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/CSSParser.h"
36 #include "core/css/CSSRuleList.h"
37 #include "core/css/CSSStyleSheet.h"
38 #include "core/dom/ExceptionCode.h"
39 #include "wtf/text/StringBuilder.h"
40
41 namespace WebCore {
42
CSSGroupingRule(StyleRuleGroup * groupRule,CSSStyleSheet * parent)43 CSSGroupingRule::CSSGroupingRule(StyleRuleGroup* groupRule, CSSStyleSheet* parent)
44 : CSSRule(parent)
45 , m_groupRule(groupRule)
46 , m_childRuleCSSOMWrappers(groupRule->childRules().size())
47 {
48 }
49
~CSSGroupingRule()50 CSSGroupingRule::~CSSGroupingRule()
51 {
52 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
53 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
54 if (m_childRuleCSSOMWrappers[i])
55 m_childRuleCSSOMWrappers[i]->setParentRule(0);
56 }
57 }
58
insertRule(const String & ruleString,unsigned index,ExceptionState & exceptionState)59 unsigned CSSGroupingRule::insertRule(const String& ruleString, unsigned index, ExceptionState& exceptionState)
60 {
61 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
62
63 if (index > m_groupRule->childRules().size()) {
64 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " must be less than or equal to the length of the rule list.");
65 return 0;
66 }
67
68 CSSStyleSheet* styleSheet = parentStyleSheet();
69 CSSParser parser(parserContext(), UseCounter::getFrom(styleSheet));
70 RefPtr<StyleRuleBase> newRule = parser.parseRule(styleSheet ? styleSheet->contents() : 0, ruleString);
71 if (!newRule) {
72 exceptionState.throwDOMException(SyntaxError, "the rule '" + ruleString + "' is invalid and cannot be parsed.");
73 return 0;
74 }
75
76 if (newRule->isImportRule()) {
77 // FIXME: an HierarchyRequestError should also be thrown for a @charset or a nested
78 // @media rule. They are currently not getting parsed, resulting in a SyntaxError
79 // to get raised above.
80 exceptionState.throwDOMException(HierarchyRequestError, "'@import' rules cannot be inserted inside a group rule.");
81 return 0;
82 }
83 CSSStyleSheet::RuleMutationScope mutationScope(this);
84
85 m_groupRule->wrapperInsertRule(index, newRule);
86
87 m_childRuleCSSOMWrappers.insert(index, RefPtr<CSSRule>());
88 return index;
89 }
90
deleteRule(unsigned index,ExceptionState & exceptionState)91 void CSSGroupingRule::deleteRule(unsigned index, ExceptionState& exceptionState)
92 {
93 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
94
95 if (index >= m_groupRule->childRules().size()) {
96 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " is greated than the length of the rule list.");
97 return;
98 }
99
100 CSSStyleSheet::RuleMutationScope mutationScope(this);
101
102 m_groupRule->wrapperRemoveRule(index);
103
104 if (m_childRuleCSSOMWrappers[index])
105 m_childRuleCSSOMWrappers[index]->setParentRule(0);
106 m_childRuleCSSOMWrappers.remove(index);
107 }
108
appendCSSTextForItems(StringBuilder & result) const109 void CSSGroupingRule::appendCSSTextForItems(StringBuilder& result) const
110 {
111 unsigned size = length();
112 for (unsigned i = 0; i < size; ++i) {
113 result.appendLiteral(" ");
114 result.append(item(i)->cssText());
115 result.append('\n');
116 }
117 }
118
length() const119 unsigned CSSGroupingRule::length() const
120 {
121 return m_groupRule->childRules().size();
122 }
123
item(unsigned index) const124 CSSRule* CSSGroupingRule::item(unsigned index) const
125 {
126 if (index >= length())
127 return 0;
128 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
129 RefPtr<CSSRule>& rule = m_childRuleCSSOMWrappers[index];
130 if (!rule)
131 rule = m_groupRule->childRules()[index]->createCSSOMWrapper(const_cast<CSSGroupingRule*>(this));
132 return rule.get();
133 }
134
cssRules() const135 CSSRuleList* CSSGroupingRule::cssRules() const
136 {
137 if (!m_ruleListCSSOMWrapper)
138 m_ruleListCSSOMWrapper = adoptPtr(new LiveCSSRuleList<CSSGroupingRule>(const_cast<CSSGroupingRule*>(this)));
139 return m_ruleListCSSOMWrapper.get();
140 }
141
reattach(StyleRuleBase * rule)142 void CSSGroupingRule::reattach(StyleRuleBase* rule)
143 {
144 ASSERT(rule);
145 m_groupRule = static_cast<StyleRuleGroup*>(rule);
146 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
147 if (m_childRuleCSSOMWrappers[i])
148 m_childRuleCSSOMWrappers[i]->reattach(m_groupRule->childRules()[i].get());
149 }
150 }
151
152 } // namespace WebCore
153