1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@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 "Node.h"
27
28namespace WebCore {
29
30class CharacterData : public Node {
31public:
32    String data() const { return m_data; }
33    void setData(const String&, ExceptionCode&);
34    unsigned length() const { return m_data->length(); }
35    String substringData(unsigned offset, unsigned count, ExceptionCode&);
36    void appendData(const String&, ExceptionCode&);
37    void insertData(unsigned offset, const String&, ExceptionCode&);
38    void deleteData(unsigned offset, unsigned count, ExceptionCode&);
39    void replaceData(unsigned offset, unsigned count, const String&, ExceptionCode&);
40
41    bool containsOnlyWhitespace() const;
42
43    StringImpl* dataImpl() { return m_data.get(); }
44
45    // Like appendData, but optimized for the parser (e.g., no mutation events).
46    // Returns how much could be added before length limit was met.
47    unsigned parserAppendData(const UChar*, unsigned dataLength, unsigned lengthLimit);
48
49protected:
50    CharacterData(Document* document, const String& text, ConstructionType type)
51        : Node(document, type)
52        , m_data(text.impl() ? text.impl() : StringImpl::empty())
53    {
54        ASSERT(type == CreateComment || type == CreateText);
55    }
56
57    virtual bool rendererIsNeeded(RenderStyle*);
58
59    void setDataImpl(PassRefPtr<StringImpl> impl) { m_data = impl; }
60    void dispatchModifiedEvent(StringImpl* oldValue);
61
62private:
63    virtual String nodeValue() const;
64    virtual void setNodeValue(const String&, ExceptionCode&);
65    virtual bool isCharacterDataNode() const { return true; }
66    virtual int maxCharacterOffset() const;
67    virtual bool offsetInCharacters() const;
68    void setDataAndUpdate(PassRefPtr<StringImpl>, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength);
69    void updateRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData);
70    void checkCharDataOperation(unsigned offset, ExceptionCode&);
71
72    RefPtr<StringImpl> m_data;
73};
74
75} // namespace WebCore
76
77#endif // CharacterData_h
78
79