blob: 99573566509ced3bfd8f703bfce29a0e9a57f18c [file] [log] [blame]
// Copyright (c) 2012 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_RECOGNIZER_IMPL_H_
#define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
#include <map>
#include <vector>
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "ui/events/event_constants.h"
#include "ui/events/events_export.h"
#include "ui/events/gestures/gesture_provider_impl.h"
#include "ui/events/gestures/gesture_recognizer.h"
#include "ui/gfx/point.h"
namespace ui {
class GestureConsumer;
class GestureEvent;
class GestureEventHelper;
class TouchEvent;
// TODO(tdresser): Once the unified gesture recognition process sticks
// (crbug.com/332418), GestureRecognizerImpl can be cleaned up
// significantly.
class EVENTS_EXPORT GestureRecognizerImpl : public GestureRecognizer,
public GestureProviderImplClient {
public:
typedef std::map<int, GestureConsumer*> TouchIdToConsumerMap;
GestureRecognizerImpl();
~GestureRecognizerImpl() override;
std::vector<GestureEventHelper*>& helpers() { return helpers_; }
// Overridden from GestureRecognizer
GestureConsumer* GetTouchLockedTarget(
const TouchEvent& event) override;
GestureConsumer* GetTargetForGestureEvent(
const GestureEvent& event) override;
GestureConsumer* GetTargetForLocation(
const gfx::PointF& location, int source_device_id) override;
void TransferEventsTo(GestureConsumer* current_consumer,
GestureConsumer* new_consumer) override;
bool GetLastTouchPointForTarget(GestureConsumer* consumer,
gfx::PointF* point) override;
bool CancelActiveTouches(GestureConsumer* consumer) override;
protected:
virtual GestureProviderImpl* GetGestureProviderForConsumer(
GestureConsumer* c);
private:
// Sets up the target consumer for gestures based on the touch-event.
void SetupTargets(const TouchEvent& event, GestureConsumer* consumer);
void DispatchGestureEvent(GestureEvent* event);
// Overridden from GestureRecognizer
bool ProcessTouchEventPreDispatch(const TouchEvent& event,
GestureConsumer* consumer) override;
Gestures* ProcessTouchEventPostDispatch(
const TouchEvent& event,
ui::EventResult result,
GestureConsumer* consumer) override;
Gestures* ProcessTouchEventOnAsyncAck(
const TouchEvent& event,
ui::EventResult result,
GestureConsumer* consumer) override;
bool CleanupStateForConsumer(GestureConsumer* consumer) override;
void AddGestureEventHelper(GestureEventHelper* helper) override;
void RemoveGestureEventHelper(GestureEventHelper* helper) override;
// Overridden from GestureProviderImplClient
void OnGestureEvent(GestureEvent* event) override;
// Convenience method to find the GestureEventHelper that can dispatch events
// to a specific |consumer|.
GestureEventHelper* FindDispatchHelperForConsumer(GestureConsumer* consumer);
std::map<GestureConsumer*, GestureProviderImpl*> consumer_gesture_provider_;
// Both |touch_id_target_| and |touch_id_target_for_gestures_| map a touch-id
// to its target window. touch-ids are removed from |touch_id_target_| on
// ET_TOUCH_RELEASE and ET_TOUCH_CANCEL. |touch_id_target_for_gestures_| are
// removed in ConsumerDestroyed().
TouchIdToConsumerMap touch_id_target_;
TouchIdToConsumerMap touch_id_target_for_gestures_;
std::vector<GestureEventHelper*> helpers_;
DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl);
};
// Provided only for testing:
EVENTS_EXPORT void SetGestureRecognizerForTesting(
GestureRecognizer* gesture_recognizer);
} // namespace ui
#endif // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_