/*
* Copyright (C) 2019 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
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "config.h"
#include "UserInterfaceIdiom.h"

#if PLATFORM(IOS_FAMILY)

#if USE(APPLE_INTERNAL_SDK)
#import <UIKit/UIDevice_Private.h>
#else
#import <UIKit/UIDevice.h>
#endif

namespace WebKit {

enum class UserInterfaceIdiomState : uint8_t {
    IsPad,
    IsNotPad,
    Unknown,
};

static UserInterfaceIdiomState userInterfaceIdiomIsPadState = UserInterfaceIdiomState::Unknown;

#if PLATFORM(IOS_FAMILY)
static inline bool userInterfaceIdiomIsPad()
{
    // This inline function exists to thwart unreachable code
    // detection on platforms where UICurrentUserInterfaceIdiomIsPad
    // is defined directly to false.
#if USE(APPLE_INTERNAL_SDK) && !PLATFORM(MACCATALYST)
    return UICurrentUserInterfaceIdiomIsPad();
#else
    return [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad;
#endif
}
#endif

bool currentUserInterfaceIdiomIsPad()
{
    if (userInterfaceIdiomIsPadState == UserInterfaceIdiomState::Unknown)
        setCurrentUserInterfaceIdiomIsPad(userInterfaceIdiomIsPad());

    return userInterfaceIdiomIsPadState == UserInterfaceIdiomState::IsPad;
}

void setCurrentUserInterfaceIdiomIsPad(bool isPad)
{
    userInterfaceIdiomIsPadState = isPad ? UserInterfaceIdiomState::IsPad : UserInterfaceIdiomState::IsNotPad;
}

}

#endif