1// Copyright 2013 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 "content/browser/renderer_host/input/synthetic_gesture_target_android.h"
6
7#include "content/browser/android/content_view_core_impl.h"
8#include "content/browser/renderer_host/render_widget_host_impl.h"
9#include "jni/TouchEventSynthesizer_jni.h"
10#include "third_party/WebKit/public/web/WebInputEvent.h"
11#include "ui/gfx/android/view_configuration.h"
12#include "ui/gfx/screen.h"
13
14using blink::WebTouchEvent;
15
16namespace content {
17
18SyntheticGestureTargetAndroid::SyntheticGestureTargetAndroid(
19    RenderWidgetHostImpl* host,
20    base::android::ScopedJavaLocalRef<jobject> touch_event_synthesizer)
21    : SyntheticGestureTargetBase(host),
22      touch_event_synthesizer_(touch_event_synthesizer) {
23  DCHECK(!touch_event_synthesizer_.is_null());
24}
25
26SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() {
27}
28
29bool SyntheticGestureTargetAndroid::RegisterTouchEventSynthesizer(JNIEnv* env) {
30  return RegisterNativesImpl(env);
31}
32
33void SyntheticGestureTargetAndroid::TouchSetPointer(
34    JNIEnv* env, int index, int x, int y, int id) {
35  Java_TouchEventSynthesizer_setPointer(env, touch_event_synthesizer_.obj(),
36                                      index, x, y, id);
37}
38
39void SyntheticGestureTargetAndroid::TouchInject(
40    JNIEnv* env, Action action, int pointer_count) {
41  Java_TouchEventSynthesizer_inject(env, touch_event_synthesizer_.obj(),
42                                  static_cast<int>(action), pointer_count);
43}
44
45void SyntheticGestureTargetAndroid::DispatchWebTouchEventToPlatform(
46    const blink::WebTouchEvent& web_touch, const ui::LatencyInfo&) {
47  JNIEnv* env = base::android::AttachCurrentThread();
48
49  SyntheticGestureTargetAndroid::Action action =
50      SyntheticGestureTargetAndroid::ActionInvalid;
51  switch (web_touch.type) {
52    case blink::WebInputEvent::TouchStart:
53      action = SyntheticGestureTargetAndroid::ActionStart;
54      break;
55    case blink::WebInputEvent::TouchMove:
56      action = SyntheticGestureTargetAndroid::ActionMove;
57      break;
58    case blink::WebInputEvent::TouchCancel:
59      action = SyntheticGestureTargetAndroid::ActionCancel;
60      break;
61    case blink::WebInputEvent::TouchEnd:
62      action = SyntheticGestureTargetAndroid::ActionEnd;
63      break;
64    default:
65      NOTREACHED();
66  }
67  const unsigned num_touches = web_touch.touchesLength;
68  for (unsigned i = 0; i < num_touches; ++i) {
69    const blink::WebTouchPoint* point = &web_touch.touches[i];
70    TouchSetPointer(env, i, point->position.x, point->position.y, point->id);
71  }
72
73  TouchInject(env, action, num_touches);
74}
75
76SyntheticGestureParams::GestureSourceType
77SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
78  return SyntheticGestureParams::TOUCH_INPUT;
79}
80
81bool SyntheticGestureTargetAndroid::SupportsSyntheticGestureSourceType(
82    SyntheticGestureParams::GestureSourceType gesture_source_type) const {
83  return gesture_source_type == SyntheticGestureParams::TOUCH_INPUT;
84}
85
86int SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
87  float device_scale_factor =
88      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
89  return gfx::ViewConfiguration::GetTouchSlopInPixels() / device_scale_factor;
90}
91
92}  // namespace content
93