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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.
#include "ui/events/gestures/gesture_provider_aura.h"
#include <utility>
#include "base/auto_reset.h"
#include "base/logging.h"
#include "ui/events/event.h"
#include "ui/events/gesture_detection/gesture_configuration.h"
#include "ui/events/gesture_detection/gesture_event_data.h"
#include "ui/events/gesture_detection/gesture_provider_config_helper.h"
namespace ui {
GestureProviderAura::GestureProviderAura(GestureConsumer* consumer,
GestureProviderAuraClient* client)
: client_(client),
filtered_gesture_provider_(
GetGestureProviderConfig(GestureProviderConfigType::CURRENT_PLATFORM),
this),
handling_event_(false),
gesture_consumer_(consumer) {
filtered_gesture_provider_.SetDoubleTapSupportForPlatformEnabled(false);
}
GestureProviderAura::~GestureProviderAura() {}
bool GestureProviderAura::OnTouchEvent(TouchEvent* event) {
if (!pointer_state_.OnTouch(*event))
return false;
auto result = filtered_gesture_provider_.OnTouchEvent(pointer_state_);
if (!result.succeeded)
return false;
event->set_may_cause_scrolling(result.moved_beyond_slop_region);
pointer_state_.CleanupRemovedTouchPoints(*event);
return true;
}
void GestureProviderAura::OnTouchEventAck(uint32_t unique_event_id,
bool event_consumed) {
DCHECK(pending_gestures_.empty());
DCHECK(!handling_event_);
base::AutoReset<bool> handling_event(&handling_event_, true);
filtered_gesture_provider_.OnTouchEventAck(unique_event_id, event_consumed);
}
void GestureProviderAura::OnGestureEvent(
const GestureEventData& gesture) {
scoped_ptr<ui::GestureEvent> event(
new ui::GestureEvent(gesture.x, gesture.y, gesture.flags,
gesture.time - base::TimeTicks(), gesture.details));
if (!handling_event_) {
// Dispatching event caused by timer.
client_->OnGestureEvent(gesture_consumer_, event.get());
} else {
// Memory managed by ScopedVector pending_gestures_.
pending_gestures_.push_back(std::move(event));
}
}
ScopedVector<GestureEvent>* GestureProviderAura::GetAndResetPendingGestures() {
if (pending_gestures_.empty())
return NULL;
// Caller is responsible for deleting old_pending_gestures.
ScopedVector<GestureEvent>* old_pending_gestures =
new ScopedVector<GestureEvent>();
old_pending_gestures->swap(pending_gestures_);
return old_pending_gestures;
}
} // namespace content
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