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.
5 #include "base/power_monitor/power_monitor.h"
6 #include "base/power_monitor/power_monitor_device_source.h"
7 #include "base/power_monitor/power_monitor_source.h"
8 #include "base/profiler/scoped_tracker.h"
9 #include "base/win/wrapped_window_proc.h"
13 void ProcessPowerEventHelper(PowerMonitorSource::PowerEvent event
) {
14 PowerMonitorSource::ProcessPowerEvent(event
);
19 const wchar_t kWindowClassName
[] = L
"Base_PowerMessageWindow";
21 void ProcessWmPowerBroadcastMessage(WPARAM event_id
) {
22 PowerMonitorSource::PowerEvent power_event
;
24 case PBT_APMPOWERSTATUSCHANGE
: // The power status changed.
25 power_event
= PowerMonitorSource::POWER_STATE_EVENT
;
27 case PBT_APMRESUMEAUTOMATIC
: // Resume from suspend.
28 //case PBT_APMRESUMESUSPEND: // User-initiated resume from suspend.
29 // We don't notify for this latter event
30 // because if it occurs it is always sent as a
31 // second event after PBT_APMRESUMEAUTOMATIC.
32 power_event
= PowerMonitorSource::RESUME_EVENT
;
34 case PBT_APMSUSPEND
: // System has been suspended.
35 power_event
= PowerMonitorSource::SUSPEND_EVENT
;
40 // Other Power Events:
41 // PBT_APMBATTERYLOW - removed in Vista.
42 // PBT_APMOEMEVENT - removed in Vista.
43 // PBT_APMQUERYSUSPEND - removed in Vista.
44 // PBT_APMQUERYSUSPENDFAILED - removed in Vista.
45 // PBT_APMRESUMECRITICAL - removed in Vista.
46 // PBT_POWERSETTINGCHANGE - user changed the power settings.
49 ProcessPowerEventHelper(power_event
);
54 // Function to query the system to see if it is currently running on
55 // battery power. Returns true if running on battery.
56 bool PowerMonitorDeviceSource::IsOnBatteryPowerImpl() {
57 SYSTEM_POWER_STATUS status
;
58 if (!GetSystemPowerStatus(&status
)) {
59 DPLOG(ERROR
) << "GetSystemPowerStatus failed";
62 return (status
.ACLineStatus
== 0);
65 PowerMonitorDeviceSource::PowerMessageWindow::PowerMessageWindow()
66 : instance_(NULL
), message_hwnd_(NULL
) {
67 if (!MessageLoopForUI::IsCurrent()) {
68 // Creating this window in (e.g.) a renderer inhibits shutdown on Windows.
69 // See http://crbug.com/230122. TODO(vandebo): http://crbug.com/236031
71 << "Cannot create windows on non-UI thread, power monitor disabled!";
74 WNDCLASSEX window_class
;
75 base::win::InitializeWindowClass(
77 &base::win::WrappedWindowProc
<
78 PowerMonitorDeviceSource::PowerMessageWindow::WndProcThunk
>,
79 0, 0, 0, NULL
, NULL
, NULL
, NULL
, NULL
,
81 instance_
= window_class
.hInstance
;
82 ATOM clazz
= RegisterClassEx(&window_class
);
85 message_hwnd_
= CreateWindowEx(WS_EX_NOACTIVATE
, kWindowClassName
,
86 NULL
, WS_POPUP
, 0, 0, 0, 0, NULL
, NULL
, instance_
, NULL
);
89 PowerMonitorDeviceSource::PowerMessageWindow::~PowerMessageWindow() {
91 DestroyWindow(message_hwnd_
);
92 UnregisterClass(kWindowClassName
, instance_
);
97 LRESULT CALLBACK
PowerMonitorDeviceSource::PowerMessageWindow::WndProcThunk(
103 case WM_POWERBROADCAST
:
104 ProcessWmPowerBroadcastMessage(wparam
);
107 return ::DefWindowProc(hwnd
, message
, wparam
, lparam
);