/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 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 CharacterData_h
#define CharacterData_h

#include "core/CoreExport.h"
#include "core/dom/Node.h"
#include "wtf/text/WTFString.h"

namespace blink {

class ExceptionState;

class CORE_EXPORT CharacterData : public Node {
  DEFINE_WRAPPERTYPEINFO();

 public:
  void atomize();
  const String& data() const { return m_data; }
  void setData(const String&);
  unsigned length() const { return m_data.length(); }
  String substringData(unsigned offset, unsigned count, ExceptionState&);
  void appendData(const String&);
  void replaceData(unsigned offset,
                   unsigned count,
                   const String&,
                   ExceptionState&);

  void insertData(unsigned offset, const String&, ExceptionState&);
  void deleteData(unsigned offset, unsigned count, ExceptionState&);

  bool containsOnlyWhitespace() const;

  StringImpl* dataImpl() { return m_data.impl(); }

  void parserAppendData(const String&);

 protected:
  CharacterData(TreeScope& treeScope, const String& text, ConstructionType type)
      : Node(&treeScope, type), m_data(!text.isNull() ? text : emptyString()) {
    DCHECK(type == CreateOther || type == CreateText ||
           type == CreateEditingText);
  }

  void setDataWithoutUpdate(const String& data) {
    DCHECK(!data.isNull());
    m_data = data;
  }
  enum UpdateSource {
    UpdateFromParser,
    UpdateFromNonParser,
  };
  void didModifyData(const String& oldValue, UpdateSource);

  String m_data;

 private:
  String nodeValue() const final;
  void setNodeValue(const String&) final;
  bool isCharacterDataNode() const final { return true; }
  int maxCharacterOffset() const final;
  void setDataAndUpdate(const String&,
                        unsigned offsetOfReplacedData,
                        unsigned oldLength,
                        unsigned newLength,
                        UpdateSource = UpdateFromNonParser);

  bool isContainerNode() const =
      delete;  // This will catch anyone doing an unnecessary check.
  bool isElementNode() const =
      delete;  // This will catch anyone doing an unnecessary check.
};

DEFINE_NODE_TYPE_CASTS(CharacterData, isCharacterDataNode());

}  // namespace blink

#endif  // CharacterData_h
