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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_SHELL_ACCELERATOR_CONTROLLER_H_
#define UI_AURA_SHELL_SHELL_ACCELERATOR_CONTROLLER_H_
#pragma once
#include <map>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura_shell/aura_shell_export.h"
#include "ui/base/accelerators/accelerator.h"
namespace ui {
class AcceleratorManager;
}
namespace aura_shell {
class ScreenshotDelegate;
// ShellAcceleratorController provides functions for registering or
// unregistering global keyboard accelerators, which are handled earlier than
// any windows. It also implements several handlers as an accelerator target.
class AURA_SHELL_EXPORT ShellAcceleratorController
: public ui::AcceleratorTarget {
public:
ShellAcceleratorController();
virtual ~ShellAcceleratorController();
// Register a global keyboard accelerator for the specified target. If
// multiple targets are registered for an accelerator, a target registered
// later has higher priority.
void Register(const ui::Accelerator& accelerator,
ui::AcceleratorTarget* target);
// Unregister the specified keyboard accelerator for the specified target.
void Unregister(const ui::Accelerator& accelerator,
ui::AcceleratorTarget* target);
// Unregister all keyboard accelerators for the specified target.
void UnregisterAll(ui::AcceleratorTarget* target);
// Activate the target associated with the specified accelerator.
// First, AcceleratorPressed handler of the most recently registered target
// is called, and if that handler processes the event (i.e. returns true),
// this method immediately returns. If not, we do the same thing on the next
// target, and so on.
// Returns true if an accelerator was activated.
bool Process(const ui::Accelerator& accelerator);
// Overridden from ui::AcceleratorTarget:
virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
void SetScreenshotDelegate(ScreenshotDelegate* screenshot_delegate);
private:
// Initialize the accelerators this class handles as a target.
void Init();
scoped_ptr<ui::AcceleratorManager> accelerator_manager_;
scoped_ptr<ScreenshotDelegate> screenshot_delegate_;
// A map from accelerators to the AcceleratorAction values, which are used in
// the implementation.
std::map<ui::Accelerator, int> accelerators_;
DISALLOW_COPY_AND_ASSIGN(ShellAcceleratorController);
};
} // namespace aura_shell
#endif // UI_AURA_SHELL_SHELL_ACCELERATOR_CONTROLLER_H_
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