1/*
2 * Copyright (C) 2010 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "HTMLTokenizer.h"
29#include "SegmentedString.h"
30#include "TextEncoding.h"
31
32namespace WebCore {
33
34class TextCodec;
35
36class HTMLMetaCharsetParser {
37 WTF_MAKE_NONCOPYABLE(HTMLMetaCharsetParser); WTF_MAKE_FAST_ALLOCATED;
38public:
39 HTMLMetaCharsetParser();
40
41 // Returns true if done checking, regardless whether an encoding is found.
42 bool checkForMetaCharset(const char*, size_t);
43
44 const TextEncoding& encoding() { return m_encoding; }
45
46 // The returned encoding might not be valid.
47 typedef Vector<std::pair<String, String>> AttributeList;
48 static TextEncoding encodingFromMetaAttributes(const AttributeList&);
49
50private:
51 bool processMeta(HTMLToken&);
52
53 HTMLTokenizer m_tokenizer;
54 const std::unique_ptr<TextCodec> m_codec;
55 SegmentedString m_input;
56 bool m_inHeadSection { true };
57 bool m_doneChecking { false };
58 TextEncoding m_encoding;
59};
60
61} // namespace WebCore
62