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/*
* 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
* 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 "LayoutUnit.h"
#include <wtf/IsoMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace Layout {
class FormattingState;
class Box;
class FormattingContext {
WTF_MAKE_ISO_ALLOCATED(FormattingContext);
public:
FormattingContext(Box& formattingContextRoot);
virtual ~FormattingContext();
virtual void layout(FormattingState&) = 0;
virtual std::unique_ptr<FormattingState> formattingState() const = 0;
const Box& root() const { return *m_root; }
protected:
virtual void computeStaticPosition(const Box&) const;
virtual void computeInFlowPositionedPosition(const Box&) const;
virtual void computeOutOfFlowPosition(const Box&) const;
virtual void computeWidth(const Box&) const;
virtual void computeHeight(const Box&) const;
virtual LayoutUnit marginTop(const Box&) const;
virtual LayoutUnit marginLeft(const Box&) const;
virtual LayoutUnit marginBottom(const Box&) const;
virtual LayoutUnit marginRight(const Box&) const;
private:
WeakPtr<Box> m_root;
};
}
}
#endif