1// Copyright (c) 2012 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#ifndef ASH_WM_STACKING_CONTROLLER_H_
6#define ASH_WM_STACKING_CONTROLLER_H_
7
8#include "ash/ash_export.h"
9#include "base/basictypes.h"
10#include "base/compiler_specific.h"
11#include "base/memory/scoped_ptr.h"
12#include "ui/aura/client/window_tree_client.h"
13
14namespace ash {
15class AlwaysOnTopController;
16
17class ASH_EXPORT StackingController : public aura::client::WindowTreeClient {
18 public:
19  StackingController();
20  virtual ~StackingController();
21
22  // Overridden from aura::client::WindowTreeClient:
23  virtual aura::Window* GetDefaultParent(aura::Window* context,
24                                         aura::Window* window,
25                                         const gfx::Rect& bounds) OVERRIDE;
26
27 private:
28  // Returns corresponding system modal container for a modal window.
29  // If screen lock is not active, all system modal windows are placed into the
30  // normal modal container.
31  // Otherwise those that originate from LockScreen container and above are
32  // placed in the screen lock modal container.
33  aura::Window* GetSystemModalContainer(aura::Window* root,
34                                        aura::Window* window) const;
35
36  DISALLOW_COPY_AND_ASSIGN(StackingController);
37};
38
39}  // namespace ash
40
41#endif  // ASH_WM_STACKING_CONTROLLER_H_
42