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
92 lines
2.8 KiB
JavaScript
92 lines
2.8 KiB
JavaScript
/* Copyright 2013 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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import {
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apiCompatibilityParams, createObjectURL, createValidAbsoluteUrl, URL
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} from 'pdfjs-lib';
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if (typeof PDFJSDev !== 'undefined' && !PDFJSDev.test('CHROME || GENERIC')) {
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throw new Error('Module "pdfjs-web/download_manager" shall not be used ' +
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'outside CHROME and GENERIC builds.');
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}
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const DISABLE_CREATE_OBJECT_URL =
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apiCompatibilityParams.disableCreateObjectURL || false;
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function download(blobUrl, filename) {
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let a = document.createElement('a');
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if (!a.click) {
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throw new Error('DownloadManager: "a.click()" is not supported.');
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}
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a.href = blobUrl;
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a.target = '_parent';
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// Use a.download if available. This increases the likelihood that
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// the file is downloaded instead of opened by another PDF plugin.
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if ('download' in a) {
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a.download = filename;
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}
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// <a> must be in the document for IE and recent Firefox versions,
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// otherwise .click() is ignored.
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(document.body || document.documentElement).appendChild(a);
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a.click();
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a.remove();
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}
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class DownloadManager {
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constructor({ disableCreateObjectURL = DISABLE_CREATE_OBJECT_URL, }) {
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this.disableCreateObjectURL = disableCreateObjectURL;
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}
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downloadUrl(url, filename) {
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if (!createValidAbsoluteUrl(url, 'http://example.com')) {
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return; // restricted/invalid URL
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}
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download(url + '#pdfjs.action=download', filename);
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}
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downloadData(data, filename, contentType) {
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if (navigator.msSaveBlob) { // IE10 and above
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return navigator.msSaveBlob(new Blob([data], { type: contentType, }),
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filename);
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}
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let blobUrl = createObjectURL(data, contentType,
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this.disableCreateObjectURL);
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download(blobUrl, filename);
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}
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download(blob, url, filename) {
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if (navigator.msSaveBlob) {
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// IE10 / IE11
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if (!navigator.msSaveBlob(blob, filename)) {
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this.downloadUrl(url, filename);
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}
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return;
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}
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if (this.disableCreateObjectURL) {
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// URL.createObjectURL is not supported
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this.downloadUrl(url, filename);
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return;
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}
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let blobUrl = URL.createObjectURL(blob);
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download(blobUrl, filename);
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}
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}
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export {
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DownloadManager,
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};
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