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, 2007, 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 Text_h
24#define Text_h
25
26#include "core/dom/CharacterData.h"
27
28namespace blink {
29
30class ExceptionState;
31class RenderText;
32
33class Text : public CharacterData {
34    DEFINE_WRAPPERTYPEINFO();
35public:
36    static const unsigned defaultLengthLimit = 1 << 16;
37
38    static PassRefPtrWillBeRawPtr<Text> create(Document&, const String&);
39    static PassRefPtrWillBeRawPtr<Text> createEditingText(Document&, const String&);
40
41    RenderText* renderer() const;
42
43    // mergeNextSiblingNodesIfPossible() merges next sibling nodes if possible
44    // then returns a node not merged.
45    PassRefPtrWillBeRawPtr<Node> mergeNextSiblingNodesIfPossible();
46    PassRefPtrWillBeRawPtr<Text> splitText(unsigned offset, ExceptionState&);
47
48    // DOM Level 3: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-1312295772
49
50    String wholeText() const;
51    PassRefPtrWillBeRawPtr<Text> replaceWholeText(const String&);
52
53    void recalcTextStyle(StyleRecalcChange, Text* nextTextSibling);
54    bool textRendererIsNeeded(const RenderStyle&, const RenderObject& parent);
55    RenderText* createTextRenderer(RenderStyle*);
56    void updateTextRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData, RecalcStyleBehavior = DoNotRecalcStyle);
57
58    virtual void attach(const AttachContext& = AttachContext()) OVERRIDE FINAL;
59
60    virtual bool canContainRangeEndPoint() const OVERRIDE FINAL { return true; }
61    virtual NodeType nodeType() const OVERRIDE;
62
63protected:
64    Text(TreeScope& treeScope, const String& data, ConstructionType type)
65        : CharacterData(treeScope, data, type) { }
66
67private:
68    virtual String nodeName() const OVERRIDE;
69    virtual PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep = true) OVERRIDE FINAL;
70
71    bool isTextNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
72
73    bool needsWhitespaceRenderer();
74
75    virtual PassRefPtrWillBeRawPtr<Text> cloneWithData(const String&);
76
77#ifndef NDEBUG
78    virtual void formatForDebugger(char* buffer, unsigned length) const OVERRIDE;
79#endif
80};
81
82DEFINE_NODE_TYPE_CASTS(Text, isTextNode());
83
84} // namespace blink
85
86#endif // Text_h
87