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// Copyright 2014 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_GESTURES_GESTURE_PROVIDER_AURA_H_
#define UI_EVENTS_GESTURES_GESTURE_PROVIDER_AURA_H_
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/macros.h"
#include "ui/events/event.h"
#include "ui/events/events_export.h"
#include "ui/events/gesture_detection/filtered_gesture_provider.h"
#include "ui/events/gesture_detection/gesture_event_data_packet.h"
#include "ui/events/gesture_detection/touch_disposition_gesture_filter.h"
#include "ui/events/gestures/motion_event_aura.h"
namespace ui {
class GestureProviderAura;
class EVENTS_EXPORT GestureProviderAuraClient {
public:
virtual ~GestureProviderAuraClient() {}
virtual void OnGestureEvent(GestureConsumer* consumer,
GestureEvent* event) = 0;
};
// Provides gesture detection and dispatch given a sequence of touch events
// and touch event acks.
class EVENTS_EXPORT GestureProviderAura : public GestureProviderClient {
public:
GestureProviderAura(GestureConsumer* consumer,
GestureProviderAuraClient* client);
~GestureProviderAura() override;
void set_gesture_consumer(GestureConsumer* consumer) {
gesture_consumer_ = consumer;
}
FilteredGestureProvider& filtered_gesture_provider() {
return filtered_gesture_provider_;
}
bool OnTouchEvent(TouchEvent* event);
void OnTouchEventAck(uint32_t unique_touch_event_id,
bool event_consumed,
bool is_source_touch_event_set_blocking);
const MotionEventAura& pointer_state() { return pointer_state_; }
std::vector<std::unique_ptr<GestureEvent>> GetAndResetPendingGestures();
void OnTouchEnter(int pointer_id, float x, float y);
void ResetGestureHandlingState();
// Synthesizes gesture end events and sends to the associated consumer.
void SendSynthesizedEndEvents();
// GestureProviderClient implementation
void OnGestureEvent(const GestureEventData& gesture) override;
bool RequiresDoubleTapGestureEvents() const override;
private:
GestureProviderAuraClient* client_;
MotionEventAura pointer_state_;
FilteredGestureProvider filtered_gesture_provider_;
bool handling_event_;
std::vector<std::unique_ptr<GestureEvent>> pending_gestures_;
// |gesture_consumer_| must outlive this object.
GestureConsumer* gesture_consumer_;
DISALLOW_COPY_AND_ASSIGN(GestureProviderAura);
};
} // namespace ui
#endif // UI_EVENTS_GESTURES_GESTURE_PROVIDER_AURA_H_
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