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// 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.
#include "ui/aura/gestures/gesture_recognizer_aura.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
#include "ui/aura/event.h"
#include "ui/aura/gestures/gesture_sequence.h"
#include "ui/base/events.h"
namespace {
// This is used to pop a std::queue when returning from a function.
class ScopedPop {
public:
ScopedPop(std::queue<aura::TouchEvent*>* queue) : queue_(queue) {
}
~ScopedPop() {
delete queue_->front();
queue_->pop();
}
private:
std::queue<aura::TouchEvent*>* queue_;
DISALLOW_COPY_AND_ASSIGN(ScopedPop);
};
} // namespace
namespace aura {
////////////////////////////////////////////////////////////////////////////////
// GestureRecognizerAura, public:
GestureRecognizerAura::GestureRecognizerAura()
: default_sequence_(new GestureSequence()) {
}
GestureRecognizerAura::~GestureRecognizerAura() {
}
////////////////////////////////////////////////////////////////////////////////
// GestureRecognizerAura, private:
GestureSequence::Gestures* GestureRecognizerAura::ProcessTouchEventForGesture(
const TouchEvent& event,
ui::TouchStatus status) {
return default_sequence_->ProcessTouchEventForGesture(event, status);
}
void GestureRecognizerAura::QueueTouchEventForGesture(Window* window,
const TouchEvent& event) {
if (!event_queue_[window])
event_queue_[window] = new std::queue<TouchEvent*>();
event_queue_[window]->push(event.Copy());
}
GestureSequence::Gestures* GestureRecognizerAura::AdvanceTouchQueue(
Window* window,
bool processed) {
if (!event_queue_[window]) {
LOG(ERROR) << "Trying to advance an empty gesture queue for " << window;
return NULL;
}
ScopedPop pop(event_queue_[window]);
TouchEvent* event = event_queue_[window]->front();
GestureSequence* sequence = window_sequence_[window];
if (!sequence) {
sequence = new GestureSequence();
window_sequence_[window] = sequence;
}
return sequence->ProcessTouchEventForGesture(*event,
processed ? ui::TOUCH_STATUS_CONTINUE : ui::TOUCH_STATUS_UNKNOWN);
}
void GestureRecognizerAura::FlushTouchQueue(Window* window) {
if (window_sequence_[window]) {
delete window_sequence_[window];
window_sequence_.erase(window);
}
if (event_queue_[window]) {
delete event_queue_[window];
event_queue_.erase(window);
}
}
// GestureRecognizer, static
GestureRecognizer* GestureRecognizer::Create() {
return new GestureRecognizerAura();
}
} // namespace aura
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