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      1 // Copyright 2014 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/battery_status/battery_status_manager_android.h"
      6 
      7 #include "base/android/jni_android.h"
      8 #include "base/android/scoped_java_ref.h"
      9 #include "base/metrics/histogram.h"
     10 #include "jni/BatteryStatusManager_jni.h"
     11 
     12 using base::android::AttachCurrentThread;
     13 
     14 namespace content {
     15 
     16 BatteryStatusManagerAndroid::BatteryStatusManagerAndroid(
     17     const BatteryStatusService::BatteryUpdateCallback& callback)
     18     : callback_(callback) {
     19   j_manager_.Reset(
     20       Java_BatteryStatusManager_getInstance(
     21           AttachCurrentThread(), base::android::GetApplicationContext()));
     22 }
     23 
     24 BatteryStatusManagerAndroid::~BatteryStatusManagerAndroid() {
     25 }
     26 
     27 // static
     28 bool BatteryStatusManagerAndroid::Register(JNIEnv* env) {
     29   return RegisterNativesImpl(env);
     30 }
     31 
     32 void BatteryStatusManagerAndroid::GotBatteryStatus(JNIEnv*,
     33                                                    jobject,
     34                                                    jboolean charging,
     35                                                    jdouble charging_time,
     36                                                    jdouble discharging_time,
     37                                                    jdouble level) {
     38   blink::WebBatteryStatus status;
     39   status.charging = charging;
     40   status.chargingTime = charging_time;
     41   status.dischargingTime = discharging_time;
     42   status.level = level;
     43   callback_.Run(status);
     44 }
     45 
     46 bool BatteryStatusManagerAndroid::StartListeningBatteryChange() {
     47   bool result = Java_BatteryStatusManager_start(AttachCurrentThread(),
     48       j_manager_.obj(), reinterpret_cast<intptr_t>(this));
     49   UMA_HISTOGRAM_BOOLEAN("BatteryStatus.StartAndroid", result);
     50   return result;
     51 }
     52 
     53 void BatteryStatusManagerAndroid::StopListeningBatteryChange() {
     54   Java_BatteryStatusManager_stop(
     55       AttachCurrentThread(), j_manager_.obj());
     56 }
     57 
     58 // static
     59 scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create(
     60     const BatteryStatusService::BatteryUpdateCallback& callback) {
     61   return scoped_ptr<BatteryStatusManager>(
     62       new BatteryStatusManagerAndroid(callback));
     63 }
     64 
     65 }  // namespace content
     66