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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   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
36   Java_TouchEventSynthesizer_setPointer(env, touch_event_synthesizer_.obj(),
37                                       index, x, y, id);
38 }
39 
TouchInject(JNIEnv * env,Action action,int pointer_count,int64 time_in_ms)40 void SyntheticGestureTargetAndroid::TouchInject(
41     JNIEnv* env, Action action, int pointer_count, int64 time_in_ms) {
42   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchInject");
43   Java_TouchEventSynthesizer_inject(env, touch_event_synthesizer_.obj(),
44                                     static_cast<int>(action), pointer_count,
45                                     time_in_ms);
46 }
47 
DispatchWebTouchEventToPlatform(const blink::WebTouchEvent & web_touch,const ui::LatencyInfo &)48 void SyntheticGestureTargetAndroid::DispatchWebTouchEventToPlatform(
49     const blink::WebTouchEvent& web_touch, const ui::LatencyInfo&) {
50   JNIEnv* env = base::android::AttachCurrentThread();
51 
52   SyntheticGestureTargetAndroid::Action action =
53       SyntheticGestureTargetAndroid::ActionInvalid;
54   switch (web_touch.type) {
55     case blink::WebInputEvent::TouchStart:
56       action = SyntheticGestureTargetAndroid::ActionStart;
57       break;
58     case blink::WebInputEvent::TouchMove:
59       action = SyntheticGestureTargetAndroid::ActionMove;
60       break;
61     case blink::WebInputEvent::TouchCancel:
62       action = SyntheticGestureTargetAndroid::ActionCancel;
63       break;
64     case blink::WebInputEvent::TouchEnd:
65       action = SyntheticGestureTargetAndroid::ActionEnd;
66       break;
67     default:
68       NOTREACHED();
69   }
70   const unsigned num_touches = web_touch.touchesLength;
71   for (unsigned i = 0; i < num_touches; ++i) {
72     const blink::WebTouchPoint* point = &web_touch.touches[i];
73     TouchSetPointer(env, i, point->position.x, point->position.y, point->id);
74   }
75 
76   TouchInject(env, action, num_touches,
77               static_cast<int64>(web_touch.timeStampSeconds * 1000.0));
78 }
79 
DispatchWebMouseWheelEventToPlatform(const blink::WebMouseWheelEvent & web_wheel,const ui::LatencyInfo &)80 void SyntheticGestureTargetAndroid::DispatchWebMouseWheelEventToPlatform(
81     const blink::WebMouseWheelEvent& web_wheel, const ui::LatencyInfo&) {
82   CHECK(false);
83 }
84 
DispatchWebMouseEventToPlatform(const blink::WebMouseEvent & web_mouse,const ui::LatencyInfo &)85 void SyntheticGestureTargetAndroid::DispatchWebMouseEventToPlatform(
86     const blink::WebMouseEvent& web_mouse, const ui::LatencyInfo&) {
87   CHECK(false);
88 }
89 
90 SyntheticGestureParams::GestureSourceType
GetDefaultSyntheticGestureSourceType() const91 SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
92   return SyntheticGestureParams::TOUCH_INPUT;
93 }
94 
GetTouchSlopInDips() const95 float SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
96   float device_scale_factor =
97       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
98   return gfx::ViewConfiguration::GetTouchSlopInPixels() / device_scale_factor;
99 }
100 
GetMinScalingSpanInDips() const101 float SyntheticGestureTargetAndroid::GetMinScalingSpanInDips() const {
102   float device_scale_factor =
103       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
104   return
105       gfx::ViewConfiguration::GetMinScalingSpanInPixels() / device_scale_factor;
106 }
107 
108 }  // namespace content
109