Index: content/browser/battery_status/battery_status_manager_win.cc |
=================================================================== |
--- content/browser/battery_status/battery_status_manager_win.cc (revision 290351) |
+++ content/browser/battery_status/battery_status_manager_win.cc (working copy) |
@@ -1,206 +0,0 @@ |
-// 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 "content/browser/battery_status/battery_status_manager_win.h" |
- |
-#include "base/memory/ref_counted.h" |
-#include "base/strings/string16.h" |
-#include "base/win/message_window.h" |
-#include "base/win/windows_version.h" |
-#include "content/browser/battery_status/battery_status_manager.h" |
-#include "content/public/browser/browser_thread.h" |
- |
-namespace content { |
- |
-namespace { |
- |
-typedef BatteryStatusService::BatteryUpdateCallback BatteryCallback; |
- |
-const wchar_t kWindowClassName[] = L"BatteryStatusMessageWindow"; |
- |
-// Message-only window for handling battery changes on Windows. |
-class BatteryStatusObserver |
- : public base::RefCountedThreadSafe<BatteryStatusObserver> { |
- public: |
- explicit BatteryStatusObserver(const BatteryCallback& callback) |
- : power_handle_(NULL), |
- battery_change_handle_(NULL), |
- callback_(callback) { |
- } |
- |
- virtual ~BatteryStatusObserver() { DCHECK(!window_); } |
- |
- void Start() { |
- // Need to start on the UI thread to receive battery status notifications. |
- BrowserThread::PostTask( |
- BrowserThread::UI, |
- FROM_HERE, |
- base::Bind(&BatteryStatusObserver::StartOnUI, this)); |
- } |
- |
- void Stop() { |
- BrowserThread::PostTask( |
- BrowserThread::UI, |
- FROM_HERE, |
- base::Bind(&BatteryStatusObserver::StopOnUI, this)); |
- } |
- |
- private: |
- void StartOnUI() { |
- DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
- if (window_) |
- return; |
- |
- if (CreateMessageWindow()) { |
- BatteryChanged(); |
- // RegisterPowerSettingNotification function work from Windows Vista |
- // onwards. However even without them we will receive notifications, |
- // e.g. when a power source is connected. |
- // TODO(timvolodine) : consider polling for battery changes on windows |
- // versions prior to Vista, see crbug.com/402466. |
- power_handle_ = |
- RegisterNotification(&GUID_ACDC_POWER_SOURCE); |
- battery_change_handle_ = |
- RegisterNotification(&GUID_BATTERY_PERCENTAGE_REMAINING); |
- } else { |
- // Could not create a message window, execute callback with the default |
- // values. |
- callback_.Run(blink::WebBatteryStatus()); |
- } |
- } |
- |
- void StopOnUI() { |
- DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
- if (!window_) |
- return; |
- |
- if (power_handle_) |
- UnregisterNotification(power_handle_); |
- if (battery_change_handle_) |
- UnregisterNotification(battery_change_handle_); |
- window_.reset(); |
- } |
- |
- void BatteryChanged() { |
- SYSTEM_POWER_STATUS win_status; |
- if (GetSystemPowerStatus(&win_status)) |
- callback_.Run(ComputeWebBatteryStatus(win_status)); |
- else |
- callback_.Run(blink::WebBatteryStatus()); |
- } |
- |
- bool HandleMessage(UINT message, |
- WPARAM wparam, |
- LPARAM lparam, |
- LRESULT* result) { |
- switch(message) { |
- case WM_POWERBROADCAST: |
- if (wparam == PBT_APMPOWERSTATUSCHANGE || |
- wparam == PBT_POWERSETTINGCHANGE) { |
- BatteryChanged(); |
- } |
- *result = NULL; |
- return true; |
- default: |
- return false; |
- } |
- } |
- |
- HPOWERNOTIFY RegisterNotification(LPCGUID power_setting) { |
- if (base::win::GetVersion() < base::win::VERSION_VISTA) |
- return NULL; |
- |
- return RegisterPowerSettingNotification(window_->hwnd(), power_setting, |
- DEVICE_NOTIFY_WINDOW_HANDLE); |
- } |
- |
- BOOL UnregisterNotification(HPOWERNOTIFY handle) { |
- if (base::win::GetVersion() < base::win::VERSION_VISTA) |
- return FALSE; |
- |
- return UnregisterPowerSettingNotification(handle); |
- } |
- |
- bool CreateMessageWindow() { |
- // TODO(timvolodine): consider reusing the message window of PowerMonitor. |
- window_.reset(new base::win::MessageWindow()); |
- if (!window_->CreateNamed(base::Bind(&BatteryStatusObserver::HandleMessage, |
- base::Unretained(this)), |
- base::string16(kWindowClassName))) { |
- LOG(ERROR) << "Failed to create message window: " << kWindowClassName; |
- window_.reset(); |
- return false; |
- } |
- return true; |
- } |
- |
- HPOWERNOTIFY power_handle_; |
- HPOWERNOTIFY battery_change_handle_; |
- BatteryCallback callback_; |
- scoped_ptr<base::win::MessageWindow> window_; |
- |
- DISALLOW_COPY_AND_ASSIGN(BatteryStatusObserver); |
-}; |
- |
-class BatteryStatusManagerWin : public BatteryStatusManager { |
- public: |
- explicit BatteryStatusManagerWin(const BatteryCallback& callback) |
- : battery_observer_(new BatteryStatusObserver(callback)) {} |
- virtual ~BatteryStatusManagerWin() { battery_observer_->Stop(); } |
- |
- public: |
- // BatteryStatusManager: |
- virtual bool StartListeningBatteryChange() OVERRIDE { |
- DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
- battery_observer_->Start(); |
- return true; |
- } |
- |
- virtual void StopListeningBatteryChange() OVERRIDE { |
- DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
- battery_observer_->Stop(); |
- } |
- |
- private: |
- scoped_refptr<BatteryStatusObserver> battery_observer_; |
- |
- DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerWin); |
-}; |
- |
-} // namespace |
- |
-blink::WebBatteryStatus ComputeWebBatteryStatus( |
- const SYSTEM_POWER_STATUS& win_status) { |
- blink::WebBatteryStatus status; |
- status.charging = win_status.ACLineStatus != WIN_AC_LINE_STATUS_OFFLINE; |
- |
- // Set level if available. Otherwise keep the default value which is 1. |
- if (win_status.BatteryLifePercent != 255) { |
- // Convert percentage to a value between 0 and 1 with 2 significant digits. |
- status.level = static_cast<double>(win_status.BatteryLifePercent) / 100.; |
- } |
- |
- if (!status.charging) { |
- // Set dischargingTime if available otherwise keep the default value, |
- // which is +Infinity. |
- if (win_status.BatteryLifeTime != (DWORD)-1) |
- status.dischargingTime = win_status.BatteryLifeTime; |
- status.chargingTime = std::numeric_limits<double>::infinity(); |
- } else { |
- // Set chargingTime to +Infinity if not fully charged, otherwise leave the |
- // default value, which is 0. |
- if (status.level < 1) |
- status.chargingTime = std::numeric_limits<double>::infinity(); |
- } |
- return status; |
-} |
- |
-// static |
-scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create( |
- const BatteryStatusService::BatteryUpdateCallback& callback) { |
- return scoped_ptr<BatteryStatusManager>( |
- new BatteryStatusManagerWin(callback)); |
-} |
- |
-} // namespace content |