[gnome-shell] workspaceThumbnail: forbid manipulations of removed workspaces

[Owen Taylor <otaylor src gnome org>]

commit 45fe44da85b8fe199d82bf5dd3d12bdc164a81cd
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Feb 14 17:09:04 2011 -0500

    workspaceThumbnail: forbid manipulations of removed workspaces
    
    Don't allow dragging onto a removed workspace or activating it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=642329

 js/ui/workspaceThumbnail.js |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/workspaceThumbnail.js b/js/ui/workspaceThumbnail.js
index 6d44e23..ab9ea90 100644
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@@ -328,6 +328,9 @@ WorkspaceThumbnail.prototype = {
     },
 
     _activate : function (clone, time) {
+        if (this.state > ThumbnailState.NORMAL)
+            return;
+
         // a click on the already current workspace should go back to the main view
         if (this.metaWorkspace == global.screen.get_active_workspace())
             Main.overview.hide();
@@ -337,6 +340,9 @@ WorkspaceThumbnail.prototype = {
 
     // Draggable target interface
     handleDragOver : function(source, actor, x, y, time) {
+        if (this.state > ThumbnailState.NORMAL)
+            return DND.DragMotionResult.CONTINUE;
+
         if (source.realWindow)
             return DND.DragMotionResult.MOVE_DROP;
         if (source.shellWorkspaceLaunch)
@@ -346,6 +352,9 @@ WorkspaceThumbnail.prototype = {
     },
 
     acceptDrop : function(source, actor, x, y, time) {
+        if (this.state > ThumbnailState.NORMAL)
+            return false;
+
         if (source.realWindow) {
             let win = source.realWindow;
             if (this._isMyWindow(win))