1/*
2 * Copyright (C) 2012 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 COMPUTER, 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 COMPUTER, 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 StyleInvalidationAnalysis_h
27#define StyleInvalidationAnalysis_h
28
29#include <wtf/HashSet.h>
30#include <wtf/PassOwnPtr.h>
31#include <wtf/text/AtomicStringImpl.h>
32
33namespace WebCore {
34
35class Document;
36class StyleSheetContents;
37
38class StyleInvalidationAnalysis {
39public:
40    StyleInvalidationAnalysis(const Vector<StyleSheetContents*>&);
41
42    bool dirtiesAllStyle() const { return m_dirtiesAllStyle; }
43    void invalidateStyle(Document*);
44
45private:
46
47    void analyzeStyleSheet(StyleSheetContents*);
48
49    bool m_dirtiesAllStyle;
50    HashSet<AtomicStringImpl*> m_idScopes;
51    HashSet<AtomicStringImpl*> m_classScopes;
52};
53
54}
55
56#endif
57