[gnome-shell] Only show the primary monitor region in the workspace thumbnails

[Alexander Larsson <alexl src gnome org>]

commit a1a068a377b1b8f729cd89d5e803c672bd61d715
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Feb 28 20:09:23 2011 +0100

    Only show the primary monitor region in the workspace thumbnails
    
    Make the thumbnail the size of the primary monitor and only show
    the windows from that area.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=609258

 js/ui/workspaceThumbnail.js |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/js/ui/workspaceThumbnail.js b/js/ui/workspaceThumbnail.js
index 9aeab98..2446abb 100644
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@@ -169,7 +169,8 @@ WorkspaceThumbnail.prototype = {
         this._background = new Clutter.Clone({ source: global.background_actor });
         this._contents.add_actor(this._background);
 
-        this.setPorthole(0, 0, global.screen_width, global.screen_height);
+        let monitor = global.get_primary_monitor();
+        this.setPorthole(monitor.x, monitor.y, monitor.width, monitor.height);
 
         let windows = global.get_window_actors().filter(this._isMyWindow, this);
 
@@ -442,11 +443,12 @@ ThumbnailsBox.prototype = {
 
         // The "porthole" is the portion of the screen that we show in the workspaces
         let panelHeight = Main.panel.actor.height;
+        let monitor = global.get_primary_monitor();
         this._porthole = {
-            x: 0,
-            y: panelHeight,
-            width: global.screen_width,
-            height: global.screen_height - panelHeight
+            x: monitor.x,
+            y: monitor.y + panelHeight,
+            width: monitor.width,
+            height: monitor.height - panelHeight
         };
 
         this.addThumbnails(0, global.screen.n_workspaces);