[gnome-shell] Replace direct call to MessageTray::showNotification() with 'notify' signal in Source::notify()

[Marina Zhurakhinskaya <marinaz src gnome org>]

commit ee75355e713991604750eb3524ac0634dddebaf0
Author: Marina Zhurakhinskaya <marinaz redhat com>
Date:   Thu Jan 28 13:12:03 2010 -0500

    Replace direct call to MessageTray::showNotification() with 'notify' signal in Source::notify()
    
    This decouples Source and MessageTray, so Source doesn't need to know how
    MessageTray works.

 js/ui/messageTray.js |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index b045894..378dff0 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -59,6 +59,7 @@ function Source(id, createIcon) {
 Source.prototype = {
     _init: function(id, createIcon) {
         this.id = id;
+        this.text = null;
         if (createIcon)
             this.createIcon = createIcon;
     },
@@ -70,7 +71,8 @@ Source.prototype = {
     },
 
     notify: function(text) {
-        Main.messageTray.showNotification(new Notification(this.createIcon(ICON_SIZE), text));
+        this.text = text;
+        this.emit('notify');
     },
 
     clicked: function() {
@@ -145,6 +147,8 @@ MessageTray.prototype = {
         this._icons[source.id] = iconBox;
         this._sources[source.id] = source;
 
+        source.connect('notify', Lang.bind(this, this._onNotify));
+
         iconBox.connect('button-release-event', Lang.bind(this,
             function () {
                 source.clicked();
@@ -169,6 +173,11 @@ MessageTray.prototype = {
         return this._sources[id];
     },
 
+    _onNotify: function(source) {
+        let notification = new Notification(source.createIcon(ICON_SIZE), source.text);
+        this.showNotification(notification);
+    },
+
     _onMessageTrayEntered: function() {
         // Don't hide the message tray after a timeout if the user has moved the mouse over it.
         // We might have a timeout in place if the user moved the mouse away from the message tray for a very short period of time