/*
 * 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
 * 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.
 */

#pragma once

#if ENABLE(LAYOUT_FORMATTING_CONTEXT)

#include "FlexFormattingState.h"
#include "FormattingContext.h"
#include <wtf/IsoMalloc.h>

namespace WebCore {
namespace Layout {

class FlexFormattingGeometry;
class InvalidationState;
// This class implements the layout logic for flex formatting contexts.
// https://www.w3.org/TR/css-flexbox-1/
class FlexFormattingContext final : public FormattingContext {
    WTF_MAKE_ISO_ALLOCATED(FlexFormattingContext);
public:
    FlexFormattingContext(const ContainerBox& formattingContextRoot, FlexFormattingState&);
    void layoutInFlowContent(InvalidationState&, const ConstraintsForInFlowContent&) override;
    LayoutUnit usedContentHeight() const override;

    IntrinsicWidthConstraints computedIntrinsicWidthConstraints() override;

private:
    FlexFormattingGeometry flexFormattingGeometry() const;

    void sizeAndPlaceFlexItems(const ConstraintsForInFlowContent&);
    void computeIntrinsicWidthConstraintsForFlexItems();

    const FlexFormattingState& formattingState() const { return downcast<FlexFormattingState>(FormattingContext::formattingState()); }
    FlexFormattingState& formattingState() { return downcast<FlexFormattingState>(FormattingContext::formattingState()); }
};

}
}

SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_CONTEXT(FlexFormattingContext, isFlexFormattingContext())

#endif
