toolkit/webapps/WebappsIconHelpers.js@b8a032363ba2
toolkit/webapps/WebappsIconHelpers.js
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
5 const DEFAULT_ICON_URL = "chrome://global/skin/icons/webapps-64.png";
7 /**
8 * This function receives a list of icon sizes
9 * and URLs and returns the url string for the biggest icon.
10 *
11 * @param aIcons An object where the keys are the icon sizes
12 * and the values are URL strings. E.g.:
13 * aIcons = {
14 * "16": "http://www.example.org/icon16.png",
15 * "32": "http://www.example.org/icon32.png"
16 * };
17 *
18 * @returns the URL string for the largest specified icon
19 */
20 function getBiggestIconURL(aIcons) {
21 if (!aIcons) {
22 return DEFAULT_ICON_URL;
23 }
25 let iconSizes = Object.keys(aIcons);
26 if (iconSizes.length == 0) {
27 return DEFAULT_ICON_URL;
28 }
29 iconSizes.sort(function(a, b) a - b);
30 return aIcons[iconSizes.pop()];
31 }
33 // Download an icon using either a temp file or a pipe.
34 function downloadIcon(aIconURI) {
35 let deferred = Promise.defer();
37 let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
38 let mimeType;
39 try {
40 let tIndex = aIconURI.path.indexOf(";");
41 if("data" == aIconURI.scheme && tIndex != -1) {
42 mimeType = aIconURI.path.substring(0, tIndex);
43 } else {
44 mimeType = mimeService.getTypeFromURI(aIconURI);
45 }
46 } catch(e) {
47 deferred.reject("Failed to determine icon MIME type: " + e);
48 return deferred.promise;
49 }
51 function onIconDownloaded(aStatusCode, aIcon) {
52 if (Components.isSuccessCode(aStatusCode)) {
53 deferred.resolve([ mimeType, aIcon ]);
54 } else {
55 deferred.reject("Failure downloading icon: " + aStatusCode);
56 }
57 }
59 try {
60 #ifdef XP_MACOSX
61 let downloadObserver = {
62 onDownloadComplete: function(downloader, request, cx, aStatus, file) {
63 onIconDownloaded(aStatus, file);
64 }
65 };
67 let tmpIcon = Services.dirsvc.get("TmpD", Ci.nsIFile);
68 tmpIcon.append("tmpicon." + mimeService.getPrimaryExtension(mimeType, ""));
69 tmpIcon.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("666", 8));
71 let listener = Cc["@mozilla.org/network/downloader;1"]
72 .createInstance(Ci.nsIDownloader);
73 listener.init(downloadObserver, tmpIcon);
74 #else
75 let pipe = Cc["@mozilla.org/pipe;1"]
76 .createInstance(Ci.nsIPipe);
77 pipe.init(true, true, 0, 0xffffffff, null);
79 let listener = Cc["@mozilla.org/network/simple-stream-listener;1"]
80 .createInstance(Ci.nsISimpleStreamListener);
81 listener.init(pipe.outputStream, {
82 onStartRequest: function() {},
83 onStopRequest: function(aRequest, aContext, aStatusCode) {
84 pipe.outputStream.close();
85 onIconDownloaded(aStatusCode, pipe.inputStream);
86 }
87 });
88 #endif
90 let channel = NetUtil.newChannel(aIconURI);
91 let { BadCertHandler } = Cu.import("resource://gre/modules/CertUtils.jsm", {});
92 // Pass true to avoid optional redirect-cert-checking behavior.
93 channel.notificationCallbacks = new BadCertHandler(true);
95 channel.asyncOpen(listener, null);
96 } catch(e) {
97 deferred.reject("Failure initiating download of icon: " + e);
98 }
100 return deferred.promise;
101 }
