Source/WebCore/rendering/RenderRuby.h

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#pragma once

#include "RenderBlockFlow.h"
#include "RenderInline.h"

namespace WebCore {

// Following the HTML 5 spec, the box object model for a <ruby> element allows several runs of ruby
// bases with their respective ruby texts looks as follows:
//
// 1 RenderRuby object, corresponding to the whole <ruby> HTML element
//      1+ RenderRubyRun (anonymous)
//          0 or 1 RenderRubyText - shuffled to the front in order to re-use existing block layouting
//              0-n inline object(s)
//          0 or 1 RenderRubyBase - contains the inline objects that make up the ruby base
//              1-n inline object(s)
//
// Note: <rp> elements are defined as having 'display:none' and thus normally are not assigned a renderer.
//
// Generated :before/:after content is shunted into anonymous inline blocks

// <ruby> when used as 'display:inline'
class RenderRubyAsInline final : public RenderInline {
    WTF_MAKE_ISO_ALLOCATED(RenderRubyAsInline);
public:
    RenderRubyAsInline(Element&, RenderStyle&&);
    virtual ~RenderRubyAsInline();

private:
    void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;

    bool isRubyInline() const final { return true; }
    ASCIILiteral renderName() const override { return "RenderRuby (inline)"_s; }
    bool createsAnonymousWrapper() const override { return true; }
};

// <ruby> when used as 'display:block' or 'display:inline-block'
class RenderRubyAsBlock final : public RenderBlockFlow {
    WTF_MAKE_ISO_ALLOCATED(RenderRubyAsBlock);
public:
    RenderRubyAsBlock(Element&, RenderStyle&&);
    virtual ~RenderRubyAsBlock();

    Element& element() const { return downcast<Element>(nodeForNonAnonymous()); }

private:
    void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;

    bool isRubyBlock() const final { return true; }
    ASCIILiteral renderName() const override { return "RenderRuby (block)"_s; }
    bool createsAnonymousWrapper() const override { return true; }
};


inline bool isRuby(const RenderObject& renderer) { return (is<RenderRubyAsInline>(renderer) || is<RenderRubyAsBlock>(renderer)); }
inline bool isRuby(const RenderObject* renderer) { return (renderer && isRuby(*renderer)); }

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderRubyAsInline, isRubyInline())
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderRubyAsBlock, isRubyBlock())