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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_DELEGATE_H_
#define COMPONENTS_EXO_KEYBOARD_DELEGATE_H_
#include <vector>
#include "base/time/time.h"
namespace ui {
enum class DomCode;
}
namespace exo {
class Keyboard;
class Surface;
// Handles events on keyboards in context-specific ways.
class KeyboardDelegate {
public:
// Called at the top of the keyboard's destructor, to give observers a
// chance to remove themselves.
virtual void OnKeyboardDestroying(Keyboard* keyboard) = 0;
// This should return true if |surface| is a valid target for this keyboard.
// E.g. the surface is owned by the same client as the keyboard.
virtual bool CanAcceptKeyboardEventsForSurface(Surface* surface) const = 0;
// Called when keyboard focus enters a new valid target surface.
virtual void OnKeyboardEnter(
Surface* surface,
const std::vector<ui::DomCode>& pressed_keys) = 0;
// Called when keyboard focus leaves a valid target surface.
virtual void OnKeyboardLeave(Surface* surface) = 0;
// Called when pkeyboard key state changed. |pressed| is true when |key|
// was pressed and false if it was released.
virtual void OnKeyboardKey(base::TimeDelta time_stamp,
ui::DomCode key,
bool pressed) = 0;
// Called when keyboard modifier state changed.
virtual void OnKeyboardModifiers(int modifier_flags) = 0;
protected:
virtual ~KeyboardDelegate() {}
};
} // namespace exo
#endif // COMPONENTS_EXO_KEYBOARD_DELEGATE_H_
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