1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
4 * Copyright (C) 2012 Google Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "core/css/resolver/ScopedStyleResolver.h"
29
30 #include "core/HTMLNames.h"
31 #include "core/css/CSSStyleSheet.h"
32 #include "core/css/PageRuleCollector.h"
33 #include "core/css/RuleFeature.h"
34 #include "core/css/StyleRule.h"
35 #include "core/css/StyleSheetContents.h"
36 #include "core/css/resolver/StyleResolver.h" // For MatchRequest.
37 #include "core/css/resolver/ViewportStyleResolver.h"
38 #include "core/dom/Document.h"
39 #include "core/dom/shadow/ElementShadow.h"
40 #include "core/dom/shadow/ShadowRoot.h"
41 #include "core/html/HTMLStyleElement.h"
42
43 namespace blink {
44
treeScopeFor(Document & document,const CSSStyleSheet * sheet)45 TreeScope* ScopedStyleResolver::treeScopeFor(Document& document, const CSSStyleSheet* sheet)
46 {
47 ASSERT(sheet);
48
49 if (!sheet->ownerDocument())
50 return 0;
51
52 Node* ownerNode = sheet->ownerNode();
53 if (!isHTMLStyleElement(ownerNode))
54 return &document;
55
56 HTMLStyleElement& styleElement = toHTMLStyleElement(*ownerNode);
57 if (styleElement.isInShadowTree())
58 return styleElement.containingShadowRoot();
59 return &document;
60 }
61
parent() const62 ScopedStyleResolver* ScopedStyleResolver::parent() const
63 {
64 for (TreeScope* scope = treeScope().parentTreeScope(); scope; scope = scope->parentTreeScope()) {
65 if (ScopedStyleResolver* resolver = scope->scopedStyleResolver())
66 return resolver;
67 }
68 return 0;
69 }
70
addRulesFromSheet(CSSStyleSheet * cssSheet,const MediaQueryEvaluator & medium,StyleResolver * resolver)71 void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)
72 {
73 m_authorStyleSheets.append(cssSheet);
74 unsigned index = m_authorStyleSheets.size() - 1;
75 StyleSheetContents* sheet = cssSheet->contents();
76
77 AddRuleFlags addRuleFlags = resolver->document().securityOrigin()->canRequest(sheet->baseURL()) ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState;
78 const RuleSet& ruleSet = sheet->ensureRuleSet(medium, addRuleFlags);
79 resolver->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults());
80 resolver->processScopedRules(ruleSet, cssSheet, index, treeScope().rootNode());
81 }
82
collectFeaturesTo(RuleFeatureSet & features,HashSet<const StyleSheetContents * > & visitedSharedStyleSheetContents) const83 void ScopedStyleResolver::collectFeaturesTo(RuleFeatureSet& features, HashSet<const StyleSheetContents*>& visitedSharedStyleSheetContents) const
84 {
85 for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) {
86 StyleSheetContents* contents = m_authorStyleSheets[i]->contents();
87 if (contents->hasOneClient() || visitedSharedStyleSheetContents.add(contents).isNewEntry)
88 features.add(contents->ruleSet().features());
89 }
90 }
91
resetAuthorStyle()92 void ScopedStyleResolver::resetAuthorStyle()
93 {
94 m_authorStyleSheets.clear();
95 m_keyframesRuleMap.clear();
96 }
97
keyframeStylesForAnimation(const StringImpl * animationName)98 const StyleRuleKeyframes* ScopedStyleResolver::keyframeStylesForAnimation(const StringImpl* animationName)
99 {
100 if (m_keyframesRuleMap.isEmpty())
101 return 0;
102
103 KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(animationName);
104 if (it == m_keyframesRuleMap.end())
105 return 0;
106
107 return it->value.get();
108 }
109
addKeyframeStyle(PassRefPtrWillBeRawPtr<StyleRuleKeyframes> rule)110 void ScopedStyleResolver::addKeyframeStyle(PassRefPtrWillBeRawPtr<StyleRuleKeyframes> rule)
111 {
112 AtomicString s(rule->name());
113 if (rule->isVendorPrefixed()) {
114 KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(rule->name().impl());
115 if (it == m_keyframesRuleMap.end())
116 m_keyframesRuleMap.set(s.impl(), rule);
117 else if (it->value->isVendorPrefixed())
118 m_keyframesRuleMap.set(s.impl(), rule);
119 } else {
120 m_keyframesRuleMap.set(s.impl(), rule);
121 }
122 }
123
collectMatchingAuthorRules(ElementRuleCollector & collector,bool includeEmptyRules,CascadeScope cascadeScope,CascadeOrder cascadeOrder)124 void ScopedStyleResolver::collectMatchingAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules, CascadeScope cascadeScope, CascadeOrder cascadeOrder)
125 {
126 unsigned contextFlags = SelectorChecker::DefaultBehavior;
127
128 // FIXME: This is always true now.
129 contextFlags |= SelectorChecker::ScopeContainsLastMatchedElement;
130
131 RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
132 for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) {
133 MatchRequest matchRequest(&m_authorStyleSheets[i]->contents()->ruleSet(), includeEmptyRules, &m_scope->rootNode(), m_authorStyleSheets[i], i);
134 collector.collectMatchingRules(matchRequest, ruleRange, static_cast<SelectorChecker::ContextFlags>(contextFlags), cascadeScope, cascadeOrder);
135 }
136 }
137
matchPageRules(PageRuleCollector & collector)138 void ScopedStyleResolver::matchPageRules(PageRuleCollector& collector)
139 {
140 // Only consider the global author RuleSet for @page rules, as per the HTML5 spec.
141 ASSERT(m_scope->rootNode().isDocumentNode());
142 for (size_t i = 0; i < m_authorStyleSheets.size(); ++i)
143 collector.matchPageRules(&m_authorStyleSheets[i]->contents()->ruleSet());
144 }
145
collectViewportRulesTo(StyleResolver * resolver) const146 void ScopedStyleResolver::collectViewportRulesTo(StyleResolver* resolver) const
147 {
148 if (!m_scope->rootNode().isDocumentNode())
149 return;
150 for (size_t i = 0; i < m_authorStyleSheets.size(); ++i)
151 resolver->viewportStyleResolver()->collectViewportRules(&m_authorStyleSheets[i]->contents()->ruleSet(), ViewportStyleResolver::AuthorOrigin);
152 }
153
trace(Visitor * visitor)154 void ScopedStyleResolver::trace(Visitor* visitor)
155 {
156 #if ENABLE(OILPAN)
157 visitor->trace(m_scope);
158 visitor->trace(m_authorStyleSheets);
159 visitor->trace(m_keyframesRuleMap);
160 #endif
161 }
162
163 } // namespace blink
164