Source/WebCore/rendering/RenderLinesClampFlow.h

/*
 * Copyright (C) 2017,2018 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. ``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
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 */

#pragma once

#include "RenderMultiColumnFlow.h"
#include <wtf/HashMap.h>

namespace WebCore {

class RenderLinesClampFlow final : public RenderMultiColumnFlow {
    WTF_MAKE_ISO_ALLOCATED(RenderLinesClampFlow);
public:
    RenderLinesClampFlow(Document&, RenderStyle&&);
    ~RenderLinesClampFlow();

    bool isChildAllowedInFragmentedFlow(const RenderBlockFlow&, const RenderElement&) const;

    bool isRenderLinesClampFlow() const override { return true; }

    void layoutFlowExcludedObjects(bool relayoutChildren) override;
    
    bool singleFragmentHasUniformLogicalHeight() const override { return false; }
    
private:
    RenderPtr<RenderMultiColumnSet> createMultiColumnSet(RenderStyle&&) override;
    
    // Disable spans and breaks.
    bool isColumnSpanningDescendant(const RenderBox&) const override { return false; }
    bool addForcedFragmentBreak(const RenderBlock*, LayoutUnit, RenderBox*, bool, LayoutUnit* = 0) override { return false; }
    
private:
    const char* renderName() const override;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderLinesClampFlow, isRenderLinesClampFlow())