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// Copyright (c) 2012 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.
#ifndef ASH_WM_ACTIVATION_CONTROLLER_H_
#define ASH_WM_ACTIVATION_CONTROLLER_H_
#pragma once
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/client/activation_client.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/root_window_observer.h"
#include "ui/aura/window_observer.h"
#include "ash/ash_export.h"
namespace ash {
namespace internal {
// Exported for unit tests.
class ASH_EXPORT ActivationController
: public aura::client::ActivationClient,
public aura::WindowObserver,
public aura::EnvObserver,
public aura::RootWindowObserver {
public:
ActivationController();
virtual ~ActivationController();
// Returns true if |window| exists within a container that supports
// activation.
static aura::Window* GetActivatableWindow(aura::Window* window);
// Overridden from aura::client::ActivationClient:
virtual void ActivateWindow(aura::Window* window) OVERRIDE;
virtual void DeactivateWindow(aura::Window* window) OVERRIDE;
virtual aura::Window* GetActiveWindow() OVERRIDE;
virtual bool CanFocusWindow(aura::Window* window) const OVERRIDE;
// Overridden from aura::WindowObserver:
virtual void OnWindowVisibilityChanged(aura::Window* window,
bool visible) OVERRIDE;
virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
// Overridden from aura::EnvObserver:
virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
// Overridden from aura::RootWindowObserver:
virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
private:
// Shifts activation to the next window, ignoring |window|.
void ActivateNextWindow(aura::Window* window);
// Returns the next window that should be activated, ignoring |ignore|.
aura::Window* GetTopmostWindowToActivate(aura::Window* ignore) const;
// Returns the next window that should be activated in |container| ignoring
// the window |ignore|.
aura::Window* GetTopmostWindowToActivateInContainer(
aura::Window* container,
aura::Window* ignore) const;
// True inside ActivateWindow(). Used to prevent recursion of focus
// change notifications causing activation.
bool updating_activation_;
DISALLOW_COPY_AND_ASSIGN(ActivationController);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_ACTIVATION_CONTROLLER_H_
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