[gnome-shell] LayoutManager: Add primary-fullscreen-changed signal

[Adel Gadllah <agadllah src gnome org>]

commit 6700f8614507a257878b3ff732b2cbbb2df63b56
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Thu Jun 7 00:20:23 2012 +0200

    LayoutManager: Add primary-fullscreen-changed signal
    
    Add a signal to the LayoutManager which gets emitted once the primary monitor
    enters or leaves the fullscreen state.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=677590

 js/ui/layout.js |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index 66bf995..6351ad9 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -53,6 +53,10 @@ const LayoutManager = new Lang.Class({
         global.screen.connect('monitors-changed',
                               Lang.bind(this, this._monitorsChanged));
         this._monitorsChanged();
+
+        this._chrome.connect('primary-fullscreen-changed', Lang.bind(this, function(chrome, state) {
+            this.emit('primary-fullscreen-changed', state);
+        }));
     },
 
     // This is called by Main after everything else is constructed;
@@ -852,6 +856,8 @@ const Chrome = new Lang.Class({
         for (let i = 0; i < this._monitors.length; i++)
             wasInFullscreen[i] = this._monitors[i].inFullscreen;
 
+        let primaryWasInFullscreen = this._primaryMonitor.inFullscreen;
+
         this._updateFullscreen();
 
         let changed = false;
@@ -861,10 +867,15 @@ const Chrome = new Lang.Class({
                 break;
             }
         }
+
         if (changed) {
             this._updateVisibility();
             this._queueUpdateRegions();
         }
+
+        if (primaryWasInFullscreen != this._primaryMonitor.inFullscreen) {
+            this.emit('primary-fullscreen-changed', this._primaryMonitor.inFullscreen);
+        }
     },
 
     updateRegions: function() {
@@ -979,3 +990,5 @@ const Chrome = new Lang.Class({
         return false;
     }
 });
+
+Signals.addSignalMethods(Chrome.prototype);