diff options
Diffstat (limited to 'addons/website/static/lib/pdfjs/src/display/font_loader.js')
| -rw-r--r-- | addons/website/static/lib/pdfjs/src/display/font_loader.js | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/addons/website/static/lib/pdfjs/src/display/font_loader.js b/addons/website/static/lib/pdfjs/src/display/font_loader.js deleted file mode 100644 index 76b4f2486f7..00000000000 --- a/addons/website/static/lib/pdfjs/src/display/font_loader.js +++ /dev/null @@ -1,376 +0,0 @@ -/* -*- 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, shadow, isWorker, assert, warn, bytesToString, string32, - globalScope, FontFace, Promise */ - -'use strict'; - -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); - } -//#if !(MOZCENTRAL) - this.nativeFontFaces.forEach(function(nativeFontFace) { - document.fonts.delete(nativeFontFace); - }); - this.nativeFontFaces.length = 0; -//#endif - }, -//#if !(MOZCENTRAL) - 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 */ - } -//#else -//bind: function fontLoaderBind(fonts, callback) { -// assert(!isWorker, 'bind() shall be called from main thread'); -// -// for (var i = 0, ii = fonts.length; i < ii; i++) { -// var font = fonts[i]; -// if (font.attached) { -// continue; -// } -// -// font.attached = true; -// font.bindDOM() -// } -// -// setTimeout(callback); -//} -//#endif -}; - -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 = { -//#if !(MOZCENTRAL) - 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; - }, -//#endif - - 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; -})(); |