91 lines
3.1 KiB
JavaScript
91 lines
3.1 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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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/* globals URL, PDFJS */
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'use strict';
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var DownloadManager = (function DownloadManagerClosure() {
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function download(blobUrl, filename) {
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var a = document.createElement('a');
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if (a.click) {
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// Use a.click() if available. Otherwise, Chrome might show
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// "Unsafe JavaScript attempt to initiate a navigation change
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// for frame with URL" and not open the PDF at all.
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// Supported by (not mentioned = untested):
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// - Firefox 6 - 19 (4- does not support a.click, 5 ignores a.click)
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// - Chrome 19 - 26 (18- does not support a.click)
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// - Opera 9 - 12.15
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// - Internet Explorer 6 - 10
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// - Safari 6 (5.1- does not support a.click)
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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.parentNode.removeChild(a);
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} else {
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if (window.top === window &&
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blobUrl.split('#')[0] === window.location.href.split('#')[0]) {
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// If _parent == self, then opening an identical URL with different
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// location hash will only cause a navigation, not a download.
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var padCharacter = blobUrl.indexOf('?') === -1 ? '?' : '&';
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blobUrl = blobUrl.replace(/#|$/, padCharacter + '$&');
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}
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window.open(blobUrl, '_parent');
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}
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}
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function DownloadManager() {}
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DownloadManager.prototype = {
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downloadUrl: function DownloadManager_downloadUrl(url, filename) {
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if (!PDFJS.isValidUrl(url, true)) {
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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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download: function DownloadManager_download(blob, url, filename) {
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if (!URL) {
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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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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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var blobUrl = URL.createObjectURL(blob);
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download(blobUrl, filename);
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}
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};
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return DownloadManager;
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})();
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