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/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef RenderTextFragment_h
#define RenderTextFragment_h
#include "core/rendering/RenderText.h"
namespace blink {
class FirstLetterPseudoElement;
// Used to represent a text substring of an element, e.g., for text runs that are split because of
// first letter and that must therefore have different styles (and positions in the render tree).
// We cache offsets so that text transformations can be applied in such a way that we can recover
// the original unaltered string from our corresponding DOM node.
class RenderTextFragment final : public RenderText {
public:
RenderTextFragment(Node*, StringImpl*, int startOffset, int length);
RenderTextFragment(Node*, StringImpl*);
virtual ~RenderTextFragment();
virtual void trace(Visitor*) override;
virtual void destroy() override;
virtual bool isTextFragment() const override { return true; }
virtual bool canBeSelectionLeaf() const override { return node() && node()->hasEditableStyle(); }
unsigned start() const { return m_start; }
unsigned end() const { return m_end; }
virtual unsigned textStartOffset() const override { return start(); }
void setContentString(StringImpl*);
StringImpl* contentString() const { return m_contentString.get(); }
// The complete text is all of the text in the associated DOM text node.
PassRefPtr<StringImpl> completeText() const;
// The fragment text is the text which will be used by this RenderTextFragment. For
// things like first-letter this may differ from the completeText as we maybe using
// only a portion of the text nodes content.
virtual PassRefPtr<StringImpl> originalText() const override;
virtual void setText(PassRefPtr<StringImpl>, bool force = false) override;
void setTextFragment(PassRefPtr<StringImpl>, unsigned start, unsigned length);
virtual void transformText() override;
virtual const char* renderName() const override final { return "RenderTextFragment"; }
void setFirstLetterPseudoElement(FirstLetterPseudoElement* element) { m_firstLetterPseudoElement = element; }
FirstLetterPseudoElement* firstLetterPseudoElement() const { return m_firstLetterPseudoElement; }
void setIsRemainingTextRenderer() { m_isRemainingTextRenderer = true; }
bool isRemainingTextRenderer() const { return m_isRemainingTextRenderer; }
private:
RenderBlock* blockForAccompanyingFirstLetter() const;
virtual UChar previousCharacter() const override;
Text* associatedTextNode() const;
unsigned m_start;
unsigned m_end;
bool m_isRemainingTextRenderer;
RefPtr<StringImpl> m_contentString;
RawPtrWillBeMember<FirstLetterPseudoElement> m_firstLetterPseudoElement;
};
DEFINE_TYPE_CASTS(RenderTextFragment, RenderObject, object, toRenderText(object)->isTextFragment(), toRenderText(object).isTextFragment());
} // namespace blink
#endif // RenderTextFragment_h
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