/*
 * Copyright (C) 2024 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 "AnchorPositionEvaluator.h"

#include "StyleBuilderState.h"

namespace WebCore::Style {

Length AnchorPositionEvaluator::resolveAnchorValue(const CSSAnchorValue* anchorValue, const BuilderState& builderState)
{
    auto* element = builderState.element();
    if (!element)
        return Length(0, LengthType::Fixed);

    auto* anchorPositionedStateMap = builderState.cssToLengthConversionData().anchorPositionedStateMap();
    if (!anchorPositionedStateMap)
        return Length(0, LengthType::Fixed);

    auto* anchorPositionedElementState = anchorPositionedStateMap->ensure(*element, [&] {
        return WTF::makeUnique<AnchorPositionedElementState>();
    }).iterator->value.get();

    if (!anchorPositionedElementState->finishedCollectingAnchorNames)
        anchorValue->collectAnchorNames(anchorPositionedElementState->anchorNames);

    if (!anchorPositionedElementState->readyToBeResolved)
        return Length(0, LengthType::Fixed);

    // FIXME: Actually resolve the value
    anchorPositionedElementState->hasBeenResolved = true;
    return Length(0, LengthType::Fixed);
}

}
