1/*
2 * Copyright (C) 2008, 2013 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#pragma once
28
29#include "HTMLResourcePreloader.h"
30#include "HTMLToken.h"
31#include <wtf/Vector.h>
32
33namespace WebCore {
34
35class CSSPreloadScanner {
36 WTF_MAKE_NONCOPYABLE(CSSPreloadScanner);
37public:
38 CSSPreloadScanner();
39 ~CSSPreloadScanner();
40
41 void reset();
42
43 void scan(const HTMLToken::DataVector&, PreloadRequestStream&);
44
45private:
46 enum State {
47 Initial,
48 MaybeComment,
49 Comment,
50 MaybeCommentEnd,
51 RuleStart,
52 Rule,
53 AfterRule,
54 RuleValue,
55 AfterRuleValue,
56 DoneParsingImportRules,
57 };
58
59 inline void tokenize(UChar);
60 void emitRule();
61
62 State m_state;
63 Vector<UChar> m_rule;
64 Vector<UChar> m_ruleValue;
65
66 // Only non-zero during scan()
67 PreloadRequestStream* m_requests;
68};
69
70} // namespace WebCore
71