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| 1 // Copyright (c) 2012 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_message_filter.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/bind_helpers.h" |
| 9 #include "content/browser/battery_status/battery_status_provider_impl.h" |
| 10 #include "content/common/battery_status_messages.h" |
| 11 #include "content/public/browser/power_supply_status.h" |
| 12 #include "third_party/WebKit/Source/WebKit/chromium/public/WebBatteryStatus.h" |
| 13 |
| 14 namespace content { |
| 15 |
| 16 class BatteryStatusMessageFilter::PowerManagerObserver : |
| 17 public BatteryStatusProviderImpl::Observer { |
| 18 public: |
| 19 explicit PowerManagerObserver(BatteryStatusMessageFilter* filter) |
| 20 : filter_(filter) { |
| 21 BatteryStatusProviderImpl::GetInstance()->AddObserver(this); |
| 22 } |
| 23 |
| 24 virtual ~PowerManagerObserver() { |
| 25 BatteryStatusProviderImpl::GetInstance()->RemoveObserver(this); |
| 26 } |
| 27 |
| 28 void DestroyOnUI() { |
| 29 filter_ = NULL; |
| 30 BrowserThread::DeleteOnUIThread::Destruct(this); |
| 31 } |
| 32 |
| 33 private: |
| 34 virtual void PowerChanged( |
| 35 const PowerSupplyStatus& power_status) OVERRIDE { |
| 36 if (filter_) |
| 37 filter_->SendUpdates(power_status); |
| 38 } |
| 39 |
| 40 BatteryStatusMessageFilter* filter_; |
| 41 |
| 42 DISALLOW_COPY_AND_ASSIGN(PowerManagerObserver); |
| 43 }; |
| 44 |
| 45 BatteryStatusMessageFilter::BatteryStatusMessageFilter() { |
| 46 } |
| 47 |
| 48 void BatteryStatusMessageFilter::SendUpdates( |
| 49 const PowerSupplyStatus& power_status) { |
| 50 WebKit::WebBatteryStatus web_status; |
| 51 web_status.charging = power_status.line_power_on; |
| 52 web_status.chargingTime = power_status.battery_seconds_to_full; |
| 53 web_status.dischargingTime = power_status.battery_seconds_to_empty; |
| 54 web_status.level = power_status.battery_percentage / 100.; |
| 55 |
| 56 Send(new BatteryStatusMsg_Updated(web_status)); |
| 57 } |
| 58 |
| 59 BatteryStatusMessageFilter::~BatteryStatusMessageFilter() { |
| 60 if (observer_.get()) { |
| 61 // This destructor is in the IO thread. But we need to destroy the observer |
| 62 // in the UI thread. |
| 63 observer_.release()->DestroyOnUI(); |
| 64 } |
| 65 } |
| 66 |
| 67 void BatteryStatusMessageFilter::OnStartUpdating() { |
| 68 if (!observer_.get()) |
| 69 observer_.reset(new PowerManagerObserver(this)); |
| 70 } |
| 71 |
| 72 void BatteryStatusMessageFilter::OnStopUpdating() { |
| 73 observer_.reset(); |
| 74 } |
| 75 |
| 76 void BatteryStatusMessageFilter::OverrideThreadForMessage( |
| 77 const IPC::Message& message, |
| 78 BrowserThread::ID* thread) { |
| 79 if (IPC_MESSAGE_CLASS(message) == BatteryStatusMsgStart) |
| 80 *thread = BrowserThread::UI; |
| 81 } |
| 82 |
| 83 bool BatteryStatusMessageFilter::OnMessageReceived(const IPC::Message& message, |
| 84 bool* message_was_ok) { |
| 85 bool handled = true; |
| 86 IPC_BEGIN_MESSAGE_MAP_EX(BatteryStatusMessageFilter, message, *message_was_ok) |
| 87 IPC_MESSAGE_HANDLER(BatteryStatusHostMsg_StartUpdating, OnStartUpdating) |
| 88 IPC_MESSAGE_HANDLER(BatteryStatusHostMsg_StopUpdating, OnStopUpdating) |
| 89 IPC_MESSAGE_UNHANDLED(handled = false) |
| 90 IPC_END_MESSAGE_MAP_EX() |
| 91 return handled; |
| 92 } |
| 93 |
| 94 } // namespace content |
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