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 "RenderTextFragment.h"
25
26 #include "RenderBlock.h"
27 #include "Text.h"
28
29 namespace WebCore {
30
RenderTextFragment(Node * node,StringImpl * str,int startOffset,int length)31 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
32 : RenderText(node, str ? str->substring(startOffset, length) : 0)
33 , m_start(startOffset)
34 , m_end(length)
35 , m_firstLetter(0)
36 {
37 }
38
RenderTextFragment(Node * node,StringImpl * str)39 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
40 : RenderText(node, str)
41 , m_start(0)
42 , m_end(str ? str->length() : 0)
43 , m_contentString(str)
44 , m_firstLetter(0)
45 {
46 }
47
~RenderTextFragment()48 RenderTextFragment::~RenderTextFragment()
49 {
50 }
51
originalText() const52 PassRefPtr<StringImpl> RenderTextFragment::originalText() const
53 {
54 Node* e = node();
55 RefPtr<StringImpl> result = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
56 if (!result)
57 return 0;
58 return result->substring(start(), end());
59 }
60
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)61 void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
62 {
63 RenderText::styleDidChange(diff, oldStyle);
64
65 if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
66 block->style()->removeCachedPseudoStyle(FIRST_LETTER);
67 block->updateFirstLetter();
68 }
69 }
70
destroy()71 void RenderTextFragment::destroy()
72 {
73 if (m_firstLetter)
74 m_firstLetter->destroy();
75 RenderText::destroy();
76 }
77
setTextInternal(PassRefPtr<StringImpl> text)78 void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)
79 {
80 RenderText::setTextInternal(text);
81 if (m_firstLetter) {
82 ASSERT(!m_contentString);
83 m_firstLetter->destroy();
84 m_firstLetter = 0;
85 m_start = 0;
86 m_end = textLength();
87 if (Node* t = node()) {
88 ASSERT(!t->renderer());
89 t->setRenderer(this);
90 }
91 }
92 }
93
previousCharacter() const94 UChar RenderTextFragment::previousCharacter() const
95 {
96 if (start()) {
97 Node* e = node();
98 StringImpl* original = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
99 if (original && start() <= original->length())
100 return (*original)[start() - 1];
101 }
102
103 return RenderText::previousCharacter();
104 }
105
blockForAccompanyingFirstLetter() const106 RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() const
107 {
108 if (!m_firstLetter)
109 return 0;
110 for (RenderObject* block = m_firstLetter->parent(); block; block = block->parent()) {
111 if (block->style()->hasPseudoStyle(FIRST_LETTER) && block->canHaveChildren() && block->isRenderBlock())
112 return toRenderBlock(block);
113 }
114 return 0;
115 }
116
117 } // namespace WebCore
118