1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/webapps/WebappsIconHelpers.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,101 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +const DEFAULT_ICON_URL = "chrome://global/skin/icons/webapps-64.png";
1.9 +
1.10 +/**
1.11 + * This function receives a list of icon sizes
1.12 + * and URLs and returns the url string for the biggest icon.
1.13 + *
1.14 + * @param aIcons An object where the keys are the icon sizes
1.15 + * and the values are URL strings. E.g.:
1.16 + * aIcons = {
1.17 + * "16": "http://www.example.org/icon16.png",
1.18 + * "32": "http://www.example.org/icon32.png"
1.19 + * };
1.20 + *
1.21 + * @returns the URL string for the largest specified icon
1.22 + */
1.23 +function getBiggestIconURL(aIcons) {
1.24 + if (!aIcons) {
1.25 + return DEFAULT_ICON_URL;
1.26 + }
1.27 +
1.28 + let iconSizes = Object.keys(aIcons);
1.29 + if (iconSizes.length == 0) {
1.30 + return DEFAULT_ICON_URL;
1.31 + }
1.32 + iconSizes.sort(function(a, b) a - b);
1.33 + return aIcons[iconSizes.pop()];
1.34 +}
1.35 +
1.36 +// Download an icon using either a temp file or a pipe.
1.37 +function downloadIcon(aIconURI) {
1.38 + let deferred = Promise.defer();
1.39 +
1.40 + let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
1.41 + let mimeType;
1.42 + try {
1.43 + let tIndex = aIconURI.path.indexOf(";");
1.44 + if("data" == aIconURI.scheme && tIndex != -1) {
1.45 + mimeType = aIconURI.path.substring(0, tIndex);
1.46 + } else {
1.47 + mimeType = mimeService.getTypeFromURI(aIconURI);
1.48 + }
1.49 + } catch(e) {
1.50 + deferred.reject("Failed to determine icon MIME type: " + e);
1.51 + return deferred.promise;
1.52 + }
1.53 +
1.54 + function onIconDownloaded(aStatusCode, aIcon) {
1.55 + if (Components.isSuccessCode(aStatusCode)) {
1.56 + deferred.resolve([ mimeType, aIcon ]);
1.57 + } else {
1.58 + deferred.reject("Failure downloading icon: " + aStatusCode);
1.59 + }
1.60 + }
1.61 +
1.62 + try {
1.63 +#ifdef XP_MACOSX
1.64 + let downloadObserver = {
1.65 + onDownloadComplete: function(downloader, request, cx, aStatus, file) {
1.66 + onIconDownloaded(aStatus, file);
1.67 + }
1.68 + };
1.69 +
1.70 + let tmpIcon = Services.dirsvc.get("TmpD", Ci.nsIFile);
1.71 + tmpIcon.append("tmpicon." + mimeService.getPrimaryExtension(mimeType, ""));
1.72 + tmpIcon.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("666", 8));
1.73 +
1.74 + let listener = Cc["@mozilla.org/network/downloader;1"]
1.75 + .createInstance(Ci.nsIDownloader);
1.76 + listener.init(downloadObserver, tmpIcon);
1.77 +#else
1.78 + let pipe = Cc["@mozilla.org/pipe;1"]
1.79 + .createInstance(Ci.nsIPipe);
1.80 + pipe.init(true, true, 0, 0xffffffff, null);
1.81 +
1.82 + let listener = Cc["@mozilla.org/network/simple-stream-listener;1"]
1.83 + .createInstance(Ci.nsISimpleStreamListener);
1.84 + listener.init(pipe.outputStream, {
1.85 + onStartRequest: function() {},
1.86 + onStopRequest: function(aRequest, aContext, aStatusCode) {
1.87 + pipe.outputStream.close();
1.88 + onIconDownloaded(aStatusCode, pipe.inputStream);
1.89 + }
1.90 + });
1.91 +#endif
1.92 +
1.93 + let channel = NetUtil.newChannel(aIconURI);
1.94 + let { BadCertHandler } = Cu.import("resource://gre/modules/CertUtils.jsm", {});
1.95 + // Pass true to avoid optional redirect-cert-checking behavior.
1.96 + channel.notificationCallbacks = new BadCertHandler(true);
1.97 +
1.98 + channel.asyncOpen(listener, null);
1.99 + } catch(e) {
1.100 + deferred.reject("Failure initiating download of icon: " + e);
1.101 + }
1.102 +
1.103 + return deferred.promise;
1.104 +}
