src/cobalt/input/key_repeat_filter.h

/*
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COBALT_INPUT_KEY_REPEAT_FILTER_H_
#define COBALT_INPUT_KEY_REPEAT_FILTER_H_

#include <string>

#include "base/optional.h"
#include "base/timer.h"
#include "cobalt/dom/keyboard_event.h"
#include "cobalt/input/key_event_handler.h"

namespace cobalt {
namespace input {

class KeyRepeatFilter : public KeyEventHandler {
 public:
  explicit KeyRepeatFilter(const KeyboardEventCallback& callback);

  explicit KeyRepeatFilter(KeyEventHandler* filter);

  void HandleKeyboardEvent(
      const dom::KeyboardEvent::Data& keyboard_event) OVERRIDE;

 private:
  void HandleKeyDown(const dom::KeyboardEvent::Data& keyboard_event);
  void HandleKeyUp(const dom::KeyboardEvent::Data& keyboard_event);
  void FireKeyRepeatEvent();

  base::optional<dom::KeyboardEvent::Data> last_event_data_;

  base::RepeatingTimer<KeyRepeatFilter> key_repeat_timer_;
};

}  // namespace input
}  // namespace cobalt

#endif  // COBALT_INPUT_KEY_REPEAT_FILTER_H_