1 /*
2 * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
3 * Copyright (C) 2012 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "core/css/CSSGroupingRule.h"
33
34 #include "bindings/v8/ExceptionState.h"
35 #include "core/css/parser/BisonCSSParser.h"
36 #include "core/css/CSSRuleList.h"
37 #include "core/css/CSSStyleSheet.h"
38 #include "core/dom/ExceptionCode.h"
39 #include "core/frame/UseCounter.h"
40 #include "wtf/text/StringBuilder.h"
41
42 namespace WebCore {
43
CSSGroupingRule(StyleRuleGroup * groupRule,CSSStyleSheet * parent)44 CSSGroupingRule::CSSGroupingRule(StyleRuleGroup* groupRule, CSSStyleSheet* parent)
45 : CSSRule(parent)
46 , m_groupRule(groupRule)
47 , m_childRuleCSSOMWrappers(groupRule->childRules().size())
48 {
49 }
50
~CSSGroupingRule()51 CSSGroupingRule::~CSSGroupingRule()
52 {
53 #if !ENABLE(OILPAN)
54 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
55 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
56 if (m_childRuleCSSOMWrappers[i])
57 m_childRuleCSSOMWrappers[i]->setParentRule(0);
58 }
59 #endif
60 }
61
insertRule(const String & ruleString,unsigned index,ExceptionState & exceptionState)62 unsigned CSSGroupingRule::insertRule(const String& ruleString, unsigned index, ExceptionState& exceptionState)
63 {
64 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
65
66 if (index > m_groupRule->childRules().size()) {
67 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " must be less than or equal to the length of the rule list.");
68 return 0;
69 }
70
71 CSSStyleSheet* styleSheet = parentStyleSheet();
72 CSSParserContext context(parserContext(), UseCounter::getFrom(styleSheet));
73 BisonCSSParser parser(context);
74 RefPtrWillBeRawPtr<StyleRuleBase> newRule = parser.parseRule(styleSheet ? styleSheet->contents() : 0, ruleString);
75 if (!newRule) {
76 exceptionState.throwDOMException(SyntaxError, "the rule '" + ruleString + "' is invalid and cannot be parsed.");
77 return 0;
78 }
79
80 if (newRule->isImportRule()) {
81 // FIXME: an HierarchyRequestError should also be thrown for a @charset or a nested
82 // @media rule. They are currently not getting parsed, resulting in a SyntaxError
83 // to get raised above.
84 exceptionState.throwDOMException(HierarchyRequestError, "'@import' rules cannot be inserted inside a group rule.");
85 return 0;
86 }
87 CSSStyleSheet::RuleMutationScope mutationScope(this);
88
89 m_groupRule->wrapperInsertRule(index, newRule);
90
91 m_childRuleCSSOMWrappers.insert(index, RefPtrWillBeMember<CSSRule>(nullptr));
92 return index;
93 }
94
deleteRule(unsigned index,ExceptionState & exceptionState)95 void CSSGroupingRule::deleteRule(unsigned index, ExceptionState& exceptionState)
96 {
97 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
98
99 if (index >= m_groupRule->childRules().size()) {
100 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " is greated than the length of the rule list.");
101 return;
102 }
103
104 CSSStyleSheet::RuleMutationScope mutationScope(this);
105
106 m_groupRule->wrapperRemoveRule(index);
107
108 if (m_childRuleCSSOMWrappers[index])
109 m_childRuleCSSOMWrappers[index]->setParentRule(0);
110 m_childRuleCSSOMWrappers.remove(index);
111 }
112
appendCSSTextForItems(StringBuilder & result) const113 void CSSGroupingRule::appendCSSTextForItems(StringBuilder& result) const
114 {
115 unsigned size = length();
116 for (unsigned i = 0; i < size; ++i) {
117 result.appendLiteral(" ");
118 result.append(item(i)->cssText());
119 result.append('\n');
120 }
121 }
122
length() const123 unsigned CSSGroupingRule::length() const
124 {
125 return m_groupRule->childRules().size();
126 }
127
item(unsigned index) const128 CSSRule* CSSGroupingRule::item(unsigned index) const
129 {
130 if (index >= length())
131 return 0;
132 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
133 RefPtrWillBeMember<CSSRule>& rule = m_childRuleCSSOMWrappers[index];
134 if (!rule)
135 rule = m_groupRule->childRules()[index]->createCSSOMWrapper(const_cast<CSSGroupingRule*>(this));
136 return rule.get();
137 }
138
cssRules() const139 CSSRuleList* CSSGroupingRule::cssRules() const
140 {
141 if (!m_ruleListCSSOMWrapper)
142 m_ruleListCSSOMWrapper = LiveCSSRuleList<CSSGroupingRule>::create(const_cast<CSSGroupingRule*>(this));
143 return m_ruleListCSSOMWrapper.get();
144 }
145
reattach(StyleRuleBase * rule)146 void CSSGroupingRule::reattach(StyleRuleBase* rule)
147 {
148 ASSERT(rule);
149 m_groupRule = static_cast<StyleRuleGroup*>(rule);
150 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
151 if (m_childRuleCSSOMWrappers[i])
152 m_childRuleCSSOMWrappers[i]->reattach(m_groupRule->childRules()[i].get());
153 }
154 }
155
trace(Visitor * visitor)156 void CSSGroupingRule::trace(Visitor* visitor)
157 {
158 CSSRule::trace(visitor);
159 #if ENABLE(OILPAN)
160 visitor->trace(m_childRuleCSSOMWrappers);
161 #endif
162 visitor->trace(m_groupRule);
163 visitor->trace(m_ruleListCSSOMWrapper);
164 }
165
166 } // namespace WebCore
167