CSSPreloadScanner.h revision 2daae5fd11344eaa88a0d92b0f6d65f8d2255c00 
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
33namespace WebCore {
34
35class Document;
36class HTMLToken;
37
38class CSSPreloadScanner {
39    WTF_MAKE_NONCOPYABLE(CSSPreloadScanner);
40public:
41    CSSPreloadScanner(Document*);
42
43    void reset();
44    void scan(const HTMLToken&, bool scanningBody);
45
46private:
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