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1x | /* Copyright 2017 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.
*/
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.FontLoader = exports.FontFaceObject = undefined;
var _util = require('../shared/util');
function FontLoader(docId) {
this.docId = docId;
this.styleElement = null;
this.nativeFontFaces = [];
this.loadTestFontId = 0;
this.loadingContext = {
requests: [],
nextRequestId: 0
};
}
FontLoader.prototype = {
insertRule: function fontLoaderInsertRule(rule) {
var styleElement = this.styleElement;
if (!styleElement) {
styleElement = this.styleElement = document.createElement('style');
styleElement.id = 'PDFJS_FONT_STYLE_TAG_' + this.docId;
document.documentElement.getElementsByTagName('head')[0].appendChild(styleElement);
}
var styleSheet = styleElement.sheet;
styleSheet.insertRule(rule, styleSheet.cssRules.length);
},
clear: function fontLoaderClear() {
Iif (this.styleElement) {
this.styleElement.remove();
this.styleElement = null;
}
this.nativeFontFaces.forEach(function (nativeFontFace) {
document.fonts.delete(nativeFontFace);
});
this.nativeFontFaces.length = 0;
}
};
{
var getLoadTestFont = function getLoadTestFont() {
return 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==');
};
Object.defineProperty(FontLoader.prototype, 'loadTestFont', {
get: function get() {
return (0, _util.shadow)(this, 'loadTestFont', getLoadTestFont());
},
configurable: true
});
FontLoader.prototype.addNativeFontFace = function fontLoader_addNativeFontFace(nativeFontFace) {
this.nativeFontFaces.push(nativeFontFace);
document.fonts.add(nativeFontFace);
};
FontLoader.prototype.bind = function fontLoaderBind(fonts, callback) {
var rules = [];
var fontsToLoad = [];
var fontLoadPromises = [];
var getNativeFontPromise = function getNativeFontPromise(nativeFontFace) {
return nativeFontFace.loaded.catch(function (e) {
(0, _util.warn)('Failed to load font "' + nativeFontFace.family + '": ' + e);
});
};
var isFontLoadingAPISupported = FontLoader.isFontLoadingAPISupported && !FontLoader.isSyncFontLoadingSupported;
for (var i = 0, ii = fonts.length; i < ii; i++) {
var font = fonts[i];
if (font.attached || font.loading === false) {
continue;
}
font.attached = true;
Iif (isFontLoadingAPISupported) {
var nativeFontFace = font.createNativeFontFace();
if (nativeFontFace) {
this.addNativeFontFace(nativeFontFace);
fontLoadPromises.push(getNativeFontPromise(nativeFontFace));
}
} else {
var rule = font.createFontFaceRule();
if (rule) {
this.insertRule(rule);
rules.push(rule);
fontsToLoad.push(font);
}
}
}
var request = this.queueLoadingCallback(callback);
Iif (isFontLoadingAPISupported) {
Promise.all(fontLoadPromises).then(function () {
request.complete();
});
} else Iif (rules.length > 0 && !FontLoader.isSyncFontLoadingSupported) {
this.prepareFontLoadEvent(rules, fontsToLoad, request);
} else {
request.complete();
}
};
FontLoader.prototype.queueLoadingCallback = function FontLoader_queueLoadingCallback(callback) {
function LoadLoader_completeRequest() {
(0, _util.assert)(!request.end, 'completeRequest() cannot be called twice');
request.end = Date.now();
while (context.requests.length > 0 && context.requests[0].end) {
var otherRequest = context.requests.shift();
setTimeout(otherRequest.callback, 0);
}
}
var context = this.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;
};
FontLoader.prototype.prepareFontLoadEvent = function fontLoaderPrepareFontLoadEvent(rules, fonts, request) {
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++;
if (called > 30) {
(0, _util.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++;
var data = this.loadTestFont;
var COMMENT_OFFSET = 976;
data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, loadTestFontId);
var CFF_CHECKSUM_OFFSET = 16;
var XXXX_VALUE = 0x58585858;
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) {
checksum = checksum - XXXX_VALUE + int32(loadTestFontId + 'XXX', i) | 0;
}
data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, (0, _util.string32)(checksum));
var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' + url + '}';
this.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();
});
};
}
{
FontLoader.isFontLoadingAPISupported = typeof document !== 'undefined' && !!document.fonts;
}
{
var isSyncFontLoadingSupported = function isSyncFontLoadingSupported() {
if (typeof navigator === 'undefined') {
return true;
}
var supported = false;
var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(navigator.userAgent);
if (m && m[1] >= 14) {
supported = true;
}
return supported;
};
Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', {
get: function get() {
return (0, _util.shadow)(FontLoader, 'isSyncFontLoadingSupported', isSyncFontLoadingSupported());
},
enumerable: true,
configurable: true
});
}
var IsEvalSupportedCached = {
get value() {
return (0, _util.shadow)(this, 'value', (0, _util.isEvalSupported)());
}
};
var FontFaceObject = function FontFaceObjectClosure() {
function FontFaceObject(translatedData, options) {
this.compiledGlyphs = Object.create(null);
for (var i in translatedData) {
this[i] = translatedData[i];
}
this.options = options;
}
FontFaceObject.prototype = {
createNativeFontFace: function FontFaceObject_createNativeFontFace() {
if (!this.data) {
return null;
}
if (this.options.disableFontFace) {
this.disableFontFace = true;
return null;
}
var nativeFontFace = new FontFace(this.loadedName, this.data, {});
if (this.options.fontRegistry) {
this.options.fontRegistry.registerFont(this);
}
return nativeFontFace;
},
createFontFaceRule: function FontFaceObject_createFontFaceRule() {
Iif (!this.data) {
return null;
}
Iif (this.options.disableFontFace) {
this.disableFontFace = true;
return null;
}
var data = (0, _util.bytesToString)(new Uint8Array(this.data));
var fontName = this.loadedName;
var url = 'url(data:' + this.mimetype + ';base64,' + btoa(data) + ');';
var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
if (this.options.fontRegistry) {
this.options.fontRegistry.registerFont(this, url);
}
return rule;
},
getPathGenerator: function FontFaceObject_getPathGenerator(objs, character) {
if (!(character in this.compiledGlyphs)) {
var cmds = objs.get(this.loadedName + '_path_' + character);
var current, i, len;
if (this.options.isEvalSupported && IsEvalSupportedCached.value) {
var args,
js = '';
for (i = 0, len = cmds.length; i < len; i++) {
current = cmds[i];
if (current.args !== undefined) {
args = current.args.join(',');
} else {
args = '';
}
js += 'c.' + current.cmd + '(' + args + ');\n';
}
this.compiledGlyphs[character] = new Function('c', 'size', js);
} else {
this.compiledGlyphs[character] = function (c, size) {
for (i = 0, len = cmds.length; i < len; i++) {
current = cmds[i];
if (current.cmd === 'scale') {
current.args = [size, -size];
}
c[current.cmd].apply(c, current.args);
}
};
}
}
return this.compiledGlyphs[character];
}
};
return FontFaceObject;
}();
exports.FontFaceObject = FontFaceObject;
exports.FontLoader = FontLoader; |