1/*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef StyleResolverStats_h
32#define StyleResolverStats_h
33
34#include "wtf/PassOwnPtr.h"
35#include "wtf/text/WTFString.h"
36
37namespace blink {
38
39class StyleResolverStats {
40public:
41    static PassOwnPtr<StyleResolverStats> create()
42    {
43        return adoptPtr(new StyleResolverStats);
44    }
45
46    void reset();
47    String report() const;
48
49    unsigned sharedStyleLookups;
50    unsigned sharedStyleCandidates;
51    unsigned sharedStyleFound;
52    unsigned sharedStyleMissed;
53    unsigned sharedStyleRejectedByUncommonAttributeRules;
54    unsigned sharedStyleRejectedBySiblingRules;
55    unsigned sharedStyleRejectedByParent;
56    unsigned matchedPropertyApply;
57    unsigned matchedPropertyCacheHit;
58    unsigned matchedPropertyCacheInheritedHit;
59    unsigned matchedPropertyCacheAdded;
60
61    // We keep a separate flag for this since crawling the entire document to print
62    // the number of missed candidates is very slow.
63    bool printMissedCandidateCount;
64
65private:
66    StyleResolverStats()
67        : printMissedCandidateCount(false)
68    {
69        reset();
70    }
71};
72
73#define INCREMENT_STYLE_STATS_COUNTER(resolver, counter) ((resolver).stats() && ++(resolver).stats()-> counter && (resolver).statsTotals()-> counter ++);
74
75} // namespace blink
76
77#endif // StyleResolverStats_h
78