Source/WebCore/platform/cocoa/SystemBattery.mm

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#import "config.h"
#import "SystemBattery.h"

#import <pal/spi/cocoa/IOPSLibSPI.h>

namespace WebCore {

static Optional<bool> hasBattery;

void setSystemHasBattery(bool battery)
{
    hasBattery = battery;
}

bool systemHasBattery()
{
    if (hasBattery.hasValue())
        return *hasBattery;

    RetainPtr<CFTypeRef> powerSourcesInfo = adoptCF(IOPSCopyPowerSourcesInfo());
    if (!powerSourcesInfo)
        return false;
    RetainPtr<CFArrayRef> powerSourcesList = adoptCF(IOPSCopyPowerSourcesList(powerSourcesInfo.get()));
    if (!powerSourcesList)
        return false;
    for (CFIndex i = 0, count = CFArrayGetCount(powerSourcesList.get()); i < count; ++i) {
        CFDictionaryRef description = IOPSGetPowerSourceDescription(powerSourcesInfo.get(), CFArrayGetValueAtIndex(powerSourcesList.get(), i));
        CFTypeRef value = CFDictionaryGetValue(description, CFSTR(kIOPSTypeKey));
        if (!value || CFEqual(value, CFSTR(kIOPSInternalBatteryType)))
            return true;
    }
    return false;
}

}