1 files changed, 47 insertions, 0 deletions
diff --git a/ui/base/gtk/gtk_windowing.cc b/ui/base/gtk/gtk_windowing.cc
new file mode 100644
index 0000000..7f26b84
--- /dev/null
+++ b/ui/base/gtk/gtk_windowing.cc
@@ -0,0 +1,47 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/base/gtk/gtk_windowing.h"
+
+#include <gdk/gdkx.h>
+
+#include "base/logging.h"
+#include "ui/base/x/x11_util.h"
+
+namespace ui {
+
+void StackPopupWindow(GtkWidget* popup, GtkWidget* toplevel) {
+  DCHECK(GTK_IS_WINDOW(popup) && GTK_WIDGET_TOPLEVEL(popup) &&
+         GTK_WIDGET_REALIZED(popup));
+  DCHECK(GTK_IS_WINDOW(toplevel) && GTK_WIDGET_TOPLEVEL(toplevel) &&
+         GTK_WIDGET_REALIZED(toplevel));
+
+  // Stack the |popup| window directly above the |toplevel| window.
+  // The popup window is a direct child of the root window, so we need to
+  // find a similar ancestor for the toplevel window (which might have been
+  // reparented by a window manager).  We grab the server while we're doing
+  // this -- otherwise, we'll get an error if the window manager reparents the
+  // toplevel window right after we call GetHighestAncestorWindow().
+  gdk_x11_display_grab(gtk_widget_get_display(toplevel));
+  XID toplevel_window_base = ui::GetHighestAncestorWindow(
+      ui::GetX11WindowFromGtkWidget(toplevel),
+      ui::GetX11RootWindow());
+  if (toplevel_window_base) {
+    XID window_xid = ui::GetX11WindowFromGtkWidget(popup);
+    XID window_parent = ui::GetParentWindow(window_xid);
+    if (window_parent == ui::GetX11RootWindow()) {
+      ui::RestackWindow(window_xid, toplevel_window_base, true);
+    } else {
+      // The window manager shouldn't reparent override-redirect windows.
+      DLOG(ERROR) << "override-redirect window " << window_xid
+                  << "'s parent is " << window_parent
+                  << ", rather than root window "
+                  << ui::GetX11RootWindow();
+    }
+  }
+  gdk_x11_display_ungrab(gtk_widget_get_display(toplevel));
+}
+
+}  // namespace ui
+