Port to class in preperation for 3.32

see:
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/361

TODO: port the LayoutManager in minimap.js, though it looks like gjs won't
deprecrate Lang.Class yet, so it's probably fine to keep using it for now.

liveAltTab.js

@@ -1,6 +1,5 @@
 var Extension = imports.misc.extensionUtils.extensions['paperwm@hedning:matrix.org'];
 var Clutter = imports.gi.Clutter;
-var Lang = imports.lang;
 var Meta = imports.gi.Meta;
 var AltTab = imports.ui.altTab;
 var Main = imports.ui.main;
@@ -14,16 +13,14 @@ var debug = utils.debug;
 
 var prefs = Extension.imports.settings.prefs;
 
-var LiveAltTab = Lang.Class({
-    Name: 'LiveAltTab',
-    Extends: AltTab.WindowSwitcherPopup,
+var LiveAltTab = class LiveAltTab extends AltTab.WindowSwitcherPopup {
 
-    _init(reverse) {
+    constructor(reverse) {
         this.reverse = reverse;
-        this.parent();
-    },
+        super();
+    }
 
-    _getWindowList: function (reverse) {
+    _getWindowList(reverse) {
         let tabList = global.display.get_tab_list(
             Meta.TabList.NORMAL_ALL,
             global.workspace_manager.get_active_workspace())
@@ -37,9 +34,9 @@ var LiveAltTab = Lang.Class({
         } else {
             return tabList.concat(this.reverse ? scratch.reverse() : scratch);
         }
-    },
+    }
 
-    _initialSelection: function(backward, actionName) {
+    _initialSelection(backward, actionName) {
         this._block = Main.wm._blockAnimations;
         Main.wm._blockAnimations = true;
         this.space = Tiling.spaces.selectedSpace;
@@ -65,10 +62,10 @@ var LiveAltTab = Lang.Class({
         Main.uiGroup.insert_child_above(fog, global.window_group);
         this.fog = fog;
 
-        this.parent(backward, actionName);
-    },
+        super._initialSelection(backward, actionName);
+    }
 
-    _keyPressHandler: function(keysym, mutterActionId) {
+    _keyPressHandler(keysym, mutterActionId) {
         if (keysym === Clutter.KEY_Escape)
             return Clutter.EVENT_PROPAGATE;
         // After the first super-tab the mutterActionId we get is apparently
@@ -96,10 +93,10 @@ var LiveAltTab = Lang.Class({
         //     action.handler(metaWindow, space);
         //     return true;
         // }
-        return this.parent(keysym, mutterActionId);
-    },
+        return super._keyPressHandler(keysym, mutterActionId);
+    }
 
-    _select: function(num) {
+    _select(num) {
 
         let from = this._switcherList.windows[this._selectedIndex];
         let to = this._switcherList.windows[num];
@@ -111,11 +108,11 @@ var LiveAltTab = Lang.Class({
         let clone = new Clutter.Clone({source: actor});
         clone.position = actor.position;
 
-            let space = Tiling.spaces.spaceOfWindow(to);
+        let space = Tiling.spaces.spaceOfWindow(to);
         if (space.indexOf(to) !== -1) {
             let x = Tiling.ensuredX(to, space) + space.monitor.x;
-        clone.x = x + space.monitor.x ;
-        clone.x -= frame.x - actor.x;
+            clone.x = x + space.monitor.x ;
+            clone.x -= frame.x - actor.x;
         }
 
         this.clone = clone;
@@ -124,24 +121,24 @@ var LiveAltTab = Lang.Class({
         // Tiling.ensureViewport(to, space);
         this._selectedIndex = num;
         this._switcherList.highlight(num);
-    },
+    }
 
-    _finish: function() {
-        this.parent();
+    _finish() {
+        super._finish();
         this.was_accepted = true;
-    },
+    }
 
-    _itemEnteredHandler: function() {
+    _itemEnteredHandler() {
         // The item-enter (mouse hover) event is triggered even after a item is
         // accepted. This can cause _select to run on the item below the pointer
         // ensuring the wrong window.
         if(!this.was_accepted) {
-            this.parent.apply(this, arguments);
+            super._itemEnteredHandler.apply(this, arguments);
         }
-    },
+    }
 
-    _onDestroy: function() {
-        this.parent();
+    _onDestroy() {
+        super._onDestroy();
         debug('#preview', 'onDestroy', this.was_accepted);
         Main.wm._blockAnimations = this._block;
         if(!this.was_accepted) {
@@ -162,7 +159,7 @@ var LiveAltTab = Lang.Class({
         let to = this._switcherList.windows[this._selectedIndex];
         Tiling.focus_handler(to);
     }
-})
+}
 
 function liveAltTab(meta_window, space, {display, screen, binding}) {
     let tabPopup = new LiveAltTab(binding.is_reversed());

navigator.js

@@ -7,7 +7,6 @@
 
 var Extension = imports.misc.extensionUtils.extensions['paperwm@hedning:matrix.org'];
 var SwitcherPopup = imports.ui.switcherPopup;
-var Lang = imports.lang;
 var Meta = imports.gi.Meta;
 var Main = imports.ui.main;
 var Mainloop = imports.mainloop;
@@ -39,24 +38,21 @@ class SwitcherList {
 }
 Signals.addSignalMethods(SwitcherList.prototype);
 
-var PreviewedWindowNavigator = new Lang.Class({
-    Name: 'PreviewedWindowNavigator',
-    Extends: SwitcherPopup.SwitcherPopup,
-
-    _init: function() {
+var PreviewedWindowNavigator = class PreviewedWindowNavigator extends SwitcherPopup.SwitcherPopup {
+    constructor() {
         // Do the absolute minimal here, as `parent.show` is buggy and can
         // return early making cleanup hard. We do most initialization in
         // `_initialSelection` instead.
 
         // HACK: workaround to enable moving from empty workspace. See check in
         // SwitcherPopup.show
-        this.parent([1]);
+        super([1]);
         this._switcherList = new SwitcherList();
         debug('#preview', 'init', this._switcherList);
 
-    },
+    }
 
-    _initialSelection: function(backward, actionName) {
+    _initialSelection(backward, actionName) {
         debug('#preview', '_initialSelection');
         this.navigator = getNavigator();
         let actionId = Keybindings.idOf(actionName);
@@ -71,9 +67,9 @@ var PreviewedWindowNavigator = new Lang.Class({
         }
 
         this._doAction(actionId);
-    },
+    }
 
-    _doAction: function(mutterActionId) {
+    _doAction(mutterActionId) {
 
         let action = Keybindings.byId(mutterActionId);
         if (action && action.options.activeInNavigator) {
@@ -90,37 +86,37 @@ var PreviewedWindowNavigator = new Lang.Class({
         }
 
         return false;
-    },
+    }
 
-    _keyPressHandler: function(keysym, action) {
+    _keyPressHandler(keysym, action) {
         if (keysym !== Clutter.KEY_Escape && this._doAction(action)) {
             return Clutter.EVENT_STOP;
         } else {
             return Clutter.EVENT_PROPAGATE;
         }
-    },
+    }
 
-    _finish: function(timestamp) {
+    _finish(timestamp) {
         debug('#preview', 'finish');
         this.navigator.accept();
-        this.parent(timestamp);
-    },
+        super._finish(timestamp);
+    }
 
-    _itemEnteredHandler: function() {
+    _itemEnteredHandler() {
         // The item-enter (mouse hover) event is triggered even after a item is
         // accepted. This can cause _select to run on the item below the pointer
         // ensuring the wrong window.
         if(!this.was_accepted) {
-            this.parent.apply(this, arguments);
+            super._itemEnteredHandler.apply(this, arguments);
         }
-    },
+    }
 
-    destroy: function() {
+    destroy() {
         this.actor.hide(); // Prevents finalized crap
-        this.parent();
+        super.destroy();
         this.navigator.destroy();
     }
-});
+};
 
 var navigator;
 var Navigator = class Navigator {

prefs.js

@@ -4,7 +4,6 @@ const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
 const Gdk = imports.gi.Gdk;
-const Lang = imports.lang;
 const Mainloop = imports.mainloop;
 
 const ExtensionUtils = imports.misc.extensionUtils;

scratch.js

@@ -175,7 +175,6 @@ function hide() {
 }
 
 // Monkey patch the alt-space menu
-var Lang = imports.lang;
 var PopupMenu = imports.ui.popupMenu;
 var WindowMenu = imports.ui.windowMenu;
 var originalBuildMenu = WindowMenu.WindowMenu.prototype._buildMenu;

stackoverlay.js

@@ -2,7 +2,6 @@ var Extension = imports.misc.extensionUtils.extensions['paperwm@hedning:matrix.o
 var Tiling = Extension.imports.tiling;
 var Clutter = imports.gi.Clutter;
 var Tweener = imports.ui.tweener;
-var Lang = imports.lang;
 var Main = imports.ui.main;
 var Mainloop = imports.mainloop;
 var Shell = imports.gi.Shell;
@@ -153,10 +152,8 @@ class ClickOverlay {
     }
 }
 
-var StackOverlay = new Lang.Class({
-    Name: 'Stackoverlay',
-
-    _init: function(direction, monitor) {
+var StackOverlay = class StackOverlay {
+    constructor(direction, monitor) {
 
         this._direction = direction;
 
@@ -194,7 +191,7 @@ var StackOverlay = new Lang.Class({
         Main.layoutManager.trackChrome(overlay);
 
         this.overlay = overlay;
-    },
+    }
 
     triggerPreview() {
         if ("_previewId" in this)
@@ -221,7 +218,7 @@ var StackOverlay = new Lang.Class({
                 x = monitor.x;
             clone.set_position(x, y);
         });
-    },
+    }
 
     removePreview() {
         if ("_previewId" in this) {
@@ -237,9 +234,9 @@ var StackOverlay = new Lang.Class({
         let space = Tiling.spaces.spaceOfWindow(this.target);
         // Show the WindowActors again and re-apply clipping
         space.moveDone();
-    },
+    }
 
-    removeBarrier: function() {
+    removeBarrier() {
         if (this.barrier) {
             if (this.pressureBarrier)
                 this.pressureBarrier.removeBarrier(this.barrier);
@@ -248,9 +245,9 @@ var StackOverlay = new Lang.Class({
             this.barrier = null;
         }
         this._removeBarrierTimeoutId = 0;
-    },
+    }
 
-    updateBarrier: function(force) {
+    updateBarrier(force) {
         if (force)
             this.removeBarrier();
 
@@ -289,9 +286,9 @@ var StackOverlay = new Lang.Class({
             directions
         });
         this.pressureBarrier.addBarrier(this.barrier);
-    },
+    }
 
-    setTarget: function(space, index) {
+    setTarget(space, index) {
 
         if (this.clone) {
             this.clone.destroy();
@@ -360,5 +357,5 @@ var StackOverlay = new Lang.Class({
         this.updateBarrier();
 
         return true;
-    },
-});
+    }
+};

tiling.js

@@ -1,7 +1,6 @@
 var Extension = imports.misc.extensionUtils.extensions['paperwm@hedning:matrix.org'];
 var GLib = imports.gi.GLib;
 var Tweener = imports.ui.tweener;
-var Lang = imports.lang;
 var Meta = imports.gi.Meta;
 var Clutter = imports.gi.Clutter;
 var St = imports.gi.St;