apps-menu: Stop taking over Activities button

We don't want the "Activities" button in GNOME Classic, but the current
way of handling it is confusing:

 - the button is hidden, but the corresponding hot corner
   sometimes works (when the application menu isn't open)

 - the button is effectively moved inside the menu, although
   it's clearly not an app or category

 - the apps-menu can be used independent from classic mode, in
   which case removing the "Activities" button may not be wanted

Address those points by removing any handling of the activities button
from the apps-menu extension. We will remove it again from the classic
session via a session mode tweak.

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/69

extensions/apps-menu/extension.js

@@ -25,21 +25,6 @@ const NAVIGATION_REGION_OVERSHOOT = 50;
 Gio._promisify(Gio._LocalFilePrototype, 'query_info_async', 'query_info_finish');
 Gio._promisify(Gio._LocalFilePrototype, 'set_attributes_async', 'set_attributes_finish');
 
-var ActivitiesMenuItem = GObject.registerClass(
-class ActivitiesMenuItem extends PopupMenu.PopupBaseMenuItem {
-    _init(button) {
-        super._init();
-        this._button = button;
-        this.add_child(new St.Label({ text: _('Activities Overview') }));
-    }
-
-    activate(event) {
-        this._button.menu.toggle();
-        Main.overview.toggle();
-        super.activate(event);
-    }
-});
-
 var ApplicationMenuItem = GObject.registerClass(
 class ApplicationMenuItem extends PopupMenu.PopupBaseMenuItem {
     _init(button, app) {
@@ -233,21 +218,6 @@ class ApplicationsMenu extends PopupMenu.PopupMenu {
         return false;
     }
 
-    open(animate) {
-        this._button.hotCorner.setBarrierSize(0);
-        if (this._button.hotCorner.actor) // fallback corner
-            this._button.hotCorner.actor.hide();
-        super.open(animate);
-    }
-
-    close(animate) {
-        let size = Main.layoutManager.panelBox.height;
-        this._button.hotCorner.setBarrierSize(size);
-        if (this._button.hotCorner.actor) // fallback corner
-            this._button.hotCorner.actor.show();
-        super.close(animate);
-    }
-
     toggle() {
         if (this.isOpen) {
             this._button.selectCategory(null);
@@ -406,8 +376,6 @@ class ApplicationsButton extends PanelMenu.Button {
         this.name = 'panelApplications';
         this.label_actor = this._label;
 
-        this.connect('captured-event', this._onCapturedEvent.bind(this));
-
         this._showingId = Main.overview.connect('showing', () => {
             this.add_accessible_state (Atk.StateType.CHECKED);
         });
@@ -449,10 +417,6 @@ class ApplicationsButton extends PanelMenu.Button {
         }
     }
 
-    get hotCorner() {
-        return Main.layoutManager.hotCorners[Main.layoutManager.primaryIndex];
-    }
-
     _createVertSeparator() {
         let separator = new St.DrawingArea({
             style_class: 'calendar-vertical-separator',
@@ -480,14 +444,6 @@ class ApplicationsButton extends PanelMenu.Button {
         this._desktopTarget.destroy();
     }
 
-    _onCapturedEvent(actor, event) {
-        if (event.type() == Clutter.EventType.BUTTON_PRESS) {
-            if (!Main.overview.shouldToggleByCornerOrButton())
-                return true;
-        }
-        return false;
-    }
-
     _onMenuKeyPress(actor, event) {
         let symbol = event.get_key_symbol();
         if (symbol == Clutter.KEY_Left || symbol == Clutter.KEY_Right) {
@@ -630,14 +586,6 @@ class ApplicationsButton extends PanelMenu.Button {
             y_align: St.Align.START
         });
 
-        let activities = new ActivitiesMenuItem(this);
-        this.leftBox.add(activities, {
-            expand: false,
-            x_fill: true,
-            y_fill: false,
-            y_align: St.Align.START
-        });
-
         this.applicationsBox = new St.BoxLayout({ vertical: true });
         this.applicationsScrollBox.add_actor(this.applicationsBox);
         this.categoriesBox = new St.BoxLayout({ vertical: true });
@@ -749,19 +697,16 @@ class ApplicationsButton extends PanelMenu.Button {
 });
 
 let appsMenuButton;
-let activitiesButton;
 
 function enable() {
-    activitiesButton = Main.panel.statusArea['activities'];
-    activitiesButton.container.hide();
     appsMenuButton = new ApplicationsButton();
-    Main.panel.addToStatusArea('apps-menu', appsMenuButton, 1, 'left');
+    let index = Main.sessionMode.panel.left.indexOf('activities') + 1;
+    Main.panel.addToStatusArea('apps-menu', appsMenuButton, index, 'left');
 }
 
 function disable() {
     Main.panel.menuManager.removeMenu(appsMenuButton.menu);
     appsMenuButton.destroy();
-    activitiesButton.container.show();
 }
 
 function init() {