content/browser/renderer_host/input/synthetic_gesture_target_android.cc

   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/MotionEventSynthesizer_jni.h"
  10 #include "third_party/WebKit/public/web/WebInputEvent.h"
  11 #include "ui/gfx/android/view_configuration.h"
  12
  13 using blink::WebTouchEvent;
  14
  15 namespace content {
  16
  17 SyntheticGestureTargetAndroid::SyntheticGestureTargetAndroid(
  18     RenderWidgetHostImpl* host,
  19     base::android::ScopedJavaLocalRef<jobject> touch_event_synthesizer)
  20     : SyntheticGestureTargetBase(host),
  21       touch_event_synthesizer_(touch_event_synthesizer) {
  22   DCHECK(!touch_event_synthesizer_.is_null());
  23 }
  24
  25 SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() {
  26 }
  27
  28 bool SyntheticGestureTargetAndroid::RegisterMotionEventSynthesizer(
  29     JNIEnv* env) {
  30   return RegisterNativesImpl(env);
  31 }
  32
  33 void SyntheticGestureTargetAndroid::TouchSetPointer(
  34     JNIEnv* env, int index, int x, int y, int id) {
  35   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
  36   Java_MotionEventSynthesizer_setPointer(env, touch_event_synthesizer_.obj(),
  37                                       index, x, y, id);
  38 }
  39
  40 void SyntheticGestureTargetAndroid::TouchSetScrollDeltas(
  41     JNIEnv* env, int x, int y, int dx, int dy) {
  42   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
  43   Java_MotionEventSynthesizer_setScrollDeltas(
  44       env, touch_event_synthesizer_.obj(), x, y, dx, dy);
  45 }
  46
  47 void SyntheticGestureTargetAndroid::TouchInject(
  48     JNIEnv* env, Action action, int pointer_count, int64 time_in_ms) {
  49   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchInject");
  50   Java_MotionEventSynthesizer_inject(env, touch_event_synthesizer_.obj(),
  51                                     static_cast<int>(action), pointer_count,
  52                                     time_in_ms);
  53 }
  54
  55 void SyntheticGestureTargetAndroid::DispatchWebTouchEventToPlatform(
  56     const blink::WebTouchEvent& web_touch, const ui::LatencyInfo&) {
  57   JNIEnv* env = base::android::AttachCurrentThread();
  58
  59   SyntheticGestureTargetAndroid::Action action =
  60       SyntheticGestureTargetAndroid::ActionInvalid;
  61   switch (web_touch.type) {
  62     case blink::WebInputEvent::TouchStart:
  63       action = SyntheticGestureTargetAndroid::ActionStart;
  64       break;
  65     case blink::WebInputEvent::TouchMove:
  66       action = SyntheticGestureTargetAndroid::ActionMove;
  67       break;
  68     case blink::WebInputEvent::TouchCancel:
  69       action = SyntheticGestureTargetAndroid::ActionCancel;
  70       break;
  71     case blink::WebInputEvent::TouchEnd:
  72       action = SyntheticGestureTargetAndroid::ActionEnd;
  73       break;
  74     default:
  75       NOTREACHED();
  76   }
  77   const unsigned num_touches = web_touch.touchesLength;
  78   for (unsigned i = 0; i < num_touches; ++i) {
  79     const blink::WebTouchPoint* point = &web_touch.touches[i];
  80     TouchSetPointer(env, i, point->position.x, point->position.y, point->id);
  81   }
  82
  83   TouchInject(env, action, num_touches,
  84               static_cast<int64>(web_touch.timeStampSeconds * 1000.0));
  85 }
  86
  87 void SyntheticGestureTargetAndroid::DispatchWebMouseWheelEventToPlatform(
  88     const blink::WebMouseWheelEvent& web_wheel, const ui::LatencyInfo&) {
  89   JNIEnv* env = base::android::AttachCurrentThread();
  90   TouchSetScrollDeltas(env, web_wheel.x, web_wheel.y, web_wheel.deltaX,
  91                        web_wheel.deltaY);
  92   Java_MotionEventSynthesizer_inject(
  93       env, touch_event_synthesizer_.obj(),
  94       static_cast<int>(SyntheticGestureTargetAndroid::ActionScroll),
  95       1, static_cast<int64>(web_wheel.timeStampSeconds * 1000.0));
  96 }
  97
  98 void SyntheticGestureTargetAndroid::DispatchWebMouseEventToPlatform(
  99     const blink::WebMouseEvent& web_mouse, const ui::LatencyInfo&) {
 100   CHECK(false);
 101 }
 102
 103 SyntheticGestureParams::GestureSourceType
 104 SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
 105   return SyntheticGestureParams::TOUCH_INPUT;
 106 }
 107
 108 float SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
 109   // TODO(jdduke): Have all targets use the same ui::GestureConfiguration
 110   // codepath.
 111   return gfx::ViewConfiguration::GetTouchSlopInDips();
 112 }
 113
 114 float SyntheticGestureTargetAndroid::GetMinScalingSpanInDips() const {
 115   // TODO(jdduke): Have all targets use the same ui::GestureConfiguration
 116   // codepath.
 117   return gfx::ViewConfiguration::GetMinScalingSpanInDips();
 118 }
 119
 120 }  // namespace content