Javascript Fixes for GNOME shell 42

Convert ArgosButton and ArgosLineView to GObject.registerClass().

Unfortunately, this time it seems that we can't maintain backward
compatibility. For reasons I can't explain, until GNOME 41 the "complex"
classes ArgosButton and ArgosLineView could still be defined using
Lang.Class(), therefore we could get away with the simplistic
makeSimpleClass() trick to define classes differently for different
GNOME shell versions. Now this doesn't work any more, classes with
multiple methods can't be converted between Lang.Class() and
GObject.registerClass() syntax without complex text procesing.

This fixes errors like this:

Mar 25 18:11:49 apollon.suse.de gnome-shell[15049]: JS ERROR: Extension argos@pew.worldwidemann.com: TypeError: Object 0x284558126958 is not a subclass of GObject_Objec>
                                                    _construct@resource:///org/gnome/gjs/modules/script/_legacy.js:536:31
                                                    wrapper@resource:///org/gnome/gjs/modules/script/_legacy.js:83:27
                                                    newClass@resource:///org/gnome/gjs/modules/script/_legacy.js:115:21
                                                    Class@resource:///org/gnome/gjs/modules/script/_legacy.js:66:16
                                                    @/home/mwilck/.local/share/gnome-shell/extensions/argos@pew.worldwidemann.com/button.js:24:19
                                                    @/home/mwilck/.local/share/gnome-shell/extensions/argos@pew.worldwidemann.com/extension.js:18:21

I've removed GNOME shell < 3.34 from the compatibility list.
GObject.registerClass() should be available in 3.34. So far I have only tested
this with GNOME shell 42.

argos@pew.worldwidemann.com/button.js

@@ -10,6 +10,7 @@
  */
 
 const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 const GLib = imports.gi.GLib;
 const Gio = imports.gi.Gio;
 const PanelMenu = imports.ui.panelMenu;
@@ -21,12 +22,14 @@ const ArgosLineView = Extension.imports.lineview.ArgosLineView;
 const ArgosMenuItem = Extension.imports.menuitem.ArgosMenuItem;
 const Utilities = Extension.imports.utilities;
 
-var ArgosButton = new Lang.Class({
-  Name: "ArgosButton",
-  Extends: PanelMenu.Button,
+var ArgosButton = GObject.registerClass({
+  GTypeName: "ArgosButton",
+},
 
-  _init: function(file, settings) {
-    this.parent(0, "", false);
+class ArgosButton extends PanelMenu.Button {
+
+  _init(file, settings) {
+    super._init(0, "", false);
 
     this._file = file;
     this._updateInterval = settings.updateInterval;
@@ -52,9 +55,9 @@ var ArgosButton = new Lang.Class({
           this.update();
       }));
     }
-  },
+  }
 
-  _onDestroy: function() {
+  _onDestroy() {
     this._isDestroyed = true;
 
     if (this._updateTimeout !== null)
@@ -63,18 +66,18 @@ var ArgosButton = new Lang.Class({
       Mainloop.source_remove(this._cycleTimeout);
 
     this.menu.removeAll();
-  },
+  }
 
-  update: function() {
+  update() {
     if (this._updateTimeout !== null) {
       Mainloop.source_remove(this._updateTimeout);
       this._updateTimeout = null;
     }
 
     this._update();
-  },
+  }
 
-  _update: function() {
+  _update() {
     if (this._updateRunning)
       return;
 
@@ -106,9 +109,9 @@ var ArgosButton = new Lang.Class({
       log("Unable to execute file '" + this._file.get_basename() + "': " + error);
       this._updateRunning = false;
     }
-  },
+  }
 
-  _processOutput: function(output) {
+  _processOutput(output) {
     let buttonLines = [];
     let dropdownLines = [];
 

argos@pew.worldwidemann.com/lineview.js

@@ -9,27 +9,29 @@
  * (https://gnu.org/licenses/gpl.html)
  */
 
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 const GLib = imports.gi.GLib;
 const Gio = imports.gi.Gio;
 const GdkPixbuf = imports.gi.GdkPixbuf;
 const St = imports.gi.St;
 const Clutter = imports.gi.Clutter;
 
-var ArgosLineView = new Lang.Class({
-  Name: "ArgosLineView",
-  Extends: St.BoxLayout,
+var ArgosLineView = GObject.registerClass({
+  GTypeName: "ArgosLineView",
+},
 
-  _init: function(line) {
-    this.parent({
+class ArgosLineView extends St.BoxLayout {
+
+  _init(line) {
+    super._init({
       style_class: "argos-line-view"
     });
 
     if (typeof line !== "undefined")
       this.setLine(line);
-  },
+  }
 
-  setLine: function(line) {
+  setLine(line) {
     this.line = line;
 
     this.remove_all_children();
@@ -105,9 +107,9 @@ var ArgosLineView = new Lang.Class({
         }
       }
     }
-  },
+  }
 
-  setMarkup: function(markup) {
+  setMarkup(markup) {
     this.setLine({
       markup: markup
     });

argos@pew.worldwidemann.com/metadata.json

@@ -4,14 +4,11 @@
   "description": "Create GNOME Shell extensions in seconds",
   "url": "https://github.com/p-e-w/argos",
   "shell-version": [
-    "3.26",
-    "3.28",
-    "3.30",
-    "3.32",
     "3.34",
     "3.36",
     "3.38",
     "40",
-    "41"
+    "41",
+    "42"
   ]
 }