[gnome-shell-extensions] window-list: Respect MWM hints

[Florian Müllner <fmuellner src gnome org>]

commit eafdd1d78da17d6f7944d12938d4309e3bb27ef9
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Jun 9 17:17:47 2017 +0200

    window-list: Respect MWM hints
    
    The window context menu contains minimize, maximize and close items
    that are currently enabled unconditionally, regardless of whether
    the window indicates support. Respect those hints by updating the
    items' sensitivity every time the popup is shown.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783601

 extensions/window-list/extension.js |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/extensions/window-list/extension.js b/extensions/window-list/extension.js
index b804d3d..f01b872 100644
--- a/extensions/window-list/extension.js
+++ b/extensions/window-list/extension.js
@@ -107,13 +107,22 @@ const WindowContextMenu = new Lang.Class({
                                      Lang.bind(this, this._updateMaximizeItem));
         this._updateMaximizeItem();
 
-        let item = new PopupMenu.PopupMenuItem(_("Close"));
-        item.connect('activate', Lang.bind(this, function() {
+        this._closeItem = new PopupMenu.PopupMenuItem(_("Close"));
+        this._closeItem.connect('activate', Lang.bind(this, function() {
             this._metaWindow.delete(global.get_current_time());
         }));
-        this.addMenuItem(item);
+        this.addMenuItem(this._closeItem);
 
         this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
+
+        this.connect('open-state-changed', () => {
+            if (!this.isOpen)
+                return;
+
+            this._minimizeItem.setSensitive(this._metaWindow.can_minimize());
+            this._maximizeItem.setSensitive(this._metaWindow.can_maximize());
+            this._closeItem.setSensitive(this._metaWindow.can_close());
+        });
     },
 
     _updateMinimizeItem: function() {