third_party/WebKit/Source/modules/battery/BatteryDispatcher.cpp

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "modules/battery/BatteryDispatcher.h"

#include "platform/mojo/MojoHelper.h"
#include "platform/wtf/Assertions.h"
#include "public/platform/InterfaceProvider.h"
#include "public/platform/Platform.h"
#include "services/device/public/interfaces/constants.mojom-blink.h"

namespace blink {

BatteryDispatcher& BatteryDispatcher::Instance() {
  DEFINE_STATIC_LOCAL(BatteryDispatcher, battery_dispatcher,
                      (new BatteryDispatcher));
  return battery_dispatcher;
}

BatteryDispatcher::BatteryDispatcher() : has_latest_data_(false) {}

void BatteryDispatcher::QueryNextStatus() {
  monitor_->QueryNextStatus(ConvertToBaseCallback(
      WTF::Bind(&BatteryDispatcher::OnDidChange, WrapPersistent(this))));
}

void BatteryDispatcher::OnDidChange(
    device::mojom::blink::BatteryStatusPtr battery_status) {
  QueryNextStatus();

  DCHECK(battery_status);

  UpdateBatteryStatus(
      BatteryStatus(battery_status->charging, battery_status->charging_time,
                    battery_status->discharging_time, battery_status->level));
}

void BatteryDispatcher::UpdateBatteryStatus(
    const BatteryStatus& battery_status) {
  battery_status_ = battery_status;
  has_latest_data_ = true;
  NotifyControllers();
}

void BatteryDispatcher::StartListening() {
  DCHECK(!monitor_.is_bound());
  Platform::Current()->GetInterfaceProvider()->GetInterface(
      mojo::MakeRequest(&monitor_));
  QueryNextStatus();
}

void BatteryDispatcher::StopListening() {
  monitor_.reset();
  has_latest_data_ = false;
}

}  // namespace blink