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 "ui/events/event_utils.h"
6
7#include <vector>
8
9#include "ui/events/event.h"
10#include "ui/gfx/display.h"
11#include "ui/gfx/screen.h"
12
13namespace ui {
14
15namespace {
16int g_custom_event_types = ET_LAST;
17}  // namespace
18
19scoped_ptr<Event> EventFromNative(const base::NativeEvent& native_event) {
20  scoped_ptr<Event> event;
21  EventType type = EventTypeFromNative(native_event);
22  switch(type) {
23    case ET_KEY_PRESSED:
24    case ET_KEY_RELEASED:
25      event.reset(new KeyEvent(native_event, false));
26      break;
27
28    case ET_TRANSLATED_KEY_PRESS:
29    case ET_TRANSLATED_KEY_RELEASE:
30      // These should not be generated by native events.
31      NOTREACHED();
32      break;
33
34    case ET_MOUSE_PRESSED:
35    case ET_MOUSE_DRAGGED:
36    case ET_MOUSE_RELEASED:
37    case ET_MOUSE_MOVED:
38    case ET_MOUSE_ENTERED:
39    case ET_MOUSE_EXITED:
40      event.reset(new MouseEvent(native_event));
41      break;
42
43    case ET_MOUSEWHEEL:
44      event.reset(new MouseWheelEvent(native_event));
45      break;
46
47    case ET_SCROLL_FLING_START:
48    case ET_SCROLL_FLING_CANCEL:
49    case ET_SCROLL:
50      event.reset(new ScrollEvent(native_event));
51      break;
52
53    case ET_TOUCH_RELEASED:
54    case ET_TOUCH_PRESSED:
55    case ET_TOUCH_MOVED:
56    case ET_TOUCH_CANCELLED:
57      event.reset(new TouchEvent(native_event));
58      break;
59
60    default:
61      break;
62  }
63  return event.Pass();
64}
65
66int RegisterCustomEventType() {
67  return ++g_custom_event_types;
68}
69
70base::TimeDelta EventTimeForNow() {
71  return base::TimeDelta::FromInternalValue(
72      base::TimeTicks::Now().ToInternalValue());
73}
74
75bool ShouldDefaultToNaturalScroll() {
76  return GetInternalDisplayTouchSupport() ==
77      gfx::Display::TOUCH_SUPPORT_AVAILABLE;
78}
79
80gfx::Display::TouchSupport GetInternalDisplayTouchSupport() {
81  gfx::Screen* screen = gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
82  // No screen in some unit tests.
83  if (!screen)
84    return gfx::Display::TOUCH_SUPPORT_UNKNOWN;
85  const std::vector<gfx::Display>& displays = screen->GetAllDisplays();
86  for (std::vector<gfx::Display>::const_iterator it = displays.begin();
87       it != displays.end(); ++it) {
88    if (it->IsInternal())
89      return it->touch_support();
90  }
91  return gfx::Display::TOUCH_SUPPORT_UNAVAILABLE;
92}
93
94}  // namespace ui
95