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// Copyright 2015 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 COMPONENTS_EXO_KEYBOARD_H_
#define COMPONENTS_EXO_KEYBOARD_H_
#include <vector>
#include "base/macros.h"
#include "components/exo/surface_observer.h"
#include "components/exo/wm_helper.h"
#include "ui/events/event_handler.h"
namespace ui {
enum class DomCode;
class KeyEvent;
}
namespace exo {
class KeyboardDelegate;
class KeyboardDeviceConfigurationDelegate;
class Surface;
// This class implements a client keyboard that represents one or more keyboard
// devices.
class Keyboard : public ui::EventHandler,
public WMHelper::FocusObserver,
public WMHelper::InputDeviceEventObserver,
public WMHelper::MaximizeModeObserver,
public SurfaceObserver {
public:
explicit Keyboard(KeyboardDelegate* delegate);
~Keyboard() override;
bool HasDeviceConfigurationDelegate() const;
void SetDeviceConfigurationDelegate(
KeyboardDeviceConfigurationDelegate* delegate);
// Overridden from ui::EventHandler:
void OnKeyEvent(ui::KeyEvent* event) override;
// Overridden WMHelper::FocusObserver:
void OnWindowFocused(aura::Window* gained_focus,
aura::Window* lost_focus) override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
// Overridden from ui::InputDeviceEventObserver:
void OnKeyboardDeviceConfigurationChanged() override;
// Overridden from WMHelper::MaximizeModeObserver:
void OnMaximizeModeStarted() override;
void OnMaximizeModeEnding() override;
void OnMaximizeModeEnded() override;
private:
// Returns the effective focus for |window|.
Surface* GetEffectiveFocus(aura::Window* window) const;
// The delegate instance that all events except for events about device
// configuration are dispatched to.
KeyboardDelegate* const delegate_;
// The delegate instance that events about device configuration are dispatched
// to.
KeyboardDeviceConfigurationDelegate* device_configuration_delegate_ = nullptr;
// The current focus surface for the keyboard.
Surface* focus_ = nullptr;
// Vector of currently pressed keys.
std::vector<ui::DomCode> pressed_keys_;
// Current set of modifier flags.
int modifier_flags_ = 0;
DISALLOW_COPY_AND_ASSIGN(Keyboard);
};
} // namespace exo
#endif // COMPONENTS_EXO_KEYBOARD_H_
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