notificationDaemon: Implement the new GTK+ notifications API

The new API is designed to support features like persistence and uses
the new org.freedesktop.Application specification for activating
actions on notifications. While we won't add support for persistence
yet, implement the new notification spec with parity of the old one.

https://bugzilla.gnome.org/show_bug.cgi?id=710137

js/ui/notificationDaemon.js

@@ -710,10 +710,208 @@ const FdoNotificationDaemonSource = new Lang.Class({
     }
 });
 
+
+const GtkNotificationDaemonNotification = new Lang.Class({
+    Name: 'GtkNotificationDaemonNotification',
+    Extends: MessageTray.Notification,
+
+    _init: function(source, notification) {
+        this.parent(source);
+
+        let { "title": title,
+              "body": body,
+              "icon": gicon,
+              "urgent": urgent,
+              "buttons": buttons,
+              "default-action": defaultAction,
+              "default-action-target": defaultActionTarget } = notification;
+
+        this.setUrgency(urgent ? MessageTray.Urgency.CRITICAL : MessageTray.Urgency.NORMAL);
+
+        if (buttons) {
+            buttons.deep_unpack().forEach(Lang.bind(this, function(button) {
+                this.addAction(button.label, Lang.bind(this, this._onButtonClicked, button));
+            }));
+        }
+
+        this._defaultAction = defaultAction ? defaultAction.unpack() : null;
+        this._defaultActionTarget = defaultActionTarget ? defaultActionTarget.unpack() : null;
+
+        this.update(title.unpack(), body ? body.unpack() : null, { gicon: gicon });
+    },
+
+    _activateAction: function(namespacedActionId, target) {
+        if (namespacedActionId) {
+            if (namespacedActionId.startsWith('app.')) {
+                let actionId = namespacedActionId.slice('app.'.length);
+                this.source.activateAction(actionId, target);
+            }
+        } else {
+            this.source.open();
+        }
+    },
+
+    _onButtonClicked: function(button) {
+        let { "action": action, "action-target": actionTarget } = button;
+        this._activateAction(action, actionTarget);
+    },
+
+    _onClicked: function() {
+        this._activateAction(this._defaultAction, this._defaultActionTarget);
+        this.parent();
+    },
+});
+
+const FdoApplicationIface = <interface name="org.freedesktop.Application">
+<method name="ActivateAction">
+    <arg type="s" direction="in" />
+    <arg type="av" direction="in" />
+    <arg type="a{sv}" direction="in" />
+</method>
+<method name="Activate">
+    <arg type="a{sv}" direction="in" />
+</method>
+</interface>;
+const FdoApplicationProxy = Gio.DBusProxy.makeProxyWrapper(FdoApplicationIface);
+
+function objectPathFromAppId(appId) {
+    return '/' + appId.replace(/\./g, '/');
+}
+
+function getPlatformData() {
+    let startupId = GLib.Variant.new('s', '_TIME' + global.get_current_time());
+    return { "desktop-startup-id": startupId };
+}
+
+function InvalidAppError() {}
+
+const GtkNotificationDaemonAppSource = new Lang.Class({
+    Name: 'GtkNotificationDaemonAppSource',
+    Extends: MessageTray.Source,
+
+    _init: function(appId) {
+        this._appId = appId;
+        this._objectPath = objectPathFromAppId(appId);
+
+        this._app = Shell.AppSystem.get_default().lookup_app(appId + '.desktop');
+        if (!this._app)
+            throw new InvalidAppError();
+
+        this._notifications = {};
+
+        this.parent(this._app.get_name());
+    },
+
+    createIcon: function(size) {
+        return this._app.create_icon_texture(size);
+    },
+
+    _createPolicy: function() {
+        return new MessageTray.NotificationApplicationPolicy(this._appId);
+    },
+
+    _createApp: function() {
+        return new FdoApplicationProxy(Gio.DBus.session, this._appId, this._objectPath);
+    },
+
+    activateAction: function(actionId, target) {
+        let app = this._createApp();
+        app.ActivateActionRemote(actionId, target ? [target] : [], getPlatformData());
+    },
+
+    open: function() {
+        let app = this._createApp();
+        app.ActivateRemote(getPlatformData());
+    },
+
+    addNotification: function(notificationId, notificationParams) {
+        if (this._notifications[notificationId])
+            this._notifications[notificationId].destroy();
+
+        let notification = new GtkNotificationDaemonNotification(this, notificationParams);
+        notification.connect('destroy', Lang.bind(this, function() {
+            delete this._notifications[notificationId];
+        }));
+        this._notifications[notificationId] = notification;
+
+        this.notify(notification);
+    },
+
+    removeNotification: function(notificationId) {
+        if (this._notifications[notificationId])
+            this._notifications[notificationId].destroy(MessageTray.NotificationDestroyedReason.SOURCE_CLOSED);
+    },
+});
+
+const GtkNotificationsIface = <interface name="org.gtk.Notifications">
+<method name="AddNotification">
+    <arg type="s" direction="in" />
+    <arg type="s" direction="in" />
+    <arg type="a{sv}" direction="in" />
+</method>
+<method name="RemoveNotification">
+    <arg type="s" direction="in" />
+    <arg type="s" direction="in" />
+</method>
+</interface>;
+
+const GtkNotificationDaemon = new Lang.Class({
+    Name: 'GtkNotificationDaemon',
+
+    _init: function() {
+        this._sources = {};
+
+        this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(GtkNotificationsIface, this);
+        this._dbusImpl.export(Gio.DBus.session, '/org/gtk/Notifications');
+
+        Gio.DBus.session.own_name('org.gtk.Notifications', Gio.BusNameOwnerFlags.REPLACE, null, null);
+    },
+
+    _ensureAppSource: function(appId) {
+        if (this._sources[appId])
+            return this._sources[appId];
+
+        let source = new GtkNotificationDaemonAppSource(appId);
+
+        source.connect('destroy', Lang.bind(this, function() {
+            delete this._sources[appId];
+        }));
+        Main.messageTray.add(source);
+        this._sources[appId] = source;
+        return source;
+    },
+
+    AddNotificationAsync: function(params, invocation) {
+        let [appId, notificationId, notification] = params;
+
+        let source;
+        try {
+            source = this._ensureAppSource(appId);
+        } catch(e if e instanceof InvalidAppError) {
+            invocation.return_dbus_error('org.gtk.Notifications.InvalidApp', 'The app by ID "%s" could not be found'.format(appId));
+            return;
+        }
+
+        source.addNotification(notificationId, notification);
+
+        invocation.return_value(null);
+    },
+
+    RemoveNotificationAsync: function(params, invocation) {
+        let [appId, notificationId] = params;
+        let source = this._sources[appId];
+        if (source)
+            source.removeNotification(notificationId);
+
+        invocation.return_value(null);
+    },
+});
+
 const NotificationDaemon = new Lang.Class({
     Name: 'NotificationDaemon',
 
     _init: function() {
         this._fdoNotificationDaemon = new FdoNotificationDaemon();
+        this._gtkNotificationDaemon = new GtkNotificationDaemon();
     },
 });