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1 /* | |
2 * (C) 1999 Lars Knoll (knoll@kde.org) | |
3 * (C) 2000 Dirk Mueller (mueller@kde.org) | |
4 * Copyright (C) 2004, 2005, 2006, 2007 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 RenderTextFragment_h | |
24 #define RenderTextFragment_h | |
25 | |
26 #include "core/rendering/RenderText.h" | |
27 | |
28 namespace blink { | |
29 | |
30 class FirstLetterPseudoElement; | |
31 | |
32 // Used to represent a text substring of an element, e.g., for text runs that ar
e split because of | |
33 // first letter and that must therefore have different styles (and positions in
the render tree). | |
34 // We cache offsets so that text transformations can be applied in such a way th
at we can recover | |
35 // the original unaltered string from our corresponding DOM node. | |
36 class RenderTextFragment final : public RenderText { | |
37 public: | |
38 RenderTextFragment(Node*, StringImpl*, int startOffset, int length); | |
39 RenderTextFragment(Node*, StringImpl*); | |
40 virtual ~RenderTextFragment(); | |
41 virtual void destroy() override; | |
42 | |
43 virtual bool isTextFragment() const override { return true; } | |
44 | |
45 virtual bool canBeSelectionLeaf() const override { return node() && node()->
hasEditableStyle(); } | |
46 | |
47 unsigned start() const { return m_start; } | |
48 unsigned end() const { return m_end; } | |
49 | |
50 virtual unsigned textStartOffset() const override { return start(); } | |
51 | |
52 void setContentString(StringImpl*); | |
53 StringImpl* contentString() const { return m_contentString.get(); } | |
54 // The complete text is all of the text in the associated DOM text node. | |
55 PassRefPtr<StringImpl> completeText() const; | |
56 // The fragment text is the text which will be used by this RenderTextFragme
nt. For | |
57 // things like first-letter this may differ from the completeText as we mayb
e using | |
58 // only a portion of the text nodes content. | |
59 | |
60 virtual PassRefPtr<StringImpl> originalText() const override; | |
61 | |
62 virtual void setText(PassRefPtr<StringImpl>, bool force = false) override; | |
63 void setTextFragment(PassRefPtr<StringImpl>, unsigned start, unsigned length
); | |
64 | |
65 virtual void transformText() override; | |
66 | |
67 virtual const char* renderName() const override final { return "RenderTextFr
agment"; } | |
68 | |
69 void setFirstLetterPseudoElement(FirstLetterPseudoElement* element) { m_firs
tLetterPseudoElement = element; } | |
70 FirstLetterPseudoElement* firstLetterPseudoElement() const { return m_firstL
etterPseudoElement; } | |
71 | |
72 void setIsRemainingTextRenderer(bool isRemainingText) { m_isRemainingTextRen
derer = isRemainingText; } | |
73 bool isRemainingTextRenderer() const { return m_isRemainingTextRenderer; } | |
74 | |
75 private: | |
76 LayoutBlock* blockForAccompanyingFirstLetter() const; | |
77 virtual UChar previousCharacter() const override; | |
78 | |
79 Text* associatedTextNode() const; | |
80 | |
81 unsigned m_start; | |
82 unsigned m_end; | |
83 bool m_isRemainingTextRenderer; | |
84 RefPtr<StringImpl> m_contentString; | |
85 // Reference back to FirstLetterPseudoElement; cleared by FirstLetterPseudoE
lement::detach() if | |
86 // it goes away first. | |
87 FirstLetterPseudoElement* m_firstLetterPseudoElement; | |
88 }; | |
89 | |
90 DEFINE_TYPE_CASTS(RenderTextFragment, LayoutObject, object, toRenderText(object)
->isTextFragment(), toRenderText(object).isTextFragment()); | |
91 | |
92 } // namespace blink | |
93 | |
94 #endif // RenderTextFragment_h | |
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