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
14 using blink::WebTouchEvent;
15
16 namespace content {
17
SyntheticGestureTargetAndroid(RenderWidgetHostImpl * host,base::android::ScopedJavaLocalRef<jobject> touch_event_synthesizer)18 SyntheticGestureTargetAndroid::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
~SyntheticGestureTargetAndroid()26 SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() {
27 }
28
RegisterTouchEventSynthesizer(JNIEnv * env)29 bool SyntheticGestureTargetAndroid::RegisterTouchEventSynthesizer(JNIEnv* env) {
30 return RegisterNativesImpl(env);
31 }
32
TouchSetPointer(JNIEnv * env,int index,int x,int y,int id)33 void 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
TouchInject(JNIEnv * env,Action action,int pointer_count)39 void 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
DispatchWebTouchEventToPlatform(const blink::WebTouchEvent & web_touch,const ui::LatencyInfo &)45 void 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
76 SyntheticGestureParams::GestureSourceType
GetDefaultSyntheticGestureSourceType() const77 SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
78 return SyntheticGestureParams::TOUCH_INPUT;
79 }
80
SupportsSyntheticGestureSourceType(SyntheticGestureParams::GestureSourceType gesture_source_type) const81 bool SyntheticGestureTargetAndroid::SupportsSyntheticGestureSourceType(
82 SyntheticGestureParams::GestureSourceType gesture_source_type) const {
83 return gesture_source_type == SyntheticGestureParams::TOUCH_INPUT;
84 }
85
GetTouchSlopInDips() const86 int 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