panel: Replace remote app menu

Since the plans to retire the app menu were announced, nobody objected to
the removal of the menu content, however some concerns were raised about
the menu's secondary role as indicator.

Account for that by not removing the existing app menu, but replacing it
with a built-in menu similar to the existing app icon context menu.

https://gitlab.gnome.org/GNOME/gnome-shell/issues/624

js/ui/panel.js

@@ -2,6 +2,7 @@
 
 const Cairo = imports.cairo;
 const Clutter = imports.gi.Clutter;
+const Gio = imports.gi.Gio;
 const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
@@ -20,7 +21,6 @@ const DND = imports.ui.dnd;
 const Overview = imports.ui.overview;
 const PopupMenu = imports.ui.popupMenu;
 const PanelMenu = imports.ui.panelMenu;
-const RemoteMenu = imports.ui.remoteMenu;
 const Main = imports.ui.main;
 const Tweener = imports.ui.tweener;
 
@@ -74,6 +74,117 @@ function _unpremultiply(color) {
                                blue: blue, alpha: color.alpha });
 };
 
+class AppMenu extends PopupMenu.PopupMenu {
+    constructor(sourceActor) {
+        super(sourceActor, 0.0, St.Side.TOP);
+
+        this._app = null;
+        this._appSystem = Shell.AppSystem.get_default();
+
+        this._windowsChangedId = 0;
+
+        this._windowSection = new PopupMenu.PopupMenuSection();
+        this.addMenuItem(this._windowSection);
+
+        this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
+
+        this._newWindowItem = this.addAction(_("New Window"), () => {
+            this._app.open_new_window(-1);
+        });
+
+        this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
+
+        this._actionSection = new PopupMenu.PopupMenuSection();
+        this.addMenuItem(this._actionSection);
+
+        this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
+
+        this._detailsItem = this.addAction(_("Show Details"), () => {
+            let id = this._app.get_id();
+            let args = GLib.Variant.new('(ss)', [id, '']);
+            Gio.DBus.get(Gio.BusType.SESSION, null, (o, res) => {
+                let bus = Gio.DBus.get_finish(res);
+                bus.call('org.gnome.Software',
+                         '/org/gnome/Software',
+                         'org.gtk.Actions', 'Activate',
+                         GLib.Variant.new('(sava{sv})',
+                                          ['details', [args], null]),
+                         null, 0, -1, null, null);
+            });
+        });
+
+        this.addAction(_("Quit"), () => {
+            this._app.request_quit();
+        });
+
+        this._appSystem.connect('installed-changed', () => {
+            let sw = this._appSystem.lookup_app('org.gnome.Software.desktop');
+            this._detailsItem.actor.visible = (sw != null);
+        });
+    }
+
+    isEmpty() {
+        if (!this._app)
+            return true;
+        return super.isEmpty();
+    }
+
+    setApp(app) {
+        if (this._app == app)
+            return;
+
+        if (this._windowsChangedId)
+            this._app.disconnect(this._windowsChangedId);
+        this._windowsChangedId = 0;
+
+        this._app = app;
+
+        if (app) {
+            this._windowsChangedId = app.connect('windows-changed', () => {
+                this._updateWindowsSection();
+            });
+        }
+
+        this._updateWindowsSection();
+
+        let appInfo = app ? app.app_info : null;
+        let actions = appInfo ? appInfo.list_actions() : [];
+
+        this._actionSection.removeAll();
+        actions.forEach(action => {
+            let label = appInfo.get_action_name(action);
+            this._actionSection.addAction(label, event => {
+                this._app.launch_action(action, event.get_time(), -1);
+            });
+        });
+
+        this._newWindowItem.actor.visible =
+            app && app.can_open_new_window() && !actions.includes('new-window');
+    }
+
+    _updateWindowsSection() {
+        this._windowSection.removeAll();
+
+        if (!this._app)
+            return;
+
+        let windows = this._app.get_windows();
+        windows.forEach(window => {
+            let title = window.title || this._app.get_name();
+            this._windowSection.addAction(title, event => {
+                Main.activateWindow(window, event.get_time());
+            });
+        });
+
+        // Add separator between windows of the current desktop and other windows.
+        let workspaceManager = global.workspace_manager;
+        let activeWorkspace = workspaceManager.get_active_workspace();
+        let pos = windows.findIndex(w => w.get_workspace() != activeWorkspace);
+        if (pos >= 0)
+            this._windowSection.addMenuItem(new PopupMenu.PopupSeparatorMenuItem(), pos);
+    }
+}
+
 /**
  * AppMenuButton:
  *
@@ -95,8 +206,6 @@ var AppMenuButton = GObject.registerClass({
         this._menuManager = panel.menuManager;
         this._gtkSettings = Gtk.Settings.get_default();
         this._targetApp = null;
-        this._appMenuNotifyId = 0;
-        this._actionGroupNotifyId = 0;
         this._busyNotifyId = 0;
 
         let bin = new St.Bin({ name: 'appMenu' });
@@ -132,6 +241,10 @@ var AppMenuButton = GObject.registerClass({
 
         this._spinner = null;
 
+        let menu = new AppMenu(this);
+        this.setMenu(menu);
+        this._menuManager.addMenu(menu);
+
         let tracker = Shell.WindowTracker.get_default();
         let appSys = Shell.AppSystem.get_default();
         this._focusAppNotifyId =
@@ -278,14 +391,6 @@ var AppMenuButton = GObject.registerClass({
         let targetApp = this._findTargetApp();
 
         if (this._targetApp != targetApp) {
-            if (this._appMenuNotifyId) {
-                this._targetApp.disconnect(this._appMenuNotifyId);
-                this._appMenuNotifyId = 0;
-            }
-            if (this._actionGroupNotifyId) {
-                this._targetApp.disconnect(this._actionGroupNotifyId);
-                this._actionGroupNotifyId = 0;
-            }
             if (this._busyNotifyId) {
                 this._targetApp.disconnect(this._busyNotifyId);
                 this._busyNotifyId = 0;
@@ -294,8 +399,6 @@ var AppMenuButton = GObject.registerClass({
             this._targetApp = targetApp;
 
             if (this._targetApp) {
-                this._appMenuNotifyId = this._targetApp.connect('notify::menu', this._sync.bind(this));
-                this._actionGroupNotifyId = this._targetApp.connect('notify::action-group', this._sync.bind(this));
                 this._busyNotifyId = this._targetApp.connect('notify::busy', this._sync.bind(this));
                 this._label.set_text(this._targetApp.get_name());
                 this.actor.set_accessible_name(this._targetApp.get_name());
@@ -319,43 +422,10 @@ var AppMenuButton = GObject.registerClass({
         this.actor.reactive = (visible && !isBusy);
 
         this._syncIcon();
-        this._maybeSetMenu();
+        this.menu.setApp(this._targetApp);
         this.emit('changed');
     }
 
-    _maybeSetMenu() {
-        let menu;
-
-        if (this._targetApp == null) {
-            menu = null;
-        } else if (this._targetApp.action_group && this._targetApp.menu) {
-            if (this.menu instanceof RemoteMenu.RemoteMenu &&
-                this.menu.actionGroup == this._targetApp.action_group)
-                return;
-
-            menu = new RemoteMenu.RemoteMenu(this.actor, this._targetApp.menu, this._targetApp.action_group);
-            menu.connect('activate', () => {
-                let win = this._targetApp.get_windows()[0];
-                win.check_alive(global.get_current_time());
-            });
-
-        } else {
-            if (this.menu && this.menu.isDummyQuitMenu)
-                return;
-
-            // fallback to older menu
-            menu = new PopupMenu.PopupMenu(this.actor, 0.0, St.Side.TOP, 0);
-            menu.isDummyQuitMenu = true;
-            menu.addAction(_("Quit"), () => {
-                this._targetApp.request_quit();
-            });
-        }
-
-        this.setMenu(menu);
-        if (menu)
-            this._menuManager.addMenu(menu);
-    }
-
     _onDestroy() {
         if (this._appStateChangedSignalId > 0) {
             let appSys = Shell.AppSystem.get_default();