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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.
*
*/
#pragma once
#include "RenderBoxModelObject.h"
#include "RenderText.h"
namespace WebCore {
// 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 {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(RenderTextFragment);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RenderTextFragment);
public:
RenderTextFragment(Text&, const String&, int startOffset, int length);
RenderTextFragment(Document&, const String&, int startOffset, int length);
RenderTextFragment(Document&, const String&);
virtual ~RenderTextFragment();
bool canBeSelectionLeaf() const override;
unsigned start() const { return m_start; }
unsigned end() const { return m_end; }
RenderBoxModelObject* firstLetter() const { return m_firstLetter.get(); }
void setFirstLetter(RenderBoxModelObject& firstLetter) { m_firstLetter = firstLetter; }
RenderBlock* blockForAccompanyingFirstLetter();
void setContentString(const String& text);
StringImpl* contentString() const { return m_contentString.impl(); }
const String& altText() const { return m_altText; }
void setAltText(const String& altText) { m_altText = altText; }
private:
void setTextInternal(const String&, bool force) override;
Vector<UChar> previousCharacter() const override;
unsigned m_start;
unsigned m_end;
// Alternative description that can be used for accessibility instead of the native text.
String m_altText;
String m_contentString;
SingleThreadWeakPtr<RenderBoxModelObject> m_firstLetter;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::RenderTextFragment)
static bool isType(const WebCore::RenderText& renderer) { return renderer.isRenderTextFragment(); }
static bool isType(const WebCore::RenderObject& renderer)
{
auto* text = dynamicDowncast<WebCore::RenderText>(renderer);
return text && isType(*text);
}
SPECIALIZE_TYPE_TRAITS_END()
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