third_party/blink/renderer/core/dom/character_data.h

/*
 * 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 THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"

namespace blink {

class ExceptionState;

class CORE_EXPORT CharacterData : public Node {
  DEFINE_WRAPPERTYPEINFO();

 public:
  void Atomize();
  const String& data() const { return data_; }
  void setData(const String&);
  unsigned length() const { return 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 ContainsOnlyWhitespaceOrEmpty() const;

  StringImpl* DataImpl() { return data_.Impl(); }

  void ParserAppendData(const String&);

 protected:
  CharacterData(TreeScope& tree_scope,
                const String& text,
                ConstructionType type)
      : Node(&tree_scope, type), data_(!text.IsNull() ? text : g_empty_string) {
    DCHECK(type == kCreateOther || type == kCreateText ||
           type == kCreateEditingText);
  }

  void SetDataWithoutUpdate(const String& data) {
    DCHECK(!data.IsNull());
    data_ = data;
  }
  enum UpdateSource {
    kUpdateFromParser,
    kUpdateFromNonParser,
  };
  void DidModifyData(const String& old_value, UpdateSource);

  String data_;

 private:
  String nodeValue() const final;
  void setNodeValue(const String&) final;
  bool IsCharacterDataNode() const final { return true; }
  void SetDataAndUpdate(const String&,
                        unsigned offset_of_replaced_data,
                        unsigned old_length,
                        unsigned new_length,
                        UpdateSource = kUpdateFromNonParser);

  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  // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_