/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 */

#ifndef StyleResolverStats_h
#define StyleResolverStats_h

#include "wtf/PassOwnPtr.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

class StyleResolverStats {
public:
    static PassOwnPtr<StyleResolverStats> create()
    {
        return adoptPtr(new StyleResolverStats);
    }

    void reset();
    String report() const;

    unsigned sharedStyleLookups;
    unsigned sharedStyleCandidates;
    unsigned sharedStyleFound;
    unsigned sharedStyleMissed;
    unsigned sharedStyleRejectedByUncommonAttributeRules;
    unsigned sharedStyleRejectedBySiblingRules;
    unsigned sharedStyleRejectedByParent;
    unsigned matchedPropertyApply;
    unsigned matchedPropertyCacheHit;
    unsigned matchedPropertyCacheInheritedHit;
    unsigned matchedPropertyCacheAdded;

    // We keep a separate flag for this since crawling the entire document to print
    // the number of missed candidates is very slow.
    bool printMissedCandidateCount;

private:
    StyleResolverStats()
        : printMissedCandidateCount(false)
    {
        reset();
    }
};

#define INCREMENT_STYLE_STATS_COUNTER(resolver, counter) ((resolver).stats() && ++(resolver).stats()-> counter && (resolver).statsTotals()-> counter ++);

} // namespace WebCore

#endif // StyleResolverStats_h