1 /*
2 * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "config.h"
22 #include "core/css/parser/CSSParserValues.h"
23
24 #include "core/css/CSSFunctionValue.h"
25 #include "core/css/CSSSelectorList.h"
26 #include "core/html/parser/HTMLParserIdioms.h"
27
28 namespace blink {
29
30 using namespace WTF;
31
destroy(Vector<CSSParserValue,4> & values)32 static void destroy(Vector<CSSParserValue, 4>& values)
33 {
34 size_t numValues = values.size();
35 for (size_t i = 0; i < numValues; i++) {
36 if (values[i].unit == CSSParserValue::Function)
37 delete values[i].function;
38 else if (values[i].unit == CSSParserValue::ValueList)
39 delete values[i].valueList;
40 }
41 }
42
destroyAndClear()43 void CSSParserValueList::destroyAndClear()
44 {
45 destroy(m_values);
46 clearAndLeakValues();
47 }
48
~CSSParserValueList()49 CSSParserValueList::~CSSParserValueList()
50 {
51 destroy(m_values);
52 }
53
addValue(const CSSParserValue & v)54 void CSSParserValueList::addValue(const CSSParserValue& v)
55 {
56 m_values.append(v);
57 }
58
insertValueAt(unsigned i,const CSSParserValue & v)59 void CSSParserValueList::insertValueAt(unsigned i, const CSSParserValue& v)
60 {
61 m_values.insert(i, v);
62 }
63
stealValues(CSSParserValueList & valueList)64 void CSSParserValueList::stealValues(CSSParserValueList& valueList)
65 {
66 for (unsigned i = 0; i < valueList.size(); ++i)
67 m_values.append(*(valueList.valueAt(i)));
68 valueList.clearAndLeakValues();
69 }
70
CSSParserSelector()71 CSSParserSelector::CSSParserSelector()
72 : m_selector(adoptPtr(new CSSSelector()))
73 {
74 }
75
CSSParserSelector(const QualifiedName & tagQName)76 CSSParserSelector::CSSParserSelector(const QualifiedName& tagQName)
77 : m_selector(adoptPtr(new CSSSelector(tagQName)))
78 {
79 }
80
~CSSParserSelector()81 CSSParserSelector::~CSSParserSelector()
82 {
83 if (!m_tagHistory)
84 return;
85 Vector<OwnPtr<CSSParserSelector>, 16> toDelete;
86 OwnPtr<CSSParserSelector> selector = m_tagHistory.release();
87 while (true) {
88 OwnPtr<CSSParserSelector> next = selector->m_tagHistory.release();
89 toDelete.append(selector.release());
90 if (!next)
91 break;
92 selector = next.release();
93 }
94 }
95
adoptSelectorVector(Vector<OwnPtr<CSSParserSelector>> & selectorVector)96 void CSSParserSelector::adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector)
97 {
98 CSSSelectorList* selectorList = new CSSSelectorList();
99 selectorList->adoptSelectorVector(selectorVector);
100 m_selector->setSelectorList(adoptPtr(selectorList));
101 }
102
isSimple() const103 bool CSSParserSelector::isSimple() const
104 {
105 if (m_selector->selectorList() || m_selector->matchesPseudoElement())
106 return false;
107
108 if (!m_tagHistory)
109 return true;
110
111 if (m_selector->match() == CSSSelector::Tag) {
112 // We can't check against anyQName() here because namespace may not be nullAtom.
113 // Example:
114 // @namespace "http://www.w3.org/2000/svg";
115 // svg:not(:root) { ...
116 if (m_selector->tagQName().localName() == starAtom)
117 return m_tagHistory->isSimple();
118 }
119
120 return false;
121 }
122
insertTagHistory(CSSSelector::Relation before,PassOwnPtr<CSSParserSelector> selector,CSSSelector::Relation after)123 void CSSParserSelector::insertTagHistory(CSSSelector::Relation before, PassOwnPtr<CSSParserSelector> selector, CSSSelector::Relation after)
124 {
125 if (m_tagHistory)
126 selector->setTagHistory(m_tagHistory.release());
127 setRelation(before);
128 selector->setRelation(after);
129 m_tagHistory = selector;
130 }
131
appendTagHistory(CSSSelector::Relation relation,PassOwnPtr<CSSParserSelector> selector)132 void CSSParserSelector::appendTagHistory(CSSSelector::Relation relation, PassOwnPtr<CSSParserSelector> selector)
133 {
134 CSSParserSelector* end = this;
135 while (end->tagHistory())
136 end = end->tagHistory();
137 end->setRelation(relation);
138 end->setTagHistory(selector);
139 }
140
prependTagSelector(const QualifiedName & tagQName,bool tagIsForNamespaceRule)141 void CSSParserSelector::prependTagSelector(const QualifiedName& tagQName, bool tagIsForNamespaceRule)
142 {
143 OwnPtr<CSSParserSelector> second = adoptPtr(new CSSParserSelector);
144 second->m_selector = m_selector.release();
145 second->m_tagHistory = m_tagHistory.release();
146 m_tagHistory = second.release();
147
148 m_selector = adoptPtr(new CSSSelector(tagQName, tagIsForNamespaceRule));
149 m_selector->setRelation(CSSSelector::SubSelector);
150 }
151
hasHostPseudoSelector() const152 bool CSSParserSelector::hasHostPseudoSelector() const
153 {
154 for (CSSParserSelector* selector = const_cast<CSSParserSelector*>(this); selector; selector = selector->tagHistory()) {
155 if (selector->pseudoType() == CSSSelector::PseudoHost || selector->pseudoType() == CSSSelector::PseudoHostContext)
156 return true;
157 }
158 return false;
159 }
160
161 } // namespace blink
162