Source/WebCore/layout/blockformatting/BlockFormattingState.h

/*
 * Copyright (C) 2018 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
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 */

#pragma once

#if ENABLE(LAYOUT_FORMATTING_CONTEXT)

#include "FormattingState.h"
#include <wtf/IsoMalloc.h>

namespace WebCore {
namespace Layout {

// BlockFormattingState holds the state for a particular block formatting context tree.
class BlockFormattingState : public FormattingState {
    WTF_MAKE_ISO_ALLOCATED(BlockFormattingState);
public:
    BlockFormattingState(Ref<FloatingState>&&, LayoutState&);
    virtual ~BlockFormattingState();

    void setPositiveAndNegativeVerticalMargin(const Box& layoutBox, PositiveAndNegativeVerticalMargin verticalMargin) { m_positiveAndNegativeVerticalMargin.set(&layoutBox, verticalMargin); }
    bool hasPositiveAndNegativeVerticalMargin(const Box& layoutBox) const { return m_positiveAndNegativeVerticalMargin.contains(&layoutBox); }
    PositiveAndNegativeVerticalMargin positiveAndNegativeVerticalMargin(const Box& layoutBox) const { return m_positiveAndNegativeVerticalMargin.get(&layoutBox); }

private:
    HashMap<const Box*, PositiveAndNegativeVerticalMargin> m_positiveAndNegativeVerticalMargin;
};

}
}

SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_STATE(BlockFormattingState, isBlockFormattingState())

#endif