a9ce4e8417
This moves/exposes the `URL` polyfill similarily to the existing `ReadableStream` polyfill, rather than exposing it globally, to avoid interfering with any "outside" code. Both the `URL` and `ReadableStream` polyfills are now exposed on the `pdfjsLib` object, such that they are accessible to the viewer components. Furthermore, the `no-restricted-globals` ESLint rule is also enabled to prevent accidental usage of the native `URL`/`ReadableStream` implementations directly in the `src/` and `web/` folders; see also https://eslint.org/docs/rules/no-restricted-globals Addresses the remaining TODO in https://github.com/mozilla/pdf.js/projects/6
64 lines
2.3 KiB
JavaScript
64 lines
2.3 KiB
JavaScript
/* Copyright 2018 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* eslint-disable no-restricted-globals */
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if (typeof PDFJSDev !== 'undefined' && !PDFJSDev.test('GENERIC')) {
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// The `URL` constructor is assumed to be available in the extension builds.
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exports.URL = URL;
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} else {
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let isURLSupported = false;
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try {
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if (typeof URL === 'function' && typeof URL.prototype === 'object' &&
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('origin' in URL.prototype)) {
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const u = new URL('b', 'http://a');
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u.pathname = 'c%20d';
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isURLSupported = (u.href === 'http://a/c%20d');
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}
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} catch (ex) {
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// The `URL` constructor cannot be used.
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}
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if (isURLSupported) {
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exports.URL = URL;
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} else {
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if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('IMAGE_DECODERS')) {
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class DummyURL {
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constructor() {
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throw new Error('The current image decoders doesn\'t utilize the ' +
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'`URL` constructor, hence it shouldn\'t need to be ' +
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'polyfilled for the IMAGE_DECODERS build target.');
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}
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}
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exports.URL = DummyURL;
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} else {
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const PolyfillURL = require('../../external/url/url-lib').URL;
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// Attempt to copy over the static methods.
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const OriginalURL = require('./global_scope').URL;
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if (OriginalURL) {
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PolyfillURL.createObjectURL = function(blob) {
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// IE extension allows a second optional options argument, see
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// http://msdn.microsoft.com/en-us/library/ie/hh772302(v=vs.85).aspx
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return OriginalURL.createObjectURL.apply(OriginalURL, arguments);
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};
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PolyfillURL.revokeObjectURL = function(url) {
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OriginalURL.revokeObjectURL(url);
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};
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}
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exports.URL = PolyfillURL;
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}
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}
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}
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