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 #include "ui/gfx/screen.h"
  13
  14 using blink::WebTouchEvent;
  15
  16 namespace content {
  17
  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
  26 SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() {
  27 }
  28
  29 bool SyntheticGestureTargetAndroid::RegisterMotionEventSynthesizer(
  30     JNIEnv* env) {
  31   return RegisterNativesImpl(env);
  32 }
  33
  34 void SyntheticGestureTargetAndroid::TouchSetPointer(
  35     JNIEnv* env, int index, int x, int y, int id) {
  36   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
  37   Java_MotionEventSynthesizer_setPointer(env, touch_event_synthesizer_.obj(),
  38                                       index, x, y, id);
  39 }
  40
  41 void SyntheticGestureTargetAndroid::TouchSetScrollDeltas(
  42     JNIEnv* env, int x, int y, int dx, int dy) {
  43   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
  44   Java_MotionEventSynthesizer_setScrollDeltas(
  45       env, touch_event_synthesizer_.obj(), x, y, dx, dy);
  46 }
  47
  48 void SyntheticGestureTargetAndroid::TouchInject(
  49     JNIEnv* env, Action action, int pointer_count, int64 time_in_ms) {
  50   TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchInject");
  51   Java_MotionEventSynthesizer_inject(env, touch_event_synthesizer_.obj(),
  52                                     static_cast<int>(action), pointer_count,
  53                                     time_in_ms);
  54 }
  55
  56 void SyntheticGestureTargetAndroid::DispatchWebTouchEventToPlatform(
  57     const blink::WebTouchEvent& web_touch, const ui::LatencyInfo&) {
  58   JNIEnv* env = base::android::AttachCurrentThread();
  59
  60   SyntheticGestureTargetAndroid::Action action =
  61       SyntheticGestureTargetAndroid::ActionInvalid;
  62   switch (web_touch.type) {
  63     case blink::WebInputEvent::TouchStart:
  64       action = SyntheticGestureTargetAndroid::ActionStart;
  65       break;
  66     case blink::WebInputEvent::TouchMove:
  67       action = SyntheticGestureTargetAndroid::ActionMove;
  68       break;
  69     case blink::WebInputEvent::TouchCancel:
  70       action = SyntheticGestureTargetAndroid::ActionCancel;
  71       break;
  72     case blink::WebInputEvent::TouchEnd:
  73       action = SyntheticGestureTargetAndroid::ActionEnd;
  74       break;
  75     default:
  76       NOTREACHED();
  77   }
  78   const unsigned num_touches = web_touch.touchesLength;
  79   for (unsigned i = 0; i < num_touches; ++i) {
  80     const blink::WebTouchPoint* point = &web_touch.touches[i];
  81     TouchSetPointer(env, i, point->position.x, point->position.y, point->id);
  82   }
  83
  84   TouchInject(env, action, num_touches,
  85               static_cast<int64>(web_touch.timeStampSeconds * 1000.0));
  86 }
  87
  88 void SyntheticGestureTargetAndroid::DispatchWebMouseWheelEventToPlatform(
  89     const blink::WebMouseWheelEvent& web_wheel, const ui::LatencyInfo&) {
  90   JNIEnv* env = base::android::AttachCurrentThread();
  91   TouchSetScrollDeltas(env, web_wheel.x, web_wheel.y, web_wheel.deltaX,
  92                        web_wheel.deltaY);
  93   Java_MotionEventSynthesizer_inject(
  94       env, touch_event_synthesizer_.obj(),
  95       static_cast<int>(SyntheticGestureTargetAndroid::ActionScroll),
  96       1, static_cast<int64>(web_wheel.timeStampSeconds * 1000.0));
  97 }
  98
  99 void SyntheticGestureTargetAndroid::DispatchWebMouseEventToPlatform(
 100     const blink::WebMouseEvent& web_mouse, const ui::LatencyInfo&) {
 101   CHECK(false);
 102 }
 103
 104 SyntheticGestureParams::GestureSourceType
 105 SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
 106   return SyntheticGestureParams::TOUCH_INPUT;
 107 }
 108
 109 float SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
 110   float device_scale_factor =
 111       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
 112   return gfx::ViewConfiguration::GetTouchSlopInPixels() / device_scale_factor;
 113 }
 114
 115 float SyntheticGestureTargetAndroid::GetMinScalingSpanInDips() const {
 116   float device_scale_factor =
 117       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
 118   return
 119       gfx::ViewConfiguration::GetMinScalingSpanInPixels() / device_scale_factor;
 120 }
 121
 122 }  // namespace content