fix bug #14131. popup windows on modal dialogs should work now.

widget/src/gtk/nsGtkEventHandler.cpp

@@ -843,6 +843,9 @@ handle_gdk_event (GdkEvent *event, gpointer data)
 
       nsWindow *window = (nsWindow *)gtk_object_get_data (object, "nsWindow");
       GtkWidget *current_grab = gtk_grab_get_current();
+      if (window->GrabInProgress()) {
+        goto handle_as_superwin;
+      }
 
       if (current_grab) {
         // walk up the list of our parents looking for the widget.

widget/src/gtk/nsWindow.cpp

@@ -59,6 +59,8 @@ gint handle_toplevel_focus_out(
 
 // this is the nsWindow with the focus
 nsWindow  *nsWindow::focusWindow = NULL;
+// are we grabbing?
+PRBool     nsWindow::mIsGrabbing = PR_FALSE;
 
 //-------------------------------------------------------------------------
 //
@@ -390,6 +392,7 @@ NS_IMETHODIMP nsWindow::CaptureRollupEvents(nsIRollupListener * aListener,
     }
     else
       {
+        mIsGrabbing = PR_TRUE;
         int ret = gdk_pointer_grab (GDK_SUPERWIN(mSuperWin)->bin_window, PR_TRUE,(GdkEventMask)
                                     (GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
                                      GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
@@ -406,6 +409,7 @@ NS_IMETHODIMP nsWindow::CaptureRollupEvents(nsIRollupListener * aListener,
 #ifdef DEBUG_pavlov
     printf("ungrabbing widget\n");
 #endif
+    mIsGrabbing = PR_FALSE;
     gdk_pointer_ungrab(GDK_CURRENT_TIME);
     //    gtk_grab_remove(grabWidget);
   }
@@ -1775,7 +1779,7 @@ NS_IMETHODIMP nsWindow::Show(PRBool bState)
     {
       gtk_widget_hide(mShell);
       gtk_widget_hide(mMozArea);
-      gtk_widget_unmap(mShell);
+      //gtk_widget_unmap(mShell);
     } 
    
     // For some strange reason, gtk_widget_hide() does not seem to
@@ -1783,8 +1787,6 @@ NS_IMETHODIMP nsWindow::Show(PRBool bState)
     //    gtk_widget_unmap(mWidget);
   }
 
-  mShown = bState;
-
   return NS_OK;
 }
 
@@ -2497,6 +2499,11 @@ nsWindow::GetMozArea()
   return (GtkWidget *)mMozAreaClosestParent;
 }
 
+PRBool
+nsWindow::GrabInProgress(void)
+{
+  return nsWindow::mIsGrabbing;
+}
 
 /* virtual */ GdkWindow *
 nsWindow::GetRenderWindow(GtkObject * aGtkObject)

widget/src/gtk/nsWindow.h

@@ -135,6 +135,9 @@ public:
 
   // Return the Gdk window used for rendering
   virtual GdkWindow * GetRenderWindow(GtkObject * aGtkWidget);
+
+  // grab in progress
+  PRBool GrabInProgress(void);
   //  XXX Chris - fix these
   //  virtual void OnButtonPressSignal(GdkEventButton * aGdkButtonEvent);
 
@@ -187,6 +190,8 @@ protected:
   GtkWidget   *mMozAreaClosestParent;
 
   nsIMenuBar *mMenuBar;
+  // are we doing a grab?
+  static PRBool mIsGrabbing;
 private:
   nsresult     SetIcon(GdkPixmap *window_pixmap, 
                        GdkBitmap *window_mask);