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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef CharacterData_h
     24 #define CharacterData_h
     25 
     26 #include "core/dom/Node.h"
     27 #include "wtf/text/WTFString.h"
     28 
     29 namespace blink {
     30 
     31 class ExceptionState;
     32 
     33 class CharacterData : public Node {
     34     DEFINE_WRAPPERTYPEINFO();
     35 public:
     36     void atomize();
     37     const String& data() const { return m_data; }
     38     void setData(const String&);
     39     unsigned length() const { return m_data.length(); }
     40     String substringData(unsigned offset, unsigned count, ExceptionState&);
     41     void appendData(const String&);
     42     void replaceData(unsigned offset, unsigned count, const String&, ExceptionState&);
     43 
     44     enum RecalcStyleBehavior { DoNotRecalcStyle, DeprecatedRecalcStyleImmediatlelyForEditing };
     45     void insertData(unsigned offset, const String&, ExceptionState&, RecalcStyleBehavior = DoNotRecalcStyle);
     46     void deleteData(unsigned offset, unsigned count, ExceptionState&, RecalcStyleBehavior = DoNotRecalcStyle);
     47 
     48     bool containsOnlyWhitespace() const;
     49 
     50     StringImpl* dataImpl() { return m_data.impl(); }
     51 
     52     void parserAppendData(const String&);
     53 
     54 protected:
     55     CharacterData(TreeScope& treeScope, const String& text, ConstructionType type)
     56         : Node(&treeScope, type)
     57         , m_data(!text.isNull() ? text : emptyString())
     58     {
     59         ASSERT(type == CreateOther || type == CreateText || type == CreateEditingText);
     60     }
     61 
     62     void setDataWithoutUpdate(const String& data)
     63     {
     64         ASSERT(!data.isNull());
     65         m_data = data;
     66     }
     67     void didModifyData(const String& oldValue);
     68 
     69     String m_data;
     70 
     71 private:
     72     virtual String nodeValue() const OVERRIDE FINAL;
     73     virtual void setNodeValue(const String&) OVERRIDE FINAL;
     74     virtual bool isCharacterDataNode() const OVERRIDE FINAL { return true; }
     75     virtual int maxCharacterOffset() const OVERRIDE FINAL;
     76     virtual bool offsetInCharacters() const OVERRIDE FINAL;
     77     void setDataAndUpdate(const String&, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength, RecalcStyleBehavior = DoNotRecalcStyle);
     78 
     79     bool isContainerNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
     80     bool isElementNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
     81 };
     82 
     83 DEFINE_NODE_TYPE_CASTS(CharacterData, isCharacterDataNode());
     84 
     85 } // namespace blink
     86 
     87 #endif // CharacterData_h
     88