From 6a9b1996e41abd187d27e9a3e3034496077fe926 Mon Sep 17 00:00:00 2001
From: Giovanni Campagna <gcampagna@src.gnome.org>
Date: Thu, 16 Aug 2012 21:11:54 +0200
Subject: [PATCH] ShellIdleMonitor: turn it into a singleton

It doesn't make sense to have multiple ShellIdleMonitors, since
each has its own GDK filter function, but they all get the same
events. In preparation for having it accessed from other places
than the message tray, make it a singleton.

https://bugzilla.gnome.org/show_bug.cgi?id=682041
---
 js/ui/messageTray.js     |  2 +-
 src/shell-idle-monitor.c | 16 +++++++++++-----
 src/shell-idle-monitor.h |  2 +-
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 1ce114e6d..eabf6a7d5 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1508,7 +1508,7 @@ const MessageTray = new Lang.Class({
         this._idleMonitorWatchId = 0;
         this._backFromAway = false;
 
-        this.idleMonitor = new Shell.IdleMonitor();
+        this.idleMonitor = Shell.IdleMonitor.get();
 
         // To simplify the summary item animation code, we pretend
         // that there's an invisible SummaryItem to the left of the
diff --git a/src/shell-idle-monitor.c b/src/shell-idle-monitor.c
index 22581d100..592f4772c 100644
--- a/src/shell-idle-monitor.c
+++ b/src/shell-idle-monitor.c
@@ -316,15 +316,21 @@ shell_idle_monitor_init (ShellIdleMonitor *monitor)
         monitor->priv->counter = None;
 }
 
+/**
+ * shell_idle_monitor_get:
+ *
+ * Returns: (transfer none): the global #ShellIdleMonitor.
+ */
 ShellIdleMonitor *
-shell_idle_monitor_new (void)
+shell_idle_monitor_get (void)
 {
-        GObject *idle_monitor;
+        static ShellIdleMonitor *idle_monitor;
 
-        idle_monitor = g_object_new (SHELL_TYPE_IDLE_MONITOR,
-                                     NULL);
+        if (G_UNLIKELY (idle_monitor == NULL))
+                idle_monitor = g_object_new (SHELL_TYPE_IDLE_MONITOR,
+                                             NULL);
 
-        return SHELL_IDLE_MONITOR (idle_monitor);
+        return idle_monitor;
 }
 
 static gboolean
diff --git a/src/shell-idle-monitor.h b/src/shell-idle-monitor.h
index 1086d9216..2fcd0820b 100644
--- a/src/shell-idle-monitor.h
+++ b/src/shell-idle-monitor.h
@@ -56,7 +56,7 @@ typedef void (*ShellIdleMonitorWatchFunc) (ShellIdleMonitor *monitor,
 
 GType              shell_idle_monitor_get_type     (void);
 
-ShellIdleMonitor * shell_idle_monitor_new          (void);
+ShellIdleMonitor * shell_idle_monitor_get          (void);
 
 guint              shell_idle_monitor_add_watch    (ShellIdleMonitor         *monitor,
                                                     guint                     interval,