ui/base/gtk/gtk_windowing.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/base/gtk/gtk_windowing.h"
   6
   7 #include <gdk/gdkx.h>
   8
   9 #include "base/logging.h"
  10 #include "ui/base/x/x11_util.h"
  11 #include "ui/gfx/gtk_compat.h"
  12
  13 namespace ui {
  14
  15 void StackPopupWindow(GtkWidget* popup, GtkWidget* toplevel) {
  16   DCHECK(GTK_IS_WINDOW(popup) && gtk_widget_is_toplevel(popup) &&
  17          gtk_widget_get_realized(popup));
  18   DCHECK(GTK_IS_WINDOW(toplevel) && gtk_widget_is_toplevel(toplevel) &&
  19          gtk_widget_get_realized(toplevel));
  20
  21   // Stack the |popup| window directly above the |toplevel| window.
  22   // The popup window is a direct child of the root window, so we need to
  23   // find a similar ancestor for the toplevel window (which might have been
  24   // reparented by a window manager).  We grab the server while we're doing
  25   // this -- otherwise, we'll get an error if the window manager reparents the
  26   // toplevel window right after we call GetHighestAncestorWindow().
  27   gdk_x11_display_grab(gtk_widget_get_display(toplevel));
  28   XID toplevel_window_base = ui::GetHighestAncestorWindow(
  29       ui::GetX11WindowFromGtkWidget(toplevel),
  30       ui::GetX11RootWindow());
  31   if (toplevel_window_base) {
  32     XID window_xid = ui::GetX11WindowFromGtkWidget(popup);
  33     XID window_parent = ui::GetParentWindow(window_xid);
  34     if (window_parent == ui::GetX11RootWindow()) {
  35       ui::RestackWindow(window_xid, toplevel_window_base, true);
  36     } else {
  37       // The window manager shouldn't reparent override-redirect windows.
  38       DLOG(ERROR) << "override-redirect window " << window_xid
  39                   << "'s parent is " << window_parent
  40                   << ", rather than root window "
  41                   << ui::GetX11RootWindow();
  42     }
  43   }
  44   gdk_x11_display_ungrab(gtk_widget_get_display(toplevel));
  45 }
  46
  47 }  // namespace ui
  48