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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /browser/components/preferences/in-content/applications.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+// Constants & Enumeration Values
+
+Components.utils.import('resource://gre/modules/Services.jsm');
+Components.utils.import('resource://gre/modules/AppConstants.jsm');
+const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
+const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
+const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
+const TYPE_PDF = "application/pdf";
+
+const PREF_PDFJS_DISABLED = "pdfjs.disabled";
+const TOPIC_PDFJS_HANDLER_CHANGED = "pdfjs:handlerChanged";
+
+const PREF_DISABLED_PLUGIN_TYPES = "plugin.disable_full_page_plugin_for_types";
+
+// Preferences that affect which entries to show in the list.
+const PREF_SHOW_PLUGINS_IN_LIST = "browser.download.show_plugins_in_list";
+const PREF_HIDE_PLUGINS_WITHOUT_EXTENSIONS =
+ "browser.download.hide_plugins_without_extensions";
+
+/*
+ * Preferences where we store handling information about the feed type.
+ *
+ * browser.feeds.handler
+ * - "bookmarks", "reader" (clarified further using the .default preference),
+ * or "ask" -- indicates the default handler being used to process feeds;
+ * "bookmarks" is obsolete; to specify that the handler is bookmarks,
+ * set browser.feeds.handler.default to "bookmarks";
+ *
+ * browser.feeds.handler.default
+ * - "bookmarks", "client" or "web" -- indicates the chosen feed reader used
+ * to display feeds, either transiently (i.e., when the "use as default"
+ * checkbox is unchecked, corresponds to when browser.feeds.handler=="ask")
+ * or more permanently (i.e., the item displayed in the dropdown in Feeds
+ * preferences)
+ *
+ * browser.feeds.handler.webservice
+ * - the URL of the currently selected web service used to read feeds
+ *
+ * browser.feeds.handlers.application
+ * - nsILocalFile, stores the current client-side feed reading app if one has
+ * been chosen
+ */
+const PREF_FEED_SELECTED_APP = "browser.feeds.handlers.application";
+const PREF_FEED_SELECTED_WEB = "browser.feeds.handlers.webservice";
+const PREF_FEED_SELECTED_ACTION = "browser.feeds.handler";
+const PREF_FEED_SELECTED_READER = "browser.feeds.handler.default";
+
+const PREF_VIDEO_FEED_SELECTED_APP = "browser.videoFeeds.handlers.application";
+const PREF_VIDEO_FEED_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
+const PREF_VIDEO_FEED_SELECTED_ACTION = "browser.videoFeeds.handler";
+const PREF_VIDEO_FEED_SELECTED_READER = "browser.videoFeeds.handler.default";
+
+const PREF_AUDIO_FEED_SELECTED_APP = "browser.audioFeeds.handlers.application";
+const PREF_AUDIO_FEED_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
+const PREF_AUDIO_FEED_SELECTED_ACTION = "browser.audioFeeds.handler";
+const PREF_AUDIO_FEED_SELECTED_READER = "browser.audioFeeds.handler.default";
+
+// The nsHandlerInfoAction enumeration values in nsIHandlerInfo identify
+// the actions the application can take with content of various types.
+// But since nsIHandlerInfo doesn't support plugins, there's no value
+// identifying the "use plugin" action, so we use this constant instead.
+const kActionUsePlugin = 5;
+
+const ICON_URL_APP = AppConstants.platform == "linux" ?
+ "moz-icon://dummy.exe?size=16" :
+ "chrome://browser/skin/preferences/application.png";
+
+// For CSS. Can be one of "ask", "save", "plugin" or "feed". If absent, the icon URL
+// was set by us to a custom handler icon and CSS should not try to override it.
+const APP_ICON_ATTR_NAME = "appHandlerIcon";
+
+// Utilities
+
+function getFileDisplayName(file) {
+ if (AppConstants.platform == "win") {
+ if (file instanceof Ci.nsILocalFileWin) {
+ try {
+ return file.getVersionInfoField("FileDescription");
+ } catch (e) {}
+ }
+ }
+ if (AppConstants.platform == "macosx") {
+ if (file instanceof Ci.nsILocalFileMac) {
+ try {
+ return file.bundleDisplayName;
+ } catch (e) {}
+ }
+ }
+ return file.leafName;
+}
+
+function getLocalHandlerApp(aFile) {
+ var localHandlerApp = Cc["@mozilla.org/uriloader/local-handler-app;1"].
+ createInstance(Ci.nsILocalHandlerApp);
+ localHandlerApp.name = getFileDisplayName(aFile);
+ localHandlerApp.executable = aFile;
+
+ return localHandlerApp;
+}
+
+/**
+ * An enumeration of items in a JS array.
+ *
+ * FIXME: use ArrayConverter once it lands (bug 380839).
+ *
+ * @constructor
+ */
+function ArrayEnumerator(aItems) {
+ this._index = 0;
+ this._contents = aItems;
+}
+
+ArrayEnumerator.prototype = {
+ _index: 0,
+
+ hasMoreElements: function() {
+ return this._index < this._contents.length;
+ },
+
+ getNext: function() {
+ return this._contents[this._index++];
+ }
+};
+
+function isFeedType(t) {
+ return t == TYPE_MAYBE_FEED || t == TYPE_MAYBE_VIDEO_FEED || t == TYPE_MAYBE_AUDIO_FEED;
+}
+
+// HandlerInfoWrapper
+
+/**
+ * This object wraps nsIHandlerInfo with some additional functionality
+ * the Applications prefpane needs to display and allow modification of
+ * the list of handled types.
+ *
+ * We create an instance of this wrapper for each entry we might display
+ * in the prefpane, and we compose the instances from various sources,
+ * including plugins and the handler service.
+ *
+ * We don't implement all the original nsIHandlerInfo functionality,
+ * just the stuff that the prefpane needs.
+ *
+ * In theory, all of the custom functionality in this wrapper should get
+ * pushed down into nsIHandlerInfo eventually.
+ */
+function HandlerInfoWrapper(aType, aHandlerInfo) {
+ this._type = aType;
+ this.wrappedHandlerInfo = aHandlerInfo;
+}
+
+HandlerInfoWrapper.prototype = {
+ // The wrapped nsIHandlerInfo object. In general, this object is private,
+ // but there are a couple cases where callers access it directly for things
+ // we haven't (yet?) implemented, so we make it a public property.
+ wrappedHandlerInfo: null,
+
+
+ // Convenience Utils
+
+ _handlerSvc: Cc["@mozilla.org/uriloader/handler-service;1"].
+ getService(Ci.nsIHandlerService),
+
+ _prefSvc: Cc["@mozilla.org/preferences-service;1"].
+ getService(Ci.nsIPrefBranch),
+
+ _categoryMgr: Cc["@mozilla.org/categorymanager;1"].
+ getService(Ci.nsICategoryManager),
+
+ element: function(aID) {
+ return document.getElementById(aID);
+ },
+
+
+ // nsIHandlerInfo
+
+ // The MIME type or protocol scheme.
+ _type: null,
+ get type() {
+ return this._type;
+ },
+
+ get description() {
+ if (this.wrappedHandlerInfo.description)
+ return this.wrappedHandlerInfo.description;
+
+ if (this.primaryExtension) {
+ var extension = this.primaryExtension.toUpperCase();
+ return this.element("bundlePreferences").getFormattedString("fileEnding",
+ [extension]);
+ }
+
+ return this.type;
+ },
+
+ get preferredApplicationHandler() {
+ return this.wrappedHandlerInfo.preferredApplicationHandler;
+ },
+
+ set preferredApplicationHandler(aNewValue) {
+ this.wrappedHandlerInfo.preferredApplicationHandler = aNewValue;
+
+ // Make sure the preferred handler is in the set of possible handlers.
+ if (aNewValue)
+ this.addPossibleApplicationHandler(aNewValue)
+ },
+
+ get possibleApplicationHandlers() {
+ return this.wrappedHandlerInfo.possibleApplicationHandlers;
+ },
+
+ addPossibleApplicationHandler: function(aNewHandler) {
+ var possibleApps = this.possibleApplicationHandlers.enumerate();
+ while (possibleApps.hasMoreElements()) {
+ if (possibleApps.getNext().equals(aNewHandler))
+ return;
+ }
+ this.possibleApplicationHandlers.appendElement(aNewHandler, false);
+ },
+
+ removePossibleApplicationHandler: function(aHandler) {
+ var defaultApp = this.preferredApplicationHandler;
+ if (defaultApp && aHandler.equals(defaultApp)) {
+ // If the app we remove was the default app, we must make sure
+ // it won't be used anymore
+ this.alwaysAskBeforeHandling = true;
+ this.preferredApplicationHandler = null;
+ }
+
+ var handlers = this.possibleApplicationHandlers;
+ for (var i = 0; i < handlers.length; ++i) {
+ var handler = handlers.queryElementAt(i, Ci.nsIHandlerApp);
+ if (handler.equals(aHandler)) {
+ handlers.removeElementAt(i);
+ break;
+ }
+ }
+ },
+
+ get hasDefaultHandler() {
+ return this.wrappedHandlerInfo.hasDefaultHandler;
+ },
+
+ get defaultDescription() {
+ return this.wrappedHandlerInfo.defaultDescription;
+ },
+
+ // What to do with content of this type.
+ get preferredAction() {
+ // If we have an enabled plugin, then the action is to use that plugin.
+ if (this.pluginName && !this.isDisabledPluginType)
+ return kActionUsePlugin;
+
+ // If the action is to use a helper app, but we don't have a preferred
+ // handler app, then switch to using the system default, if any; otherwise
+ // fall back to saving to disk, which is the default action in nsMIMEInfo.
+ // Note: "save to disk" is an invalid value for protocol info objects,
+ // but the alwaysAskBeforeHandling getter will detect that situation
+ // and always return true in that case to override this invalid value.
+ if (this.wrappedHandlerInfo.preferredAction == Ci.nsIHandlerInfo.useHelperApp &&
+ !gApplicationsPane.isValidHandlerApp(this.preferredApplicationHandler)) {
+ if (this.wrappedHandlerInfo.hasDefaultHandler)
+ return Ci.nsIHandlerInfo.useSystemDefault;
+ return Ci.nsIHandlerInfo.saveToDisk;
+ }
+
+ return this.wrappedHandlerInfo.preferredAction;
+ },
+
+ set preferredAction(aNewValue) {
+ // If the action is to use the plugin,
+ // we must set the preferred action to "save to disk".
+ // But only if it's not currently the preferred action.
+ if ((aNewValue == kActionUsePlugin) &&
+ (this.preferredAction != Ci.nsIHandlerInfo.saveToDisk)) {
+ aNewValue = Ci.nsIHandlerInfo.saveToDisk;
+ }
+
+ // We don't modify the preferred action if the new action is to use a plugin
+ // because handler info objects don't understand our custom "use plugin"
+ // value. Also, leaving it untouched means that we can automatically revert
+ // to the old setting if the user ever removes the plugin.
+
+ if (aNewValue != kActionUsePlugin)
+ this.wrappedHandlerInfo.preferredAction = aNewValue;
+ },
+
+ get alwaysAskBeforeHandling() {
+ // If this type is handled only by a plugin, we can't trust the value
+ // in the handler info object, since it'll be a default based on the absence
+ // of any user configuration, and the default in that case is to always ask,
+ // even though we never ask for content handled by a plugin, so special case
+ // plugin-handled types by returning false here.
+ if (this.pluginName && this.handledOnlyByPlugin)
+ return false;
+
+ // If this is a protocol type and the preferred action is "save to disk",
+ // which is invalid for such types, then return true here to override that
+ // action. This could happen when the preferred action is to use a helper
+ // app, but the preferredApplicationHandler is invalid, and there isn't
+ // a default handler, so the preferredAction getter returns save to disk
+ // instead.
+ if (!(this.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo) &&
+ this.preferredAction == Ci.nsIHandlerInfo.saveToDisk)
+ return true;
+
+ return this.wrappedHandlerInfo.alwaysAskBeforeHandling;
+ },
+
+ set alwaysAskBeforeHandling(aNewValue) {
+ this.wrappedHandlerInfo.alwaysAskBeforeHandling = aNewValue;
+ },
+
+
+ // nsIMIMEInfo
+
+ // The primary file extension associated with this type, if any.
+ //
+ // XXX Plugin objects contain an array of MimeType objects with "suffixes"
+ // properties; if this object has an associated plugin, shouldn't we check
+ // those properties for an extension?
+ get primaryExtension() {
+ try {
+ if (this.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo &&
+ this.wrappedHandlerInfo.primaryExtension)
+ return this.wrappedHandlerInfo.primaryExtension
+ } catch (ex) {}
+
+ return null;
+ },
+
+
+ // Plugin Handling
+
+ // A plugin that can handle this type, if any.
+ //
+ // Note: just because we have one doesn't mean it *will* handle the type.
+ // That depends on whether or not the type is in the list of types for which
+ // plugin handling is disabled.
+ plugin: null,
+
+ // Whether or not this type is only handled by a plugin or is also handled
+ // by some user-configured action as specified in the handler info object.
+ //
+ // Note: we can't just check if there's a handler info object for this type,
+ // because OS and user configuration is mixed up in the handler info object,
+ // so we always need to retrieve it for the OS info and can't tell whether
+ // it represents only OS-default information or user-configured information.
+ //
+ // FIXME: once handler info records are broken up into OS-provided records
+ // and user-configured records, stop using this boolean flag and simply
+ // check for the presence of a user-configured record to determine whether
+ // or not this type is only handled by a plugin. Filed as bug 395142.
+ handledOnlyByPlugin: undefined,
+
+ get isDisabledPluginType() {
+ return this._getDisabledPluginTypes().indexOf(this.type) != -1;
+ },
+
+ _getDisabledPluginTypes: function() {
+ var types = "";
+
+ if (this._prefSvc.prefHasUserValue(PREF_DISABLED_PLUGIN_TYPES))
+ types = this._prefSvc.getCharPref(PREF_DISABLED_PLUGIN_TYPES);
+
+ // Only split if the string isn't empty so we don't end up with an array
+ // containing a single empty string.
+ if (types != "")
+ return types.split(",");
+
+ return [];
+ },
+
+ disablePluginType: function() {
+ var disabledPluginTypes = this._getDisabledPluginTypes();
+
+ if (disabledPluginTypes.indexOf(this.type) == -1)
+ disabledPluginTypes.push(this.type);
+
+ this._prefSvc.setCharPref(PREF_DISABLED_PLUGIN_TYPES,
+ disabledPluginTypes.join(","));
+
+ // Update the category manager so existing browser windows update.
+ this._categoryMgr.deleteCategoryEntry("Gecko-Content-Viewers",
+ this.type,
+ false);
+ },
+
+ enablePluginType: function() {
+ var disabledPluginTypes = this._getDisabledPluginTypes();
+
+ var type = this.type;
+ disabledPluginTypes = disabledPluginTypes.filter(v => v != type);
+
+ this._prefSvc.setCharPref(PREF_DISABLED_PLUGIN_TYPES,
+ disabledPluginTypes.join(","));
+
+ // Update the category manager so existing browser windows update.
+ this._categoryMgr.
+ addCategoryEntry("Gecko-Content-Viewers",
+ this.type,
+ "@mozilla.org/content/plugin/document-loader-factory;1",
+ false,
+ true);
+ },
+
+
+ // Storage
+
+ store: function() {
+ this._handlerSvc.store(this.wrappedHandlerInfo);
+ },
+
+
+ // Icons
+
+ get smallIcon() {
+ return this._getIcon(16);
+ },
+
+ _getIcon: function(aSize) {
+ if (this.primaryExtension)
+ return "moz-icon://goat." + this.primaryExtension + "?size=" + aSize;
+
+ if (this.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo)
+ return "moz-icon://goat?size=" + aSize + "&contentType=" + this.type;
+
+ // FIXME: consider returning some generic icon when we can't get a URL for
+ // one (for example in the case of protocol schemes). Filed as bug 395141.
+ return null;
+ }
+
+};
+
+
+// Feed Handler Info
+
+/**
+ * This object implements nsIHandlerInfo for the feed types. It's a separate
+ * object because we currently store handling information for the feed type
+ * in a set of preferences rather than the nsIHandlerService-managed datastore.
+ *
+ * This object inherits from HandlerInfoWrapper in order to get functionality
+ * that isn't special to the feed type.
+ *
+ * XXX Should we inherit from HandlerInfoWrapper? After all, we override
+ * most of that wrapper's properties and methods, and we have to dance around
+ * the fact that the wrapper expects to have a wrappedHandlerInfo, which we
+ * don't provide.
+ */
+
+function FeedHandlerInfo(aMIMEType) {
+ HandlerInfoWrapper.call(this, aMIMEType, null);
+}
+
+FeedHandlerInfo.prototype = {
+ __proto__: HandlerInfoWrapper.prototype,
+
+ // Convenience Utils
+
+ _converterSvc:
+ Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
+ getService(Ci.nsIWebContentConverterService),
+
+ _shellSvc: AppConstants.HAVE_SHELL_SERVICE ? getShellService() : null,
+
+ // nsIHandlerInfo
+
+ get description() {
+ return this.element("bundlePreferences").getString(this._appPrefLabel);
+ },
+
+ get preferredApplicationHandler() {
+ switch (this.element(this._prefSelectedReader).value) {
+ case "client":
+ var file = this.element(this._prefSelectedApp).value;
+ if (file)
+ return getLocalHandlerApp(file);
+
+ return null;
+
+ case "web":
+ var uri = this.element(this._prefSelectedWeb).value;
+ if (!uri)
+ return null;
+ return this._converterSvc.getWebContentHandlerByURI(this.type, uri);
+
+ case "bookmarks":
+ default:
+ // When the pref is set to bookmarks, we handle feeds internally,
+ // we don't forward them to a local or web handler app, so there is
+ // no preferred handler.
+ return null;
+ }
+ },
+
+ set preferredApplicationHandler(aNewValue) {
+ if (aNewValue instanceof Ci.nsILocalHandlerApp) {
+ this.element(this._prefSelectedApp).value = aNewValue.executable;
+ this.element(this._prefSelectedReader).value = "client";
+ }
+ else if (aNewValue instanceof Ci.nsIWebContentHandlerInfo) {
+ this.element(this._prefSelectedWeb).value = aNewValue.uri;
+ this.element(this._prefSelectedReader).value = "web";
+ // Make the web handler be the new "auto handler" for feeds.
+ // Note: we don't have to unregister the auto handler when the user picks
+ // a non-web handler (local app, Live Bookmarks, etc.) because the service
+ // only uses the "auto handler" when the selected reader is a web handler.
+ // We also don't have to unregister it when the user turns on "always ask"
+ // (i.e. preview in browser), since that also overrides the auto handler.
+ this._converterSvc.setAutoHandler(this.type, aNewValue);
+ }
+ },
+
+ _possibleApplicationHandlers: null,
+
+ get possibleApplicationHandlers() {
+ if (this._possibleApplicationHandlers)
+ return this._possibleApplicationHandlers;
+
+ // A minimal implementation of nsIMutableArray. It only supports the two
+ // methods its callers invoke, namely appendElement and nsIArray::enumerate.
+ this._possibleApplicationHandlers = {
+ _inner: [],
+ _removed: [],
+
+ QueryInterface: function(aIID) {
+ if (aIID.equals(Ci.nsIMutableArray) ||
+ aIID.equals(Ci.nsIArray) ||
+ aIID.equals(Ci.nsISupports))
+ return this;
+
+ throw Cr.NS_ERROR_NO_INTERFACE;
+ },
+
+ get length() {
+ return this._inner.length;
+ },
+
+ enumerate: function() {
+ return new ArrayEnumerator(this._inner);
+ },
+
+ appendElement: function(aHandlerApp, aWeak) {
+ this._inner.push(aHandlerApp);
+ },
+
+ removeElementAt: function(aIndex) {
+ this._removed.push(this._inner[aIndex]);
+ this._inner.splice(aIndex, 1);
+ },
+
+ queryElementAt: function(aIndex, aInterface) {
+ return this._inner[aIndex].QueryInterface(aInterface);
+ }
+ };
+
+ // Add the selected local app if it's different from the OS default handler.
+ // Unlike for other types, we can store only one local app at a time for the
+ // feed type, since we store it in a preference that historically stores
+ // only a single path. But we display all the local apps the user chooses
+ // while the prefpane is open, only dropping the list when the user closes
+ // the prefpane, for maximum usability and consistency with other types.
+ var preferredAppFile = this.element(this._prefSelectedApp).value;
+ if (preferredAppFile) {
+ let preferredApp = getLocalHandlerApp(preferredAppFile);
+ let defaultApp = this._defaultApplicationHandler;
+ if (!defaultApp || !defaultApp.equals(preferredApp))
+ this._possibleApplicationHandlers.appendElement(preferredApp, false);
+ }
+
+ // Add the registered web handlers. There can be any number of these.
+ var webHandlers = this._converterSvc.getContentHandlers(this.type);
+ for (let webHandler of webHandlers)
+ this._possibleApplicationHandlers.appendElement(webHandler, false);
+
+ return this._possibleApplicationHandlers;
+ },
+
+ __defaultApplicationHandler: undefined,
+ get _defaultApplicationHandler() {
+ if (typeof this.__defaultApplicationHandler != "undefined")
+ return this.__defaultApplicationHandler;
+
+ var defaultFeedReader = null;
+ if (AppConstants.HAVE_SHELL_SERVICE) {
+ try {
+ defaultFeedReader = this._shellSvc.defaultFeedReader;
+ }
+ catch (ex) {
+ // no default reader or _shellSvc is null
+ }
+ }
+
+ if (defaultFeedReader) {
+ let handlerApp = Cc["@mozilla.org/uriloader/local-handler-app;1"].
+ createInstance(Ci.nsIHandlerApp);
+ handlerApp.name = getFileDisplayName(defaultFeedReader);
+ handlerApp.QueryInterface(Ci.nsILocalHandlerApp);
+ handlerApp.executable = defaultFeedReader;
+
+ this.__defaultApplicationHandler = handlerApp;
+ }
+ else {
+ this.__defaultApplicationHandler = null;
+ }
+
+ return this.__defaultApplicationHandler;
+ },
+
+ get hasDefaultHandler() {
+ if (AppConstants.HAVE_SHELL_SERVICE) {
+ try {
+ if (this._shellSvc.defaultFeedReader)
+ return true;
+ }
+ catch (ex) {
+ // no default reader or _shellSvc is null
+ }
+ }
+
+ return false;
+ },
+
+ get defaultDescription() {
+ if (this.hasDefaultHandler)
+ return this._defaultApplicationHandler.name;
+
+ // Should we instead return null?
+ return "";
+ },
+
+ // What to do with content of this type.
+ get preferredAction() {
+ switch (this.element(this._prefSelectedAction).value) {
+
+ case "bookmarks":
+ return Ci.nsIHandlerInfo.handleInternally;
+
+ case "reader": {
+ let preferredApp = this.preferredApplicationHandler;
+ let defaultApp = this._defaultApplicationHandler;
+
+ // If we have a valid preferred app, return useSystemDefault if it's
+ // the default app; otherwise return useHelperApp.
+ if (gApplicationsPane.isValidHandlerApp(preferredApp)) {
+ if (defaultApp && defaultApp.equals(preferredApp))
+ return Ci.nsIHandlerInfo.useSystemDefault;
+
+ return Ci.nsIHandlerInfo.useHelperApp;
+ }
+
+ // The pref is set to "reader", but we don't have a valid preferred app.
+ // What do we do now? Not sure this is the best option (perhaps we
+ // should direct the user to the default app, if any), but for now let's
+ // direct the user to live bookmarks.
+ return Ci.nsIHandlerInfo.handleInternally;
+ }
+
+ // If the action is "ask", then alwaysAskBeforeHandling will override
+ // the action, so it doesn't matter what we say it is, it just has to be
+ // something that doesn't cause the controller to hide the type.
+ case "ask":
+ default:
+ return Ci.nsIHandlerInfo.handleInternally;
+ }
+ },
+
+ set preferredAction(aNewValue) {
+ switch (aNewValue) {
+
+ case Ci.nsIHandlerInfo.handleInternally:
+ this.element(this._prefSelectedReader).value = "bookmarks";
+ break;
+
+ case Ci.nsIHandlerInfo.useHelperApp:
+ this.element(this._prefSelectedAction).value = "reader";
+ // The controller has already set preferredApplicationHandler
+ // to the new helper app.
+ break;
+
+ case Ci.nsIHandlerInfo.useSystemDefault:
+ this.element(this._prefSelectedAction).value = "reader";
+ this.preferredApplicationHandler = this._defaultApplicationHandler;
+ break;
+ }
+ },
+
+ get alwaysAskBeforeHandling() {
+ return this.element(this._prefSelectedAction).value == "ask";
+ },
+
+ set alwaysAskBeforeHandling(aNewValue) {
+ if (aNewValue == true)
+ this.element(this._prefSelectedAction).value = "ask";
+ else
+ this.element(this._prefSelectedAction).value = "reader";
+ },
+
+ // Whether or not we are currently storing the action selected by the user.
+ // We use this to suppress notification-triggered updates to the list when
+ // we make changes that may spawn such updates, specifically when we change
+ // the action for the feed type, which results in feed preference updates,
+ // which spawn "pref changed" notifications that would otherwise cause us
+ // to rebuild the view unnecessarily.
+ _storingAction: false,
+
+
+ // nsIMIMEInfo
+
+ get primaryExtension() {
+ return "xml";
+ },
+
+
+ // Storage
+
+ // Changes to the preferred action and handler take effect immediately
+ // (we write them out to the preferences right as they happen),
+ // so we when the controller calls store() after modifying the handlers,
+ // the only thing we need to store is the removal of possible handlers
+ // XXX Should we hold off on making the changes until this method gets called?
+ store: function() {
+ for (let app of this._possibleApplicationHandlers._removed) {
+ if (app instanceof Ci.nsILocalHandlerApp) {
+ let pref = this.element(PREF_FEED_SELECTED_APP);
+ var preferredAppFile = pref.value;
+ if (preferredAppFile) {
+ let preferredApp = getLocalHandlerApp(preferredAppFile);
+ if (app.equals(preferredApp))
+ pref.reset();
+ }
+ }
+ else {
+ app.QueryInterface(Ci.nsIWebContentHandlerInfo);
+ this._converterSvc.removeContentHandler(app.contentType, app.uri);
+ }
+ }
+ this._possibleApplicationHandlers._removed = [];
+ },
+
+
+ // Icons
+
+ get smallIcon() {
+ return this._smallIcon;
+ }
+
+};
+
+var feedHandlerInfo = {
+ __proto__: new FeedHandlerInfo(TYPE_MAYBE_FEED),
+ _prefSelectedApp: PREF_FEED_SELECTED_APP,
+ _prefSelectedWeb: PREF_FEED_SELECTED_WEB,
+ _prefSelectedAction: PREF_FEED_SELECTED_ACTION,
+ _prefSelectedReader: PREF_FEED_SELECTED_READER,
+ _smallIcon: "chrome://browser/skin/feeds/feedIcon16.png",
+ _appPrefLabel: "webFeed"
+}
+
+var videoFeedHandlerInfo = {
+ __proto__: new FeedHandlerInfo(TYPE_MAYBE_VIDEO_FEED),
+ _prefSelectedApp: PREF_VIDEO_FEED_SELECTED_APP,
+ _prefSelectedWeb: PREF_VIDEO_FEED_SELECTED_WEB,
+ _prefSelectedAction: PREF_VIDEO_FEED_SELECTED_ACTION,
+ _prefSelectedReader: PREF_VIDEO_FEED_SELECTED_READER,
+ _smallIcon: "chrome://browser/skin/feeds/videoFeedIcon16.png",
+ _appPrefLabel: "videoPodcastFeed"
+}
+
+var audioFeedHandlerInfo = {
+ __proto__: new FeedHandlerInfo(TYPE_MAYBE_AUDIO_FEED),
+ _prefSelectedApp: PREF_AUDIO_FEED_SELECTED_APP,
+ _prefSelectedWeb: PREF_AUDIO_FEED_SELECTED_WEB,
+ _prefSelectedAction: PREF_AUDIO_FEED_SELECTED_ACTION,
+ _prefSelectedReader: PREF_AUDIO_FEED_SELECTED_READER,
+ _smallIcon: "chrome://browser/skin/feeds/audioFeedIcon16.png",
+ _appPrefLabel: "audioPodcastFeed"
+}
+
+/**
+ * InternalHandlerInfoWrapper provides a basic mechanism to create an internal
+ * mime type handler that can be enabled/disabled in the applications preference
+ * menu.
+ */
+function InternalHandlerInfoWrapper(aMIMEType) {
+ var mimeSvc = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+ var handlerInfo = mimeSvc.getFromTypeAndExtension(aMIMEType, null);
+
+ HandlerInfoWrapper.call(this, aMIMEType, handlerInfo);
+}
+
+InternalHandlerInfoWrapper.prototype = {
+ __proto__: HandlerInfoWrapper.prototype,
+
+ // Override store so we so we can notify any code listening for registration
+ // or unregistration of this handler.
+ store: function() {
+ HandlerInfoWrapper.prototype.store.call(this);
+ Services.obs.notifyObservers(null, this._handlerChanged, null);
+ },
+
+ get enabled() {
+ throw Cr.NS_ERROR_NOT_IMPLEMENTED;
+ },
+
+ get description() {
+ return this.element("bundlePreferences").getString(this._appPrefLabel);
+ }
+};
+
+var pdfHandlerInfo = {
+ __proto__: new InternalHandlerInfoWrapper(TYPE_PDF),
+ _handlerChanged: TOPIC_PDFJS_HANDLER_CHANGED,
+ _appPrefLabel: "portableDocumentFormat",
+ get enabled() {
+ return !Services.prefs.getBoolPref(PREF_PDFJS_DISABLED);
+ },
+};
+
+
+// Prefpane Controller
+
+var gApplicationsPane = {
+ // The set of types the app knows how to handle. A hash of HandlerInfoWrapper
+ // objects, indexed by type.
+ _handledTypes: {},
+
+ // The list of types we can show, sorted by the sort column/direction.
+ // An array of HandlerInfoWrapper objects. We build this list when we first
+ // load the data and then rebuild it when users change a pref that affects
+ // what types we can show or change the sort column/direction.
+ // Note: this isn't necessarily the list of types we *will* show; if the user
+ // provides a filter string, we'll only show the subset of types in this list
+ // that match that string.
+ _visibleTypes: [],
+
+ // A count of the number of times each visible type description appears.
+ // We use these counts to determine whether or not to annotate descriptions
+ // with their types to distinguish duplicate descriptions from each other.
+ // A hash of integer counts, indexed by string description.
+ _visibleTypeDescriptionCount: {},
+
+
+ // Convenience & Performance Shortcuts
+
+ // These get defined by init().
+ _brandShortName : null,
+ _prefsBundle : null,
+ _list : null,
+ _filter : null,
+
+ _prefSvc : Cc["@mozilla.org/preferences-service;1"].
+ getService(Ci.nsIPrefBranch),
+
+ _mimeSvc : Cc["@mozilla.org/mime;1"].
+ getService(Ci.nsIMIMEService),
+
+ _helperAppSvc : Cc["@mozilla.org/uriloader/external-helper-app-service;1"].
+ getService(Ci.nsIExternalHelperAppService),
+
+ _handlerSvc : Cc["@mozilla.org/uriloader/handler-service;1"].
+ getService(Ci.nsIHandlerService),
+
+ _ioSvc : Cc["@mozilla.org/network/io-service;1"].
+ getService(Ci.nsIIOService),
+
+
+ // Initialization & Destruction
+
+ init: function() {
+ function setEventListener(aId, aEventType, aCallback)
+ {
+ document.getElementById(aId)
+ .addEventListener(aEventType, aCallback.bind(gApplicationsPane));
+ }
+
+ // Initialize shortcuts to some commonly accessed elements & values.
+ this._brandShortName =
+ document.getElementById("bundleBrand").getString("brandShortName");
+ this._prefsBundle = document.getElementById("bundlePreferences");
+ this._list = document.getElementById("handlersView");
+ this._filter = document.getElementById("filter");
+
+ // Observe preferences that influence what we display so we can rebuild
+ // the view when they change.
+ this._prefSvc.addObserver(PREF_SHOW_PLUGINS_IN_LIST, this, false);
+ this._prefSvc.addObserver(PREF_HIDE_PLUGINS_WITHOUT_EXTENSIONS, this, false);
+ this._prefSvc.addObserver(PREF_FEED_SELECTED_APP, this, false);
+ this._prefSvc.addObserver(PREF_FEED_SELECTED_WEB, this, false);
+ this._prefSvc.addObserver(PREF_FEED_SELECTED_ACTION, this, false);
+ this._prefSvc.addObserver(PREF_FEED_SELECTED_READER, this, false);
+
+ this._prefSvc.addObserver(PREF_VIDEO_FEED_SELECTED_APP, this, false);
+ this._prefSvc.addObserver(PREF_VIDEO_FEED_SELECTED_WEB, this, false);
+ this._prefSvc.addObserver(PREF_VIDEO_FEED_SELECTED_ACTION, this, false);
+ this._prefSvc.addObserver(PREF_VIDEO_FEED_SELECTED_READER, this, false);
+
+ this._prefSvc.addObserver(PREF_AUDIO_FEED_SELECTED_APP, this, false);
+ this._prefSvc.addObserver(PREF_AUDIO_FEED_SELECTED_WEB, this, false);
+ this._prefSvc.addObserver(PREF_AUDIO_FEED_SELECTED_ACTION, this, false);
+ this._prefSvc.addObserver(PREF_AUDIO_FEED_SELECTED_READER, this, false);
+
+
+ setEventListener("focusSearch1", "command", gApplicationsPane.focusFilterBox);
+ setEventListener("focusSearch2", "command", gApplicationsPane.focusFilterBox);
+ setEventListener("filter", "command", gApplicationsPane.filter);
+ setEventListener("handlersView", "select",
+ gApplicationsPane.onSelectionChanged);
+ setEventListener("typeColumn", "click", gApplicationsPane.sort);
+ setEventListener("actionColumn", "click", gApplicationsPane.sort);
+
+ // Listen for window unload so we can remove our preference observers.
+ window.addEventListener("unload", this, false);
+
+ // Figure out how we should be sorting the list. We persist sort settings
+ // across sessions, so we can't assume the default sort column/direction.
+ // XXX should we be using the XUL sort service instead?
+ if (document.getElementById("actionColumn").hasAttribute("sortDirection")) {
+ this._sortColumn = document.getElementById("actionColumn");
+ // The typeColumn element always has a sortDirection attribute,
+ // either because it was persisted or because the default value
+ // from the xul file was used. If we are sorting on the other
+ // column, we should remove it.
+ document.getElementById("typeColumn").removeAttribute("sortDirection");
+ }
+ else
+ this._sortColumn = document.getElementById("typeColumn");
+
+ // Load the data and build the list of handlers.
+ // By doing this in a timeout, we let the preferences dialog resize itself
+ // to an appropriate size before we add a bunch of items to the list.
+ // Otherwise, if there are many items, and the Applications prefpane
+ // is the one that gets displayed when the user first opens the dialog,
+ // the dialog might stretch too much in an attempt to fit them all in.
+ // XXX Shouldn't we perhaps just set a max-height on the richlistbox?
+ var _delayedPaneLoad = function(self) {
+ self._loadData();
+ self._rebuildVisibleTypes();
+ self._sortVisibleTypes();
+ self._rebuildView();
+
+ // Notify observers that the UI is now ready
+ Cc["@mozilla.org/observer-service;1"].getService(Ci.nsIObserverService).
+ notifyObservers(window, "app-handler-pane-loaded", null);
+ }
+ setTimeout(_delayedPaneLoad, 0, this);
+ },
+
+ destroy: function() {
+ window.removeEventListener("unload", this, false);
+ this._prefSvc.removeObserver(PREF_SHOW_PLUGINS_IN_LIST, this);
+ this._prefSvc.removeObserver(PREF_HIDE_PLUGINS_WITHOUT_EXTENSIONS, this);
+ this._prefSvc.removeObserver(PREF_FEED_SELECTED_APP, this);
+ this._prefSvc.removeObserver(PREF_FEED_SELECTED_WEB, this);
+ this._prefSvc.removeObserver(PREF_FEED_SELECTED_ACTION, this);
+ this._prefSvc.removeObserver(PREF_FEED_SELECTED_READER, this);
+
+ this._prefSvc.removeObserver(PREF_VIDEO_FEED_SELECTED_APP, this);
+ this._prefSvc.removeObserver(PREF_VIDEO_FEED_SELECTED_WEB, this);
+ this._prefSvc.removeObserver(PREF_VIDEO_FEED_SELECTED_ACTION, this);
+ this._prefSvc.removeObserver(PREF_VIDEO_FEED_SELECTED_READER, this);
+
+ this._prefSvc.removeObserver(PREF_AUDIO_FEED_SELECTED_APP, this);
+ this._prefSvc.removeObserver(PREF_AUDIO_FEED_SELECTED_WEB, this);
+ this._prefSvc.removeObserver(PREF_AUDIO_FEED_SELECTED_ACTION, this);
+ this._prefSvc.removeObserver(PREF_AUDIO_FEED_SELECTED_READER, this);
+ },
+
+
+ // nsISupports
+
+ QueryInterface: function(aIID) {
+ if (aIID.equals(Ci.nsIObserver) ||
+ aIID.equals(Ci.nsIDOMEventListener ||
+ aIID.equals(Ci.nsISupports)))
+ return this;
+
+ throw Cr.NS_ERROR_NO_INTERFACE;
+ },
+
+
+ // nsIObserver
+
+ observe: function (aSubject, aTopic, aData) {
+ // Rebuild the list when there are changes to preferences that influence
+ // whether or not to show certain entries in the list.
+ if (aTopic == "nsPref:changed" && !this._storingAction) {
+ // These two prefs alter the list of visible types, so we have to rebuild
+ // that list when they change.
+ if (aData == PREF_SHOW_PLUGINS_IN_LIST ||
+ aData == PREF_HIDE_PLUGINS_WITHOUT_EXTENSIONS) {
+ this._rebuildVisibleTypes();
+ this._sortVisibleTypes();
+ }
+
+ // All the prefs we observe can affect what we display, so we rebuild
+ // the view when any of them changes.
+ this._rebuildView();
+ }
+ },
+
+
+ // nsIDOMEventListener
+
+ handleEvent: function(aEvent) {
+ if (aEvent.type == "unload") {
+ this.destroy();
+ }
+ },
+
+
+ // Composed Model Construction
+
+ _loadData: function() {
+ this._loadFeedHandler();
+ this._loadInternalHandlers();
+ this._loadPluginHandlers();
+ this._loadApplicationHandlers();
+ },
+
+ _loadFeedHandler: function() {
+ this._handledTypes[TYPE_MAYBE_FEED] = feedHandlerInfo;
+ feedHandlerInfo.handledOnlyByPlugin = false;
+
+ this._handledTypes[TYPE_MAYBE_VIDEO_FEED] = videoFeedHandlerInfo;
+ videoFeedHandlerInfo.handledOnlyByPlugin = false;
+
+ this._handledTypes[TYPE_MAYBE_AUDIO_FEED] = audioFeedHandlerInfo;
+ audioFeedHandlerInfo.handledOnlyByPlugin = false;
+ },
+
+ /**
+ * Load higher level internal handlers so they can be turned on/off in the
+ * applications menu.
+ */
+ _loadInternalHandlers: function() {
+ var internalHandlers = [pdfHandlerInfo];
+ for (let internalHandler of internalHandlers) {
+ if (internalHandler.enabled) {
+ this._handledTypes[internalHandler.type] = internalHandler;
+ }
+ }
+ },
+
+ /**
+ * Load the set of handlers defined by plugins.
+ *
+ * Note: if there's more than one plugin for a given MIME type, we assume
+ * the last one is the one that the application will use. That may not be
+ * correct, but it's how we've been doing it for years.
+ *
+ * Perhaps we should instead query navigator.mimeTypes for the set of types
+ * supported by the application and then get the plugin from each MIME type's
+ * enabledPlugin property. But if there's a plugin for a type, we need
+ * to know about it even if it isn't enabled, since we're going to give
+ * the user an option to enable it.
+ *
+ * Also note that enabledPlugin does not get updated when
+ * plugin.disable_full_page_plugin_for_types changes, so even if we could use
+ * enabledPlugin to get the plugin that would be used, we'd still need to
+ * check the pref ourselves to find out if it's enabled.
+ */
+ _loadPluginHandlers: function() {
+ "use strict";
+
+ let mimeTypes = navigator.mimeTypes;
+
+ for (let mimeType of mimeTypes) {
+ let handlerInfoWrapper;
+ if (mimeType.type in this._handledTypes) {
+ handlerInfoWrapper = this._handledTypes[mimeType.type];
+ } else {
+ let wrappedHandlerInfo =
+ this._mimeSvc.getFromTypeAndExtension(mimeType.type, null);
+ handlerInfoWrapper = new HandlerInfoWrapper(mimeType.type, wrappedHandlerInfo);
+ handlerInfoWrapper.handledOnlyByPlugin = true;
+ this._handledTypes[mimeType.type] = handlerInfoWrapper;
+ }
+ handlerInfoWrapper.pluginName = mimeType.enabledPlugin.name;
+ }
+ },
+
+ /**
+ * Load the set of handlers defined by the application datastore.
+ */
+ _loadApplicationHandlers: function() {
+ var wrappedHandlerInfos = this._handlerSvc.enumerate();
+ while (wrappedHandlerInfos.hasMoreElements()) {
+ let wrappedHandlerInfo =
+ wrappedHandlerInfos.getNext().QueryInterface(Ci.nsIHandlerInfo);
+ let type = wrappedHandlerInfo.type;
+
+ let handlerInfoWrapper;
+ if (type in this._handledTypes)
+ handlerInfoWrapper = this._handledTypes[type];
+ else {
+ handlerInfoWrapper = new HandlerInfoWrapper(type, wrappedHandlerInfo);
+ this._handledTypes[type] = handlerInfoWrapper;
+ }
+
+ handlerInfoWrapper.handledOnlyByPlugin = false;
+ }
+ },
+
+
+ // View Construction
+
+ _rebuildVisibleTypes: function() {
+ // Reset the list of visible types and the visible type description counts.
+ this._visibleTypes = [];
+ this._visibleTypeDescriptionCount = {};
+
+ // Get the preferences that help determine what types to show.
+ var showPlugins = this._prefSvc.getBoolPref(PREF_SHOW_PLUGINS_IN_LIST);
+ var hidePluginsWithoutExtensions =
+ this._prefSvc.getBoolPref(PREF_HIDE_PLUGINS_WITHOUT_EXTENSIONS);
+
+ for (let type in this._handledTypes) {
+ let handlerInfo = this._handledTypes[type];
+
+ // Hide plugins without associated extensions if so prefed so we don't
+ // show a whole bunch of obscure types handled by plugins on Mac.
+ // Note: though protocol types don't have extensions, we still show them;
+ // the pref is only meant to be applied to MIME types, since plugins are
+ // only associated with MIME types.
+ // FIXME: should we also check the "suffixes" property of the plugin?
+ // Filed as bug 395135.
+ if (hidePluginsWithoutExtensions && handlerInfo.handledOnlyByPlugin &&
+ handlerInfo.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo &&
+ !handlerInfo.primaryExtension)
+ continue;
+
+ // Hide types handled only by plugins if so prefed.
+ if (handlerInfo.handledOnlyByPlugin && !showPlugins)
+ continue;
+
+ // We couldn't find any reason to exclude the type, so include it.
+ this._visibleTypes.push(handlerInfo);
+
+ if (handlerInfo.description in this._visibleTypeDescriptionCount)
+ this._visibleTypeDescriptionCount[handlerInfo.description]++;
+ else
+ this._visibleTypeDescriptionCount[handlerInfo.description] = 1;
+ }
+ },
+
+ _rebuildView: function() {
+ // Clear the list of entries.
+ while (this._list.childNodes.length > 1)
+ this._list.removeChild(this._list.lastChild);
+
+ var visibleTypes = this._visibleTypes;
+
+ // If the user is filtering the list, then only show matching types.
+ if (this._filter.value)
+ visibleTypes = visibleTypes.filter(this._matchesFilter, this);
+
+ for (let visibleType of visibleTypes) {
+ let item = document.createElement("richlistitem");
+ item.setAttribute("type", visibleType.type);
+ item.setAttribute("typeDescription", this._describeType(visibleType));
+ if (visibleType.smallIcon)
+ item.setAttribute("typeIcon", visibleType.smallIcon);
+ item.setAttribute("actionDescription",
+ this._describePreferredAction(visibleType));
+
+ if (!this._setIconClassForPreferredAction(visibleType, item)) {
+ item.setAttribute("actionIcon",
+ this._getIconURLForPreferredAction(visibleType));
+ }
+
+ this._list.appendChild(item);
+ }
+
+ this._selectLastSelectedType();
+ },
+
+ _matchesFilter: function(aType) {
+ var filterValue = this._filter.value.toLowerCase();
+ return this._describeType(aType).toLowerCase().indexOf(filterValue) != -1 ||
+ this._describePreferredAction(aType).toLowerCase().indexOf(filterValue) != -1;
+ },
+
+ /**
+ * Describe, in a human-readable fashion, the type represented by the given
+ * handler info object. Normally this is just the description provided by
+ * the info object, but if more than one object presents the same description,
+ * then we annotate the duplicate descriptions with the type itself to help
+ * users distinguish between those types.
+ *
+ * @param aHandlerInfo {nsIHandlerInfo} the type being described
+ * @returns {string} a description of the type
+ */
+ _describeType: function(aHandlerInfo) {
+ if (this._visibleTypeDescriptionCount[aHandlerInfo.description] > 1)
+ return this._prefsBundle.getFormattedString("typeDescriptionWithType",
+ [aHandlerInfo.description,
+ aHandlerInfo.type]);
+
+ return aHandlerInfo.description;
+ },
+
+ /**
+ * Describe, in a human-readable fashion, the preferred action to take on
+ * the type represented by the given handler info object.
+ *
+ * XXX Should this be part of the HandlerInfoWrapper interface? It would
+ * violate the separation of model and view, but it might make more sense
+ * nonetheless (f.e. it would make sortTypes easier).
+ *
+ * @param aHandlerInfo {nsIHandlerInfo} the type whose preferred action
+ * is being described
+ * @returns {string} a description of the action
+ */
+ _describePreferredAction: function(aHandlerInfo) {
+ // alwaysAskBeforeHandling overrides the preferred action, so if that flag
+ // is set, then describe that behavior instead. For most types, this is
+ // the "alwaysAsk" string, but for the feed type we show something special.
+ if (aHandlerInfo.alwaysAskBeforeHandling) {
+ if (isFeedType(aHandlerInfo.type))
+ return this._prefsBundle.getFormattedString("previewInApp",
+ [this._brandShortName]);
+ return this._prefsBundle.getString("alwaysAsk");
+ }
+
+ switch (aHandlerInfo.preferredAction) {
+ case Ci.nsIHandlerInfo.saveToDisk:
+ return this._prefsBundle.getString("saveFile");
+
+ case Ci.nsIHandlerInfo.useHelperApp:
+ var preferredApp = aHandlerInfo.preferredApplicationHandler;
+ var name;
+ if (preferredApp instanceof Ci.nsILocalHandlerApp)
+ name = getFileDisplayName(preferredApp.executable);
+ else
+ name = preferredApp.name;
+ return this._prefsBundle.getFormattedString("useApp", [name]);
+
+ case Ci.nsIHandlerInfo.handleInternally:
+ // For the feed type, handleInternally means live bookmarks.
+ if (isFeedType(aHandlerInfo.type)) {
+ return this._prefsBundle.getFormattedString("addLiveBookmarksInApp",
+ [this._brandShortName]);
+ }
+
+ if (aHandlerInfo instanceof InternalHandlerInfoWrapper) {
+ return this._prefsBundle.getFormattedString("previewInApp",
+ [this._brandShortName]);
+ }
+
+ // For other types, handleInternally looks like either useHelperApp
+ // or useSystemDefault depending on whether or not there's a preferred
+ // handler app.
+ if (this.isValidHandlerApp(aHandlerInfo.preferredApplicationHandler))
+ return aHandlerInfo.preferredApplicationHandler.name;
+
+ return aHandlerInfo.defaultDescription;
+
+ // XXX Why don't we say the app will handle the type internally?
+ // Is it because the app can't actually do that? But if that's true,
+ // then why would a preferredAction ever get set to this value
+ // in the first place?
+
+ case Ci.nsIHandlerInfo.useSystemDefault:
+ return this._prefsBundle.getFormattedString("useDefault",
+ [aHandlerInfo.defaultDescription]);
+
+ case kActionUsePlugin:
+ return this._prefsBundle.getFormattedString("usePluginIn",
+ [aHandlerInfo.pluginName,
+ this._brandShortName]);
+ default:
+ throw new Error(`Unexpected preferredAction: ${aHandlerInfo.preferredAction}`);
+ }
+ },
+
+ _selectLastSelectedType: function() {
+ // If the list is disabled by the pref.downloads.disable_button.edit_actions
+ // preference being locked, then don't select the type, as that would cause
+ // it to appear selected, with a different background and an actions menu
+ // that makes it seem like you can choose an action for the type.
+ if (this._list.disabled)
+ return;
+
+ var lastSelectedType = this._list.getAttribute("lastSelectedType");
+ if (!lastSelectedType)
+ return;
+
+ var item = this._list.getElementsByAttribute("type", lastSelectedType)[0];
+ if (!item)
+ return;
+
+ this._list.selectedItem = item;
+ },
+
+ /**
+ * Whether or not the given handler app is valid.
+ *
+ * @param aHandlerApp {nsIHandlerApp} the handler app in question
+ *
+ * @returns {boolean} whether or not it's valid
+ */
+ isValidHandlerApp: function(aHandlerApp) {
+ if (!aHandlerApp)
+ return false;
+
+ if (aHandlerApp instanceof Ci.nsILocalHandlerApp)
+ return this._isValidHandlerExecutable(aHandlerApp.executable);
+
+ if (aHandlerApp instanceof Ci.nsIWebHandlerApp)
+ return aHandlerApp.uriTemplate;
+
+ if (aHandlerApp instanceof Ci.nsIWebContentHandlerInfo)
+ return aHandlerApp.uri;
+
+ return false;
+ },
+
+ _isValidHandlerExecutable: function(aExecutable) {
+ let leafName;
+ if (AppConstants.platform == "win") {
+ leafName = `${AppConstants.MOZ_APP_NAME}.exe`;
+ } else if (AppConstants.platform == "macosx") {
+ leafName = AppConstants.MOZ_MACBUNDLE_NAME;
+ } else {
+ leafName = `${AppConstants.MOZ_APP_NAME}-bin`;
+ }
+ return aExecutable &&
+ aExecutable.exists() &&
+ aExecutable.isExecutable() &&
+// XXXben - we need to compare this with the running instance executable
+// just don't know how to do that via script...
+// XXXmano TBD: can probably add this to nsIShellService
+ aExecutable.leafName != leafName;
+ },
+
+ /**
+ * Rebuild the actions menu for the selected entry. Gets called by
+ * the richlistitem constructor when an entry in the list gets selected.
+ */
+ rebuildActionsMenu: function() {
+ var typeItem = this._list.selectedItem;
+ var handlerInfo = this._handledTypes[typeItem.type];
+ var menu =
+ document.getAnonymousElementByAttribute(typeItem, "class", "actionsMenu");
+ var menuPopup = menu.menupopup;
+
+ // Clear out existing items.
+ while (menuPopup.hasChildNodes())
+ menuPopup.removeChild(menuPopup.lastChild);
+
+ // Add the "Preview in Firefox" option for optional internal handlers.
+ if (handlerInfo instanceof InternalHandlerInfoWrapper) {
+ let internalMenuItem = document.createElement("menuitem");
+ internalMenuItem.setAttribute("action", Ci.nsIHandlerInfo.handleInternally);
+ let label = this._prefsBundle.getFormattedString("previewInApp",
+ [this._brandShortName]);
+ internalMenuItem.setAttribute("label", label);
+ internalMenuItem.setAttribute("tooltiptext", label);
+ internalMenuItem.setAttribute(APP_ICON_ATTR_NAME, "ask");
+ menuPopup.appendChild(internalMenuItem);
+ }
+
+ {
+ var askMenuItem = document.createElement("menuitem");
+ askMenuItem.setAttribute("action", Ci.nsIHandlerInfo.alwaysAsk);
+ let label;
+ if (isFeedType(handlerInfo.type))
+ label = this._prefsBundle.getFormattedString("previewInApp",
+ [this._brandShortName]);
+ else
+ label = this._prefsBundle.getString("alwaysAsk");
+ askMenuItem.setAttribute("label", label);
+ askMenuItem.setAttribute("tooltiptext", label);
+ askMenuItem.setAttribute(APP_ICON_ATTR_NAME, "ask");
+ menuPopup.appendChild(askMenuItem);
+ }
+
+ // Create a menu item for saving to disk.
+ // Note: this option isn't available to protocol types, since we don't know
+ // what it means to save a URL having a certain scheme to disk, nor is it
+ // available to feeds, since the feed code doesn't implement the capability.
+ if ((handlerInfo.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo) &&
+ !isFeedType(handlerInfo.type)) {
+ var saveMenuItem = document.createElement("menuitem");
+ saveMenuItem.setAttribute("action", Ci.nsIHandlerInfo.saveToDisk);
+ let label = this._prefsBundle.getString("saveFile");
+ saveMenuItem.setAttribute("label", label);
+ saveMenuItem.setAttribute("tooltiptext", label);
+ saveMenuItem.setAttribute(APP_ICON_ATTR_NAME, "save");
+ menuPopup.appendChild(saveMenuItem);
+ }
+
+ // If this is the feed type, add a Live Bookmarks item.
+ if (isFeedType(handlerInfo.type)) {
+ let internalMenuItem = document.createElement("menuitem");
+ internalMenuItem.setAttribute("action", Ci.nsIHandlerInfo.handleInternally);
+ let label = this._prefsBundle.getFormattedString("addLiveBookmarksInApp",
+ [this._brandShortName]);
+ internalMenuItem.setAttribute("label", label);
+ internalMenuItem.setAttribute("tooltiptext", label);
+ internalMenuItem.setAttribute(APP_ICON_ATTR_NAME, "feed");
+ menuPopup.appendChild(internalMenuItem);
+ }
+
+ // Add a separator to distinguish these items from the helper app items
+ // that follow them.
+ let menuItem = document.createElement("menuseparator");
+ menuPopup.appendChild(menuItem);
+
+ // Create a menu item for the OS default application, if any.
+ if (handlerInfo.hasDefaultHandler) {
+ var defaultMenuItem = document.createElement("menuitem");
+ defaultMenuItem.setAttribute("action", Ci.nsIHandlerInfo.useSystemDefault);
+ let label = this._prefsBundle.getFormattedString("useDefault",
+ [handlerInfo.defaultDescription]);
+ defaultMenuItem.setAttribute("label", label);
+ defaultMenuItem.setAttribute("tooltiptext", handlerInfo.defaultDescription);
+ defaultMenuItem.setAttribute("image", this._getIconURLForSystemDefault(handlerInfo));
+
+ menuPopup.appendChild(defaultMenuItem);
+ }
+
+ // Create menu items for possible handlers.
+ let preferredApp = handlerInfo.preferredApplicationHandler;
+ let possibleApps = handlerInfo.possibleApplicationHandlers.enumerate();
+ var possibleAppMenuItems = [];
+ while (possibleApps.hasMoreElements()) {
+ let possibleApp = possibleApps.getNext();
+ if (!this.isValidHandlerApp(possibleApp))
+ continue;
+
+ let menuItem = document.createElement("menuitem");
+ menuItem.setAttribute("action", Ci.nsIHandlerInfo.useHelperApp);
+ let label;
+ if (possibleApp instanceof Ci.nsILocalHandlerApp)
+ label = getFileDisplayName(possibleApp.executable);
+ else
+ label = possibleApp.name;
+ label = this._prefsBundle.getFormattedString("useApp", [label]);
+ menuItem.setAttribute("label", label);
+ menuItem.setAttribute("tooltiptext", label);
+ menuItem.setAttribute("image", this._getIconURLForHandlerApp(possibleApp));
+
+ // Attach the handler app object to the menu item so we can use it
+ // to make changes to the datastore when the user selects the item.
+ menuItem.handlerApp = possibleApp;
+
+ menuPopup.appendChild(menuItem);
+ possibleAppMenuItems.push(menuItem);
+ }
+
+ // Create a menu item for the plugin.
+ if (handlerInfo.pluginName) {
+ var pluginMenuItem = document.createElement("menuitem");
+ pluginMenuItem.setAttribute("action", kActionUsePlugin);
+ let label = this._prefsBundle.getFormattedString("usePluginIn",
+ [handlerInfo.pluginName,
+ this._brandShortName]);
+ pluginMenuItem.setAttribute("label", label);
+ pluginMenuItem.setAttribute("tooltiptext", label);
+ pluginMenuItem.setAttribute(APP_ICON_ATTR_NAME, "plugin");
+ menuPopup.appendChild(pluginMenuItem);
+ }
+
+ // Create a menu item for selecting a local application.
+ let canOpenWithOtherApp = true;
+ if (AppConstants.platform == "win") {
+ // On Windows, selecting an application to open another application
+ // would be meaningless so we special case executables.
+ let executableType = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService)
+ .getTypeFromExtension("exe");
+ canOpenWithOtherApp = handlerInfo.type != executableType;
+ }
+ if (canOpenWithOtherApp)
+ {
+ let menuItem = document.createElement("menuitem");
+ menuItem.className = "choose-app-item";
+ menuItem.addEventListener("command", function(e) {
+ gApplicationsPane.chooseApp(e);
+ });
+ let label = this._prefsBundle.getString("useOtherApp");
+ menuItem.setAttribute("label", label);
+ menuItem.setAttribute("tooltiptext", label);
+ menuPopup.appendChild(menuItem);
+ }
+
+ // Create a menu item for managing applications.
+ if (possibleAppMenuItems.length) {
+ let menuItem = document.createElement("menuseparator");
+ menuPopup.appendChild(menuItem);
+ menuItem = document.createElement("menuitem");
+ menuItem.className = "manage-app-item";
+ menuItem.addEventListener("command", function(e) {
+ gApplicationsPane.manageApp(e);
+ });
+ menuItem.setAttribute("label", this._prefsBundle.getString("manageApp"));
+ menuPopup.appendChild(menuItem);
+ }
+
+ // Select the item corresponding to the preferred action. If the always
+ // ask flag is set, it overrides the preferred action. Otherwise we pick
+ // the item identified by the preferred action (when the preferred action
+ // is to use a helper app, we have to pick the specific helper app item).
+ if (handlerInfo.alwaysAskBeforeHandling)
+ menu.selectedItem = askMenuItem;
+ else switch (handlerInfo.preferredAction) {
+ case Ci.nsIHandlerInfo.handleInternally:
+ menu.selectedItem = internalMenuItem;
+ break;
+ case Ci.nsIHandlerInfo.useSystemDefault:
+ menu.selectedItem = defaultMenuItem;
+ break;
+ case Ci.nsIHandlerInfo.useHelperApp:
+ if (preferredApp)
+ menu.selectedItem =
+ possibleAppMenuItems.filter(v => v.handlerApp.equals(preferredApp))[0];
+ break;
+ case kActionUsePlugin:
+ menu.selectedItem = pluginMenuItem;
+ break;
+ case Ci.nsIHandlerInfo.saveToDisk:
+ menu.selectedItem = saveMenuItem;
+ break;
+ }
+ },
+
+
+ // Sorting & Filtering
+
+ _sortColumn: null,
+
+ /**
+ * Sort the list when the user clicks on a column header.
+ */
+ sort: function (event) {
+ var column = event.target;
+
+ // If the user clicked on a new sort column, remove the direction indicator
+ // from the old column.
+ if (this._sortColumn && this._sortColumn != column)
+ this._sortColumn.removeAttribute("sortDirection");
+
+ this._sortColumn = column;
+
+ // Set (or switch) the sort direction indicator.
+ if (column.getAttribute("sortDirection") == "ascending")
+ column.setAttribute("sortDirection", "descending");
+ else
+ column.setAttribute("sortDirection", "ascending");
+
+ this._sortVisibleTypes();
+ this._rebuildView();
+ },
+
+ /**
+ * Sort the list of visible types by the current sort column/direction.
+ */
+ _sortVisibleTypes: function() {
+ if (!this._sortColumn)
+ return;
+
+ var t = this;
+
+ function sortByType(a, b) {
+ return t._describeType(a).toLowerCase().
+ localeCompare(t._describeType(b).toLowerCase());
+ }
+
+ function sortByAction(a, b) {
+ return t._describePreferredAction(a).toLowerCase().
+ localeCompare(t._describePreferredAction(b).toLowerCase());
+ }
+
+ switch (this._sortColumn.getAttribute("value")) {
+ case "type":
+ this._visibleTypes.sort(sortByType);
+ break;
+ case "action":
+ this._visibleTypes.sort(sortByAction);
+ break;
+ }
+
+ if (this._sortColumn.getAttribute("sortDirection") == "descending")
+ this._visibleTypes.reverse();
+ },
+
+ /**
+ * Filter the list when the user enters a filter term into the filter field.
+ */
+ filter: function() {
+ this._rebuildView();
+ },
+
+ focusFilterBox: function() {
+ this._filter.focus();
+ this._filter.select();
+ },
+
+
+ // Changes
+
+ onSelectAction: function(aActionItem) {
+ this._storingAction = true;
+
+ try {
+ this._storeAction(aActionItem);
+ }
+ finally {
+ this._storingAction = false;
+ }
+ },
+
+ _storeAction: function(aActionItem) {
+ var typeItem = this._list.selectedItem;
+ var handlerInfo = this._handledTypes[typeItem.type];
+
+ let action = parseInt(aActionItem.getAttribute("action"));
+
+ // Set the plugin state if we're enabling or disabling a plugin.
+ if (action == kActionUsePlugin)
+ handlerInfo.enablePluginType();
+ else if (handlerInfo.pluginName && !handlerInfo.isDisabledPluginType)
+ handlerInfo.disablePluginType();
+
+ // Set the preferred application handler.
+ // We leave the existing preferred app in the list when we set
+ // the preferred action to something other than useHelperApp so that
+ // legacy datastores that don't have the preferred app in the list
+ // of possible apps still include the preferred app in the list of apps
+ // the user can choose to handle the type.
+ if (action == Ci.nsIHandlerInfo.useHelperApp)
+ handlerInfo.preferredApplicationHandler = aActionItem.handlerApp;
+
+ // Set the "always ask" flag.
+ if (action == Ci.nsIHandlerInfo.alwaysAsk)
+ handlerInfo.alwaysAskBeforeHandling = true;
+ else
+ handlerInfo.alwaysAskBeforeHandling = false;
+
+ // Set the preferred action.
+ handlerInfo.preferredAction = action;
+
+ handlerInfo.store();
+
+ // Make sure the handler info object is flagged to indicate that there is
+ // now some user configuration for the type.
+ handlerInfo.handledOnlyByPlugin = false;
+
+ // Update the action label and image to reflect the new preferred action.
+ typeItem.setAttribute("actionDescription",
+ this._describePreferredAction(handlerInfo));
+ if (!this._setIconClassForPreferredAction(handlerInfo, typeItem)) {
+ typeItem.setAttribute("actionIcon",
+ this._getIconURLForPreferredAction(handlerInfo));
+ }
+ },
+
+ manageApp: function(aEvent) {
+ // Don't let the normal "on select action" handler get this event,
+ // as we handle it specially ourselves.
+ aEvent.stopPropagation();
+
+ var typeItem = this._list.selectedItem;
+ var handlerInfo = this._handledTypes[typeItem.type];
+
+ let onComplete = () => {
+ // Rebuild the actions menu so that we revert to the previous selection,
+ // or "Always ask" if the previous default application has been removed
+ this.rebuildActionsMenu();
+
+ // update the richlistitem too. Will be visible when selecting another row
+ typeItem.setAttribute("actionDescription",
+ this._describePreferredAction(handlerInfo));
+ if (!this._setIconClassForPreferredAction(handlerInfo, typeItem)) {
+ typeItem.setAttribute("actionIcon",
+ this._getIconURLForPreferredAction(handlerInfo));
+ }
+ };
+
+ gSubDialog.open("chrome://browser/content/preferences/applicationManager.xul",
+ "resizable=no", handlerInfo, onComplete);
+
+ },
+
+ chooseApp: function(aEvent) {
+ // Don't let the normal "on select action" handler get this event,
+ // as we handle it specially ourselves.
+ aEvent.stopPropagation();
+
+ var handlerApp;
+ let chooseAppCallback = function(aHandlerApp) {
+ // Rebuild the actions menu whether the user picked an app or canceled.
+ // If they picked an app, we want to add the app to the menu and select it.
+ // If they canceled, we want to go back to their previous selection.
+ this.rebuildActionsMenu();
+
+ // If the user picked a new app from the menu, select it.
+ if (aHandlerApp) {
+ let typeItem = this._list.selectedItem;
+ let actionsMenu =
+ document.getAnonymousElementByAttribute(typeItem, "class", "actionsMenu");
+ let menuItems = actionsMenu.menupopup.childNodes;
+ for (let i = 0; i < menuItems.length; i++) {
+ let menuItem = menuItems[i];
+ if (menuItem.handlerApp && menuItem.handlerApp.equals(aHandlerApp)) {
+ actionsMenu.selectedIndex = i;
+ this.onSelectAction(menuItem);
+ break;
+ }
+ }
+ }
+ }.bind(this);
+
+ if (AppConstants.platform == "win") {
+ var params = {};
+ var handlerInfo = this._handledTypes[this._list.selectedItem.type];
+
+ if (isFeedType(handlerInfo.type)) {
+ // MIME info will be null, create a temp object.
+ params.mimeInfo = this._mimeSvc.getFromTypeAndExtension(handlerInfo.type,
+ handlerInfo.primaryExtension);
+ } else {
+ params.mimeInfo = handlerInfo.wrappedHandlerInfo;
+ }
+
+ params.title = this._prefsBundle.getString("fpTitleChooseApp");
+ params.description = handlerInfo.description;
+ params.filename = null;
+ params.handlerApp = null;
+
+ let onAppSelected = () => {
+ if (this.isValidHandlerApp(params.handlerApp)) {
+ handlerApp = params.handlerApp;
+
+ // Add the app to the type's list of possible handlers.
+ handlerInfo.addPossibleApplicationHandler(handlerApp);
+ }
+
+ chooseAppCallback(handlerApp);
+ };
+
+ gSubDialog.open("chrome://global/content/appPicker.xul",
+ null, params, onAppSelected);
+ } else {
+ let winTitle = this._prefsBundle.getString("fpTitleChooseApp");
+ let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+ let fpCallback = function fpCallback_done(aResult) {
+ if (aResult == Ci.nsIFilePicker.returnOK && fp.file &&
+ this._isValidHandlerExecutable(fp.file)) {
+ handlerApp = Cc["@mozilla.org/uriloader/local-handler-app;1"].
+ createInstance(Ci.nsILocalHandlerApp);
+ handlerApp.name = getFileDisplayName(fp.file);
+ handlerApp.executable = fp.file;
+
+ // Add the app to the type's list of possible handlers.
+ let handlerInfo = this._handledTypes[this._list.selectedItem.type];
+ handlerInfo.addPossibleApplicationHandler(handlerApp);
+
+ chooseAppCallback(handlerApp);
+ }
+ }.bind(this);
+
+ // Prompt the user to pick an app. If they pick one, and it's a valid
+ // selection, then add it to the list of possible handlers.
+ fp.init(window, winTitle, Ci.nsIFilePicker.modeOpen);
+ fp.appendFilters(Ci.nsIFilePicker.filterApps);
+ fp.open(fpCallback);
+ }
+ },
+
+ // Mark which item in the list was last selected so we can reselect it
+ // when we rebuild the list or when the user returns to the prefpane.
+ onSelectionChanged: function() {
+ if (this._list.selectedItem)
+ this._list.setAttribute("lastSelectedType",
+ this._list.selectedItem.getAttribute("type"));
+ },
+
+ _setIconClassForPreferredAction: function(aHandlerInfo, aElement) {
+ // If this returns true, the attribute that CSS sniffs for was set to something
+ // so you shouldn't manually set an icon URI.
+ // This removes the existing actionIcon attribute if any, even if returning false.
+ aElement.removeAttribute("actionIcon");
+
+ if (aHandlerInfo.alwaysAskBeforeHandling) {
+ aElement.setAttribute(APP_ICON_ATTR_NAME, "ask");
+ return true;
+ }
+
+ switch (aHandlerInfo.preferredAction) {
+ case Ci.nsIHandlerInfo.saveToDisk:
+ aElement.setAttribute(APP_ICON_ATTR_NAME, "save");
+ return true;
+
+ case Ci.nsIHandlerInfo.handleInternally:
+ if (isFeedType(aHandlerInfo.type)) {
+ aElement.setAttribute(APP_ICON_ATTR_NAME, "feed");
+ return true;
+ } else if (aHandlerInfo instanceof InternalHandlerInfoWrapper) {
+ aElement.setAttribute(APP_ICON_ATTR_NAME, "ask");
+ return true;
+ }
+ break;
+
+ case kActionUsePlugin:
+ aElement.setAttribute(APP_ICON_ATTR_NAME, "plugin");
+ return true;
+ }
+ aElement.removeAttribute(APP_ICON_ATTR_NAME);
+ return false;
+ },
+
+ _getIconURLForPreferredAction: function(aHandlerInfo) {
+ switch (aHandlerInfo.preferredAction) {
+ case Ci.nsIHandlerInfo.useSystemDefault:
+ return this._getIconURLForSystemDefault(aHandlerInfo);
+
+ case Ci.nsIHandlerInfo.useHelperApp:
+ let preferredApp = aHandlerInfo.preferredApplicationHandler;
+ if (this.isValidHandlerApp(preferredApp))
+ return this._getIconURLForHandlerApp(preferredApp);
+ // Explicit fall-through
+
+ // This should never happen, but if preferredAction is set to some weird
+ // value, then fall back to the generic application icon.
+ default:
+ return ICON_URL_APP;
+ }
+ },
+
+ _getIconURLForHandlerApp: function(aHandlerApp) {
+ if (aHandlerApp instanceof Ci.nsILocalHandlerApp)
+ return this._getIconURLForFile(aHandlerApp.executable);
+
+ if (aHandlerApp instanceof Ci.nsIWebHandlerApp)
+ return this._getIconURLForWebApp(aHandlerApp.uriTemplate);
+
+ if (aHandlerApp instanceof Ci.nsIWebContentHandlerInfo)
+ return this._getIconURLForWebApp(aHandlerApp.uri)
+
+ // We know nothing about other kinds of handler apps.
+ return "";
+ },
+
+ _getIconURLForFile: function(aFile) {
+ var fph = this._ioSvc.getProtocolHandler("file").
+ QueryInterface(Ci.nsIFileProtocolHandler);
+ var urlSpec = fph.getURLSpecFromFile(aFile);
+
+ return "moz-icon://" + urlSpec + "?size=16";
+ },
+
+ _getIconURLForWebApp: function(aWebAppURITemplate) {
+ var uri = this._ioSvc.newURI(aWebAppURITemplate, null, null);
+
+ // Unfortunately we can't use the favicon service to get the favicon,
+ // because the service looks in the annotations table for a record with
+ // the exact URL we give it, and users won't have such records for URLs
+ // they don't visit, and users won't visit the web app's URL template,
+ // they'll only visit URLs derived from that template (i.e. with %s
+ // in the template replaced by the URL of the content being handled).
+
+ if (/^https?$/.test(uri.scheme) && this._prefSvc.getBoolPref("browser.chrome.favicons"))
+ return uri.prePath + "/favicon.ico";
+
+ return "";
+ },
+
+ _getIconURLForSystemDefault: function(aHandlerInfo) {
+ // Handler info objects for MIME types on some OSes implement a property bag
+ // interface from which we can get an icon for the default app, so if we're
+ // dealing with a MIME type on one of those OSes, then try to get the icon.
+ if ("wrappedHandlerInfo" in aHandlerInfo) {
+ let wrappedHandlerInfo = aHandlerInfo.wrappedHandlerInfo;
+
+ if (wrappedHandlerInfo instanceof Ci.nsIMIMEInfo &&
+ wrappedHandlerInfo instanceof Ci.nsIPropertyBag) {
+ try {
+ let url = wrappedHandlerInfo.getProperty("defaultApplicationIconURL");
+ if (url)
+ return url + "?size=16";
+ }
+ catch (ex) {}
+ }
+ }
+
+ // If this isn't a MIME type object on an OS that supports retrieving
+ // the icon, or if we couldn't retrieve the icon for some other reason,
+ // then use a generic icon.
+ return ICON_URL_APP;
+ }
+
+};