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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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