windowManager: Fix windows not getting undimmed while hidden

Mutter's plugin destroy event doesn't happen if a window is hidden
when it gets unmanaged so we also need to handle the
MetaWindow::unmanaged signal to check whether the parent should
dimmed.

https://bugzilla.gnome.org/show_bug.cgi?id=752524

diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index 5222b986d604f169398abe6cfdd11b667b2e2568..8b0398b3df4d6663a7641263c4fc0c7052ed0d0c 100644 (file)
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -1424,6 +1424,11 @@ const WindowManager = new Lang.Class({
 
             actor._windowType = type;
         }));
+        actor.meta_window.connect('unmanaged', Lang.bind(this, function(window) {
+                let parent = window.get_transient_for();
+                if (parent)
+                    this._checkDimming(parent);
+        }));
 
         if (actor.meta_window.is_attached_dialog())
             this._checkDimming(actor.get_meta_window().get_transient_for());