content/browser/vibration/vibration_provider_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/vibration/vibration_provider_android.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/safe_numerics.h"
  10 #include "content/browser/vibration/vibration_message_filter.h"
  11 #include "content/common/view_messages.h"
  12 #include "jni/VibrationProvider_jni.h"
  13 #include "third_party/WebKit/public/platform/WebVibration.h"
  14
  15 using base::android::AttachCurrentThread;
  16
  17 namespace content {
  18
  19 VibrationProviderAndroid::VibrationProviderAndroid() {
  20 }
  21
  22 VibrationProviderAndroid::~VibrationProviderAndroid() {
  23 }
  24
  25 // static
  26 bool VibrationProviderAndroid::Register(JNIEnv* env) {
  27   return RegisterNativesImpl(env);
  28 }
  29
  30 void VibrationProviderAndroid::Vibrate(int64 milliseconds) {
  31   if (j_vibration_provider_.is_null()) {
  32     j_vibration_provider_.Reset(
  33         Java_VibrationProvider_create(
  34             AttachCurrentThread(),
  35             base::android::GetApplicationContext()));
  36   }
  37   Java_VibrationProvider_vibrate(AttachCurrentThread(),
  38                                 j_vibration_provider_.obj(),
  39                                 milliseconds);
  40 }
  41
  42 void VibrationProviderAndroid::CancelVibration() {
  43   // If somehow a cancel message is received before this object was
  44   // instantiated, it means there is no current vibration anyway. Just return.
  45   if (j_vibration_provider_.is_null())
  46     return;
  47
  48   Java_VibrationProvider_cancelVibration(AttachCurrentThread(),
  49                                         j_vibration_provider_.obj());
  50 }
  51
  52 // static
  53 VibrationProvider* VibrationMessageFilter::CreateProvider() {
  54   return new VibrationProviderAndroid();
  55 }
  56
  57 }  // namespace content