1 /*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2002, 2005, 2006, 2008, 2012 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 #include "config.h"
23 #include "core/css/CSSStyleRule.h"
24
25 #include "core/css/CSSSelector.h"
26 #include "core/css/CSSStyleSheet.h"
27 #include "core/css/PropertySetCSSStyleDeclaration.h"
28 #include "core/css/StylePropertySet.h"
29 #include "core/css/StyleRule.h"
30 #include "core/css/parser/CSSParser.h"
31 #include "wtf/text/StringBuilder.h"
32
33 namespace blink {
34
35 typedef HashMap<const CSSStyleRule*, String> SelectorTextCache;
selectorTextCache()36 static SelectorTextCache& selectorTextCache()
37 {
38 DEFINE_STATIC_LOCAL(SelectorTextCache, cache, ());
39 return cache;
40 }
41
CSSStyleRule(StyleRule * styleRule,CSSStyleSheet * parent)42 CSSStyleRule::CSSStyleRule(StyleRule* styleRule, CSSStyleSheet* parent)
43 : CSSRule(parent)
44 , m_styleRule(styleRule)
45 {
46 }
47
~CSSStyleRule()48 CSSStyleRule::~CSSStyleRule()
49 {
50 #if !ENABLE(OILPAN)
51 if (m_propertiesCSSOMWrapper)
52 m_propertiesCSSOMWrapper->clearParentRule();
53 #endif
54 if (hasCachedSelectorText()) {
55 selectorTextCache().remove(this);
56 setHasCachedSelectorText(false);
57 }
58 }
59
style() const60 CSSStyleDeclaration* CSSStyleRule::style() const
61 {
62 if (!m_propertiesCSSOMWrapper) {
63 m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_styleRule->mutableProperties(), const_cast<CSSStyleRule*>(this));
64 }
65 return m_propertiesCSSOMWrapper.get();
66 }
67
generateSelectorText() const68 String CSSStyleRule::generateSelectorText() const
69 {
70 StringBuilder builder;
71 for (const CSSSelector* selector = m_styleRule->selectorList().first(); selector; selector = CSSSelectorList::next(*selector)) {
72 if (selector != m_styleRule->selectorList().first())
73 builder.appendLiteral(", ");
74 builder.append(selector->selectorText());
75 }
76 return builder.toString();
77 }
78
selectorText() const79 String CSSStyleRule::selectorText() const
80 {
81 if (hasCachedSelectorText()) {
82 ASSERT(selectorTextCache().contains(this));
83 return selectorTextCache().get(this);
84 }
85
86 ASSERT(!selectorTextCache().contains(this));
87 String text = generateSelectorText();
88 selectorTextCache().set(this, text);
89 setHasCachedSelectorText(true);
90 return text;
91 }
92
setSelectorText(const String & selectorText)93 void CSSStyleRule::setSelectorText(const String& selectorText)
94 {
95 CSSParserContext context(parserContext(), 0);
96 CSSParser p(context);
97 CSSSelectorList selectorList;
98 p.parseSelector(selectorText, selectorList);
99 if (!selectorList.isValid())
100 return;
101
102 CSSStyleSheet::RuleMutationScope mutationScope(this);
103
104 m_styleRule->wrapperAdoptSelectorList(selectorList);
105
106 if (hasCachedSelectorText()) {
107 selectorTextCache().remove(this);
108 setHasCachedSelectorText(false);
109 }
110 }
111
cssText() const112 String CSSStyleRule::cssText() const
113 {
114 StringBuilder result;
115 result.append(selectorText());
116 result.appendLiteral(" { ");
117 String decls = m_styleRule->properties().asText();
118 result.append(decls);
119 if (!decls.isEmpty())
120 result.append(' ');
121 result.append('}');
122 return result.toString();
123 }
124
reattach(StyleRuleBase * rule)125 void CSSStyleRule::reattach(StyleRuleBase* rule)
126 {
127 ASSERT(rule);
128 m_styleRule = toStyleRule(rule);
129 if (m_propertiesCSSOMWrapper)
130 m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
131 }
132
trace(Visitor * visitor)133 void CSSStyleRule::trace(Visitor* visitor)
134 {
135 visitor->trace(m_styleRule);
136 visitor->trace(m_propertiesCSSOMWrapper);
137 CSSRule::trace(visitor);
138 }
139
140 } // namespace blink
141