src/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/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
  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::RegisterTouchEventSynthesizer(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("benchmark", "SyntheticGestureTargetAndroid::TouchSetPointer");
  36   Java_TouchEventSynthesizer_setPointer(env, touch_event_synthesizer_.obj(),
  37                                       index, x, y, id);
  38 }
  39
  40 void SyntheticGestureTargetAndroid::TouchInject(
  41     JNIEnv* env, Action action, int pointer_count, int64 time_in_ms) {
  42   TRACE_EVENT0("benchmark", "SyntheticGestureTargetAndroid::TouchInject");
  43   Java_TouchEventSynthesizer_inject(env, touch_event_synthesizer_.obj(),
  44                                     static_cast<int>(action), pointer_count,
  45                                     time_in_ms);
  46 }
  47
  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
  80 SyntheticGestureParams::GestureSourceType
  81 SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
  82   return SyntheticGestureParams::TOUCH_INPUT;
  83 }
  84
  85 bool SyntheticGestureTargetAndroid::SupportsSyntheticGestureSourceType(
  86     SyntheticGestureParams::GestureSourceType gesture_source_type) const {
  87   return gesture_source_type == SyntheticGestureParams::TOUCH_INPUT;
  88 }
  89
  90 int SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
  91   float device_scale_factor =
  92       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
  93   return gfx::ViewConfiguration::GetTouchSlopInPixels() / device_scale_factor;
  94 }
  95
  96 }  // namespace content