unknown);
  throw new Error(msg);
}

function backtrace() {
  try {
    throw new Error();
  } catch (e) {
    return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
  }
}

function assert(cond, msg) {
  if (!cond) {
    error(msg);
  }
}

var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = {
  unknown: 'unknown',
  forms: 'forms',
  javaScript: 'javaScript',
  smask: 'smask',
  shadingPattern: 'shadingPattern',
  font: 'font'
};

var UnsupportedManager = PDFJS.UnsupportedManager =
  (function UnsupportedManagerClosure() {
  var listeners = [];
  return {
    listen: function (cb) {
      listeners.push(cb);
    },
    notify: function (featureId) {
      warn('Unsupported feature "' + featureId + '"');
      for (var i = 0, ii = listeners.length; i < ii; i++) {
        listeners[i](featureId);
      }
    }
  };
})();

// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
// absolute URL, it will be returned as is.
function combineUrl(baseUrl, url) {
  if (!url) {
    return baseUrl;
  }
  if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) {
    return url;
  }
  var i;
  if (url.charAt(0) === '/') {
    // absolute path
    i = baseUrl.indexOf('://');
    if (url.charAt(1) === '/') {
      ++i;
    } else {
      i = baseUrl.indexOf('/', i + 3);
    }
    return baseUrl.substring(0, i) + url;
  } else {
    // relative path
    var pathLength = baseUrl.length;
    i = baseUrl.lastIndexOf('#');
    pathLength = i >= 0 ? i : pathLength;
    i = baseUrl.lastIndexOf('?', pathLength);
    pathLength = i >= 0 ? i : pathLength;
    var prefixLength = baseUrl.lastIndexOf('/', pathLength);
    return baseUrl.substring(0, prefixLength + 1) + url;
  }
}

// Validates if URL is safe and allowed, e.g. to avoid XSS.
function isValidUrl(url, allowRelative) {
  if (!url) {
    return false;
  }
  // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
  // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
  var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url);
  if (!protocol) {
    return allowRelative;
  }
  protocol = protocol[0].toLowerCase();
  switch (protocol) {
    case 'http':
    case 'https':
    case 'ftp':
    case 'mailto':
    case 'tel':
      return true;
    default:
      return false;
  }
}
PDFJS.isValidUrl = isValidUrl;

function shadow(obj, prop, value) {
  Object.defineProperty(obj, prop, { value: value,
                                     enumerable: true,
                                     configurable: true,
                                     writable: false });
  return value;
}
PDFJS.shadow = shadow;

var PasswordResponses = PDFJS.PasswordResponses = {
  NEED_PASSWORD: 1,
  INCORRECT_PASSWORD: 2
};

var PasswordException = (function PasswordExceptionClosure() {
  function PasswordException(msg, code) {
    this.name = 'PasswordException';
    this.message = msg;
    this.code = code;
  }

  PasswordException.prototype = new Error();
  PasswordException.constructor = PasswordException;

  return PasswordException;
})();
PDFJS.PasswordException = PasswordException;

var UnknownErrorException = (function UnknownErrorExceptionClosure() {
  function UnknownErrorException(msg, details) {
    this.name = 'UnknownErrorException';
    this.message = msg;
    this.details = details;
  }

  UnknownErrorException.prototype = new Error();
  UnknownErrorException.constructor = UnknownErrorException;

  return UnknownErrorException;
})();
PDFJS.UnknownErrorException = UnknownErrorException;

var InvalidPDFException = (function InvalidPDFExceptionClosure() {
  function InvalidPDFException(msg) {
    this.name = 'InvalidPDFException';
    this.message = msg;
  }

  InvalidPDFException.prototype = new Error();
  InvalidPDFException.constructor = InvalidPDFException;

  return InvalidPDFException;
})();
PDFJS.InvalidPDFException = InvalidPDFException;

var MissingPDFException = (function MissingPDFExceptionClosure() {
  function MissingPDFException(msg) {
    this.name = 'MissingPDFException';
    this.message = msg;
  }

  MissingPDFException.prototype = new Error();
  MissingPDFException.constructor = MissingPDFException;

  return MissingPDFException;
})();
PDFJS.MissingPDFException = MissingPDFException;

var UnexpectedResponseException =
    (function UnexpectedResponseExceptionClosure() {
  function UnexpectedResponseException(msg, status) {
    this.name = 'UnexpectedResponseException';
    this.message = msg;
    this.status = status;
  }

  UnexpectedResponseException.prototype = new Error();
  UnexpectedResponseException.constructor = UnexpectedResponseException;

  return UnexpectedResponseException;
})();
PDFJS.UnexpectedResponseException = UnexpectedResponseException;

var NotImplementedException = (function NotImplementedExceptionClosure() {
  function NotImplementedException(msg) {
    this.message = msg;
  }

  NotImplementedException.prototype = new Error();
  NotImplementedException.prototype.name = 'NotImplementedException';
  NotImplementedException.constructor = NotImplementedException;

  return NotImplementedException;
})();

var MissingDataException = (function MissingDataExceptionClosure() {
  function MissingDataException(begin, end) {
    this.begin = begin;
    this.end = end;
    this.message = 'Missing data [' + begin + ', ' + end + ')';
  }

  MissingDataException.prototype = new Error();
  MissingDataException.prototype.name = 'MissingDataException';
  MissingDataException.constructor = MissingDataException;

  return MissingDataException;
})();

var XRefParseException = (function XRefParseExceptionClosure() {
  function XRefParseException(msg) {
    this.message = msg;
  }

  XRefParseException.prototype = new Error();
  XRefParseException.prototype.name = 'XRefParseException';
  XRefParseException.constructor = XRefParseException;

  return XRefParseException;
})();


function bytesToString(bytes) {
  assert(bytes !== null && typeof bytes === 'object' &&
         bytes.length !== undefined, 'Invalid argument for bytesToString');
  var length = bytes.length;
  var MAX_ARGUMENT_COUNT = 8192;
  if (length < MAX_ARGUMENT_COUNT) {
    return String.fromCharCode.apply(null, bytes);
  }
  var strBuf = [];
  for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
    var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
    var chunk = bytes.subarray(i, chunkEnd);
    strBuf.push(String.fromCharCode.apply(null, chunk));
  }
  return strBuf.join('');
}

function stringToBytes(str) {
  assert(typeof str === 'string', 'Invalid argument for stringToBytes');
  var length = str.length;
  var bytes = new Uint8Array(length);
  for (var i = 0; i < length; ++i) {
    bytes[i] = str.charCodeAt(i) & 0xFF;
  }
  return bytes;
}

function string32(value) {
  return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff,
                             (value >> 8) & 0xff, value & 0xff);
}

function log2(x) {
  var n = 1, i = 0;
  while (x > n) {
    n <<= 1;
    i++;
  }
  return i;
}

function readInt8(data, start) {
  return (data[start] << 24) >> 24;
}

function readUint16(data, offset) {
  return (data[offset] << 8) | data[offset + 1];
}

function readUint32(data, offset) {
  return ((data[offset] << 24) | (data[offset + 1] << 16) |
         (data[offset + 2] << 8) | data[offset + 3]) >>> 0;
}

// Lazy test the endianness of the platform
// NOTE: This will be 'true' for simulated TypedArrays
function isLittleEndian() {
  var buffer8 = new Uint8Array(2);
  buffer8[0] = 1;
  var buffer16 = new Uint16Array(buffer8.buffer);
  return (buffer16[0] === 1);
}

Object.defineProperty(PDFJS, 'isLittleEndian', {
  configurable: true,
  get: function PDFJS_isLittleEndian() {
    return shadow(PDFJS, 'isLittleEndian', isLittleEndian());
  }
});

  // Lazy test if the userAgant support CanvasTypedArrays
function hasCanvasTypedArrays() {
  var canvas = document.createElement('canvas');
  canvas.width = canvas.height = 1;
  var ctx = canvas.getContext('2d');
  var imageData = ctx.createImageData(1, 1);
  return (typeof imageData.data.buffer !== 'undefined');
}

Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', {
  configurable: true,
  get: function PDFJS_hasCanvasTypedArrays() {
    return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays());
  }
});

var Uint32ArrayView = (function Uint32ArrayViewClosure() {

  function Uint32ArrayView(buffer, length) {
    this.buffer = buffer;
    this.byteLength = buffer.length;
    this.length = length === undefined ? (this.byteLength >> 2) : length;
    ensureUint32ArrayViewProps(this.length);
  }
  Uint32ArrayView.prototype = Object.create(null);

  var uint32ArrayViewSetters = 0;
  function createUint32ArrayProp(index) {
    return {
      get: function () {
        var buffer = this.buffer, offset = index << 2;
        return (buffer[offset] | (buffer[offset + 1] << 8) |
          (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0;
      },
      set: function (value) {
        var buffer = this.buffer, offset = index << 2;
        buffer[offset] = value & 255;
        buffer[offset + 1] = (value >> 8) & 255;
        buffer[offset + 2] = (value >> 16) & 255;
        buffer[offset + 3] = (value >>> 24) & 255;
      }
    };
  }

  function ensureUint32ArrayViewProps(length) {
    while (uint32ArrayViewSetters < length) {
      Object.defineProperty(Uint32ArrayView.prototype,
        uint32ArrayViewSetters,
        createUint32ArrayProp(uint32ArrayViewSetters));
      uint32ArrayViewSetters++;
    }
  }

  return Uint32ArrayView;
})();

var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];

var Util = PDFJS.Util = (function UtilClosure() {
  function Util() {}

  var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')'];

  // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids
  // creating many intermediate strings.
  Util.makeCssRgb = function Util_makeCssRgb(r, g, b) {
    rgbBuf[1] = r;
    rgbBuf[3] = g;
    rgbBuf[5] = b;
    return rgbBuf.join('');
  };

  // Concatenates two transformation matrices together and returns the result.
  Util.transform = function Util_transform(m1, m2) {
    return [
      m1[0] * m2[0] + m1[2] * m2[1],
      m1[1] * m2[0] + m1[3] * m2[1],
      m1[0] * m2[2] + m1[2] * m2[3],
      m1[1] * m2[2] + m1[3] * m2[3],
      m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
      m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
    ];
  };

  // For 2d affine transforms
  Util.applyTransform = function Util_applyTransform(p, m) {
    var xt = p[0] * m[0] + p[1] * m[2] + m[4];
    var yt = p[0] * m[1] + p[1] * m[3] + m[5];
    return [xt, yt];
  };

  Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
    var d = m[0] * m[3] - m[1] * m[2];
    var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
    var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
    return [xt, yt];
  };

  // Applies the transform to the rectangle and finds the minimum axially
  // aligned bounding box.
  Util.getAxialAlignedBoundingBox =
    function Util_getAxialAlignedBoundingBox(r, m) {

    var p1 = Util.applyTransform(r, m);
    var p2 = Util.applyTransform(r.slice(2, 4), m);
    var p3 = Util.applyTransform([r[0], r[3]], m);
    var p4 = Util.applyTransform([r[2], r[1]], m);
    return [
      Math.min(p1[0], p2[0], p3[0], p4[0]),
      Math.min(p1[1], p2[1], p3[1], p4[1]),
      Math.max(p1[0], p2[0], p3[0], p4[0]),
      Math.max(p1[1], p2[1], p3[1], p4[1])
    ];
  };

  Util.inverseTransform = function Util_inverseTransform(m) {
    var d = m[0] * m[3] - m[1] * m[2];
    return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
      (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
  };

  // Apply a generic 3d matrix M on a 3-vector v:
  //   | a b c |   | X |
  //   | d e f | x | Y |
  //   | g h i |   | Z |
  // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
  // with v as [X,Y,Z]
  Util.apply3dTransform = function Util_apply3dTransform(m, v) {
    return [
      m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
      m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
      m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
    ];
  };

  // This calculation uses Singular Value Decomposition.
  // The SVD can be represented with formula A = USV. We are interested in the
  // matrix S here because it represents the scale values.
  Util.singularValueDecompose2dScale =
    function Util_singularValueDecompose2dScale(m) {

    var transpose = [m[0], m[2], m[1], m[3]];

    // Multiply matrix m with its transpose.
    var a = m[0] * transpose[0] + m[1] * transpose[2];
    var b = m[0] * transpose[1] + m[1] * transpose[3];
    var c = m[2] * transpose[0] + m[3] * transpose[2];
    var d = m[2] * transpose[1] + m[3] * transpose[3];

    // Solve the second degree polynomial to get roots.
    var first = (a + d) / 2;
    var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
    var sx = first + second || 1;
    var sy = first - second || 1;

    // Scale values are the square roots of the eigenvalues.
    return [Math.sqrt(sx), Math.sqrt(sy)];
  };

  // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
  // For coordinate systems whose origin lies in the bottom-left, this
  // means normalization to (BL,TR) ordering. For systems with origin in the
  // top-left, this means (TL,BR) ordering.
  Util.normalizeRect = function Util_normalizeRect(rect) {
    var r = rect.slice(0); // clone rect
    if (rect[0] > rect[2]) {
      r[0] = rect[2];
      r[2] = rect[0];
    }
    if (rect[1] > rect[3]) {
      r[1] = rect[3];
      r[3] = rect[1];
    }
    return r;
  };

  // Returns a rectangle [x1, y1, x2, y2] corresponding to the
  // intersection of rect1 and rect2. If no intersection, returns 'false'
  // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
  Util.intersect = function Util_intersect(rect1, rect2) {
    function compare(a, b) {
      return a - b;
    }

    // Order points along the axes
    var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
        orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
        result = [];

    rect1 = Util.normalizeRect(rect1);
    rect2 = Util.normalizeRect(rect2);

    // X: first and second points belong to different rectangles?
    if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
        (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
      // Intersection must be between second and third points
      result[0] = orderedX[1];
      result[2] = orderedX[2];
    } else {
      return false;
    }

    // Y: first and second points belong to different rectangles?
    if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
        (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
      // Intersection must be between second and third points
      result[1] = orderedY[1];
      result[3] = orderedY[2];
    } else {
      return false;
    }

    return result;
  };

  Util.sign = function Util_sign(num) {
    return num < 0 ? -1 : 1;
  };

  Util.appendToArray = function Util_appendToArray(arr1, arr2) {
    Array.prototype.push.apply(arr1, arr2);
  };

  Util.prependToArray = function Util_prependToArray(arr1, arr2) {
    Array.prototype.unshift.apply(arr1, arr2);
  };

  Util.extendObj = function extendObj(obj1, obj2) {
    for (var key in obj2) {
      obj1[key] = obj2[key];
    }
  };

  Util.getInheritableProperty = function Util_getInheritableProperty(dict,
                                                                     name) {
    while (dict && !dict.has(name)) {
      dict = dict.get('Parent');
    }
    if (!dict) {
      return null;
    }
    return dict.get(name);
  };

  Util.inherit = function Util_inherit(sub, base, prototype) {
    sub.prototype = Object.create(base.prototype);
    sub.prototype.constructor = sub;
    for (var prop in prototype) {
      sub.prototype[prop] = prototype[prop];
    }
  };

  Util.loadScript = function Util_loadScript(src, callback) {
    var script = document.createElement('script');
    var loaded = false;
    script.setAttribute('src', src);
    if (callback) {
      script.onload = function() {
        if (!loaded) {
          callback();
        }
        loaded = true;
      };
    }
    document.getElementsByTagName('head')[0].appendChild(script);
  };

  return Util;
})();

/**
 * PDF page viewport created based on scale, rotation and offset.
 * @class
 * @alias PDFJS.PageViewport
 */
var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
  /**
   * @constructor
   * @private
   * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates.
   * @param scale {number} scale of the viewport.
   * @param rotation {number} rotations of the viewport in degrees.
   * @param offsetX {number} offset X
   * @param offsetY {number} offset Y
   * @param dontFlip {boolean} if true, axis Y will not be flipped.
   */
  function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
    this.viewBox = viewBox;
    this.scale = scale;
    this.rotation = rotation;
    this.offsetX = offsetX;
    this.offsetY = offsetY;

    // creating transform to convert pdf coordinate system to the normal
    // canvas like coordinates taking in account scale and rotation
    var centerX = (viewBox[2] + viewBox[0]) / 2;
    var centerY = (viewBox[3] + viewBox[1]) / 2;
    var rotateA, rotateB, rotateC, rotateD;
    rotation = rotation % 360;
    rotation = rotation < 0 ? rotation + 360 : rotation;
    switch (rotation) {
      case 180:
        rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
        break;
      case 90:
        rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
        break;
      case 270:
        rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
        break;
      //case 0:
      default:
        rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
        break;
    }

    if (dontFlip) {
      rotateC = -rotateC; rotateD = -rotateD;
    }

    var offsetCanvasX, offsetCanvasY;
    var width, height;
    if (rotateA === 0) {
      offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
      offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
      width = Math.abs(viewBox[3] - viewBox[1]) * scale;
      height = Math.abs(viewBox[2] - viewBox[0]) * scale;
    } else {
      offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
      offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
      width = Math.abs(viewBox[2] - viewBox[0]) * scale;
      height = Math.abs(viewBox[3] - viewBox[1]) * scale;
    }
    // creating transform for the following operations:
    // translate(-centerX, -centerY), rotate and flip vertically,
    // scale, and translate(offsetCanvasX, offsetCanvasY)
    this.transform = [
      rotateA * scale,
      rotateB * scale,
      rotateC * scale,
      rotateD * scale,
      offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
      offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
    ];

    this.width = width;
    this.height = height;
    this.fontScale = scale;
  }
  PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ {
    /**
     * Clones viewport with additional properties.
     * @param args {Object} (optional) If specified, may contain the 'scale' or
     * 'rotation' properties to override the corresponding properties in
     * the cloned viewport.
     * @returns {PDFJS.PageViewport} Cloned viewport.
     */
    clone: function PageViewPort_clone(args) {
      args = args || {};
      var scale = 'scale' in args ? args.scale : this.scale;
      var rotation = 'rotation' in args ? args.rotation : this.rotation;
      return new PageViewport(this.viewBox.slice(), scale, rotation,
                              this.offsetX, this.offsetY, args.dontFlip);
    },
    /**
     * Converts PDF point to the viewport coordinates. For examples, useful for
     * converting PDF location into canvas pixel coordinates.
     * @param x {number} X coordinate.
     * @param y {number} Y coordinate.
     * @returns {Object} Object that contains 'x' and 'y' properties of the
     * point in the viewport coordinate space.
     * @see {@link convertToPdfPoint}
     * @see {@link convertToViewportRectangle}
     */
    convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
      return Util.applyTransform([x, y], this.transform);
    },
    /**
     * Converts PDF rectangle to the viewport coordinates.
     * @param rect {Array} xMin, yMin, xMax and yMax coordinates.
     * @returns {Array} Contains corresponding coordinates of the rectangle
     * in the viewport coordinate space.
     * @see {@link convertToViewportPoint}
     */
    convertToViewportRectangle:
      function PageViewport_convertToViewportRectangle(rect) {
      var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
      var br = Util.applyTransform([rect[2], rect[3]], this.transform);
      return [tl[0], tl[1], br[0], br[1]];
    },
    /**
     * Converts viewport coordinates to the PDF location. For examples, useful
     * for converting canvas pixel location into PDF one.
     * @param x {number} X coordinate.
     * @param y {number} Y coordinate.
     * @returns {Object} Object that contains 'x' and 'y' properties of the
     * point in the PDF coordinate space.
     * @see {@link convertToViewportPoint}
     */
    convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
      return Util.applyInverseTransform([x, y], this.transform);
    }
  };
  return PageViewport;
})();

var PDFStringTranslateTable = [
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
  0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
  0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
  0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
];

function stringToPDFString(str) {
  var i, n = str.length, strBuf = [];
  if (str[0] === '\xFE' && str[1] === '\xFF') {
    // UTF16BE BOM
    for (i = 2; i < n; i += 2) {
      strBuf.push(String.fromCharCode(
        (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1)));
    }
  } else {
    for (i = 0; i < n; ++i) {
      var code = PDFStringTranslateTable[str.charCodeAt(i)];
      strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
    }
  }
  return strBuf.join('');
}

function stringToUTF8String(str) {
  return decodeURIComponent(escape(str));
}

function utf8StringToString(str) {
  return unescape(encodeURIComponent(str));
}

function isEmptyObj(obj) {
  for (var key in obj) {
    return false;
  }
  return true;
}

function isBool(v) {
  return typeof v === 'boolean';
}

function isInt(v) {
  return typeof v === 'number' && ((v | 0) === v);
}

function isNum(v) {
  return typeof v === 'number';
}

function isString(v) {
  return typeof v === 'string';
}

function isName(v) {
  return v instanceof Name;
}

function isCmd(v, cmd) {
  return v instanceof Cmd && (cmd === undefined || v.cmd === cmd);
}

function isDict(v, type) {
  if (!(v instanceof Dict)) {
    return false;
  }
  if (!type) {
    return true;
  }
  var dictType = v.get('Type');
  return isName(dictType) && dictType.name === type;
}

function isArray(v) {
  return v instanceof Array;
}

function isStream(v) {
  return typeof v === 'object' && v !== null && v.getBytes !== undefined;
}

function isArrayBuffer(v) {
  return typeof v === 'object' && v !== null && v.byteLength !== undefined;
}

function isRef(v) {
  return v instanceof Ref;
}

/**
 * Promise Capability object.
 *
 * @typedef {Object} PromiseCapability
 * @property {Promise} promise - A promise object.
 * @property {function} resolve - Fullfills the promise.
 * @property {function} reject - Rejects the promise.
 */

/**
 * Creates a promise capability object.
 * @alias PDFJS.createPromiseCapability
 *
 * @return {PromiseCapability} A capability object contains:
 * - a Promise, resolve and reject methods.
 */
function createPromiseCapability() {
  var capability = {};
  capability.promise = new Promise(function (resolve, reject) {
    capability.resolve = resolve;
    capability.reject = reject;
  });
  return capability;
}

PDFJS.createPromiseCapability = createPromiseCapability;

/**
 * Polyfill for Promises:
 * The following promise implementation tries to generally implement the
 * Promise/A+ spec. Some notable differences from other promise libaries are:
 * - There currently isn't a seperate deferred and promise object.
 * - Unhandled rejections eventually show an error if they aren't handled.
 *
 * Based off of the work in:
 * https://bugzilla.mozilla.org/show_bug.cgi?id=810490
 */
(function PromiseClosure() {
  if (globalScope.Promise) {
    // Promises existing in the DOM/Worker, checking presence of all/resolve
    if (typeof globalScope.Promise.all !== 'function') {
      globalScope.Promise.all = function (iterable) {
        var count = 0, results = [], resolve, reject;
        var promise = new globalScope.Promise(function (resolve_, reject_) {
          resolve = resolve_;
          reject = reject_;
        });
        iterable.forEach(function (p, i) {
          count++;
          p.then(function (result) {
            results[i] = result;
            count--;
            if (count === 0) {
              resolve(results);
            }
          }, reject);
        });
        if (count === 0) {
          resolve(results);
        }
        return promise;
      };
    }
    if (typeof globalScope.Promise.resolve !== 'function') {
      globalScope.Promise.resolve = function (value) {
        return new globalScope.Promise(function (resolve) { resolve(value); });
      };
    }
    if (typeof globalScope.Promise.reject !== 'function') {
      globalScope.Promise.reject = function (reason) {
        return new globalScope.Promise(function (resolve, reject) {
          reject(reason);
        });
      };
    }
    if (typeof globalScope.Promise.prototype.catch !== 'function') {
      globalScope.Promise.prototype.catch = function (onReject) {
        return globalScope.Promise.prototype.then(undefined, onReject);
      };
    }
    return;
  }
  var STATUS_PENDING = 0;
  var STATUS_RESOLVED = 1;
  var STATUS_REJECTED = 2;

  // In an attempt to avoid silent exceptions, unhandled rejections are
  // tracked and if they aren't handled in a certain amount of time an
  // error is logged.
  var REJECTION_TIMEOUT = 500;

  var HandlerManager = {
    handlers: [],
    running: false,
    unhandledRejections: [],
    pendingRejectionCheck: false,

    scheduleHandlers: function scheduleHandlers(promise) {
      if (promise._status === STATUS_PENDING) {
        return;
      }

      this.handlers = this.handlers.concat(promise._handlers);
      promise._handlers = [];

      if (this.running) {
        return;
      }
      this.running = true;

      setTimeout(this.runHandlers.bind(this), 0);
    },

    runHandlers: function runHandlers() {
      var RUN_TIMEOUT = 1; // ms
      var timeoutAt = Date.now() + RUN_TIMEOUT;
      while (this.handlers.length > 0) {
        var handler = this.handlers.shift();

        var nextStatus = handler.thisPromise._status;
        var nextValue = handler.thisPromise._value;

        try {
          if (nextStatus === STATUS_RESOLVED) {
            if (typeof handler.onResolve === 'function') {
              nextValue = handler.onResolve(nextValue);
            }
          } else if (typeof handler.onReject === 'function') {
              nextValue = handler.onReject(nextValue);
              nextStatus = STATUS_RESOLVED;

              if (handler.thisPromise._unhandledRejection) {
                this.removeUnhandeledRejection(handler.thisPromise);
              }
          }
        } catch (ex) {
          nextStatus = STATUS_REJECTED;
          nextValue = ex;
        }

        handler.nextPromise._updateStatus(nextStatus, nextValue);
        if (Date.now() >= timeoutAt) {
          break;
        }
      }

      if (this.handlers.length > 0) {
        setTimeout(this.runHandlers.bind(this), 0);
        return;
      }

      this.running = false;
    },

    addUnhandledRejection: function addUnhandledRejection(promise) {
      this.unhandledRejections.push({
        promise: promise,
        time: Date.now()
      });
      this.scheduleRejectionCheck();
    },

    removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
      promise._unhandledRejection = false;
      for (var i = 0; i < this.unhandledRejections.length; i++) {
        if (this.unhandledRejections[i].promise === promise) {
          this.unhandledRejections.splice(i);
          i--;
        }
      }
    },

    scheduleRejectionCheck: function scheduleRejectionCheck() {
      if (this.pendingRejectionCheck) {
        return;
      }
      this.pendingRejectionCheck = true;
      setTimeout(function rejectionCheck() {
        this.pendingRejectionCheck = false;
        var now = Date.now();
        for (var i = 0; i < this.unhandledRejections.length; i++) {
          if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
            var unhandled = this.unhandledRejections[i].promise._value;
            var msg = 'Unhandled rejection: ' + unhandled;
            if (unhandled.stack) {
              msg += '\n' + unhandled.stack;
            }
            warn(msg);
            this.unhandledRejections.splice(i);
            i--;
          }
        }
        if (this.unhandledRejections.length) {
          this.scheduleRejectionCheck();
        }
      }.bind(this), REJECTION_TIMEOUT);
    }
  };

  function Promise(resolver) {
    this._status = STATUS_PENDING;
    this._handlers = [];
    try {
      resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
    } catch (e) {
      this._reject(e);
    }
  }
  /**
   * Builds a promise that is resolved when all the passed in promises are
   * resolved.
   * @param {array} array of data and/or promises to wait for.
   * @return {Promise} New dependant promise.
   */
  Promise.all = function Promise_all(promises) {
    var resolveAll, rejectAll;
    var deferred = new Promise(function (resolve, reject) {
      resolveAll = resolve;
      rejectAll = reject;
    });
    var unresolved = promises.length;
    var results = [];
    if (unresolved === 0) {
      resolveAll(results);
      return deferred;
    }
    function reject(reason) {
      if (deferred._status === STATUS_REJECTED) {
        return;
      }
      results = [];
      rejectAll(reason);
    }
    for (var i = 0, ii = promises.length; i < ii; ++i) {
      var promise = promises[i];
      var resolve = (function(i) {
        return function(value) {
          if (deferred._status === STATUS_REJECTED) {
            return;
          }
          results[i] = value;
          unresolved--;
          if (unresolved === 0) {
            resolveAll(results);
          }
        };
      })(i);
      if (Promise.isPromise(promise)) {
        promise.then(resolve, reject);
      } else {
        resolve(promise);
      }
    }
    return deferred;
  };

  /**
   * Checks if the value is likely a promise (has a 'then' function).
   * @return {boolean} true if value is thenable
   */
  Promise.isPromise = function Promise_isPromise(value) {
    return value && typeof value.then === 'function';
  };

  /**
   * Creates resolved promise
   * @param value resolve value
   * @returns {Promise}
   */
  Promise.resolve = function Promise_resolve(value) {
    return new Promise(function (resolve) { resolve(value); });
  };

  /**
   * Creates rejected promise
   * @param reason rejection value
   * @returns {Promise}
   */
  Promise.reject = function Promise_reject(reason) {
    return new Promise(function (resolve, reject) { reject(reason); });
  };

  Promise.prototype = {
    _status: null,
    _value: null,
    _handlers: null,
    _unhandledRejection: null,

    _updateStatus: function Promise__updateStatus(status, value) {
      if (this._status === STATUS_RESOLVED ||
          this._status === STATUS_REJECTED) {
        return;
      }

      if (status === STATUS_RESOLVED &&
          Promise.isPromise(value)) {
        value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
                   this._updateStatus.bind(this, STATUS_REJECTED));
        return;
      }

      this._status = status;
      this._value = value;

      if (status === STATUS_REJECTED && this._handlers.length === 0) {
        this._unhandledRejection = true;
        HandlerManager.addUnhandledRejection(this);
      }

      HandlerManager.scheduleHandlers(this);
    },

    _resolve: function Promise_resolve(value) {
      this._updateStatus(STATUS_RESOLVED, value);
    },

    _reject: function Promise_reject(reason) {
      this._updateStatus(STATUS_REJECTED, reason);
    },

    then: function Promise_then(onResolve, onReject) {
      var nextPromise = new Promise(function (resolve, reject) {
        this.resolve = resolve;
        this.reject = reject;
      });
      this._handlers.push({
        thisPromise: this,
        onResolve: onResolve,
        onReject: onReject,
        nextPromise: nextPromise
      });
      HandlerManager.scheduleHandlers(this);
      return nextPromise;
    },

    catch: function Promise_catch(onReject) {
      return this.then(undefined, onReject);
    }
  };

  globalScope.Promise = Promise;
})();

var StatTimer = (function StatTimerClosure() {
  function rpad(str, pad, length) {
    while (str.length < length) {
      str += pad;
    }
    return str;
  }
  function StatTimer() {
    this.started = {};
    this.times = [];
    this.enabled = true;
  }
  StatTimer.prototype = {
    time: function StatTimer_time(name) {
      if (!this.enabled) {
        return;
      }
      if (name in this.started) {
        warn('Timer is already running for ' + name);
      }
      this.started[name] = Date.now();
    },
    timeEnd: function StatTimer_timeEnd(name) {
      if (!this.enabled) {
        return;
      }
      if (!(name in this.started)) {
        warn('Timer has not been started for ' + name);
      }
      this.times.push({
        'name': name,
        'start': this.started[name],
        'end': Date.now()
      });
      // Remove timer from started so it can be called again.
      delete this.started[name];
    },
    toString: function StatTimer_toString() {
      var i, ii;
      var times = this.times;
      var out = '';
      // Find the longest name for padding purposes.
      var longest = 0;
      for (i = 0, ii = times.length; i < ii; ++i) {
        var name = times[i]['name'];
        if (name.length > longest) {
          longest = name.length;
        }
      }
      for (i = 0, ii = times.length; i < ii; ++i) {
        var span = times[i];
        var duration = span.end - span.start;
        out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
      }
      return out;
    }
  };
  return StatTimer;
})();

PDFJS.createBlob = function createBlob(data, contentType) {
  if (typeof Blob !== 'undefined') {
    return new Blob([data], { type: contentType });
  }
  // Blob builder is deprecated in FF14 and removed in FF18.
  var bb = new MozBlobBuilder();
  bb.append(data);
  return bb.getBlob(contentType);
};

PDFJS.createObjectURL = (function createObjectURLClosure() {
  // Blob/createObjectURL is not available, falling back to data schema.
  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

  return function createObjectURL(data, contentType) {
    if (!PDFJS.disableCreateObjectURL &&
        typeof URL !== 'undefined' && URL.createObjectURL) {
      var blob = PDFJS.createBlob(data, contentType);
      return URL.createObjectURL(blob);
    }

    var buffer = 'data:' + contentType + ';base64,';
    for (var i = 0, ii = data.length; i < ii; i += 3) {
      var b1 = data[i] & 0xFF;
      var b2 = data[i + 1] & 0xFF;
      var b3 = data[i + 2] & 0xFF;
      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
      var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
      var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
      buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
    }
    return buffer;
  };
})();

function MessageHandler(name, comObj) {
  this.name = name;
  this.comObj = comObj;
  this.callbackIndex = 1;
  this.postMessageTransfers = true;
  var callbacksCapabilities = this.callbacksCapabilities = {};
  var ah = this.actionHandler = {};

  ah['console_log'] = [function ahConsoleLog(data) {
    console.log.apply(console, data);
  }];
  ah['console_error'] = [function ahConsoleError(data) {
    console.error.apply(console, data);
  }];
  ah['_unsupported_feature'] = [function ah_unsupportedFeature(data) {
    UnsupportedManager.notify(data);
  }];

  comObj.onmessage = function messageHandlerComObjOnMessage(event) {
    var data = event.data;
    if (data.isReply) {
      var callbackId = data.callbackId;
      if (data.callbackId in callbacksCapabilities) {
        var callback = callbacksCapabilities[callbackId];
        delete callbacksCapabilities[callbackId];
        if ('error' in data) {
          callback.reject(data.error);
        } else {
          callback.resolve(data.data);
        }
      } else {
        error('Cannot resolve callback ' + callbackId);
      }
    } else if (data.action in ah) {
      var action = ah[data.action];
      if (data.callbackId) {
        Promise.resolve().then(function () {
          return action[0].call(action[1], data.data);
        }).then(function (result) {
          comObj.postMessage({
            isReply: true,
            callbackId: data.callbackId,
            data: result
          });
        }, function (reason) {
          comObj.postMessage({
            isReply: true,
            callbackId: data.callbackId,
            error: reason
          });
        });
      } else {
        action[0].call(action[1], data.data);
      }
    } else {
      error('Unknown action from worker: ' + data.action);
    }
  };
}

MessageHandler.prototype = {
  on: function messageHandlerOn(actionName, handler, scope) {
    var ah = this.actionHandler;
    if (ah[actionName]) {
      error('There is already an actionName called "' + actionName + '"');
    }
    ah[actionName] = [handler, scope];
  },
  /**
   * Sends a message to the comObj to invoke the action with the supplied data.
   * @param {String} actionName Action to call.
   * @param {JSON} data JSON data to send.
   * @param {Array} [transfers] Optional list of transfers/ArrayBuffers
   */
  send: function messageHandlerSend(actionName, data, transfers) {
    var message = {
      action: actionName,
      data: data
    };
//      console.log(preved);
    this.postMessage(message, transfers);
  },
  /**
   * Sends a message to the comObj to invoke the action with the supplied data.
   * Expects that other side will callback with the response.
   * @param {String} actionName Action to call.
   * @param {JSON} data JSON data to send.
   * @param {Array} [transfers] Optional list of transfers/ArrayBuffers.
   * @returns {Promise} Promise to be resolved with response data.
   */
  sendWithPromise:
    function messageHandlerSendWithPromise(actionName, data, transfers) {
    var callbackId = this.callbackIndex++;
    var message = {
      action: actionName,
      data: data,
      callbackId: callbackId
    };
    var capability = createPromiseCapability();
    this.callbacksCapabilities[callbackId] = capability;
    try {
      this.postMessage(message, transfers);
    } catch (e) {
      capability.reject(e);
    }
    return capability.promise;
  },
  /**
   * Sends raw message to the comObj.
   * @private
   * @param message {Object} Raw message.
   * @param transfers List of transfers/ArrayBuffers, or undefined.
   */
  postMessage: function (message, transfers) {
//      console.log(this.comObj, message, transfers);
    if (transfers && this.postMessageTransfers) {
      this.comObj.postMessage(message, transfers);
    } else {
      this.comObj.postMessage(message);
    }
  }
};

function loadJpegStream(id, imageUrl, objs) {
  var img = new Image();
  img.onload = (function loadJpegStream_onloadClosure() {
    objs.resolve(id, img);
  });
  img.onerror = (function loadJpegStream_onerrorClosure() {
    objs.resolve(id, null);
    warn('Error during JPEG image loading');
  });
  img.src = imageUrl;
}


/**
 * The maximum allowed image size in total pixels e.g. width * height. Images
 * above this value will not be drawn. Use -1 for no limit.
 * @var {number}
 */
PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
                      -1 : PDFJS.maxImageSize);

/**
 * The url of where the predefined Adobe CMaps are located. Include trailing
 * slash.
 * @var {string}
 */
PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);

/**
 * Specifies if CMaps are binary packed.
 * @var {boolean}
 */
PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;

/**
 * By default fonts are converted to OpenType fonts and loaded via font face
 * rules. If disabled, the font will be rendered using a built in font renderer
 * that constructs the glyphs with primitive path commands.
 * @var {boolean}
 */
PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
                         false : PDFJS.disableFontFace);

/**
 * Path for image resources, mainly for annotation icons. Include trailing
 * slash.
 * @var {string}
 */
PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
                            '' : PDFJS.imageResourcesPath);

/**
 * Disable the web worker and run all code on the main thread. This will happen
 * automatically if the browser doesn't support workers or sending typed arrays
 * to workers.
 * @var {boolean}
 */
PDFJS.disableWorker = (PDFJS.disableWorker === undefined ?
                       false : PDFJS.disableWorker);

/**
 * Path and filename of the worker file. Required when the worker is enabled in
 * development mode. If unspecified in the production build, the worker will be
 * loaded based on the location of the pdf.js file.
 * @var {string}
 */
PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);

/**
 * Disable range request loading of PDF files. When enabled and if the server
 * supports partial content requests then the PDF will be fetched in chunks.
 * Enabled (false) by default.
 * @var {boolean}
 */
PDFJS.disableRange = (PDFJS.disableRange === undefined ?
                      false : PDFJS.disableRange);

/**
 * Disable streaming of PDF file data. By default PDF.js attempts to load PDF
 * in chunks. This default behavior can be disabled.
 * @var {boolean}
 */
PDFJS.disableStream = (PDFJS.disableStream === undefined ?
                       false : PDFJS.disableStream);

/**
 * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
 * will automatically keep fetching more data even if it isn't needed to display
 * the current page. This default behavior can be disabled.
 *
 * NOTE: It is also necessary to disable streaming, see above,
 *       in order for disabling of pre-fetching to work correctly.
 * @var {boolean}
 */
PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
                          false : PDFJS.disableAutoFetch);

/**
 * Enables special hooks for debugging PDF.js.
 * @var {boolean}
 */
PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);

/**
 * Enables transfer usage in postMessage for ArrayBuffers.
 * @var {boolean}
 */
PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
                              true : PDFJS.postMessageTransfers);

/**
 * Disables URL.createObjectURL usage.
 * @var {boolean}
 */
PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
                                false : PDFJS.disableCreateObjectURL);

/**
 * Disables WebGL usage.
 * @var {boolean}
 */
PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
                      true : PDFJS.disableWebGL);

/**
 * Disables fullscreen support, and by extension Presentation Mode,
 * in browsers which support the fullscreen API.
 * @var {boolean}
 */
PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?
                           false : PDFJS.disableFullscreen);

/**
 * Enables CSS only zooming.
 * @var {boolean}
 */
PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ?
                        false : PDFJS.useOnlyCssZoom);

/**
 * Controls the logging level.
 * The constants from PDFJS.VERBOSITY_LEVELS should be used:
 * - errors
 * - warnings [default]
 * - infos
 * @var {number}
 */
PDFJS.verbosity = (PDFJS.verbosity === undefined ?
                   PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);

/**
 * The maximum supported canvas size in total pixels e.g. width * height.
 * The default value is 4096 * 4096. Use -1 for no limit.
 * @var {number}
 */
PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
                         16777216 : PDFJS.maxCanvasPixels);

/**
 * Opens external links in a new window if enabled. The default behavior opens
 * external links in the PDF.js window.
 * @var {boolean}
 */
PDFJS.openExternalLinksInNewWindow = (
  PDFJS.openExternalLinksInNewWindow === undefined ?
    false : PDFJS.openExternalLinksInNewWindow);

/**
 * Document initialization / loading parameters object.
 *
 * @typedef {Object} DocumentInitParameters
 * @property {string}     url   - The URL of the PDF.
 * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
 *   (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
 *   use atob() to convert it to a binary string first.
 * @property {Object}     httpHeaders - Basic authentication headers.
 * @property {boolean}    withCredentials - Indicates whether or not cross-site
 *   Access-Control requests should be made using credentials such as cookies
 *   or authorization headers. The default is false.
 * @property {string}     password - For decrypting password-protected PDFs.
 * @property {TypedArray} initialData - A typed array with the first portion or
 *   all of the pdf data. Used by the extension since some data is already
 *   loaded before the switch to range requests.
 * @property {number}     length - The PDF file length. It's used for progress
 *   reports and range requests operations.
 * @property {PDFDataRangeTransport} range
 */

/**
 * @typedef {Object} PDFDocumentStats
 * @property {Array} streamTypes - Used stream types in the document (an item
 *   is set to true if specific stream ID was used in the document).
 * @property {Array} fontTypes - Used font type in the document (an item is set
 *   to true if specific font ID was used in the document).
 */

/**
 * This is the main entry point for loading a PDF and interacting with it.
 * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
 * is used, which means it must follow the same origin rules that any XHR does
 * e.g. No cross domain requests without CORS.
 *
 * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
 * Can be a url to where a PDF is located, a typed array (Uint8Array)
 * already populated with data or parameter object.
 *
 * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
 * if you want to manually serve range requests for data in the PDF.
 *
 * @param {function} passwordCallback (deprecated) It is used to request a
 * password if wrong or no password was provided. The callback receives two
 * parameters: function that needs to be called with new password and reason
 * (see {PasswordResponses}).
 *
 * @param {function} progressCallback (deprecated) It is used to be able to
 * monitor the loading progress of the PDF file (necessary to implement e.g.
 * a loading bar). The callback receives an {Object} with the properties:
 * {number} loaded and {number} total.
 *
 * @return {PDFDocumentLoadingTask}
 */
PDFJS.getDocument = function getDocument(src,
                                         pdfDataRangeTransport,
                                         passwordCallback,
                                         progressCallback) {
  var task = new PDFDocumentLoadingTask();

  // Support of the obsolete arguments (for compatibility with API v1.0)
  if (pdfDataRangeTransport) {
    if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
      // Not a PDFDataRangeTransport instance, trying to add missing properties.
      pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
      pdfDataRangeTransport.length = src.length;
      pdfDataRangeTransport.initialData = src.initialData;
    }
    src = Object.create(src);
    src.range = pdfDataRangeTransport;
  }

  task.onPassword = passwordCallback || null;
  task.onProgress = progressCallback || null;

  var workerInitializedCapability, transport;
  var source;
  if (typeof src === 'string') {
    source = { url: src };
  } else if (isArrayBuffer(src)) {
    source = { data: src };
  } else if (src instanceof PDFDataRangeTransport) {
    source = { range: src };
  } else {
    if (typeof src !== 'object') {
      error('Invalid parameter in getDocument, need either Uint8Array, ' +
        'string or a parameter object');
    }
    if (!src.url && !src.data && !src.range) {
      error('Invalid parameter object: need either .data, .range or .url');
    }

    source = src;
  }


  var params = {};
  for (var key in source) {
    if (key === 'url' && typeof window !== 'undefined') {
      // The full path is required in the 'url' field.
      params[key] = combineUrl(window.location.href, source[key]);
      continue;
    } else if (key === 'range') {
      continue;
    } else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
      // Converting string or array-like data to Uint8Array.
      var pdfBytes = source[key];
      if (typeof pdfBytes === 'string') {
        params[key] = stringToBytes(pdfBytes);
      } else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
                 !isNaN(pdfBytes.length)) {
        params[key] = new Uint8Array(pdfBytes);
      } else {
        error('Invalid PDF binary data: either typed array, string or ' +
              'array-like object is expected in the data property.');
      }
      continue;
    }
    params[key] = source[key];

  }
  workerInitializedCapability = createPromiseCapability();
  transport = new WorkerTransport(workerInitializedCapability, source.range);
  workerInitializedCapability.promise.then(function transportInitialized() {
    transport.fetchDocument(task, params);
  });

  return task;
};

/**
 * PDF document loading operation.
 * @class
 */
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
  /** @constructs PDFDocumentLoadingTask */
  function PDFDocumentLoadingTask() {
    this._capability = createPromiseCapability();

    /**
     * Callback to request a password if wrong or no password was provided.
     * The callback receives two parameters: function that needs to be called
     * with new password and reason (see {PasswordResponses}).
     */
    this.onPassword = null;

    /**
     * Callback to be able to monitor the loading progress of the PDF file
     * (necessary to implement e.g. a loading bar). The callback receives
     * an {Object} with the properties: {number} loaded and {number} total.
     */
    this.onProgress = null;
  }

  PDFDocumentLoadingTask.prototype =
      /** @lends PDFDocumentLoadingTask.prototype */ {
    /**
     * @return {Promise}
     */
    get promise() {
      return this._capability.promise;
    },

    // TODO add cancel or abort method

    /**
     * Registers callbacks to indicate the document loading completion.
     *
     * @param {function} onFulfilled The callback for the loading completion.
     * @param {function} onRejected The callback for the loading failure.
     * @return {Promise} A promise that is resolved after the onFulfilled or
     *                   onRejected callback.
     */
    then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
      return this.promise.then.apply(this.promise, arguments);
    }
  };

  return PDFDocumentLoadingTask;
})();

/**
 * Abstract class to support range requests file loading.
 * @class
 */
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
  /**
   * @constructs PDFDataRangeTransport
   * @param {number} length
   * @param {Uint8Array} initialData
   */
  function PDFDataRangeTransport(length, initialData) {
    this.length = length;
    this.initialData = initialData;

    this._rangeListeners = [];
    this._progressListeners = [];
    this._progressiveReadListeners = [];
    this._readyCapability = createPromiseCapability();
  }
  PDFDataRangeTransport.prototype =
      /** @lends PDFDataRangeTransport.prototype */ {
    addRangeListener:
        function PDFDataRangeTransport_addRangeListener(listener) {
      this._rangeListeners.push(listener);
    },

    addProgressListener:
        function PDFDataRangeTransport_addProgressListener(listener) {
      this._progressListeners.push(listener);
    },

    addProgressiveReadListener:
        function PDFDataRangeTransport_addProgressiveReadListener(listener) {
      this._progressiveReadListeners.push(listener);
    },

    onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
      var listeners = this._rangeListeners;
      for (var i = 0, n = listeners.length; i < n; ++i) {
        listeners[i](begin, chunk);
      }
    },

    onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
      this._readyCapability.promise.then(function () {
        var listeners = this._progressListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](loaded);
        }
      }.bind(this));
    },

    onDataProgressiveRead:
        function PDFDataRangeTransport_onDataProgress(chunk) {
      this._readyCapability.promise.then(function () {
        var listeners = this._progressiveReadListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](chunk);
        }
      }.bind(this));
    },

    transportReady: function PDFDataRangeTransport_transportReady() {
      this._readyCapability.resolve();
    },

    requestDataRange:
        function PDFDataRangeTransport_requestDataRange(begin, end) {
      throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
    }
  };
  return PDFDataRangeTransport;
})();

PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;

/**
 * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
 * properties that can be read synchronously.
 * @class
 */
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
  function PDFDocumentProxy(pdfInfo, transport) {
    this.pdfInfo = pdfInfo;
    this.transport = transport;
  }
  PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
    /**
     * @return {number} Total number of pages the PDF contains.
     */
    get numPages() {
      return this.pdfInfo.numPages;
    },
    /**
     * @return {string} A unique ID to identify a PDF. Not guaranteed to be
     * unique.
     */
    get fingerprint() {
      return this.pdfInfo.fingerprint;
    },
    /**
     * @param {number} pageNumber The page number to get. The first page is 1.
     * @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
     * object.
     */
    getPage: function PDFDocumentProxy_getPage(pageNumber) {
      return this.transport.getPage(pageNumber);
    },
    /**
     * @param {{num: number, gen: number}} ref The page reference. Must have
     *   the 'num' and 'gen' properties.
     * @return {Promise} A promise that is resolved with the page index that is
     * associated with the reference.
     */
    getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
      return this.transport.getPageIndex(ref);
    },
    /**
     * @return {Promise} A promise that is resolved with a lookup table for
     * mapping named destinations to reference numbers.
     *
     * This can be slow for large documents: use getDestination instead
     */
    getDestinations: function PDFDocumentProxy_getDestinations() {
      return this.transport.getDestinations();
    },
    /**
     * @param {string} id The named destination to get.
     * @return {Promise} A promise that is resolved with all information
     * of the given named destination.
     */
    getDestination: function PDFDocumentProxy_getDestination(id) {
      return this.transport.getDestination(id);
    },
    /**
     * @return {Promise} A promise that is resolved with a lookup table for
     * mapping named attachments to their content.
     */
    getAttachments: function PDFDocumentProxy_getAttachments() {
      return this.transport.getAttachments();
    },
    /**
     * @return {Promise} A promise that is resolved with an array of all the
     * JavaScript strings in the name tree.
     */
    getJavaScript: function PDFDocumentProxy_getJavaScript() {
      return this.transport.getJavaScript();
    },
    /**
     * @return {Promise} A promise that is resolved with an {Array} that is a
     * tree outline (if it has one) of the PDF. The tree is in the format of:
     * [
     *  {
     *   title: string,
     *   bold: boolean,
     *   italic: boolean,
     *   color: rgb array,
     *   dest: dest obj,
     *   items: array of more items like this
     *  },
     *  ...
     * ].
     */
    getOutline: function PDFDocumentProxy_getOutline() {
      return this.transport.getOutline();
    },
    /**
     * @return {Promise} A promise that is resolved with an {Object} that has
     * info and metadata properties.  Info is an {Object} filled with anything
     * available in the information dictionary and similarly metadata is a
     * {Metadata} object with information from the metadata section of the PDF.
     */
    getMetadata: function PDFDocumentProxy_getMetadata() {
      return this.transport.getMetadata();
    },
    /**
     * @return {Promise} A promise that is resolved with a TypedArray that has
     * the raw data from the PDF.
     */
    getData: function PDFDocumentProxy_getData() {
      return this.transport.getData();
    },
    /**
     * @return {Promise} A promise that is resolved when the document's data
     * is loaded. It is resolved with an {Object} that contains the length
     * property that indicates size of the PDF data in bytes.
     */
    getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
      return this.transport.downloadInfoCapability.promise;
    },
    /**
     * @return {Promise} A promise this is resolved with current stats about
     * document structures (see {@link PDFDocumentStats}).
     */
    getStats: function PDFDocumentProxy_getStats() {
      return this.transport.getStats();
    },
    /**
     * Cleans up resources allocated by the document, e.g. created @font-face.
     */
    cleanup: function PDFDocumentProxy_cleanup() {
      this.transport.startCleanup();
    },
    /**
     * Destroys current document instance and terminates worker.
     */
    destroy: function PDFDocumentProxy_destroy() {
      this.transport.destroy();
    }
  };
  return PDFDocumentProxy;
})();

/**
 * Page text content.
 *
 * @typedef {Object} TextContent
 * @property {array} items - array of {@link TextItem}
 * @property {Object} styles - {@link TextStyles} objects, indexed by font
 *                    name.
 */

/**
 * Page text content part.
 *
 * @typedef {Object} TextItem
 * @property {string} str - text content.
 * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
 * @property {array} transform - transformation matrix.
 * @property {number} width - width in device space.
 * @property {number} height - height in device space.
 * @property {string} fontName - font name used by pdf.js for converted font.
 */

/**
 * Text style.
 *
 * @typedef {Object} TextStyle
 * @property {number} ascent - font ascent.
 * @property {number} descent - font descent.
 * @property {boolean} vertical - text is in vertical mode.
 * @property {string} fontFamily - possible font family
 */

/**
 * Page render parameters.
 *
 * @typedef {Object} RenderParameters
 * @property {Object} canvasContext - A 2D context of a DOM Canvas object.
 * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by
 *                                calling of PDFPage.getViewport method.
 * @property {string} intent - Rendering intent, can be 'display' or 'print'
 *                    (default value is 'display').
 * @property {Object} imageLayer - (optional) An object that has beginLayout,
 *                    endLayout and appendImage functions.
 * @property {function} continueCallback - (deprecated) A function that will be
 *                      called each time the rendering is paused.  To continue
 *                      rendering call the function that is the first argument
 *                      to the callback.
 */

/**
 * PDF page operator list.
 *
 * @typedef {Object} PDFOperatorList
 * @property {Array} fnArray - Array containing the operator functions.
 * @property {Array} argsArray - Array containing the arguments of the
 *                               functions.
 */

/**
 * Proxy to a PDFPage in the worker thread.
 * @class
 */
var PDFPageProxy = (function PDFPageProxyClosure() {
  function PDFPageProxy(pageIndex, pageInfo, transport) {
    this.pageIndex = pageIndex;
    this.pageInfo = pageInfo;
    this.transport = transport;
    this.stats = new StatTimer();
    this.stats.enabled = !!globalScope.PDFJS.enableStats;
    this.commonObjs = transport.commonObjs;
    this.objs = new PDFObjects();
    this.cleanupAfterRender = false;
    this.pendingDestroy = false;
    this.intentStates = {};
  }
  PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
    /**
     * @return {number} Page number of the page. First page is 1.
     */
    get pageNumber() {
      return this.pageIndex + 1;
    },
    /**
     * @return {number} The number of degrees the page is rotated clockwise.
     */
    get rotate() {
      return this.pageInfo.rotate;
    },
    /**
     * @return {Object} The reference that points to this page. It has 'num' and
     * 'gen' properties.
     */
    get ref() {
      return this.pageInfo.ref;
    },
    /**
     * @return {Array} An array of the visible portion of the PDF page in the
     * user space units - [x1, y1, x2, y2].
     */
    get view() {
      return this.pageInfo.view;
    },
    /**
     * @param {number} scale The desired scale of the viewport.
     * @param {number} rotate Degrees to rotate the viewport. If omitted this
     * defaults to the page rotation.
     * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties
     * along with transforms required for rendering.
     */
    getViewport: function PDFPageProxy_getViewport(scale, rotate) {
      if (arguments.length < 2) {
        rotate = this.rotate;
      }
      return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
    },
    /**
     * @return {Promise} A promise that is resolved with an {Array} of the
     * annotation objects.
     */
    getAnnotations: function PDFPageProxy_getAnnotations() {
      if (this.annotationsPromise) {
        return this.annotationsPromise;
      }

      var promise = this.transport.getAnnotations(this.pageIndex);
      this.annotationsPromise = promise;
      return promise;
    },
    /**
     * Begins the process of rendering a page to the desired context.
     * @param {RenderParameters} params Page render parameters.
     * @return {RenderTask} An object that contains the promise, which
     *                      is resolved when the page finishes rendering.
     */
    render: function PDFPageProxy_render(params) {
      var stats = this.stats;
      stats.time('Overall');

      // If there was a pending destroy cancel it so no cleanup happens during
      // this call to render.
      this.pendingDestroy = false;

      var renderingIntent = (params.intent === 'print' ? 'print' : 'display');

      if (!this.intentStates[renderingIntent]) {
        this.intentStates[renderingIntent] = {};
      }
      var intentState = this.intentStates[renderingIntent];

      // If there's no displayReadyCapability yet, then the operatorList
      // was never requested before. Make the request and create the promise.
      if (!intentState.displayReadyCapability) {
        intentState.receivingOperatorList = true;
        intentState.displayReadyCapability = createPromiseCapability();
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };

        this.stats.time('Page Request');
        this.transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageNumber - 1,
          intent: renderingIntent
        });
      }

      var internalRenderTask = new InternalRenderTask(complete, params,
                                                      this.objs,
                                                      this.commonObjs,
                                                      intentState.operatorList,
                                                      this.pageNumber);
      internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
      if (!intentState.renderTasks) {
        intentState.renderTasks = [];
      }
      intentState.renderTasks.push(internalRenderTask);
      var renderTask = internalRenderTask.task;

      // Obsolete parameter support
      if (params.continueCallback) {
        renderTask.onContinue = params.continueCallback;
      }

      var self = this;
      intentState.displayReadyCapability.promise.then(
        function pageDisplayReadyPromise(transparency) {
          if (self.pendingDestroy) {
            complete();
            return;
          }
          stats.time('Rendering');
          internalRenderTask.initalizeGraphics(transparency);
          internalRenderTask.operatorListChanged();
        },
        function pageDisplayReadPromiseError(reason) {
          complete(reason);
        }
      );

      function complete(error) {
        var i = intentState.renderTasks.indexOf(internalRenderTask);
        if (i >= 0) {
          intentState.renderTasks.splice(i, 1);
        }

        if (self.cleanupAfterRender) {
          self.pendingDestroy = true;
        }
        self._tryDestroy();

        if (error) {
          internalRenderTask.capability.reject(error);
        } else {
          internalRenderTask.capability.resolve();
        }
        stats.timeEnd('Rendering');
        stats.timeEnd('Overall');
      }

      return renderTask;
    },

    /**
     * @return {Promise} A promise resolved with an {@link PDFOperatorList}
     * object that represents page's operator list.
     */
    getOperatorList: function PDFPageProxy_getOperatorList() {
      function operatorListChanged() {
        if (intentState.operatorList.lastChunk) {
          intentState.opListReadCapability.resolve(intentState.operatorList);
        }
      }

      var renderingIntent = 'oplist';
      if (!this.intentStates[renderingIntent]) {
        this.intentStates[renderingIntent] = {};
      }
      var intentState = this.intentStates[renderingIntent];

      if (!intentState.opListReadCapability) {
        var opListTask = {};
        opListTask.operatorListChanged = operatorListChanged;
        intentState.receivingOperatorList = true;
        intentState.opListReadCapability = createPromiseCapability();
        intentState.renderTasks = [];
        intentState.renderTasks.push(opListTask);
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };

        this.transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageIndex,
          intent: renderingIntent
        });
      }
      return intentState.opListReadCapability.promise;
    },

    /**
     * @return {Promise} That is resolved a {@link TextContent}
     * object that represent the page text content.
     */
    getTextContent: function PDFPageProxy_getTextContent() {
      return this.transport.messageHandler.sendWithPromise('GetTextContent', {
        pageIndex: this.pageNumber - 1
      });
    },
    /**
     * Destroys resources allocated by the page.
     */
    destroy: function PDFPageProxy_destroy() {
      this.pendingDestroy = true;
      this._tryDestroy();
    },
    /**
     * For internal use only. Attempts to clean up if rendering is in a state
     * where that's possible.
     * @ignore
     */
    _tryDestroy: function PDFPageProxy__destroy() {
      if (!this.pendingDestroy ||
          Object.keys(this.intentStates).some(function(intent) {
            var intentState = this.intentStates[intent];
            return (intentState.renderTasks.length !== 0 ||
                    intentState.receivingOperatorList);
          }, this)) {
        return;
      }

      Object.keys(this.intentStates).forEach(function(intent) {
        delete this.intentStates[intent];
      }, this);
      this.objs.clear();
      this.annotationsPromise = null;
      this.pendingDestroy = false;
    },
    /**
     * For internal use only.
     * @ignore
     */
    _startRenderPage: function PDFPageProxy_startRenderPage(transparency,
                                                            intent) {
      var intentState = this.intentStates[intent];
      // TODO Refactor RenderPageRequest to separate rendering
      // and operator list logic
      if (intentState.displayReadyCapability) {
        intentState.displayReadyCapability.resolve(transparency);
      }
    },
    /**
     * For internal use only.
     * @ignore
     */
    _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
                                                            intent) {
      var intentState = this.intentStates[intent];
      var i, ii;
      // Add the new chunk to the current operator list.
      for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
        intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
        intentState.operatorList.argsArray.push(
          operatorListChunk.argsArray[i]);
      }
      intentState.operatorList.lastChunk = operatorListChunk.lastChunk;

      // Notify all the rendering tasks there are more operators to be consumed.
      for (i = 0; i < intentState.renderTasks.length; i++) {
        intentState.renderTasks[i].operatorListChanged();
      }

      if (operatorListChunk.lastChunk) {
        intentState.receivingOperatorList = false;
        this._tryDestroy();
      }
    }
  };
  return PDFPageProxy;
})();

/**
 * For internal use only.
 * @ignore
 */
var WorkerTransport = (function WorkerTransportClosure() {
  function WorkerTransport(workerInitializedCapability, pdfDataRangeTransport) {
    this.pdfDataRangeTransport = pdfDataRangeTransport;
    this.workerInitializedCapability = workerInitializedCapability;
    this.commonObjs = new PDFObjects();

    this.loadingTask = null;

    this.pageCache = [];
    this.pagePromises = [];
    this.downloadInfoCapability = createPromiseCapability();

    // If worker support isn't disabled explicit and the browser has worker
    // support, create a new web worker and test if it/the browser fullfills
    // all requirements to run parts of pdf.js in a web worker.
    // Right now, the requirement is, that an Uint8Array is still an Uint8Array
    // as it arrives on the worker. Chrome added this with version 15.
    if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
      var workerSrc = PDFJS.workerSrc;
      if (!workerSrc) {
        error('No PDFJS.workerSrc specified');
      }

      try {
        // Some versions of FF can't create a worker on localhost, see:
        // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
        var worker = new Worker(workerSrc);
        var messageHandler = new MessageHandler('main', worker);
        this.messageHandler = messageHandler;

        messageHandler.on('test', function transportTest(data) {
          var supportTypedArray = data && data.supportTypedArray;
          if (supportTypedArray) {
            this.worker = worker;
            if (!data.supportTransfers) {
              PDFJS.postMessageTransfers = false;
            }
            this.setupMessageHandler(messageHandler);
            workerInitializedCapability.resolve();
          } else {
            this.setupFakeWorker();
          }
        }.bind(this));

        var testObj = new Uint8Array([PDFJS.postMessageTransfers ? 255 : 0]);
        // Some versions of Opera throw a DATA_CLONE_ERR on serializing the
        // typed array. Also, checking if we can use transfers.
        try {
          messageHandler.send('test', testObj, [testObj.buffer]);
        } catch (ex) {
          info('Cannot use postMessage transfers');
          testObj[0] = 0;
          messageHandler.send('test', testObj);
        }
        return;
      } catch (e) {
        info('The worker has been disabled.');
      }
    }
    // Either workers are disabled, not supported or have thrown an exception.
    // Thus, we fallback to a faked worker.
    this.setupFakeWorker();
  }
  WorkerTransport.prototype = {
    destroy: function WorkerTransport_destroy() {
      this.pageCache = [];
      this.pagePromises = [];
      var self = this;
      this.messageHandler.sendWithPromise('Terminate', null).then(function () {
        FontLoader.clear();
        if (self.worker) {
          self.worker.terminate();
        }
      });
    },

    setupFakeWorker: function WorkerTransport_setupFakeWorker() {
      globalScope.PDFJS.disableWorker = true;

      if (!PDFJS.fakeWorkerFilesLoadedCapability) {
        PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability();
        // In the developer build load worker_loader which in turn loads all the
        // other files and resolves the promise. In production only the
        // pdf.worker.js file is needed.
        Util.loadScript(PDFJS.workerSrc, function() {
          PDFJS.fakeWorkerFilesLoadedCapability.resolve();
        });
      }
      PDFJS.fakeWorkerFilesLoadedCapability.promise.then(function () {
        warn('Setting up fake worker.');
        // If we don't use a worker, just post/sendMessage to the main thread.
        var fakeWorker = {
          postMessage: function WorkerTransport_postMessage(obj) {
            fakeWorker.onmessage({data: obj});
          },
          terminate: function WorkerTransport_terminate() {}
        };

        var messageHandler = new MessageHandler('main', fakeWorker);
        this.setupMessageHandler(messageHandler);

        // If the main thread is our worker, setup the handling for the messages
        // the main thread sends to it self.
        PDFJS.WorkerMessageHandler.setup(messageHandler);

        this.workerInitializedCapability.resolve();
      }.bind(this));
    },

    setupMessageHandler:
      function WorkerTransport_setupMessageHandler(messageHandler) {
      this.messageHandler = messageHandler;

      function updatePassword(password) {
        messageHandler.send('UpdatePassword', password);
      }

      var pdfDataRangeTransport = this.pdfDataRangeTransport;
      if (pdfDataRangeTransport) {
        pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
          messageHandler.send('OnDataRange', {
            begin: begin,
            chunk: chunk
          });
        });

        pdfDataRangeTransport.addProgressListener(function(loaded) {
          messageHandler.send('OnDataProgress', {
            loaded: loaded
          });
        });

        pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
          messageHandler.send('OnDataRange', {
            chunk: chunk
          });
        });

        messageHandler.on('RequestDataRange',
          function transportDataRange(data) {
            pdfDataRangeTransport.requestDataRange(data.begin, data.end);
          }, this);
      }

      messageHandler.on('GetDoc', function transportDoc(data) {
        var pdfInfo = data.pdfInfo;
        this.numPages = data.pdfInfo.numPages;
        var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
        this.pdfDocument = pdfDocument;
        this.loadingTask._capability.resolve(pdfDocument);
      }, this);

      messageHandler.on('NeedPassword',
                        function transportNeedPassword(exception) {
        var loadingTask = this.loadingTask;
        if (loadingTask.onPassword) {
          return loadingTask.onPassword(updatePassword,
                                        PasswordResponses.NEED_PASSWORD);
        }
        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

      messageHandler.on('IncorrectPassword',
                        function transportIncorrectPassword(exception) {
        var loadingTask = this.loadingTask;
        if (loadingTask.onPassword) {
          return loadingTask.onPassword(updatePassword,
                                        PasswordResponses.INCORRECT_PASSWORD);
        }
        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

      messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
        this.loadingTask._capability.reject(
          new InvalidPDFException(exception.message));
      }, this);

      messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
        this.loadingTask._capability.reject(
          new MissingPDFException(exception.message));
      }, this);

      messageHandler.on('UnexpectedResponse',
                        function transportUnexpectedResponse(exception) {
        this.loadingTask._capability.reject(
          new UnexpectedResponseException(exception.message, exception.status));
      }, this);

      messageHandler.on('UnknownError',
                        function transportUnknownError(exception) {
        this.loadingTask._capability.reject(
          new UnknownErrorException(exception.message, exception.details));
      }, this);

      messageHandler.on('DataLoaded', function transportPage(data) {
        this.downloadInfoCapability.resolve(data);
      }, this);

      messageHandler.on('PDFManagerReady', function transportPage(data) {
        if (this.pdfDataRangeTransport) {
          this.pdfDataRangeTransport.transportReady();
        }
      }, this);

      messageHandler.on('StartRenderPage', function transportRender(data) {
        var page = this.pageCache[data.pageIndex];

        page.stats.timeEnd('Page Request');
        page._startRenderPage(data.transparency, data.intent);
      }, this);

      messageHandler.on('RenderPageChunk', function transportRender(data) {
        var page = this.pageCache[data.pageIndex];

        page._renderPageChunk(data.operatorList, data.intent);
      }, this);

      messageHandler.on('commonobj', function transportObj(data) {
        var id = data[0];
        var type = data[1];
        if (this.commonObjs.hasData(id)) {
          return;
        }

        switch (type) {
          case 'Font':
            var exportedData = data[2];

            var font;
            if ('error' in exportedData) {
              var error = exportedData.error;
              warn('Error during font loading: ' + error);
              this.commonObjs.resolve(id, error);
              break;
            } else {
              font = new FontFaceObject(exportedData);
            }

            FontLoader.bind(
              [font],
              function fontReady(fontObjs) {
                this.commonObjs.resolve(id, font);
              }.bind(this)
            );
            break;
          case 'FontPath':
            this.commonObjs.resolve(id, data[2]);
            break;
          default:
            error('Got unknown common object type ' + type);
        }
      }, this);

      messageHandler.on('obj', function transportObj(data) {
        var id = data[0];
        var pageIndex = data[1];
        var type = data[2];
        var pageProxy = this.pageCache[pageIndex];
        var imageData;
        if (pageProxy.objs.hasData(id)) {
          return;
        }

        switch (type) {
          case 'JpegStream':
            imageData = data[3];
            loadJpegStream(id, imageData, pageProxy.objs);
            break;
          case 'Image':
            imageData = data[3];
            pageProxy.objs.resolve(id, imageData);

            // heuristics that will allow not to store large data
            var MAX_IMAGE_SIZE_TO_STORE = 8000000;
            if (imageData && 'data' in imageData &&
                imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
              pageProxy.cleanupAfterRender = true;
            }
            break;
          default:
            error('Got unknown object type ' + type);
        }
      }, this);

      messageHandler.on('DocProgress', function transportDocProgress(data) {
        var loadingTask = this.loadingTask;
        if (loadingTask.onProgress) {
          loadingTask.onProgress({
            loaded: data.loaded,
            total: data.total
          });
        }
      }, this);

      messageHandler.on('PageError', function transportError(data) {
        var page = this.pageCache[data.pageNum - 1];
        var intentState = page.intentStates[data.intent];
        if (intentState.displayReadyCapability) {
          intentState.displayReadyCapability.reject(data.error);
        } else {
          error(data.error);
        }
      }, this);

      messageHandler.on('JpegDecode', function(data) {
        var imageUrl = data[0];
        var components = data[1];
        if (components !== 3 && components !== 1) {
          return Promise.reject(
            new Error('Only 3 components or 1 component can be returned'));
        }

        return new Promise(function (resolve, reject) {
          var img = new Image();
          img.onload = function () {
            var width = img.width;
            var height = img.height;
            var size = width * height;
            var rgbaLength = size * 4;
            var buf = new Uint8Array(size * components);
            var tmpCanvas = createScratchCanvas(width, height);
            var tmpCtx = tmpCanvas.getContext('2d');
            tmpCtx.drawImage(img, 0, 0);
            var data = tmpCtx.getImageData(0, 0, width, height).data;
            var i, j;

            if (components === 3) {
              for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
                buf[j] = data[i];
                buf[j + 1] = data[i + 1];
                buf[j + 2] = data[i + 2];
              }
            } else if (components === 1) {
              for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
                buf[j] = data[i];
              }
            }
            resolve({ data: buf, width: width, height: height});
          };
          img.onerror = function () {
            reject(new Error('JpegDecode failed to load image'));
          };
          img.src = imageUrl;
        });
      });
    },

    fetchDocument: function WorkerTransport_fetchDocument(loadingTask, source) {
      this.loadingTask = loadingTask;

      source.disableAutoFetch = PDFJS.disableAutoFetch;
      source.disableStream = PDFJS.disableStream;
      source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
      if (this.pdfDataRangeTransport) {
        source.length = this.pdfDataRangeTransport.length;
        source.initialData = this.pdfDataRangeTransport.initialData;
      };
      this.messageHandler.send('GetDocRequest', {
        source: source,
        disableRange: PDFJS.disableRange,
        maxImageSize: PDFJS.maxImageSize,
        cMapUrl: PDFJS.cMapUrl,
        cMapPacked: PDFJS.cMapPacked,
        disableFontFace: PDFJS.disableFontFace,
        disableCreateObjectURL: PDFJS.disableCreateObjectURL,
        verbosity: PDFJS.verbosity
      });
    },

    getData: function WorkerTransport_getData() {
      return this.messageHandler.sendWithPromise('GetData', null);
    },

    getPage: function WorkerTransport_getPage(pageNumber, capability) {
      if (pageNumber <= 0 || pageNumber > this.numPages ||
          (pageNumber|0) !== pageNumber) {
        return Promise.reject(new Error('Invalid page request'));
      }

      var pageIndex = pageNumber - 1;
      if (pageIndex in this.pagePromises) {
        return this.pagePromises[pageIndex];
      }
      var promise = this.messageHandler.sendWithPromise('GetPage', {
        pageIndex: pageIndex
      }).then(function (pageInfo) {
        var page = new PDFPageProxy(pageIndex, pageInfo, this);
        this.pageCache[pageIndex] = page;
        return page;
      }.bind(this));
      this.pagePromises[pageIndex] = promise;
      return promise;
    },

    getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
      return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref });
    },

    getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
      return this.messageHandler.sendWithPromise('GetAnnotations',
        { pageIndex: pageIndex });
    },

    getDestinations: function WorkerTransport_getDestinations() {
      return this.messageHandler.sendWithPromise('GetDestinations', null);
    },

    getDestination: function WorkerTransport_getDestination(id) {
      return this.messageHandler.sendWithPromise('GetDestination', { id: id } );
    },

    getAttachments: function WorkerTransport_getAttachments() {
      return this.messageHandler.sendWithPromise('GetAttachments', null);
    },

    getJavaScript: function WorkerTransport_getJavaScript() {
      return this.messageHandler.sendWithPromise('GetJavaScript', null);
    },

    getOutline: function WorkerTransport_getOutline() {
      return this.messageHandler.sendWithPromise('GetOutline', null);
    },

    getMetadata: function WorkerTransport_getMetadata() {
      return this.messageHandler.sendWithPromise('GetMetadata', null).
        then(function transportMetadata(results) {
        return {
          info: results[0],
          metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null)
        };
      });
    },

    getStats: function WorkerTransport_getStats() {
      return this.messageHandler.sendWithPromise('GetStats', null);
    },

    startCleanup: function WorkerTransport_startCleanup() {
      this.messageHandler.sendWithPromise('Cleanup', null).
        then(function endCleanup() {
        for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
          var page = this.pageCache[i];
          if (page) {
            page.destroy();
          }
        }
        this.commonObjs.clear();
        FontLoader.clear();
      }.bind(this));
    }
  };
  return WorkerTransport;

})();

/**
 * A PDF document and page is built of many objects. E.g. there are objects
 * for fonts, images, rendering code and such. These objects might get processed
 * inside of a worker. The `PDFObjects` implements some basic functions to
 * manage these objects.
 * @ignore
 */
var PDFObjects = (function PDFObjectsClosure() {
  function PDFObjects() {
    this.objs = {};
  }

  PDFObjects.prototype = {
    /**
     * Internal function.
     * Ensures there is an object defined for `objId`.
     */
    ensureObj: function PDFObjects_ensureObj(objId) {
      if (this.objs[objId]) {
        return this.objs[objId];
      }

      var obj = {
        capability: createPromiseCapability(),
        data: null,
        resolved: false
      };
      this.objs[objId] = obj;

      return obj;
    },

    /**
     * If called *without* callback, this returns the data of `objId` but the
     * object needs to be resolved. If it isn't, this function throws.
     *
     * If called *with* a callback, the callback is called with the data of the
     * object once the object is resolved. That means, if you call this
     * function and the object is already resolved, the callback gets called
     * right away.
     */
    get: function PDFObjects_get(objId, callback) {
      // If there is a callback, then the get can be async and the object is
      // not required to be resolved right now
      if (callback) {
        this.ensureObj(objId).capability.promise.then(callback);
        return null;
      }

      // If there isn't a callback, the user expects to get the resolved data
      // directly.
      var obj = this.objs[objId];

      // If there isn't an object yet or the object isn't resolved, then the
      // data isn't ready yet!
      if (!obj || !obj.resolved) {
        error('Requesting object that isn\'t resolved yet ' + objId);
      }

      return obj.data;
    },

    /**
     * Resolves the object `objId` with optional `data`.
     */
    resolve: function PDFObjects_resolve(objId, data) {
      var obj = this.ensureObj(objId);

      obj.resolved = true;
      obj.data = data;
      obj.capability.resolve(data);
    },

    isResolved: function PDFObjects_isResolved(objId) {
      var objs = this.objs;

      if (!objs[objId]) {
        return false;
      } else {
        return objs[objId].resolved;
      }
    },

    hasData: function PDFObjects_hasData(objId) {
      return this.isResolved(objId);
    },

    /**
     * Returns the data of `objId` if object exists, null otherwise.
     */
    getData: function PDFObjects_getData(objId) {
      var objs = this.objs;
      if (!objs[objId] || !objs[objId].resolved) {
        return null;
      } else {
        return objs[objId].data;
      }
    },

    clear: function PDFObjects_clear() {
      this.objs = {};
    }
  };
  return PDFObjects;
})();

/**
 * Allows controlling of the rendering tasks.
 * @class
 */
var RenderTask = (function RenderTaskClosure() {
  function RenderTask(internalRenderTask) {
    this._internalRenderTask = internalRenderTask;

    /**
     * Callback for incremental rendering -- a function that will be called
     * each time the rendering is paused.  To continue rendering call the
     * function that is the first argument to the callback.
     * @type {function}
     */
    this.onContinue = null;
  }

  RenderTask.prototype = /** @lends RenderTask.prototype */ {
    /**
     * Promise for rendering task completion.
     * @return {Promise}
     */
    get promise() {
      return this._internalRenderTask.capability.promise;
    },

    /**
     * Cancels the rendering task. If the task is currently rendering it will
     * not be cancelled until graphics pauses with a timeout. The promise that
     * this object extends will resolved when cancelled.
     */
    cancel: function RenderTask_cancel() {
      this._internalRenderTask.cancel();
    },

    /**
     * Registers callbacks to indicate the rendering task completion.
     *
     * @param {function} onFulfilled The callback for the rendering completion.
     * @param {function} onRejected The callback for the rendering failure.
     * @return {Promise} A promise that is resolved after the onFulfilled or
     *                   onRejected callback.
     */
    then: function RenderTask_then(onFulfilled, onRejected) {
      return this.promise.then.apply(this.promise, arguments);
    }
  };

  return RenderTask;
})();

/**
 * For internal use only.
 * @ignore
 */
var InternalRenderTask = (function InternalRenderTaskClosure() {

  function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
                              pageNumber) {
    this.callback = callback;
    this.params = params;
    this.objs = objs;
    this.commonObjs = commonObjs;
    this.operatorListIdx = null;
    this.operatorList = operatorList;
    this.pageNumber = pageNumber;
    this.running = false;
    this.graphicsReadyCallback = null;
    this.graphicsReady = false;
    this.useRequestAnimationFrame = false;
    this.cancelled = false;
    this.capability = createPromiseCapability();
    this.task = new RenderTask(this);
    // caching this-bound methods
    this._continueBound = this._continue.bind(this);
    this._scheduleNextBound = this._scheduleNext.bind(this);
    this._nextBound = this._next.bind(this);
  }

  InternalRenderTask.prototype = {

    initalizeGraphics:
        function InternalRenderTask_initalizeGraphics(transparency) {

      if (this.cancelled) {
        return;
      }
      if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
          globalScope.StepperManager.enabled) {
        this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
        this.stepper.init(this.operatorList);
        this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
      }

      var params = this.params;
      this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
                                    this.objs, params.imageLayer);

      this.gfx.beginDrawing(params.viewport, transparency);
      this.operatorListIdx = 0;
      this.graphicsReady = true;
      if (this.graphicsReadyCallback) {
        this.graphicsReadyCallback();
      }
    },

    cancel: function InternalRenderTask_cancel() {
      this.running = false;
      this.cancelled = true;
      this.callback('cancelled');
    },

    operatorListChanged: function InternalRenderTask_operatorListChanged() {
      if (!this.graphicsReady) {
        if (!this.graphicsReadyCallback) {
          this.graphicsReadyCallback = this._continueBound;
        }
        return;
      }

      if (this.stepper) {
        this.stepper.updateOperatorList(this.operatorList);
      }

      if (this.running) {
        return;
      }
      this._continue();
    },

    _continue: function InternalRenderTask__continue() {
      this.running = true;
      if (this.cancelled) {
        return;
      }
      if (this.task.onContinue) {
        this.task.onContinue.call(this.task, this._scheduleNextBound);
      } else {
        this._scheduleNext();
      }
    },

    _scheduleNext: function InternalRenderTask__scheduleNext() {
      if (this.useRequestAnimationFrame) {
        window.requestAnimationFrame(this._nextBound);
      } else {
        Promise.resolve(undefined).then(this._nextBound);
      }
    },

    _next: function InternalRenderTask__next() {
      if (this.cancelled) {
        return;
      }
      this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
                                        this.operatorListIdx,
                                        this._continueBound,
                                        this.stepper);
      if (this.operatorListIdx === this.operatorList.argsArray.length) {
        this.running = false;
        if (this.operatorList.lastChunk) {
          this.gfx.endDrawing();
          this.callback();
        }
      }
    }

  };

  return InternalRenderTask;
})();


var Metadata = PDFJS.Metadata = (function MetadataClosure() {
  function fixMetadata(meta) {
    return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) {
      var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g,
                                function(code, d1, d2, d3) {
        return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);
      });
      var chars = '';
      for (var i = 0; i < bytes.length; i += 2) {
        var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);
        chars += code >= 32 && code < 127 && code !== 60 && code !== 62 &&
          code !== 38 && false ? String.fromCharCode(code) :
          '&#x' + (0x10000 + code).toString(16).substring(1) + ';';
      }
      return '>' + chars;
    });
  }

  function Metadata(meta) {
    if (typeof meta === 'string') {
      // Ghostscript produces invalid metadata
      meta = fixMetadata(meta);

      var parser = new DOMParser();
      meta = parser.parseFromString(meta, 'application/xml');
    } else if (!(meta instanceof Document)) {
      error('Metadata: Invalid metadata object');
    }

    this.metaDocument = meta;
    this.metadata = {};
    this.parse();
  }

  Metadata.prototype = {
    parse: function Metadata_parse() {
      var doc = this.metaDocument;
      var rdf = doc.documentElement;

      if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
        rdf = rdf.firstChild;
        while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') {
          rdf = rdf.nextSibling;
        }
      }

      var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
      if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) {
        return;
      }

      var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;
      for (i = 0, length = children.length; i < length; i++) {
        desc = children[i];
        if (desc.nodeName.toLowerCase() !== 'rdf:description') {
          continue;
        }

        for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
          if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
            entry = desc.childNodes[ii];
            name = entry.nodeName.toLowerCase();
            this.metadata[name] = entry.textContent.trim();
          }
        }
      }
    },

    get: function Metadata_get(name) {
      return this.metadata[name] || null;
    },

    has: function Metadata_has(name) {
      return typeof this.metadata[name] !== 'undefined';
    }
  };

  return Metadata;
})();


// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.

// Minimal font size that would be used during canvas fillText operations.
var MIN_FONT_SIZE = 16;
// Maximum font size that would be used during canvas fillText operations.
var MAX_FONT_SIZE = 100;
var MAX_GROUP_SIZE = 4096;

// Heuristic value used when enforcing minimum line widths.
var MIN_WIDTH_FACTOR = 0.65;

var COMPILE_TYPE3_GLYPHS = true;
var MAX_SIZE_TO_COMPILE = 1000;

var FULL_CHUNK_HEIGHT = 16;

function createScratchCanvas(width, height) {
  var canvas = document.createElement('canvas');
  canvas.width = width;
  canvas.height = height;
  return canvas;
}

function addContextCurrentTransform(ctx) {
  // If the context doesn't expose a `mozCurrentTransform`, add a JS based one.
  if (!ctx.mozCurrentTransform) {
    ctx._originalSave = ctx.save;
    ctx._originalRestore = ctx.restore;
    ctx._originalRotate = ctx.rotate;
    ctx._originalScale = ctx.scale;
    ctx._originalTranslate = ctx.translate;
    ctx._originalTransform = ctx.transform;
    ctx._originalSetTransform = ctx.setTransform;

    ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];
    ctx._transformStack = [];

    Object.defineProperty(ctx, 'mozCurrentTransform', {
      get: function getCurrentTransform() {
        return this._transformMatrix;
      }
    });

    Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
      get: function getCurrentTransformInverse() {
        // Calculation done using WolframAlpha:
        // http://www.wolframalpha.com/input/?
        //   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}

        var m = this._transformMatrix;
        var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];

        var ad_bc = a * d - b * c;
        var bc_ad = b * c - a * d;

        return [
          d / ad_bc,
          b / bc_ad,
          c / bc_ad,
          a / ad_bc,
          (d * e - c * f) / bc_ad,
          (b * e - a * f) / ad_bc
        ];
      }
    });

    ctx.save = function ctxSave() {
      var old = this._transformMatrix;
      this._transformStack.push(old);
      this._transformMatrix = old.slice(0, 6);

      this._originalSave();
    };

    ctx.restore = function ctxRestore() {
      var prev = this._transformStack.pop();
      if (prev) {
        this._transformMatrix = prev;
        this._originalRestore();
      }
    };

    ctx.translate = function ctxTranslate(x, y) {
      var m = this._transformMatrix;
      m[4] = m[0] * x + m[2] * y + m[4];
      m[5] = m[1] * x + m[3] * y + m[5];

      this._originalTranslate(x, y);
    };

    ctx.scale = function ctxScale(x, y) {
      var m = this._transformMatrix;
      m[0] = m[0] * x;
      m[1] = m[1] * x;
      m[2] = m[2] * y;
      m[3] = m[3] * y;

      this._originalScale(x, y);
    };

    ctx.transform = function ctxTransform(a, b, c, d, e, f) {
      var m = this._transformMatrix;
      this._transformMatrix = [
        m[0] * a + m[2] * b,
        m[1] * a + m[3] * b,
        m[0] * c + m[2] * d,
        m[1] * c + m[3] * d,
        m[0] * e + m[2] * f + m[4],
        m[1] * e + m[3] * f + m[5]
      ];

      ctx._originalTransform(a, b, c, d, e, f);
    };

    ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
      this._transformMatrix = [a, b, c, d, e, f];

      ctx._originalSetTransform(a, b, c, d, e, f);
    };

    ctx.rotate = function ctxRotate(angle) {
      var cosValue = Math.cos(angle);
      var sinValue = Math.sin(angle);

      var m = this._transformMatrix;
      this._transformMatrix = [
        m[0] * cosValue + m[2] * sinValue,
        m[1] * cosValue + m[3] * sinValue,
        m[0] * (-sinValue) + m[2] * cosValue,
        m[1] * (-sinValue) + m[3] * cosValue,
        m[4],
        m[5]
      ];

      this._originalRotate(angle);
    };
  }
}

var CachedCanvases = (function CachedCanvasesClosure() {
  var cache = {};
  return {
    getCanvas: function CachedCanvases_getCanvas(id, width, height,
                                                 trackTransform) {
      var canvasEntry;
      if (cache[id] !== undefined) {
        canvasEntry = cache[id];
        canvasEntry.canvas.width = width;
        canvasEntry.canvas.height = height;
        // reset canvas transform for emulated mozCurrentTransform, if needed
        canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);
      } else {
        var canvas = createScratchCanvas(width, height);
        var ctx = canvas.getContext('2d');
        if (trackTransform) {
          addContextCurrentTransform(ctx);
        }
        cache[id] = canvasEntry = {canvas: canvas, context: ctx};
      }
      return canvasEntry;
    },
    clear: function () {
      for (var id in cache) {
        var canvasEntry = cache[id];
        // Zeroing the width and height causes Firefox to release graphics
        // resources immediately, which can greatly reduce memory consumption.
        canvasEntry.canvas.width = 0;
        canvasEntry.canvas.height = 0;
        delete cache[id];
      }
    }
  };
})();

function compileType3Glyph(imgData) {
  var POINT_TO_PROCESS_LIMIT = 1000;

  var width = imgData.width, height = imgData.height;
  var i, j, j0, width1 = width + 1;
  var points = new Uint8Array(width1 * (height + 1));
  var POINT_TYPES =
      new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);

  // decodes bit-packed mask data
  var lineSize = (width + 7) & ~7, data0 = imgData.data;
  var data = new Uint8Array(lineSize * height), pos = 0, ii;
  for (i = 0, ii = data0.length; i < ii; i++) {
    var mask = 128, elem = data0[i];
    while (mask > 0) {
      data[pos++] = (elem & mask) ? 0 : 255;
      mask >>= 1;
    }
  }

  // finding iteresting points: every point is located between mask pixels,
  // so there will be points of the (width + 1)x(height + 1) grid. Every point
  // will have flags assigned based on neighboring mask pixels:
  //   4 | 8
  //   --P--
  //   2 | 1
  // We are interested only in points with the flags:
  //   - outside corners: 1, 2, 4, 8;
  //   - inside corners: 7, 11, 13, 14;
  //   - and, intersections: 5, 10.
  var count = 0;
  pos = 0;
  if (data[pos] !== 0) {
    points[0] = 1;
    ++count;
  }
  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j] = data[pos] ? 2 : 1;
      ++count;
    }
    pos++;
  }
  if (data[pos] !== 0) {
    points[j] = 2;
    ++count;
  }
  for (i = 1; i < height; i++) {
    pos = i * lineSize;
    j0 = i * width1;
    if (data[pos - lineSize] !== data[pos]) {
      points[j0] = data[pos] ? 1 : 8;
      ++count;
    }
    // 'sum' is the position of the current pixel configuration in the 'TYPES'
    // array (in order 8-1-2-4, so we can use '>>2' to shift the column).
    var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
    for (j = 1; j < width; j++) {
      sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) +
            (data[pos - lineSize + 1] ? 8 : 0);
      if (POINT_TYPES[sum]) {
        points[j0 + j] = POINT_TYPES[sum];
        ++count;
      }
      pos++;
    }
    if (data[pos - lineSize] !== data[pos]) {
      points[j0 + j] = data[pos] ? 2 : 4;
      ++count;
    }

    if (count > POINT_TO_PROCESS_LIMIT) {
      return null;
    }
  }

  pos = lineSize * (height - 1);
  j0 = i * width1;
  if (data[pos] !== 0) {
    points[j0] = 8;
    ++count;
  }
  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j0 + j] = data[pos] ? 4 : 8;
      ++count;
    }
    pos++;
  }
  if (data[pos] !== 0) {
    points[j0 + j] = 4;
    ++count;
  }
  if (count > POINT_TO_PROCESS_LIMIT) {
    return null;
  }

  // building outlines
  var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
  var outlines = [];
  for (i = 0; count && i <= height; i++) {
    var p = i * width1;
    var end = p + width;
    while (p < end && !points[p]) {
      p++;
    }
    if (p === end) {
      continue;
    }
    var coords = [p % width1, i];

    var type = points[p], p0 = p, pp;
    do {
      var step = steps[type];
      do {
        p += step;
      } while (!points[p]);

      pp = points[p];
      if (pp !== 5 && pp !== 10) {
        // set new direction
        type = pp;
        // delete mark
        points[p] = 0;
      } else { // type is 5 or 10, ie, a crossing
        // set new direction
        type = pp & ((0x33 * type) >> 4);
        // set new type for "future hit"
        points[p] &= (type >> 2 | type << 2);
      }

      coords.push(p % width1);
      coords.push((p / width1) | 0);
      --count;
    } while (p0 !== p);
    outlines.push(coords);
    --i;
  }

  var drawOutline = function(c) {
    c.save();
    // the path shall be painted in [0..1]x[0..1] space
    c.scale(1 / width, -1 / height);
    c.translate(0, -height);
    c.beginPath();
    for (var i = 0, ii = outlines.length; i < ii; i++) {
      var o = outlines[i];
      c.moveTo(o[0], o[1]);
      for (var j = 2, jj = o.length; j < jj; j += 2) {
        c.lineTo(o[j], o[j+1]);
      }
    }
    c.fill();
    c.beginPath();
    c.restore();
  };

  return drawOutline;
}

var CanvasExtraState = (function CanvasExtraStateClosure() {
  function CanvasExtraState(old) {
    // Are soft masks and alpha values shapes or opacities?
    this.alphaIsShape = false;
    this.fontSize = 0;
    this.fontSizeScale = 1;
    this.textMatrix = IDENTITY_MATRIX;
    this.textMatrixScale = 1;
    this.fontMatrix = FONT_IDENTITY_MATRIX;
    this.leading = 0;
    // Current point (in user coordinates)
    this.x = 0;
    this.y = 0;
    // Start of text line (in text coordinates)
    this.lineX = 0;
    this.lineY = 0;
    // Character and word spacing
    this.charSpacing = 0;
    this.wordSpacing = 0;
    this.textHScale = 1;
    this.textRenderingMode = TextRenderingMode.FILL;
    this.textRise = 0;
    // Default fore and background colors
    this.fillColor = '#000000';
    this.strokeColor = '#000000';
    this.patternFill = false;
    // Note: fill alpha applies to all non-stroking operations
    this.fillAlpha = 1;
    this.strokeAlpha = 1;
    this.lineWidth = 1;
    this.activeSMask = null; // nonclonable field (see the save method below)

    this.old = old;
  }

  CanvasExtraState.prototype = {
    clone: function CanvasExtraState_clone() {
      return Object.create(this);
    },
    setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
      this.x = x;
      this.y = y;
    }
  };
  return CanvasExtraState;
})();

var CanvasGraphics = (function CanvasGraphicsClosure() {
  // Defines the time the executeOperatorList is going to be executing
  // before it stops and shedules a continue of execution.
  var EXECUTION_TIME = 15;
  // Defines the number of steps before checking the execution time
  var EXECUTION_STEPS = 10;

  function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) {
    this.ctx = canvasCtx;
    this.current = new CanvasExtraState();
    this.stateStack = [];
    this.pendingClip = null;
    this.pendingEOFill = false;
    this.res = null;
    this.xobjs = null;
    this.commonObjs = commonObjs;
    this.objs = objs;
    this.imageLayer = imageLayer;
    this.groupStack = [];
    this.processingType3 = null;
    // Patterns are painted relative to the initial page/form transform, see pdf
    // spec 8.7.2 NOTE 1.
    this.baseTransform = null;
    this.baseTransformStack = [];
    this.groupLevel = 0;
    this.smaskStack = [];
    this.smaskCounter = 0;
    this.tempSMask = null;
    if (canvasCtx) {
      // NOTE: if mozCurrentTransform is polyfilled, then the current state of
      // the transformation must already be set in canvasCtx._transformMatrix.
      addContextCurrentTransform(canvasCtx);
    }
    this.cachedGetSinglePixelWidth = null;
  }

  function putBinaryImageData(ctx, imgData) {
    if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
      ctx.putImageData(imgData, 0, 0);
      return;
    }

    // Put the image data to the canvas in chunks, rather than putting the
    // whole image at once.  This saves JS memory, because the ImageData object
    // is smaller. It also possibly saves C++ memory within the implementation
    // of putImageData(). (E.g. in Firefox we make two short-lived copies of
    // the data passed to putImageData()). |n| shouldn't be too small, however,
    // because too many putImageData() calls will slow things down.
    //
    // Note: as written, if the last chunk is partial, the putImageData() call
    // will (conceptually) put pixels past the bounds of the canvas.  But
    // that's ok; any such pixels are ignored.

    var height = imgData.height, width = imgData.width;
    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;

    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
    var srcPos = 0, destPos;
    var src = imgData.data;
    var dest = chunkImgData.data;
    var i, j, thisChunkHeight, elemsInThisChunk;

    // There are multiple forms in which the pixel data can be passed, and
    // imgData.kind tells us which one this is.
    if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {
      // Grayscale, 1 bit per pixel (i.e. black-and-white).
      var srcLength = src.byteLength;
      var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) :
        new Uint32ArrayView(dest);
      var dest32DataLength = dest32.length;
      var fullSrcDiff = (width + 7) >> 3;
      var white = 0xFFFFFFFF;
      var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ?
        0xFF000000 : 0x000000FF;
      for (i = 0; i < totalChunks; i++) {
        thisChunkHeight =
          (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;
        destPos = 0;
        for (j = 0; j < thisChunkHeight; j++) {
          var srcDiff = srcLength - srcPos;
          var k = 0;
          var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7;
          var kEndUnrolled = kEnd & ~7;
          var mask = 0;
          var srcByte = 0;
          for (; k < kEndUnrolled; k += 8) {
            srcByte = src[srcPos++];
            dest32[destPos++] = (srcByte & 128) ? white : black;
            dest32[destPos++] = (srcByte & 64) ? white : black;
            dest32[destPos++] = (srcByte & 32) ? white : black;
            dest32[destPos++] = (srcByte & 16) ? white : black;
            dest32[destPos++] = (srcByte & 8) ? white : black;
            dest32[destPos++] = (srcByte & 4) ? white : black;
            dest32[destPos++] = (srcByte & 2) ? white : black;
            dest32[destPos++] = (srcByte & 1) ? white : black;
          }
          for (; k < kEnd; k++) {
             if (mask === 0) {
               srcByte = src[srcPos++];
               mask = 128;
             }

            dest32[destPos++] = (srcByte & mask) ? white : black;
            mask >>= 1;
          }
        }
        // We ran out of input. Make all remaining pixels transparent.
        while (destPos < dest32DataLength) {
          dest32[destPos++] = 0;
        }

        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
      }
    } else if (imgData.kind === ImageKind.RGBA_32BPP) {
      // RGBA, 32-bits per pixel.

      j = 0;
      elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;
      for (i = 0; i < fullChunks; i++) {
        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
        srcPos += elemsInThisChunk;

        ctx.putImageData(chunkImgData, 0, j);
        j += FULL_CHUNK_HEIGHT;
      }
      if (i < totalChunks) {
        elemsInThisChunk = width * partialChunkHeight * 4;
        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
        ctx.putImageData(chunkImgData, 0, j);
      }

    } else if (imgData.kind === ImageKind.RGB_24BPP) {
      // RGB, 24-bits per pixel.
      thisChunkHeight = FULL_CHUNK_HEIGHT;
      elemsInThisChunk = width * thisChunkHeight;
      for (i = 0; i < totalChunks; i++) {
        if (i >= fullChunks) {
          thisChunkHeight = partialChunkHeight;
          elemsInThisChunk = width * thisChunkHeight;
        }

        destPos = 0;
        for (j = elemsInThisChunk; j--;) {
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = 255;
        }
        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
      }
    } else {
      error('bad image kind: ' + imgData.kind);
    }
  }

  function putBinaryImageMask(ctx, imgData) {
    var height = imgData.height, width = imgData.width;
    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;

    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
    var srcPos = 0;
    var src = imgData.data;
    var dest = chunkImgData.data;

    for (var i = 0; i < totalChunks; i++) {
      var thisChunkHeight =
        (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;

      // Expand the mask so it can be used by the canvas.  Any required
      // inversion has already been handled.
      var destPos = 3; // alpha component offset
      for (var j = 0; j < thisChunkHeight; j++) {
        var mask = 0;
        for (var k = 0; k < width; k++) {
          if (!mask) {
            var elem = src[srcPos++];
            mask = 128;
          }
          dest[destPos] = (elem & mask) ? 0 : 255;
          destPos += 4;
          mask >>= 1;
        }
      }
      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
    }
  }

  function copyCtxState(sourceCtx, destCtx) {
    var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha',
                      'lineWidth', 'lineCap', 'lineJoin', 'miterLimit',
                      'globalCompositeOperation', 'font'];
    for (var i = 0, ii = properties.length; i < ii; i++) {
      var property = properties[i];
      if (sourceCtx[property] !== undefined) {
        destCtx[property] = sourceCtx[property];
      }
    }
    if (sourceCtx.setLineDash !== undefined) {
      destCtx.setLineDash(sourceCtx.getLineDash());
      destCtx.lineDashOffset =  sourceCtx.lineDashOffset;
    } else if (sourceCtx.mozDashOffset !== undefined) {
      destCtx.mozDash = sourceCtx.mozDash;
      destCtx.mozDashOffset = sourceCtx.mozDashOffset;
    }
  }

  function composeSMaskBackdrop(bytes, r0, g0, b0) {
    var length = bytes.length;
    for (var i = 3; i < length; i += 4) {
      var alpha = bytes[i];
      if (alpha === 0) {
        bytes[i - 3] = r0;
        bytes[i - 2] = g0;
        bytes[i - 1] = b0;
      } else if (alpha < 255) {
        var alpha_ = 255 - alpha;
        bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8;
        bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8;
        bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8;
      }
    }
  }

  function composeSMaskAlpha(maskData, layerData) {
    var length = maskData.length;
    var scale = 1 / 255;
    for (var i = 3; i < length; i += 4) {
      var alpha = maskData[i];
      layerData[i] = (layerData[i] * alpha * scale) | 0;
    }
  }

  function composeSMaskLuminosity(maskData, layerData) {
    var length = maskData.length;
    for (var i = 3; i < length; i += 4) {
      var y = (maskData[i - 3] * 77) +  // * 0.3 / 255 * 0x10000
              (maskData[i - 2] * 152) + // * 0.59 ....
              (maskData[i - 1] * 28);   // * 0.11 ....
      layerData[i] = (layerData[i] * y) >> 16;
    }
  }

  function genericComposeSMask(maskCtx, layerCtx, width, height,
                               subtype, backdrop) {
    var hasBackdrop = !!backdrop;
    var r0 = hasBackdrop ? backdrop[0] : 0;
    var g0 = hasBackdrop ? backdrop[1] : 0;
    var b0 = hasBackdrop ? backdrop[2] : 0;

    var composeFn;
    if (subtype === 'Luminosity') {
      composeFn = composeSMaskLuminosity;
    } else {
      composeFn = composeSMaskAlpha;
    }

    // processing image in chunks to save memory
    var PIXELS_TO_PROCESS = 1048576;
    var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));
    for (var row = 0; row < height; row += chunkSize) {
      var chunkHeight = Math.min(chunkSize, height - row);
      var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
      var layerData = layerCtx.getImageData(0, row, width, chunkHeight);

      if (hasBackdrop) {
        composeSMaskBackdrop(maskData.data, r0, g0, b0);
      }
      composeFn(maskData.data, layerData.data);

      maskCtx.putImageData(layerData, 0, row);
    }
  }

  function composeSMask(ctx, smask, layerCtx) {
    var mask = smask.canvas;
    var maskCtx = smask.context;

    ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY,
                     smask.offsetX, smask.offsetY);

    var backdrop = smask.backdrop || null;
    if (WebGLUtils.isEnabled) {
      var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask,
        {subtype: smask.subtype, backdrop: backdrop});
      ctx.setTransform(1, 0, 0, 1, 0, 0);
      ctx.drawImage(composed, smask.offsetX, smask.offsetY);
      return;
    }
    genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height,
                        smask.subtype, backdrop);
    ctx.drawImage(mask, 0, 0);
  }

  var LINE_CAP_STYLES = ['butt', 'round', 'square'];
  var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
  var NORMAL_CLIP = {};
  var EO_CLIP = {};

  CanvasGraphics.prototype = {

    beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) {
      // For pdfs that use blend modes we have to clear the canvas else certain
      // blend modes can look wrong since we'd be blending with a white
      // backdrop. The problem with a transparent backdrop though is we then
      // don't get sub pixel anti aliasing on text, so we fill with white if
      // we can.
      var width = this.ctx.canvas.width;
      var height = this.ctx.canvas.height;
      if (transparency) {
        this.ctx.clearRect(0, 0, width, height);
      } else {
        this.ctx.mozOpaque = true;
        this.ctx.save();
        this.ctx.fillStyle = 'rgb(255, 255, 255)';
        this.ctx.fillRect(0, 0, width, height);
        this.ctx.restore();
      }

      var transform = viewport.transform;

      this.ctx.save();
      this.ctx.transform.apply(this.ctx, transform);

      this.baseTransform = this.ctx.mozCurrentTransform.slice();

      if (this.imageLayer) {
        this.imageLayer.beginLayout();
      }
    },

    executeOperatorList: function CanvasGraphics_executeOperatorList(
                                    operatorList,
                                    executionStartIdx, continueCallback,
                                    stepper) {
      var argsArray = operatorList.argsArray;
      var fnArray = operatorList.fnArray;
      var i = executionStartIdx || 0;
      var argsArrayLen = argsArray.length;

      // Sometimes the OperatorList to execute is empty.
      if (argsArrayLen === i) {
        return i;
      }

      var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS &&
                             typeof continueCallback === 'function');
      var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;
      var steps = 0;

      var commonObjs = this.commonObjs;
      var objs = this.objs;
      var fnId;

      while (true) {
        if (stepper !== undefined && i === stepper.nextBreakPoint) {
          stepper.breakIt(i, continueCallback);
          return i;
        }

        fnId = fnArray[i];

        if (fnId !== OPS.dependency) {
          this[fnId].apply(this, argsArray[i]);
        } else {
          var deps = argsArray[i];
          for (var n = 0, nn = deps.length; n < nn; n++) {
            var depObjId = deps[n];
            var common = depObjId[0] === 'g' && depObjId[1] === '_';
            var objsPool = common ? commonObjs : objs;

            // If the promise isn't resolved yet, add the continueCallback
            // to the promise and bail out.
            if (!objsPool.isResolved(depObjId)) {
              objsPool.get(depObjId, continueCallback);
              return i;
            }
          }
        }

        i++;

        // If the entire operatorList was executed, stop as were done.
        if (i === argsArrayLen) {
          return i;
        }

        // If the execution took longer then a certain amount of time and
        // `continueCallback` is specified, interrupt the execution.
        if (chunkOperations && ++steps > EXECUTION_STEPS) {
          if (Date.now() > endTime) {
            continueCallback();
            return i;
          }
          steps = 0;
        }

        // If the operatorList isn't executed completely yet OR the execution
        // time was short enough, do another execution round.
      }
    },

    endDrawing: function CanvasGraphics_endDrawing() {
      this.ctx.restore();
      CachedCanvases.clear();
      WebGLUtils.clear();

      if (this.imageLayer) {
        this.imageLayer.endLayout();
      }
    },

    // Graphics state
    setLineWidth: function CanvasGraphics_setLineWidth(width) {
      this.current.lineWidth = width;
      this.ctx.lineWidth = width;
    },
    setLineCap: function CanvasGraphics_setLineCap(style) {
      this.ctx.lineCap = LINE_CAP_STYLES[style];
    },
    setLineJoin: function CanvasGraphics_setLineJoin(style) {
      this.ctx.lineJoin = LINE_JOIN_STYLES[style];
    },
    setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
      this.ctx.miterLimit = limit;
    },
    setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
      var ctx = this.ctx;
      if (ctx.setLineDash !== undefined) {
        ctx.setLineDash(dashArray);
        ctx.lineDashOffset = dashPhase;
      } else {
        ctx.mozDash = dashArray;
        ctx.mozDashOffset = dashPhase;
      }
    },
    setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
      // Maybe if we one day fully support color spaces this will be important
      // for now we can ignore.
      // TODO set rendering intent?
    },
    setFlatness: function CanvasGraphics_setFlatness(flatness) {
      // There's no way to control this with canvas, but we can safely ignore.
      // TODO set flatness?
    },
    setGState: function CanvasGraphics_setGState(states) {
      for (var i = 0, ii = states.length; i < ii; i++) {
        var state = states[i];
        var key = state[0];
        var value = state[1];

        switch (key) {
          case 'LW':
            this.setLineWidth(value);
            break;
          case 'LC':
            this.setLineCap(value);
            break;
          case 'LJ':
            this.setLineJoin(value);
            break;
          case 'ML':
            this.setMiterLimit(value);
            break;
          case 'D':
            this.setDash(value[0], value[1]);
            break;
          case 'RI':
            this.setRenderingIntent(value);
            break;
          case 'FL':
            this.setFlatness(value);
            break;
          case 'Font':
            this.setFont(value[0], value[1]);
            break;
          case 'CA':
            this.current.strokeAlpha = state[1];
            break;
          case 'ca':
            this.current.fillAlpha = state[1];
            this.ctx.globalAlpha = state[1];
            break;
          case 'BM':
            if (value && value.name && (value.name !== 'Normal')) {
              var mode = value.name.replace(/([A-Z])/g,
                function(c) {
                  return '-' + c.toLowerCase();
                }
              ).substring(1);
              this.ctx.globalCompositeOperation = mode;
              if (this.ctx.globalCompositeOperation !== mode) {
                warn('globalCompositeOperation "' + mode +
                     '" is not supported');
              }
            } else {
              this.ctx.globalCompositeOperation = 'source-over';
            }
            break;
          case 'SMask':
            if (this.current.activeSMask) {
              this.endSMaskGroup();
            }
            this.current.activeSMask = value ? this.tempSMask : null;
            if (this.current.activeSMask) {
              this.beginSMaskGroup();
            }
            this.tempSMask = null;
            break;
        }
      }
    },
    beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {

      var activeSMask = this.current.activeSMask;
      var drawnWidth = activeSMask.canvas.width;
      var drawnHeight = activeSMask.canvas.height;
      var cacheId = 'smaskGroupAt' + this.groupLevel;
      var scratchCanvas = CachedCanvases.getCanvas(
        cacheId, drawnWidth, drawnHeight, true);

      var currentCtx = this.ctx;
      var currentTransform = currentCtx.mozCurrentTransform;
      this.ctx.save();

      var groupCtx = scratchCanvas.context;
      groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);
      groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
      groupCtx.transform.apply(groupCtx, currentTransform);

      copyCtxState(currentCtx, groupCtx);
      this.ctx = groupCtx;
      this.setGState([
        ['BM', 'Normal'],
        ['ca', 1],
        ['CA', 1]
      ]);
      this.groupStack.push(currentCtx);
      this.groupLevel++;
    },
    endSMaskGroup: function CanvasGraphics_endSMaskGroup() {
      var groupCtx = this.ctx;
      this.groupLevel--;
      this.ctx = this.groupStack.pop();

      composeSMask(this.ctx, this.current.activeSMask, groupCtx);
      this.ctx.restore();
    },
    save: function CanvasGraphics_save() {
      this.ctx.save();
      var old = this.current;
      this.stateStack.push(old);
      this.current = old.clone();
      this.current.activeSMask = null;
    },
    restore: function CanvasGraphics_restore() {
      if (this.stateStack.length !== 0) {
        if (this.current.activeSMask !== null) {
          this.endSMaskGroup();
        }

        this.current = this.stateStack.pop();
        this.ctx.restore();

        this.cachedGetSinglePixelWidth = null;
      }
    },
    transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
      this.ctx.transform(a, b, c, d, e, f);

      this.cachedGetSinglePixelWidth = null;
    },

    // Path
    constructPath: function CanvasGraphics_constructPath(ops, args) {
      var ctx = this.ctx;
      var current = this.current;
      var x = current.x, y = current.y;
      for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {
        switch (ops[i] | 0) {
          case OPS.rectangle:
            x = args[j++];
            y = args[j++];
            var width = args[j++];
            var height = args[j++];
            if (width === 0) {
              width = this.getSinglePixelWidth();
            }
            if (height === 0) {
              height = this.getSinglePixelWidth();
            }
            var xw = x + width;
            var yh = y + height;
            this.ctx.moveTo(x, y);
            this.ctx.lineTo(xw, y);
            this.ctx.lineTo(xw, yh);
            this.ctx.lineTo(x, yh);
            this.ctx.lineTo(x, y);
            this.ctx.closePath();
            break;
          case OPS.moveTo:
            x = args[j++];
            y = args[j++];
            ctx.moveTo(x, y);
            break;
          case OPS.lineTo:
            x = args[j++];
            y = args[j++];
            ctx.lineTo(x, y);
            break;
          case OPS.curveTo:
            x = args[j + 4];
            y = args[j + 5];
            ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3],
                              x, y);
            j += 6;
            break;
          case OPS.curveTo2:
            ctx.bezierCurveTo(x, y, args[j], args[j + 1],
                              args[j + 2], args[j + 3]);
            x = args[j + 2];
            y = args[j + 3];
            j += 4;
            break;
          case OPS.curveTo3:
            x = args[j + 2];
            y = args[j + 3];
            ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);
            j += 4;
            break;
          case OPS.closePath:
            ctx.closePath();
            break;
        }
      }
      current.setCurrentPoint(x, y);
    },
    closePath: function CanvasGraphics_closePath() {
      this.ctx.closePath();
    },
    stroke: function CanvasGraphics_stroke(consumePath) {
      consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
      var ctx = this.ctx;
      var strokeColor = this.current.strokeColor;
      // Prevent drawing too thin lines by enforcing a minimum line width.
      ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,
                               this.current.lineWidth);
      // For stroke we want to temporarily change the global alpha to the
      // stroking alpha.
      ctx.globalAlpha = this.current.strokeAlpha;
      if (strokeColor && strokeColor.hasOwnProperty('type') &&
          strokeColor.type === 'Pattern') {
        // for patterns, we transform to pattern space, calculate
        // the pattern, call stroke, and restore to user space
        ctx.save();
        ctx.strokeStyle = strokeColor.getPattern(ctx, this);
        ctx.stroke();
        ctx.restore();
      } else {
        ctx.stroke();
      }
      if (consumePath) {
        this.consumePath();
      }
      // Restore the global alpha to the fill alpha
      ctx.globalAlpha = this.current.fillAlpha;
    },
    closeStroke: function CanvasGraphics_closeStroke() {
      this.closePath();
      this.stroke();
    },
    fill: function CanvasGraphics_fill(consumePath) {
      consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
      var ctx = this.ctx;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;
      var needRestore = false;

      if (isPatternFill) {
        ctx.save();
        ctx.fillStyle = fillColor.getPattern(ctx, this);
        needRestore = true;
      }

      if (this.pendingEOFill) {
        if (ctx.mozFillRule !== undefined) {
          ctx.mozFillRule = 'evenodd';
          ctx.fill();
          ctx.mozFillRule = 'nonzero';
        } else {
          try {
            ctx.fill('evenodd');
          } catch (ex) {
            // shouldn't really happen, but browsers might think differently
            ctx.fill();
          }
        }
        this.pendingEOFill = false;
      } else {
        ctx.fill();
      }

      if (needRestore) {
        ctx.restore();
      }
      if (consumePath) {
        this.consumePath();
      }
    },
    eoFill: function CanvasGraphics_eoFill() {
      this.pendingEOFill = true;
      this.fill();
    },
    fillStroke: function CanvasGraphics_fillStroke() {
      this.fill(false);
      this.stroke(false);

      this.consumePath();
    },
    eoFillStroke: function CanvasGraphics_eoFillStroke() {
      this.pendingEOFill = true;
      this.fillStroke();
    },
    closeFillStroke: function CanvasGraphics_closeFillStroke() {
      this.closePath();
      this.fillStroke();
    },
    closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
      this.pendingEOFill = true;
      this.closePath();
      this.fillStroke();
    },
    endPath: function CanvasGraphics_endPath() {
      this.consumePath();
    },

    // Clipping
    clip: function CanvasGraphics_clip() {
      this.pendingClip = NORMAL_CLIP;
    },
    eoClip: function CanvasGraphics_eoClip() {
      this.pendingClip = EO_CLIP;
    },

    // Text
    beginText: function CanvasGraphics_beginText() {
      this.current.textMatrix = IDENTITY_MATRIX;
      this.current.textMatrixScale = 1;
      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
    },
    endText: function CanvasGraphics_endText() {
      var paths = this.pendingTextPaths;
      var ctx = this.ctx;
      if (paths === undefined) {
        ctx.beginPath();
        return;
      }

      ctx.save();
      ctx.beginPath();
      for (var i = 0; i < paths.length; i++) {
        var path = paths[i];
        ctx.setTransform.apply(ctx, path.transform);
        ctx.translate(path.x, path.y);
        path.addToPath(ctx, path.fontSize);
      }
      ctx.restore();
      ctx.clip();
      ctx.beginPath();
      delete this.pendingTextPaths;
    },
    setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
      this.current.charSpacing = spacing;
    },
    setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
      this.current.wordSpacing = spacing;
    },
    setHScale: function CanvasGraphics_setHScale(scale) {
      this.current.textHScale = scale / 100;
    },
    setLeading: function CanvasGraphics_setLeading(leading) {
      this.current.leading = -leading;
    },
    setFont: function CanvasGraphics_setFont(fontRefName, size) {
      var fontObj = this.commonObjs.get(fontRefName);
      var current = this.current;

      if (!fontObj) {
        error('Can\'t find font for ' + fontRefName);
      }

      current.fontMatrix = (fontObj.fontMatrix ?
                            fontObj.fontMatrix : FONT_IDENTITY_MATRIX);

      // A valid matrix needs all main diagonal elements to be non-zero
      // This also ensures we bypass FF bugzilla bug #719844.
      if (current.fontMatrix[0] === 0 ||
          current.fontMatrix[3] === 0) {
        warn('Invalid font matrix for font ' + fontRefName);
      }

      // The spec for Tf (setFont) says that 'size' specifies the font 'scale',
      // and in some docs this can be negative (inverted x-y axes).
      if (size < 0) {
        size = -size;
        current.fontDirection = -1;
      } else {
        current.fontDirection = 1;
      }

      this.current.font = fontObj;
      this.current.fontSize = size;

      if (fontObj.isType3Font) {
        return; // we don't need ctx.font for Type3 fonts
      }

      var name = fontObj.loadedName || 'sans-serif';
      var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') :
                                 (fontObj.bold ? 'bold' : 'normal');

      var italic = fontObj.italic ? 'italic' : 'normal';
      var typeface = '"' + name + '", ' + fontObj.fallbackName;

      // Some font backends cannot handle fonts below certain size.
      // Keeping the font at minimal size and using the fontSizeScale to change
      // the current transformation matrix before the fillText/strokeText.
      // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
      var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE :
                            size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size;
      this.current.fontSizeScale = size / browserFontSize;

      var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
      this.ctx.font = rule;
    },
    setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
      this.current.textRenderingMode = mode;
    },
    setTextRise: function CanvasGraphics_setTextRise(rise) {
      this.current.textRise = rise;
    },
    moveText: function CanvasGraphics_moveText(x, y) {
      this.current.x = this.current.lineX += x;
      this.current.y = this.current.lineY += y;
    },
    setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
      this.setLeading(-y);
      this.moveText(x, y);
    },
    setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
      this.current.textMatrix = [a, b, c, d, e, f];
      this.current.textMatrixScale = Math.sqrt(a * a + b * b);

      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
    },
    nextLine: function CanvasGraphics_nextLine() {
      this.moveText(0, this.current.leading);
    },

    paintChar: function CanvasGraphics_paintChar(character, x, y) {
      var ctx = this.ctx;
      var current = this.current;
      var font = current.font;
      var textRenderingMode = current.textRenderingMode;
      var fontSize = current.fontSize / current.fontSizeScale;
      var fillStrokeMode = textRenderingMode &
        TextRenderingMode.FILL_STROKE_MASK;
      var isAddToPathSet = !!(textRenderingMode &
        TextRenderingMode.ADD_TO_PATH_FLAG);

      var addToPath;
      if (font.disableFontFace || isAddToPathSet) {
        addToPath = font.getPathGenerator(this.commonObjs, character);
      }

      if (font.disableFontFace) {
        ctx.save();
        ctx.translate(x, y);
        ctx.beginPath();
        addToPath(ctx, fontSize);
        if (fillStrokeMode === TextRenderingMode.FILL ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.fill();
        }
        if (fillStrokeMode === TextRenderingMode.STROKE ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.stroke();
        }
        ctx.restore();
      } else {
        if (fillStrokeMode === TextRenderingMode.FILL ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.fillText(character, x, y);
        }
        if (fillStrokeMode === TextRenderingMode.STROKE ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.strokeText(character, x, y);
        }
      }

      if (isAddToPathSet) {
        var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
        paths.push({
          transform: ctx.mozCurrentTransform,
          x: x,
          y: y,
          fontSize: fontSize,
          addToPath: addToPath
        });
      }
    },

    get isFontSubpixelAAEnabled() {
      // Checks if anti-aliasing is enabled when scaled text is painted.
      // On Windows GDI scaled fonts looks bad.
      var ctx = document.createElement('canvas').getContext('2d');
      ctx.scale(1.5, 1);
      ctx.fillText('I', 0, 10);
      var data = ctx.getImageData(0, 0, 10, 10).data;
      var enabled = false;
      for (var i = 3; i < data.length; i += 4) {
        if (data[i] > 0 && data[i] < 255) {
          enabled = true;
          break;
        }
      }
      return shadow(this, 'isFontSubpixelAAEnabled', enabled);
    },

    showText: function CanvasGraphics_showText(glyphs) {
      var current = this.current;
      var font = current.font;
      if (font.isType3Font) {
        return this.showType3Text(glyphs);
      }

      var fontSize = current.fontSize;
      if (fontSize === 0) {
        return;
      }

      var ctx = this.ctx;
      var fontSizeScale = current.fontSizeScale;
      var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var fontDirection = current.fontDirection;
      var textHScale = current.textHScale * fontDirection;
      var glyphsLength = glyphs.length;
      var vertical = font.vertical;
      var defaultVMetrics = font.defaultVMetrics;
      var widthAdvanceScale = fontSize * current.fontMatrix[0];

      var simpleFillText =
        current.textRenderingMode === TextRenderingMode.FILL &&
        !font.disableFontFace;

      ctx.save();
      ctx.transform.apply(ctx, current.textMatrix);
      ctx.translate(current.x, current.y + current.textRise);

      if (fontDirection > 0) {
        ctx.scale(textHScale, -1);
      } else {
        ctx.scale(textHScale, 1);
      }

      var lineWidth = current.lineWidth;
      var scale = current.textMatrixScale;
      if (scale === 0 || lineWidth === 0) {
        var fillStrokeMode = current.textRenderingMode &
          TextRenderingMode.FILL_STROKE_MASK;
        if (fillStrokeMode === TextRenderingMode.STROKE ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          this.cachedGetSinglePixelWidth = null;
          lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR;
        }
      } else {
        lineWidth /= scale;
      }

      if (fontSizeScale !== 1.0) {
        ctx.scale(fontSizeScale, fontSizeScale);
        lineWidth /= fontSizeScale;
      }

      ctx.lineWidth = lineWidth;

      var x = 0, i;
      for (i = 0; i < glyphsLength; ++i) {
        var glyph = glyphs[i];
        if (glyph === null) {
          // word break
          x += fontDirection * wordSpacing;
          continue;
        } else if (isNum(glyph)) {
          x += -glyph * fontSize * 0.001;
          continue;
        }

        var restoreNeeded = false;
        var character = glyph.fontChar;
        var accent = glyph.accent;
        var scaledX, scaledY, scaledAccentX, scaledAccentY;
        var width = glyph.width;
        if (vertical) {
          var vmetric, vx, vy;
          vmetric = glyph.vmetric || defaultVMetrics;
          vx = glyph.vmetric ? vmetric[1] : width * 0.5;
          vx = -vx * widthAdvanceScale;
          vy = vmetric[2] * widthAdvanceScale;

          width = vmetric ? -vmetric[0] : width;
          scaledX = vx / fontSizeScale;
          scaledY = (x + vy) / fontSizeScale;
        } else {
          scaledX = x / fontSizeScale;
          scaledY = 0;
        }

        if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) {
          // some standard fonts may not have the exact width, trying to
          // rescale per character
          var measuredWidth = ctx.measureText(character).width * 1000 /
            fontSize * fontSizeScale;
          var characterScaleX = width / measuredWidth;
          restoreNeeded = true;
          ctx.save();
          ctx.scale(characterScaleX, 1);
          scaledX /= characterScaleX;
        }

        if (simpleFillText && !accent) {
          // common case
          ctx.fillText(character, scaledX, scaledY);
        } else {
          this.paintChar(character, scaledX, scaledY);
          if (accent) {
            scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
            scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
            this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
          }
        }

        var charWidth = width * widthAdvanceScale + charSpacing * fontDirection;
        x += charWidth;

        if (restoreNeeded) {
          ctx.restore();
        }
      }
      if (vertical) {
        current.y -= x * textHScale;
      } else {
        current.x += x * textHScale;
      }
      ctx.restore();
    },

    showType3Text: function CanvasGraphics_showType3Text(glyphs) {
      // Type3 fonts - each glyph is a "mini-PDF"
      var ctx = this.ctx;
      var current = this.current;
      var font = current.font;
      var fontSize = current.fontSize;
      var fontDirection = current.fontDirection;
      var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var textHScale = current.textHScale * fontDirection;
      var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
      var glyphsLength = glyphs.length;
      var isTextInvisible =
        current.textRenderingMode === TextRenderingMode.INVISIBLE;
      var i, glyph, width;

      if (isTextInvisible || fontSize === 0) {
        return;
      }
      this.cachedGetSinglePixelWidth = null;

      ctx.save();
      ctx.transform.apply(ctx, current.textMatrix);
      ctx.translate(current.x, current.y);

      ctx.scale(textHScale, fontDirection);

      for (i = 0; i < glyphsLength; ++i) {
        glyph = glyphs[i];
        if (glyph === null) {
          // word break
          this.ctx.translate(wordSpacing, 0);
          current.x += wordSpacing * textHScale;
          continue;
        } else if (isNum(glyph)) {
          var spacingLength = -glyph * 0.001 * fontSize;
          this.ctx.translate(spacingLength, 0);
          current.x += spacingLength * textHScale;
          continue;
        }

        var operatorList = font.charProcOperatorList[glyph.operatorListId];
        if (!operatorList) {
          warn('Type3 character \"' + glyph.operatorListId +
               '\" is not available');
          continue;
        }
        this.processingType3 = glyph;
        this.save();
        ctx.scale(fontSize, fontSize);
        ctx.transform.apply(ctx, fontMatrix);
        this.executeOperatorList(operatorList);
        this.restore();

        var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
        width = transformed[0] * fontSize + charSpacing;

        ctx.translate(width, 0);
        current.x += width * textHScale;
      }
      ctx.restore();
      this.processingType3 = null;
    },

    // Type3 fonts
    setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
      // We can safely ignore this since the width should be the same
      // as the width in the Widths array.
    },
    setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
                                                                        yWidth,
                                                                        llx,
                                                                        lly,
                                                                        urx,
                                                                        ury) {
      // TODO According to the spec we're also suppose to ignore any operators
      // that set color or include images while processing this type3 font.
      this.ctx.rect(llx, lly, urx - llx, ury - lly);
      this.clip();
      this.endPath();
    },

    // Color
    getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {
      var pattern;
      if (IR[0] === 'TilingPattern') {
        var color = IR[1];
        pattern = new TilingPattern(IR, color, this.ctx, this.objs,
                                    this.commonObjs, this.baseTransform);
      } else {
        pattern = getShadingPatternFromIR(IR);
      }
      return pattern;
    },
    setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
      this.current.strokeColor = this.getColorN_Pattern(arguments);
    },
    setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
      this.current.fillColor = this.getColorN_Pattern(arguments);
      this.current.patternFill = true;
    },
    setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.ctx.strokeStyle = color;
      this.current.strokeColor = color;
    },
    setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.ctx.fillStyle = color;
      this.current.fillColor = color;
      this.current.patternFill = false;
    },

    shadingFill: function CanvasGraphics_shadingFill(patternIR) {
      var ctx = this.ctx;

      this.save();
      var pattern = getShadingPatternFromIR(patternIR);
      ctx.fillStyle = pattern.getPattern(ctx, this, true);

      var inv = ctx.mozCurrentTransformInverse;
      if (inv) {
        var canvas = ctx.canvas;
        var width = canvas.width;
        var height = canvas.height;

        var bl = Util.applyTransform([0, 0], inv);
        var br = Util.applyTransform([0, height], inv);
        var ul = Util.applyTransform([width, 0], inv);
        var ur = Util.applyTransform([width, height], inv);

        var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
        var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
        var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
        var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);

        this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
      } else {
        // HACK to draw the gradient onto an infinite rectangle.
        // PDF gradients are drawn across the entire image while
        // Canvas only allows gradients to be drawn in a rectangle
        // The following bug should allow us to remove this.
        // https://bugzilla.mozilla.org/show_bug.cgi?id=664884

        this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
      }

      this.restore();
    },

    // Images
    beginInlineImage: function CanvasGraphics_beginInlineImage() {
      error('Should not call beginInlineImage');
    },
    beginImageData: function CanvasGraphics_beginImageData() {
      error('Should not call beginImageData');
    },

    paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
                                                                        bbox) {
      this.save();
      this.baseTransformStack.push(this.baseTransform);

      if (isArray(matrix) && 6 === matrix.length) {
        this.transform.apply(this, matrix);
      }

      this.baseTransform = this.ctx.mozCurrentTransform;

      if (isArray(bbox) && 4 === bbox.length) {
        var width = bbox[2] - bbox[0];
        var height = bbox[3] - bbox[1];
        this.ctx.rect(bbox[0], bbox[1], width, height);
        this.clip();
        this.endPath();
      }
    },

    paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
      this.restore();
      this.baseTransform = this.baseTransformStack.pop();
    },

    beginGroup: function CanvasGraphics_beginGroup(group) {
      this.save();
      var currentCtx = this.ctx;
      // TODO non-isolated groups - according to Rik at adobe non-isolated
      // group results aren't usually that different and they even have tools
      // that ignore this setting. Notes from Rik on implmenting:
      // - When you encounter an transparency group, create a new canvas with
      // the dimensions of the bbox
      // - copy the content from the previous canvas to the new canvas
      // - draw as usual
      // - remove the backdrop alpha:
      // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
      // value of your transparency group and 'alphaBackdrop' the alpha of the
      // backdrop
      // - remove background color:
      // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
      if (!group.isolated) {
        info('TODO: Support non-isolated groups.');
      }

      // TODO knockout - supposedly possible with the clever use of compositing
      // modes.
      if (group.knockout) {
        warn('Knockout groups not supported.');
      }

      var currentTransform = currentCtx.mozCurrentTransform;
      if (group.matrix) {
        currentCtx.transform.apply(currentCtx, group.matrix);
      }
      assert(group.bbox, 'Bounding box is required.');

      // Based on the current transform figure out how big the bounding box
      // will actually be.
      var bounds = Util.getAxialAlignedBoundingBox(
                    group.bbox,
                    currentCtx.mozCurrentTransform);
      // Clip the bounding box to the current canvas.
      var canvasBounds = [0,
                          0,
                          currentCtx.canvas.width,
                          currentCtx.canvas.height];
      bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];
      // Use ceil in case we're between sizes so we don't create canvas that is
      // too small and make the canvas at least 1x1 pixels.
      var offsetX = Math.floor(bounds[0]);
      var offsetY = Math.floor(bounds[1]);
      var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);
      var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);
      var scaleX = 1, scaleY = 1;
      if (drawnWidth > MAX_GROUP_SIZE) {
        scaleX = drawnWidth / MAX_GROUP_SIZE;
        drawnWidth = MAX_GROUP_SIZE;
      }
      if (drawnHeight > MAX_GROUP_SIZE) {
        scaleY = drawnHeight / MAX_GROUP_SIZE;
        drawnHeight = MAX_GROUP_SIZE;
      }

      var cacheId = 'groupAt' + this.groupLevel;
      if (group.smask) {
        // Using two cache entries is case if masks are used one after another.
        cacheId +=  '_smask_' + ((this.smaskCounter++) % 2);
      }
      var scratchCanvas = CachedCanvases.getCanvas(
        cacheId, drawnWidth, drawnHeight, true);
      var groupCtx = scratchCanvas.context;

      // Since we created a new canvas that is just the size of the bounding box
      // we have to translate the group ctx.
      groupCtx.scale(1 / scaleX, 1 / scaleY);
      groupCtx.translate(-offsetX, -offsetY);
      groupCtx.transform.apply(groupCtx, currentTransform);

      if (group.smask) {
        // Saving state and cached mask to be used in setGState.
        this.smaskStack.push({
          canvas: scratchCanvas.canvas,
          context: groupCtx,
          offsetX: offsetX,
          offsetY: offsetY,
          scaleX: scaleX,
          scaleY: scaleY,
          subtype: group.smask.subtype,
          backdrop: group.smask.backdrop
        });
      } else {
        // Setup the current ctx so when the group is popped we draw it at the
        // right location.
        currentCtx.setTransform(1, 0, 0, 1, 0, 0);
        currentCtx.translate(offsetX, offsetY);
        currentCtx.scale(scaleX, scaleY);
      }
      // The transparency group inherits all off the current graphics state
      // except the blend mode, soft mask, and alpha constants.
      copyCtxState(currentCtx, groupCtx);
      this.ctx = groupCtx;
      this.setGState([
        ['BM', 'Normal'],
        ['ca', 1],
        ['CA', 1]
      ]);
      this.groupStack.push(currentCtx);
      this.groupLevel++;
    },

    endGroup: function CanvasGraphics_endGroup(group) {
      this.groupLevel--;
      var groupCtx = this.ctx;
      this.ctx = this.groupStack.pop();
      // Turn off image smoothing to avoid sub pixel interpolation which can
      // look kind of blurry for some pdfs.
      if (this.ctx.imageSmoothingEnabled !== undefined) {
        this.ctx.imageSmoothingEnabled = false;
      } else {
        this.ctx.mozImageSmoothingEnabled = false;
      }
      if (group.smask) {
        this.tempSMask = this.smaskStack.pop();
      } else {
        this.ctx.drawImage(groupCtx.canvas, 0, 0);
      }
      this.restore();
    },

    beginAnnotations: function CanvasGraphics_beginAnnotations() {
      this.save();
      this.current = new CanvasExtraState();
    },

    endAnnotations: function CanvasGraphics_endAnnotations() {
      this.restore();
    },

    beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
                                                             matrix) {
      this.save();

      if (isArray(rect) && 4 === rect.length) {
        var width = rect[2] - rect[0];
        var height = rect[3] - rect[1];
        this.ctx.rect(rect[0], rect[1], width, height);
        this.clip();
        this.endPath();
      }

      this.transform.apply(this, transform);
      this.transform.apply(this, matrix);
    },

    endAnnotation: function CanvasGraphics_endAnnotation() {
      this.restore();
    },

    paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
      var domImage = this.objs.get(objId);
      if (!domImage) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

      this.save();

      var ctx = this.ctx;
      // scale the image to the unit square
      ctx.scale(1 / w, -1 / h);

      ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
                    0, -h, w, h);
      if (this.imageLayer) {
        var currentTransform = ctx.mozCurrentTransformInverse;
        var position = this.getCanvasPosition(0, 0);
        this.imageLayer.appendImage({
          objId: objId,
          left: position[0],
          top: position[1],
          width: w / currentTransform[0],
          height: h / currentTransform[3]
        });
      }
      this.restore();
    },

    paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
      var ctx = this.ctx;
      var width = img.width, height = img.height;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;

      var glyph = this.processingType3;

      if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {
        if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
          glyph.compiled =
            compileType3Glyph({data: img.data, width: width, height: height});
        } else {
          glyph.compiled = null;
        }
      }

      if (glyph && glyph.compiled) {
        glyph.compiled(ctx);
        return;
      }

      var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
      var maskCtx = maskCanvas.context;
      maskCtx.save();

      putBinaryImageMask(maskCtx, img);

      maskCtx.globalCompositeOperation = 'source-in';

      maskCtx.fillStyle = isPatternFill ?
                          fillColor.getPattern(maskCtx, this) : fillColor;
      maskCtx.fillRect(0, 0, width, height);

      maskCtx.restore();

      this.paintInlineImageXObject(maskCanvas.canvas);
    },

    paintImageMaskXObjectRepeat:
      function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX,
                                                          scaleY, positions) {
      var width = imgData.width;
      var height = imgData.height;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;

      var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
      var maskCtx = maskCanvas.context;
      maskCtx.save();

      putBinaryImageMask(maskCtx, imgData);

      maskCtx.globalCompositeOperation = 'source-in';

      maskCtx.fillStyle = isPatternFill ?
                          fillColor.getPattern(maskCtx, this) : fillColor;
      maskCtx.fillRect(0, 0, width, height);

      maskCtx.restore();

      var ctx = this.ctx;
      for (var i = 0, ii = positions.length; i < ii; i += 2) {
        ctx.save();
        ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);
        ctx.scale(1, -1);
        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
          0, -1, 1, 1);
        ctx.restore();
      }
    },

    paintImageMaskXObjectGroup:
      function CanvasGraphics_paintImageMaskXObjectGroup(images) {
      var ctx = this.ctx;

      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;
      for (var i = 0, ii = images.length; i < ii; i++) {
        var image = images[i];
        var width = image.width, height = image.height;

        var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
        var maskCtx = maskCanvas.context;
        maskCtx.save();

        putBinaryImageMask(maskCtx, image);

        maskCtx.globalCompositeOperation = 'source-in';

        maskCtx.fillStyle = isPatternFill ?
                            fillColor.getPattern(maskCtx, this) : fillColor;
        maskCtx.fillRect(0, 0, width, height);

        maskCtx.restore();

        ctx.save();
        ctx.transform.apply(ctx, image.transform);
        ctx.scale(1, -1);
        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
                      0, -1, 1, 1);
        ctx.restore();
      }
    },

    paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

      this.paintInlineImageXObject(imgData);
    },

    paintImageXObjectRepeat:
      function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY,
                                                          positions) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

      var width = imgData.width;
      var height = imgData.height;
      var map = [];
      for (var i = 0, ii = positions.length; i < ii; i += 2) {
        map.push({transform: [scaleX, 0, 0, scaleY, positions[i],
                 positions[i + 1]], x: 0, y: 0, w: width, h: height});
      }
      this.paintInlineImageXObjectGroup(imgData, map);
    },

    paintInlineImageXObject:
      function CanvasGraphics_paintInlineImageXObject(imgData) {
      var width = imgData.width;
      var height = imgData.height;
      var ctx = this.ctx;

      this.save();
      // scale the image to the unit square
      ctx.scale(1 / width, -1 / height);

      var currentTransform = ctx.mozCurrentTransformInverse;
      var a = currentTransform[0], b = currentTransform[1];
      var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
      var c = currentTransform[2], d = currentTransform[3];
      var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);

      var imgToPaint, tmpCanvas;
      // instanceof HTMLElement does not work in jsdom node.js module
      if (imgData instanceof HTMLElement || !imgData.data) {
        imgToPaint = imgData;
      } else {
        tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height);
        var tmpCtx = tmpCanvas.context;
        putBinaryImageData(tmpCtx, imgData);
        imgToPaint = tmpCanvas.canvas;
      }

      var paintWidth = width, paintHeight = height;
      var tmpCanvasId = 'prescale1';
      // Vertial or horizontal scaling shall not be more than 2 to not loose the
      // pixels during drawImage operation, painting on the temporary canvas(es)
      // that are twice smaller in size
      while ((widthScale > 2 && paintWidth > 1) ||
             (heightScale > 2 && paintHeight > 1)) {
        var newWidth = paintWidth, newHeight = paintHeight;
        if (widthScale > 2 && paintWidth > 1) {
          newWidth = Math.ceil(paintWidth / 2);
          widthScale /= paintWidth / newWidth;
        }
        if (heightScale > 2 && paintHeight > 1) {
          newHeight = Math.ceil(paintHeight / 2);
          heightScale /= paintHeight / newHeight;
        }
        tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight);
        tmpCtx = tmpCanvas.context;
        tmpCtx.clearRect(0, 0, newWidth, newHeight);
        tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
                                     0, 0, newWidth, newHeight);
        imgToPaint = tmpCanvas.canvas;
        paintWidth = newWidth;
        paintHeight = newHeight;
        tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1';
      }
      ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
                                0, -height, width, height);

      if (this.imageLayer) {
        var position = this.getCanvasPosition(0, -height);
        this.imageLayer.appendImage({
          imgData: imgData,
          left: position[0],
          top: position[1],
          width: width / currentTransform[0],
          height: height / currentTransform[3]
        });
      }
      this.restore();
    },

    paintInlineImageXObjectGroup:
      function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
      var ctx = this.ctx;
      var w = imgData.width;
      var h = imgData.height;

      var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h);
      var tmpCtx = tmpCanvas.context;
      putBinaryImageData(tmpCtx, imgData);

      for (var i = 0, ii = map.length; i < ii; i++) {
        var entry = map[i];
        ctx.save();
        ctx.transform.apply(ctx, entry.transform);
        ctx.scale(1, -1);
        ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
                      0, -1, 1, 1);
        if (this.imageLayer) {
          var position = this.getCanvasPosition(entry.x, entry.y);
          this.imageLayer.appendImage({
            imgData: imgData,
            left: position[0],
            top: position[1],
            width: w,
            height: h
          });
        }
        ctx.restore();
      }
    },

    paintSolidColorImageMask:
      function CanvasGraphics_paintSolidColorImageMask() {
        this.ctx.fillRect(0, 0, 1, 1);
    },

    // Marked content

    markPoint: function CanvasGraphics_markPoint(tag) {
      // TODO Marked content.
    },
    markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
      // TODO Marked content.
    },
    beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
      // TODO Marked content.
    },
    beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
                                        tag, properties) {
      // TODO Marked content.
    },
    endMarkedContent: function CanvasGraphics_endMarkedContent() {
      // TODO Marked content.
    },

    // Compatibility

    beginCompat: function CanvasGraphics_beginCompat() {
      // TODO ignore undefined operators (should we do that anyway?)
    },
    endCompat: function CanvasGraphics_endCompat() {
      // TODO stop ignoring undefined operators
    },

    // Helper functions

    consumePath: function CanvasGraphics_consumePath() {
      var ctx = this.ctx;
      if (this.pendingClip) {
        if (this.pendingClip === EO_CLIP) {
          if (ctx.mozFillRule !== undefined) {
            ctx.mozFillRule = 'evenodd';
            ctx.clip();
            ctx.mozFillRule = 'nonzero';
          } else {
            try {
              ctx.clip('evenodd');
            } catch (ex) {
              // shouldn't really happen, but browsers might think differently
              ctx.clip();
            }
          }
        } else {
          ctx.clip();
        }
        this.pendingClip = null;
      }
      ctx.beginPath();
    },
    getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
      if (this.cachedGetSinglePixelWidth === null) {
        var inverse = this.ctx.mozCurrentTransformInverse;
        // max of the current horizontal and vertical scale
        this.cachedGetSinglePixelWidth = Math.sqrt(Math.max(
          (inverse[0] * inverse[0] + inverse[1] * inverse[1]),
          (inverse[2] * inverse[2] + inverse[3] * inverse[3])));
      }
      return this.cachedGetSinglePixelWidth;
    },
    getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
        var transform = this.ctx.mozCurrentTransform;
        return [
          transform[0] * x + transform[2] * y + transform[4],
          transform[1] * x + transform[3] * y + transform[5]
        ];
    }
  };

  for (var op in OPS) {
    CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
  }

  return CanvasGraphics;
})();


var WebGLUtils = (function WebGLUtilsClosure() {
  function loadShader(gl, code, shaderType) {
    var shader = gl.createShader(shaderType);
    gl.shaderSource(shader, code);
    gl.compileShader(shader);
    var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
    if (!compiled) {
      var errorMsg = gl.getShaderInfoLog(shader);
      throw new Error('Error during shader compilation: ' + errorMsg);
    }
    return shader;
  }
  function createVertexShader(gl, code) {
    return loadShader(gl, code, gl.VERTEX_SHADER);
  }
  function createFragmentShader(gl, code) {
    return loadShader(gl, code, gl.FRAGMENT_SHADER);
  }
  function createProgram(gl, shaders) {
    var program = gl.createProgram();
    for (var i = 0, ii = shaders.length; i < ii; ++i) {
      gl.attachShader(program, shaders[i]);
    }
    gl.linkProgram(program);
    var linked = gl.getProgramParameter(program, gl.LINK_STATUS);
    if (!linked) {
      var errorMsg = gl.getProgramInfoLog(program);
      throw new Error('Error during program linking: ' + errorMsg);
    }
    return program;
  }
  function createTexture(gl, image, textureId) {
    gl.activeTexture(textureId);
    var texture = gl.createTexture();
    gl.bindTexture(gl.TEXTURE_2D, texture);

    // Set the parameters so we can render any size image.
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);

    // Upload the image into the texture.
    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
    return texture;
  }

  var currentGL, currentCanvas;
  function generateGL() {
    if (currentGL) {
      return;
    }
    currentCanvas = document.createElement('canvas');
    currentGL = currentCanvas.getContext('webgl',
      { premultipliedalpha: false });
  }

  var smaskVertexShaderCode = '\
  attribute vec2 a_position;                                    \
  attribute vec2 a_texCoord;                                    \
                                                                \
  uniform vec2 u_resolution;                                    \
                                                                \
  varying vec2 v_texCoord;                                      \
                                                                \
  void main() {                                                 \
    vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0;   \
    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
                                                                \
    v_texCoord = a_texCoord;                                    \
  }                                                             ';

  var smaskFragmentShaderCode = '\
  precision mediump float;                                      \
                                                                \
  uniform vec4 u_backdrop;                                      \
  uniform int u_subtype;                                        \
  uniform sampler2D u_image;                                    \
  uniform sampler2D u_mask;                                     \
                                                                \
  varying vec2 v_texCoord;                                      \
                                                                \
  void main() {                                                 \
    vec4 imageColor = texture2D(u_image, v_texCoord);           \
    vec4 maskColor = texture2D(u_mask, v_texCoord);             \
    if (u_backdrop.a > 0.0) {                                   \
      maskColor.rgb = maskColor.rgb * maskColor.a +             \
                      u_backdrop.rgb * (1.0 - maskColor.a);     \
    }                                                           \
    float lum;                                                  \
    if (u_subtype == 0) {                                       \
      lum = maskColor.a;                                        \
    } else {                                                    \
      lum = maskColor.r * 0.3 + maskColor.g * 0.59 +            \
            maskColor.b * 0.11;                                 \
    }                                                           \
    imageColor.a *= lum;                                        \
    imageColor.rgb *= imageColor.a;                             \
    gl_FragColor = imageColor;                                  \
  }                                                             ';

  var smaskCache = null;

  function initSmaskGL() {
    var canvas, gl;

    generateGL();
    canvas = currentCanvas;
    currentCanvas = null;
    gl = currentGL;
    currentGL = null;

    // setup a GLSL program
    var vertexShader = createVertexShader(gl, smaskVertexShaderCode);
    var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);
    var program = createProgram(gl, [vertexShader, fragmentShader]);
    gl.useProgram(program);

    var cache = {};
    cache.gl = gl;
    cache.canvas = canvas;
    cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
    cache.positionLocation = gl.getAttribLocation(program, 'a_position');
    cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop');
    cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype');

    var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
    var texLayerLocation = gl.getUniformLocation(program, 'u_image');
    var texMaskLocation = gl.getUniformLocation(program, 'u_mask');

    // provide texture coordinates for the rectangle.
    var texCoordBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
      0.0,  0.0,
      1.0,  0.0,
      0.0,  1.0,
      0.0,  1.0,
      1.0,  0.0,
      1.0,  1.0]), gl.STATIC_DRAW);
    gl.enableVertexAttribArray(texCoordLocation);
    gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);

    gl.uniform1i(texLayerLocation, 0);
    gl.uniform1i(texMaskLocation, 1);

    smaskCache = cache;
  }

  function composeSMask(layer, mask, properties) {
    var width = layer.width, height = layer.height;

    if (!smaskCache) {
      initSmaskGL();
    }
    var cache = smaskCache,canvas = cache.canvas, gl = cache.gl;
    canvas.width = width;
    canvas.height = height;
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    gl.uniform2f(cache.resolutionLocation, width, height);

    if (properties.backdrop) {
      gl.uniform4f(cache.resolutionLocation, properties.backdrop[0],
                   properties.backdrop[1], properties.backdrop[2], 1);
    } else {
      gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);
    }
    gl.uniform1i(cache.subtypeLocation,
                 properties.subtype === 'Luminosity' ? 1 : 0);

    // Create a textures
    var texture = createTexture(gl, layer, gl.TEXTURE0);
    var maskTexture = createTexture(gl, mask, gl.TEXTURE1);


    // Create a buffer and put a single clipspace rectangle in
    // it (2 triangles)
    var buffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
      0, 0,
      width, 0,
      0, height,
      0, height,
      width, 0,
      width, height]), gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.positionLocation);
    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);

    // draw
    gl.clearColor(0, 0, 0, 0);
    gl.enable(gl.BLEND);
    gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
    gl.clear(gl.COLOR_BUFFER_BIT);

    gl.drawArrays(gl.TRIANGLES, 0, 6);

    gl.flush();

    gl.deleteTexture(texture);
    gl.deleteTexture(maskTexture);
    gl.deleteBuffer(buffer);

    return canvas;
  }

  var figuresVertexShaderCode = '\
  attribute vec2 a_position;                                    \
  attribute vec3 a_color;                                       \
                                                                \
  uniform vec2 u_resolution;                                    \
  uniform vec2 u_scale;                                         \
  uniform vec2 u_offset;                                        \
                                                                \
  varying vec4 v_color;                                         \
                                                                \
  void main() {                                                 \
    vec2 position = (a_position + u_offset) * u_scale;          \
    vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0;     \
    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
                                                                \
    v_color = vec4(a_color / 255.0, 1.0);                       \
  }                                                             ';

  var figuresFragmentShaderCode = '\
  precision mediump float;                                      \
                                                                \
  varying vec4 v_color;                                         \
                                                                \
  void main() {                                                 \
    gl_FragColor = v_color;                                     \
  }                                                             ';

  var figuresCache = null;

  function initFiguresGL() {
    var canvas, gl;

    generateGL();
    canvas = currentCanvas;
    currentCanvas = null;
    gl = currentGL;
    currentGL = null;

    // setup a GLSL program
    var vertexShader = createVertexShader(gl, figuresVertexShaderCode);
    var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);
    var program = createProgram(gl, [vertexShader, fragmentShader]);
    gl.useProgram(program);

    var cache = {};
    cache.gl = gl;
    cache.canvas = canvas;
    cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
    cache.scaleLocation = gl.getUniformLocation(program, 'u_scale');
    cache.offsetLocation = gl.getUniformLocation(program, 'u_offset');
    cache.positionLocation = gl.getAttribLocation(program, 'a_position');
    cache.colorLocation = gl.getAttribLocation(program, 'a_color');

    figuresCache = cache;
  }

  function drawFigures(width, height, backgroundColor, figures, context) {
    if (!figuresCache) {
      initFiguresGL();
    }
    var cache = figuresCache, canvas = cache.canvas, gl = cache.gl;

    canvas.width = width;
    canvas.height = height;
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    gl.uniform2f(cache.resolutionLocation, width, height);

    // count triangle points
    var count = 0;
    var i, ii, rows;
    for (i = 0, ii = figures.length; i < ii; i++) {
      switch (figures[i].type) {
        case 'lattice':
          rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;
          count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;
          break;
        case 'triangles':
          count += figures[i].coords.length;
          break;
      }
    }
    // transfer data
    var coords = new Float32Array(count * 2);
    var colors = new Uint8Array(count * 3);
    var coordsMap = context.coords, colorsMap = context.colors;
    var pIndex = 0, cIndex = 0;
    for (i = 0, ii = figures.length; i < ii; i++) {
      var figure = figures[i], ps = figure.coords, cs = figure.colors;
      switch (figure.type) {
        case 'lattice':
          var cols = figure.verticesPerRow;
          rows = (ps.length / cols) | 0;
          for (var row = 1; row < rows; row++) {
            var offset = row * cols + 1;
            for (var col = 1; col < cols; col++, offset++) {
              coords[pIndex] = coordsMap[ps[offset - cols - 1]];
              coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];
              coords[pIndex + 2] = coordsMap[ps[offset - cols]];
              coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];
              coords[pIndex + 4] = coordsMap[ps[offset - 1]];
              coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];
              colors[cIndex] = colorsMap[cs[offset - cols - 1]];
              colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];
              colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];
              colors[cIndex + 3] = colorsMap[cs[offset - cols]];
              colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];
              colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];
              colors[cIndex + 6] = colorsMap[cs[offset - 1]];
              colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];
              colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];

              coords[pIndex + 6] = coords[pIndex + 2];
              coords[pIndex + 7] = coords[pIndex + 3];
              coords[pIndex + 8] = coords[pIndex + 4];
              coords[pIndex + 9] = coords[pIndex + 5];
              coords[pIndex + 10] = coordsMap[ps[offset]];
              coords[pIndex + 11] = coordsMap[ps[offset] + 1];
              colors[cIndex + 9] = colors[cIndex + 3];
              colors[cIndex + 10] = colors[cIndex + 4];
              colors[cIndex + 11] = colors[cIndex + 5];
              colors[cIndex + 12] = colors[cIndex + 6];
              colors[cIndex + 13] = colors[cIndex + 7];
              colors[cIndex + 14] = colors[cIndex + 8];
              colors[cIndex + 15] = colorsMap[cs[offset]];
              colors[cIndex + 16] = colorsMap[cs[offset] + 1];
              colors[cIndex + 17] = colorsMap[cs[offset] + 2];
              pIndex += 12;
              cIndex += 18;
            }
          }
          break;
        case 'triangles':
          for (var j = 0, jj = ps.length; j < jj; j++) {
            coords[pIndex] = coordsMap[ps[j]];
            coords[pIndex + 1] = coordsMap[ps[j] + 1];
            colors[cIndex] = colorsMap[cs[i]];
            colors[cIndex + 1] = colorsMap[cs[j] + 1];
            colors[cIndex + 2] = colorsMap[cs[j] + 2];
            pIndex += 2;
            cIndex += 3;
          }
          break;
      }
    }

    // draw
    if (backgroundColor) {
      gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255,
                    backgroundColor[2] / 255, 1.0);
    } else {
      gl.clearColor(0, 0, 0, 0);
    }
    gl.clear(gl.COLOR_BUFFER_BIT);

    var coordsBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.positionLocation);
    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);

    var colorsBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.colorLocation);
    gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false,
                           0, 0);

    gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);
    gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);

    gl.drawArrays(gl.TRIANGLES, 0, count);

    gl.flush();

    gl.deleteBuffer(coordsBuffer);
    gl.deleteBuffer(colorsBuffer);

    return canvas;
  }

  function cleanup() {
    if (smaskCache && smaskCache.canvas) {
      smaskCache.canvas.width = 0;
      smaskCache.canvas.height = 0;
    }
    if (figuresCache && figuresCache.canvas) {
      figuresCache.canvas.width = 0;
      figuresCache.canvas.height = 0;
    }
    smaskCache = null;
    figuresCache = null;
  }

  return {
    get isEnabled() {
      if (PDFJS.disableWebGL) {
        return false;
      }
      var enabled = false;
      try {
        generateGL();
        enabled = !!currentGL;
      } catch (e) { }
      return shadow(this, 'isEnabled', enabled);
    },
    composeSMask: composeSMask,
    drawFigures: drawFigures,
    clear: cleanup
  };
})();


var ShadingIRs = {};

ShadingIRs.RadialAxial = {
  fromIR: function RadialAxial_fromIR(raw) {
    var type = raw[1];
    var colorStops = raw[2];
    var p0 = raw[3];
    var p1 = raw[4];
    var r0 = raw[5];
    var r1 = raw[6];
    return {
      type: 'Pattern',
      getPattern: function RadialAxial_getPattern(ctx) {
        var grad;
        if (type === 'axial') {
          grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
        } else if (type === 'radial') {
          grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
        }

        for (var i = 0, ii = colorStops.length; i < ii; ++i) {
          var c = colorStops[i];
          grad.addColorStop(c[0], c[1]);
        }
        return grad;
      }
    };
  }
};

var createMeshCanvas = (function createMeshCanvasClosure() {
  function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {
    // Very basic Gouraud-shaded triangle rasterization algorithm.
    var coords = context.coords, colors = context.colors;
    var bytes = data.data, rowSize = data.width * 4;
    var tmp;
    if (coords[p1 + 1] > coords[p2 + 1]) {
      tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
    }
    if (coords[p2 + 1] > coords[p3 + 1]) {
      tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp;
    }
    if (coords[p1 + 1] > coords[p2 + 1]) {
      tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
    }
    var x1 = (coords[p1] + context.offsetX) * context.scaleX;
    var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;
    var x2 = (coords[p2] + context.offsetX) * context.scaleX;
    var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;
    var x3 = (coords[p3] + context.offsetX) * context.scaleX;
    var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;
    if (y1 >= y3) {
      return;
    }
    var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2];
    var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2];
    var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2];

    var minY = Math.round(y1), maxY = Math.round(y3);
    var xa, car, cag, cab;
    var xb, cbr, cbg, cbb;
    var k;
    for (var y = minY; y <= maxY; y++) {
      if (y < y2) {
        k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2);
        xa = x1 - (x1 - x2) * k;
        car = c1r - (c1r - c2r) * k;
        cag = c1g - (c1g - c2g) * k;
        cab = c1b - (c1b - c2b) * k;
      } else {
        k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3);
        xa = x2 - (x2 - x3) * k;
        car = c2r - (c2r - c3r) * k;
        cag = c2g - (c2g - c3g) * k;
        cab = c2b - (c2b - c3b) * k;
      }
      k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3);
      xb = x1 - (x1 - x3) * k;
      cbr = c1r - (c1r - c3r) * k;
      cbg = c1g - (c1g - c3g) * k;
      cbb = c1b - (c1b - c3b) * k;
      var x1_ = Math.round(Math.min(xa, xb));
      var x2_ = Math.round(Math.max(xa, xb));
      var j = rowSize * y + x1_ * 4;
      for (var x = x1_; x <= x2_; x++) {
        k = (xa - x) / (xa - xb);
        k = k < 0 ? 0 : k > 1 ? 1 : k;
        bytes[j++] = (car - (car - cbr) * k) | 0;
        bytes[j++] = (cag - (cag - cbg) * k) | 0;
        bytes[j++] = (cab - (cab - cbb) * k) | 0;
        bytes[j++] = 255;
      }
    }
  }

  function drawFigure(data, figure, context) {
    var ps = figure.coords;
    var cs = figure.colors;
    var i, ii;
    switch (figure.type) {
      case 'lattice':
        var verticesPerRow = figure.verticesPerRow;
        var rows = Math.floor(ps.length / verticesPerRow) - 1;
        var cols = verticesPerRow - 1;
        for (i = 0; i < rows; i++) {
          var q = i * verticesPerRow;
          for (var j = 0; j < cols; j++, q++) {
            drawTriangle(data, context,
              ps[q], ps[q + 1], ps[q + verticesPerRow],
              cs[q], cs[q + 1], cs[q + verticesPerRow]);
            drawTriangle(data, context,
              ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow],
              cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);
          }
        }
        break;
      case 'triangles':
        for (i = 0, ii = ps.length; i < ii; i += 3) {
          drawTriangle(data, context,
            ps[i], ps[i + 1], ps[i + 2],
            cs[i], cs[i + 1], cs[i + 2]);
        }
        break;
      default:
        error('illigal figure');
        break;
    }
  }

  function createMeshCanvas(bounds, combinesScale, coords, colors, figures,
                            backgroundColor) {
    // we will increase scale on some weird factor to let antialiasing take
    // care of "rough" edges
    var EXPECTED_SCALE = 1.1;
    // MAX_PATTERN_SIZE is used to avoid OOM situation.
    var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough

    var offsetX = Math.floor(bounds[0]);
    var offsetY = Math.floor(bounds[1]);
    var boundsWidth = Math.ceil(bounds[2]) - offsetX;
    var boundsHeight = Math.ceil(bounds[3]) - offsetY;

    var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] *
      EXPECTED_SCALE)), MAX_PATTERN_SIZE);
    var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] *
      EXPECTED_SCALE)), MAX_PATTERN_SIZE);
    var scaleX = boundsWidth / width;
    var scaleY = boundsHeight / height;

    var context = {
      coords: coords,
      colors: colors,
      offsetX: -offsetX,
      offsetY: -offsetY,
      scaleX: 1 / scaleX,
      scaleY: 1 / scaleY
    };

    var canvas, tmpCanvas, i, ii;
    if (WebGLUtils.isEnabled) {
      canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
                                      figures, context);

      // https://bugzilla.mozilla.org/show_bug.cgi?id=972126
      tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
      tmpCanvas.context.drawImage(canvas, 0, 0);
      canvas = tmpCanvas.canvas;
    } else {
      tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
      var tmpCtx = tmpCanvas.context;

      var data = tmpCtx.createImageData(width, height);
      if (backgroundColor) {
        var bytes = data.data;
        for (i = 0, ii = bytes.length; i < ii; i += 4) {
          bytes[i] = backgroundColor[0];
          bytes[i + 1] = backgroundColor[1];
          bytes[i + 2] = backgroundColor[2];
          bytes[i + 3] = 255;
        }
      }
      for (i = 0; i < figures.length; i++) {
        drawFigure(data, figures[i], context);
      }
      tmpCtx.putImageData(data, 0, 0);
      canvas = tmpCanvas.canvas;
    }

    return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
            scaleX: scaleX, scaleY: scaleY};
  }
  return createMeshCanvas;
})();

ShadingIRs.Mesh = {
  fromIR: function Mesh_fromIR(raw) {
    //var type = raw[1];
    var coords = raw[2];
    var colors = raw[3];
    var figures = raw[4];
    var bounds = raw[5];
    var matrix = raw[6];
    //var bbox = raw[7];
    var background = raw[8];
    return {
      type: 'Pattern',
      getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
        var scale;
        if (shadingFill) {
          scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
        } else {
          // Obtain scale from matrix and current transformation matrix.
          scale = Util.singularValueDecompose2dScale(owner.baseTransform);
          if (matrix) {
            var matrixScale = Util.singularValueDecompose2dScale(matrix);
            scale = [scale[0] * matrixScale[0],
                     scale[1] * matrixScale[1]];
          }
        }


        // Rasterizing on the main thread since sending/queue large canvases
        // might cause OOM.
        var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords,
          colors, figures, shadingFill ? null : background);

        if (!shadingFill) {
          ctx.setTransform.apply(ctx, owner.baseTransform);
          if (matrix) {
            ctx.transform.apply(ctx, matrix);
          }
        }

        ctx.translate(temporaryPatternCanvas.offsetX,
                      temporaryPatternCanvas.offsetY);
        ctx.scale(temporaryPatternCanvas.scaleX,
                  temporaryPatternCanvas.scaleY);

        return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
      }
    };
  }
};

ShadingIRs.Dummy = {
  fromIR: function Dummy_fromIR() {
    return {
      type: 'Pattern',
      getPattern: function Dummy_fromIR_getPattern() {
        return 'hotpink';
      }
    };
  }
};

function getShadingPatternFromIR(raw) {
  var shadingIR = ShadingIRs[raw[0]];
  if (!shadingIR) {
    error('Unknown IR type: ' + raw[0]);
  }
  return shadingIR.fromIR(raw);
}

var TilingPattern = (function TilingPatternClosure() {
  var PaintType = {
    COLORED: 1,
    UNCOLORED: 2
  };

  var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough

  function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
    this.operatorList = IR[2];
    this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
    this.bbox = IR[4];
    this.xstep = IR[5];
    this.ystep = IR[6];
    this.paintType = IR[7];
    this.tilingType = IR[8];
    this.color = color;
    this.objs = objs;
    this.commonObjs = commonObjs;
    this.baseTransform = baseTransform;
    this.type = 'Pattern';
    this.ctx = ctx;
  }

  TilingPattern.prototype = {
    createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
      var operatorList = this.operatorList;
      var bbox = this.bbox;
      var xstep = this.xstep;
      var ystep = this.ystep;
      var paintType = this.paintType;
      var tilingType = this.tilingType;
      var color = this.color;
      var objs = this.objs;
      var commonObjs = this.commonObjs;

      info('TilingType: ' + tilingType);

      var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];

      var topLeft = [x0, y0];
      // we want the canvas to be as large as the step size
      var botRight = [x0 + xstep, y0 + ystep];

      var width = botRight[0] - topLeft[0];
      var height = botRight[1] - topLeft[1];

      // Obtain scale from matrix and current transformation matrix.
      var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
      var curMatrixScale = Util.singularValueDecompose2dScale(
        this.baseTransform);
      var combinedScale = [matrixScale[0] * curMatrixScale[0],
        matrixScale[1] * curMatrixScale[1]];

      // MAX_PATTERN_SIZE is used to avoid OOM situation.
      // Use width and height values that are as close as possible to the end
      // result when the pattern is used. Too low value makes the pattern look
      // blurry. Too large value makes it look too crispy.
      width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
        MAX_PATTERN_SIZE);

      height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
        MAX_PATTERN_SIZE);

      var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true);
      var tmpCtx = tmpCanvas.context;
      var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
      graphics.groupLevel = owner.groupLevel;

      this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);

      this.setScale(width, height, xstep, ystep);
      this.transformToScale(graphics);

      // transform coordinates to pattern space
      var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
      graphics.transform.apply(graphics, tmpTranslate);

      this.clipBbox(graphics, bbox, x0, y0, x1, y1);

      graphics.executeOperatorList(operatorList);
      return tmpCanvas.canvas;
    },

    setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
      this.scale = [width / xstep, height / ystep];
    },

    transformToScale: function TilingPattern_transformToScale(graphics) {
      var scale = this.scale;
      var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
      graphics.transform.apply(graphics, tmpScale);
    },

    scaleToContext: function TilingPattern_scaleToContext() {
      var scale = this.scale;
      this.ctx.scale(1 / scale[0], 1 / scale[1]);
    },

    clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
      if (bbox && isArray(bbox) && bbox.length === 4) {
        var bboxWidth = x1 - x0;
        var bboxHeight = y1 - y0;
        graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);
        graphics.clip();
        graphics.endPath();
      }
    },

    setFillAndStrokeStyleToContext:
      function setFillAndStrokeStyleToContext(context, paintType, color) {
        switch (paintType) {
          case PaintType.COLORED:
            var ctx = this.ctx;
            context.fillStyle = ctx.fillStyle;
            context.strokeStyle = ctx.strokeStyle;
            break;
          case PaintType.UNCOLORED:
            var cssColor = Util.makeCssRgb(color[0], color[1], color[2]);
            context.fillStyle = cssColor;
            context.strokeStyle = cssColor;
            break;
          default:
            error('Unsupported paint type: ' + paintType);
        }
      },

    getPattern: function TilingPattern_getPattern(ctx, owner) {
      var temporaryPatternCanvas = this.createPatternCanvas(owner);

      ctx = this.ctx;
      ctx.setTransform.apply(ctx, this.baseTransform);
      ctx.transform.apply(ctx, this.matrix);
      this.scaleToContext();

      return ctx.createPattern(temporaryPatternCanvas, 'repeat');
    }
  };

  return TilingPattern;
})();


PDFJS.disableFontFace = false;

var FontLoader = {
  insertRule: function fontLoaderInsertRule(rule) {
    var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
    if (!styleElement) {
      styleElement = document.createElement('style');
      styleElement.id = 'PDFJS_FONT_STYLE_TAG';
      document.documentElement.getElementsByTagName('head')[0].appendChild(
        styleElement);
    }

    var styleSheet = styleElement.sheet;
    styleSheet.insertRule(rule, styleSheet.cssRules.length);
  },

  clear: function fontLoaderClear() {
    var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
    if (styleElement) {
      styleElement.parentNode.removeChild(styleElement);
    }
    this.nativeFontFaces.forEach(function(nativeFontFace) {
      document.fonts.delete(nativeFontFace);
    });
    this.nativeFontFaces.length = 0;
  },
  get loadTestFont() {
    // This is a CFF font with 1 glyph for '.' that fills its entire width and
    // height.
    return shadow(this, 'loadTestFont', atob(
      'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
      'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
      'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
      'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
      'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
      'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
      'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
      'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
      'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
      'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
      'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
      'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
      'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
      'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
      'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
      'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
      'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
      'ABAAAAAAAAAAAD6AAAAAAAAA=='
    ));
  },

  loadTestFontId: 0,

  loadingContext: {
    requests: [],
    nextRequestId: 0
  },

  isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() {
    if (isWorker) {
      return false;
    }

    // User agent string sniffing is bad, but there is no reliable way to tell
    // if font is fully loaded and ready to be used with canvas.
    var userAgent = window.navigator.userAgent;
    var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
    if (m && m[1] >= 14) {
      return true;
    }
    // TODO other browsers
    if (userAgent === 'node') {
      return true;
    }
    return false;
  })(),

  nativeFontFaces: [],

  isFontLoadingAPISupported: (!isWorker && typeof document !== 'undefined' &&
                              !!document.fonts),

  addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) {
    this.nativeFontFaces.push(nativeFontFace);
    document.fonts.add(nativeFontFace);
  },

  bind: function fontLoaderBind(fonts, callback) {
    assert(!isWorker, 'bind() shall be called from main thread');

    var rules = [];
    var fontsToLoad = [];
    var fontLoadPromises = [];
    for (var i = 0, ii = fonts.length; i < ii; i++) {
      var font = fonts[i];

      // Add the font to the DOM only once or skip if the font
      // is already loaded.
      if (font.attached || font.loading === false) {
        continue;
      }
      font.attached = true;

      if (this.isFontLoadingAPISupported) {
        var nativeFontFace = font.createNativeFontFace();
        if (nativeFontFace) {
          fontLoadPromises.push(nativeFontFace.loaded);
        }
      } else {
        var rule = font.bindDOM();
        if (rule) {
          rules.push(rule);
          fontsToLoad.push(font);
        }
      }
    }

    var request = FontLoader.queueLoadingCallback(callback);
    if (this.isFontLoadingAPISupported) {
      Promise.all(fontsToLoad).then(function() {
        request.complete();
      });
    } else if (rules.length > 0 && !this.isSyncFontLoadingSupported) {
      FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request);
    } else {
      request.complete();
    }
  },

  queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
    function LoadLoader_completeRequest() {
      assert(!request.end, 'completeRequest() cannot be called twice');
      request.end = Date.now();

      // sending all completed requests in order how they were queued
      while (context.requests.length > 0 && context.requests[0].end) {
        var otherRequest = context.requests.shift();
        setTimeout(otherRequest.callback, 0);
      }
    }

    var context = FontLoader.loadingContext;
    var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
    var request = {
      id: requestId,
      complete: LoadLoader_completeRequest,
      callback: callback,
      started: Date.now()
    };
    context.requests.push(request);
    return request;
  },

  prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
                                                                fonts,
                                                                request) {
      /** Hack begin */
      // There's currently no event when a font has finished downloading so the
      // following code is a dirty hack to 'guess' when a font is
      // ready. It's assumed fonts are loaded in order, so add a known test
      // font after the desired fonts and then test for the loading of that
      // test font.

      function int32(data, offset) {
        return (data.charCodeAt(offset) << 24) |
               (data.charCodeAt(offset + 1) << 16) |
               (data.charCodeAt(offset + 2) << 8) |
               (data.charCodeAt(offset + 3) & 0xff);
      }

      function spliceString(s, offset, remove, insert) {
        var chunk1 = s.substr(0, offset);
        var chunk2 = s.substr(offset + remove);
        return chunk1 + insert + chunk2;
      }

      var i, ii;

      var canvas = document.createElement('canvas');
      canvas.width = 1;
      canvas.height = 1;
      var ctx = canvas.getContext('2d');

      var called = 0;
      function isFontReady(name, callback) {
        called++;
        // With setTimeout clamping this gives the font ~100ms to load.
        if(called > 30) {
          warn('Load test font never loaded.');
          callback();
          return;
        }
        ctx.font = '30px ' + name;
        ctx.fillText('.', 0, 20);
        var imageData = ctx.getImageData(0, 0, 1, 1);
        if (imageData.data[3] > 0) {
          callback();
          return;
        }
        setTimeout(isFontReady.bind(null, name, callback));
      }

      var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
      // Chromium seems to cache fonts based on a hash of the actual font data,
      // so the font must be modified for each load test else it will appear to
      // be loaded already.
      // TODO: This could maybe be made faster by avoiding the btoa of the full
      // font by splitting it in chunks before hand and padding the font id.
      var data = this.loadTestFont;
      var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
      data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
                          loadTestFontId);
      // CFF checksum is important for IE, adjusting it
      var CFF_CHECKSUM_OFFSET = 16;
      var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
      var checksum = int32(data, CFF_CHECKSUM_OFFSET);
      for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
        checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
      }
      if (i < loadTestFontId.length) { // align to 4 bytes boundary
        checksum = (checksum - XXXX_VALUE +
                    int32(loadTestFontId + 'XXX', i)) | 0;
      }
      data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));

      var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
      var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
                 url + '}';
      FontLoader.insertRule(rule);

      var names = [];
      for (i = 0, ii = fonts.length; i < ii; i++) {
        names.push(fonts[i].loadedName);
      }
      names.push(loadTestFontId);

      var div = document.createElement('div');
      div.setAttribute('style',
                       'visibility: hidden;' +
                       'width: 10px; height: 10px;' +
                       'position: absolute; top: 0px; left: 0px;');
      for (i = 0, ii = names.length; i < ii; ++i) {
        var span = document.createElement('span');
        span.textContent = 'Hi';
        span.style.fontFamily = names[i];
        div.appendChild(span);
      }
      document.body.appendChild(div);

      isFontReady(loadTestFontId, function() {
        document.body.removeChild(div);
        request.complete();
      });
      /** Hack end */
  }
};

var FontFaceObject = (function FontFaceObjectClosure() {
  function FontFaceObject(name, file, properties) {
    this.compiledGlyphs = {};
    if (arguments.length === 1) {
      // importing translated data
      var data = arguments[0];
      for (var i in data) {
        this[i] = data[i];
      }
      return;
    }
  }
  FontFaceObject.prototype = {
    createNativeFontFace: function FontFaceObject_createNativeFontFace() {
      if (!this.data) {
        return null;
      }

      if (PDFJS.disableFontFace) {
        this.disableFontFace = true;
        return null;
      }

      var nativeFontFace = new FontFace(this.loadedName, this.data, {});

      FontLoader.addNativeFontFace(nativeFontFace);

      if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
          globalScope['FontInspector'].enabled) {
        globalScope['FontInspector'].fontAdded(this);
      }
      return nativeFontFace;
    },

    bindDOM: function FontFaceObject_bindDOM() {
      if (!this.data) {
        return null;
      }

      if (PDFJS.disableFontFace) {
        this.disableFontFace = true;
        return null;
      }

      var data = bytesToString(new Uint8Array(this.data));
      var fontName = this.loadedName;

      // Add the font-face rule to the document
      var url = ('url(data:' + this.mimetype + ';base64,' +
                 window.btoa(data) + ');');
      var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
      FontLoader.insertRule(rule);

      if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
          globalScope['FontInspector'].enabled) {
        globalScope['FontInspector'].fontAdded(this, url);
      }

      return rule;
    },

    getPathGenerator: function FontLoader_getPathGenerator(objs, character) {
      if (!(character in this.compiledGlyphs)) {
        var js = objs.get(this.loadedName + '_path_' + character);
        /*jshint -W054 */
        this.compiledGlyphs[character] = new Function('c', 'size', js);
      }
      return this.compiledGlyphs[character];
    }
  };
  return FontFaceObject;
})();


var ANNOT_MIN_SIZE = 10; // px

var AnnotationUtils = (function AnnotationUtilsClosure() {
  // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont()
  function setTextStyles(element, item, fontObj) {

    var style = element.style;
    style.fontSize = item.fontSize + 'px';
    style.direction = item.fontDirection < 0 ? 'rtl': 'ltr';

    if (!fontObj) {
      return;
    }

    style.fontWeight = fontObj.black ?
      (fontObj.bold ? 'bolder' : 'bold') :
      (fontObj.bold ? 'bold' : 'normal');
    style.fontStyle = fontObj.italic ? 'italic' : 'normal';

    var fontName = fontObj.loadedName;
    var fontFamily = fontName ? '"' + fontName + '", ' : '';
    // Use a reasonable default font if the font doesn't specify a fallback
    var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif';
    style.fontFamily = fontFamily + fallbackName;
  }

  function initContainer(item, drawBorder) {
    var container = document.createElement('section');
    var cstyle = container.style;
    var width = item.rect[2] - item.rect[0];
    var height = item.rect[3] - item.rect[1];

    var bWidth = item.borderWidth || 0;
    if (bWidth) {
      width = width - 2 * bWidth;
      height = height - 2 * bWidth;
      cstyle.borderWidth = bWidth + 'px';
      var color = item.color;
      if (drawBorder && color) {
        cstyle.borderStyle = 'solid';
        cstyle.borderColor = Util.makeCssRgb(Math.round(color[0] * 255),
                                             Math.round(color[1] * 255),
                                             Math.round(color[2] * 255));
      }
    }
    cstyle.width = width + 'px';
    cstyle.height = height + 'px';
    return container;
  }

  function getHtmlElementForTextWidgetAnnotation(item, commonObjs) {
    var element = document.createElement('div');
    var width = item.rect[2] - item.rect[0];
    var height = item.rect[3] - item.rect[1];
    element.style.width = width + 'px';
    element.style.height = height + 'px';
    element.style.display = 'table';

    var content = document.createElement('div');
    content.textContent = item.fieldValue;
    var textAlignment = item.textAlignment;
    content.style.textAlign = ['left', 'center', 'right'][textAlignment];
    content.style.verticalAlign = 'middle';
    content.style.display = 'table-cell';

    var fontObj = item.fontRefName ?
      commonObjs.getData(item.fontRefName) : null;
    setTextStyles(content, item, fontObj);

    element.appendChild(content);

    return element;
  }

  function getHtmlElementForTextAnnotation(item) {
    var rect = item.rect;

    // sanity check because of OOo-generated PDFs
    if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
      rect[3] = rect[1] + ANNOT_MIN_SIZE;
    }
    if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
      rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
    }

    var container = initContainer(item, false);
    container.className = 'annotText';

    var image  = document.createElement('img');
    image.style.height = container.style.height;
    image.style.width = container.style.width;
    var iconName = item.name;
    image.src = PDFJS.imageResourcesPath + 'annotation-' +
      iconName.toLowerCase() + '.svg';
    image.alt = '[{{type}} Annotation]';
    image.dataset.l10nId = 'text_annotation_type';
    image.dataset.l10nArgs = JSON.stringify({type: iconName});

    var contentWrapper = document.createElement('div');
    contentWrapper.className = 'annotTextContentWrapper';
    contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px';
    contentWrapper.style.top = '-10px';

    var content = document.createElement('div');
    content.className = 'annotTextContent';
    content.setAttribute('hidden', true);

    var i, ii;
    if (item.hasBgColor) {
      var color = item.color;

      // Enlighten the color (70%)
      var BACKGROUND_ENLIGHT = 0.7;
      var r = BACKGROUND_ENLIGHT * (1.0 - color[0]) + color[0];
      var g = BACKGROUND_ENLIGHT * (1.0 - color[1]) + color[1];
      var b = BACKGROUND_ENLIGHT * (1.0 - color[2]) + color[2];
      content.style.backgroundColor = Util.makeCssRgb((r * 255) | 0,
                                                      (g * 255) | 0,
                                                      (b * 255) | 0);
    }

    var title = document.createElement('h1');
    var text = document.createElement('p');
    title.textContent = item.title;

    if (!item.content && !item.title) {
      content.setAttribute('hidden', true);
    } else {
      var e = document.createElement('span');
      var lines = item.content.split(/(?:\r\n?|\n)/);
      for (i = 0, ii = lines.length; i < ii; ++i) {
        var line = lines[i];
        e.appendChild(document.createTextNode(line));
        if (i < (ii - 1)) {
          e.appendChild(document.createElement('br'));
        }
      }
      text.appendChild(e);

      var pinned = false;

      var showAnnotation = function showAnnotation(pin) {
        if (pin) {
          pinned = true;
        }
        if (content.hasAttribute('hidden')) {
          container.style.zIndex += 1;
          content.removeAttribute('hidden');
        }
      };

      var hideAnnotation = function hideAnnotation(unpin) {
        if (unpin) {
          pinned = false;
        }
        if (!content.hasAttribute('hidden') && !pinned) {
          container.style.zIndex -= 1;
          content.setAttribute('hidden', true);
        }
      };

      var toggleAnnotation = function toggleAnnotation() {
        if (pinned) {
          hideAnnotation(true);
        } else {
          showAnnotation(true);
        }
      };

      image.addEventListener('click', function image_clickHandler() {
        toggleAnnotation();
      }, false);
      image.addEventListener('mouseover', function image_mouseOverHandler() {
        showAnnotation();
      }, false);
      image.addEventListener('mouseout', function image_mouseOutHandler() {
        hideAnnotation();
      }, false);

      content.addEventListener('click', function content_clickHandler() {
        hideAnnotation(true);
      }, false);
    }

    content.appendChild(title);
    content.appendChild(text);
    contentWrapper.appendChild(content);
    container.appendChild(image);
    container.appendChild(contentWrapper);

    return container;
  }

  function getHtmlElementForLinkAnnotation(item) {
    var container = initContainer(item, true);
    container.className = 'annotLink';

    var link = document.createElement('a');
    link.href = link.title = item.url || '';
    if (item.url && PDFJS.openExternalLinksInNewWindow) {
      link.target = '_blank';
    }
    
    if (link.hostname !== window.location.hostname) {
         link = document.createElement('div');
    }

    container.appendChild(link);

    return container;
  }

  function getHtmlElement(data, objs) {
    switch (data.annotationType) {
      case AnnotationType.WIDGET:
        return getHtmlElementForTextWidgetAnnotation(data, objs);
      case AnnotationType.TEXT:
        return getHtmlElementForTextAnnotation(data);
      case AnnotationType.LINK:
        return getHtmlElementForLinkAnnotation(data);
      default:
        throw new Error('Unsupported annotationType: ' + data.annotationType);
    }
  }

  return {
    getHtmlElement: getHtmlElement
  };
})();
PDFJS.AnnotationUtils = AnnotationUtils;


var SVG_DEFAULTS = {
  fontStyle: 'normal',
  fontWeight: 'normal',
  fillColor: '#000000'
};

var convertImgDataToPng = (function convertImgDataToPngClosure() {
  var PNG_HEADER =
    new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);

  var CHUNK_WRAPPER_SIZE = 12;

  var crcTable = new Int32Array(256);
  for (var i = 0; i < 256; i++) {
    var c = i;
    for (var h = 0; h < 8; h++) {
      if (c & 1) {
        c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff);
      } else {
        c = (c >> 1) & 0x7fffffff;
      }
    }
    crcTable[i] = c;
  }

  function crc32(data, start, end) {
    var crc = -1;
    for (var i = start; i < end; i++) {
      var a = (crc ^ data[i]) & 0xff;
      var b = crcTable[a];
      crc = (crc >>> 8) ^ b;
    }
    return crc ^ -1;
  }

  function writePngChunk(type, body, data, offset) {
    var p = offset;
    var len = body.length;

    data[p] = len >> 24 & 0xff;
    data[p + 1] = len >> 16 & 0xff;
    data[p + 2] = len >> 8 & 0xff;
    data[p + 3] = len & 0xff;
    p += 4;

    data[p] = type.charCodeAt(0) & 0xff;
    data[p + 1] = type.charCodeAt(1) & 0xff;
    data[p + 2] = type.charCodeAt(2) & 0xff;
    data[p + 3] = type.charCodeAt(3) & 0xff;
    p += 4;

    data.set(body, p);
    p += body.length;

    var crc = crc32(data, offset + 4, p);

    data[p] = crc >> 24 & 0xff;
    data[p + 1] = crc >> 16 & 0xff;
    data[p + 2] = crc >> 8 & 0xff;
    data[p + 3] = crc & 0xff;
  }

  function adler32(data, start, end) {
    var a = 1;
    var b = 0;
    for (var i = start; i < end; ++i) {
      a = (a + (data[i] & 0xff)) % 65521;
      b = (b + a) % 65521;
    }
    return (b << 16) | a;
  }

  function encode(imgData, kind) {
    var width = imgData.width;
    var height = imgData.height;
    var bitDepth, colorType, lineSize;
    var bytes = imgData.data;

    switch (kind) {
      case ImageKind.GRAYSCALE_1BPP:
        colorType = 0;
        bitDepth = 1;
        lineSize = (width + 7) >> 3;
        break;
      case ImageKind.RGB_24BPP:
        colorType = 2;
        bitDepth = 8;
        lineSize = width * 3;
        break;
      case ImageKind.RGBA_32BPP:
        colorType = 6;
        bitDepth = 8;
        lineSize = width * 4;
        break;
      default:
        throw new Error('invalid format');
    }

    // prefix every row with predictor 0
    var literals = new Uint8Array((1 + lineSize) * height);
    var offsetLiterals = 0, offsetBytes = 0;
    var y, i;
    for (y = 0; y < height; ++y) {
      literals[offsetLiterals++] = 0; // no prediction
      literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize),
                   offsetLiterals);
      offsetBytes += lineSize;
      offsetLiterals += lineSize;
    }

    if (kind === ImageKind.GRAYSCALE_1BPP) {
      // inverting for B/W
      offsetLiterals = 0;
      for (y = 0; y < height; y++) {
        offsetLiterals++; // skipping predictor
        for (i = 0; i < lineSize; i++) {
          literals[offsetLiterals++] ^= 0xFF;
        }
      }
    }

    var ihdr = new Uint8Array([
      width >> 24 & 0xff,
      width >> 16 & 0xff,
      width >> 8 & 0xff,
      width & 0xff,
      height >> 24 & 0xff,
      height >> 16 & 0xff,
      height >> 8 & 0xff,
      height & 0xff,
      bitDepth, // bit depth
      colorType, // color type
      0x00, // compression method
      0x00, // filter method
      0x00 // interlace method
    ]);

    var len = literals.length;
    var maxBlockLength = 0xFFFF;

    var deflateBlocks = Math.ceil(len / maxBlockLength);
    var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);
    var pi = 0;
    idat[pi++] = 0x78; // compression method and flags
    idat[pi++] = 0x9c; // flags

    var pos = 0;
    while (len > maxBlockLength) {
      // writing non-final DEFLATE blocks type 0 and length of 65535
      idat[pi++] = 0x00;
      idat[pi++] = 0xff;
      idat[pi++] = 0xff;
      idat[pi++] = 0x00;
      idat[pi++] = 0x00;
      idat.set(literals.subarray(pos, pos + maxBlockLength), pi);
      pi += maxBlockLength;
      pos += maxBlockLength;
      len -= maxBlockLength;
    }

    // writing non-final DEFLATE blocks type 0
    idat[pi++] = 0x01;
    idat[pi++] = len & 0xff;
    idat[pi++] = len >> 8 & 0xff;
    idat[pi++] = (~len & 0xffff) & 0xff;
    idat[pi++] = (~len & 0xffff) >> 8 & 0xff;
    idat.set(literals.subarray(pos), pi);
    pi += literals.length - pos;

    var adler = adler32(literals, 0, literals.length); // checksum
    idat[pi++] = adler >> 24 & 0xff;
    idat[pi++] = adler >> 16 & 0xff;
    idat[pi++] = adler >> 8 & 0xff;
    idat[pi++] = adler & 0xff;

    // PNG will consists: header, IHDR+data, IDAT+data, and IEND.
    var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) +
                    ihdr.length + idat.length;
    var data = new Uint8Array(pngLength);
    var offset = 0;
    data.set(PNG_HEADER, offset);
    offset += PNG_HEADER.length;
    writePngChunk('IHDR', ihdr, data, offset);
    offset += CHUNK_WRAPPER_SIZE + ihdr.length;
    writePngChunk('IDATA', idat, data, offset);
    offset += CHUNK_WRAPPER_SIZE + idat.length;
    writePngChunk('IEND', new Uint8Array(0), data, offset);

    return PDFJS.createObjectURL(data, 'image/png');
  }

  return function convertImgDataToPng(imgData) {
    var kind = (imgData.kind === undefined ?
                ImageKind.GRAYSCALE_1BPP : imgData.kind);
    return encode(imgData, kind);
  };
})();

var SVGExtraState = (function SVGExtraStateClosure() {
  function SVGExtraState() {
    this.fontSizeScale = 1;
    this.fontWeight = SVG_DEFAULTS.fontWeight;
    this.fontSize = 0;

    this.textMatrix = IDENTITY_MATRIX;
    this.fontMatrix = FONT_IDENTITY_MATRIX;
    this.leading = 0;

    // Current point (in user coordinates)
    this.x = 0;
    this.y = 0;

    // Start of text line (in text coordinates)
    this.lineX = 0;
    this.lineY = 0;

    // Character and word spacing
    this.charSpacing = 0;
    this.wordSpacing = 0;
    this.textHScale = 1;
    this.textRise = 0;

    // Default foreground and background colors
    this.fillColor = SVG_DEFAULTS.fillColor;
    this.strokeColor = '#000000';

    this.fillAlpha = 1;
    this.strokeAlpha = 1;
    this.lineWidth = 1;
    this.lineJoin = '';
    this.lineCap = '';
    this.miterLimit = 0;

    this.dashArray = [];
    this.dashPhase = 0;

    this.dependencies = [];

    // Clipping
    this.clipId = '';
    this.pendingClip = false;

    this.maskId = '';
  }

  SVGExtraState.prototype = {
    clone: function SVGExtraState_clone() {
      return Object.create(this);
    },
    setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) {
      this.x = x;
      this.y = y;
    }
  };
  return SVGExtraState;
})();

var SVGGraphics = (function SVGGraphicsClosure() {
  function createScratchSVG(width, height) {
    var NS = 'http://www.w3.org/2000/svg';
    var svg = document.createElementNS(NS, 'svg:svg');
    svg.setAttributeNS(null, 'version', '1.1');
    svg.setAttributeNS(null, 'width', width + 'px');
    svg.setAttributeNS(null, 'height', height + 'px');
    svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height);
    return svg;
  }

  function opListToTree(opList) {
    var opTree = [];
    var tmp = [];
    var opListLen = opList.length;

    for (var x = 0; x < opListLen; x++) {
      if (opList[x].fn === 'save') {
        opTree.push({'fnId': 92, 'fn': 'group', 'items': []});
        tmp.push(opTree);
        opTree = opTree[opTree.length - 1].items;
        continue;
      }

      if(opList[x].fn === 'restore') {
        opTree = tmp.pop();
      } else {
        opTree.push(opList[x]);
      }
    }
    return opTree;
  }

  /**
   * Formats float number.
   * @param value {number} number to format.
   * @returns {string}
   */
  function pf(value) {
    if (value === (value | 0)) { // integer number
      return value.toString();
    }
    var s = value.toFixed(10);
    var i = s.length - 1;
    if (s[i] !== '0') {
      return s;
    }
    // removing trailing zeros
    do {
      i--;
    } while (s[i] === '0');
    return s.substr(0, s[i] === '.' ? i : i + 1);
  }

  /**
   * Formats transform matrix. The standard rotation, scale and translate
   * matrices are replaced by their shorter forms, and for identity matrix
   * returns empty string to save the memory.
   * @param m {Array} matrix to format.
   * @returns {string}
   */
  function pm(m) {
    if (m[4] === 0 && m[5] === 0) {
      if (m[1] === 0 && m[2] === 0) {
        if (m[0] === 1 && m[3] === 1) {
          return '';
        }
        return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')';
      }
      if (m[0] === m[3] && m[1] === -m[2]) {
        var a = Math.acos(m[0]) * 180 / Math.PI;
        return 'rotate(' + pf(a) + ')';
      }
    } else {
      if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) {
        return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')';
      }
    }
    return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' +
      pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')';
  }

  function SVGGraphics(commonObjs, objs) {
    this.current = new SVGExtraState();
    this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix
    this.transformStack = [];
    this.extraStack = [];
    this.commonObjs = commonObjs;
    this.objs = objs;
    this.pendingEOFill = false;

    this.embedFonts = false;
    this.embeddedFonts = {};
    this.cssStyle = null;
  }

  var NS = 'http://www.w3.org/2000/svg';
  var XML_NS = 'http://www.w3.org/XML/1998/namespace';
  var XLINK_NS = 'http://www.w3.org/1999/xlink';
  var LINE_CAP_STYLES = ['butt', 'round', 'square'];
  var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
  var clipCount = 0;
  var maskCount = 0;

  SVGGraphics.prototype = {
    save: function SVGGraphics_save() {
      this.transformStack.push(this.transformMatrix);
      var old = this.current;
      this.extraStack.push(old);
      this.current = old.clone();
    },

    restore: function SVGGraphics_restore() {
      this.transformMatrix = this.transformStack.pop();
      this.current = this.extraStack.pop();

      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
      this.pgrp.appendChild(this.tgrp);
    },

    group: function SVGGraphics_group(items) {
      this.save();
      this.executeOpTree(items);
      this.restore();
    },

    loadDependencies: function SVGGraphics_loadDependencies(operatorList) {
      var fnArray = operatorList.fnArray;
      var fnArrayLen = fnArray.length;
      var argsArray = operatorList.argsArray;

      var self = this;
      for (var i = 0; i < fnArrayLen; i++) {
        if (OPS.dependency === fnArray[i]) {
          var deps = argsArray[i];
          for (var n = 0, nn = deps.length; n < nn; n++) {
            var obj = deps[n];
            var common = obj.substring(0, 2) === 'g_';
            var promise;
            if (common) {
              promise = new Promise(function(resolve) {
                self.commonObjs.get(obj, resolve);
              });
            } else {
              promise = new Promise(function(resolve) {
                self.objs.get(obj, resolve);
              });
            }
            this.current.dependencies.push(promise);
          }
        }
      }
      return Promise.all(this.current.dependencies);
    },

    transform: function SVGGraphics_transform(a, b, c, d, e, f) {
      var transformMatrix = [a, b, c, d, e, f];
      this.transformMatrix = PDFJS.Util.transform(this.transformMatrix,
                                                  transformMatrix);

      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

    getSVG: function SVGGraphics_getSVG(operatorList, viewport) {
      this.svg = createScratchSVG(viewport.width, viewport.height);
      this.viewport = viewport;

      return this.loadDependencies(operatorList).then(function () {
        this.transformMatrix = IDENTITY_MATRIX;
        this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group
        this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform));
        this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group
        this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
        this.defs = document.createElementNS(NS, 'svg:defs');
        this.pgrp.appendChild(this.defs);
        this.pgrp.appendChild(this.tgrp);
        this.svg.appendChild(this.pgrp);
        var opTree = this.convertOpList(operatorList);
        this.executeOpTree(opTree);
        return this.svg;
      }.bind(this));
    },

    convertOpList: function SVGGraphics_convertOpList(operatorList) {
      var argsArray = operatorList.argsArray;
      var fnArray = operatorList.fnArray;
      var fnArrayLen  = fnArray.length;
      var REVOPS = [];
      var opList = [];

      for (var op in OPS) {
        REVOPS[OPS[op]] = op;
      }

      for (var x = 0; x < fnArrayLen; x++) {
        var fnId = fnArray[x];
        opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]});
      }
      return opListToTree(opList);
    },

    executeOpTree: function SVGGraphics_executeOpTree(opTree) {
      var opTreeLen = opTree.length;
      for(var x = 0; x < opTreeLen; x++) {
        var fn = opTree[x].fn;
        var fnId = opTree[x].fnId;
        var args = opTree[x].args;

        switch (fnId | 0) {
          case OPS.beginText:
            this.beginText();
            break;
          case OPS.setLeading:
            this.setLeading(args);
            break;
          case OPS.setLeadingMoveText:
            this.setLeadingMoveText(args[0], args[1]);
            break;
          case OPS.setFont:
            this.setFont(args);
            break;
          case OPS.showText:
            this.showText(args[0]);
            break;
          case OPS.showSpacedText:
            this.showText(args[0]);
            break;
          case OPS.endText:
            this.endText();
            break;
          case OPS.moveText:
            this.moveText(args[0], args[1]);
            break;
          case OPS.setCharSpacing:
            this.setCharSpacing(args[0]);
            break;
          case OPS.setWordSpacing:
            this.setWordSpacing(args[0]);
            break;
          case OPS.setHScale:
            this.setHScale(args[0]);
            break;
          case OPS.setTextMatrix:
            this.setTextMatrix(args[0], args[1], args[2],
                               args[3], args[4], args[5]);
            break;
          case OPS.setLineWidth:
            this.setLineWidth(args[0]);
            break;
          case OPS.setLineJoin:
            this.setLineJoin(args[0]);
            break;
          case OPS.setLineCap:
            this.setLineCap(args[0]);
            break;
          case OPS.setMiterLimit:
            this.setMiterLimit(args[0]);
            break;
          case OPS.setFillRGBColor:
            this.setFillRGBColor(args[0], args[1], args[2]);
            break;
          case OPS.setStrokeRGBColor:
            this.setStrokeRGBColor(args[0], args[1], args[2]);
            break;
          case OPS.setDash:
            this.setDash(args[0], args[1]);
            break;
          case OPS.setGState:
            this.setGState(args[0]);
            break;
          case OPS.fill:
            this.fill();
            break;
          case OPS.eoFill:
            this.eoFill();
            break;
          case OPS.stroke:
            this.stroke();
            break;
          case OPS.fillStroke:
            this.fillStroke();
            break;
          case OPS.eoFillStroke:
            this.eoFillStroke();
            break;
          case OPS.clip:
            this.clip('nonzero');
            break;
          case OPS.eoClip:
            this.clip('evenodd');
            break;
          case OPS.paintSolidColorImageMask:
            this.paintSolidColorImageMask();
            break;
          case OPS.paintJpegXObject:
            this.paintJpegXObject(args[0], args[1], args[2]);
            break;
          case OPS.paintImageXObject:
            this.paintImageXObject(args[0]);
            break;
          case OPS.paintInlineImageXObject:
            this.paintInlineImageXObject(args[0]);
            break;
          case OPS.paintImageMaskXObject:
            this.paintImageMaskXObject(args[0]);
            break;
          case OPS.paintFormXObjectBegin:
            this.paintFormXObjectBegin(args[0], args[1]);
            break;
          case OPS.paintFormXObjectEnd:
            this.paintFormXObjectEnd();
            break;
          case OPS.closePath:
            this.closePath();
            break;
          case OPS.closeStroke:
            this.closeStroke();
            break;
          case OPS.closeFillStroke:
            this.closeFillStroke();
            break;
          case OPS.nextLine:
            this.nextLine();
            break;
          case OPS.transform:
            this.transform(args[0], args[1], args[2], args[3],
                           args[4], args[5]);
            break;
          case OPS.constructPath:
            this.constructPath(args[0], args[1]);
            break;
          case OPS.endPath:
            this.endPath();
            break;
          case 92:
            this.group(opTree[x].items);
            break;
          default:
            warn('Unimplemented method '+ fn);
            break;
        }
      }
    },

    setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) {
      this.current.wordSpacing = wordSpacing;
    },

    setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) {
      this.current.charSpacing = charSpacing;
    },

    nextLine: function SVGGraphics_nextLine() {
      this.moveText(0, this.current.leading);
    },

    setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) {
      var current = this.current;
      this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f];

      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;

      current.xcoords = [];
      current.tspan = document.createElementNS(NS, 'svg:tspan');
      current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
      current.tspan.setAttributeNS(null, 'font-size',
                                   pf(current.fontSize) + 'px');
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));

      current.txtElement = document.createElementNS(NS, 'svg:text');
      current.txtElement.appendChild(current.tspan);
    },

    beginText: function SVGGraphics_beginText() {
      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
      this.current.textMatrix = IDENTITY_MATRIX;
      this.current.lineMatrix = IDENTITY_MATRIX;
      this.current.tspan = document.createElementNS(NS, 'svg:tspan');
      this.current.txtElement = document.createElementNS(NS, 'svg:text');
      this.current.txtgrp = document.createElementNS(NS, 'svg:g');
      this.current.xcoords = [];
    },

    moveText: function SVGGraphics_moveText(x, y) {
      var current = this.current;
      this.current.x = this.current.lineX += x;
      this.current.y = this.current.lineY += y;

      current.xcoords = [];
      current.tspan = document.createElementNS(NS, 'svg:tspan');
      current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
      current.tspan.setAttributeNS(null, 'font-size',
                                   pf(current.fontSize) + 'px');
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));
    },

    showText: function SVGGraphics_showText(glyphs) {
      var current = this.current;
      var font = current.font;
      var fontSize = current.fontSize;

      if (fontSize === 0) {
        return;
      }

      var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var fontDirection = current.fontDirection;
      var textHScale = current.textHScale * fontDirection;
      var glyphsLength = glyphs.length;
      var vertical = font.vertical;
      var widthAdvanceScale = fontSize * current.fontMatrix[0];

      var x = 0, i;
      for (i = 0; i < glyphsLength; ++i) {
        var glyph = glyphs[i];
        if (glyph === null) {
          // word break
          x += fontDirection * wordSpacing;
          continue;
        } else if (isNum(glyph)) {
          x += -glyph * fontSize * 0.001;
          continue;
        }
        current.xcoords.push(current.x + x * textHScale);

        var width = glyph.width;
        var character = glyph.fontChar;
        var charWidth = width * widthAdvanceScale + charSpacing * fontDirection;
        x += charWidth;

        current.tspan.textContent += character;
      }
      if (vertical) {
        current.y -= x * textHScale;
      } else {
        current.x += x * textHScale;
      }

      current.tspan.setAttributeNS(null, 'x',
                                   current.xcoords.map(pf).join(' '));
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));
      current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
      current.tspan.setAttributeNS(null, 'font-size',
                                   pf(current.fontSize) + 'px');
      if (current.fontStyle !== SVG_DEFAULTS.fontStyle) {
        current.tspan.setAttributeNS(null, 'font-style', current.fontStyle);
      }
      if (current.fontWeight !== SVG_DEFAULTS.fontWeight) {
        current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight);
      }
      if (current.fillColor !== SVG_DEFAULTS.fillColor) {
        current.tspan.setAttributeNS(null, 'fill', current.fillColor);
      }

      current.txtElement.setAttributeNS(null, 'transform',
                                        pm(current.textMatrix) +
                                        ' scale(1, -1)' );
      current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve');
      current.txtElement.appendChild(current.tspan);
      current.txtgrp.appendChild(current.txtElement);

      this.tgrp.appendChild(current.txtElement);

    },

    setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) {
      this.setLeading(-y);
      this.moveText(x, y);
    },

    addFontStyle: function SVGGraphics_addFontStyle(fontObj) {
      if (!this.cssStyle) {
        this.cssStyle = document.createElementNS(NS, 'svg:style');
        this.cssStyle.setAttributeNS(null, 'type', 'text/css');
        this.defs.appendChild(this.cssStyle);
      }

      var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype);
      this.cssStyle.textContent +=
        '@font-face { font-family: "' + fontObj.loadedName + '";' +
        ' src: url(' + url + '); }\n';
    },

    setFont: function SVGGraphics_setFont(details) {
      var current = this.current;
      var fontObj = this.commonObjs.get(details[0]);
      var size = details[1];
      this.current.font = fontObj;

      if (this.embedFonts && fontObj.data &&
          !this.embeddedFonts[fontObj.loadedName]) {
        this.addFontStyle(fontObj);
        this.embeddedFonts[fontObj.loadedName] = fontObj;
      }

      current.fontMatrix = (fontObj.fontMatrix ?
                            fontObj.fontMatrix : FONT_IDENTITY_MATRIX);

      var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
                                 (fontObj.bold ? 'bold' : 'normal');
      var italic = fontObj.italic ? 'italic' : 'normal';

      if (size < 0) {
        size = -size;
        current.fontDirection = -1;
      } else {
        current.fontDirection = 1;
      }
      current.fontSize = size;
      current.fontFamily = fontObj.loadedName;
      current.fontWeight = bold;
      current.fontStyle = italic;

      current.tspan = document.createElementNS(NS, 'svg:tspan');
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));
      current.xcoords = [];
    },

    endText: function SVGGraphics_endText() {
      if (this.current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

    // Path properties
    setLineWidth: function SVGGraphics_setLineWidth(width) {
      this.current.lineWidth = width;
    },
    setLineCap: function SVGGraphics_setLineCap(style) {
      this.current.lineCap = LINE_CAP_STYLES[style];
    },
    setLineJoin: function SVGGraphics_setLineJoin(style) {
      this.current.lineJoin = LINE_JOIN_STYLES[style];
    },
    setMiterLimit: function SVGGraphics_setMiterLimit(limit) {
      this.current.miterLimit = limit;
    },
    setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.current.strokeColor = color;
    },
    setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.current.fillColor = color;
      this.current.tspan = document.createElementNS(NS, 'svg:tspan');
      this.current.xcoords = [];
    },
    setDash: function SVGGraphics_setDash(dashArray, dashPhase) {
      this.current.dashArray = dashArray;
      this.current.dashPhase = dashPhase;
    },

    constructPath: function SVGGraphics_constructPath(ops, args) {
      var current = this.current;
      var x = current.x, y = current.y;
      current.path = document.createElementNS(NS, 'svg:path');
      var d = [];
      var opLength = ops.length;

      for (var i = 0, j = 0; i < opLength; i++) {
        switch (ops[i] | 0) {
          case OPS.rectangle:
            x = args[j++];
            y = args[j++];
            var width = args[j++];
            var height = args[j++];
            var xw = x + width;
            var yh = y + height;
            d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh),
                   'L', pf(x), pf(yh), 'Z');
            break;
          case OPS.moveTo:
            x = args[j++];
            y = args[j++];
            d.push('M', pf(x), pf(y));
            break;
          case OPS.lineTo:
            x = args[j++];
            y = args[j++];
            d.push('L', pf(x) , pf(y));
            break;
          case OPS.curveTo:
            x = args[j + 4];
            y = args[j + 5];
            d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]),
                   pf(args[j + 3]), pf(x), pf(y));
            j += 6;
            break;
          case OPS.curveTo2:
            x = args[j + 2];
            y = args[j + 3];
            d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]),
                   pf(args[j + 2]), pf(args[j + 3]));
            j += 4;
            break;
          case OPS.curveTo3:
            x = args[j + 2];
            y = args[j + 3];
            d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y),
                   pf(x), pf(y));
            j += 4;
            break;
          case OPS.closePath:
            d.push('Z');
            break;
        }
      }
      current.path.setAttributeNS(null, 'd', d.join(' '));
      current.path.setAttributeNS(null, 'stroke-miterlimit',
                                  pf(current.miterLimit));
      current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap);
      current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin);
      current.path.setAttributeNS(null, 'stroke-width',
                                  pf(current.lineWidth) + 'px');
      current.path.setAttributeNS(null, 'stroke-dasharray',
                                  current.dashArray.map(pf).join(' '));
      current.path.setAttributeNS(null, 'stroke-dashoffset',
                                  pf(current.dashPhase) + 'px');
      current.path.setAttributeNS(null, 'fill', 'none');

      this.tgrp.appendChild(current.path);
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      // Saving a reference in current.element so that it can be addressed
      // in 'fill' and 'stroke'
      current.element = current.path;
      current.setCurrentPoint(x, y);
    },

    endPath: function SVGGraphics_endPath() {
      var current = this.current;
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

    clip: function SVGGraphics_clip(type) {
      var current = this.current;
      // Add current path to clipping path
      current.clipId = 'clippath' + clipCount;
      clipCount++;
      this.clippath = document.createElementNS(NS, 'svg:clipPath');
      this.clippath.setAttributeNS(null, 'id', current.clipId);
      var clipElement = current.element.cloneNode();
      if (type === 'evenodd') {
        clipElement.setAttributeNS(null, 'clip-rule', 'evenodd');
      } else {
        clipElement.setAttributeNS(null, 'clip-rule', 'nonzero');
      }
      this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix));
      this.clippath.appendChild(clipElement);
      this.defs.appendChild(this.clippath);

      // Create a new group with that attribute
      current.pendingClip = true;
      this.cgrp = document.createElementNS(NS, 'svg:g');
      this.cgrp.setAttributeNS(null, 'clip-path',
                               'url(#' + current.clipId + ')');
      this.pgrp.appendChild(this.cgrp);
    },

    closePath: function SVGGraphics_closePath() {
      var current = this.current;
      var d = current.path.getAttributeNS(null, 'd');
      d += 'Z';
      current.path.setAttributeNS(null, 'd', d);
    },

    setLeading: function SVGGraphics_setLeading(leading) {
      this.current.leading = -leading;
    },

    setTextRise: function SVGGraphics_setTextRise(textRise) {
      this.current.textRise = textRise;
    },

    setHScale: function SVGGraphics_setHScale(scale) {
      this.current.textHScale = scale / 100;
    },

    setGState: function SVGGraphics_setGState(states) {
      for (var i = 0, ii = states.length; i < ii; i++) {
        var state = states[i];
        var key = state[0];
        var value = state[1];

        switch (key) {
          case 'LW':
            this.setLineWidth(value);
            break;
          case 'LC':
            this.setLineCap(value);
            break;
          case 'LJ':
            this.setLineJoin(value);
            break;
          case 'ML':
            this.setMiterLimit(value);
            break;
          case 'D':
            this.setDash(value[0], value[1]);
            break;
          case 'RI':
            break;
          case 'FL':
            break;
          case 'Font':
            this.setFont(value);
            break;
          case 'CA':
            break;
          case 'ca':
            break;
          case 'BM':
            break;
          case 'SMask':
            break;
        }
      }
    },

    fill: function SVGGraphics_fill() {
      var current = this.current;
      current.element.setAttributeNS(null, 'fill', current.fillColor);
    },

    stroke: function SVGGraphics_stroke() {
      var current = this.current;
      current.element.setAttributeNS(null, 'stroke', current.strokeColor);
      current.element.setAttributeNS(null, 'fill', 'none');
    },

    eoFill: function SVGGraphics_eoFill() {
      var current = this.current;
      current.element.setAttributeNS(null, 'fill', current.fillColor);
      current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
    },

    fillStroke: function SVGGraphics_fillStroke() {
      // Order is important since stroke wants fill to be none.
      // First stroke, then if fill needed, it will be overwritten.
      this.stroke();
      this.fill();
    },

    eoFillStroke: function SVGGraphics_eoFillStroke() {
      this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
      this.fillStroke();
    },

    closeStroke: function SVGGraphics_closeStroke() {
      this.closePath();
      this.stroke();
    },

    closeFillStroke: function SVGGraphics_closeFillStroke() {
      this.closePath();
      this.fillStroke();
    },

    paintSolidColorImageMask:
        function SVGGraphics_paintSolidColorImageMask() {
      var current = this.current;
      var rect = document.createElementNS(NS, 'svg:rect');
      rect.setAttributeNS(null, 'x', '0');
      rect.setAttributeNS(null, 'y', '0');
      rect.setAttributeNS(null, 'width', '1px');
      rect.setAttributeNS(null, 'height', '1px');
      rect.setAttributeNS(null, 'fill', current.fillColor);
      this.tgrp.appendChild(rect);
    },

    paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) {
      var current = this.current;
      var imgObj = this.objs.get(objId);
      var imgEl = document.createElementNS(NS, 'svg:image');
      imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src);
      imgEl.setAttributeNS(null, 'width', imgObj.width + 'px');
      imgEl.setAttributeNS(null, 'height', imgObj.height + 'px');
      imgEl.setAttributeNS(null, 'x', '0');
      imgEl.setAttributeNS(null, 'y', pf(-h));
      imgEl.setAttributeNS(null, 'transform',
                           'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')');

      this.tgrp.appendChild(imgEl);
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
    },

    paintImageXObject: function SVGGraphics_paintImageXObject(objId) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }
      this.paintInlineImageXObject(imgData);
    },

    paintInlineImageXObject:
        function SVGGraphics_paintInlineImageXObject(imgData, mask) {
      var current = this.current;
      var width = imgData.width;
      var height = imgData.height;

      var imgSrc = convertImgDataToPng(imgData);
      var cliprect = document.createElementNS(NS, 'svg:rect');
      cliprect.setAttributeNS(null, 'x', '0');
      cliprect.setAttributeNS(null, 'y', '0');
      cliprect.setAttributeNS(null, 'width', pf(width));
      cliprect.setAttributeNS(null, 'height', pf(height));
      current.element = cliprect;
      this.clip('nonzero');
      var imgEl = document.createElementNS(NS, 'svg:image');
      imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc);
      imgEl.setAttributeNS(null, 'x', '0');
      imgEl.setAttributeNS(null, 'y', pf(-height));
      imgEl.setAttributeNS(null, 'width', pf(width) + 'px');
      imgEl.setAttributeNS(null, 'height', pf(height) + 'px');
      imgEl.setAttributeNS(null, 'transform',
                           'scale(' + pf(1 / width) + ' ' +
                           pf(-1 / height) + ')');
      if (mask) {
        mask.appendChild(imgEl);
      } else {
        this.tgrp.appendChild(imgEl);
      }
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
    },

    paintImageMaskXObject:
        function SVGGraphics_paintImageMaskXObject(imgData) {
      var current = this.current;
      var width = imgData.width;
      var height = imgData.height;
      var fillColor = current.fillColor;

      current.maskId = 'mask' + maskCount++;
      var mask = document.createElementNS(NS, 'svg:mask');
      mask.setAttributeNS(null, 'id', current.maskId);

      var rect = document.createElementNS(NS, 'svg:rect');
      rect.setAttributeNS(null, 'x', '0');
      rect.setAttributeNS(null, 'y', '0');
      rect.setAttributeNS(null, 'width', pf(width));
      rect.setAttributeNS(null, 'height', pf(height));
      rect.setAttributeNS(null, 'fill', fillColor);
      rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')');
      this.defs.appendChild(mask);
      this.tgrp.appendChild(rect);

      this.paintInlineImageXObject(imgData, mask);
    },

    paintFormXObjectBegin:
        function SVGGraphics_paintFormXObjectBegin(matrix, bbox) {
      this.save();

      if (isArray(matrix) && matrix.length === 6) {
        this.transform(matrix[0], matrix[1], matrix[2],
                       matrix[3], matrix[4], matrix[5]);
      }

      if (isArray(bbox) && bbox.length === 4) {
        var width = bbox[2] - bbox[0];
        var height = bbox[3] - bbox[1];

        var cliprect = document.createElementNS(NS, 'svg:rect');
        cliprect.setAttributeNS(null, 'x', bbox[0]);
        cliprect.setAttributeNS(null, 'y', bbox[1]);
        cliprect.setAttributeNS(null, 'width', pf(width));
        cliprect.setAttributeNS(null, 'height', pf(height));
        this.current.element = cliprect;
        this.clip('nonzero');
        this.endPath();
      }
    },

    paintFormXObjectEnd:
        function SVGGraphics_paintFormXObjectEnd() {
      this.restore();
    }
  };
  return SVGGraphics;
})();

PDFJS.SVGGraphics = SVGGraphics;


}).call((typeof window === 'undefined') ? this : window);

if (!PDFJS.workerSrc && typeof document !== 'undefined') {
  // workerSrc is not set -- using last script url to define default location
  PDFJS.workerSrc = (function () {
    'use strict';
    var scriptTagContainer = document.body ||
                             document.getElementsByTagName('head')[0];
    var pdfjsSrc = scriptTagContainer.lastChild.src;
    return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
  })();
}


/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* globals PDFJS */

'use strict';

var FontInspector = (function FontInspectorClosure() {
  var fonts;
  var active = false;
  var fontAttribute = 'data-font-name';
  function removeSelection() {
    var divs = document.querySelectorAll('div[' + fontAttribute + ']');
    for (var i = 0, ii = divs.length; i < ii; ++i) {
      var div = divs[i];
      div.className = '';
    }
  }
  function resetSelection() {
    var divs = document.querySelectorAll('div[' + fontAttribute + ']');
    for (var i = 0, ii = divs.length; i < ii; ++i) {
      var div = divs[i];
      div.className = 'debuggerHideText';
    }
  }
  function selectFont(fontName, show) {
    var divs = document.querySelectorAll('div[' + fontAttribute + '=' +
                                         fontName + ']');
    for (var i = 0, ii = divs.length; i < ii; ++i) {
      var div = divs[i];
      div.className = show ? 'debuggerShowText' : 'debuggerHideText';
    }
  }
  function textLayerClick(e) {
    if (!e.target.dataset.fontName ||
        e.target.tagName.toUpperCase() !== 'DIV') {
      return;
    }
    var fontName = e.target.dataset.fontName;
    var selects = document.getElementsByTagName('input');
    for (var i = 0; i < selects.length; ++i) {
      var select = selects[i];
      if (select.dataset.fontName !== fontName) {
        continue;
      }
      select.checked = !select.checked;
      selectFont(fontName, select.checked);
      select.scrollIntoView();
    }
  }
  return {
    // Properties/functions needed by PDFBug.
    id: 'FontInspector',
    name: 'Font Inspector',
    panel: null,
    manager: null,
    init: function init() {
      var panel = this.panel;
      panel.setAttribute('style', 'padding: 5px;');
      var tmp = document.createElement('button');
      tmp.addEventListener('click', resetSelection);
      tmp.textContent = 'Refresh';
      panel.appendChild(tmp);

      fonts = document.createElement('div');
      panel.appendChild(fonts);
    },
    cleanup: function cleanup() {
      fonts.textContent = '';
    },
    enabled: false,
    get active() {
      return active;
    },
    set active(value) {
      active = value;
      if (active) {
        document.body.addEventListener('click', textLayerClick, true);
        resetSelection();
      } else {
        document.body.removeEventListener('click', textLayerClick, true);
        removeSelection();
      }
    },
    // FontInspector specific functions.
    fontAdded: function fontAdded(fontObj, url) {
      function properties(obj, list) {
        var moreInfo = document.createElement('table');
        for (var i = 0; i < list.length; i++) {
          var tr = document.createElement('tr');
          var td1 = document.createElement('td');
          td1.textContent = list[i];
          tr.appendChild(td1);
          var td2 = document.createElement('td');
          td2.textContent = obj[list[i]].toString();
          tr.appendChild(td2);
          moreInfo.appendChild(tr);
        }
        return moreInfo;
      }
      var moreInfo = properties(fontObj, ['name', 'type']);
      var fontName = fontObj.loadedName;
      var font = document.createElement('div');
      var name = document.createElement('span');
      name.textContent = fontName;
      var download = document.createElement('a');
      if (url) {
        url = /url\(['"]?([^\)"']+)/.exec(url);
        download.href = url[1];
      } else if (fontObj.data) {
        url = URL.createObjectURL(new Blob([fontObj.data], {
          type: fontObj.mimeType
        }));
        download.href = url;
      }
      download.textContent = 'Download';
      var logIt = document.createElement('a');
      logIt.href = '';
      logIt.textContent = 'Log';
      logIt.addEventListener('click', function(event) {
        event.preventDefault();
        console.log(fontObj);
      });
      var select = document.createElement('input');
      select.setAttribute('type', 'checkbox');
      select.dataset.fontName = fontName;
      select.addEventListener('click', (function(select, fontName) {
        return (function() {
           selectFont(fontName, select.checked);
        });
      })(select, fontName));
      font.appendChild(select);
      font.appendChild(name);
      font.appendChild(document.createTextNode(' '));
      font.appendChild(download);
      font.appendChild(document.createTextNode(' '));
      font.appendChild(logIt);
      font.appendChild(moreInfo);
      fonts.appendChild(font);
      // Somewhat of a hack, should probably add a hook for when the text layer
      // is done rendering.
      setTimeout(function() {
        if (this.active) {
          resetSelection();
        }
      }.bind(this), 2000);
    }
  };
})();

// Manages all the page steppers.
var StepperManager = (function StepperManagerClosure() {
  var steppers = [];
  var stepperDiv = null;
  var stepperControls = null;
  var stepperChooser = null;
  var breakPoints = {};
  return {
    // Properties/functions needed by PDFBug.
    id: 'Stepper',
    name: 'Stepper',
    panel: null,
    manager: null,
    init: function init() {
      var self = this;
      this.panel.setAttribute('style', 'padding: 5px;');
      stepperControls = document.createElement('div');
      stepperChooser = document.createElement('select');
      stepperChooser.addEventListener('change', function(event) {
        self.selectStepper(this.value);
      });
      stepperControls.appendChild(stepperChooser);
      stepperDiv = document.createElement('div');
      this.panel.appendChild(stepperControls);
      this.panel.appendChild(stepperDiv);
      if (sessionStorage.getItem('pdfjsBreakPoints')) {
        breakPoints = JSON.parse(sessionStorage.getItem('pdfjsBreakPoints'));
      }
    },
    cleanup: function cleanup() {
      stepperChooser.textContent = '';
      stepperDiv.textContent = '';
      steppers = [];
    },
    enabled: false,
    active: false,
    // Stepper specific functions.
    create: function create(pageIndex) {
      var debug = document.createElement('div');
      debug.id = 'stepper' + pageIndex;
      debug.setAttribute('hidden', true);
      debug.className = 'stepper';
      stepperDiv.appendChild(debug);
      var b = document.createElement('option');
      b.textContent = 'Page ' + (pageIndex + 1);
      b.value = pageIndex;
      stepperChooser.appendChild(b);
      var initBreakPoints = breakPoints[pageIndex] || [];
      var stepper = new Stepper(debug, pageIndex, initBreakPoints);
      steppers.push(stepper);
      if (steppers.length === 1) {
        this.selectStepper(pageIndex, false);
      }
      return stepper;
    },
    selectStepper: function selectStepper(pageIndex, selectPanel) {
      var i;
      pageIndex = pageIndex | 0;
      if (selectPanel) {
        this.manager.selectPanel(this);
      }
      for (i = 0; i < steppers.length; ++i) {
        var stepper = steppers[i];
        if (stepper.pageIndex === pageIndex) {
          stepper.panel.removeAttribute('hidden');
        } else {
          stepper.panel.setAttribute('hidden', true);
        }
      }
      var options = stepperChooser.options;
      for (i = 0; i < options.length; ++i) {
        var option = options[i];
        option.selected = (option.value | 0) === pageIndex;
      }
    },
    saveBreakPoints: function saveBreakPoints(pageIndex, bps) {
      breakPoints[pageIndex] = bps;
      sessionStorage.setItem('pdfjsBreakPoints', JSON.stringify(breakPoints));
    }
  };
})();

// The stepper for each page's IRQueue.
var Stepper = (function StepperClosure() {
  // Shorter way to create element and optionally set textContent.
  function c(tag, textContent) {
    var d = document.createElement(tag);
    if (textContent) {
      d.textContent = textContent;
    }
    return d;
  }

  var opMap = null;

  function simplifyArgs(args) {
    if (typeof args === 'string') {
      var MAX_STRING_LENGTH = 75;
      return args.length <= MAX_STRING_LENGTH ? args :
        args.substr(0, MAX_STRING_LENGTH) + '...';
    }
    if (typeof args !== 'object' || args === null) {
      return args;
    }
    if ('length' in args) { // array
      var simpleArgs = [], i, ii;
      var MAX_ITEMS = 10;
      for (i = 0, ii = Math.min(MAX_ITEMS, args.length); i < ii; i++) {
        simpleArgs.push(simplifyArgs(args[i]));
      }
      if (i < args.length) {
        simpleArgs.push('...');
      }
      return simpleArgs;
    }
    var simpleObj = {};
    for (var key in args) {
      simpleObj[key] = simplifyArgs(args[key]);
    }
    return simpleObj;
  }

  function Stepper(panel, pageIndex, initialBreakPoints) {
    this.panel = panel;
    this.breakPoint = 0;
    this.nextBreakPoint = null;
    this.pageIndex = pageIndex;
    this.breakPoints = initialBreakPoints;
    this.currentIdx = -1;
    this.operatorListIdx = 0;
  }
  Stepper.prototype = {
    init: function init() {
      var panel = this.panel;
      var content = c('div', 'c=continue, s=step');
      var table = c('table');
      content.appendChild(table);
      table.cellSpacing = 0;
      var headerRow = c('tr');
      table.appendChild(headerRow);
      headerRow.appendChild(c('th', 'Break'));
      headerRow.appendChild(c('th', 'Idx'));
      headerRow.appendChild(c('th', 'fn'));
      headerRow.appendChild(c('th', 'args'));
      panel.appendChild(content);
      this.table = table;
      if (!opMap) {
        opMap = Object.create(null);
        for (var key in PDFJS.OPS) {
          opMap[PDFJS.OPS[key]] = key;
        }
      }
    },
    updateOperatorList: function updateOperatorList(operatorList) {
      var self = this;

      function cboxOnClick() {
        var x = +this.dataset.idx;
        if (this.checked) {
          self.breakPoints.push(x);
        } else {
          self.breakPoints.splice(self.breakPoints.indexOf(x), 1);
        }
        StepperManager.saveBreakPoints(self.pageIndex, self.breakPoints);
      }

      var MAX_OPERATORS_COUNT = 15000;
      if (this.operatorListIdx > MAX_OPERATORS_COUNT) {
        return;
      }

      var chunk = document.createDocumentFragment();
      var operatorsToDisplay = Math.min(MAX_OPERATORS_COUNT,
                                        operatorList.fnArray.length);
      for (var i = this.operatorListIdx; i < operatorsToDisplay; i++) {
        var line = c('tr');
        line.className = 'line';
        line.dataset.idx = i;
        chunk.appendChild(line);
        var checked = this.breakPoints.indexOf(i) !== -1;
        var args = operatorList.argsArray[i] || [];

        var breakCell = c('td');
        var cbox = c('input');
        cbox.type = 'checkbox';
        cbox.className = 'points';
        cbox.checked = checked;
        cbox.dataset.idx = i;
        cbox.onclick = cboxOnClick;

        breakCell.appendChild(cbox);
        line.appendChild(breakCell);
        line.appendChild(c('td', i.toString()));
        var fn = opMap[operatorList.fnArray[i]];
        var decArgs = args;
        if (fn === 'showText') {
          var glyphs = args[0];
          var newArgs = [];
          var str = [];
          for (var j = 0; j < glyphs.length; j++) {
            var glyph = glyphs[j];
            if (typeof glyph === 'object' && glyph !== null) {
              str.push(glyph.fontChar);
            } else {
              if (str.length > 0) {
                newArgs.push(str.join(''));
                str = [];
              }
              newArgs.push(glyph); // null or number
            }
          }
          if (str.length > 0) {
            newArgs.push(str.join(''));
          }
          decArgs = [newArgs];
        }
        line.appendChild(c('td', fn));
        line.appendChild(c('td', JSON.stringify(simplifyArgs(decArgs))));
      }
      if (operatorsToDisplay < operatorList.fnArray.length) {
        line = c('tr');
        var lastCell = c('td', '...');
        lastCell.colspan = 4;
        chunk.appendChild(lastCell);
      }
      this.operatorListIdx = operatorList.fnArray.length;
      this.table.appendChild(chunk);
    },
    getNextBreakPoint: function getNextBreakPoint() {
      this.breakPoints.sort(function(a, b) { return a - b; });
      for (var i = 0; i < this.breakPoints.length; i++) {
        if (this.breakPoints[i] > this.currentIdx) {
          return this.breakPoints[i];
        }
      }
      return null;
    },
    breakIt: function breakIt(idx, callback) {
      StepperManager.selectStepper(this.pageIndex, true);
      var self = this;
      var dom = document;
      self.currentIdx = idx;
      var listener = function(e) {
        switch (e.keyCode) {
          case 83: // step
            dom.removeEventListener('keydown', listener, false);
            self.nextBreakPoint = self.currentIdx + 1;
            self.goTo(-1);
            callback();
            break;
          case 67: // continue
            dom.removeEventListener('keydown', listener, false);
            var breakPoint = self.getNextBreakPoint();
            self.nextBreakPoint = breakPoint;
            self.goTo(-1);
            callback();
            break;
        }
      };
      dom.addEventListener('keydown', listener, false);
      self.goTo(idx);
    },
    goTo: function goTo(idx) {
      var allRows = this.panel.getElementsByClassName('line');
      for (var x = 0, xx = allRows.length; x < xx; ++x) {
        var row = allRows[x];
        if ((row.dataset.idx | 0) === idx) {
          row.style.backgroundColor = 'rgb(251,250,207)';
          row.scrollIntoView();
        } else {
          row.style.backgroundColor = null;
        }
      }
    }
  };
  return Stepper;
})();

var Stats = (function Stats() {
  var stats = [];
  function clear(node) {
    while (node.hasChildNodes()) {
      node.removeChild(node.lastChild);
    }
  }
  function getStatIndex(pageNumber) {
    for (var i = 0, ii = stats.length; i < ii; ++i) {
      if (stats[i].pageNumber === pageNumber) {
        return i;
      }
    }
    return false;
  }
  return {
    // Properties/functions needed by PDFBug.
    id: 'Stats',
    name: 'Stats',
    panel: null,
    manager: null,
    init: function init() {
      this.panel.setAttribute('style', 'padding: 5px;');
      PDFJS.enableStats = true;
    },
    enabled: false,
    active: false,
    // Stats specific functions.
    add: function(pageNumber, stat) {
      if (!stat) {
        return;
      }
      var statsIndex = getStatIndex(pageNumber);
      if (statsIndex !== false) {
        var b = stats[statsIndex];
        this.panel.removeChild(b.div);
        stats.splice(statsIndex, 1);
      }
      var wrapper = document.createElement('div');
      wrapper.className = 'stats';
      var title = document.createElement('div');
      title.className = 'title';
      title.textContent = 'Page: ' + pageNumber;
      var statsDiv = document.createElement('div');
      statsDiv.textContent = stat.toString();
      wrapper.appendChild(title);
      wrapper.appendChild(statsDiv);
      stats.push({ pageNumber: pageNumber, div: wrapper });
      stats.sort(function(a, b) { return a.pageNumber - b.pageNumber; });
      clear(this.panel);
      for (var i = 0, ii = stats.length; i < ii; ++i) {
        this.panel.appendChild(stats[i].div);
      }
    },
    cleanup: function () {
      stats = [];
      clear(this.panel);
    }
  };
})();

// Manages all the debugging tools.
var PDFBug = (function PDFBugClosure() {
  var panelWidth = 300;
  var buttons = [];
  var activePanel = null;

  return {
    tools: [
      FontInspector,
      StepperManager,
      Stats
    ],
    enable: function(ids) {
      var all = false, tools = this.tools;
      if (ids.length === 1 && ids[0] === 'all') {
        all = true;
      }
      for (var i = 0; i < tools.length; ++i) {
        var tool = tools[i];
        if (all || ids.indexOf(tool.id) !== -1) {
          tool.enabled = true;
        }
      }
      if (!all) {
        // Sort the tools by the order they are enabled.
        tools.sort(function(a, b) {
          var indexA = ids.indexOf(a.id);
          indexA = indexA < 0 ? tools.length : indexA;
          var indexB = ids.indexOf(b.id);
          indexB = indexB < 0 ? tools.length : indexB;
          return indexA - indexB;
        });
      }
    },
    init: function init() {
      /*
       * Basic Layout:
       * PDFBug
       *  Controls
       *  Panels
       *    Panel
       *    Panel
       *    ...
       */
      var ui = document.createElement('div');
      ui.id = 'PDFBug';

      var controls = document.createElement('div');
      controls.setAttribute('class', 'controls');
      ui.appendChild(controls);

      var panels = document.createElement('div');
      panels.setAttribute('class', 'panels');
      ui.appendChild(panels);

      var container = document.getElementById('viewerContainer');
      container.appendChild(ui);
      container.style.right = panelWidth + 'px';

      // Initialize all the debugging tools.
      var tools = this.tools;
      var self = this;
      for (var i = 0; i < tools.length; ++i) {
        var tool = tools[i];
        var panel = document.createElement('div');
        var panelButton = document.createElement('button');
        panelButton.textContent = tool.name;
        panelButton.addEventListener('click', (function(selected) {
          return function(event) {
            event.preventDefault();
            self.selectPanel(selected);
          };
        })(i));
        controls.appendChild(panelButton);
        panels.appendChild(panel);
        tool.panel = panel;
        tool.manager = this;
        if (tool.enabled) {
          tool.init();
        } else {
          panel.textContent = tool.name + ' is disabled. To enable add ' +
                              ' "' + tool.id + '" to the pdfBug parameter ' +
                              'and refresh (seperate multiple by commas).';
        }
        buttons.push(panelButton);
      }
      this.selectPanel(0);
    },
    cleanup: function cleanup() {
      for (var i = 0, ii = this.tools.length; i < ii; i++) {
        if (this.tools[i].enabled) {
          this.tools[i].cleanup();
        }
      }
    },
    selectPanel: function selectPanel(index) {
      if (typeof index !== 'number') {
        index = this.tools.indexOf(index);
      }
      if (index === activePanel) {
        return;
      }
      activePanel = index;
      var tools = this.tools;
      for (var j = 0; j < tools.length; ++j) {
        if (j === index) {
          buttons[j].setAttribute('class', 'active');
          tools[j].active = true;
          tools[j].panel.removeAttribute('hidden');
        } else {
          buttons[j].setAttribute('class', '');
          tools[j].active = false;
          tools[j].panel.setAttribute('hidden', 'true');
        }
      }
    }
  };
})();
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* globals VBArray, PDFJS */

'use strict';

// Initializing PDFJS global object here, it case if we need to change/disable
// some PDF.js features, e.g. range requests
if (typeof PDFJS === 'undefined') {
  (typeof window !== 'undefined' ? window : this).PDFJS = {};
}

// Checking if the typed arrays are supported
// Support: iOS<6.0 (subarray), IE<10, Android<4.0
(function checkTypedArrayCompatibility() {
  if (typeof Uint8Array !== 'undefined') {
    // Support: iOS<6.0
    if (typeof Uint8Array.prototype.subarray === 'undefined') {
        Uint8Array.prototype.subarray = function subarray(start, end) {
          return new Uint8Array(this.slice(start, end));
        };
        Float32Array.prototype.subarray = function subarray(start, end) {
          return new Float32Array(this.slice(start, end));
        };
    }

    // Support: Android<4.1
    if (typeof Float64Array === 'undefined') {
      window.Float64Array = Float32Array;
    }
    return;
  }

  function subarray(start, end) {
    return new TypedArray(this.slice(start, end));
  }

  function setArrayOffset(array, offset) {
    if (arguments.length < 2) {
      offset = 0;
    }
    for (var i = 0, n = array.length; i < n; ++i, ++offset) {
      this[offset] = array[i] & 0xFF;
    }
  }

  function TypedArray(arg1) {
    var result, i, n;
    if (typeof arg1 === 'number') {
      result = [];
      for (i = 0; i < arg1; ++i) {
        result[i] = 0;
      }
    } else if ('slice' in arg1) {
      result = arg1.slice(0);
    } else {
      result = [];
      for (i = 0, n = arg1.length; i < n; ++i) {
        result[i] = arg1[i];
      }
    }

    result.subarray = subarray;
    result.buffer = result;
    result.byteLength = result.length;
    result.set = setArrayOffset;

    if (typeof arg1 === 'object' && arg1.buffer) {
      result.buffer = arg1.buffer;
    }
    return result;
  }

  window.Uint8Array = TypedArray;
  window.Int8Array = TypedArray;

  // we don't need support for set, byteLength for 32-bit array
  // so we can use the TypedArray as well
  window.Uint32Array = TypedArray;
  window.Int32Array = TypedArray;
  window.Uint16Array = TypedArray;
  window.Float32Array = TypedArray;
  window.Float64Array = TypedArray;
})();

// URL = URL || webkitURL
// Support: Safari<7, Android 4.2+
(function normalizeURLObject() {
  if (!window.URL) {
    window.URL = window.webkitURL;
  }
})();

// Object.defineProperty()?
// Support: Android<4.0, Safari<5.1
(function checkObjectDefinePropertyCompatibility() {
  if (typeof Object.defineProperty !== 'undefined') {
    var definePropertyPossible = true;
    try {
      // some browsers (e.g. safari) cannot use defineProperty() on DOM objects
      // and thus the native version is not sufficient
      Object.defineProperty(new Image(), 'id', { value: 'test' });
      // ... another test for android gb browser for non-DOM objects
      var Test = function Test() {};
      Test.prototype = { get id() { } };
      Object.defineProperty(new Test(), 'id',
        { value: '', configurable: true, enumerable: true, writable: false });
    } catch (e) {
      definePropertyPossible = false;
    }
    if (definePropertyPossible) {
      return;
    }
  }

  Object.defineProperty = function objectDefineProperty(obj, name, def) {
    delete obj[name];
    if ('get' in def) {
      obj.__defineGetter__(name, def['get']);
    }
    if ('set' in def) {
      obj.__defineSetter__(name, def['set']);
    }
    if ('value' in def) {
      obj.__defineSetter__(name, function objectDefinePropertySetter(value) {
        this.__defineGetter__(name, function objectDefinePropertyGetter() {
          return value;
        });
        return value;
      });
      obj[name] = def.value;
    }
  };
})();


// No XMLHttpRequest#response?
// Support: IE<11, Android <4.0
(function checkXMLHttpRequestResponseCompatibility() {
  var xhrPrototype = XMLHttpRequest.prototype;
  var xhr = new XMLHttpRequest();
  if (!('overrideMimeType' in xhr)) {
    // IE10 might have response, but not overrideMimeType
    // Support: IE10
    Object.defineProperty(xhrPrototype, 'overrideMimeType', {
      value: function xmlHttpRequestOverrideMimeType(mimeType) {}
    });
  }
  if ('responseType' in xhr) {
    return;
  }

  // The worker will be using XHR, so we can save time and disable worker.
  PDFJS.disableWorker = true;

  Object.defineProperty(xhrPrototype, 'responseType', {
    get: function xmlHttpRequestGetResponseType() {
      return this._responseType || 'text';
    },
    set: function xmlHttpRequestSetResponseType(value) {
      if (value === 'text' || value === 'arraybuffer') {
        this._responseType = value;
        if (value === 'arraybuffer' &&
            typeof this.overrideMimeType === 'function') {
          this.overrideMimeType('text/plain; charset=x-user-defined');
        }
      }
    }
  });

  // Support: IE9
  if (typeof VBArray !== 'undefined') {
    Object.defineProperty(xhrPrototype, 'response', {
      get: function xmlHttpRequestResponseGet() {
        if (this.responseType === 'arraybuffer') {
          return new Uint8Array(new VBArray(this.responseBody).toArray());
        } else {
          return this.responseText;
        }
      }
    });
    return;
  }

  Object.defineProperty(xhrPrototype, 'response', {
    get: function xmlHttpRequestResponseGet() {
      if (this.responseType !== 'arraybuffer') {
        return this.responseText;
      }
      var text = this.responseText;
      var i, n = text.length;
      var result = new Uint8Array(n);
      for (i = 0; i < n; ++i) {
        result[i] = text.charCodeAt(i) & 0xFF;
      }
      return result.buffer;
    }
  });
})();

// window.btoa (base64 encode function) ?
// Support: IE<10
(function checkWindowBtoaCompatibility() {
  if ('btoa' in window) {
    return;
  }

  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

  window.btoa = function windowBtoa(chars) {
    var buffer = '';
    var i, n;
    for (i = 0, n = chars.length; i < n; i += 3) {
      var b1 = chars.charCodeAt(i) & 0xFF;
      var b2 = chars.charCodeAt(i + 1) & 0xFF;
      var b3 = chars.charCodeAt(i + 2) & 0xFF;
      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
      var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
      var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
      buffer += (digits.charAt(d1) + digits.charAt(d2) +
                 digits.charAt(d3) + digits.charAt(d4));
    }
    return buffer;
  };
})();

// window.atob (base64 encode function)?
// Support: IE<10
(function checkWindowAtobCompatibility() {
  if ('atob' in window) {
    return;
  }

  // https://github.com/davidchambers/Base64.js
  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
  window.atob = function (input) {
    input = input.replace(/=+$/, '');
    if (input.length % 4 === 1) {
      throw new Error('bad atob input');
    }
    for (
      // initialize result and counters
      var bc = 0, bs, buffer, idx = 0, output = '';
      // get next character
      buffer = input.charAt(idx++);
      // character found in table?
      // initialize bit storage and add its ascii value
      ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
        // and if not first of each 4 characters,
        // convert the first 8 bits to one ascii character
        bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0
    ) {
      // try to find character in table (0-63, not found => -1)
      buffer = digits.indexOf(buffer);
    }
    return output;
  };
})();

// Function.prototype.bind?
// Support: Android<4.0, iOS<6.0
(function checkFunctionPrototypeBindCompatibility() {
  if (typeof Function.prototype.bind !== 'undefined') {
    return;
  }

  Function.prototype.bind = function functionPrototypeBind(obj) {
    var fn = this, headArgs = Array.prototype.slice.call(arguments, 1);
    var bound = function functionPrototypeBindBound() {
      var args = headArgs.concat(Array.prototype.slice.call(arguments));
      return fn.apply(obj, args);
    };
    return bound;
  };
})();

// HTMLElement dataset property
// Support: IE<11, Safari<5.1, Android<4.0
(function checkDatasetProperty() {
  var div = document.createElement('div');
  if ('dataset' in div) {
    return; // dataset property exists
  }

  Object.defineProperty(HTMLElement.prototype, 'dataset', {
    get: function() {
      if (this._dataset) {
        return this._dataset;
      }

      var dataset = {};
      for (var j = 0, jj = this.attributes.length; j < jj; j++) {
        var attribute = this.attributes[j];
        if (attribute.name.substring(0, 5) !== 'data-') {
          continue;
        }
        var key = attribute.name.substring(5).replace(/\-([a-z])/g,
          function(all, ch) {
            return ch.toUpperCase();
          });
        dataset[key] = attribute.value;
      }

      Object.defineProperty(this, '_dataset', {
        value: dataset,
        writable: false,
        enumerable: false
      });
      return dataset;
    },
    enumerable: true
  });
})();

// HTMLElement classList property
// Support: IE<10, Android<4.0, iOS<5.0
(function checkClassListProperty() {
  var div = document.createElement('div');
  if ('classList' in div) {
    return; // classList property exists
  }

  function changeList(element, itemName, add, remove) {
    var s = element.className || '';
    var list = s.split(/\s+/g);
    if (list[0] === '') {
      list.shift();
    }
    var index = list.indexOf(itemName);
    if (index < 0 && add) {
      list.push(itemName);
    }
    if (index >= 0 && remove) {
      list.splice(index, 1);
    }
    element.className = list.join(' ');
    return (index >= 0);
  }

  var classListPrototype = {
    add: function(name) {
      changeList(this.element, name, true, false);
    },
    contains: function(name) {
      return changeList(this.element, name, false, false);
    },
    remove: function(name) {
      changeList(this.element, name, false, true);
    },
    toggle: function(name) {
      changeList(this.element, name, true, true);
    }
  };

  Object.defineProperty(HTMLElement.prototype, 'classList', {
    get: function() {
      if (this._classList) {
        return this._classList;
      }

      var classList = Object.create(classListPrototype, {
        element: {
          value: this,
          writable: false,
          enumerable: true
        }
      });
      Object.defineProperty(this, '_classList', {
        value: classList,
        writable: false,
        enumerable: false
      });
      return classList;
    },
    enumerable: true
  });
})();

// Check console compatibility
// In older IE versions the console object is not available
// unless console is open.
// Support: IE<10
(function checkConsoleCompatibility() {
  if (!('console' in window)) {
    window.console = {
      log: function() {},
      error: function() {},
      warn: function() {}
    };
  } else if (!('bind' in console.log)) {
    // native functions in IE9 might not have bind
    console.log = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.log);
    console.error = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.error);
    console.warn = (function(fn) {
      return function(msg) { return fn(msg); };
    })(console.warn);
  }
})();

// Check onclick compatibility in Opera
// Support: Opera<15
(function checkOnClickCompatibility() {
  // workaround for reported Opera bug DSK-354448:
  // onclick fires on disabled buttons with opaque content
  function ignoreIfTargetDisabled(event) {
    if (isDisabled(event.target)) {
      event.stopPropagation();
    }
  }
  function isDisabled(node) {
    return node.disabled || (node.parentNode && isDisabled(node.parentNode));
  }
  if (navigator.userAgent.indexOf('Opera') !== -1) {
    // use browser detection since we cannot feature-check this bug
    document.addEventListener('click', ignoreIfTargetDisabled, true);
  }
})();

// Checks if possible to use URL.createObjectURL()
// Support: IE
(function checkOnBlobSupport() {
  // sometimes IE loosing the data created with createObjectURL(), see #3977
  if (navigator.userAgent.indexOf('Trident') >= 0) {
    PDFJS.disableCreateObjectURL = true;
  }
})();

// Checks if navigator.language is supported
(function checkNavigatorLanguage() {
  if ('language' in navigator) {
    return;
  }
  PDFJS.locale = navigator.userLanguage || 'en-US';
})();

(function checkRangeRequests() {
  // Safari has issues with cached range requests see:
  // https://github.com/mozilla/pdf.js/issues/3260
  // Last tested with version 6.0.4.
  // Support: Safari 6.0+
  var isSafari = Object.prototype.toString.call(
                  window.HTMLElement).indexOf('Constructor') > 0;

  // Older versions of Android (pre 3.0) has issues with range requests, see:
  // https://github.com/mozilla/pdf.js/issues/3381.
  // Make sure that we only match webkit-based Android browsers,
  // since Firefox/Fennec works as expected.
  // Support: Android<3.0
  var regex = /Android\s[0-2][^\d]/;
  var isOldAndroid = regex.test(navigator.userAgent);

  // Range requests are broken in Chrome 39 and 40, https://crbug.com/442318
  var isChromeWithRangeBug = /Chrome\/(39|40)\./.test(navigator.userAgent);

  if (isSafari || isOldAndroid || isChromeWithRangeBug) {
    PDFJS.disableRange = true;
    PDFJS.disableStream = true;
  }
})();

// Check if the browser supports manipulation of the history.
// Support: IE<10, Android<4.2
(function checkHistoryManipulation() {
  // Android 2.x has so buggy pushState support that it was removed in
  // Android 3.0 and restored as late as in Android 4.2.
  // Support: Android 2.x
  if (!history.pushState || navigator.userAgent.indexOf('Android 2.') >= 0) {
    PDFJS.disableHistory = true;
  }
})();

// Support: IE<11, Chrome<21, Android<4.4, Safari<6
(function checkSetPresenceInImageData() {
  // IE < 11 will use window.CanvasPixelArray which lacks set function.
  if (window.CanvasPixelArray) {
    if (typeof window.CanvasPixelArray.prototype.set !== 'function') {
      window.CanvasPixelArray.prototype.set = function(arr) {
        for (var i = 0, ii = this.length; i < ii; i++) {
          this[i] = arr[i];
        }
      };
    }
  } else {
    // Old Chrome and Android use an inaccessible CanvasPixelArray prototype.
    // Because we cannot feature detect it, we rely on user agent parsing.
    var polyfill = false, versionMatch;
    if (navigator.userAgent.indexOf('Chrom') >= 0) {
      versionMatch = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
      // Chrome < 21 lacks the set function.
      polyfill = versionMatch && parseInt(versionMatch[2]) < 21;
    } else if (navigator.userAgent.indexOf('Android') >= 0) {
      // Android < 4.4 lacks the set function.
      // Android >= 4.4 will contain Chrome in the user agent,
      // thus pass the Chrome check above and not reach this block.
      polyfill = /Android\s[0-4][^\d]/g.test(navigator.userAgent);
    } else if (navigator.userAgent.indexOf('Safari') >= 0) {
      versionMatch = navigator.userAgent.
        match(/Version\/([0-9]+)\.([0-9]+)\.([0-9]+) Safari\//);
      // Safari < 6 lacks the set function.
      polyfill = versionMatch && parseInt(versionMatch[1]) < 6;
    }

    if (polyfill) {
      var contextPrototype = window.CanvasRenderingContext2D.prototype;
      contextPrototype._createImageData = contextPrototype.createImageData;
      contextPrototype.createImageData = function(w, h) {
        var imageData = this._createImageData(w, h);
        imageData.data.set = function(arr) {
          for (var i = 0, ii = this.length; i < ii; i++) {
            this[i] = arr[i];
          }
        };
        return imageData;
      };
    }
  }
})();

// Support: IE<10, Android<4.0, iOS
(function checkRequestAnimationFrame() {
  function fakeRequestAnimationFrame(callback) {
    window.setTimeout(callback, 20);
  }

  var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
  if (isIOS) {
    // requestAnimationFrame on iOS is broken, replacing with fake one.
    window.requestAnimationFrame = fakeRequestAnimationFrame;
    return;
  }
  if ('requestAnimationFrame' in window) {
    return;
  }
  window.requestAnimationFrame =
    window.mozRequestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    fakeRequestAnimationFrame;
})();

(function checkCanvasSizeLimitation() {
  var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
  var isAndroid = /Android/g.test(navigator.userAgent);
  if (isIOS || isAndroid) {
    // 5MP
    PDFJS.maxCanvasPixels = 5242880;
  }
})();

// Disable fullscreen support for certain problematic configurations.
// Support: IE11+ (when embedded).
(function checkFullscreenSupport() {
  var isEmbeddedIE = (navigator.userAgent.indexOf('Trident') >= 0 &&
                      window.parent !== window);
  if (isEmbeddedIE) {
    PDFJS.disableFullscreen = true;
  }
})();
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* globals PDFJS, PDFBug, FirefoxCom, Stats, Cache, ProgressBar,
           DownloadManager, getFileName, getPDFFileNameFromURL,
           PDFHistory, Preferences, SidebarView, ViewHistory, Stats,
           PDFThumbnailViewer, URL, noContextMenuHandler, SecondaryToolbar,
           PasswordPrompt, PDFPresentationMode, PDFDocumentProperties, HandTool,
           Promise, PDFLinkService, PDFOutlineView, PDFAttachmentView,
           OverlayManager, PDFFindController, PDFFindBar, getVisibleElements,
           watchScroll, PDFViewer, PDFRenderingQueue, PresentationModeState,
           parseQueryString, RenderingStates, DEFAULT_SCALE, UNKNOWN_SCALE,
           IGNORE_CURRENT_POSITION_ON_ZOOM: true */

'use strict';

var DEFAULT_URL='';
var DEFAULT_SCALE_DELTA = 1.1;
var MIN_SCALE = 0.25;
var MAX_SCALE = 10.0;
var VIEW_HISTORY_MEMORY = 20;
var SCALE_SELECT_CONTAINER_PADDING = 8;
var SCALE_SELECT_PADDING = 22;
var PAGE_NUMBER_LOADING_INDICATOR = 'visiblePageIsLoading';
var DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT = 5000;

PDFJS.imageResourcesPath = '/static/player/images/';
  PDFJS.workerSrc = '/static/player/build/pdf.worker.js';
  PDFJS.cMapUrl = '/static/player/web/cmaps/';
  PDFJS.cMapPacked = true;

var mozL10n = document.mozL10n || document.webL10n;


var CSS_UNITS = 96.0 / 72.0;
var DEFAULT_SCALE = 'page-width';
var UNKNOWN_SCALE = 0;
var MAX_AUTO_SCALE = 1.25;
var SCROLLBAR_PADDING = 20;
var VERTICAL_PADDING = 5;

// optimised CSS custom property getter/setter
var CustomStyle = (function CustomStyleClosure() {

  // As noted on: http://www.zachstronaut.com/posts/2009/02/17/
  //              animate-css-transforms-firefox-webkit.html
  // in some versions of IE9 it is critical that ms appear in this list
  // before Moz
  var prefixes = ['ms', 'Moz', 'Webkit', 'O'];
  var _cache = {};

  function CustomStyle() {}

  CustomStyle.getProp = function get(propName, element) {
    // check cache only when no element is given
    if (arguments.length === 1 && typeof _cache[propName] === 'string') {
      return _cache[propName];
    }

    element = element || document.documentElement;
    var style = element.style, prefixed, uPropName;

    // test standard property first
    if (typeof style[propName] === 'string') {
      return (_cache[propName] = propName);
    }

    // capitalize
    uPropName = propName.charAt(0).toUpperCase() + propName.slice(1);

    // test vendor specific properties
    for (var i = 0, l = prefixes.length; i < l; i++) {
      prefixed = prefixes[i] + uPropName;
      if (typeof style[prefixed] === 'string') {
        return (_cache[propName] = prefixed);
      }
    }

    //if all fails then set to undefined
    return (_cache[propName] = 'undefined');
  };

  CustomStyle.setProp = function set(propName, element, str) {
    var prop = this.getProp(propName);
    if (prop !== 'undefined') {
      element.style[prop] = str;
    }
  };

  return CustomStyle;
})();

function getFileName(url) {
  var anchor = url.indexOf('#');
  var query = url.indexOf('?');
  var end = Math.min(
    anchor > 0 ? anchor : url.length,
    query > 0 ? query : url.length);
  return url.substring(url.lastIndexOf('/', end) + 1, end);
}

/**
 * Returns scale factor for the canvas. It makes sense for the HiDPI displays.
 * @return {Object} The object with horizontal (sx) and vertical (sy)
                    scales. The scaled property is set to false if scaling is
                    not required, true otherwise.
 */
function getOutputScale(ctx) {
  var devicePixelRatio = window.devicePixelRatio || 1;
  var backingStoreRatio = ctx.webkitBackingStorePixelRatio ||
                          ctx.mozBackingStorePixelRatio ||
                          ctx.msBackingStorePixelRatio ||
                          ctx.oBackingStorePixelRatio ||
                          ctx.backingStorePixelRatio || 1;
  var pixelRatio = devicePixelRatio / backingStoreRatio;
  return {
    sx: pixelRatio,
    sy: pixelRatio,
    scaled: pixelRatio !== 1
  };
}

/**
 * Scrolls specified element into view of its parent.
 * element {Object} The element to be visible.
 * spot {Object} An object with optional top and left properties,
 *               specifying the offset from the top left edge.
 */
function scrollIntoView(element, spot) {
  // Assuming offsetParent is available (it's not available when viewer is in
  // hidden iframe or object). We have to scroll: if the offsetParent is not set
  // producing the error. See also animationStartedClosure.
  var parent = element.offsetParent;
  var offsetY = element.offsetTop + element.clientTop;
  var offsetX = element.offsetLeft + element.clientLeft;
  if (!parent) {
    console.error('offsetParent is not set -- cannot scroll');
    return;
  }
  while (parent.clientHeight === parent.scrollHeight) {
    if (parent.dataset._scaleY) {
      offsetY /= parent.dataset._scaleY;
      offsetX /= parent.dataset._scaleX;
    }
    offsetY += parent.offsetTop;
    offsetX += parent.offsetLeft;
    parent = parent.offsetParent;
    if (!parent) {
      return; // no need to scroll
    }
  }
  if (spot) {
    if (spot.top !== undefined) {
      offsetY += spot.top;
    }
    if (spot.left !== undefined) {
      offsetX += spot.left;
      parent.scrollLeft = offsetX;
    }
  }
  parent.scrollTop = offsetY;
}

/**
 * Helper function to start monitoring the scroll event and converting them into
 * PDF.js friendly one: with scroll debounce and scroll direction.
 */
function watchScroll(viewAreaElement, callback) {
  var debounceScroll = function debounceScroll(evt) {
    if (rAF) {
      return;
    }
    // schedule an invocation of scroll for next animation frame.
    rAF = window.requestAnimationFrame(function viewAreaElementScrolled() {
      rAF = null;

      var currentY = viewAreaElement.scrollTop;
      var lastY = state.lastY;
      if (currentY !== lastY) {
        state.down = currentY > lastY;
      }
      state.lastY = currentY;
      callback(state);
    });
  };

  var state = {
    down: true,
    lastY: viewAreaElement.scrollTop,
    _eventHandler: debounceScroll
  };

  var rAF = null;
  viewAreaElement.addEventListener('scroll', debounceScroll, true);
  return state;
}

/**
 * Helper function to parse query string (e.g. ?param1=value&parm2=...).
 */
function parseQueryString(query) {
  var parts = query.split('&');
  var params = {};
  for (var i = 0, ii = parts.length; i < ii; ++i) {
    var param = parts[i].split('=');
    var key = param[0].toLowerCase();
    var value = param.length > 1 ? param[1] : null;
    params[decodeURIComponent(key)] = decodeURIComponent(value);
  }
  return params;
}

/**
 * Use binary search to find the index of the first item in a given array which
 * passes a given condition. The items are expected to be sorted in the sense
 * that if the condition is true for one item in the array, then it is also true
 * for all following items.
 *
 * @returns {Number} Index of the first array element to pass the test,
 *                   or |items.length| if no such element exists.
 */
function binarySearchFirstItem(items, condition) {
  var minIndex = 0;
  var maxIndex = items.length - 1;

  if (items.length === 0 || !condition(items[maxIndex])) {
    return items.length;
  }
  if (condition(items[minIndex])) {
    return minIndex;
  }

  while (minIndex < maxIndex) {
    var currentIndex = (minIndex + maxIndex) >> 1;
    var currentItem = items[currentIndex];
    if (condition(currentItem)) {
      maxIndex = currentIndex;
    } else {
      minIndex = currentIndex + 1;
    }
  }
  return minIndex; /* === maxIndex */
}

/**
 * Generic helper to find out what elements are visible within a scroll pane.
 */
function getVisibleElements(scrollEl, views, sortByVisibility) {
  var top = scrollEl.scrollTop, bottom = top + scrollEl.clientHeight;
  var left = scrollEl.scrollLeft, right = left + scrollEl.clientWidth;

  function isElementBottomBelowViewTop(view) {
    var element = view.div;
    var elementBottom =
      element.offsetTop + element.clientTop + element.clientHeight;
    return elementBottom > top;
  }

  var visible = [], view, element;
  var currentHeight, viewHeight, hiddenHeight, percentHeight;
  var currentWidth, viewWidth;
  var firstVisibleElementInd = (views.length === 0) ? 0 :
    binarySearchFirstItem(views, isElementBottomBelowViewTop);

  for (var i = firstVisibleElementInd, ii = views.length; i < ii; i++) {
    view = views[i];
    element = view.div;
    currentHeight = element.offsetTop + element.clientTop;
    viewHeight = element.clientHeight;

    if (currentHeight > bottom) {
      break;
    }

    currentWidth = element.offsetLeft + element.clientLeft;
    viewWidth = element.clientWidth;
    if (currentWidth + viewWidth < left || currentWidth > right) {
      continue;
    }
    hiddenHeight = Math.max(0, top - currentHeight) +
      Math.max(0, currentHeight + viewHeight - bottom);
    percentHeight = ((viewHeight - hiddenHeight) * 100 / viewHeight) | 0;

    visible.push({
      id: view.id,
      x: currentWidth,
      y: currentHeight,
      view: view,
      percent: percentHeight
    });
  }

  var first = visible[0];
  var last = visible[visible.length - 1];

  if (sortByVisibility) {
    visible.sort(function(a, b) {
      var pc = a.percent - b.percent;
      if (Math.abs(pc) > 0.001) {
        return -pc;
      }
      return a.id - b.id; // ensure stability
    });
  }
  return {first: first, last: last, views: visible};
}

/**
 * Event handler to suppress context menu.
 */
function noContextMenuHandler(e) {
  e.preventDefault();
}

/**
 * Returns the filename or guessed filename from the url (see issue 3455).
 * url {String} The original PDF location.
 * @return {String} Guessed PDF file name.
 */
function getPDFFileNameFromURL(url) {
  var reURI = /^(?:([^:]+:)?\/\/[^\/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
  //            SCHEME      HOST         1.PATH  2.QUERY   3.REF
  // Pattern to get last matching NAME.pdf
  var reFilename = /[^\/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
  var splitURI = reURI.exec(url);
  var suggestedFilename = reFilename.exec(splitURI[1]) ||
                           reFilename.exec(splitURI[2]) ||
                           reFilename.exec(splitURI[3]);
  if (suggestedFilename) {
    suggestedFilename = suggestedFilename[0];
    if (suggestedFilename.indexOf('%') !== -1) {
      // URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf
      try {
        suggestedFilename =
          reFilename.exec(decodeURIComponent(suggestedFilename))[0];
      } catch(e) { // Possible (extremely rare) errors:
        // URIError "Malformed URI", e.g. for "%AA.pdf"
        // TypeError "null has no properties", e.g. for "%2F.pdf"
      }
    }
  }
  return suggestedFilename || 'document.pdf';
}

var ProgressBar = (function ProgressBarClosure() {

  function clamp(v, min, max) {
    return Math.min(Math.max(v, min), max);
  }

  function ProgressBar(id, opts) {
    this.visible = true;

    // Fetch the sub-elements for later.
    this.div = document.querySelector(id + ' .progress');

    // Get the loading bar element, so it can be resized to fit the viewer.
    this.bar = this.div.parentNode;

    // Get options, with sensible defaults.
    this.height = opts.height || 100;
    this.width = opts.width || 100;
    this.units = opts.units || '%';

    // Initialize heights.
    this.div.style.height = this.height + this.units;
    this.percent = 0;
  }

  ProgressBar.prototype = {

    updateBar: function ProgressBar_updateBar() {
      if (this._indeterminate) {
        this.div.classList.add('indeterminate');
        this.div.style.width = this.width + this.units;
        return;
      }

      this.div.classList.remove('indeterminate');
      var progressSize = this.width * this._percent / 100;
      this.div.style.width = progressSize + this.units;
    },

    get percent() {
      return this._percent;
    },

    set percent(val) {
      this._indeterminate = isNaN(val);
      this._percent = clamp(val, 0, 100);
      this.updateBar();
    },

    setWidth: function ProgressBar_setWidth(viewer) {
      if (viewer) {
        var container = viewer.parentNode;
        var scrollbarWidth = container.offsetWidth - viewer.offsetWidth;
        if (scrollbarWidth > 0) {
          this.bar.setAttribute('style', 'width: calc(100% - ' +
                                         scrollbarWidth + 'px);');
        }
      }
    },

    hide: function ProgressBar_hide() {
      if (!this.visible) {
        return;
      }
      this.visible = false;
      this.bar.classList.add('hidden');
      document.body.classList.remove('loadingInProgress');
    },

    show: function ProgressBar_show() {
      if (this.visible) {
        return;
      }
      this.visible = true;
      document.body.classList.add('loadingInProgress');
      this.bar.classList.remove('hidden');
    }
  };

  return ProgressBar;
})();



var DEFAULT_PREFERENCES = {
  showPreviousViewOnLoad: true,
  defaultZoomValue: '',
  sidebarViewOnLoad: 0,
  enableHandToolOnLoad: false,
  enableWebGL: false,
  pdfBugEnabled: false,
  disableRange: false,
  disableStream: false,
  disableAutoFetch: true,
  disableFontFace: false,
  disableTextLayer: false,
  useOnlyCssZoom: false
};


var SidebarView = {
  NONE: 0,
  THUMBS: 1,
  OUTLINE: 2,
  ATTACHMENTS: 3
};

/**
 * Preferences - Utility for storing persistent settings.
 *   Used for settings that should be applied to all opened documents,
 *   or every time the viewer is loaded.
 */
var Preferences = {
  prefs: Object.create(DEFAULT_PREFERENCES),
  isInitializedPromiseResolved: false,
  initializedPromise: null,

  /**
   * Initialize and fetch the current preference values from storage.
   * @return {Promise} A promise that is resolved when the preferences
   *                   have been initialized.
   */
  initialize: function preferencesInitialize() {
    return this.initializedPromise =
        this._readFromStorage(DEFAULT_PREFERENCES).then(function(prefObj) {
      this.isInitializedPromiseResolved = true;
      if (prefObj) {
        this.prefs = prefObj;
      }
    }.bind(this));
  },

  /**
   * Stub function for writing preferences to storage.
   * NOTE: This should be overridden by a build-specific function defined below.
   * @param {Object} prefObj The preferences that should be written to storage.
   * @return {Promise} A promise that is resolved when the preference values
   *                   have been written.
   */
  _writeToStorage: function preferences_writeToStorage(prefObj) {
    return Promise.resolve();
  },

  /**
   * Stub function for reading preferences from storage.
   * NOTE: This should be overridden by a build-specific function defined below.
   * @param {Object} prefObj The preferences that should be read from storage.
   * @return {Promise} A promise that is resolved with an {Object} containing
   *                   the preferences that have been read.
   */
  _readFromStorage: function preferences_readFromStorage(prefObj) {
    return Promise.resolve();
  },

  /**
   * Reset the preferences to their default values and update storage.
   * @return {Promise} A promise that is resolved when the preference values
   *                   have been reset.
   */
  reset: function preferencesReset() {
    return this.initializedPromise.then(function() {
      this.prefs = Object.create(DEFAULT_PREFERENCES);
      return this._writeToStorage(DEFAULT_PREFERENCES);
    }.bind(this));
  },

  /**
   * Replace the current preference values with the ones from storage.
   * @return {Promise} A promise that is resolved when the preference values
   *                   have been updated.
   */
  reload: function preferencesReload() {
    return this.initializedPromise.then(function () {
      this._readFromStorage(DEFAULT_PREFERENCES).then(function(prefObj) {
        if (prefObj) {
          this.prefs = prefObj;
        }
      }.bind(this));
    }.bind(this));
  },

  /**
   * Set the value of a preference.
   * @param {string} name The name of the preference that should be changed.
   * @param {boolean|number|string} value The new value of the preference.
   * @return {Promise} A promise that is resolved when the value has been set,
   *                   provided that the preference exists and the types match.
   */
  set: function preferencesSet(name, value) {
    return this.initializedPromise.then(function () {
      if (DEFAULT_PREFERENCES[name] === undefined) {
        throw new Error('preferencesSet: \'' + name + '\' is undefined.');
      } else if (value === undefined) {
        throw new Error('preferencesSet: no value is specified.');
      }
      var valueType = typeof value;
      var defaultType = typeof DEFAULT_PREFERENCES[name];

      if (valueType !== defaultType) {
        if (valueType === 'number' && defaultType === 'string') {
          value = value.toString();
        } else {
          throw new Error('Preferences_set: \'' + value + '\' is a \"' +
                          valueType + '\", expected \"' + defaultType + '\".');
        }
      } else {
        if (valueType === 'number' && (value | 0) !== value) {
          throw new Error('Preferences_set: \'' + value +
                          '\' must be an \"integer\".');
        }
      }
      this.prefs[name] = value;
      return this._writeToStorage(this.prefs);
    }.bind(this));
  },

  /**
   * Get the value of a preference.
   * @param {string} name The name of the preference whose value is requested.
   * @return {Promise} A promise that is resolved with a {boolean|number|string}
   *                   containing the value of the preference.
   */
  get: function preferencesGet(name) {
    return this.initializedPromise.then(function () {
      var defaultValue = DEFAULT_PREFERENCES[name];

      if (defaultValue === undefined) {
        throw new Error('preferencesGet: \'' + name + '\' is undefined.');
      } else {
        var prefValue = this.prefs[name];

        if (prefValue !== undefined) {
          return prefValue;
        }
      }
      return defaultValue;
    }.bind(this));
  }
};



Preferences._writeToStorage = function (prefObj) {
  return new Promise(function (resolve) {
    localStorage.setItem('pdfjs.preferences', JSON.stringify(prefObj));
    resolve();
  });
};

Preferences._readFromStorage = function (prefObj) {
  return new Promise(function (resolve) {
    var readPrefs = JSON.parse(localStorage.getItem('pdfjs.preferences'));
    resolve(readPrefs);
  });
};


(function mozPrintCallbackPolyfillClosure() {
  if ('mozPrintCallback' in document.createElement('canvas')) {
    return;
  }
  // Cause positive result on feature-detection:
  HTMLCanvasElement.prototype.mozPrintCallback = undefined;

  var canvases;   // During print task: non-live NodeList of <canvas> elements
  var index;      // Index of <canvas> element that is being processed

  var print = window.print;
  window.print = function print() {
    if (canvases) {
      console.warn('Ignored window.print() because of a pending print job.');
      return;
    }
    try {
      dispatchEvent('beforeprint');
    } finally {
      canvases = document.querySelectorAll('canvas');
      index = -1;
      next();
    }
  };

  function dispatchEvent(eventType) {
    var event = document.createEvent('CustomEvent');
    event.initCustomEvent(eventType, false, false, 'custom');
    window.dispatchEvent(event);
  }

  function next() {
    if (!canvases) {
      return; // Print task cancelled by user (state reset in abort())
    }

    renderProgress();
    if (++index < canvases.length) {
      var canvas = canvases[index];
      if (typeof canvas.mozPrintCallback === 'function') {
        canvas.mozPrintCallback({
          context: canvas.getContext('2d'),
          abort: abort,
          done: next
        });
      } else {
        next();
      }
    } else {
      renderProgress();
      print.call(window);
      setTimeout(abort, 20); // Tidy-up
    }
  }

  function abort() {
    if (canvases) {
      canvases = null;
      renderProgress();
      dispatchEvent('afterprint');
    }
  }

  function renderProgress() {
    var progressContainer = document.getElementById('mozPrintCallback-shim');
    if (canvases && canvases.length) {
      var progress = Math.round(100 * index / canvases.length);
      var progressBar = progressContainer.querySelector('progress');
      var progressPerc = progressContainer.querySelector('.relative-progress');
      progressBar.value = progress;
      progressPerc.textContent = progress + '%';
      progressContainer.removeAttribute('hidden');
      progressContainer.onclick = abort;
    } else {
      progressContainer.setAttribute('hidden', '');
    }
  }

  var hasAttachEvent = !!document.attachEvent;

  window.addEventListener('keydown', function(event) {
    // Intercept Cmd/Ctrl + P in all browsers.
    // Also intercept Cmd/Ctrl + Shift + P in Chrome and Opera
    if (event.keyCode === 80/*P*/ && (event.ctrlKey || event.metaKey) &&
        !event.altKey && (!event.shiftKey || window.chrome || window.opera)) {
      window.print();
      if (hasAttachEvent) {
        // Only attachEvent can cancel Ctrl + P dialog in IE <=10
        // attachEvent is gone in IE11, so the dialog will re-appear in IE11.
        return;
      }
      event.preventDefault();
      if (event.stopImmediatePropagation) {
        event.stopImmediatePropagation();
      } else {
        event.stopPropagation();
      }
      return;
    }
    if (event.keyCode === 27 && canvases) { // Esc
      abort();
    }
  }, true);
  if (hasAttachEvent) {
    document.attachEvent('onkeydown', function(event) {
      event = event || window.event;
      if (event.keyCode === 80/*P*/ && event.ctrlKey) {
        event.keyCode = 0;
        return false;
      }
    });
  }

  if ('onbeforeprint' in window) {
    // Do not propagate before/afterprint events when they are not triggered
    // from within this polyfill. (FF/IE).
    var stopPropagationIfNeeded = function(event) {
      if (event.detail !== 'custom' && event.stopImmediatePropagation) {
        event.stopImmediatePropagation();
      }
    };
    window.addEventListener('beforeprint', stopPropagationIfNeeded, false);
    window.addEventListener('afterprint', stopPropagationIfNeeded, false);
  }
})();



var DownloadManager = (function DownloadManagerClosure() {

  function download(blobUrl, filename) {
    var a = document.createElement('a');
    if (a.click) {
      // Use a.click() if available. Otherwise, Chrome might show
      // "Unsafe JavaScript attempt to initiate a navigation change
      //  for frame with URL" and not open the PDF at all.
      // Supported by (not mentioned = untested):
      // - Firefox 6 - 19 (4- does not support a.click, 5 ignores a.click)
      // - Chrome 19 - 26 (18- does not support a.click)
      // - Opera 9 - 12.15
      // - Internet Explorer 6 - 10
      // - Safari 6 (5.1- does not support a.click)
      a.href = blobUrl;
      a.target = '_parent';
      // Use a.download if available. This increases the likelihood that
      // the file is downloaded instead of opened by another PDF plugin.
      if ('download' in a) {
        a.download = filename;
      }
      // <a> must be in the document for IE and recent Firefox versions.
      // (otherwise .click() is ignored)
      (document.body || document.documentElement).appendChild(a);
      a.click();
      a.parentNode.removeChild(a);
    } else {
      if (window.top === window &&
          blobUrl.split('#')[0] === window.location.href.split('#')[0]) {
        // If _parent == self, then opening an identical URL with different
        // location hash will only cause a navigation, not a download.
        var padCharacter = blobUrl.indexOf('?') === -1 ? '?' : '&';
        blobUrl = blobUrl.replace(/#|$/, padCharacter + '$&');
      }
      window.open(blobUrl, '_parent');
    }
  }

  function DownloadManager() {}

  DownloadManager.prototype = {
    downloadUrl: function DownloadManager_downloadUrl(url, filename) {
      if (!PDFJS.isValidUrl(url, true)) {
        return; // restricted/invalid URL
      }

      download(url + '#pdfjs.action=download', filename);
    },

    downloadData: function DownloadManager_downloadData(data, filename,
                                                        contentType) {
      if (navigator.msSaveBlob) { // IE10 and above
        return navigator.msSaveBlob(new Blob([data], { type: contentType }),
                                    filename);
      }

      var blobUrl = PDFJS.createObjectURL(data, contentType);
      download(blobUrl, filename);
    },

    download: function DownloadManager_download(blob, url, filename) {
      if (!URL) {
        // URL.createObjectURL is not supported
        this.downloadUrl(url, filename);
        return;
      }

      if (navigator.msSaveBlob) {
        // IE10 / IE11
        if (!navigator.msSaveBlob(blob, filename)) {
          this.downloadUrl(url, filename);
        }
        return;
      }

      var blobUrl = URL.createObjectURL(blob);
      download(blobUrl, filename);
    }
  };

  return DownloadManager;
})();





/**
 * View History - This is a utility for saving various view parameters for
 *                recently opened files.
 *
 * The way that the view parameters are stored depends on how PDF.js is built,
 * for 'node make <flag>' the following cases exist:
 *  - FIREFOX or MOZCENTRAL - uses sessionStorage.
 *  - B2G                   - uses asyncStorage.
 *  - GENERIC or CHROME     - uses localStorage, if it is available.
 */
var ViewHistory = (function ViewHistoryClosure() {
  function ViewHistory(fingerprint) {
    this.fingerprint = fingerprint;
    this.isInitializedPromiseResolved = false;
    this.initializedPromise =
        this._readFromStorage().then(function (databaseStr) {
      this.isInitializedPromiseResolved = true;

      var database = JSON.parse(databaseStr || '{}');
      if (!('files' in database)) {
        database.files = [];
      }
      if (database.files.length >= VIEW_HISTORY_MEMORY) {
        database.files.shift();
      }
      var index;
      for (var i = 0, length = database.files.length; i < length; i++) {
        var branch = database.files[i];
        if (branch.fingerprint === this.fingerprint) {
          index = i;
          break;
        }
      }
      if (typeof index !== 'number') {
        index = database.files.push({fingerprint: this.fingerprint}) - 1;
      }
      this.file = database.files[index];
      this.database = database;
    }.bind(this));
  }

  ViewHistory.prototype = {
    _writeToStorage: function ViewHistory_writeToStorage() {
      return new Promise(function (resolve) {
        var databaseStr = JSON.stringify(this.database);



        localStorage.setItem('database', databaseStr);
        resolve();
      }.bind(this));
    },

    _readFromStorage: function ViewHistory_readFromStorage() {
      return new Promise(function (resolve) {


        resolve(localStorage.getItem('database'));
      });
    },

    set: function ViewHistory_set(name, val) {
      if (!this.isInitializedPromiseResolved) {
        return;
      }
      this.file[name] = val;
      return this._writeToStorage();
    },

    setMultiple: function ViewHistory_setMultiple(properties) {
      if (!this.isInitializedPromiseResolved) {
        return;
      }
      for (var name in properties) {
        this.file[name] = properties[name];
      }
      return this._writeToStorage();
    },

    get: function ViewHistory_get(name, defaultValue) {
      if (!this.isInitializedPromiseResolved) {
        return defaultValue;
      }
      return this.file[name] || defaultValue;
    }
  };

  return ViewHistory;
})();


/**
 * Creates a "search bar" given a set of DOM elements that act as controls
 * for searching or for setting search preferences in the UI. This object
 * also sets up the appropriate events for the controls. Actual searching
 * is done by PDFFindController.
 */
var PDFFindBar = (function PDFFindBarClosure() {
  function PDFFindBar(options) {
    this.opened = false;
    this.bar = options.bar || null;
    this.toggleButton = options.toggleButton || null;
    this.findField = options.findField || null;
    this.highlightAll = options.highlightAllCheckbox || null;
    this.caseSensitive = options.caseSensitiveCheckbox || null;
    this.findMsg = options.findMsg || null;
    this.findStatusIcon = options.findStatusIcon || null;
    this.findPreviousButton = options.findPreviousButton || null;
    this.findNextButton = options.findNextButton || null;
    this.findController = options.findController || null;

    if (this.findController === null) {
      throw new Error('PDFFindBar cannot be used without a ' +
                      'PDFFindController instance.');
    }

    // Add event listeners to the DOM elements.
    var self = this;
    this.toggleButton.addEventListener('click', function() {
      self.toggle();
    });

    this.findField.addEventListener('input', function() {
      self.dispatchEvent('');
    });

    this.bar.addEventListener('keydown', function(evt) {
      switch (evt.keyCode) {
        case 13: // Enter
          if (evt.target === self.findField) {
            self.dispatchEvent('again', evt.shiftKey);
          }
          break;
        case 27: // Escape
          self.close();
          break;
      }
    });

    this.findPreviousButton.addEventListener('click', function() {
      self.dispatchEvent('again', true);
    });

    this.findNextButton.addEventListener('click', function() {
      self.dispatchEvent('again', false);
    });

    this.highlightAll.addEventListener('click', function() {
      self.dispatchEvent('highlightallchange');
    });

    this.caseSensitive.addEventListener('click', function() {
      self.dispatchEvent('casesensitivitychange');
    });
  }

  PDFFindBar.prototype = {
    dispatchEvent: function PDFFindBar_dispatchEvent(type, findPrev) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('find' + type, true, true, {
        query: this.findField.value,
        caseSensitive: this.caseSensitive.checked,
        highlightAll: this.highlightAll.checked,
        findPrevious: findPrev
      });
      return window.dispatchEvent(event);
    },

    updateUIState: function PDFFindBar_updateUIState(state, previous) {
      var notFound = false;
      var findMsg = '';
      var status = '';

      switch (state) {
        case FindStates.FIND_FOUND:
          break;

        case FindStates.FIND_PENDING:
          status = 'pending';
          break;

        case FindStates.FIND_NOTFOUND:
          findMsg = mozL10n.get('find_not_found', null, 'Phrase not found');
          notFound = true;
          break;

        case FindStates.FIND_WRAPPED:
          if (previous) {
            findMsg = mozL10n.get('find_reached_top', null,
              'Reached top of document, continued from bottom');
          } else {
            findMsg = mozL10n.get('find_reached_bottom', null,
              'Reached end of document, continued from top');
          }
          break;
      }

      if (notFound) {
        this.findField.classList.add('notFound');
      } else {
        this.findField.classList.remove('notFound');
      }

      this.findField.setAttribute('data-status', status);
      this.findMsg.textContent = findMsg;
    },

    open: function PDFFindBar_open() {
      if (!this.opened) {
        this.opened = true;
        this.toggleButton.classList.add('toggled');
        this.bar.classList.remove('hidden');
      }
      this.findField.select();
      this.findField.focus();
    },

    close: function PDFFindBar_close() {
      if (!this.opened) {
        return;
      }
      this.opened = false;
      this.toggleButton.classList.remove('toggled');
      this.bar.classList.add('hidden');
      this.findController.active = false;
    },

    toggle: function PDFFindBar_toggle() {
      if (this.opened) {
        this.close();
      } else {
        this.open();
      }
    }
  };
  return PDFFindBar;
})();


var FindStates = {
  FIND_FOUND: 0,
  FIND_NOTFOUND: 1,
  FIND_WRAPPED: 2,
  FIND_PENDING: 3
};

var FIND_SCROLL_OFFSET_TOP = -50;
var FIND_SCROLL_OFFSET_LEFT = -400;

/**
 * Provides "search" or "find" functionality for the PDF.
 * This object actually performs the search for a given string.
 */
var PDFFindController = (function PDFFindControllerClosure() {
  function PDFFindController(options) {
    this.startedTextExtraction = false;
    this.extractTextPromises = [];
    this.pendingFindMatches = {};
    this.active = false; // If active, find results will be highlighted.
    this.pageContents = []; // Stores the text for each page.
    this.pageMatches = [];
    this.selected = { // Currently selected match.
      pageIdx: -1,
      matchIdx: -1
    };
    this.offset = { // Where the find algorithm currently is in the document.
      pageIdx: null,
      matchIdx: null
    };
    this.pagesToSearch = null;
    this.resumePageIdx = null;
    this.state = null;
    this.dirtyMatch = false;
    this.findTimeout = null;
    this.pdfViewer = options.pdfViewer || null;
    this.integratedFind = options.integratedFind || false;
    this.charactersToNormalize = {
      '\u2018': '\'', // Left single quotation mark
      '\u2019': '\'', // Right single quotation mark
      '\u201A': '\'', // Single low-9 quotation mark
      '\u201B': '\'', // Single high-reversed-9 quotation mark
      '\u201C': '"', // Left double quotation mark
      '\u201D': '"', // Right double quotation mark
      '\u201E': '"', // Double low-9 quotation mark
      '\u201F': '"', // Double high-reversed-9 quotation mark
      '\u00BC': '1/4', // Vulgar fraction one quarter
      '\u00BD': '1/2', // Vulgar fraction one half
      '\u00BE': '3/4', // Vulgar fraction three quarters
      '\u00A0': ' ' // No-break space
    };
    this.findBar = options.findBar || null;

    // Compile the regular expression for text normalization once
    var replace = Object.keys(this.charactersToNormalize).join('');
    this.normalizationRegex = new RegExp('[' + replace + ']', 'g');

    var events = [
      'find',
      'findagain',
      'findhighlightallchange',
      'findcasesensitivitychange'
    ];

    this.firstPagePromise = new Promise(function (resolve) {
      this.resolveFirstPage = resolve;
    }.bind(this));
    this.handleEvent = this.handleEvent.bind(this);

    for (var i = 0, len = events.length; i < len; i++) {
      window.addEventListener(events[i], this.handleEvent);
    }
  }

  PDFFindController.prototype = {
    setFindBar: function PDFFindController_setFindBar(findBar) {
      this.findBar = findBar;
    },

    reset: function PDFFindController_reset() {
      this.startedTextExtraction = false;
      this.extractTextPromises = [];
      this.active = false;
    },

    normalize: function PDFFindController_normalize(text) {
      var self = this;
      return text.replace(this.normalizationRegex, function (ch) {
        return self.charactersToNormalize[ch];
      });
    },

    calcFindMatch: function PDFFindController_calcFindMatch(pageIndex) {
      var pageContent = this.normalize(this.pageContents[pageIndex]);
      var query = this.normalize(this.state.query);
      var caseSensitive = this.state.caseSensitive;
      var queryLen = query.length;

      if (queryLen === 0) {
        return; // Do nothing: the matches should be wiped out already.
      }

      if (!caseSensitive) {
        pageContent = pageContent.toLowerCase();
        query = query.toLowerCase();
      }

      var matches = [];
      var matchIdx = -queryLen;
      while (true) {
        matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
        if (matchIdx === -1) {
          break;
        }
        matches.push(matchIdx);
      }
      this.pageMatches[pageIndex] = matches;
      this.updatePage(pageIndex);
      if (this.resumePageIdx === pageIndex) {
        this.resumePageIdx = null;
        this.nextPageMatch();
      }
    },

    extractText: function PDFFindController_extractText() {
      if (this.startedTextExtraction) {
        return;
      }
      this.startedTextExtraction = true;

      this.pageContents = [];
      var extractTextPromisesResolves = [];
      var numPages = this.pdfViewer.pagesCount;
      for (var i = 0; i < numPages; i++) {
        this.extractTextPromises.push(new Promise(function (resolve) {
          extractTextPromisesResolves.push(resolve);
        }));
      }

      var self = this;
      function extractPageText(pageIndex) {
        self.pdfViewer.getPageTextContent(pageIndex).then(
          function textContentResolved(textContent) {
            var textItems = textContent.items;
            var str = [];

            for (var i = 0, len = textItems.length; i < len; i++) {
              str.push(textItems[i].str);
            }

            // Store the pageContent as a string.
            self.pageContents.push(str.join(''));

            extractTextPromisesResolves[pageIndex](pageIndex);
            if ((pageIndex + 1) < self.pdfViewer.pagesCount) {
              extractPageText(pageIndex + 1);
            }
          }
        );
      }
      extractPageText(0);
    },

    handleEvent: function PDFFindController_handleEvent(e) {
      if (this.state === null || e.type !== 'findagain') {
        this.dirtyMatch = true;
      }
      this.state = e.detail;
      this.updateUIState(FindStates.FIND_PENDING);

      this.firstPagePromise.then(function() {
        this.extractText();

        clearTimeout(this.findTimeout);
        if (e.type === 'find') {
          // Only trigger the find action after 250ms of silence.
          this.findTimeout = setTimeout(this.nextMatch.bind(this), 250);
        } else {
          this.nextMatch();
        }
      }.bind(this));
    },

    updatePage: function PDFFindController_updatePage(index) {
      if (this.selected.pageIdx === index) {
        // If the page is selected, scroll the page into view, which triggers
        // rendering the page, which adds the textLayer. Once the textLayer is
        // build, it will scroll onto the selected match.
        this.pdfViewer.scrollPageIntoView(index + 1);
      }

      var page = this.pdfViewer.getPageView(index);
      if (page.textLayer) {
        page.textLayer.updateMatches();
      }
    },

    nextMatch: function PDFFindController_nextMatch() {
      var previous = this.state.findPrevious;
      var currentPageIndex = this.pdfViewer.currentPageNumber - 1;
      var numPages = this.pdfViewer.pagesCount;

      this.active = true;

      if (this.dirtyMatch) {
        // Need to recalculate the matches, reset everything.
        this.dirtyMatch = false;
        this.selected.pageIdx = this.selected.matchIdx = -1;
        this.offset.pageIdx = currentPageIndex;
        this.offset.matchIdx = null;
        this.hadMatch = false;
        this.resumePageIdx = null;
        this.pageMatches = [];
        var self = this;

        for (var i = 0; i < numPages; i++) {
          // Wipe out any previous highlighted matches.
          this.updatePage(i);

          // As soon as the text is extracted start finding the matches.
          if (!(i in this.pendingFindMatches)) {
            this.pendingFindMatches[i] = true;
            this.extractTextPromises[i].then(function(pageIdx) {
              delete self.pendingFindMatches[pageIdx];
              self.calcFindMatch(pageIdx);
            });
          }
        }
      }

      // If there's no query there's no point in searching.
      if (this.state.query === '') {
        this.updateUIState(FindStates.FIND_FOUND);
        return;
      }

      // If we're waiting on a page, we return since we can't do anything else.
      if (this.resumePageIdx) {
        return;
      }

      var offset = this.offset;
      // Keep track of how many pages we should maximally iterate through.
      this.pagesToSearch = numPages;
      // If there's already a matchIdx that means we are iterating through a
      // page's matches.
      if (offset.matchIdx !== null) {
        var numPageMatches = this.pageMatches[offset.pageIdx].length;
        if ((!previous && offset.matchIdx + 1 < numPageMatches) ||
            (previous && offset.matchIdx > 0)) {
          // The simple case; we just have advance the matchIdx to select
          // the next match on the page.
          this.hadMatch = true;
          offset.matchIdx = (previous ? offset.matchIdx - 1 :
                                        offset.matchIdx + 1);
          this.updateMatch(true);
          return;
        }
        // We went beyond the current page's matches, so we advance to
        // the next page.
        this.advanceOffsetPage(previous);
      }
      // Start searching through the page.
      this.nextPageMatch();
    },

    matchesReady: function PDFFindController_matchesReady(matches) {
      var offset = this.offset;
      var numMatches = matches.length;
      var previous = this.state.findPrevious;

      if (numMatches) {
        // There were matches for the page, so initialize the matchIdx.
        this.hadMatch = true;
        offset.matchIdx = (previous ? numMatches - 1 : 0);
        this.updateMatch(true);
        return true;
      } else {
        // No matches, so attempt to search the next page.
        this.advanceOffsetPage(previous);
        if (offset.wrapped) {
          offset.matchIdx = null;
          if (this.pagesToSearch < 0) {
            // No point in wrapping again, there were no matches.
            this.updateMatch(false);
            // while matches were not found, searching for a page
            // with matches should nevertheless halt.
            return true;
          }
        }
        // Matches were not found (and searching is not done).
        return false;
      }
    },

    /**
     * The method is called back from the text layer when match presentation
     * is updated.
     * @param {number} pageIndex - page index.
     * @param {number} index - match index.
     * @param {Array} elements - text layer div elements array.
     * @param {number} beginIdx - start index of the div array for the match.
     * @param {number} endIdx - end index of the div array for the match.
     */
    updateMatchPosition: function PDFFindController_updateMatchPosition(
        pageIndex, index, elements, beginIdx, endIdx) {
      if (this.selected.matchIdx === index &&
          this.selected.pageIdx === pageIndex) {
        scrollIntoView(elements[beginIdx], {
          top: FIND_SCROLL_OFFSET_TOP,
          left: FIND_SCROLL_OFFSET_LEFT
        });
      }
    },

    nextPageMatch: function PDFFindController_nextPageMatch() {
      if (this.resumePageIdx !== null) {
        console.error('There can only be one pending page.');
      }
      do {
        var pageIdx = this.offset.pageIdx;
        var matches = this.pageMatches[pageIdx];
        if (!matches) {
          // The matches don't exist yet for processing by "matchesReady",
          // so set a resume point for when they do exist.
          this.resumePageIdx = pageIdx;
          break;
        }
      } while (!this.matchesReady(matches));
    },

    advanceOffsetPage: function PDFFindController_advanceOffsetPage(previous) {
      var offset = this.offset;
      var numPages = this.extractTextPromises.length;
      offset.pageIdx = (previous ? offset.pageIdx - 1 : offset.pageIdx + 1);
      offset.matchIdx = null;

      this.pagesToSearch--;

      if (offset.pageIdx >= numPages || offset.pageIdx < 0) {
        offset.pageIdx = (previous ? numPages - 1 : 0);
        offset.wrapped = true;
      }
    },

    updateMatch: function PDFFindController_updateMatch(found) {
      var state = FindStates.FIND_NOTFOUND;
      var wrapped = this.offset.wrapped;
      this.offset.wrapped = false;

      if (found) {
        var previousPage = this.selected.pageIdx;
        this.selected.pageIdx = this.offset.pageIdx;
        this.selected.matchIdx = this.offset.matchIdx;
        state = (wrapped ? FindStates.FIND_WRAPPED : FindStates.FIND_FOUND);
        // Update the currently selected page to wipe out any selected matches.
        if (previousPage !== -1 && previousPage !== this.selected.pageIdx) {
          this.updatePage(previousPage);
        }
      }

      this.updateUIState(state, this.state.findPrevious);
      if (this.selected.pageIdx !== -1) {
        this.updatePage(this.selected.pageIdx);
      }
    },

    updateUIState: function PDFFindController_updateUIState(state, previous) {
      if (this.integratedFind) {
        FirefoxCom.request('updateFindControlState',
                           { result: state, findPrevious: previous });
        return;
      }
      if (this.findBar === null) {
        throw new Error('PDFFindController is not initialized with a ' +
                        'PDFFindBar instance.');
      }
      this.findBar.updateUIState(state, previous);
    }
  };
  return PDFFindController;
})();


/**
 * Performs navigation functions inside PDF, such as opening specified page,
 * or destination.
 * @class
 * @implements {IPDFLinkService}
 */
var PDFLinkService = (function () {
  /**
   * @constructs PDFLinkService
   */
  function PDFLinkService() {
    this.baseUrl = null;
    this.pdfDocument = null;
    this.pdfViewer = null;
    this.pdfHistory = null;

    this._pagesRefCache = null;
  }

  PDFLinkService.prototype = {
    setDocument: function PDFLinkService_setDocument(pdfDocument, baseUrl) {
      this.baseUrl = baseUrl;
      this.pdfDocument = pdfDocument;
      this._pagesRefCache = Object.create(null);
    },

    setViewer: function PDFLinkService_setViewer(pdfViewer) {
      this.pdfViewer = pdfViewer;
    },

    setHistory: function PDFLinkService_setHistory(pdfHistory) {
      this.pdfHistory = pdfHistory;
    },

    /**
     * @returns {number}
     */
    get pagesCount() {
      return this.pdfDocument.numPages;
    },

    /**
     * @returns {number}
     */
    get page() {
      return this.pdfViewer.currentPageNumber;
    },

    /**
     * @param {number} value
     */
    set page(value) {
      this.pdfViewer.currentPageNumber = value;
    },

    /**
     * @param dest - The PDF destination object.
     */
    navigateTo: function PDFLinkService_navigateTo(dest) {
      var destString = '';
      var self = this;

      var goToDestination = function(destRef) {
        // dest array looks like that: <page-ref> </XYZ|FitXXX> <args..>
        var pageNumber = destRef instanceof Object ?
          self._pagesRefCache[destRef.num + ' ' + destRef.gen + ' R'] :
          (destRef + 1);
        if (pageNumber) {
          if (pageNumber > self.pagesCount) {
            pageNumber = self.pagesCount;
          }
          self.pdfViewer.scrollPageIntoView(pageNumber, dest);

          if (self.pdfHistory) {
            // Update the browsing history.
            self.pdfHistory.push({
              dest: dest,
              hash: destString,
              page: pageNumber
            });
          }
        } else {
          self.pdfDocument.getPageIndex(destRef).then(function (pageIndex) {
            var pageNum = pageIndex + 1;
            var cacheKey = destRef.num + ' ' + destRef.gen + ' R';
            self._pagesRefCache[cacheKey] = pageNum;
            goToDestination(destRef);
          });
        }
      };

      var destinationPromise;
      if (typeof dest === 'string') {
        destString = dest;
        destinationPromise = this.pdfDocument.getDestination(dest);
      } else {
        destinationPromise = Promise.resolve(dest);
      }
      destinationPromise.then(function(destination) {
        dest = destination;
        if (!(destination instanceof Array)) {
          return; // invalid destination
        }
        goToDestination(destination[0]);
      });
    },

    /**
     * @param dest - The PDF destination object.
     * @returns {string} The hyperlink to the PDF object.
     */
    getDestinationHash: function PDFLinkService_getDestinationHash(dest) {
      if (typeof dest === 'string') {
        return this.getAnchorUrl('#' + escape(dest));
      }
      if (dest instanceof Array) {
        var destRef = dest[0]; // see navigateTo method for dest format
        var pageNumber = destRef instanceof Object ?
          this._pagesRefCache[destRef.num + ' ' + destRef.gen + ' R'] :
          (destRef + 1);
        if (pageNumber) {
          var pdfOpenParams = this.getAnchorUrl('#page=' + pageNumber);
          var destKind = dest[1];
          if (typeof destKind === 'object' && 'name' in destKind &&
              destKind.name === 'XYZ') {
            var scale = (dest[4] || this.pdfViewer.currentScaleValue);
            var scaleNumber = parseFloat(scale);
            if (scaleNumber) {
              scale = scaleNumber * 100;
            }
            pdfOpenParams += '&zoom=' + scale;
            if (dest[2] || dest[3]) {
              pdfOpenParams += ',' + (dest[2] || 0) + ',' + (dest[3] || 0);
            }
          }
          return pdfOpenParams;
        }
      }
      return '';
    },

    /**
     * Prefix the full url on anchor links to make sure that links are resolved
     * relative to the current URL instead of the one defined in <base href>.
     * @param {String} anchor The anchor hash, including the #.
     * @returns {string} The hyperlink to the PDF object.
     */
    getAnchorUrl: function PDFLinkService_getAnchorUrl(anchor) {
      return (this.baseUrl || '') + anchor;
    },

    /**
     * @param {string} hash
     */
    setHash: function PDFLinkService_setHash(hash) {
      if (hash.indexOf('=') >= 0) {
        var params = parseQueryString(hash);
        // borrowing syntax from "Parameters for Opening PDF Files"
        if ('nameddest' in params) {
          if (this.pdfHistory) {
            this.pdfHistory.updateNextHashParam(params.nameddest);
          }
          this.navigateTo(params.nameddest);
          return;
        }
        var pageNumber, dest;
        if ('page' in params) {
          pageNumber = (params.page | 0) || 1;
        }
        if ('zoom' in params) {
          // Build the destination array.
          var zoomArgs = params.zoom.split(','); // scale,left,top
          var zoomArg = zoomArgs[0];
          var zoomArgNumber = parseFloat(zoomArg);

          if (zoomArg.indexOf('Fit') === -1) {
            // If the zoomArg is a number, it has to get divided by 100. If it's
            // a string, it should stay as it is.
            dest = [null, { name: 'XYZ' },
                    zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null,
                    zoomArgs.length > 2 ? (zoomArgs[2] | 0) : null,
                    (zoomArgNumber ? zoomArgNumber / 100 : zoomArg)];
          } else {
            if (zoomArg === 'Fit' || zoomArg === 'FitB') {
              dest = [null, { name: zoomArg }];
            } else if ((zoomArg === 'FitH' || zoomArg === 'FitBH') ||
                       (zoomArg === 'FitV' || zoomArg === 'FitBV')) {
              dest = [null, { name: zoomArg },
                      zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null];
            } else if (zoomArg === 'FitR') {
              if (zoomArgs.length !== 5) {
                console.error('PDFLinkService_setHash: ' +
                              'Not enough parameters for \'FitR\'.');
              } else {
                dest = [null, { name: zoomArg },
                        (zoomArgs[1] | 0), (zoomArgs[2] | 0),
                        (zoomArgs[3] | 0), (zoomArgs[4] | 0)];
              }
            } else {
              console.error('PDFLinkService_setHash: \'' + zoomArg +
                            '\' is not a valid zoom value.');
            }
          }
        }
        if (dest) {
          this.pdfViewer.scrollPageIntoView(pageNumber || this.page, dest);
        } else if (pageNumber) {
          this.page = pageNumber; // simple page
        }
        if ('pagemode' in params) {
          if (params.pagemode === 'thumbs' || params.pagemode === 'bookmarks' ||
              params.pagemode === 'attachments') {
            this.switchSidebarView((params.pagemode === 'bookmarks' ?
                                   'outline' : params.pagemode), true);
          } else if (params.pagemode === 'none' && this.sidebarOpen) {
            document.getElementById('sidebarToggle').click();
          }
        }
      } else if (/^\d+$/.test(hash)) { // page number
        this.page = hash;
      } else { // named destination
        if (this.pdfHistory) {
          this.pdfHistory.updateNextHashParam(unescape(hash));
        }
        this.navigateTo(unescape(hash));
      }
    },

    /**
     * @param {string} action
     */
    executeNamedAction: function PDFLinkService_executeNamedAction(action) {
      // See PDF reference, table 8.45 - Named action
      switch (action) {
        case 'GoBack':
          if (this.pdfHistory) {
            this.pdfHistory.back();
          }
          break;

        case 'GoForward':
          if (this.pdfHistory) {
            this.pdfHistory.forward();
          }
          break;

        case 'NextPage':
          this.page++;
          break;

        case 'PrevPage':
          this.page--;
          break;

        case 'LastPage':
          this.page = this.pagesCount;
          break;

        case 'FirstPage':
          this.page = 1;
          break;

        default:
          break; // No action according to spec
      }

      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('namedaction', true, true, {
        action: action
      });
      this.pdfViewer.container.dispatchEvent(event);
    },

    /**
     * @param {number} pageNum - page number.
     * @param {Object} pageRef - reference to the page.
     */
    cachePageRef: function PDFLinkService_cachePageRef(pageNum, pageRef) {
      var refStr = pageRef.num + ' ' + pageRef.gen + ' R';
      this._pagesRefCache[refStr] = pageNum;
    }
  };

  return PDFLinkService;
})();


var PDFHistory = (function () {
  function PDFHistory(options) {
    this.linkService = options.linkService;

    this.initialized = false;
    this.initialDestination = null;
    this.initialBookmark = null;
  }

  PDFHistory.prototype = {
    /**
     * @param {string} fingerprint
     * @param {IPDFLinkService} linkService
     */
    initialize: function pdfHistoryInitialize(fingerprint) {
      this.initialized = true;
      this.reInitialized = false;
      this.allowHashChange = true;
      this.historyUnlocked = true;
      this.isViewerInPresentationMode = false;

      this.previousHash = window.location.hash.substring(1);
      this.currentBookmark = '';
      this.currentPage = 0;
      this.updatePreviousBookmark = false;
      this.previousBookmark = '';
      this.previousPage = 0;
      this.nextHashParam = '';

      this.fingerprint = fingerprint;
      this.currentUid = this.uid = 0;
      this.current = {};

      var state = window.history.state;
      if (this._isStateObjectDefined(state)) {
        // This corresponds to navigating back to the document
        // from another page in the browser history.
        if (state.target.dest) {
          this.initialDestination = state.target.dest;
        } else {
          this.initialBookmark = state.target.hash;
        }
        this.currentUid = state.uid;
        this.uid = state.uid + 1;
        this.current = state.target;
      } else {
        // This corresponds to the loading of a new document.
        if (state && state.fingerprint &&
          this.fingerprint !== state.fingerprint) {
          // Reinitialize the browsing history when a new document
          // is opened in the web viewer.
          this.reInitialized = true;
        }
        this._pushOrReplaceState({fingerprint: this.fingerprint}, true);
      }

      var self = this;
      window.addEventListener('popstate', function pdfHistoryPopstate(evt) {
        evt.preventDefault();
        evt.stopPropagation();

        if (!self.historyUnlocked) {
          return;
        }
        if (evt.state) {
          // Move back/forward in the history.
          self._goTo(evt.state);
        } else {
          // Handle the user modifying the hash of a loaded document.
          self.previousHash = window.location.hash.substring(1);

          // If the history is empty when the hash changes,
          // update the previous entry in the browser history.
          if (self.uid === 0) {
            var previousParams = (self.previousHash && self.currentBookmark &&
            self.previousHash !== self.currentBookmark) ?
            {hash: self.currentBookmark, page: self.currentPage} :
            {page: 1};
            self.historyUnlocked = false;
            self.allowHashChange = false;
            window.history.back();
            self._pushToHistory(previousParams, false, true);
            window.history.forward();
            self.historyUnlocked = true;
          }
          self._pushToHistory({hash: self.previousHash}, false, true);
          self._updatePreviousBookmark();
        }
      }, false);

      function pdfHistoryBeforeUnload() {
        var previousParams = self._getPreviousParams(null, true);
        if (previousParams) {
          var replacePrevious = (!self.current.dest &&
          self.current.hash !== self.previousHash);
          self._pushToHistory(previousParams, false, replacePrevious);
          self._updatePreviousBookmark();
        }
        // Remove the event listener when navigating away from the document,
        // since 'beforeunload' prevents Firefox from caching the document.
        window.removeEventListener('beforeunload', pdfHistoryBeforeUnload,
                                   false);
      }

      window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);

      window.addEventListener('pageshow', function pdfHistoryPageShow(evt) {
        // If the entire viewer (including the PDF file) is cached in
        // the browser, we need to reattach the 'beforeunload' event listener
        // since the 'DOMContentLoaded' event is not fired on 'pageshow'.
        window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
      }, false);

      window.addEventListener('presentationmodechanged', function(e) {
        self.isViewerInPresentationMode = !!e.detail.active;
      });
    },

    clearHistoryState: function pdfHistory_clearHistoryState() {
      this._pushOrReplaceState(null, true);
    },

    _isStateObjectDefined: function pdfHistory_isStateObjectDefined(state) {
      return (state && state.uid >= 0 &&
      state.fingerprint && this.fingerprint === state.fingerprint &&
      state.target && state.target.hash) ? true : false;
    },

    _pushOrReplaceState: function pdfHistory_pushOrReplaceState(stateObj,
                                                                replace) {
      if (replace) {
        window.history.replaceState(stateObj, '', document.URL);
      } else {
        window.history.pushState(stateObj, '', document.URL);
      }
    },

    get isHashChangeUnlocked() {
      if (!this.initialized) {
        return true;
      }
      // If the current hash changes when moving back/forward in the history,
      // this will trigger a 'popstate' event *as well* as a 'hashchange' event.
      // Since the hash generally won't correspond to the exact the position
      // stored in the history's state object, triggering the 'hashchange' event
      // can thus corrupt the browser history.
      //
      // When the hash changes during a 'popstate' event, we *only* prevent the
      // first 'hashchange' event and immediately reset allowHashChange.
      // If it is not reset, the user would not be able to change the hash.

      var temp = this.allowHashChange;
      this.allowHashChange = true;
      return temp;
    },

    _updatePreviousBookmark: function pdfHistory_updatePreviousBookmark() {
      if (this.updatePreviousBookmark &&
        this.currentBookmark && this.currentPage) {
        this.previousBookmark = this.currentBookmark;
        this.previousPage = this.currentPage;
        this.updatePreviousBookmark = false;
      }
    },

    updateCurrentBookmark: function pdfHistoryUpdateCurrentBookmark(bookmark,
                                                                    pageNum) {
      if (this.initialized) {
        this.currentBookmark = bookmark.substring(1);
        this.currentPage = pageNum | 0;
        this._updatePreviousBookmark();
      }
    },

    updateNextHashParam: function pdfHistoryUpdateNextHashParam(param) {
      if (this.initialized) {
        this.nextHashParam = param;
      }
    },

    push: function pdfHistoryPush(params, isInitialBookmark) {
      if (!(this.initialized && this.historyUnlocked)) {
        return;
      }
      if (params.dest && !params.hash) {
        params.hash = (this.current.hash && this.current.dest &&
        this.current.dest === params.dest) ?
          this.current.hash :
          this.linkService.getDestinationHash(params.dest).split('#')[1];
      }
      if (params.page) {
        params.page |= 0;
      }
      if (isInitialBookmark) {
        var target = window.history.state.target;
        if (!target) {
          // Invoked when the user specifies an initial bookmark,
          // thus setting initialBookmark, when the document is loaded.
          this._pushToHistory(params, false);
          this.previousHash = window.location.hash.substring(1);
        }
        this.updatePreviousBookmark = this.nextHashParam ? false : true;
        if (target) {
          // If the current document is reloaded,
          // avoid creating duplicate entries in the history.
          this._updatePreviousBookmark();
        }
        return;
      }
      if (this.nextHashParam) {
        if (this.nextHashParam === params.hash) {
          this.nextHashParam = null;
          this.updatePreviousBookmark = true;
          return;
        } else {
          this.nextHashParam = null;
        }
      }

      if (params.hash) {
        if (this.current.hash) {
          if (this.current.hash !== params.hash) {
            this._pushToHistory(params, true);
          } else {
            if (!this.current.page && params.page) {
              this._pushToHistory(params, false, true);
            }
            this.updatePreviousBookmark = true;
          }
        } else {
          this._pushToHistory(params, true);
        }
      } else if (this.current.page && params.page &&
        this.current.page !== params.page) {
        this._pushToHistory(params, true);
      }
    },

    _getPreviousParams: function pdfHistory_getPreviousParams(onlyCheckPage,
                                                              beforeUnload) {
      if (!(this.currentBookmark && this.currentPage)) {
        return null;
      } else if (this.updatePreviousBookmark) {
        this.updatePreviousBookmark = false;
      }
      if (this.uid > 0 && !(this.previousBookmark && this.previousPage)) {
        // Prevent the history from getting stuck in the current state,
        // effectively preventing the user from going back/forward in
        // the history.
        //
        // This happens if the current position in the document didn't change
        // when the history was previously updated. The reasons for this are
        // either:
        // 1. The current zoom value is such that the document does not need to,
        //    or cannot, be scrolled to display the destination.
        // 2. The previous destination is broken, and doesn't actally point to a
        //    position within the document.
        //    (This is either due to a bad PDF generator, or the user making a
        //     mistake when entering a destination in the hash parameters.)
        return null;
      }
      if ((!this.current.dest && !onlyCheckPage) || beforeUnload) {
        if (this.previousBookmark === this.currentBookmark) {
          return null;
        }
      } else if (this.current.page || onlyCheckPage) {
        if (this.previousPage === this.currentPage) {
          return null;
        }
      } else {
        return null;
      }
      var params = {hash: this.currentBookmark, page: this.currentPage};
      if (this.isViewerInPresentationMode) {
        params.hash = null;
      }
      return params;
    },

    _stateObj: function pdfHistory_stateObj(params) {
      return {fingerprint: this.fingerprint, uid: this.uid, target: params};
    },

    _pushToHistory: function pdfHistory_pushToHistory(params,
                                                      addPrevious, overwrite) {
      if (!this.initialized) {
        return;
      }
      if (!params.hash && params.page) {
        params.hash = ('page=' + params.page);
      }
      if (addPrevious && !overwrite) {
        var previousParams = this._getPreviousParams();
        if (previousParams) {
          var replacePrevious = (!this.current.dest &&
          this.current.hash !== this.previousHash);
          this._pushToHistory(previousParams, false, replacePrevious);
        }
      }
      this._pushOrReplaceState(this._stateObj(params),
        (overwrite || this.uid === 0));
      this.currentUid = this.uid++;
      this.current = params;
      this.updatePreviousBookmark = true;
    },

    _goTo: function pdfHistory_goTo(state) {
      if (!(this.initialized && this.historyUnlocked &&
        this._isStateObjectDefined(state))) {
        return;
      }
      if (!this.reInitialized && state.uid < this.currentUid) {
        var previousParams = this._getPreviousParams(true);
        if (previousParams) {
          this._pushToHistory(this.current, false);
          this._pushToHistory(previousParams, false);
          this.currentUid = state.uid;
          window.history.back();
          return;
        }
      }
      this.historyUnlocked = false;

      if (state.target.dest) {
        this.linkService.navigateTo(state.target.dest);
      } else {
        this.linkService.setHash(state.target.hash);
      }
      this.currentUid = state.uid;
      if (state.uid > this.uid) {
        this.uid = state.uid;
      }
      this.current = state.target;
      this.updatePreviousBookmark = true;

      var currentHash = window.location.hash.substring(1);
      if (this.previousHash !== currentHash) {
        this.allowHashChange = false;
      }
      this.previousHash = currentHash;

      this.historyUnlocked = true;
    },

    back: function pdfHistoryBack() {
      this.go(-1);
    },

    forward: function pdfHistoryForward() {
      this.go(1);
    },

    go: function pdfHistoryGo(direction) {
      if (this.initialized && this.historyUnlocked) {
        var state = window.history.state;
        if (direction === -1 && state && state.uid > 0) {
          window.history.back();
        } else if (direction === 1 && state && state.uid < (this.uid - 1)) {
          window.history.forward();
        }
      }
    }
  };

  return PDFHistory;
})();


var SecondaryToolbar = {
  opened: false,
  previousContainerHeight: null,
  newContainerHeight: null,

  initialize: function secondaryToolbarInitialize(options) {
    this.toolbar = options.toolbar;
    this.buttonContainer = this.toolbar.firstElementChild;

    // Define the toolbar buttons.
    this.toggleButton = options.toggleButton;
    this.presentationModeButton = options.presentationModeButton;
    this.openFile = options.openFile;
    this.print = options.print;
    this.download = options.download;
    this.viewBookmark = options.viewBookmark;
    this.firstPage = options.firstPage;
    this.lastPage = options.lastPage;
    this.pageRotateCw = options.pageRotateCw;
    this.pageRotateCcw = options.pageRotateCcw;
    this.documentPropertiesButton = options.documentPropertiesButton;

    // Attach the event listeners.
    var elements = [
      // Button to toggle the visibility of the secondary toolbar:
      { element: this.toggleButton, handler: this.toggle },
      // All items within the secondary toolbar
      // (except for toggleHandTool, hand_tool.js is responsible for it):
      { element: this.presentationModeButton,
        handler: this.presentationModeClick },
      { element: this.openFile, handler: this.openFileClick },
      { element: this.print, handler: this.printClick },
      { element: this.download, handler: this.downloadClick },
      { element: this.viewBookmark, handler: this.viewBookmarkClick },
      { element: this.firstPage, handler: this.firstPageClick },
      { element: this.lastPage, handler: this.lastPageClick },
      { element: this.pageRotateCw, handler: this.pageRotateCwClick },
      { element: this.pageRotateCcw, handler: this.pageRotateCcwClick },
      { element: this.documentPropertiesButton,
        handler: this.documentPropertiesClick }
    ];

    for (var item in elements) {
      var element = elements[item].element;
      if (element) {
        element.addEventListener('click', elements[item].handler.bind(this));
      }
    }
  },

  // Event handling functions.
  presentationModeClick: function secondaryToolbarPresentationModeClick(evt) {
    PDFViewerApplication.requestPresentationMode();
    this.close();
  },

  openFileClick: function secondaryToolbarOpenFileClick(evt) {
    document.getElementById('fileInput').click();
    this.close();
  },

  printClick: function secondaryToolbarPrintClick(evt) {
    window.print();
    this.close();
  },

  downloadClick: function secondaryToolbarDownloadClick(evt) {
    PDFViewerApplication.download();
    this.close();
  },

  viewBookmarkClick: function secondaryToolbarViewBookmarkClick(evt) {
    this.close();
  },

  firstPageClick: function secondaryToolbarFirstPageClick(evt) {
    PDFViewerApplication.page = 1;
    this.close();
  },

  lastPageClick: function secondaryToolbarLastPageClick(evt) {
    if (PDFViewerApplication.pdfDocument) {
      PDFViewerApplication.page = PDFViewerApplication.pagesCount;
    }
    this.close();
  },

  pageRotateCwClick: function secondaryToolbarPageRotateCwClick(evt) {
    PDFViewerApplication.rotatePages(90);
  },

  pageRotateCcwClick: function secondaryToolbarPageRotateCcwClick(evt) {
    PDFViewerApplication.rotatePages(-90);
  },

  documentPropertiesClick: function secondaryToolbarDocumentPropsClick(evt) {
    PDFViewerApplication.pdfDocumentProperties.open();
    this.close();
  },

  // Misc. functions for interacting with the toolbar.
  setMaxHeight: function secondaryToolbarSetMaxHeight(container) {
    if (!container || !this.buttonContainer) {
      return;
    }
    this.newContainerHeight = container.clientHeight;
    if (this.previousContainerHeight === this.newContainerHeight) {
      return;
    }
    this.buttonContainer.setAttribute('style',
      'max-height: ' + (this.newContainerHeight - SCROLLBAR_PADDING) + 'px;');
    this.previousContainerHeight = this.newContainerHeight;
  },

  open: function secondaryToolbarOpen() {
    if (this.opened) {
      return;
    }
    this.opened = true;
    this.toggleButton.classList.add('toggled');
    this.toolbar.classList.remove('hidden');
  },

  close: function secondaryToolbarClose(target) {
    if (!this.opened) {
      return;
    } else if (target && !this.toolbar.contains(target)) {
      return;
    }
    this.opened = false;
    this.toolbar.classList.add('hidden');
    this.toggleButton.classList.remove('toggled');
  },

  toggle: function secondaryToolbarToggle() {
    if (this.opened) {
      this.close();
    } else {
      this.open();
    }
  }
};


var DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500; // in ms
var DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms
var ACTIVE_SELECTOR = 'pdfPresentationMode';
var CONTROLS_SELECTOR = 'pdfPresentationModeControls';

/**
 * @typedef {Object} PDFPresentationModeOptions
 * @property {HTMLDivElement} container - The container for the viewer element.
 * @property {HTMLDivElement} viewer - (optional) The viewer element.
 * @property {PDFThumbnailViewer} pdfThumbnailViewer - (optional) The thumbnail
 *   viewer.
 * @property {Array} contextMenuItems - (optional) The menuitems that are added
 *   to the context menu in Presentation Mode.
 */

/**
 * @class
 */
var PDFPresentationMode = (function PDFPresentationModeClosure() {
  /**
   * @constructs PDFPresentationMode
   * @param {PDFPresentationModeOptions} options
   */
  function PDFPresentationMode(options) {
    this.container = options.container;
    this.viewer = options.viewer || options.container.firstElementChild;
    this.pdfThumbnailViewer = options.pdfThumbnailViewer || null;
    var contextMenuItems = options.contextMenuItems || null;

    this.active = false;
    this.args = null;
    this.contextMenuOpen = false;
    this.mouseScrollTimeStamp = 0;
    this.mouseScrollDelta = 0;

    if (contextMenuItems) {
      for (var i = 0, ii = contextMenuItems.length; i < ii; i++) {
        var item = contextMenuItems[i];
        item.element.addEventListener('click', function (handler) {
          this.contextMenuOpen = false;
          handler();
        }.bind(this, item.handler));
      }
    }
  }

  PDFPresentationMode.prototype = {
    /**
     * Request the browser to enter fullscreen mode.
     * @returns {boolean} Indicating if the request was successful.
     */
    request: function PDFPresentationMode_request() {
      if (this.switchInProgress || this.active ||
          !this.viewer.hasChildNodes()) {
        return false;
      }
      this._addFullscreenChangeListeners();
      this._setSwitchInProgress();
      this._notifyStateChange();

      if (this.container.requestFullscreen) {
        this.container.requestFullscreen();
      } else if (this.container.mozRequestFullScreen) {
        this.container.mozRequestFullScreen();
      } else if (this.container.webkitRequestFullscreen) {
        this.container.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
      } else if (this.container.msRequestFullscreen) {
        this.container.msRequestFullscreen();
      } else {
        return false;
      }

      this.args = {
        page: PDFViewerApplication.page,
        previousScale: PDFViewerApplication.currentScaleValue
      };

      return true;
    },

    /**
     * Switches page when the user scrolls (using a scroll wheel or a touchpad)
     * with large enough motion, to prevent accidental page switches.
     * @param {number} delta - The delta value from the mouse event.
     */
    mouseScroll: function PDFPresentationMode_mouseScroll(delta) {
      if (!this.active) {
        return;
      }
      var MOUSE_SCROLL_COOLDOWN_TIME = 50;
      var PAGE_SWITCH_THRESHOLD = 120;
      var PageSwitchDirection = {
        UP: -1,
        DOWN: 1
      };

      var currentTime = (new Date()).getTime();
      var storedTime = this.mouseScrollTimeStamp;

      // If we've already switched page, avoid accidentally switching again.
      if (currentTime > storedTime &&
          currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME) {
        return;
      }
      // If the scroll direction changed, reset the accumulated scroll delta.
      if ((this.mouseScrollDelta > 0 && delta < 0) ||
          (this.mouseScrollDelta < 0 && delta > 0)) {
        this._resetMouseScrollState();
      }
      this.mouseScrollDelta += delta;

      if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {
        var pageSwitchDirection = (this.mouseScrollDelta > 0) ?
          PageSwitchDirection.UP : PageSwitchDirection.DOWN;
        var page = PDFViewerApplication.page;
        this._resetMouseScrollState();

        // If we're at the first/last page, we don't need to do anything.
        if ((page === 1 && pageSwitchDirection === PageSwitchDirection.UP) ||
            (page === PDFViewerApplication.pagesCount &&
             pageSwitchDirection === PageSwitchDirection.DOWN)) {
          return;
        }
        PDFViewerApplication.page = (page + pageSwitchDirection);
        this.mouseScrollTimeStamp = currentTime;
      }
    },

    get isFullscreen() {
      return !!(document.fullscreenElement ||
                document.mozFullScreen ||
                document.webkitIsFullScreen ||
                document.msFullscreenElement);
    },

    /**
     * @private
     */
    _notifyStateChange: function PDFPresentationMode_notifyStateChange() {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('presentationmodechanged', true, true, {
        active: this.active,
        switchInProgress: !!this.switchInProgress
      });
      window.dispatchEvent(event);
    },

    /**
     * Used to initialize a timeout when requesting Presentation Mode,
     * i.e. when the browser is requested to enter fullscreen mode.
     * This timeout is used to prevent the current page from being scrolled
     * partially, or completely, out of view when entering Presentation Mode.
     * NOTE: This issue seems limited to certain zoom levels (e.g. page-width).
     * @private
     */
    _setSwitchInProgress: function PDFPresentationMode_setSwitchInProgress() {
      if (this.switchInProgress) {
        clearTimeout(this.switchInProgress);
      }
      this.switchInProgress = setTimeout(function switchInProgressTimeout() {
        this._removeFullscreenChangeListeners();
        delete this.switchInProgress;
        this._notifyStateChange();
      }.bind(this), DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS);
    },

    /**
     * @private
     */
    _resetSwitchInProgress:
        function PDFPresentationMode_resetSwitchInProgress() {
      if (this.switchInProgress) {
        clearTimeout(this.switchInProgress);
        delete this.switchInProgress;
      }
    },

    /**
     * @private
     */
    _enter: function PDFPresentationMode_enter() {
      this.active = true;
      this._resetSwitchInProgress();
      this._notifyStateChange();
      this.container.classList.add(ACTIVE_SELECTOR);

      // Ensure that the correct page is scrolled into view when entering
      // Presentation Mode, by waiting until fullscreen mode in enabled.
      setTimeout(function enterPresentationModeTimeout() {
        PDFViewerApplication.page = this.args.page;
        PDFViewerApplication.setScale('page-fit', true);
      }.bind(this), 0);

      this._addWindowListeners();
      this._showControls();
      this.contextMenuOpen = false;
      this.container.setAttribute('contextmenu', 'viewerContextMenu');

      // Text selection is disabled in Presentation Mode, thus it's not possible
      // for the user to deselect text that is selected (e.g. with "Select all")
      // when entering Presentation Mode, hence we remove any active selection.
      window.getSelection().removeAllRanges();
    },

    /**
     * @private
     */
    _exit: function PDFPresentationMode_exit() {
      var page = PDFViewerApplication.page;
      this.container.classList.remove(ACTIVE_SELECTOR);

      // Ensure that the correct page is scrolled into view when exiting
      // Presentation Mode, by waiting until fullscreen mode is disabled.
      setTimeout(function exitPresentationModeTimeout() {
        this.active = false;
        this._removeFullscreenChangeListeners();
        this._notifyStateChange();

        PDFViewerApplication.setScale(this.args.previousScale, true);
        PDFViewerApplication.page = page;
        this.args = null;
      }.bind(this), 0);

      this._removeWindowListeners();
      this._hideControls();
      this._resetMouseScrollState();
      this.container.removeAttribute('contextmenu');
      this.contextMenuOpen = false;

      if (this.pdfThumbnailViewer) {
        this.pdfThumbnailViewer.ensureThumbnailVisible(page);
      }
    },

    /**
     * @private
     */
    _mouseDown: function PDFPresentationMode_mouseDown(evt) {
      if (this.contextMenuOpen) {
        this.contextMenuOpen = false;
        evt.preventDefault();
        return;
      }
      if (evt.button === 0) {
        // Enable clicking of links in presentation mode. Please note:
        // Only links pointing to destinations in the current PDF document work.
        var isInternalLink = (evt.target.href &&
                              evt.target.classList.contains('internalLink'));
        if (!isInternalLink) {
          // Unless an internal link was clicked, advance one page.
          evt.preventDefault();
          PDFViewerApplication.page += (evt.shiftKey ? -1 : 1);
        }
      }
    },

    /**
     * @private
     */
    _contextMenu: function PDFPresentationMode_contextMenu() {
      this.contextMenuOpen = true;
    },

    /**
     * @private
     */
    _showControls: function PDFPresentationMode_showControls() {
      if (this.controlsTimeout) {
        clearTimeout(this.controlsTimeout);
      } else {
        this.container.classList.add(CONTROLS_SELECTOR);
      }
      this.controlsTimeout = setTimeout(function showControlsTimeout() {
        this.container.classList.remove(CONTROLS_SELECTOR);
        delete this.controlsTimeout;
      }.bind(this), DELAY_BEFORE_HIDING_CONTROLS);
    },

    /**
     * @private
     */
    _hideControls: function PDFPresentationMode_hideControls() {
      if (!this.controlsTimeout) {
        return;
      }
      clearTimeout(this.controlsTimeout);
      this.container.classList.remove(CONTROLS_SELECTOR);
      delete this.controlsTimeout;
    },

    /**
     * Resets the properties used for tracking mouse scrolling events.
     * @private
     */
    _resetMouseScrollState:
        function PDFPresentationMode_resetMouseScrollState() {
      this.mouseScrollTimeStamp = 0;
      this.mouseScrollDelta = 0;
    },

    /**
     * @private
     */
    _addWindowListeners: function PDFPresentationMode_addWindowListeners() {
      this.showControlsBind = this._showControls.bind(this);
      this.mouseDownBind = this._mouseDown.bind(this);
      this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
      this.contextMenuBind = this._contextMenu.bind(this);

      window.addEventListener('mousemove', this.showControlsBind);
      window.addEventListener('mousedown', this.mouseDownBind);
      window.addEventListener('keydown', this.resetMouseScrollStateBind);
      window.addEventListener('contextmenu', this.contextMenuBind);
    },

    /**
     * @private
     */
    _removeWindowListeners:
        function PDFPresentationMode_removeWindowListeners() {
      window.removeEventListener('mousemove', this.showControlsBind);
      window.removeEventListener('mousedown', this.mouseDownBind);
      window.removeEventListener('keydown', this.resetMouseScrollStateBind);
      window.removeEventListener('contextmenu', this.contextMenuBind);

      delete this.showControlsBind;
      delete this.mouseDownBind;
      delete this.resetMouseScrollStateBind;
      delete this.contextMenuBind;
    },

    /**
     * @private
     */
    _fullscreenChange: function PDFPresentationMode_fullscreenChange() {
      if (this.isFullscreen) {
        this._enter();
      } else {
        this._exit();
      }
    },

    /**
     * @private
     */
    _addFullscreenChangeListeners:
        function PDFPresentationMode_addFullscreenChangeListeners() {
      this.fullscreenChangeBind = this._fullscreenChange.bind(this);

      window.addEventListener('fullscreenchange', this.fullscreenChangeBind);
      window.addEventListener('mozfullscreenchange', this.fullscreenChangeBind);
      window.addEventListener('webkitfullscreenchange',
                              this.fullscreenChangeBind);
      window.addEventListener('MSFullscreenChange', this.fullscreenChangeBind);
    },

    /**
     * @private
     */
    _removeFullscreenChangeListeners:
        function PDFPresentationMode_removeFullscreenChangeListeners() {
      window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);
      window.removeEventListener('mozfullscreenchange',
                                 this.fullscreenChangeBind);
      window.removeEventListener('webkitfullscreenchange',
                              this.fullscreenChangeBind);
      window.removeEventListener('MSFullscreenChange',
                                 this.fullscreenChangeBind);

      delete this.fullscreenChangeBind;
    }
  };

  return PDFPresentationMode;
})();


/* Copyright 2013 Rob Wu <gwnRob@gmail.com>
 * https://github.com/Rob--W/grab-to-pan.js
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

var GrabToPan = (function GrabToPanClosure() {
  /**
   * Construct a GrabToPan instance for a given HTML element.
   * @param options.element {Element}
   * @param options.ignoreTarget {function} optional. See `ignoreTarget(node)`
   * @param options.onActiveChanged {function(boolean)} optional. Called
   *  when grab-to-pan is (de)activated. The first argument is a boolean that
   *  shows whether grab-to-pan is activated.
   */
  function GrabToPan(options) {
    this.element = options.element;
    this.document = options.element.ownerDocument;
    if (typeof options.ignoreTarget === 'function') {
      this.ignoreTarget = options.ignoreTarget;
    }
    this.onActiveChanged = options.onActiveChanged;

    // Bind the contexts to ensure that `this` always points to
    // the GrabToPan instance.
    this.activate = this.activate.bind(this);
    this.deactivate = this.deactivate.bind(this);
    this.toggle = this.toggle.bind(this);
    this._onmousedown = this._onmousedown.bind(this);
    this._onmousemove = this._onmousemove.bind(this);
    this._endPan = this._endPan.bind(this);

    // This overlay will be inserted in the document when the mouse moves during
    // a grab operation, to ensure that the cursor has the desired appearance.
    var overlay = this.overlay = document.createElement('div');
    overlay.className = 'grab-to-pan-grabbing';
  }
  GrabToPan.prototype = {
    /**
     * Class name of element which can be grabbed
     */
    CSS_CLASS_GRAB: 'grab-to-pan-grab',

    /**
     * Bind a mousedown event to the element to enable grab-detection.
     */
    activate: function GrabToPan_activate() {
      if (!this.active) {
        this.active = true;
        this.element.addEventListener('mousedown', this._onmousedown, true);
        this.element.classList.add(this.CSS_CLASS_GRAB);
        if (this.onActiveChanged) {
          this.onActiveChanged(true);
        }
      }
    },

    /**
     * Removes all events. Any pending pan session is immediately stopped.
     */
    deactivate: function GrabToPan_deactivate() {
      if (this.active) {
        this.active = false;
        this.element.removeEventListener('mousedown', this._onmousedown, true);
        this._endPan();
        this.element.classList.remove(this.CSS_CLASS_GRAB);
        if (this.onActiveChanged) {
          this.onActiveChanged(false);
        }
      }
    },

    toggle: function GrabToPan_toggle() {
      if (this.active) {
        this.deactivate();
      } else {
        this.activate();
      }
    },

    /**
     * Whether to not pan if the target element is clicked.
     * Override this method to change the default behaviour.
     *
     * @param node {Element} The target of the event
     * @return {boolean} Whether to not react to the click event.
     */
    ignoreTarget: function GrabToPan_ignoreTarget(node) {
      // Use matchesSelector to check whether the clicked element
      // is (a child of) an input element / link
      return node[matchesSelector](
        'a[href], a[href] *, input, textarea, button, button *, select, option'
      );
    },

    /**
     * @private
     */
    _onmousedown: function GrabToPan__onmousedown(event) {
      if (event.button !== 0 || this.ignoreTarget(event.target)) {
        return;
      }
      if (event.originalTarget) {
        try {
          /* jshint expr:true */
          event.originalTarget.tagName;
        } catch (e) {
          // Mozilla-specific: element is a scrollbar (XUL element)
          return;
        }
      }

      this.scrollLeftStart = this.element.scrollLeft;
      this.scrollTopStart = this.element.scrollTop;
      this.clientXStart = event.clientX;
      this.clientYStart = event.clientY;
      this.document.addEventListener('mousemove', this._onmousemove, true);
      this.document.addEventListener('mouseup', this._endPan, true);
      // When a scroll event occurs before a mousemove, assume that the user
      // dragged a scrollbar (necessary for Opera Presto, Safari and IE)
      // (not needed for Chrome/Firefox)
      this.element.addEventListener('scroll', this._endPan, true);
      event.preventDefault();
      event.stopPropagation();
      this.document.documentElement.classList.add(this.CSS_CLASS_GRABBING);

      var focusedElement = document.activeElement;
      if (focusedElement && !focusedElement.contains(event.target)) {
        focusedElement.blur();
      }
    },

    /**
     * @private
     */
    _onmousemove: function GrabToPan__onmousemove(event) {
      this.element.removeEventListener('scroll', this._endPan, true);
      if (isLeftMouseReleased(event)) {
        this._endPan();
        return;
      }
      var xDiff = event.clientX - this.clientXStart;
      var yDiff = event.clientY - this.clientYStart;
      this.element.scrollTop = this.scrollTopStart - yDiff;
      this.element.scrollLeft = this.scrollLeftStart - xDiff;
      if (!this.overlay.parentNode) {
        document.body.appendChild(this.overlay);
      }
    },

    /**
     * @private
     */
    _endPan: function GrabToPan__endPan() {
      this.element.removeEventListener('scroll', this._endPan, true);
      this.document.removeEventListener('mousemove', this._onmousemove, true);
      this.document.removeEventListener('mouseup', this._endPan, true);
      if (this.overlay.parentNode) {
        this.overlay.parentNode.removeChild(this.overlay);
      }
    }
  };

  // Get the correct (vendor-prefixed) name of the matches method.
  var matchesSelector;
  ['webkitM', 'mozM', 'msM', 'oM', 'm'].some(function(prefix) {
    var name = prefix + 'atches';
    if (name in document.documentElement) {
      matchesSelector = name;
    }
    name += 'Selector';
    if (name in document.documentElement) {
      matchesSelector = name;
    }
    return matchesSelector; // If found, then truthy, and [].some() ends.
  });

  // Browser sniffing because it's impossible to feature-detect
  // whether event.which for onmousemove is reliable
  var isNotIEorIsIE10plus = !document.documentMode || document.documentMode > 9;
  var chrome = window.chrome;
  var isChrome15OrOpera15plus = chrome && (chrome.webstore || chrome.app);
  //                                       ^ Chrome 15+       ^ Opera 15+
  var isSafari6plus = /Apple/.test(navigator.vendor) &&
                      /Version\/([6-9]\d*|[1-5]\d+)/.test(navigator.userAgent);

  /**
   * Whether the left mouse is not pressed.
   * @param event {MouseEvent}
   * @return {boolean} True if the left mouse button is not pressed.
   *                   False if unsure or if the left mouse button is pressed.
   */
  function isLeftMouseReleased(event) {
    if ('buttons' in event && isNotIEorIsIE10plus) {
      // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-buttons
      // Firefox 15+
      // Internet Explorer 10+
      return !(event.buttons | 1);
    }
    if (isChrome15OrOpera15plus || isSafari6plus) {
      // Chrome 14+
      // Opera 15+
      // Safari 6.0+
      return event.which === 0;
    }
  }

  return GrabToPan;
})();

var HandTool = {
  initialize: function handToolInitialize(options) {
    var toggleHandTool = options.toggleHandTool;
    this.handTool = new GrabToPan({
      element: options.container,
      onActiveChanged: function(isActive) {
        if (!toggleHandTool) {
          return;
        }
        if (isActive) {
          toggleHandTool.title =
            mozL10n.get('hand_tool_disable.title', null, 'Disable hand tool');
          toggleHandTool.firstElementChild.textContent =
            mozL10n.get('hand_tool_disable_label', null, 'Disable hand tool');
        } else {
          toggleHandTool.title =
            mozL10n.get('hand_tool_enable.title', null, 'Enable hand tool');
          toggleHandTool.firstElementChild.textContent =
            mozL10n.get('hand_tool_enable_label', null, 'Enable hand tool');
        }
      }
    });
    if (toggleHandTool) {
      toggleHandTool.addEventListener('click', this.toggle.bind(this), false);

      window.addEventListener('localized', function (evt) {
        Preferences.get('enableHandToolOnLoad').then(function resolved(value) {
          if (value) {
            this.handTool.activate();
          }
        }.bind(this), function rejected(reason) {});
      }.bind(this));

      window.addEventListener('presentationmodechanged', function (evt) {
        if (evt.detail.switchInProgress) {
          return;
        }
        if (evt.detail.active) {
          this.enterPresentationMode();
        } else {
          this.exitPresentationMode();
        }
      }.bind(this));
    }
  },

  toggle: function handToolToggle() {
    this.handTool.toggle();
    SecondaryToolbar.close();
  },

  enterPresentationMode: function handToolEnterPresentationMode() {
    if (this.handTool.active) {
      this.wasActive = true;
      this.handTool.deactivate();
    }
  },

  exitPresentationMode: function handToolExitPresentationMode() {
    if (this.wasActive) {
      this.wasActive = null;
      this.handTool.activate();
    }
  }
};


var OverlayManager = {
  overlays: {},
  active: null,

  /**
   * @param {string} name The name of the overlay that is registered. This must
   *                 be equal to the ID of the overlay's DOM element.
   * @param {function} callerCloseMethod (optional) The method that, if present,
   *                   will call OverlayManager.close from the Object
   *                   registering the overlay. Access to this method is
   *                   necessary in order to run cleanup code when e.g.
   *                   the overlay is force closed. The default is null.
   * @param {boolean} canForceClose (optional) Indicates if opening the overlay
   *                  will close an active overlay. The default is false.
   * @returns {Promise} A promise that is resolved when the overlay has been
   *                    registered.
   */
  register: function overlayManagerRegister(name,
                                            callerCloseMethod, canForceClose) {
    return new Promise(function (resolve) {
      var element, container;
      if (!name || !(element = document.getElementById(name)) ||
          !(container = element.parentNode)) {
        throw new Error('Not enough parameters.');
      } else if (this.overlays[name]) {
        throw new Error('The overlay is already registered.');
      }
      this.overlays[name] = { element: element,
                              container: container,
                              callerCloseMethod: (callerCloseMethod || null),
                              canForceClose: (canForceClose || false) };
      resolve();
    }.bind(this));
  },

  /**
   * @param {string} name The name of the overlay that is unregistered.
   * @returns {Promise} A promise that is resolved when the overlay has been
   *                    unregistered.
   */
  unregister: function overlayManagerUnregister(name) {
    return new Promise(function (resolve) {
      if (!this.overlays[name]) {
        throw new Error('The overlay does not exist.');
      } else if (this.active === name) {
        throw new Error('The overlay cannot be removed while it is active.');
      }
      delete this.overlays[name];

      resolve();
    }.bind(this));
  },

  /**
   * @param {string} name The name of the overlay that should be opened.
   * @returns {Promise} A promise that is resolved when the overlay has been
   *                    opened.
   */
  open: function overlayManagerOpen(name) {
    return new Promise(function (resolve) {
      if (!this.overlays[name]) {
        throw new Error('The overlay does not exist.');
      } else if (this.active) {
        if (this.overlays[name].canForceClose) {
          this._closeThroughCaller();
        } else if (this.active === name) {
          throw new Error('The overlay is already active.');
        } else {
          throw new Error('Another overlay is currently active.');
        }
      }
      this.active = name;
      this.overlays[this.active].element.classList.remove('hidden');
      this.overlays[this.active].container.classList.remove('hidden');

      window.addEventListener('keydown', this._keyDown);
      resolve();
    }.bind(this));
  },

  /**
   * @param {string} name The name of the overlay that should be closed.
   * @returns {Promise} A promise that is resolved when the overlay has been
   *                    closed.
   */
  close: function overlayManagerClose(name) {
    return new Promise(function (resolve) {
      if (!this.overlays[name]) {
        throw new Error('The overlay does not exist.');
      } else if (!this.active) {
        throw new Error('The overlay is currently not active.');
      } else if (this.active !== name) {
        throw new Error('Another overlay is currently active.');
      }
      this.overlays[this.active].container.classList.add('hidden');
      this.overlays[this.active].element.classList.add('hidden');
      this.active = null;

      window.removeEventListener('keydown', this._keyDown);
      resolve();
    }.bind(this));
  },

  /**
   * @private
   */
  _keyDown: function overlayManager_keyDown(evt) {
    var self = OverlayManager;
    if (self.active && evt.keyCode === 27) { // Esc key.
      self._closeThroughCaller();
      evt.preventDefault();
    }
  },

  /**
   * @private
   */
  _closeThroughCaller: function overlayManager_closeThroughCaller() {
    if (this.overlays[this.active].callerCloseMethod) {
      this.overlays[this.active].callerCloseMethod();
    }
    if (this.active) {
      this.close(this.active);
    }
  }
};


var PasswordPrompt = {
  overlayName: null,
  updatePassword: null,
  reason: null,
  passwordField: null,
  passwordText: null,
  passwordSubmit: null,
  passwordCancel: null,

  initialize: function secondaryToolbarInitialize(options) {
    this.overlayName = options.overlayName;
    this.passwordField = options.passwordField;
    this.passwordText = options.passwordText;
    this.passwordSubmit = options.passwordSubmit;
    this.passwordCancel = options.passwordCancel;

    // Attach the event listeners.
    this.passwordSubmit.addEventListener('click',
      this.verifyPassword.bind(this));

    this.passwordCancel.addEventListener('click', this.close.bind(this));

    this.passwordField.addEventListener('keydown', function (e) {
      if (e.keyCode === 13) { // Enter key
        this.verifyPassword();
      }
    }.bind(this));

    OverlayManager.register(this.overlayName, this.close.bind(this), true);
  },

  open: function passwordPromptOpen() {
    OverlayManager.open(this.overlayName).then(function () {
      this.passwordField.focus();

      var promptString = mozL10n.get('password_label', null,
        'Enter the password to open this PDF file.');

      if (this.reason === PDFJS.PasswordResponses.INCORRECT_PASSWORD) {
        promptString = mozL10n.get('password_invalid', null,
          'Invalid password. Please try again.');
      }

      this.passwordText.textContent = promptString;
    }.bind(this));
  },

  close: function passwordPromptClose() {
    OverlayManager.close(this.overlayName).then(function () {
      this.passwordField.value = '';
    }.bind(this));
  },

  verifyPassword: function passwordPromptVerifyPassword() {
    var password = this.passwordField.value;
    if (password && password.length > 0) {
      this.close();
      return this.updatePassword(password);
    }
  }
};


/**
 * @typedef {Object} PDFDocumentPropertiesOptions
 * @property {string} overlayName - Name/identifier for the overlay.
 * @property {Object} fields - Names and elements of the overlay's fields.
 * @property {HTMLButtonElement} closeButton - Button for closing the overlay.
 */

/**
 * @class
 */
var PDFDocumentProperties = (function PDFDocumentPropertiesClosure() {
  /**
   * @constructs PDFDocumentProperties
   * @param {PDFDocumentPropertiesOptions} options
   */
  function PDFDocumentProperties(options) {
    this.fields = options.fields;
    this.overlayName = options.overlayName;

    this.rawFileSize = 0;
    this.url = null;
    this.pdfDocument = null;

    // Bind the event listener for the Close button.
    if (options.closeButton) {
      options.closeButton.addEventListener('click', this.close.bind(this));
    }

    this.dataAvailablePromise = new Promise(function (resolve) {
      this.resolveDataAvailable = resolve;
    }.bind(this));

    OverlayManager.register(this.overlayName, this.close.bind(this));
  }

  PDFDocumentProperties.prototype = {
    /**
     * Open the document properties overlay.
     */
    open: function PDFDocumentProperties_open() {
      Promise.all([OverlayManager.open(this.overlayName),
                   this.dataAvailablePromise]).then(function () {
        this._getProperties();
      }.bind(this));
    },

    /**
     * Close the document properties overlay.
     */
    close: function PDFDocumentProperties_close() {
      OverlayManager.close(this.overlayName);
    },

    /**
     * Set the file size of the PDF document. This method is used to
     * update the file size in the document properties overlay once it
     * is known so we do not have to wait until the entire file is loaded.
     *
     * @param {number} fileSize - The file size of the PDF document.
     */
    setFileSize: function PDFDocumentProperties_setFileSize(fileSize) {
      if (fileSize > 0) {
        this.rawFileSize = fileSize;
      }
    },

    /**
     * Set a reference to the PDF document and the URL in order
     * to populate the overlay fields with the document properties.
     * Note that the overlay will contain no information if this method
     * is not called.
     *
     * @param {Object} pdfDocument - A reference to the PDF document.
     * @param {string} url - The URL of the document.
     */
    setDocumentAndUrl:
        function PDFDocumentProperties_setDocumentAndUrl(pdfDocument, url) {
      this.pdfDocument = pdfDocument;
      this.url = url;
      this.resolveDataAvailable();
    },

    /**
     * @private
     */
    _getProperties: function PDFDocumentProperties_getProperties() {
      if (!OverlayManager.active) {
        // If the dialog was closed before dataAvailablePromise was resolved,
        // don't bother updating the properties.
        return;
      }
      // Get the file size (if it hasn't already been set).
      this.pdfDocument.getDownloadInfo().then(function(data) {
        if (data.length === this.rawFileSize) {
          return;
        }
        this.setFileSize(data.length);
        this._updateUI(this.fields['fileSize'], this._parseFileSize());
      }.bind(this));

      // Get the document properties.
      this.pdfDocument.getMetadata().then(function(data) {
        var content = {
          'fileName': getPDFFileNameFromURL(this.url),
          'fileSize': this._parseFileSize(),
          'title': data.info.Title,
          'author': data.info.Author,
          'subject': data.info.Subject,
          'keywords': data.info.Keywords,
          'creationDate': this._parseDate(data.info.CreationDate),
          'modificationDate': this._parseDate(data.info.ModDate),
          'creator': data.info.Creator,
          'producer': data.info.Producer,
          'version': data.info.PDFFormatVersion,
          'pageCount': this.pdfDocument.numPages
        };

        // Show the properties in the dialog.
        for (var identifier in content) {
          this._updateUI(this.fields[identifier], content[identifier]);
        }
      }.bind(this));
    },

    /**
     * @private
     */
    _updateUI: function PDFDocumentProperties_updateUI(field, content) {
      if (field && content !== undefined && content !== '') {
        field.textContent = content;
      }
    },

    /**
     * @private
     */
    _parseFileSize: function PDFDocumentProperties_parseFileSize() {
      var fileSize = this.rawFileSize, kb = fileSize / 1024;
      if (!kb) {
        return;
      } else if (kb < 1024) {
        return mozL10n.get('document_properties_kb', {
          size_kb: (+kb.toPrecision(3)).toLocaleString(),
          size_b: fileSize.toLocaleString()
        }, '{{size_kb}} KB ({{size_b}} bytes)');
      } else {
        return mozL10n.get('document_properties_mb', {
          size_mb: (+(kb / 1024).toPrecision(3)).toLocaleString(),
          size_b: fileSize.toLocaleString()
        }, '{{size_mb}} MB ({{size_b}} bytes)');
      }
    },

    /**
     * @private
     */
    _parseDate: function PDFDocumentProperties_parseDate(inputDate) {
      // This is implemented according to the PDF specification, but note that
      // Adobe Reader doesn't handle changing the date to universal time
      // and doesn't use the user's time zone (they're effectively ignoring
      // the HH' and mm' parts of the date string).
      var dateToParse = inputDate;
      if (dateToParse === undefined) {
        return '';
      }

      // Remove the D: prefix if it is available.
      if (dateToParse.substring(0,2) === 'D:') {
        dateToParse = dateToParse.substring(2);
      }

      // Get all elements from the PDF date string.
      // JavaScript's Date object expects the month to be between
      // 0 and 11 instead of 1 and 12, so we're correcting for this.
      var year = parseInt(dateToParse.substring(0,4), 10);
      var month = parseInt(dateToParse.substring(4,6), 10) - 1;
      var day = parseInt(dateToParse.substring(6,8), 10);
      var hours = parseInt(dateToParse.substring(8,10), 10);
      var minutes = parseInt(dateToParse.substring(10,12), 10);
      var seconds = parseInt(dateToParse.substring(12,14), 10);
      var utRel = dateToParse.substring(14,15);
      var offsetHours = parseInt(dateToParse.substring(15,17), 10);
      var offsetMinutes = parseInt(dateToParse.substring(18,20), 10);

      // As per spec, utRel = 'Z' means equal to universal time.
      // The other cases ('-' and '+') have to be handled here.
      if (utRel === '-') {
        hours += offsetHours;
        minutes += offsetMinutes;
      } else if (utRel === '+') {
        hours -= offsetHours;
        minutes -= offsetMinutes;
      }

      // Return the new date format from the user's locale.
      var date = new Date(Date.UTC(year, month, day, hours, minutes, seconds));
      var dateString = date.toLocaleDateString();
      var timeString = date.toLocaleTimeString();
      return mozL10n.get('document_properties_date_string',
                         {date: dateString, time: timeString},
                         '{{date}}, {{time}}');
    }
  };

  return PDFDocumentProperties;
})();


var PresentationModeState = {
  UNKNOWN: 0,
  NORMAL: 1,
  CHANGING: 2,
  FULLSCREEN: 3,
};

var IGNORE_CURRENT_POSITION_ON_ZOOM = false;
var DEFAULT_CACHE_SIZE = 10;


var CLEANUP_TIMEOUT = 30000;

var RenderingStates = {
  INITIAL: 0,
  RUNNING: 1,
  PAUSED: 2,
  FINISHED: 3
};

/**
 * Controls rendering of the views for pages and thumbnails.
 * @class
 */
var PDFRenderingQueue = (function PDFRenderingQueueClosure() {
  /**
   * @constructs
   */
  function PDFRenderingQueue() {
    this.pdfViewer = null;
    this.pdfThumbnailViewer = null;
    this.onIdle = null;

    this.highestPriorityPage = null;
    this.idleTimeout = null;
    this.printing = false;
    this.isThumbnailViewEnabled = false;
  }

  PDFRenderingQueue.prototype = /** @lends PDFRenderingQueue.prototype */ {
    /**
     * @param {PDFViewer} pdfViewer
     */
    setViewer: function PDFRenderingQueue_setViewer(pdfViewer) {
      this.pdfViewer = pdfViewer;
    },

    /**
     * @param {PDFThumbnailViewer} pdfThumbnailViewer
     */
    setThumbnailViewer:
        function PDFRenderingQueue_setThumbnailViewer(pdfThumbnailViewer) {
      this.pdfThumbnailViewer = pdfThumbnailViewer;
    },

    /**
     * @param {IRenderableView} view
     * @returns {boolean}
     */
    isHighestPriority: function PDFRenderingQueue_isHighestPriority(view) {
      return this.highestPriorityPage === view.renderingId;
    },

    renderHighestPriority: function
        PDFRenderingQueue_renderHighestPriority(currentlyVisiblePages) {
      if (this.idleTimeout) {
        clearTimeout(this.idleTimeout);
        this.idleTimeout = null;
      }

      // Pages have a higher priority than thumbnails, so check them first.
      if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {
        return;
      }
      // No pages needed rendering so check thumbnails.
      if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {
        if (this.pdfThumbnailViewer.forceRendering()) {
          return;
        }
      }

      if (this.printing) {
        // If printing is currently ongoing do not reschedule cleanup.
        return;
      }

      if (this.onIdle) {
        this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);
      }
    },

    getHighestPriority: function
        PDFRenderingQueue_getHighestPriority(visible, views, scrolledDown) {
      // The state has changed figure out which page has the highest priority to
      // render next (if any).
      // Priority:
      // 1 visible pages
      // 2 if last scrolled down page after the visible pages
      // 2 if last scrolled up page before the visible pages
      var visibleViews = visible.views;

      var numVisible = visibleViews.length;
      if (numVisible === 0) {
        return false;
      }
      for (var i = 0; i < numVisible; ++i) {
        var view = visibleViews[i].view;
        if (!this.isViewFinished(view)) {
          return view;
        }
      }

      // All the visible views have rendered, try to render next/previous pages.
      if (scrolledDown) {
        var nextPageIndex = visible.last.id;
        // ID's start at 1 so no need to add 1.
        if (views[nextPageIndex] &&
            !this.isViewFinished(views[nextPageIndex])) {
          return views[nextPageIndex];
        }
      } else {
        var previousPageIndex = visible.first.id - 2;
        if (views[previousPageIndex] &&
          !this.isViewFinished(views[previousPageIndex])) {
          return views[previousPageIndex];
        }
      }
      // Everything that needs to be rendered has been.
      return null;
    },

    /**
     * @param {IRenderableView} view
     * @returns {boolean}
     */
    isViewFinished: function PDFRenderingQueue_isViewFinished(view) {
      return view.renderingState === RenderingStates.FINISHED;
    },

    /**
     * Render a page or thumbnail view. This calls the appropriate function
     * based on the views state. If the view is already rendered it will return
     * false.
     * @param {IRenderableView} view
     */
    renderView: function PDFRenderingQueue_renderView(view) {
      var state = view.renderingState;
      switch (state) {
        case RenderingStates.FINISHED:
          return false;
        case RenderingStates.PAUSED:
          this.highestPriorityPage = view.renderingId;
          view.resume();
          break;
        case RenderingStates.RUNNING:
          this.highestPriorityPage = view.renderingId;
          break;
        case RenderingStates.INITIAL:
          this.highestPriorityPage = view.renderingId;
          var continueRendering = function () {
            this.renderHighestPriority();
          }.bind(this);
          view.draw().then(continueRendering, continueRendering);
          break;
      }
      return true;
    },
  };

  return PDFRenderingQueue;
})();


var TEXT_LAYER_RENDER_DELAY = 200; // ms

/**
 * @typedef {Object} PDFPageViewOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @property {number} id - The page unique ID (normally its number).
 * @property {number} scale - The page scale display.
 * @property {PageViewport} defaultViewport - The page viewport.
 * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
 * @property {IPDFTextLayerFactory} textLayerFactory
 * @property {IPDFAnnotationsLayerFactory} annotationsLayerFactory
 */

/**
 * @class
 * @implements {IRenderableView}
 */
var PDFPageView = (function PDFPageViewClosure() {
  /**
   * @constructs PDFPageView
   * @param {PDFPageViewOptions} options
   */
  function PDFPageView(options) {
    var container = options.container;
    var id = options.id;
    var scale = options.scale;
    var defaultViewport = options.defaultViewport;
    var renderingQueue = options.renderingQueue;
    var textLayerFactory = options.textLayerFactory;
    var annotationsLayerFactory = options.annotationsLayerFactory;

    this.id = id;
    this.renderingId = 'page' + id;

    this.rotation = 0;
    this.scale = scale || 1.0;
    this.viewport = defaultViewport;
    this.pdfPageRotate = defaultViewport.rotation;
    this.hasRestrictedScaling = false;

    this.renderingQueue = renderingQueue;
    this.textLayerFactory = textLayerFactory;
    this.annotationsLayerFactory = annotationsLayerFactory;

    this.renderingState = RenderingStates.INITIAL;
    this.resume = null;

    this.onBeforeDraw = null;
    this.onAfterDraw = null;

    this.textLayer = null;

    this.zoomLayer = null;

    this.annotationLayer = null;

    var div = document.createElement('div');
    div.id = 'pageContainer' + this.id;
    div.className = 'page';
    div.style.width = Math.floor(this.viewport.width) + 'px';
    div.style.height = Math.floor(this.viewport.height) + 'px';
    div.setAttribute('data-page-number', this.id);
    this.div = div;

    container.appendChild(div);
  }

  PDFPageView.prototype = {
    setPdfPage: function PDFPageView_setPdfPage(pdfPage) {
      this.pdfPage = pdfPage;
      this.pdfPageRotate = pdfPage.rotate;
      var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
      this.viewport = pdfPage.getViewport(this.scale * CSS_UNITS,
                                          totalRotation);
      this.stats = pdfPage.stats;
      this.reset();
    },

    destroy: function PDFPageView_destroy() {
      this.zoomLayer = null;
      this.reset();
      if (this.pdfPage) {
        this.pdfPage.destroy();
      }
    },

    reset: function PDFPageView_reset(keepAnnotations) {
      if (this.renderTask) {
        this.renderTask.cancel();
      }
      this.resume = null;
      this.renderingState = RenderingStates.INITIAL;

      var div = this.div;
      div.style.width = Math.floor(this.viewport.width) + 'px';
      div.style.height = Math.floor(this.viewport.height) + 'px';

      var childNodes = div.childNodes;
      var currentZoomLayer = this.zoomLayer || null;
      var currentAnnotationNode = (keepAnnotations && this.annotationLayer &&
                                   this.annotationLayer.div) || null;
      for (var i = childNodes.length - 1; i >= 0; i--) {
        var node = childNodes[i];
        if (currentZoomLayer === node || currentAnnotationNode === node) {
          continue;
        }
        div.removeChild(node);
      }
      div.removeAttribute('data-loaded');

      if (keepAnnotations) {
        if (this.annotationLayer) {
          // Hide annotationLayer until all elements are resized
          // so they are not displayed on the already-resized page
          this.annotationLayer.hide();
        }
      } else {
        this.annotationLayer = null;
      }

      if (this.canvas) {
        // Zeroing the width and height causes Firefox to release graphics
        // resources immediately, which can greatly reduce memory consumption.
        this.canvas.width = 0;
        this.canvas.height = 0;
        delete this.canvas;
      }

      this.loadingIconDiv = document.createElement('div');
      this.loadingIconDiv.className = 'loadingIcon';
      div.appendChild(this.loadingIconDiv);
    },

    update: function PDFPageView_update(scale, rotation) {
      this.scale = scale || this.scale;

      if (typeof rotation !== 'undefined') {
        this.rotation = rotation;
      }

      var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
      this.viewport = this.viewport.clone({
        scale: this.scale * CSS_UNITS,
        rotation: totalRotation
      });

      var isScalingRestricted = false;
      if (this.canvas && PDFJS.maxCanvasPixels > 0) {
        var ctx = this.canvas.getContext('2d');
        var outputScale = getOutputScale(ctx);
        var pixelsInViewport = this.viewport.width * this.viewport.height;
        var maxScale = Math.sqrt(PDFJS.maxCanvasPixels / pixelsInViewport);
        if (((Math.floor(this.viewport.width) * outputScale.sx) | 0) *
            ((Math.floor(this.viewport.height) * outputScale.sy) | 0) >
            PDFJS.maxCanvasPixels) {
          isScalingRestricted = true;
        }
      }

      if (this.canvas &&
          (PDFJS.useOnlyCssZoom ||
            (this.hasRestrictedScaling && isScalingRestricted))) {
        this.cssTransform(this.canvas, true);
        return;
      } else if (this.canvas && !this.zoomLayer) {
        this.zoomLayer = this.canvas.parentNode;
        this.zoomLayer.style.position = 'absolute';
      }
      if (this.zoomLayer) {
        this.cssTransform(this.zoomLayer.firstChild);
      }
      this.reset(true);
    },

    /**
     * Called when moved in the parent's container.
     */
    updatePosition: function PDFPageView_updatePosition() {
      if (this.textLayer) {
        this.textLayer.render(TEXT_LAYER_RENDER_DELAY);
      }
    },

    cssTransform: function PDFPageView_transform(canvas, redrawAnnotations) {
      // Scale canvas, canvas wrapper, and page container.
      var width = this.viewport.width;
      var height = this.viewport.height;
      var div = this.div;
      canvas.style.width = canvas.parentNode.style.width = div.style.width =
        Math.floor(width) + 'px';
      canvas.style.height = canvas.parentNode.style.height = div.style.height =
        Math.floor(height) + 'px';
      // The canvas may have been originally rotated, rotate relative to that.
      var relativeRotation = this.viewport.rotation - canvas._viewport.rotation;
      var absRotation = Math.abs(relativeRotation);
      var scaleX = 1, scaleY = 1;
      if (absRotation === 90 || absRotation === 270) {
        // Scale x and y because of the rotation.
        scaleX = height / width;
        scaleY = width / height;
      }
      var cssTransform = 'rotate(' + relativeRotation + 'deg) ' +
        'scale(' + scaleX + ',' + scaleY + ')';
      CustomStyle.setProp('transform', canvas, cssTransform);

      if (this.textLayer) {
        // Rotating the text layer is more complicated since the divs inside the
        // the text layer are rotated.
        // TODO: This could probably be simplified by drawing the text layer in
        // one orientation then rotating overall.
        var textLayerViewport = this.textLayer.viewport;
        var textRelativeRotation = this.viewport.rotation -
          textLayerViewport.rotation;
        var textAbsRotation = Math.abs(textRelativeRotation);
        var scale = width / textLayerViewport.width;
        if (textAbsRotation === 90 || textAbsRotation === 270) {
          scale = width / textLayerViewport.height;
        }
        var textLayerDiv = this.textLayer.textLayerDiv;
        var transX, transY;
        switch (textAbsRotation) {
          case 0:
            transX = transY = 0;
            break;
          case 90:
            transX = 0;
            transY = '-' + textLayerDiv.style.height;
            break;
          case 180:
            transX = '-' + textLayerDiv.style.width;
            transY = '-' + textLayerDiv.style.height;
            break;
          case 270:
            transX = '-' + textLayerDiv.style.width;
            transY = 0;
            break;
          default:
            console.error('Bad rotation value.');
            break;
        }
        CustomStyle.setProp('transform', textLayerDiv,
            'rotate(' + textAbsRotation + 'deg) ' +
            'scale(' + scale + ', ' + scale + ') ' +
            'translate(' + transX + ', ' + transY + ')');
        CustomStyle.setProp('transformOrigin', textLayerDiv, '0% 0%');
      }

      if (redrawAnnotations && this.annotationLayer) {
        this.annotationLayer.setupAnnotations(this.viewport);
      }
    },

    get width() {
      return this.viewport.width;
    },

    get height() {
      return this.viewport.height;
    },

    getPagePoint: function PDFPageView_getPagePoint(x, y) {
      return this.viewport.convertToPdfPoint(x, y);
    },

    draw: function PDFPageView_draw() {
      if (this.renderingState !== RenderingStates.INITIAL) {
        console.error('Must be in new state before drawing');
      }

      this.renderingState = RenderingStates.RUNNING;

      var pdfPage = this.pdfPage;
      var viewport = this.viewport;
      var div = this.div;
      // Wrap the canvas so if it has a css transform for highdpi the overflow
      // will be hidden in FF.
      var canvasWrapper = document.createElement('div');
      canvasWrapper.style.width = div.style.width;
      canvasWrapper.style.height = div.style.height;
      canvasWrapper.classList.add('canvasWrapper');

      var canvas = document.createElement('canvas');
      canvas.id = 'page' + this.id;
      canvasWrapper.appendChild(canvas);
      if (this.annotationLayer) {
        // annotationLayer needs to stay on top
        div.insertBefore(canvasWrapper, this.annotationLayer.div);
      } else {
        div.appendChild(canvasWrapper);
      }
      this.canvas = canvas;

      var ctx = canvas.getContext('2d');
      var outputScale = getOutputScale(ctx);

      if (PDFJS.useOnlyCssZoom) {
        var actualSizeViewport = viewport.clone({ scale: CSS_UNITS });
        // Use a scale that will make the canvas be the original intended size
        // of the page.
        outputScale.sx *= actualSizeViewport.width / viewport.width;
        outputScale.sy *= actualSizeViewport.height / viewport.height;
        outputScale.scaled = true;
      }

      if (PDFJS.maxCanvasPixels > 0) {
        var pixelsInViewport = viewport.width * viewport.height;
        var maxScale = Math.sqrt(PDFJS.maxCanvasPixels / pixelsInViewport);
        if (outputScale.sx > maxScale || outputScale.sy > maxScale) {
          outputScale.sx = maxScale;
          outputScale.sy = maxScale;
          outputScale.scaled = true;
          this.hasRestrictedScaling = true;
        } else {
          this.hasRestrictedScaling = false;
        }
      }

      canvas.width = (Math.floor(viewport.width) * outputScale.sx) | 0;
      canvas.height = (Math.floor(viewport.height) * outputScale.sy) | 0;
      canvas.style.width = Math.floor(viewport.width) + 'px';
      canvas.style.height = Math.floor(viewport.height) + 'px';
      // Add the viewport so it's known what it was originally drawn with.
      canvas._viewport = viewport;

      var textLayerDiv = null;
      var textLayer = null;
      if (this.textLayerFactory) {
        textLayerDiv = document.createElement('div');
        textLayerDiv.className = 'textLayer';
        textLayerDiv.style.width = canvas.style.width;
        textLayerDiv.style.height = canvas.style.height;
        if (this.annotationLayer) {
          // annotationLayer needs to stay on top
          div.insertBefore(textLayerDiv, this.annotationLayer.div);
        } else {
          div.appendChild(textLayerDiv);
        }

        textLayer = this.textLayerFactory.createTextLayerBuilder(textLayerDiv,
                                                                 this.id - 1,
                                                                 this.viewport);
      }
      this.textLayer = textLayer;

      if (outputScale.scaled) {
        // Used by the mozCurrentTransform polyfill in src/display/canvas.js.
        ctx._transformMatrix = [outputScale.sx, 0, 0, outputScale.sy, 0, 0];
        ctx.scale(outputScale.sx, outputScale.sy);
      }

      var resolveRenderPromise, rejectRenderPromise;
      var promise = new Promise(function (resolve, reject) {
        resolveRenderPromise = resolve;
        rejectRenderPromise = reject;
      });

      // Rendering area

      var self = this;
      function pageViewDrawCallback(error) {
        // The renderTask may have been replaced by a new one, so only remove
        // the reference to the renderTask if it matches the one that is
        // triggering this callback.
        if (renderTask === self.renderTask) {
          self.renderTask = null;
        }

        if (error === 'cancelled') {
          rejectRenderPromise(error);
          return;
        }

        self.renderingState = RenderingStates.FINISHED;

        if (self.loadingIconDiv) {
          div.removeChild(self.loadingIconDiv);
          delete self.loadingIconDiv;
        }

        if (self.zoomLayer) {
          div.removeChild(self.zoomLayer);
          self.zoomLayer = null;
        }

        self.error = error;
        self.stats = pdfPage.stats;
        if (self.onAfterDraw) {
          self.onAfterDraw();
        }
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagerendered', true, true, {
          pageNumber: self.id
        });
        div.dispatchEvent(event);
        // This custom event is deprecated, and will be removed in the future,
        // please use the |pagerendered| event instead.
        var deprecatedEvent = document.createEvent('CustomEvent');
        deprecatedEvent.initCustomEvent('pagerender', true, true, {
          pageNumber: pdfPage.pageNumber
        });
        div.dispatchEvent(deprecatedEvent);

        if (!error) {
          resolveRenderPromise(undefined);
        } else {
          rejectRenderPromise(error);
        }
      }

      var renderContinueCallback = null;
      if (this.renderingQueue) {
        renderContinueCallback = function renderContinueCallback(cont) {
          if (!self.renderingQueue.isHighestPriority(self)) {
            self.renderingState = RenderingStates.PAUSED;
            self.resume = function resumeCallback() {
              self.renderingState = RenderingStates.RUNNING;
              cont();
            };
            return;
          }
          cont();
        };
      }

      var renderContext = {
        canvasContext: ctx,
        viewport: this.viewport,
        // intent: 'default', // === 'display'
        continueCallback: renderContinueCallback
      };
      var renderTask = this.renderTask = this.pdfPage.render(renderContext);

      this.renderTask.promise.then(
        function pdfPageRenderCallback() {
          pageViewDrawCallback(null);
          if (textLayer) {
            self.pdfPage.getTextContent().then(
              function textContentResolved(textContent) {
                textLayer.setTextContent(textContent);
                textLayer.render(TEXT_LAYER_RENDER_DELAY);
              }
            );
          }
        },
        function pdfPageRenderError(error) {
          pageViewDrawCallback(error);
        }
      );

      if (this.annotationsLayerFactory) {
        if (!this.annotationLayer) {
          this.annotationLayer = this.annotationsLayerFactory.
            createAnnotationsLayerBuilder(div, this.pdfPage);
        }
        this.annotationLayer.setupAnnotations(this.viewport);
      }
      div.setAttribute('data-loaded', true);

      if (self.onBeforeDraw) {
        self.onBeforeDraw();
      }
      return promise;
    },

    beforePrint: function PDFPageView_beforePrint() {
      var pdfPage = this.pdfPage;

      var viewport = pdfPage.getViewport(1);
      // Use the same hack we use for high dpi displays for printing to get
      // better output until bug 811002 is fixed in FF.
      var PRINT_OUTPUT_SCALE = 2;
      var canvas = document.createElement('canvas');

      // The logical size of the canvas.
      canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
      canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;

      // The rendered size of the canvas, relative to the size of canvasWrapper.
      canvas.style.width = (PRINT_OUTPUT_SCALE * 100) + '%';
      canvas.style.height = (PRINT_OUTPUT_SCALE * 100) + '%';

      var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
                                (1 / PRINT_OUTPUT_SCALE) + ')';
      CustomStyle.setProp('transform' , canvas, cssScale);
      CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');

      var printContainer = document.getElementById('printContainer');
      var canvasWrapper = document.createElement('div');
      canvasWrapper.style.width = viewport.width + 'pt';
      canvasWrapper.style.height = viewport.height + 'pt';
      canvasWrapper.appendChild(canvas);
      printContainer.appendChild(canvasWrapper);

      canvas.mozPrintCallback = function(obj) {
        var ctx = obj.context;

        ctx.save();
        ctx.fillStyle = 'rgb(255, 255, 255)';
        ctx.fillRect(0, 0, canvas.width, canvas.height);
        ctx.restore();
        // Used by the mozCurrentTransform polyfill in src/display/canvas.js.
        ctx._transformMatrix =
          [PRINT_OUTPUT_SCALE, 0, 0, PRINT_OUTPUT_SCALE, 0, 0];
        ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);

        var renderContext = {
          canvasContext: ctx,
          viewport: viewport,
          intent: 'print'
        };

        pdfPage.render(renderContext).promise.then(function() {
          // Tell the printEngine that rendering this canvas/page has finished.
          obj.done();
        }, function(error) {
          console.error(error);
          // Tell the printEngine that rendering this canvas/page has failed.
          // This will make the print proces stop.
          if ('abort' in obj) {
            obj.abort();
          } else {
            obj.done();
          }
        });
      };
    },
  };

  return PDFPageView;
})();


var MAX_TEXT_DIVS_TO_RENDER = 100000;

var NonWhitespaceRegexp = /\S/;

function isAllWhitespace(str) {
  return !NonWhitespaceRegexp.test(str);
}

/**
 * @typedef {Object} TextLayerBuilderOptions
 * @property {HTMLDivElement} textLayerDiv - The text layer container.
 * @property {number} pageIndex - The page index.
 * @property {PageViewport} viewport - The viewport of the text layer.
 * @property {PDFFindController} findController
 */

/**
 * TextLayerBuilder provides text-selection functionality for the PDF.
 * It does this by creating overlay divs over the PDF text. These divs
 * contain text that matches the PDF text they are overlaying. This object
 * also provides a way to highlight text that is being searched for.
 * @class
 */
var TextLayerBuilder = (function TextLayerBuilderClosure() {
  function TextLayerBuilder(options) {
    this.textLayerDiv = options.textLayerDiv;
    this.renderingDone = false;
    this.divContentDone = false;
    this.pageIdx = options.pageIndex;
    this.pageNumber = this.pageIdx + 1;
    this.matches = [];
    this.viewport = options.viewport;
    this.textDivs = [];
    this.findController = options.findController || null;
  }

  TextLayerBuilder.prototype = {
    _finishRendering: function TextLayerBuilder_finishRendering() {
      this.renderingDone = true;

      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('textlayerrendered', true, true, {
        pageNumber: this.pageNumber
      });
      this.textLayerDiv.dispatchEvent(event);
    },

    renderLayer: function TextLayerBuilder_renderLayer() {
      var textLayerFrag = document.createDocumentFragment();
      var textDivs = this.textDivs;
      var textDivsLength = textDivs.length;
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');

      // No point in rendering many divs as it would make the browser
      // unusable even after the divs are rendered.
      if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {
        this._finishRendering();
        return;
      }

      var lastFontSize;
      var lastFontFamily;
      for (var i = 0; i < textDivsLength; i++) {
        var textDiv = textDivs[i];
        if (textDiv.dataset.isWhitespace !== undefined) {
          continue;
        }

        var fontSize = textDiv.style.fontSize;
        var fontFamily = textDiv.style.fontFamily;

        // Only build font string and set to context if different from last.
        if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) {
          ctx.font = fontSize + ' ' + fontFamily;
          lastFontSize = fontSize;
          lastFontFamily = fontFamily;
        }

        var width = ctx.measureText(textDiv.textContent).width;
        if (width > 0) {
          textLayerFrag.appendChild(textDiv);
          var transform;
          if (textDiv.dataset.canvasWidth !== undefined) {
            // Dataset values come of type string.
            var textScale = textDiv.dataset.canvasWidth / width;
            transform = 'scaleX(' + textScale + ')';
          } else {
            transform = '';
          }
          var rotation = textDiv.dataset.angle;
          if (rotation) {
            transform = 'rotate(' + rotation + 'deg) ' + transform;
          }
          if (transform) {
            CustomStyle.setProp('transform' , textDiv, transform);
          }
        }
      }

      this.textLayerDiv.appendChild(textLayerFrag);
      this._finishRendering();
      this.updateMatches();
    },

    /**
     * Renders the text layer.
     * @param {number} timeout (optional) if specified, the rendering waits
     *   for specified amount of ms.
     */
    render: function TextLayerBuilder_render(timeout) {
      if (!this.divContentDone || this.renderingDone) {
        return;
      }

      if (this.renderTimer) {
        clearTimeout(this.renderTimer);
        this.renderTimer = null;
      }

      if (!timeout) { // Render right away
        this.renderLayer();
      } else { // Schedule
        var self = this;
        this.renderTimer = setTimeout(function() {
          self.renderLayer();
          self.renderTimer = null;
        }, timeout);
      }
    },

    appendText: function TextLayerBuilder_appendText(geom, styles) {
      var style = styles[geom.fontName];
      var textDiv = document.createElement('div');
      this.textDivs.push(textDiv);
      if (isAllWhitespace(geom.str)) {
        textDiv.dataset.isWhitespace = true;
        return;
      }
      var tx = PDFJS.Util.transform(this.viewport.transform, geom.transform);
      var angle = Math.atan2(tx[1], tx[0]);
      if (style.vertical) {
        angle += Math.PI / 2;
      }
      var fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3]));
      var fontAscent = fontHeight;
      if (style.ascent) {
        fontAscent = style.ascent * fontAscent;
      } else if (style.descent) {
        fontAscent = (1 + style.descent) * fontAscent;
      }

      var left;
      var top;
      if (angle === 0) {
        left = tx[4];
        top = tx[5] - fontAscent;
      } else {
        left = tx[4] + (fontAscent * Math.sin(angle));
        top = tx[5] - (fontAscent * Math.cos(angle));
      }
      textDiv.style.left = left + 'px';
      textDiv.style.top = top + 'px';
      textDiv.style.fontSize = fontHeight + 'px';
      textDiv.style.fontFamily = style.fontFamily;

      textDiv.textContent = geom.str;
      // |fontName| is only used by the Font Inspector. This test will succeed
      // when e.g. the Font Inspector is off but the Stepper is on, but it's
      // not worth the effort to do a more accurate test.
      if (PDFJS.pdfBug) {
        textDiv.dataset.fontName = geom.fontName;
      }
      // Storing into dataset will convert number into string.
      if (angle !== 0) {
        textDiv.dataset.angle = angle * (180 / Math.PI);
      }
      // We don't bother scaling single-char text divs, because it has very
      // little effect on text highlighting. This makes scrolling on docs with
      // lots of such divs a lot faster.
      if (textDiv.textContent.length > 1) {
        if (style.vertical) {
          textDiv.dataset.canvasWidth = geom.height * this.viewport.scale;
        } else {
          textDiv.dataset.canvasWidth = geom.width * this.viewport.scale;
        }
      }
    },

    setTextContent: function TextLayerBuilder_setTextContent(textContent) {
      this.textContent = textContent;

      var textItems = textContent.items;
      for (var i = 0, len = textItems.length; i < len; i++) {
        this.appendText(textItems[i], textContent.styles);
      }
      this.divContentDone = true;
    },

    convertMatches: function TextLayerBuilder_convertMatches(matches) {
      var i = 0;
      var iIndex = 0;
      var bidiTexts = this.textContent.items;
      var end = bidiTexts.length - 1;
      var queryLen = (this.findController === null ?
                      0 : this.findController.state.query.length);
      var ret = [];

      for (var m = 0, len = matches.length; m < len; m++) {
        // Calculate the start position.
        var matchIdx = matches[m];

        // Loop over the divIdxs.
        while (i !== end && matchIdx >= (iIndex + bidiTexts[i].str.length)) {
          iIndex += bidiTexts[i].str.length;
          i++;
        }

        if (i === bidiTexts.length) {
          console.error('Could not find a matching mapping');
        }

        var match = {
          begin: {
            divIdx: i,
            offset: matchIdx - iIndex
          }
        };

        // Calculate the end position.
        matchIdx += queryLen;

        // Somewhat the same array as above, but use > instead of >= to get
        // the end position right.
        while (i !== end && matchIdx > (iIndex + bidiTexts[i].str.length)) {
          iIndex += bidiTexts[i].str.length;
          i++;
        }

        match.end = {
          divIdx: i,
          offset: matchIdx - iIndex
        };
        ret.push(match);
      }

      return ret;
    },

    renderMatches: function TextLayerBuilder_renderMatches(matches) {
      // Early exit if there is nothing to render.
      if (matches.length === 0) {
        return;
      }

      var bidiTexts = this.textContent.items;
      var textDivs = this.textDivs;
      var prevEnd = null;
      var pageIdx = this.pageIdx;
      var isSelectedPage = (this.findController === null ?
        false : (pageIdx === this.findController.selected.pageIdx));
      var selectedMatchIdx = (this.findController === null ?
                              -1 : this.findController.selected.matchIdx);
      var highlightAll = (this.findController === null ?
                          false : this.findController.state.highlightAll);
      var infinity = {
        divIdx: -1,
        offset: undefined
      };

      function beginText(begin, className) {
        var divIdx = begin.divIdx;
        textDivs[divIdx].textContent = '';
        appendTextToDiv(divIdx, 0, begin.offset, className);
      }

      function appendTextToDiv(divIdx, fromOffset, toOffset, className) {
        var div = textDivs[divIdx];
        var content = bidiTexts[divIdx].str.substring(fromOffset, toOffset);
        var node = document.createTextNode(content);
        if (className) {
          var span = document.createElement('span');
          span.className = className;
          span.appendChild(node);
          div.appendChild(span);
          return;
        }
        div.appendChild(node);
      }

      var i0 = selectedMatchIdx, i1 = i0 + 1;
      if (highlightAll) {
        i0 = 0;
        i1 = matches.length;
      } else if (!isSelectedPage) {
        // Not highlighting all and this isn't the selected page, so do nothing.
        return;
      }

      for (var i = i0; i < i1; i++) {
        var match = matches[i];
        var begin = match.begin;
        var end = match.end;
        var isSelected = (isSelectedPage && i === selectedMatchIdx);
        var highlightSuffix = (isSelected ? ' selected' : '');

        if (this.findController) {
          this.findController.updateMatchPosition(pageIdx, i, textDivs,
                                                  begin.divIdx, end.divIdx);
        }

        // Match inside new div.
        if (!prevEnd || begin.divIdx !== prevEnd.divIdx) {
          // If there was a previous div, then add the text at the end.
          if (prevEnd !== null) {
            appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
          }
          // Clear the divs and set the content until the starting point.
          beginText(begin);
        } else {
          appendTextToDiv(prevEnd.divIdx, prevEnd.offset, begin.offset);
        }

        if (begin.divIdx === end.divIdx) {
          appendTextToDiv(begin.divIdx, begin.offset, end.offset,
                          'highlight' + highlightSuffix);
        } else {
          appendTextToDiv(begin.divIdx, begin.offset, infinity.offset,
                          'highlight begin' + highlightSuffix);
          for (var n0 = begin.divIdx + 1, n1 = end.divIdx; n0 < n1; n0++) {
            textDivs[n0].className = 'highlight middle' + highlightSuffix;
          }
          beginText(end, 'highlight end' + highlightSuffix);
        }
        prevEnd = end;
      }

      if (prevEnd) {
        appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
      }
    },

    updateMatches: function TextLayerBuilder_updateMatches() {
      // Only show matches when all rendering is done.
      if (!this.renderingDone) {
        return;
      }

      // Clear all matches.
      var matches = this.matches;
      var textDivs = this.textDivs;
      var bidiTexts = this.textContent.items;
      var clearedUntilDivIdx = -1;

      // Clear all current matches.
      for (var i = 0, len = matches.length; i < len; i++) {
        var match = matches[i];
        var begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);
        for (var n = begin, end = match.end.divIdx; n <= end; n++) {
          var div = textDivs[n];
          div.textContent = bidiTexts[n].str;
          div.className = '';
        }
        clearedUntilDivIdx = match.end.divIdx + 1;
      }

      if (this.findController === null || !this.findController.active) {
        return;
      }

      // Convert the matches on the page controller into the match format
      // used for the textLayer.
      this.matches = this.convertMatches(this.findController === null ?
        [] : (this.findController.pageMatches[this.pageIdx] || []));
      this.renderMatches(this.matches);
    }
  };
  return TextLayerBuilder;
})();

/**
 * @constructor
 * @implements IPDFTextLayerFactory
 */
function DefaultTextLayerFactory() {}
DefaultTextLayerFactory.prototype = {
  /**
   * @param {HTMLDivElement} textLayerDiv
   * @param {number} pageIndex
   * @param {PageViewport} viewport
   * @returns {TextLayerBuilder}
   */
  createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport) {
    return new TextLayerBuilder({
      textLayerDiv: textLayerDiv,
      pageIndex: pageIndex,
      viewport: viewport
    });
  }
};


/**
 * @typedef {Object} AnnotationsLayerBuilderOptions
 * @property {HTMLDivElement} pageDiv
 * @property {PDFPage} pdfPage
 * @property {IPDFLinkService} linkService
 */

/**
 * @class
 */
var AnnotationsLayerBuilder = (function AnnotationsLayerBuilderClosure() {
  /**
   * @param {AnnotationsLayerBuilderOptions} options
   * @constructs AnnotationsLayerBuilder
   */
  function AnnotationsLayerBuilder(options) {
    this.pageDiv = options.pageDiv;
    this.pdfPage = options.pdfPage;
    this.linkService = options.linkService;

    this.div = null;
  }
  AnnotationsLayerBuilder.prototype =
      /** @lends AnnotationsLayerBuilder.prototype */ {

    /**
     * @param {PageViewport} viewport
     */
    setupAnnotations:
        function AnnotationsLayerBuilder_setupAnnotations(viewport) {
      function bindLink(link, dest) {
        link.href = linkService.getDestinationHash(dest);
        link.onclick = function annotationsLayerBuilderLinksOnclick() {
          if (dest) {
            linkService.navigateTo(dest);
          }
          return false;
        };
        if (dest) {
          link.className = 'internalLink';
        }
      }

      function bindNamedAction(link, action) {
        link.href = linkService.getAnchorUrl('');
        link.onclick = function annotationsLayerBuilderNamedActionOnClick() {
          linkService.executeNamedAction(action);
          return false;
        };
        link.className = 'internalLink';
      }

      var linkService = this.linkService;
      var pdfPage = this.pdfPage;
      var self = this;

      pdfPage.getAnnotations().then(function (annotationsData) {
        viewport = viewport.clone({ dontFlip: true });
        var transform = viewport.transform;
        var transformStr = 'matrix(' + transform.join(',') + ')';
        var data, element, i, ii;

        if (self.div) {
          // If an annotationLayer already exists, refresh its children's
          // transformation matrices
          for (i = 0, ii = annotationsData.length; i < ii; i++) {
            data = annotationsData[i];
            element = self.div.querySelector(
                '[data-annotation-id="' + data.id + '"]');
            if (element) {
              CustomStyle.setProp('transform', element, transformStr);
            }
          }
          // See PDFPageView.reset()
          self.div.removeAttribute('hidden');
        } else {
          for (i = 0, ii = annotationsData.length; i < ii; i++) {
            data = annotationsData[i];
            if (!data || !data.hasHtml) {
              continue;
            }

            element = PDFJS.AnnotationUtils.getHtmlElement(data,
              pdfPage.commonObjs);
            element.setAttribute('data-annotation-id', data.id);
            if (typeof mozL10n !== 'undefined') {
              mozL10n.translate(element);
            }

            var rect = data.rect;
            var view = pdfPage.view;
            rect = PDFJS.Util.normalizeRect([
              rect[0],
                view[3] - rect[1] + view[1],
              rect[2],
                view[3] - rect[3] + view[1]
            ]);
            element.style.left = rect[0] + 'px';
            element.style.top = rect[1] + 'px';
            element.style.position = 'absolute';

            CustomStyle.setProp('transform', element, transformStr);
            var transformOriginStr = -rect[0] + 'px ' + -rect[1] + 'px';
            CustomStyle.setProp('transformOrigin', element, transformOriginStr);

            if (data.subtype === 'Link' && !data.url) {
              var link = element.getElementsByTagName('a')[0];
              if (link) {
                if (data.action) {
                  bindNamedAction(link, data.action);
                } else {
                  bindLink(link, ('dest' in data) ? data.dest : null);
                }
              }
            }

            if (!self.div) {
              var annotationLayerDiv = document.createElement('div');
              annotationLayerDiv.className = 'annotationLayer';
              self.pageDiv.appendChild(annotationLayerDiv);
              self.div = annotationLayerDiv;
            }

            self.div.appendChild(element);
          }
        }
      });
    },

    hide: function () {
      if (!this.div) {
        return;
      }
      this.div.setAttribute('hidden', 'true');
    }
  };
  return AnnotationsLayerBuilder;
})();

/**
 * @constructor
 * @implements IPDFAnnotationsLayerFactory
 */
function DefaultAnnotationsLayerFactory() {}
DefaultAnnotationsLayerFactory.prototype = {
  /**
   * @param {HTMLDivElement} pageDiv
   * @param {PDFPage} pdfPage
   * @returns {AnnotationsLayerBuilder}
   */
  createAnnotationsLayerBuilder: function (pageDiv, pdfPage) {
    return new AnnotationsLayerBuilder({
      pageDiv: pageDiv,
      pdfPage: pdfPage
    });
  }
};


/**
 * @typedef {Object} PDFViewerOptions
 * @property {HTMLDivElement} container - The container for the viewer element.
 * @property {HTMLDivElement} viewer - (optional) The viewer element.
 * @property {IPDFLinkService} linkService - The navigation/linking service.
 * @property {PDFRenderingQueue} renderingQueue - (optional) The rendering
 *   queue object.
 * @property {boolean} removePageBorders - (optional) Removes the border shadow
 *   around the pages. The default is false.
 */

/**
 * Simple viewer control to display PDF content/pages.
 * @class
 * @implements {IRenderableView}
 */
var PDFViewer = (function pdfViewer() {
  function PDFPageViewBuffer(size) {
    var data = [];
    this.push = function cachePush(view) {
      var i = data.indexOf(view);
      if (i >= 0) {
        data.splice(i, 1);
      }
      data.push(view);
      if (data.length > size) {
        data.shift().destroy();
      }
    };
    this.resize = function (newSize) {
      size = newSize;
      while (data.length > size) {
        data.shift().destroy();
      }
    };
  }

  /**
   * @constructs PDFViewer
   * @param {PDFViewerOptions} options
   */
  function PDFViewer(options) {
    this.container = options.container;
    this.viewer = options.viewer || options.container.firstElementChild;
    this.linkService = options.linkService || new SimpleLinkService(this);
    this.removePageBorders = options.removePageBorders || false;

    this.defaultRenderingQueue = !options.renderingQueue;
    if (this.defaultRenderingQueue) {
      // Custom rendering queue is not specified, using default one
      this.renderingQueue = new PDFRenderingQueue();
      this.renderingQueue.setViewer(this);
    } else {
      this.renderingQueue = options.renderingQueue;
    }

    this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));
    this.updateInProgress = false;
    this.presentationModeState = PresentationModeState.UNKNOWN;
    this._resetView();

    if (this.removePageBorders) {
      this.viewer.classList.add('removePageBorders');
    }
  }

  PDFViewer.prototype = /** @lends PDFViewer.prototype */{
    get pagesCount() {
      return this._pages.length;
    },

    getPageView: function (index) {
      return this._pages[index];
    },

    get currentPageNumber() {
      return this._currentPageNumber;
    },

    set currentPageNumber(val) {
      if (!this.pdfDocument) {
        this._currentPageNumber = val;
        return;
      }

      var event = document.createEvent('UIEvents');
      event.initUIEvent('pagechange', true, true, window, 0);
      event.updateInProgress = this.updateInProgress;

      if (!(0 < val && val <= this.pagesCount)) {
        event.pageNumber = this._currentPageNumber;
        event.previousPageNumber = val;
        this.container.dispatchEvent(event);
        return;
      }

      event.previousPageNumber = this._currentPageNumber;
      this._currentPageNumber = val;
      event.pageNumber = val;
      this.container.dispatchEvent(event);
    },

    /**
     * @returns {number}
     */
    get currentScale() {
      return this._currentScale;
    },

    /**
     * @param {number} val - Scale of the pages in percents.
     */
    set currentScale(val) {
      if (isNaN(val))  {
        throw new Error('Invalid numeric scale');
      }
      if (!this.pdfDocument) {
        this._currentScale = val;
        this._currentScaleValue = val.toString();
        return;
      }
      this._setScale(val, false);
    },

    /**
     * @returns {string}
     */
    get currentScaleValue() {
      return this._currentScaleValue;
    },

    /**
     * @param val - The scale of the pages (in percent or predefined value).
     */
    set currentScaleValue(val) {
      if (!this.pdfDocument) {
        this._currentScale = isNaN(val) ? UNKNOWN_SCALE : val;
        this._currentScaleValue = val;
        return;
      }
      this._setScale(val, false);
    },

    /**
     * @returns {number}
     */
    get pagesRotation() {
      return this._pagesRotation;
    },

    /**
     * @param {number} rotation - The rotation of the pages (0, 90, 180, 270).
     */
    set pagesRotation(rotation) {
      this._pagesRotation = rotation;

      for (var i = 0, l = this._pages.length; i < l; i++) {
        var pageView = this._pages[i];
        pageView.update(pageView.scale, rotation);
      }

      this._setScale(this._currentScaleValue, true);
    },

    /**
     * @param pdfDocument {PDFDocument}
     */
    setDocument: function (pdfDocument) {
      if (this.pdfDocument) {
        this._resetView();
      }

      this.pdfDocument = pdfDocument;
      if (!pdfDocument) {
        return;
      }

      var pagesCount = pdfDocument.numPages;
      var self = this;

      var resolvePagesPromise;
      var pagesPromise = new Promise(function (resolve) {
        resolvePagesPromise = resolve;
      });
      this.pagesPromise = pagesPromise;
      pagesPromise.then(function () {
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagesloaded', true, true, {
          pagesCount: pagesCount
        });
        self.container.dispatchEvent(event);
      });

      var isOnePageRenderedResolved = false;
      var resolveOnePageRendered = null;
      var onePageRendered = new Promise(function (resolve) {
        resolveOnePageRendered = resolve;
      });
      this.onePageRendered = onePageRendered;

      var bindOnAfterAndBeforeDraw = function (pageView) {
        pageView.onBeforeDraw = function pdfViewLoadOnBeforeDraw() {
          // Add the page to the buffer at the start of drawing. That way it can
          // be evicted from the buffer and destroyed even if we pause its
          // rendering.
          self._buffer.push(this);
        };
        // when page is painted, using the image as thumbnail base
        pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
          if (!isOnePageRenderedResolved) {
            isOnePageRenderedResolved = true;
            resolveOnePageRendered();
          }
        };
      };

      var firstPagePromise = pdfDocument.getPage(1);
      this.firstPagePromise = firstPagePromise;

      // Fetch a single page so we can get a viewport that will be the default
      // viewport for all pages
      return firstPagePromise.then(function(pdfPage) {
        var scale = this._currentScale || 1.0;
        var viewport = pdfPage.getViewport(scale * CSS_UNITS);
        for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
          var textLayerFactory = null;
          if (!PDFJS.disableTextLayer) {
            textLayerFactory = this;
          }
          var pageView = new PDFPageView({
            container: this.viewer,
            id: pageNum,
            scale: scale,
            defaultViewport: viewport.clone(),
            renderingQueue: this.renderingQueue,
            textLayerFactory: textLayerFactory,
            annotationsLayerFactory: this
          });
          bindOnAfterAndBeforeDraw(pageView);
          this._pages.push(pageView);
        }

        var linkService = this.linkService;

        // Fetch all the pages since the viewport is needed before printing
        // starts to create the correct size canvas. Wait until one page is
        // rendered so we don't tie up too many resources early on.
        onePageRendered.then(function () {
          if (!PDFJS.disableAutoFetch) {
            var getPagesLeft = pagesCount;
            for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
              pdfDocument.getPage(pageNum).then(function (pageNum, pdfPage) {
                var pageView = self._pages[pageNum - 1];
                if (!pageView.pdfPage) {
                  pageView.setPdfPage(pdfPage);
                }
                linkService.cachePageRef(pageNum, pdfPage.ref);
                getPagesLeft--;
                if (!getPagesLeft) {
                  resolvePagesPromise();
                }
              }.bind(null, pageNum));
            }
          } else {
            // XXX: Printing is semi-broken with auto fetch disabled.
            resolvePagesPromise();
          }
        });

        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagesinit', true, true, null);
        self.container.dispatchEvent(event);

        if (this.defaultRenderingQueue) {
          this.update();
        }

        if (this.findController) {
          this.findController.resolveFirstPage();
        }
      }.bind(this));
    },

    _resetView: function () {
      this._pages = [];
      this._currentPageNumber = 1;
      this._currentScale = UNKNOWN_SCALE;
      this._currentScaleValue = null;
      this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);
      this._location = null;
      this._pagesRotation = 0;
      this._pagesRequests = [];

      var container = this.viewer;
      while (container.hasChildNodes()) {
        container.removeChild(container.lastChild);
      }
    },

    _scrollUpdate: function () {
      if (this.pagesCount === 0) {
        return;
      }
      this.update();
      for (var i = 0, ii = this._pages.length; i < ii; i++) {
        this._pages[i].updatePosition();
      }
    },

    _setScaleDispatchEvent: function pdfViewer_setScaleDispatchEvent(
        newScale, newValue, preset) {
      var event = document.createEvent('UIEvents');
      event.initUIEvent('scalechange', true, true, window, 0);
      event.scale = newScale;
      if (preset) {
        event.presetValue = newValue;
      }
      this.container.dispatchEvent(event);
    },

    _setScaleUpdatePages: function pdfViewer_setScaleUpdatePages(
        newScale, newValue, noScroll, preset) {
      this._currentScaleValue = newValue;
      if (newScale === this._currentScale) {
        if (preset) {
          this._setScaleDispatchEvent(newScale, newValue, true);
        }
        return;
      }

      for (var i = 0, ii = this._pages.length; i < ii; i++) {
        this._pages[i].update(newScale);
      }
      this._currentScale = newScale;

      if (!noScroll) {
        var page = this._currentPageNumber, dest;
        if (this._location && !IGNORE_CURRENT_POSITION_ON_ZOOM &&
            !(this.isInPresentationMode || this.isChangingPresentationMode)) {
          page = this._location.pageNumber;
          dest = [null, { name: 'XYZ' }, this._location.left,
                  this._location.top, null];
        }
        this.scrollPageIntoView(page, dest);
      }

      this._setScaleDispatchEvent(newScale, newValue, preset);
    },

    _setScale: function pdfViewer_setScale(value, noScroll) {
      if (value === 'custom') {
        return;
      }
      var scale = parseFloat(value);

      if (scale > 0) {
        this._setScaleUpdatePages(scale, value, noScroll, false);
      } else {
        var currentPage = this._pages[this._currentPageNumber - 1];
        if (!currentPage) {
          return;
        }
        var hPadding = (this.isInPresentationMode || this.removePageBorders) ?
          0 : SCROLLBAR_PADDING;
        var vPadding = (this.isInPresentationMode || this.removePageBorders) ?
          0 : VERTICAL_PADDING;
        var pageWidthScale = (this.container.clientWidth - hPadding) /
                             currentPage.width * currentPage.scale;
        var pageHeightScale = (this.container.clientHeight - vPadding) /
                              currentPage.height * currentPage.scale;
        switch (value) {
          case 'page-actual':
            scale = 1;
            break;
          case 'page-width':
            scale = pageWidthScale;
            break;
          case 'page-height':
            scale = pageHeightScale;
            break;
          case 'page-fit':
            scale = Math.min(pageWidthScale, pageHeightScale);
            break;
          case 'auto':
            var isLandscape = (currentPage.width > currentPage.height);
            // For pages in landscape mode, fit the page height to the viewer
            // *unless* the page would thus become too wide to fit horizontally.
            var horizontalScale = isLandscape ?
              Math.min(pageHeightScale, pageWidthScale) : pageWidthScale;
            scale = Math.min(MAX_AUTO_SCALE, horizontalScale);
            break;
          default:
            console.error('pdfViewSetScale: \'' + value +
              '\' is an unknown zoom value.');
            return;
        }
        this._setScaleUpdatePages(scale, value, noScroll, true);
      }
    },

    /**
     * Scrolls page into view.
     * @param {number} pageNumber
     * @param {Array} dest - (optional) original PDF destination array:
     *   <page-ref> </XYZ|FitXXX> <args..>
     */
    scrollPageIntoView: function PDFViewer_scrollPageIntoView(pageNumber,
                                                              dest) {
      var pageView = this._pages[pageNumber - 1];

      if (this.isInPresentationMode) {
        if (this.linkService.page !== pageView.id) {
          // Avoid breaking getVisiblePages in presentation mode.
          this.linkService.page = pageView.id;
          return;
        }
        dest = null;
        // Fixes the case when PDF has different page sizes.
        this._setScale(this.currentScaleValue, true);
      }
      if (!dest) {
        scrollIntoView(pageView.div);
        return;
      }

      var x = 0, y = 0;
      var width = 0, height = 0, widthScale, heightScale;
      var changeOrientation = (pageView.rotation % 180 === 0 ? false : true);
      var pageWidth = (changeOrientation ? pageView.height : pageView.width) /
        pageView.scale / CSS_UNITS;
      var pageHeight = (changeOrientation ? pageView.width : pageView.height) /
        pageView.scale / CSS_UNITS;
      var scale = 0;
      switch (dest[1].name) {
        case 'XYZ':
          x = dest[2];
          y = dest[3];
          scale = dest[4];
          // If x and/or y coordinates are not supplied, default to
          // _top_ left of the page (not the obvious bottom left,
          // since aligning the bottom of the intended page with the
          // top of the window is rarely helpful).
          x = x !== null ? x : 0;
          y = y !== null ? y : pageHeight;
          break;
        case 'Fit':
        case 'FitB':
          scale = 'page-fit';
          break;
        case 'FitH':
        case 'FitBH':
          y = dest[2];
          scale = 'page-width';
          break;
        case 'FitV':
        case 'FitBV':
          x = dest[2];
          width = pageWidth;
          height = pageHeight;
          scale = 'page-height';
          break;
        case 'FitR':
          x = dest[2];
          y = dest[3];
          width = dest[4] - x;
          height = dest[5] - y;
          var viewerContainer = this.container;
          var hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;
          var vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;

          widthScale = (viewerContainer.clientWidth - hPadding) /
            width / CSS_UNITS;
          heightScale = (viewerContainer.clientHeight - vPadding) /
            height / CSS_UNITS;
          scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));
          break;
        default:
          return;
      }

      if (scale && scale !== this.currentScale) {
        this.currentScaleValue = scale;
      } else if (this.currentScale === UNKNOWN_SCALE) {
        this.currentScaleValue = DEFAULT_SCALE;
      }

      if (scale === 'page-fit' && !dest[4]) {
        scrollIntoView(pageView.div);
        return;
      }

      var boundingRect = [
        pageView.viewport.convertToViewportPoint(x, y),
        pageView.viewport.convertToViewportPoint(x + width, y + height)
      ];
      var left = Math.min(boundingRect[0][0], boundingRect[1][0]);
      var top = Math.min(boundingRect[0][1], boundingRect[1][1]);

      scrollIntoView(pageView.div, { left: left, top: top });
    },

    _updateLocation: function (firstPage) {
      var currentScale = this._currentScale;
      var currentScaleValue = this._currentScaleValue;
      var normalizedScaleValue =
        parseFloat(currentScaleValue) === currentScale ?
        Math.round(currentScale * 10000) / 100 : currentScaleValue;

      var pageNumber = firstPage.id;
      var pdfOpenParams = '#page=' + pageNumber;
      pdfOpenParams += '&zoom=' + normalizedScaleValue;
      var currentPageView = this._pages[pageNumber - 1];
      var container = this.container;
      var topLeft = currentPageView.getPagePoint(
        (container.scrollLeft - firstPage.x),
        (container.scrollTop - firstPage.y));
      var intLeft = Math.round(topLeft[0]);
      var intTop = Math.round(topLeft[1]);
      pdfOpenParams += ',' + intLeft + ',' + intTop;

      this._location = {
        pageNumber: pageNumber,
        scale: normalizedScaleValue,
        top: intTop,
        left: intLeft,
        pdfOpenParams: pdfOpenParams
      };
    },

    update: function () {
      var visible = this._getVisiblePages();
      var visiblePages = visible.views;
      if (visiblePages.length === 0) {
        return;
      }

      this.updateInProgress = true;

      var suggestedCacheSize = Math.max(DEFAULT_CACHE_SIZE,
          2 * visiblePages.length + 1);
      this._buffer.resize(suggestedCacheSize);

      this.renderingQueue.renderHighestPriority(visible);

      var currentId = this.currentPageNumber;
      var firstPage = visible.first;

      for (var i = 0, ii = visiblePages.length, stillFullyVisible = false;
           i < ii; ++i) {
        var page = visiblePages[i];

        if (page.percent < 100) {
          break;
        }
        if (page.id === currentId) {
          stillFullyVisible = true;
          break;
        }
      }

      if (!stillFullyVisible) {
        currentId = visiblePages[0].id;
      }

      if (!this.isInPresentationMode) {
        this.currentPageNumber = currentId;
      }

      this._updateLocation(firstPage);

      this.updateInProgress = false;

      var event = document.createEvent('UIEvents');
      event.initUIEvent('updateviewarea', true, true, window, 0);
      event.location = this._location;
      this.container.dispatchEvent(event);
    },

    containsElement: function (element) {
      return this.container.contains(element);
    },

    focus: function () {
      this.container.focus();
    },

    get isInPresentationMode() {
      return this.presentationModeState === PresentationModeState.FULLSCREEN;
    },

    get isChangingPresentationMode() {
      return this.PresentationModeState === PresentationModeState.CHANGING;
    },

    get isHorizontalScrollbarEnabled() {
      return (this.isInPresentationMode ?
        false : (this.container.scrollWidth > this.container.clientWidth));
    },

    _getVisiblePages: function () {
      if (!this.isInPresentationMode) {
        return getVisibleElements(this.container, this._pages, true);
      } else {
        // The algorithm in getVisibleElements doesn't work in all browsers and
        // configurations when presentation mode is active.
        var visible = [];
        var currentPage = this._pages[this._currentPageNumber - 1];
        visible.push({ id: currentPage.id, view: currentPage });
        return { first: currentPage, last: currentPage, views: visible };
      }
    },

    cleanup: function () {
      for (var i = 0, ii = this._pages.length; i < ii; i++) {
        if (this._pages[i] &&
            this._pages[i].renderingState !== RenderingStates.FINISHED) {
          this._pages[i].reset();
        }
      }
    },

    /**
     * @param {PDFPageView} pageView
     * @returns {PDFPage}
     * @private
     */
    _ensurePdfPageLoaded: function (pageView) {
      if (pageView.pdfPage) {
        return Promise.resolve(pageView.pdfPage);
      }
      var pageNumber = pageView.id;
      if (this._pagesRequests[pageNumber]) {
        return this._pagesRequests[pageNumber];
      }
      var promise = this.pdfDocument.getPage(pageNumber).then(
          function (pdfPage) {
        pageView.setPdfPage(pdfPage);
        this._pagesRequests[pageNumber] = null;
        return pdfPage;
      }.bind(this));
      this._pagesRequests[pageNumber] = promise;
      return promise;
    },

    forceRendering: function (currentlyVisiblePages) {
      var visiblePages = currentlyVisiblePages || this._getVisiblePages();
      var pageView = this.renderingQueue.getHighestPriority(visiblePages,
                                                            this._pages,
                                                            this.scroll.down);
      if (pageView) {
        this._ensurePdfPageLoaded(pageView).then(function () {
          this.renderingQueue.renderView(pageView);
        }.bind(this));
        return true;
      }
      return false;
    },

    getPageTextContent: function (pageIndex) {
      return this.pdfDocument.getPage(pageIndex + 1).then(function (page) {
        return page.getTextContent();
      });
    },

    /**
     * @param {HTMLDivElement} textLayerDiv
     * @param {number} pageIndex
     * @param {PageViewport} viewport
     * @returns {TextLayerBuilder}
     */
    createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport) {
      return new TextLayerBuilder({
        textLayerDiv: textLayerDiv,
        pageIndex: pageIndex,
        viewport: viewport,
        findController: this.isInPresentationMode ? null : this.findController
      });
    },

    /**
     * @param {HTMLDivElement} pageDiv
     * @param {PDFPage} pdfPage
     * @returns {AnnotationsLayerBuilder}
     */
    createAnnotationsLayerBuilder: function (pageDiv, pdfPage) {
      return new AnnotationsLayerBuilder({
        pageDiv: pageDiv,
        pdfPage: pdfPage,
        linkService: this.linkService
      });
    },

    setFindController: function (findController) {
      this.findController = findController;
    },
  };

  return PDFViewer;
})();

var SimpleLinkService = (function SimpleLinkServiceClosure() {
  function SimpleLinkService(pdfViewer) {
    this.pdfViewer = pdfViewer;
  }
  SimpleLinkService.prototype = {
    /**
     * @returns {number}
     */
    get page() {
      return this.pdfViewer.currentPageNumber;
    },
    /**
     * @param {number} value
     */
    set page(value) {
      this.pdfViewer.currentPageNumber = value;
    },
    /**
     * @param dest - The PDF destination object.
     */
    navigateTo: function (dest) {},
    /**
     * @param dest - The PDF destination object.
     * @returns {string} The hyperlink to the PDF object.
     */
    getDestinationHash: function (dest) {
      return '#';
    },
    /**
     * @param hash - The PDF parameters/hash.
     * @returns {string} The hyperlink to the PDF object.
     */
    getAnchorUrl: function (hash) {
      return '#';
    },
    /**
     * @param {string} hash
     */
    setHash: function (hash) {},
    /**
     * @param {string} action
     */
    executeNamedAction: function (action) {},
    /**
     * @param {number} pageNum - page number.
     * @param {Object} pageRef - reference to the page.
     */
    cachePageRef: function (pageNum, pageRef) {}
  };
  return SimpleLinkService;
})();


var THUMBNAIL_SCROLL_MARGIN = -19;


var THUMBNAIL_WIDTH = 98; // px
var THUMBNAIL_CANVAS_BORDER_WIDTH = 1; // px

/**
 * @typedef {Object} PDFThumbnailViewOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @property {number} id - The thumbnail's unique ID (normally its number).
 * @property {PageViewport} defaultViewport - The page viewport.
 * @property {IPDFLinkService} linkService - The navigation/linking service.
 * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
 */

/**
 * @class
 * @implements {IRenderableView}
 */
var PDFThumbnailView = (function PDFThumbnailViewClosure() {
  function getTempCanvas(width, height) {
    var tempCanvas = PDFThumbnailView.tempImageCache;
    if (!tempCanvas) {
      tempCanvas = document.createElement('canvas');
      PDFThumbnailView.tempImageCache = tempCanvas;
    }
    tempCanvas.width = width;
    tempCanvas.height = height;

    // Since this is a temporary canvas, we need to fill the canvas with a white
    // background ourselves. |_getPageDrawContext| uses CSS rules for this.
    var ctx = tempCanvas.getContext('2d');
    ctx.save();
    ctx.fillStyle = 'rgb(255, 255, 255)';
    ctx.fillRect(0, 0, width, height);
    ctx.restore();
    return tempCanvas;
  }

  /**
   * @constructs PDFThumbnailView
   * @param {PDFThumbnailViewOptions} options
   */
  function PDFThumbnailView(options) {
    var container = options.container;
    var id = options.id;
    var defaultViewport = options.defaultViewport;
    var linkService = options.linkService;
    var renderingQueue = options.renderingQueue;

    this.id = id;
    this.renderingId = 'thumbnail' + id;

    this.pdfPage = null;
    this.rotation = 0;
    this.viewport = defaultViewport;
    this.pdfPageRotate = defaultViewport.rotation;

    this.linkService = linkService;
    this.renderingQueue = renderingQueue;

    this.hasImage = false;
    this.resume = null;
    this.renderingState = RenderingStates.INITIAL;

    this.pageWidth = this.viewport.width;
    this.pageHeight = this.viewport.height;
    this.pageRatio = this.pageWidth / this.pageHeight;

    this.canvasWidth = THUMBNAIL_WIDTH;
    this.canvasHeight = (this.canvasWidth / this.pageRatio) | 0;
    this.scale = this.canvasWidth / this.pageWidth;

    var anchor = document.createElement('a');
    anchor.href = linkService.getAnchorUrl('#page=' + id);
    anchor.title = mozL10n.get('thumb_page_title', {page: id}, 'Page {{page}}');
    anchor.onclick = function stopNavigation() {
      linkService.page = id;
      return false;
    };

    var div = document.createElement('div');
    div.id = 'thumbnailContainer' + id;
    div.className = 'thumbnail';
    this.div = div;

    if (id === 1) {
      // Highlight the thumbnail of the first page when no page number is
      // specified (or exists in cache) when the document is loaded.
      div.classList.add('selected');
    }

    var ring = document.createElement('div');
    ring.className = 'thumbnailSelectionRing';
    var borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;
    ring.style.width = this.canvasWidth + borderAdjustment + 'px';
    ring.style.height = this.canvasHeight + borderAdjustment + 'px';
    this.ring = ring;

    div.appendChild(ring);
    anchor.appendChild(div);
    container.appendChild(anchor);
  }

  PDFThumbnailView.prototype = {
    setPdfPage: function PDFThumbnailView_setPdfPage(pdfPage) {
      this.pdfPage = pdfPage;
      this.pdfPageRotate = pdfPage.rotate;
      var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
      this.viewport = pdfPage.getViewport(1, totalRotation);
      this.reset();
    },

    reset: function PDFThumbnailView_reset() {
      if (this.renderTask) {
        this.renderTask.cancel();
      }
      this.hasImage = false;
      this.resume = null;
      this.renderingState = RenderingStates.INITIAL;

      this.pageWidth = this.viewport.width;
      this.pageHeight = this.viewport.height;
      this.pageRatio = this.pageWidth / this.pageHeight;

      this.canvasHeight = (this.canvasWidth / this.pageRatio) | 0;
      this.scale = (this.canvasWidth / this.pageWidth);

      this.div.removeAttribute('data-loaded');
      var ring = this.ring;
      var childNodes = ring.childNodes;
      for (var i = childNodes.length - 1; i >= 0; i--) {
        ring.removeChild(childNodes[i]);
      }
      var borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;
      ring.style.width = this.canvasWidth + borderAdjustment + 'px';
      ring.style.height = this.canvasHeight + borderAdjustment + 'px';

      if (this.canvas) {
        // Zeroing the width and height causes Firefox to release graphics
        // resources immediately, which can greatly reduce memory consumption.
        this.canvas.width = 0;
        this.canvas.height = 0;
        delete this.canvas;
      }
    },

    update: function PDFThumbnailView_update(rotation) {
      if (typeof rotation !== 'undefined') {
        this.rotation = rotation;
      }
      var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
      this.viewport = this.viewport.clone({
        scale: 1,
        rotation: totalRotation
      });
      this.reset();
    },

    /**
     * @private
     */
    _getPageDrawContext:
        function PDFThumbnailView_getPageDrawContext(noCtxScale) {
      var canvas = document.createElement('canvas');
      canvas.id = this.renderingId;

      canvas.className = 'thumbnailImage';
      canvas.setAttribute('aria-label', mozL10n.get('thumb_page_canvas',
        {page: this.id}, 'Thumbnail of Page {{page}}'));

      this.canvas = canvas;
      this.div.setAttribute('data-loaded', true);
      this.ring.appendChild(canvas);

      var ctx = canvas.getContext('2d');
      var outputScale = getOutputScale(ctx);
      canvas.width = (this.canvasWidth * outputScale.sx) | 0;
      canvas.height = (this.canvasHeight * outputScale.sy) | 0;
      canvas.style.width = this.canvasWidth + 'px';
      canvas.style.height = this.canvasHeight + 'px';
      if (!noCtxScale && outputScale.scaled) {
        ctx.scale(outputScale.sx, outputScale.sy);
      }
      return ctx;
    },

    draw: function PDFThumbnailView_draw() {
      if (this.renderingState !== RenderingStates.INITIAL) {
        console.error('Must be in new state before drawing');
      }
      if (this.hasImage) {
        return Promise.resolve(undefined);
      }
      this.hasImage = true;
      this.renderingState = RenderingStates.RUNNING;

      var resolveRenderPromise, rejectRenderPromise;
      var promise = new Promise(function (resolve, reject) {
        resolveRenderPromise = resolve;
        rejectRenderPromise = reject;
      });

      var self = this;
      function thumbnailDrawCallback(error) {
        // The renderTask may have been replaced by a new one, so only remove
        // the reference to the renderTask if it matches the one that is
        // triggering this callback.
        if (renderTask === self.renderTask) {
          self.renderTask = null;
        }
        if (error === 'cancelled') {
          rejectRenderPromise(error);
          return;
        }
        self.renderingState = RenderingStates.FINISHED;

        if (!error) {
          resolveRenderPromise(undefined);
        } else {
          rejectRenderPromise(error);
        }
      }

      var ctx = this._getPageDrawContext();
      var drawViewport = this.viewport.clone({ scale: this.scale });
      var renderContinueCallback = function renderContinueCallback(cont) {
        if (!self.renderingQueue.isHighestPriority(self)) {
          self.renderingState = RenderingStates.PAUSED;
          self.resume = function resumeCallback() {
            self.renderingState = RenderingStates.RUNNING;
            cont();
          };
          return;
        }
        cont();
      };

      var renderContext = {
        canvasContext: ctx,
        viewport: drawViewport,
        continueCallback: renderContinueCallback
      };
      var renderTask = this.renderTask = this.pdfPage.render(renderContext);

      renderTask.promise.then(
        function pdfPageRenderCallback() {
          thumbnailDrawCallback(null);
        },
        function pdfPageRenderError(error) {
          thumbnailDrawCallback(error);
        }
      );
      return promise;
    },

    setImage: function PDFThumbnailView_setImage(pageView) {
      var img = pageView.canvas;
      if (this.hasImage || !img) {
        return;
      }
      if (!this.pdfPage) {
        this.setPdfPage(pageView.pdfPage);
      }
      this.hasImage = true;
      this.renderingState = RenderingStates.FINISHED;

      var ctx = this._getPageDrawContext(true);
      var canvas = ctx.canvas;

      if (img.width <= 2 * canvas.width) {
        ctx.drawImage(img, 0, 0, img.width, img.height,
                      0, 0, canvas.width, canvas.height);
        return;
      }
      // drawImage does an awful job of rescaling the image, doing it gradually.
      var MAX_NUM_SCALING_STEPS = 3;
      var reducedWidth = canvas.width << MAX_NUM_SCALING_STEPS;
      var reducedHeight = canvas.height << MAX_NUM_SCALING_STEPS;
      var reducedImage = getTempCanvas(reducedWidth, reducedHeight);
      var reducedImageCtx = reducedImage.getContext('2d');

      while (reducedWidth > img.width || reducedHeight > img.height) {
        reducedWidth >>= 1;
        reducedHeight >>= 1;
      }
      reducedImageCtx.drawImage(img, 0, 0, img.width, img.height,
                                0, 0, reducedWidth, reducedHeight);
      while (reducedWidth > 2 * canvas.width) {
        reducedImageCtx.drawImage(reducedImage,
                                  0, 0, reducedWidth, reducedHeight,
                                  0, 0, reducedWidth >> 1, reducedHeight >> 1);
        reducedWidth >>= 1;
        reducedHeight >>= 1;
      }
      ctx.drawImage(reducedImage, 0, 0, reducedWidth, reducedHeight,
                    0, 0, canvas.width, canvas.height);
    }
  };

  return PDFThumbnailView;
})();

PDFThumbnailView.tempImageCache = null;


/**
 * @typedef {Object} PDFThumbnailViewerOptions
 * @property {HTMLDivElement} container - The container for the thumbnail
 *   elements.
 * @property {IPDFLinkService} linkService - The navigation/linking service.
 * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
 */

/**
 * Simple viewer control to display thumbnails for pages.
 * @class
 * @implements {IRenderableView}
 */
var PDFThumbnailViewer = (function PDFThumbnailViewerClosure() {
  /**
   * @constructs PDFThumbnailViewer
   * @param {PDFThumbnailViewerOptions} options
   */
  function PDFThumbnailViewer(options) {
    this.container = options.container;
    this.renderingQueue = options.renderingQueue;
    this.linkService = options.linkService;

    this.scroll = watchScroll(this.container, this._scrollUpdated.bind(this));
    this._resetView();
  }

  PDFThumbnailViewer.prototype = {
    /**
     * @private
     */
    _scrollUpdated: function PDFThumbnailViewer_scrollUpdated() {
      this.renderingQueue.renderHighestPriority();
    },

    getThumbnail: function PDFThumbnailViewer_getThumbnail(index) {
      return this.thumbnails[index];
    },

    /**
     * @private
     */
    _getVisibleThumbs: function PDFThumbnailViewer_getVisibleThumbs() {
      return getVisibleElements(this.container, this.thumbnails);
    },

    scrollThumbnailIntoView:
        function PDFThumbnailViewer_scrollThumbnailIntoView(page) {
      var selected = document.querySelector('.thumbnail.selected');
      if (selected) {
        selected.classList.remove('selected');
      }
      var thumbnail = document.getElementById('thumbnailContainer' + page);
      if (thumbnail) {
        thumbnail.classList.add('selected');
      }
      var visibleThumbs = this._getVisibleThumbs();
      var numVisibleThumbs = visibleThumbs.views.length;

      // If the thumbnail isn't currently visible, scroll it into view.
      if (numVisibleThumbs > 0) {
        var first = visibleThumbs.first.id;
        // Account for only one thumbnail being visible.
        var last = (numVisibleThumbs > 1 ? visibleThumbs.last.id : first);
        if (page <= first || page >= last) {
          scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN });
        }
      }
    },

    get pagesRotation() {
      return this._pagesRotation;
    },

    set pagesRotation(rotation) {
      this._pagesRotation = rotation;
      for (var i = 0, l = this.thumbnails.length; i < l; i++) {
        var thumb = this.thumbnails[i];
        thumb.update(rotation);
      }
    },

    cleanup: function PDFThumbnailViewer_cleanup() {
      var tempCanvas = PDFThumbnailView.tempImageCache;
      if (tempCanvas) {
        // Zeroing the width and height causes Firefox to release graphics
        // resources immediately, which can greatly reduce memory consumption.
        tempCanvas.width = 0;
        tempCanvas.height = 0;
      }
      PDFThumbnailView.tempImageCache = null;
    },

    /**
     * @private
     */
    _resetView: function PDFThumbnailViewer_resetView() {
      this.thumbnails = [];
      this._pagesRotation = 0;
      this._pagesRequests = [];
    },

    setDocument: function PDFThumbnailViewer_setDocument(pdfDocument) {
      if (this.pdfDocument) {
        // cleanup of the elements and views
        var thumbsView = this.container;
        while (thumbsView.hasChildNodes()) {
          thumbsView.removeChild(thumbsView.lastChild);
        }
        this._resetView();
      }

      this.pdfDocument = pdfDocument;
      if (!pdfDocument) {
        return Promise.resolve();
      }

      return pdfDocument.getPage(1).then(function (firstPage) {
        var pagesCount = pdfDocument.numPages;
        var viewport = firstPage.getViewport(1.0);
        for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
          var thumbnail = new PDFThumbnailView({
            container: this.container,
            id: pageNum,
            defaultViewport: viewport.clone(),
            linkService: this.linkService,
            renderingQueue: this.renderingQueue
          });
          this.thumbnails.push(thumbnail);
        }
      }.bind(this));
    },

    /**
     * @param {PDFPageView} pageView
     * @returns {PDFPage}
     * @private
     */
    _ensurePdfPageLoaded:
        function PDFThumbnailViewer_ensurePdfPageLoaded(thumbView) {
      if (thumbView.pdfPage) {
        return Promise.resolve(thumbView.pdfPage);
      }
      var pageNumber = thumbView.id;
      if (this._pagesRequests[pageNumber]) {
        return this._pagesRequests[pageNumber];
      }
      var promise = this.pdfDocument.getPage(pageNumber).then(
        function (pdfPage) {
          thumbView.setPdfPage(pdfPage);
          this._pagesRequests[pageNumber] = null;
          return pdfPage;
        }.bind(this));
      this._pagesRequests[pageNumber] = promise;
      return promise;
    },

    ensureThumbnailVisible:
        function PDFThumbnailViewer_ensureThumbnailVisible(page) {
      // Ensure that the thumbnail of the current page is visible
      // when switching from another view.
      scrollIntoView(document.getElementById('thumbnailContainer' + page));
    },

    forceRendering: function () {
      var visibleThumbs = this._getVisibleThumbs();
      var thumbView = this.renderingQueue.getHighestPriority(visibleThumbs,
                                                             this.thumbnails,
                                                             this.scroll.down);
      if (thumbView) {
        this._ensurePdfPageLoaded(thumbView).then(function () {
          this.renderingQueue.renderView(thumbView);
        }.bind(this));
        return true;
      }
      return false;
    }
  };

  return PDFThumbnailViewer;
})();


/**
 * @typedef {Object} PDFOutlineViewOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @property {Array} outline - An array of outline objects.
 * @property {IPDFLinkService} linkService - The navigation/linking service.
 */

/**
 * @class
 */
var PDFOutlineView = (function PDFOutlineViewClosure() {
  /**
   * @constructs PDFOutlineView
   * @param {PDFOutlineViewOptions} options
   */
  function PDFOutlineView(options) {
    this.container = options.container;
    this.outline = options.outline;
    this.linkService = options.linkService;
  }

  PDFOutlineView.prototype = {
    reset: function PDFOutlineView_reset() {
      var container = this.container;
      while (container.firstChild) {
        container.removeChild(container.firstChild);
      }
    },

    /**
     * @private
     */
    _dispatchEvent: function PDFOutlineView_dispatchEvent(outlineCount) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('outlineloaded', true, true, {
        outlineCount: outlineCount
      });
      this.container.dispatchEvent(event);
    },

    /**
     * @private
     */
    _bindLink: function PDFOutlineView_bindLink(element, item) {
      var linkService = this.linkService;
      element.href = linkService.getDestinationHash(item.dest);
      element.onclick = function goToDestination(e) {
        linkService.navigateTo(item.dest);
        return false;
      };
    },

    render: function PDFOutlineView_render() {
      var outline = this.outline;
      var outlineCount = 0;

      this.reset();

      if (!outline) {
        this._dispatchEvent(outlineCount);
        return;
      }

      var queue = [{ parent: this.container, items: this.outline }];
      while (queue.length > 0) {
        var levelData = queue.shift();
        for (var i = 0, len = levelData.items.length; i < len; i++) {
          var item = levelData.items[i];
          var div = document.createElement('div');
          div.className = 'outlineItem';
          var element = document.createElement('a');
          this._bindLink(element, item);
          element.textContent = item.title;
          div.appendChild(element);

          if (item.items.length > 0) {
            var itemsDiv = document.createElement('div');
            itemsDiv.className = 'outlineItems';
            div.appendChild(itemsDiv);
            queue.push({ parent: itemsDiv, items: item.items });
          }

          levelData.parent.appendChild(div);
          outlineCount++;
        }
      }

      this._dispatchEvent(outlineCount);
    }
  };

  return PDFOutlineView;
})();


/**
 * @typedef {Object} PDFAttachmentViewOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @property {Array} attachments - An array of attachment objects.
 * @property {DownloadManager} downloadManager - The download manager.
 */

/**
 * @class
 */
var PDFAttachmentView = (function PDFAttachmentViewClosure() {
  /**
   * @constructs PDFAttachmentView
   * @param {PDFAttachmentViewOptions} options
   */
  function PDFAttachmentView(options) {
    this.container = options.container;
    this.attachments = options.attachments;
    this.downloadManager = options.downloadManager;
  }

  PDFAttachmentView.prototype = {
    reset: function PDFAttachmentView_reset() {
      var container = this.container;
      while (container.firstChild) {
        container.removeChild(container.firstChild);
      }
    },

    /**
     * @private
     */
    _dispatchEvent: function PDFAttachmentView_dispatchEvent(attachmentsCount) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('attachmentsloaded', true, true, {
        attachmentsCount: attachmentsCount
      });
      this.container.dispatchEvent(event);
    },

    /**
     * @private
     */
    _bindLink: function PDFAttachmentView_bindLink(button, content, filename) {
      button.onclick = function downloadFile(e) {
        this.downloadManager.downloadData(content, filename, '');
        return false;
      }.bind(this);
    },

    render: function PDFAttachmentView_render() {
      var attachments = this.attachments;
      var attachmentsCount = 0;

      this.reset();

      if (!attachments) {
        this._dispatchEvent(attachmentsCount);
        return;
      }

      var names = Object.keys(attachments).sort(function(a, b) {
        return a.toLowerCase().localeCompare(b.toLowerCase());
      });
      attachmentsCount = names.length;

      for (var i = 0; i < attachmentsCount; i++) {
        var item = attachments[names[i]];
        var filename = getFileName(item.filename);
        var div = document.createElement('div');
        div.className = 'attachmentsItem';
        var button = document.createElement('button');
        this._bindLink(button, item.content, filename);
        button.textContent = filename;
        div.appendChild(button);
        this.container.appendChild(div);
      }

      this._dispatchEvent(attachmentsCount);
    }
  };

  return PDFAttachmentView;
})();


var PDFViewerApplication = {
  initialBookmark: document.location.hash.substring(1),
  initialDestination: null,
  initialized: false,
  fellback: false,
  pdfDocument: null,
  sidebarOpen: false,
  printing: false,
  /** @type {PDFViewer} */
  pdfViewer: null,
  /** @type {PDFThumbnailViewer} */
  pdfThumbnailViewer: null,
  /** @type {PDFRenderingQueue} */
  pdfRenderingQueue: null,
  /** @type {PDFPresentationMode} */
  pdfPresentationMode: null,
  /** @type {PDFDocumentProperties} */
  pdfDocumentProperties: null,
  /** @type {PDFLinkService} */
  pdfLinkService: null,
  /** @type {PDFHistory} */
  pdfHistory: null,
  pageRotation: 0,
  updateScaleControls: true,
  isInitialViewSet: false,
  animationStartedPromise: null,
  preferenceSidebarViewOnLoad: SidebarView.NONE,
  preferencePdfBugEnabled: false,
  preferenceShowPreviousViewOnLoad: true,
  preferenceDefaultZoomValue: '',
  isViewerEmbedded: (window.parent !== window),
  url: '',

  // called once when the document is loaded
  initialize: function pdfViewInitialize() {
    var pdfRenderingQueue = new PDFRenderingQueue();
    pdfRenderingQueue.onIdle = this.cleanup.bind(this);
    this.pdfRenderingQueue = pdfRenderingQueue;

    var pdfLinkService = new PDFLinkService();
    this.pdfLinkService = pdfLinkService;

    var container = document.getElementById('viewerContainer');
    var viewer = document.getElementById('viewer');
    this.pdfViewer = new PDFViewer({
      container: container,
      viewer: viewer,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService
    });
    pdfRenderingQueue.setViewer(this.pdfViewer);
    pdfLinkService.setViewer(this.pdfViewer);

    var thumbnailContainer = document.getElementById('thumbnailView');
    this.pdfThumbnailViewer = new PDFThumbnailViewer({
      container: thumbnailContainer,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService
    });
    pdfRenderingQueue.setThumbnailViewer(this.pdfThumbnailViewer);

    Preferences.initialize();

    this.pdfHistory = new PDFHistory({
      linkService: pdfLinkService
    });
    pdfLinkService.setHistory(this.pdfHistory);

    this.findController = new PDFFindController({
      pdfViewer: this.pdfViewer,
      integratedFind: this.supportsIntegratedFind
    });
    this.pdfViewer.setFindController(this.findController);

    this.findBar = new PDFFindBar({
      bar: document.getElementById('findbar'),
      toggleButton: document.getElementById('viewFind'),
      findField: document.getElementById('findInput'),
      highlightAllCheckbox: document.getElementById('findHighlightAll'),
      caseSensitiveCheckbox: document.getElementById('findMatchCase'),
      findMsg: document.getElementById('findMsg'),
      findStatusIcon: document.getElementById('findStatusIcon'),
      findPreviousButton: document.getElementById('findPrevious'),
      findNextButton: document.getElementById('findNext'),
      findController: this.findController
    });

    this.findController.setFindBar(this.findBar);

    HandTool.initialize({
      container: container,
      toggleHandTool: document.getElementById('toggleHandTool')
    });

    this.pdfDocumentProperties = new PDFDocumentProperties({
      overlayName: 'documentPropertiesOverlay',
      closeButton: document.getElementById('documentPropertiesClose'),
      fields: {
        'fileName': document.getElementById('fileNameField'),
        'fileSize': document.getElementById('fileSizeField'),
        'title': document.getElementById('titleField'),
        'author': document.getElementById('authorField'),
        'subject': document.getElementById('subjectField'),
        'keywords': document.getElementById('keywordsField'),
        'creationDate': document.getElementById('creationDateField'),
        'modificationDate': document.getElementById('modificationDateField'),
        'creator': document.getElementById('creatorField'),
        'producer': document.getElementById('producerField'),
        'version': document.getElementById('versionField'),
        'pageCount': document.getElementById('pageCountField')
      }
    });

    SecondaryToolbar.initialize({
      toolbar: document.getElementById('secondaryToolbar'),
      toggleButton: document.getElementById('secondaryToolbarToggle'),
      presentationModeButton:
        document.getElementById('secondaryPresentationMode'),
      openFile: document.getElementById('secondaryOpenFile'),
      print: document.getElementById('secondaryPrint'),
      download: document.getElementById('secondaryDownload'),
      viewBookmark: document.getElementById('secondaryViewBookmark'),
      firstPage: document.getElementById('firstPage'),
      lastPage: document.getElementById('lastPage'),
      pageRotateCw: document.getElementById('pageRotateCw'),
      pageRotateCcw: document.getElementById('pageRotateCcw'),
      documentPropertiesButton: document.getElementById('documentProperties')
    });

    if (this.supportsFullscreen) {
      var toolbar = SecondaryToolbar;
      this.pdfPresentationMode = new PDFPresentationMode({
        container: container,
        viewer: viewer,
        pdfThumbnailViewer: this.pdfThumbnailViewer,
        contextMenuItems: [
          { element: document.getElementById('contextFirstPage'),
            handler: toolbar.firstPageClick.bind(toolbar) },
          { element: document.getElementById('contextLastPage'),
            handler: toolbar.lastPageClick.bind(toolbar) },
          { element: document.getElementById('contextPageRotateCw'),
            handler: toolbar.pageRotateCwClick.bind(toolbar) },
          { element: document.getElementById('contextPageRotateCcw'),
            handler: toolbar.pageRotateCcwClick.bind(toolbar) }
        ]
      });
    }

    PasswordPrompt.initialize({
      overlayName: 'passwordOverlay',
      passwordField: document.getElementById('password'),
      passwordText: document.getElementById('passwordText'),
      passwordSubmit: document.getElementById('passwordSubmit'),
      passwordCancel: document.getElementById('passwordCancel')
    });

    var self = this;
    var initializedPromise = Promise.all([
      Preferences.get('enableWebGL').then(function resolved(value) {
        PDFJS.disableWebGL = !value;
      }),
      Preferences.get('sidebarViewOnLoad').then(function resolved(value) {
        self.preferenceSidebarViewOnLoad = value;
      }),
      Preferences.get('pdfBugEnabled').then(function resolved(value) {
        self.preferencePdfBugEnabled = value;
      }),
      Preferences.get('showPreviousViewOnLoad').then(function resolved(value) {
        self.preferenceShowPreviousViewOnLoad = value;
      }),
      Preferences.get('defaultZoomValue').then(function resolved(value) {
        self.preferenceDefaultZoomValue = value;
      }),
      Preferences.get('disableTextLayer').then(function resolved(value) {
        if (PDFJS.disableTextLayer === true) {
          return;
        }
        PDFJS.disableTextLayer = value;
      }),
      Preferences.get('disableRange').then(function resolved(value) {
        if (PDFJS.disableRange === true) {
          return;
        }
        PDFJS.disableRange = value;
      }),
      Preferences.get('disableAutoFetch').then(function resolved(value) {
        PDFJS.disableAutoFetch = value;
      }),
      Preferences.get('disableFontFace').then(function resolved(value) {
        if (PDFJS.disableFontFace === true) {
          return;
        }
        PDFJS.disableFontFace = value;
      }),
      Preferences.get('useOnlyCssZoom').then(function resolved(value) {
        PDFJS.useOnlyCssZoom = value;
      })
      // TODO move more preferences and other async stuff here
    ]).catch(function (reason) { });

    return initializedPromise.then(function () {
      PDFViewerApplication.initialized = true;
    });
  },

  zoomIn: function pdfViewZoomIn(ticks) {
    var newScale = this.pdfViewer.currentScale;
    do {
      newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
      newScale = Math.ceil(newScale * 10) / 10;
      newScale = Math.min(MAX_SCALE, newScale);
    } while (--ticks > 0 && newScale < MAX_SCALE);
    this.setScale(newScale, true);
  },

  zoomOut: function pdfViewZoomOut(ticks) {
    var newScale = this.pdfViewer.currentScale;
    do {
      newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
      newScale = Math.floor(newScale * 10) / 10;
      newScale = Math.max(MIN_SCALE, newScale);
    } while (--ticks > 0 && newScale > MIN_SCALE);
    this.setScale(newScale, true);
  },

  get currentScaleValue() {
    return this.pdfViewer.currentScaleValue;
  },

  get pagesCount() {
    return this.pdfDocument.numPages;
  },

  set page(val) {
    this.pdfLinkService.page = val;
  },

  get page() { // TODO remove
    return this.pdfLinkService.page;
  },

  get supportsPrinting() {
    var canvas = document.createElement('canvas');
    var value = 'mozPrintCallback' in canvas;

    return PDFJS.shadow(this, 'supportsPrinting', value);
  },

  get supportsFullscreen() {
    var doc = document.documentElement;
    var support = !!(doc.requestFullscreen || doc.mozRequestFullScreen ||
                     doc.webkitRequestFullScreen || doc.msRequestFullscreen);

    if (document.fullscreenEnabled === false ||
        document.mozFullScreenEnabled === false ||
        document.webkitFullscreenEnabled === false ||
        document.msFullscreenEnabled === false) {
      support = false;
    }
    if (support && PDFJS.disableFullscreen === true) {
      support = false;
    }

    return PDFJS.shadow(this, 'supportsFullscreen', support);
  },

  get supportsIntegratedFind() {
    var support = false;

    return PDFJS.shadow(this, 'supportsIntegratedFind', support);
  },

  get supportsDocumentFonts() {
    var support = true;

    return PDFJS.shadow(this, 'supportsDocumentFonts', support);
  },

  get supportsDocumentColors() {
    var support = true;

    return PDFJS.shadow(this, 'supportsDocumentColors', support);
  },

  get loadingBar() {
    var bar = new ProgressBar('#loadingBar', {});

    return PDFJS.shadow(this, 'loadingBar', bar);
  },


  setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
    this.url = url;
    try {
      this.setTitle(decodeURIComponent(getFileName(url)) || url);
    } catch (e) {
      // decodeURIComponent may throw URIError,
      // fall back to using the unprocessed url in that case
      this.setTitle(url);
    }
  },

  setTitle: function pdfViewSetTitle(title) {
    if (this.isViewerEmbedded) {
      // Embedded PDF viewers should not be changing their parent page's title.
      return;
    }
    document.title = title;
  },

  close: function pdfViewClose() {
    var errorWrapper = document.getElementById('errorWrapper');
    errorWrapper.setAttribute('hidden', 'true');

    if (!this.pdfDocument) {
      return;
    }

    this.pdfDocument.destroy();
    this.pdfDocument = null;

    this.pdfThumbnailViewer.setDocument(null);
    this.pdfViewer.setDocument(null);
    this.pdfLinkService.setDocument(null, null);

    if (typeof PDFBug !== 'undefined') {
      PDFBug.cleanup();
    }
  },

  // TODO(mack): This function signature should really be pdfViewOpen(url, args)
  open: function pdfViewOpen(file, scale, password,
                             pdfDataRangeTransport, args) {
    if (this.pdfDocument) {
      // Reload the preferences if a document was previously opened.
      Preferences.reload();
    }
    this.close();

    var parameters = {password: password};
    if (typeof file === 'string') { // URL
      this.setTitleUsingUrl(file);
      parameters.url = file;
    } else if (file && 'byteLength' in file) { // ArrayBuffer
      parameters.data = file;
    } else if (file.url && file.originalUrl) {
      this.setTitleUsingUrl(file.originalUrl);
      parameters.url = file.url;
    }
    if (args) {
      for (var prop in args) {
        parameters[prop] = args[prop];
      }
    }
    window.parameters = JSON.parse(JSON.stringify(parameters));
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    parameters = JSON.parse(JSON.stringify(window.parameters));
    window.parameters = null;
      var self = this;
    self.loading = true;
    self.downloadComplete = false;

    var passwordNeeded = function passwordNeeded(updatePassword, reason) {
      PasswordPrompt.updatePassword = updatePassword;
      PasswordPrompt.reason = reason;
      PasswordPrompt.open();
    };

    function getDocumentProgress(progressData) {
      self.progress(progressData.loaded / progressData.total);
    }

    PDFJS.getDocument(parameters, pdfDataRangeTransport, passwordNeeded,
                      getDocumentProgress).then(
      function getDocumentCallback(pdfDocument) {
        self.load(pdfDocument, scale);
        self.loading = false;
      },
      function getDocumentError(exception) {
        var message = exception && exception.message;
        var loadingErrorMessage = mozL10n.get('loading_error', null,
          'An error occurred while loading the PDF.');

        if (exception instanceof PDFJS.InvalidPDFException) {
          // change error message also for other builds
          loadingErrorMessage = mozL10n.get('invalid_file_error', null,
                                            'Invalid or corrupted PDF file.');
        } else if (exception instanceof PDFJS.MissingPDFException) {
          // special message for missing PDF's
          loadingErrorMessage = mozL10n.get('missing_file_error', null,
                                            'Missing PDF file.');
        } else if (exception instanceof PDFJS.UnexpectedResponseException) {
          loadingErrorMessage = mozL10n.get('unexpected_response_error', null,
                                            'Unexpected server response.');
        }

        var moreInfo = {
          message: message
        };
        self.error(loadingErrorMessage, moreInfo);
        self.loading = false;
      }
    );

    if (args && args.length) {
      PDFViewerApplication.pdfDocumentProperties.setFileSize(args.length);
    }
  },

  download: function pdfViewDownload() {
    function downloadByUrl() {
      downloadManager.downloadUrl(url, filename);
    }

    var url = this.url.split('#')[0];
    var filename = getPDFFileNameFromURL(url);
    var downloadManager = new DownloadManager();
    downloadManager.onerror = function (err) {
      // This error won't really be helpful because it's likely the
      // fallback won't work either (or is already open).
      PDFViewerApplication.error('PDF failed to download.');
    };

    if (!this.pdfDocument) { // the PDF is not ready yet
      downloadByUrl();
      return;
    }

    if (!this.downloadComplete) { // the PDF is still downloading
      downloadByUrl();
      return;
    }

    this.pdfDocument.getData().then(
      function getDataSuccess(data) {
        var blob = PDFJS.createBlob(data, 'application/pdf');
        downloadManager.download(blob, url, filename);
      },
      downloadByUrl // Error occurred try downloading with just the url.
    ).then(null, downloadByUrl);
  },

  fallback: function pdfViewFallback(featureId) {
  },

  /**
   * Show the error box.
   * @param {String} message A message that is human readable.
   * @param {Object} moreInfo (optional) Further information about the error
   *                            that is more technical.  Should have a 'message'
   *                            and optionally a 'stack' property.
   */
  error: function pdfViewError(message, moreInfo) {
    var moreInfoText = mozL10n.get('error_version_info',
      {version: PDFJS.version || '?', build: PDFJS.build || '?'},
      'PDF.js v{{version}} (build: {{build}})') + '\n';
    if (moreInfo) {
      moreInfoText +=
        mozL10n.get('error_message', {message: moreInfo.message},
        'Message: {{message}}');
      if (moreInfo.stack) {
        moreInfoText += '\n' +
          mozL10n.get('error_stack', {stack: moreInfo.stack},
          'Stack: {{stack}}');
      } else {
        if (moreInfo.filename) {
          moreInfoText += '\n' +
            mozL10n.get('error_file', {file: moreInfo.filename},
            'File: {{file}}');
        }
        if (moreInfo.lineNumber) {
          moreInfoText += '\n' +
            mozL10n.get('error_line', {line: moreInfo.lineNumber},
            'Line: {{line}}');
        }
      }
    }

    var errorWrapper = document.getElementById('errorWrapper');
    errorWrapper.removeAttribute('hidden');

    var errorMessage = document.getElementById('errorMessage');
    errorMessage.textContent = message;

    var closeButton = document.getElementById('errorClose');
    closeButton.onclick = function() {
      errorWrapper.setAttribute('hidden', 'true');
    };

    var errorMoreInfo = document.getElementById('errorMoreInfo');
    var moreInfoButton = document.getElementById('errorShowMore');
    var lessInfoButton = document.getElementById('errorShowLess');
    moreInfoButton.onclick = function() {
      errorMoreInfo.removeAttribute('hidden');
      moreInfoButton.setAttribute('hidden', 'true');
      lessInfoButton.removeAttribute('hidden');
      errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px';
    };
    lessInfoButton.onclick = function() {
      errorMoreInfo.setAttribute('hidden', 'true');
      moreInfoButton.removeAttribute('hidden');
      lessInfoButton.setAttribute('hidden', 'true');
    };
    moreInfoButton.oncontextmenu = noContextMenuHandler;
    lessInfoButton.oncontextmenu = noContextMenuHandler;
    closeButton.oncontextmenu = noContextMenuHandler;
    moreInfoButton.removeAttribute('hidden');
    lessInfoButton.setAttribute('hidden', 'true');
    errorMoreInfo.value = moreInfoText;
  },

  progress: function pdfViewProgress(level) {
    var percent = Math.round(level * 100);
    // When we transition from full request to range requests, it's possible
    // that we discard some of the loaded data. This can cause the loading
    // bar to move backwards. So prevent this by only updating the bar if it
    // increases.
    if (percent > this.loadingBar.percent || isNaN(percent)) {
      this.loadingBar.percent = percent;

      // When disableAutoFetch is enabled, it's not uncommon for the entire file
      // to never be fetched (depends on e.g. the file structure). In this case
      // the loading bar will not be completely filled, nor will it be hidden.
      // To prevent displaying a partially filled loading bar permanently, we
      // hide it when no data has been loaded during a certain amount of time.
      if (PDFJS.disableAutoFetch && percent) {
        if (this.disableAutoFetchLoadingBarTimeout) {
          clearTimeout(this.disableAutoFetchLoadingBarTimeout);
          this.disableAutoFetchLoadingBarTimeout = null;
        }
        this.loadingBar.show();

        this.disableAutoFetchLoadingBarTimeout = setTimeout(function () {
          this.loadingBar.hide();
          this.disableAutoFetchLoadingBarTimeout = null;
        }.bind(this), DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT);
      }
    }
  },

  load: function pdfViewLoad(pdfDocument, scale) {
    var self = this;
    scale = scale || UNKNOWN_SCALE;

    this.findController.reset();

    this.pdfDocument = pdfDocument;

    this.pdfDocumentProperties.setDocumentAndUrl(pdfDocument, this.url);

    var downloadedPromise = pdfDocument.getDownloadInfo().then(function() {
      self.downloadComplete = true;
      self.loadingBar.hide();
    });

    var pagesCount = pdfDocument.numPages;
    document.getElementById('numPages').textContent =
      mozL10n.get('page_of', {pageCount: pagesCount}, 'of {{pageCount}}');
    document.getElementById('pageNumber').max = pagesCount;

    var id = this.documentFingerprint = pdfDocument.fingerprint;
    var store = this.store = new ViewHistory(id);

    var baseDocumentUrl = null;
    this.pdfLinkService.setDocument(pdfDocument, baseDocumentUrl);

    var pdfViewer = this.pdfViewer;
    pdfViewer.currentScale = scale;
    pdfViewer.setDocument(pdfDocument);
    var firstPagePromise = pdfViewer.firstPagePromise;
    var pagesPromise = pdfViewer.pagesPromise;
    var onePageRendered = pdfViewer.onePageRendered;

    this.pageRotation = 0;
    this.isInitialViewSet = false;

    this.pdfThumbnailViewer.setDocument(pdfDocument);

    firstPagePromise.then(function(pdfPage) {
      downloadedPromise.then(function () {
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('documentload', true, true, {});
        window.dispatchEvent(event);
      });

      self.loadingBar.setWidth(document.getElementById('viewer'));

      if (!PDFJS.disableHistory && !self.isViewerEmbedded) {
        // The browsing history is only enabled when the viewer is standalone,
        // i.e. not when it is embedded in a web page.
        if (!self.preferenceShowPreviousViewOnLoad) {
          self.pdfHistory.clearHistoryState();
        }
        self.pdfHistory.initialize(self.documentFingerprint);

        if (self.pdfHistory.initialDestination) {
          self.initialDestination = self.pdfHistory.initialDestination;
        } else if (self.pdfHistory.initialBookmark) {
          self.initialBookmark = self.pdfHistory.initialBookmark;
        }
      }

      store.initializedPromise.then(function resolved() {
        var storedHash = null;
        if (self.preferenceShowPreviousViewOnLoad &&
            store.get('exists', false)) {
          var pageNum = store.get('page', '1');
          var zoom = self.preferenceDefaultZoomValue ||
                     store.get('zoom', self.pdfViewer.currentScale);
          var left = store.get('scrollLeft', '0');
          var top = store.get('scrollTop', '0');

          storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' +
                       left + ',' + top;
        } else if (self.preferenceDefaultZoomValue) {
          storedHash = 'page=1&zoom=' + self.preferenceDefaultZoomValue;
        }
        self.setInitialView(storedHash, scale);

        // Make all navigation keys work on document load,
        // unless the viewer is embedded in a web page.
        if (!self.isViewerEmbedded) {
          self.pdfViewer.focus();
        }
      }, function rejected(reason) {
        console.error(reason);
        self.setInitialView(null, scale);
      });
    });

    pagesPromise.then(function() {
      if (self.supportsPrinting) {
        pdfDocument.getJavaScript().then(function(javaScript) {
          if (javaScript.length) {
            console.warn('Warning: JavaScript is not supported');
            self.fallback(PDFJS.UNSUPPORTED_FEATURES.javaScript);
          }
          // Hack to support auto printing.
          var regex = /\bprint\s*\(/g;
          for (var i = 0, ii = javaScript.length; i < ii; i++) {
            var js = javaScript[i];
            if (js && regex.test(js)) {
              setTimeout(function() {
                window.print();
              });
              return;
            }
          }
        });
      }
    });

    // outline depends on pagesRefMap
    var promises = [pagesPromise, this.animationStartedPromise];
    Promise.all(promises).then(function() {
      pdfDocument.getOutline().then(function(outline) {
        var container = document.getElementById('outlineView');
        self.outline = new PDFOutlineView({
          container: container,
          outline: outline,
          linkService: self.pdfLinkService
        });
        self.outline.render();
        document.getElementById('viewOutline').disabled = !outline;

        if (!outline && !container.classList.contains('hidden')) {
          self.switchSidebarView('thumbs');
        }
        if (outline &&
            self.preferenceSidebarViewOnLoad === SidebarView.OUTLINE) {
          self.switchSidebarView('outline', true);
        }
      });
      pdfDocument.getAttachments().then(function(attachments) {
        var container = document.getElementById('attachmentsView');
        self.attachments = new PDFAttachmentView({
          container: container,
          attachments: attachments,
          downloadManager: new DownloadManager()
        });
        self.attachments.render();
        document.getElementById('viewAttachments').disabled = !attachments;

        if (!attachments && !container.classList.contains('hidden')) {
          self.switchSidebarView('thumbs');
        }
        if (attachments &&
            self.preferenceSidebarViewOnLoad === SidebarView.ATTACHMENTS) {
          self.switchSidebarView('attachments', true);
        }
      });
    });

    if (self.preferenceSidebarViewOnLoad === SidebarView.THUMBS) {
      Promise.all([firstPagePromise, onePageRendered]).then(function () {
        self.switchSidebarView('thumbs', true);
      });
    }

    pdfDocument.getMetadata().then(function(data) {
      var info = data.info, metadata = data.metadata;
      self.documentInfo = info;
      self.metadata = metadata;

      // Provides some basic debug information
      console.log('PDF ' + pdfDocument.fingerprint + ' [' +
                  info.PDFFormatVersion + ' ' + (info.Producer || '-').trim() +
                  ' / ' + (info.Creator || '-').trim() + ']' +
                  ' (PDF.js: ' + (PDFJS.version || '-') +
                  (!PDFJS.disableWebGL ? ' [WebGL]' : '') + ')');

      var pdfTitle;
      if (metadata && metadata.has('dc:title')) {
        var title = metadata.get('dc:title');
        // Ghostscript sometimes return 'Untitled', sets the title to 'Untitled'
        if (title !== 'Untitled') {
          pdfTitle = title;
        }
      }

      if (!pdfTitle && info && info['Title']) {
        pdfTitle = info['Title'];
      }

      if (pdfTitle) {
        self.setTitle(pdfTitle + ' - ' + document.title);
      }

      if (info.IsAcroFormPresent) {
        console.warn('Warning: AcroForm/XFA is not supported');
        self.fallback(PDFJS.UNSUPPORTED_FEATURES.forms);
      }

    });
  },

  setInitialView: function pdfViewSetInitialView(storedHash, scale) {
    this.isInitialViewSet = true;

    // When opening a new file (when one is already loaded in the viewer):
    // Reset 'currentPageNumber', since otherwise the page's scale will be wrong
    // if 'currentPageNumber' is larger than the number of pages in the file.
    document.getElementById('pageNumber').value =
      this.pdfViewer.currentPageNumber = 1;

    if (this.initialDestination) {
      this.pdfLinkService.navigateTo(this.initialDestination);
      this.initialDestination = null;
    } else if (this.initialBookmark) {
      this.pdfLinkService.setHash(this.initialBookmark);
      this.pdfHistory.push({ hash: this.initialBookmark }, true);
      this.initialBookmark = null;
    } else if (storedHash) {
      this.pdfLinkService.setHash(storedHash);
    } else if (scale) {
      this.setScale(scale, true);
      this.page = 1;
    }

    if (this.pdfViewer.currentScale === UNKNOWN_SCALE) {
      // Scale was not initialized: invalid bookmark or scale was not specified.
      // Setting the default one.
      this.setScale(DEFAULT_SCALE, true);
    }
  },

  cleanup: function pdfViewCleanup() {
    this.pdfViewer.cleanup();
    this.pdfThumbnailViewer.cleanup();
    this.pdfDocument.cleanup();
  },

  forceRendering: function pdfViewForceRendering() {
    this.pdfRenderingQueue.printing = this.printing;
    this.pdfRenderingQueue.isThumbnailViewEnabled = this.sidebarOpen;
    this.pdfRenderingQueue.renderHighestPriority();
  },

  refreshThumbnailViewer: function pdfViewRefreshThumbnailViewer() {
    var pdfViewer = this.pdfViewer;
    var thumbnailViewer = this.pdfThumbnailViewer;

    // set thumbnail images of rendered pages
    var pagesCount = pdfViewer.pagesCount;
    for (var pageIndex = 0; pageIndex < pagesCount; pageIndex++) {
      var pageView = pdfViewer.getPageView(pageIndex);
      if (pageView && pageView.renderingState === RenderingStates.FINISHED) {
        var thumbnailView = thumbnailViewer.getThumbnail(pageIndex);
        thumbnailView.setImage(pageView);
      }
    }

    thumbnailViewer.scrollThumbnailIntoView(this.page);
  },

  switchSidebarView: function pdfViewSwitchSidebarView(view, openSidebar) {
    if (openSidebar && !this.sidebarOpen) {
      document.getElementById('sidebarToggle').click();
    }
    var thumbsView = document.getElementById('thumbnailView');
    var outlineView = document.getElementById('outlineView');
    var attachmentsView = document.getElementById('attachmentsView');

    var thumbsButton = document.getElementById('viewThumbnail');
    var outlineButton = document.getElementById('viewOutline');
    var attachmentsButton = document.getElementById('viewAttachments');

    switch (view) {
      case 'thumbs':
        var wasAnotherViewVisible = thumbsView.classList.contains('hidden');

        thumbsButton.classList.add('toggled');
        outlineButton.classList.remove('toggled');
        attachmentsButton.classList.remove('toggled');
        thumbsView.classList.remove('hidden');
        outlineView.classList.add('hidden');
        attachmentsView.classList.add('hidden');

        this.forceRendering();

        if (wasAnotherViewVisible) {
          this.pdfThumbnailViewer.ensureThumbnailVisible(this.page);
        }
        break;

      case 'outline':
        thumbsButton.classList.remove('toggled');
        outlineButton.classList.add('toggled');
        attachmentsButton.classList.remove('toggled');
        thumbsView.classList.add('hidden');
        outlineView.classList.remove('hidden');
        attachmentsView.classList.add('hidden');

        if (outlineButton.getAttribute('disabled')) {
          return;
        }
        break;

      case 'attachments':
        thumbsButton.classList.remove('toggled');
        outlineButton.classList.remove('toggled');
        attachmentsButton.classList.add('toggled');
        thumbsView.classList.add('hidden');
        outlineView.classList.add('hidden');
        attachmentsView.classList.remove('hidden');

        if (attachmentsButton.getAttribute('disabled')) {
          return;
        }
        break;
    }
  },

  beforePrint: function pdfViewSetupBeforePrint() {
    if (!this.supportsPrinting) {
      var printMessage = mozL10n.get('printing_not_supported', null,
          'Warning: Printing is not fully supported by this browser.');
      this.error(printMessage);
      return;
    }

    var alertNotReady = false;
    var i, ii;
    if (!this.pdfDocument || !this.pagesCount) {
      alertNotReady = true;
    } else {
      for (i = 0, ii = this.pagesCount; i < ii; ++i) {
        if (!this.pdfViewer.getPageView(i).pdfPage) {
          alertNotReady = true;
          break;
        }
      }
    }
    if (alertNotReady) {
      var notReadyMessage = mozL10n.get('printing_not_ready', null,
          'Warning: The PDF is not fully loaded for printing.');
      window.alert(notReadyMessage);
      return;
    }

    this.printing = true;
    this.forceRendering();

    var body = document.querySelector('body');
    body.setAttribute('data-mozPrintCallback', true);

    if (!this.hasEqualPageSizes) {
      console.warn('Not all pages have the same size. The printed result ' +
          'may be incorrect!');
    }

    // Insert a @page + size rule to make sure that the page size is correctly
    // set. Note that we assume that all pages have the same size, because
    // variable-size pages are not supported yet (at least in Chrome & Firefox).
    // TODO(robwu): Use named pages when size calculation bugs get resolved
    // (e.g. https://crbug.com/355116) AND when support for named pages is
    // added (http://www.w3.org/TR/css3-page/#using-named-pages).
    // In browsers where @page + size is not supported (such as Firefox,
    // https://bugzil.la/851441), the next stylesheet will be ignored and the
    // user has to select the correct paper size in the UI if wanted.
    this.pageStyleSheet = document.createElement('style');
    var pageSize = this.pdfViewer.getPageView(0).pdfPage.getViewport(1);
    this.pageStyleSheet.textContent =
      // "size:<width> <height>" is what we need. But also add "A4" because
      // Firefox incorrectly reports support for the other value.
      '@supports ((size:A4) and (size:1pt 1pt)) {' +
      '@page { size: ' + pageSize.width + 'pt ' + pageSize.height + 'pt;}' +
      // The canvas and each ancestor node must have a height of 100% to make
      // sure that each canvas is printed on exactly one page.
      '#printContainer {height:100%}' +
      '#printContainer > div {width:100% !important;height:100% !important;}' +
      '}';
    body.appendChild(this.pageStyleSheet);

    for (i = 0, ii = this.pagesCount; i < ii; ++i) {
      this.pdfViewer.getPageView(i).beforePrint();
    }

  },

  // Whether all pages of the PDF have the same width and height.
  get hasEqualPageSizes() {
    var firstPage = this.pdfViewer.getPageView(0);
    for (var i = 1, ii = this.pagesCount; i < ii; ++i) {
      var pageView = this.pdfViewer.getPageView(i);
      if (pageView.width !== firstPage.width ||
          pageView.height !== firstPage.height) {
        return false;
      }
    }
    return true;
  },

  afterPrint: function pdfViewSetupAfterPrint() {
    var div = document.getElementById('printContainer');
    while (div.hasChildNodes()) {
      div.removeChild(div.lastChild);
    }

    if (this.pageStyleSheet && this.pageStyleSheet.parentNode) {
      this.pageStyleSheet.parentNode.removeChild(this.pageStyleSheet);
      this.pageStyleSheet = null;
    }

    this.printing = false;
    this.forceRendering();
  },

  setScale: function (value, resetAutoSettings) {
    this.updateScaleControls = !!resetAutoSettings;
    this.pdfViewer.currentScaleValue = value;
    this.updateScaleControls = true;
  },

  rotatePages: function pdfViewRotatePages(delta) {
    var pageNumber = this.page;
    this.pageRotation = (this.pageRotation + 360 + delta) % 360;
    this.pdfViewer.pagesRotation = this.pageRotation;
    this.pdfThumbnailViewer.pagesRotation = this.pageRotation;

    this.forceRendering();

    this.pdfViewer.scrollPageIntoView(pageNumber);
  },

  requestPresentationMode: function pdfViewRequestPresentationMode() {
    if (!this.pdfPresentationMode) {
      return;
    }
    this.pdfPresentationMode.request();
  },

  /**
   * @param {number} delta - The delta value from the mouse event.
   */
  scrollPresentationMode: function pdfViewScrollPresentationMode(delta) {
    if (!this.pdfPresentationMode) {
      return;
    }
    this.pdfPresentationMode.mouseScroll(delta);
  }
};
window.PDFView = PDFViewerApplication; // obsolete name, using it as an alias


function webViewerLoad(evt) {
  PDFViewerApplication.initialize().then(webViewerInitialized);
}

function webViewerInitialized() {
  var queryString = document.location.search.substring(1) || document.location.hash.substring(1);
  var params = parseQueryString(queryString);
  var file = 'file' in params ? params.file : DEFAULT_URL;

  var fileInput = document.createElement('input');
  fileInput.id = 'fileInput';
  fileInput.className = 'fileInput';
  fileInput.setAttribute('type', 'file');
  fileInput.oncontextmenu = noContextMenuHandler;
  document.body.appendChild(fileInput);

  if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
    document.getElementById('openFile').setAttribute('hidden', 'true');
    document.getElementById('secondaryOpenFile').setAttribute('hidden', 'true');
  } else {
    document.getElementById('fileInput').value = null;
  }

  var locale = PDFJS.locale || navigator.language;

  if (PDFViewerApplication.preferencePdfBugEnabled) {
    // Special debugging flags in the hash section of the URL.
    var hash = document.location.hash.substring(1);
    var hashParams = parseQueryString(hash);

    if ('disableworker' in hashParams) {
      PDFJS.disableWorker = (hashParams['disableworker'] === 'true');
    }
    if ('disablerange' in hashParams) {
      PDFJS.disableRange = (hashParams['disablerange'] === 'true');
    }
    if ('disablestream' in hashParams) {
      PDFJS.disableStream = (hashParams['disablestream'] === 'true');
    }
    if ('disableautofetch' in hashParams) {
      PDFJS.disableAutoFetch = (hashParams['disableautofetch'] === 'true');
    }
    if ('disablefontface' in hashParams) {
      PDFJS.disableFontFace = (hashParams['disablefontface'] === 'true');
    }
    if ('disablehistory' in hashParams) {
      PDFJS.disableHistory = (hashParams['disablehistory'] === 'true');
    }
    if ('webgl' in hashParams) {
      PDFJS.disableWebGL = (hashParams['webgl'] !== 'true');
    }
    if ('useonlycsszoom' in hashParams) {
      PDFJS.useOnlyCssZoom = (hashParams['useonlycsszoom'] === 'true');
    }
    if ('verbosity' in hashParams) {
      PDFJS.verbosity = hashParams['verbosity'] | 0;
    }
    if ('ignorecurrentpositiononzoom' in hashParams) {
      IGNORE_CURRENT_POSITION_ON_ZOOM =
        (hashParams['ignorecurrentpositiononzoom'] === 'true');
    }
    if ('locale' in hashParams) {
      locale = hashParams['locale'];
    }
    if ('textlayer' in hashParams) {
      switch (hashParams['textlayer']) {
        case 'off':
          PDFJS.disableTextLayer = true;
          break;
        case 'visible':
        case 'shadow':
        case 'hover':
          var viewer = document.getElementById('viewer');
          viewer.classList.add('textLayer-' + hashParams['textlayer']);
          break;
      }
    }
    if ('pdfbug' in hashParams) {
      PDFJS.pdfBug = true;
      var pdfBug = hashParams['pdfbug'];
      var enabled = pdfBug.split(',');
      PDFBug.enable(enabled);
      PDFBug.init();
    }
  }

  mozL10n.setLanguage(locale);

  if (!PDFViewerApplication.supportsPrinting) {
    document.getElementById('print').classList.add('hidden');
    document.getElementById('secondaryPrint').classList.add('hidden');
  }

  if (!PDFViewerApplication.supportsFullscreen) {
    document.getElementById('presentationMode').classList.add('hidden');
    document.getElementById('secondaryPresentationMode').
      classList.add('hidden');
  }

  if (PDFViewerApplication.supportsIntegratedFind) {
    document.getElementById('viewFind').classList.add('hidden');
  }

  // Listen for unsupported features to trigger the fallback UI.
  PDFJS.UnsupportedManager.listen(
    PDFViewerApplication.fallback.bind(PDFViewerApplication));

  // Suppress context menus for some controls
  document.getElementById('scaleSelect').oncontextmenu = noContextMenuHandler;

  var mainContainer = document.getElementById('mainContainer');
  var outerContainer = document.getElementById('outerContainer');
  mainContainer.addEventListener('transitionend', function(e) {
    if (e.target === mainContainer) {
      var event = document.createEvent('UIEvents');
      event.initUIEvent('resize', false, false, window, 0);
      window.dispatchEvent(event);
      outerContainer.classList.remove('sidebarMoving');
    }
  }, true);

  document.getElementById('sidebarToggle').addEventListener('click',
    function() {
      this.classList.toggle('toggled');
      outerContainer.classList.add('sidebarMoving');
      outerContainer.classList.toggle('sidebarOpen');
      PDFViewerApplication.sidebarOpen =
        outerContainer.classList.contains('sidebarOpen');
      if (PDFViewerApplication.sidebarOpen) {
        PDFViewerApplication.refreshThumbnailViewer();
      }
      PDFViewerApplication.forceRendering();
    });

  document.getElementById('viewThumbnail').addEventListener('click',
    function() {
      PDFViewerApplication.switchSidebarView('thumbs');
    });

  document.getElementById('viewOutline').addEventListener('click',
    function() {
      PDFViewerApplication.switchSidebarView('outline');
    });

  document.getElementById('viewAttachments').addEventListener('click',
    function() {
      PDFViewerApplication.switchSidebarView('attachments');
    });

  document.getElementById('previous').addEventListener('click',
    function() {
      PDFViewerApplication.page--;
    });

  document.getElementById('next').addEventListener('click',
    function() {
      PDFViewerApplication.page++;
    });

  document.getElementById('zoomIn').addEventListener('click',
    function() {
      PDFViewerApplication.zoomIn();
    });

  document.getElementById('zoomOut').addEventListener('click',
    function() {
      PDFViewerApplication.zoomOut();
    });

  document.getElementById('pageNumber').addEventListener('click', function() {
    this.select();
  });

  document.getElementById('pageNumber').addEventListener('change', function() {
    // Handle the user inputting a floating point number.
    PDFViewerApplication.page = (this.value | 0);

    if (this.value !== (this.value | 0).toString()) {
      this.value = PDFViewerApplication.page;
    }
  });

  document.getElementById('scaleSelect').addEventListener('change',
    function() {
      PDFViewerApplication.setScale(this.value, false);
    });

  document.getElementById('presentationMode').addEventListener('click',
    SecondaryToolbar.presentationModeClick.bind(SecondaryToolbar));

  document.getElementById('openFile').addEventListener('click',
    SecondaryToolbar.openFileClick.bind(SecondaryToolbar));

  document.getElementById('print').addEventListener('click',
    SecondaryToolbar.printClick.bind(SecondaryToolbar));

  document.getElementById('download').addEventListener('click',
    SecondaryToolbar.downloadClick.bind(SecondaryToolbar));


  if (file && file.lastIndexOf('file:', 0) === 0) {
    // file:-scheme. Load the contents in the main thread because QtWebKit
    // cannot load file:-URLs in a Web Worker. file:-URLs are usually loaded
    // very quickly, so there is no need to set up progress event listeners.
    PDFViewerApplication.setTitleUsingUrl(file);
    var xhr = new XMLHttpRequest();
    xhr.onload = function() {
      PDFViewerApplication.open(new Uint8Array(xhr.response), 0);
    };
    try {
      xhr.open('GET', file);

      xhr.responseType = 'arraybuffer';
      xhr.send();
    } catch (e) {
      PDFViewerApplication.error(mozL10n.get('loading_error', null,
        'An error occurred while loading the PDF.'), e);
    }
    return;
  }

  if (file) {
    PDFViewerApplication.open(file, 0);
  }
}

document.addEventListener('DOMContentLoaded', webViewerLoad, true);

document.addEventListener('pagerendered', function (e) {
  var pageNumber = e.detail.pageNumber;
  var pageIndex = pageNumber - 1;
  var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);

  if (PDFViewerApplication.sidebarOpen) {
    var thumbnailView = PDFViewerApplication.pdfThumbnailViewer.
                        getThumbnail(pageIndex);
    thumbnailView.setImage(pageView);
  }

  if (PDFJS.pdfBug && Stats.enabled && pageView.stats) {
    Stats.add(pageNumber, pageView.stats);
  }

  if (pageView.error) {
    PDFViewerApplication.error(mozL10n.get('rendering_error', null,
      'An error occurred while rendering the page.'), pageView.error);
  }

  // If the page is still visible when it has finished rendering,
  // ensure that the page number input loading indicator is hidden.
  if (pageNumber === PDFViewerApplication.page) {
    var pageNumberInput = document.getElementById('pageNumber');
    pageNumberInput.classList.remove(PAGE_NUMBER_LOADING_INDICATOR);
  }

}, true);

document.addEventListener('textlayerrendered', function (e) {
  var pageIndex = e.detail.pageNumber - 1;
  var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);

}, true);

document.addEventListener('namedaction', function (e) {
  // Processing couple of named actions that might be useful.
  // See also PDFLinkService.executeNamedAction
  var action = e.action;
  switch (action) {
    case 'GoToPage':
      document.getElementById('pageNumber').focus();
      break;

    case 'Find':
      if (!this.supportsIntegratedFind) {
        this.findBar.toggle();
      }
      break;
  }
}, true);

window.addEventListener('presentationmodechanged', function (e) {
  var active = e.detail.active;
  var switchInProgress = e.detail.switchInProgress;
  PDFViewerApplication.pdfViewer.presentationModeState =
    switchInProgress ? PresentationModeState.CHANGING :
    active ? PresentationModeState.FULLSCREEN : PresentationModeState.NORMAL;
});

function updateViewarea() {
  if (!PDFViewerApplication.initialized) {
    return;
  }
  PDFViewerApplication.pdfViewer.update();
}

window.addEventListener('updateviewarea', function (evt) {
  if (!PDFViewerApplication.initialized) {
    return;
  }
  var location = evt.location;

  PDFViewerApplication.store.initializedPromise.then(function() {
    PDFViewerApplication.store.setMultiple({
      'exists': true,
      'page': location.pageNumber,
      'zoom': location.scale,
      'scrollLeft': location.left,
      'scrollTop': location.top
    }).catch(function() {
      // unable to write to storage
    });
  });
  var href =
    PDFViewerApplication.pdfLinkService.getAnchorUrl(location.pdfOpenParams);
  document.getElementById('viewBookmark').href = href;
  document.getElementById('secondaryViewBookmark').href = href;

  // Update the current bookmark in the browsing history.
  PDFViewerApplication.pdfHistory.updateCurrentBookmark(location.pdfOpenParams,
                                                        location.pageNumber);

  // Show/hide the loading indicator in the page number input element.
  var pageNumberInput = document.getElementById('pageNumber');
  var currentPage =
    PDFViewerApplication.pdfViewer.getPageView(PDFViewerApplication.page - 1);

  if (currentPage.renderingState === RenderingStates.FINISHED) {
    pageNumberInput.classList.remove(PAGE_NUMBER_LOADING_INDICATOR);
  } else {
    pageNumberInput.classList.add(PAGE_NUMBER_LOADING_INDICATOR);
  }
}, true);

window.addEventListener('resize', function webViewerResize(evt) {
  if (PDFViewerApplication.initialized &&
      (document.getElementById('pageAutoOption').selected ||
       /* Note: the scale is constant for |pageActualOption|. */
       document.getElementById('pageFitOption').selected ||
       document.getElementById('pageWidthOption').selected)) {
    var selectedScale = document.getElementById('scaleSelect').value;
    PDFViewerApplication.setScale(selectedScale, false);
  }
  updateViewarea();

  // Set the 'max-height' CSS property of the secondary toolbar.
  SecondaryToolbar.setMaxHeight(document.getElementById('viewerContainer'));
});

window.addEventListener('hashchange', function webViewerHashchange(evt) {
  if (PDFViewerApplication.pdfHistory.isHashChangeUnlocked) {
    var hash = document.location.hash.substring(1);
    if (!hash) {
      return;
    }
    if (!PDFViewerApplication.isInitialViewSet) {
      PDFViewerApplication.initialBookmark = hash;
    } else {
      PDFViewerApplication.pdfLinkService.setHash(hash);
    }
  }
});

window.addEventListener('change', function webViewerChange(evt) {
  var files = evt.target.files;
  if (!files || files.length === 0) {
    return;
  }
  var file = files[0];

  if (!PDFJS.disableCreateObjectURL &&
      typeof URL !== 'undefined' && URL.createObjectURL) {
    PDFViewerApplication.open(URL.createObjectURL(file), 0);
  } else {
    // Read the local file into a Uint8Array.
    var fileReader = new FileReader();
    fileReader.onload = function webViewerChangeFileReaderOnload(evt) {
      var buffer = evt.target.result;
      var uint8Array = new Uint8Array(buffer);
      PDFViewerApplication.open(uint8Array, 0);
    };
    fileReader.readAsArrayBuffer(file);
  }

  PDFViewerApplication.setTitleUsingUrl(file.name);

  // URL does not reflect proper document location - hiding some icons.
  document.getElementById('viewBookmark').setAttribute('hidden', 'true');
  document.getElementById('secondaryViewBookmark').
    setAttribute('hidden', 'true');
  document.getElementById('download').setAttribute('hidden', 'true');
  document.getElementById('secondaryDownload').setAttribute('hidden', 'true');
}, true);

function selectScaleOption(value) {
  var options = document.getElementById('scaleSelect').options;
  var predefinedValueFound = false;
  for (var i = 0; i < options.length; i++) {
    var option = options[i];
    if (option.value !== value) {
      option.selected = false;
      continue;
    }
    option.selected = true;
    predefinedValueFound = true;
  }
  return predefinedValueFound;
}

window.addEventListener('localized', function localized(evt) {
  document.getElementsByTagName('html')[0].dir = mozL10n.getDirection();

  PDFViewerApplication.animationStartedPromise.then(function() {
    // Adjust the width of the zoom box to fit the content.
    // Note: If the window is narrow enough that the zoom box is not visible,
    //       we temporarily show it to be able to adjust its width.
    var container = document.getElementById('scaleSelectContainer');
    if (container.clientWidth === 0) {
      container.setAttribute('style', 'display: inherit;');
    }
    if (container.clientWidth > 0) {
      var select = document.getElementById('scaleSelect');
      select.setAttribute('style', 'min-width: inherit;');
      var width = select.clientWidth + SCALE_SELECT_CONTAINER_PADDING;
      select.setAttribute('style', 'min-width: ' +
                                   (width + SCALE_SELECT_PADDING) + 'px;');
      container.setAttribute('style', 'min-width: ' + width + 'px; ' +
                                      'max-width: ' + width + 'px;');
    }

    // Set the 'max-height' CSS property of the secondary toolbar.
    SecondaryToolbar.setMaxHeight(document.getElementById('viewerContainer'));
  });
}, true);

window.addEventListener('scalechange', function scalechange(evt) {
  document.getElementById('zoomOut').disabled = (evt.scale === MIN_SCALE);
  document.getElementById('zoomIn').disabled = (evt.scale === MAX_SCALE);

  var customScaleOption = document.getElementById('customScaleOption');
  customScaleOption.selected = false;

  if (!PDFViewerApplication.updateScaleControls &&
      (document.getElementById('pageAutoOption').selected ||
       document.getElementById('pageActualOption').selected ||
       document.getElementById('pageFitOption').selected ||
       document.getElementById('pageWidthOption').selected)) {
    updateViewarea();
    return;
  }

  if (evt.presetValue) {
    selectScaleOption(evt.presetValue);
    updateViewarea();
    return;
  }

  var predefinedValueFound = selectScaleOption('' + evt.scale);
  if (!predefinedValueFound) {
    var customScale = Math.round(evt.scale * 10000) / 100;
    customScaleOption.textContent =
      mozL10n.get('page_scale_percent', { scale: customScale }, '{{scale}}%');
    customScaleOption.selected = true;
  }
  updateViewarea();
}, true);

window.addEventListener('pagechange', function pagechange(evt) {
  var page = evt.pageNumber;
  if (evt.previousPageNumber !== page) {
    document.getElementById('pageNumber').value = page;
    if (PDFViewerApplication.sidebarOpen) {
      PDFViewerApplication.pdfThumbnailViewer.scrollThumbnailIntoView(page);
    }
  }
  var numPages = PDFViewerApplication.pagesCount;

  document.getElementById('previous').disabled = (page <= 1);
  document.getElementById('next').disabled = (page >= numPages);

  document.getElementById('firstPage').disabled = (page <= 1);
  document.getElementById('lastPage').disabled = (page >= numPages);

  // we need to update stats
  if (PDFJS.pdfBug && Stats.enabled) {
    var pageView = PDFViewerApplication.pdfViewer.getPageView(page - 1);
    if (pageView.stats) {
      Stats.add(page, pageView.stats);
    }
  }

  // checking if the this.page was called from the updateViewarea function
  if (evt.updateInProgress) {
    return;
  }
  // Avoid scrolling the first page during loading
  if (this.loading && page === 1) {
    return;
  }
  PDFViewerApplication.pdfViewer.scrollPageIntoView(page);
}, true);

function handleMouseWheel(evt) {
  var MOUSE_WHEEL_DELTA_FACTOR = 40;
  var ticks = (evt.type === 'DOMMouseScroll') ? -evt.detail :
              evt.wheelDelta / MOUSE_WHEEL_DELTA_FACTOR;
  var direction = (ticks < 0) ? 'zoomOut' : 'zoomIn';

  if (PDFViewerApplication.pdfViewer.isInPresentationMode) {
    evt.preventDefault();
    PDFViewerApplication.scrollPresentationMode(ticks *
                                                MOUSE_WHEEL_DELTA_FACTOR);
  } else if (evt.ctrlKey || evt.metaKey) {
    // Only zoom the pages, not the entire viewer.
    evt.preventDefault();
    PDFViewerApplication[direction](Math.abs(ticks));
  }
}

window.addEventListener('DOMMouseScroll', handleMouseWheel);
window.addEventListener('mousewheel', handleMouseWheel);

window.addEventListener('click', function click(evt) {
  if (SecondaryToolbar.opened &&
      PDFViewerApplication.pdfViewer.containsElement(evt.target)) {
    SecondaryToolbar.close();
  }
}, false);

window.addEventListener('keydown', function keydown(evt) {
  if (OverlayManager.active) {
    return;
  }

  var handled = false;
  var cmd = (evt.ctrlKey ? 1 : 0) |
            (evt.altKey ? 2 : 0) |
            (evt.shiftKey ? 4 : 0) |
            (evt.metaKey ? 8 : 0);

  var pdfViewer = PDFViewerApplication.pdfViewer;
  var isViewerInPresentationMode = pdfViewer && pdfViewer.isInPresentationMode;

  // First, handle the key bindings that are independent whether an input
  // control is selected or not.
  if (cmd === 1 || cmd === 8 || cmd === 5 || cmd === 12) {
    // either CTRL or META key with optional SHIFT.
    switch (evt.keyCode) {
      case 70: // f
        if (!PDFViewerApplication.supportsIntegratedFind) {
          PDFViewerApplication.findBar.open();
          handled = true;
        }
        break;
      case 71: // g
        if (!PDFViewerApplication.supportsIntegratedFind) {
          PDFViewerApplication.findBar.dispatchEvent('again',
                                                     cmd === 5 || cmd === 12);
          handled = true;
        }
        break;
      case 61: // FF/Mac '='
      case 107: // FF '+' and '='
      case 187: // Chrome '+'
      case 171: // FF with German keyboard
        if (!isViewerInPresentationMode) {
          PDFViewerApplication.zoomIn();
        }
        handled = true;
        break;
      case 173: // FF/Mac '-'
      case 109: // FF '-'
      case 189: // Chrome '-'
        if (!isViewerInPresentationMode) {
          PDFViewerApplication.zoomOut();
        }
        handled = true;
        break;
      case 48: // '0'
      case 96: // '0' on Numpad of Swedish keyboard
        if (!isViewerInPresentationMode) {
          // keeping it unhandled (to restore page zoom to 100%)
          setTimeout(function () {
            // ... and resetting the scale after browser adjusts its scale
            PDFViewerApplication.setScale(DEFAULT_SCALE, true);
          });
          handled = false;
        }
        break;
    }
  }

  // CTRL or META without shift
  if (cmd === 1 || cmd === 8) {
    switch (evt.keyCode) {
      case 83: // s
        PDFViewerApplication.download();
        handled = true;
        break;
    }
  }

  // CTRL+ALT or Option+Command
  if (cmd === 3 || cmd === 10) {
    switch (evt.keyCode) {
      case 80: // p
        PDFViewerApplication.requestPresentationMode();
        handled = true;
        break;
      case 71: // g
        // focuses input#pageNumber field
        document.getElementById('pageNumber').select();
        handled = true;
        break;
    }
  }

  if (handled) {
    evt.preventDefault();
    return;
  }

  // Some shortcuts should not get handled if a control/input element
  // is selected.
  var curElement = document.activeElement || document.querySelector(':focus');
  var curElementTagName = curElement && curElement.tagName.toUpperCase();
  if (curElementTagName === 'INPUT' ||
      curElementTagName === 'TEXTAREA' ||
      curElementTagName === 'SELECT') {
    // Make sure that the secondary toolbar is closed when Escape is pressed.
    if (evt.keyCode !== 27) { // 'Esc'
      return;
    }
  }

  if (cmd === 0) { // no control key pressed at all.
    switch (evt.keyCode) {
      case 38: // up arrow
      case 33: // pg up
      case 8: // backspace
        if (!isViewerInPresentationMode &&
            PDFViewerApplication.currentScaleValue !== 'page-fit') {
          break;
        }
        /* in presentation mode */
        /* falls through */
      case 37: // left arrow
        // horizontal scrolling using arrow keys
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          break;
        }
        /* falls through */
      case 75: // 'k'
      case 80: // 'p'
        PDFViewerApplication.page--;
        handled = true;
        break;
      case 27: // esc key
        if (SecondaryToolbar.opened) {
          SecondaryToolbar.close();
          handled = true;
        }
        if (!PDFViewerApplication.supportsIntegratedFind &&
            PDFViewerApplication.findBar.opened) {
          PDFViewerApplication.findBar.close();
          handled = true;
        }
        break;
      case 40: // down arrow
      case 34: // pg down
      case 32: // spacebar
        if (!isViewerInPresentationMode &&
            PDFViewerApplication.currentScaleValue !== 'page-fit') {
          break;
        }
        /* falls through */
      case 39: // right arrow
        // horizontal scrolling using arrow keys
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          break;
        }
        /* falls through */
      case 74: // 'j'
      case 78: // 'n'
        PDFViewerApplication.page++;
        handled = true;
        break;

      case 36: // home
        if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {
          PDFViewerApplication.page = 1;
          handled = true;
        }
        break;
      case 35: // end
        if (isViewerInPresentationMode || (PDFViewerApplication.pdfDocument &&
            PDFViewerApplication.page < PDFViewerApplication.pagesCount)) {
          PDFViewerApplication.page = PDFViewerApplication.pagesCount;
          handled = true;
        }
        break;

      case 72: // 'h'
        if (!isViewerInPresentationMode) {
          HandTool.toggle();
        }
        break;
      case 82: // 'r'
        PDFViewerApplication.rotatePages(90);
        break;
    }
  }

  if (cmd === 4) { // shift-key
    switch (evt.keyCode) {
      case 32: // spacebar
        if (!isViewerInPresentationMode &&
            PDFViewerApplication.currentScaleValue !== 'page-fit') {
          break;
        }
        PDFViewerApplication.page--;
        handled = true;
        break;

      case 82: // 'r'
        PDFViewerApplication.rotatePages(-90);
        break;
    }
  }

  if (!handled && !isViewerInPresentationMode) {
    // 33=Page Up  34=Page Down  35=End    36=Home
    // 37=Left     38=Up         39=Right  40=Down
    if (evt.keyCode >= 33 && evt.keyCode <= 40 &&
        !pdfViewer.containsElement(curElement)) {
      // The page container is not focused, but a page navigation key has been
      // pressed. Change the focus to the viewer container to make sure that
      // navigation by keyboard works as expected.
      pdfViewer.focus();
    }
    // 32=Spacebar
    if (evt.keyCode === 32 && curElementTagName !== 'BUTTON' &&
        !pdfViewer.containsElement(curElement)) {
      pdfViewer.focus();
    }
  }

  if (cmd === 2) { // alt-key
    switch (evt.keyCode) {
      case 37: // left arrow
        if (isViewerInPresentationMode) {
          PDFViewerApplication.pdfHistory.back();
          handled = true;
        }
        break;
      case 39: // right arrow
        if (isViewerInPresentationMode) {
          PDFViewerApplication.pdfHistory.forward();
          handled = true;
        }
        break;
    }
  }

  if (handled) {
    evt.preventDefault();
  }
});

window.addEventListener('beforeprint', function beforePrint(evt) {
  PDFViewerApplication.beforePrint();
});

window.addEventListener('afterprint', function afterPrint(evt) {
  PDFViewerApplication.afterPrint();
});

(function animationStartedClosure() {
  // The offsetParent is not set until the pdf.js iframe or object is visible.
  // Waiting for first animation.
  PDFViewerApplication.animationStartedPromise = new Promise(
      function (resolve) {
    window.requestAnimationFrame(resolve);
  });
})();