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* (C) 1999 Lars Knoll (
* (C) 2000 Dirk Mueller (
* 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
* 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 {
// 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 {
RenderTextFragment(Node*, StringImpl*, int startOffset, int length);
RenderTextFragment(Node*, StringImpl*);
virtual ~RenderTextFragment();
virtual void trace(Visitor*) 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(); }
RenderBoxModelObject* firstLetter() const { return m_firstLetter; }
void setFirstLetter(RenderBoxModelObject* firstLetter) { m_firstLetter = firstLetter; }
RenderText* firstRenderTextInFirstLetter() const;
void setContentString(StringImpl*);
virtual PassRefPtr<StringImpl> originalText() const override;
virtual void setText(PassRefPtr<StringImpl>, bool force = false) override;
virtual void transformText() override;
virtual const char* renderName() const override final { return "RenderTextFragment"; }
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
virtual void willBeDestroyed() override;
virtual UChar previousCharacter() const override;
RenderBlock* blockForAccompanyingFirstLetter() const;
virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) override;
unsigned m_start;
unsigned m_end;
RefPtr<StringImpl> m_contentString;
RawPtrWillBeMember<RenderBoxModelObject> m_firstLetter;
DEFINE_TYPE_CASTS(RenderTextFragment, RenderObject, object, toRenderText(object)->isTextFragment(), toRenderText(object).isTextFragment());
} // namespace blink
#endif // RenderTextFragment_h