src/content/browser/renderer_host/generic_touch_gesture_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/generic_touch_gesture_android.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "content/browser/renderer_host/render_widget_host_impl.h"
   9 #include "jni/GenericTouchGesture_jni.h"
  10
  11 namespace {
  12 bool g_jni_initialized = false;
  13
  14 void RegisterNativesIfNeeded(JNIEnv* env) {
  15   if (!g_jni_initialized) {
  16     content::RegisterNativesImpl(env);
  17     g_jni_initialized = true;
  18   }
  19 }
  20 }  // namespace
  21
  22 namespace content {
  23
  24 GenericTouchGestureAndroid::GenericTouchGestureAndroid(
  25     RenderWidgetHost* rwh,
  26     base::android::ScopedJavaLocalRef<jobject> java_touch_gesture)
  27     : has_started_(false),
  28       has_finished_(false),
  29       rwh_(rwh),
  30       java_touch_gesture_(java_touch_gesture) {
  31   JNIEnv* env = base::android::AttachCurrentThread();
  32   RegisterNativesIfNeeded(env);
  33 }
  34
  35 GenericTouchGestureAndroid::~GenericTouchGestureAndroid() {
  36 }
  37
  38 bool GenericTouchGestureAndroid::ForwardInputEvents(
  39     base::TimeTicks now, RenderWidgetHost* host) {
  40   if (!has_started_) {
  41     has_started_ = true;
  42     JNIEnv* env = base::android::AttachCurrentThread();
  43     Java_GenericTouchGesture_start(
  44         env, java_touch_gesture_.obj(), reinterpret_cast<intptr_t>(this));
  45   }
  46
  47   return !has_finished_;
  48 }
  49
  50 float GenericTouchGestureAndroid::GetDelta(
  51     JNIEnv* env, jobject obj, float scale) {
  52   return synthetic_gesture_calculator_.GetDelta(
  53       base::TimeTicks::Now(),
  54       RenderWidgetHostImpl::From(rwh_)->GetSyntheticGestureMessageInterval()) *
  55       scale;
  56 }
  57
  58 void GenericTouchGestureAndroid::SetHasFinished(JNIEnv* env, jobject obj) {
  59   has_finished_ = true;
  60 }
  61
  62 }  // namespace content