// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_
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#define BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_
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#include "base/base_export.h"
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#include "base/macros.h"
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#include "base/power_monitor/power_monitor_source.h"
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#include "base/power_monitor/power_observer.h"
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#include "build/build_config.h"
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#if defined(OS_WIN)
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#include <windows.h>
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#endif // !OS_WIN
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#if defined(OS_IOS)
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#include <objc/runtime.h>
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#endif // OS_IOS
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namespace base {
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// A class used to monitor the power state change and notify the observers about
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// the change event.
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class BASE_EXPORT PowerMonitorDeviceSource : public PowerMonitorSource {
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public:
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PowerMonitorDeviceSource();
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~PowerMonitorDeviceSource() override;
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void Shutdown() override;
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#if defined(OS_MACOSX)
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// Allocate system resources needed by the PowerMonitor class.
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//
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// This function must be called before instantiating an instance of the class
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// and before the Sandbox is initialized.
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#if !defined(OS_IOS)
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static void AllocateSystemIOPorts();
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#else
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static void AllocateSystemIOPorts() {}
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#endif // OS_IOS
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#endif // OS_MACOSX
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#if defined(OS_CHROMEOS)
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// On Chrome OS, Chrome receives power-related events from powerd, the system
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// power daemon, via D-Bus signals received on the UI thread. base can't
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// directly depend on that code, so this class instead exposes static methods
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// so that events can be passed in.
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static void SetPowerSource(bool on_battery);
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static void HandleSystemSuspending();
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static void HandleSystemResumed();
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#endif
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private:
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#if defined(OS_WIN)
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// Represents a message-only window for power message handling on Windows.
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// Only allow PowerMonitor to create it.
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class PowerMessageWindow {
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public:
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PowerMessageWindow();
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~PowerMessageWindow();
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private:
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static LRESULT CALLBACK WndProcThunk(HWND hwnd,
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UINT message,
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WPARAM wparam,
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LPARAM lparam);
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// Instance of the module containing the window procedure.
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HMODULE instance_;
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// A hidden message-only window.
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HWND message_hwnd_;
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};
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#endif // OS_WIN
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#if defined(OS_MACOSX)
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void PlatformInit();
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void PlatformDestroy();
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#endif
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// Platform-specific method to check whether the system is currently
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// running on battery power. Returns true if running on batteries,
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// false otherwise.
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bool IsOnBatteryPowerImpl() override;
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#if defined(OS_IOS)
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// Holds pointers to system event notification observers.
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std::vector<id> notification_observers_;
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#endif
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#if defined(OS_WIN)
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PowerMessageWindow power_message_window_;
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#endif
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DISALLOW_COPY_AND_ASSIGN(PowerMonitorDeviceSource);
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};
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} // namespace base
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#endif // BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_
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