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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 #include "config.h" | |
24 #include "core/rendering/RenderTextFragment.h" | |
25 | |
26 #include "core/dom/FirstLetterPseudoElement.h" | |
27 #include "core/dom/PseudoElement.h" | |
28 #include "core/dom/StyleChangeReason.h" | |
29 #include "core/dom/Text.h" | |
30 #include "core/layout/HitTestResult.h" | |
31 #include "core/layout/LayoutBlock.h" | |
32 | |
33 namespace blink { | |
34 | |
35 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOff
set, int length) | |
36 : RenderText(node, str ? str->substring(startOffset, length) : PassRefPtr<St
ringImpl>(nullptr)) | |
37 , m_start(startOffset) | |
38 , m_end(length) | |
39 , m_isRemainingTextRenderer(false) | |
40 , m_contentString(str) | |
41 , m_firstLetterPseudoElement(nullptr) | |
42 { | |
43 } | |
44 | |
45 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str) | |
46 : RenderText(node, str) | |
47 , m_start(0) | |
48 , m_end(str ? str->length() : 0) | |
49 , m_isRemainingTextRenderer(false) | |
50 , m_contentString(str) | |
51 , m_firstLetterPseudoElement(nullptr) | |
52 { | |
53 } | |
54 | |
55 RenderTextFragment::~RenderTextFragment() | |
56 { | |
57 ASSERT(!m_firstLetterPseudoElement); | |
58 } | |
59 | |
60 void RenderTextFragment::destroy() | |
61 { | |
62 if (m_isRemainingTextRenderer && m_firstLetterPseudoElement) | |
63 m_firstLetterPseudoElement->setRemainingTextRenderer(nullptr); | |
64 m_firstLetterPseudoElement = nullptr; | |
65 RenderText::destroy(); | |
66 } | |
67 | |
68 PassRefPtr<StringImpl> RenderTextFragment::completeText() const | |
69 { | |
70 Text* text = associatedTextNode(); | |
71 return text ? text->dataImpl() : contentString(); | |
72 } | |
73 | |
74 void RenderTextFragment::setContentString(StringImpl* str) | |
75 { | |
76 m_contentString = str; | |
77 setText(str); | |
78 } | |
79 | |
80 PassRefPtr<StringImpl> RenderTextFragment::originalText() const | |
81 { | |
82 RefPtr<StringImpl> result = completeText(); | |
83 if (!result) | |
84 return nullptr; | |
85 return result->substring(start(), end()); | |
86 } | |
87 | |
88 void RenderTextFragment::setText(PassRefPtr<StringImpl> text, bool force) | |
89 { | |
90 RenderText::setText(text, force); | |
91 | |
92 m_start = 0; | |
93 m_end = textLength(); | |
94 | |
95 // If we're the remaining text from a first letter then we have to tell the | |
96 // first letter pseudo element to reattach itself so it can re-calculate the | |
97 // correct first-letter settings. | |
98 if (LayoutObject* previous = previousSibling()) { | |
99 if (!previous->isPseudoElement() || !previous->node()->isFirstLetterPseu
doElement()) | |
100 return; | |
101 | |
102 // Tell the first letter container node, and the first-letter node | |
103 // that their text content changed. | |
104 toFirstLetterPseudoElement(previous->node())->updateTextFragments(); | |
105 } | |
106 } | |
107 | |
108 void RenderTextFragment::setTextFragment(PassRefPtr<StringImpl> text, unsigned s
tart, unsigned length) | |
109 { | |
110 RenderText::setText(text, false); | |
111 | |
112 m_start = start; | |
113 m_end = length; | |
114 } | |
115 | |
116 void RenderTextFragment::transformText() | |
117 { | |
118 // Note, we have to call RenderText::setText here because, if we use our | |
119 // version we will, potentially, screw up the first-letter settings where | |
120 // we only use portions of the string. | |
121 if (RefPtr<StringImpl> textToTransform = originalText()) | |
122 RenderText::setText(textToTransform.release(), true); | |
123 } | |
124 | |
125 UChar RenderTextFragment::previousCharacter() const | |
126 { | |
127 if (start()) { | |
128 StringImpl* original = completeText().get(); | |
129 if (original && start() <= original->length()) | |
130 return (*original)[start() - 1]; | |
131 } | |
132 | |
133 return RenderText::previousCharacter(); | |
134 } | |
135 | |
136 // If this is the renderer for a first-letter pseudoNode then we have to look | |
137 // at the node for the remaining text to find our content. | |
138 Text* RenderTextFragment::associatedTextNode() const | |
139 { | |
140 Node* node = this->firstLetterPseudoElement(); | |
141 if (m_isRemainingTextRenderer || !node) { | |
142 // If we don't have a node, then we aren't part of a first-letter pseudo | |
143 // element, so use the actual node. Likewise, if we have a node, but | |
144 // we're the remainingTextRenderer for a pseudo element use the real | |
145 // text node. | |
146 node = this->node(); | |
147 } | |
148 | |
149 if (!node) | |
150 return nullptr; | |
151 | |
152 if (node->isFirstLetterPseudoElement()) { | |
153 FirstLetterPseudoElement* pseudo = toFirstLetterPseudoElement(node); | |
154 LayoutObject* nextRenderer = FirstLetterPseudoElement::firstLetterTextRe
nderer(*pseudo); | |
155 if (!nextRenderer) | |
156 return nullptr; | |
157 node = nextRenderer->node(); | |
158 } | |
159 return (node && node->isTextNode()) ? toText(node) : nullptr; | |
160 } | |
161 | |
162 } // namespace blink | |
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