1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ash/wm/system_gesture_event_filter.h"
6
7#include "ash/ash_switches.h"
8#include "ash/metrics/user_metrics_recorder.h"
9#include "ash/shell.h"
10#include "ash/touch/touch_uma.h"
11#include "ash/wm/gestures/long_press_affordance_handler.h"
12#include "ash/wm/gestures/overview_gesture_handler.h"
13#include "ash/wm/gestures/shelf_gesture_handler.h"
14#include "ui/events/event.h"
15#include "ui/events/event_constants.h"
16
17#if defined(OS_CHROMEOS) && defined(USE_X11)
18#include "ui/events/x/touch_factory_x11.h"
19#endif
20
21namespace ash {
22
23SystemGestureEventFilter::SystemGestureEventFilter()
24    : long_press_affordance_(new LongPressAffordanceHandler),
25      overview_gesture_handler_(new OverviewGestureHandler),
26      shelf_gesture_handler_(new ShelfGestureHandler()) {
27}
28
29SystemGestureEventFilter::~SystemGestureEventFilter() {
30}
31
32void SystemGestureEventFilter::OnMouseEvent(ui::MouseEvent* event) {
33#if defined(OS_CHROMEOS) && defined(USE_X11)
34  if (event->type() == ui::ET_MOUSE_PRESSED && event->native_event() &&
35      ui::TouchFactory::GetInstance()->IsTouchDevicePresent() &&
36      Shell::GetInstance()->delegate()) {
37    Shell::GetInstance()->metrics()->RecordUserMetricsAction(UMA_MOUSE_DOWN);
38  }
39#endif
40}
41
42void SystemGestureEventFilter::OnScrollEvent(ui::ScrollEvent* event) {
43  if (overview_gesture_handler_ &&
44      overview_gesture_handler_->ProcessScrollEvent(*event)) {
45    event->StopPropagation();
46  }
47}
48
49void SystemGestureEventFilter::OnTouchEvent(ui::TouchEvent* event) {
50  aura::Window* target = static_cast<aura::Window*>(event->target());
51  ash::TouchUMA::GetInstance()->RecordTouchEvent(target, *event);
52}
53
54void SystemGestureEventFilter::OnGestureEvent(ui::GestureEvent* event) {
55  aura::Window* target = static_cast<aura::Window*>(event->target());
56  ash::TouchUMA::GetInstance()->RecordGestureEvent(target, *event);
57  long_press_affordance_->ProcessEvent(target, event);
58
59  if (overview_gesture_handler_ &&
60      overview_gesture_handler_->ProcessGestureEvent(*event)) {
61    event->StopPropagation();
62    return;
63  }
64
65  if (event->type() == ui::ET_GESTURE_WIN8_EDGE_SWIPE &&
66      shelf_gesture_handler_->ProcessGestureEvent(*event)) {
67    // Do not stop propagation, since the immersive fullscreen controller may
68    // need to handle this event.
69    return;
70  }
71}
72
73}  // namespace ash
74