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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
      3  * Copyright (C) 2010 Google Inc. All Rights Reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef CSSPreloadScanner_h
     28 #define CSSPreloadScanner_h
     29 
     30 #include "PlatformString.h"
     31 #include <wtf/Vector.h>
     32 
     33 namespace WebCore {
     34 
     35 class Document;
     36 class HTMLToken;
     37 
     38 class CSSPreloadScanner {
     39     WTF_MAKE_NONCOPYABLE(CSSPreloadScanner);
     40 public:
     41     CSSPreloadScanner(Document*);
     42 
     43     void reset();
     44     void scan(const HTMLToken&, bool scanningBody);
     45 
     46 private:
     47     enum State {
     48         Initial,
     49         MaybeComment,
     50         Comment,
     51         MaybeCommentEnd,
     52         RuleStart,
     53         Rule,
     54         AfterRule,
     55         RuleValue,
     56         AfterRuleValue,
     57         DoneParsingImportRules,
     58     };
     59 
     60     inline void tokenize(UChar c);
     61     void emitRule();
     62 
     63     State m_state;
     64     Vector<UChar, 16> m_rule;
     65     Vector<UChar> m_ruleValue;
     66 
     67     bool m_scanningBody;
     68     Document* m_document;
     69 };
     70 
     71 }
     72 
     73 #endif
     74