[gnome-shell] layout: really queue region update before redraw

[Daniel Drake <dsd src gnome org>]

commit 29485ff24b60a7ec1a95f311642994d11cae7227
Author: Daniel Drake <drake endlessm com>
Date:   Thu Mar 13 14:46:34 2014 -0600

    layout: really queue region update before redraw
    
    This code may have worked when written in 2009, but later gjs commit
    b5e467d89aea43a8e32a1138d232c8a32e6b0785 removed the priority
    parameter from idle_add.
    
    Now, when running a constantly-updating client (es2gears) on an
    embedded platform, _updateRegions() does not get called and I see
    unresponsive window decorations.
    
    Update the code to use meta_later_add() like other parts of the
    shell, which is actually slightly better in this case anyway.
    Solves the unresponsiveness problem.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=585500

 js/ui/layout.js |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index 82d848a..7b3647c 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -4,7 +4,6 @@ const Clutter = imports.gi.Clutter;
 const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const Lang = imports.lang;
-const Mainloop = imports.mainloop;
 const Meta = imports.gi.Meta;
 const Shell = imports.gi.Shell;
 const Signals = imports.signals;
@@ -907,8 +906,8 @@ const LayoutManager = new Lang.Class({
             return;
 
         if (!this._updateRegionIdle)
-            this._updateRegionIdle = Mainloop.idle_add(Lang.bind(this, this._updateRegions),
-                                                       Meta.PRIORITY_BEFORE_REDRAW);
+            this._updateRegionIdle = Meta.later_add(Meta.LaterType.BEFORE_REDRAW,
+                                                    Lang.bind(this, this._updateRegions));
     },
 
     _getWindowActorsForWorkspace: function(workspace) {
@@ -939,7 +938,7 @@ const LayoutManager = new Lang.Class({
         let rects = [], struts = [], i;
 
         if (this._updateRegionIdle) {
-            Mainloop.source_remove(this._updateRegionIdle);
+            Meta.later_remove(this._updateRegionIdle);
             delete this._updateRegionIdle;
         }