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// Copyright 2017 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_EVENTS_OZONE_KEYBOARD_EVENT_AUTO_REPEAT_HANDLER_H_
#define UI_EVENTS_OZONE_KEYBOARD_EVENT_AUTO_REPEAT_HANDLER_H_
#include "base/callback.h"
#include "base/component_export.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
namespace ui {
class COMPONENT_EXPORT(EVENTS_OZONE) EventAutoRepeatHandler {
public:
class Delegate {
public:
// Gives the client a chance to flush the input queue
// cancelling possible spurios auto repeat keys.
// Useful under janky situations.
virtual void FlushInput(base::OnceClosure closure) = 0;
virtual void DispatchKey(unsigned int key,
unsigned int scan_code,
bool down,
bool repeat,
base::TimeTicks timestamp,
int device_id,
int flags) = 0;
};
explicit EventAutoRepeatHandler(Delegate* delegate);
EventAutoRepeatHandler(const EventAutoRepeatHandler&) = delete;
EventAutoRepeatHandler& operator=(const EventAutoRepeatHandler&) = delete;
~EventAutoRepeatHandler();
void UpdateKeyRepeat(unsigned int key,
unsigned int scan_code,
bool down,
bool suppress_auto_repeat,
int device_id);
void StopKeyRepeat();
// Configuration for key repeat.
bool IsAutoRepeatEnabled();
void SetAutoRepeatEnabled(bool enabled);
void SetAutoRepeatRate(const base::TimeDelta& delay,
const base::TimeDelta& interval);
void GetAutoRepeatRate(base::TimeDelta* delay, base::TimeDelta* interval);
private:
static constexpr unsigned int kInvalidKey = 0;
void StartKeyRepeat(unsigned int key, unsigned int scan_code, int device_id);
void ScheduleKeyRepeat(const base::TimeDelta& delay);
void OnRepeatTimeout(unsigned int sequence);
void OnRepeatCommit(unsigned int sequence);
// Key repeat state.
bool auto_repeat_enabled_ = true;
unsigned int repeat_key_ = kInvalidKey;
unsigned int repeat_scan_code_ = 0;
unsigned int repeat_sequence_ = 0;
int repeat_device_id_ = 0;
base::TimeDelta repeat_delay_;
base::TimeDelta repeat_interval_;
Delegate* delegate_ = nullptr;
base::WeakPtrFactory<EventAutoRepeatHandler> weak_ptr_factory_{this};
};
} // namespace ui
#endif // UI_EVENTS_OZONE_KEYBOARD_EVENT_AUTO_REPEAT_HANDLER_H_
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