The Tor Browser / file comparison
comparison: toolkit/webapps/WebappsIconHelpers.js
toolkit/webapps/WebappsIconHelpers.js
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- 6474c204b198
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| 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/. */ | |
| 4 | |
| 5 const DEFAULT_ICON_URL = "chrome://global/skin/icons/webapps-64.png"; | |
| 6 | |
| 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 } | |
| 24 | |
| 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 } | |
| 32 | |
| 33 // Download an icon using either a temp file or a pipe. | |
| 34 function downloadIcon(aIconURI) { | |
| 35 let deferred = Promise.defer(); | |
| 36 | |
| 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 } | |
| 50 | |
| 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 } | |
| 58 | |
| 59 try { | |
| 60 #ifdef XP_MACOSX | |
| 61 let downloadObserver = { | |
| 62 onDownloadComplete: function(downloader, request, cx, aStatus, file) { | |
| 63 onIconDownloaded(aStatus, file); | |
| 64 } | |
| 65 }; | |
| 66 | |
| 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)); | |
| 70 | |
| 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); | |
| 78 | |
| 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 | |
| 89 | |
| 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); | |
| 94 | |
| 95 channel.asyncOpen(listener, null); | |
| 96 } catch(e) { | |
| 97 deferred.reject("Failure initiating download of icon: " + e); | |
| 98 } | |
| 99 | |
| 100 return deferred.promise; | |
| 101 } |
