1 /*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #ifndef CSSSelectorList_h
27 #define CSSSelectorList_h
28
29 #include "core/css/CSSSelector.h"
30
31 namespace WebCore {
32
33 class CSSParserSelector;
34
35 class CSSSelectorList {
36 WTF_MAKE_FAST_ALLOCATED;
37 public:
CSSSelectorList()38 CSSSelectorList() : m_selectorArray(0) { }
39 CSSSelectorList(const CSSSelectorList&);
40
41 ~CSSSelectorList();
42
43 void adopt(CSSSelectorList& list);
44 void adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector);
45
isValid()46 bool isValid() const { return !!m_selectorArray; }
first()47 const CSSSelector* first() const { return m_selectorArray; }
48 static const CSSSelector* next(const CSSSelector*);
hasOneSelector()49 bool hasOneSelector() const { return m_selectorArray && !next(m_selectorArray); }
selectorAt(size_t index)50 const CSSSelector* selectorAt(size_t index) const { return &m_selectorArray[index]; }
51
indexOfNextSelectorAfter(size_t index)52 size_t indexOfNextSelectorAfter(size_t index) const
53 {
54 const CSSSelector* current = selectorAt(index);
55 current = next(current);
56 if (!current)
57 return kNotFound;
58 return current - m_selectorArray;
59 }
60
61 bool selectorsNeedNamespaceResolution();
62
63 bool hasShadowDistributedAt(size_t index) const;
64 bool hasCombinatorCrossingTreeBoundaryAt(size_t index) const;
65
66 String selectorsText() const;
67
68 private:
69 unsigned length() const;
70 void deleteSelectors();
71
72 // Hide.
73 CSSSelectorList& operator=(const CSSSelectorList&);
74
75 // End of a multipart selector is indicated by m_isLastInTagHistory bit in the last item.
76 // End of the array is indicated by m_isLastInSelectorList bit in the last item.
77 CSSSelector* m_selectorArray;
78 };
79
next(const CSSSelector * current)80 inline const CSSSelector* CSSSelectorList::next(const CSSSelector* current)
81 {
82 // Skip subparts of compound selectors.
83 while (!current->isLastInTagHistory())
84 current++;
85 return current->isLastInSelectorList() ? 0 : current + 1;
86 }
87
88 } // namespace WebCore
89
90 #endif // CSSSelectorList_h
91