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// 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.
#ifndef UI_AURA_SHELL_ACTIVATION_CONTROLLER_H_
#define UI_AURA_SHELL_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/root_window_observer.h"
#include "ui/aura/window_observer.h"
namespace aura_shell {
namespace internal {
class ActivationController : public aura::ActivationClient,
public aura::WindowObserver,
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::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 OnWindowDestroyed(aura::Window* window) OVERRIDE;
// Overridden from aura::RootWindowObserver:
virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
#if defined(UNIT_TEST)
void set_default_container_for_test(aura::Window* window) {
default_container_for_test_ = window;
}
#endif
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;
// True inside ActivateWindow(). Used to prevent recursion of focus
// change notifications causing activation.
bool updating_activation_;
// For tests that are not running with a Shell instance,
// ActivationController's attempts to locate the next active window in
// GetTopmostWindowToActivate() will crash, so we provide this way for such
// tests to specify a default container.
aura::Window* default_container_for_test_;
DISALLOW_COPY_AND_ASSIGN(ActivationController);
};
} // namespace internal
} // namespace aura_shell
#endif // UI_AURA_SHELL_ACTIVATION_CONTROLLER_H_
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