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Diffstat (limited to 'public/vendor/plugins/pdfjs/web/compatibility.js')
-rw-r--r-- | public/vendor/plugins/pdfjs/web/compatibility.js | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/public/vendor/plugins/pdfjs/web/compatibility.js b/public/vendor/plugins/pdfjs/web/compatibility.js new file mode 100644 index 0000000000..1119a2742a --- /dev/null +++ b/public/vendor/plugins/pdfjs/web/compatibility.js @@ -0,0 +1,593 @@ +/* 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; + var createImageData = contextPrototype.createImageData; + contextPrototype.createImageData = function(w, h) { + var imageData = createImageData.call(this, w, h); + imageData.data.set = function(arr) { + for (var i = 0, ii = this.length; i < ii; i++) { + this[i] = arr[i]; + } + }; + return imageData; + }; + // this closure will be kept referenced, so clear its vars + contextPrototype = null; + } + } +})(); + +// 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; + } +})(); + +// Provides document.currentScript support +// Support: IE, Chrome<29. +(function checkCurrentScript() { + if ('currentScript' in document) { + return; + } + Object.defineProperty(document, 'currentScript', { + get: function () { + var scripts = document.getElementsByTagName('script'); + return scripts[scripts.length - 1]; + }, + enumerable: true, + configurable: true + }); +})(); |