third_party/WebKit/Source/core/html/parser/HTMLMetaCharsetParser.h

   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 #ifndef HTMLMetaCharsetParser_h
  27 #define HTMLMetaCharsetParser_h
  28
  29 #include "core/html/parser/HTMLToken.h"
  30 #include "platform/text/SegmentedString.h"
  31 #include "wtf/Noncopyable.h"
  32 #include "wtf/text/TextCodec.h"
  33 #include "wtf/text/TextEncoding.h"
  34
  35 namespace blink {
  36
  37 class HTMLTokenizer;
  38
  39 class HTMLMetaCharsetParser {
  40     WTF_MAKE_NONCOPYABLE(HTMLMetaCharsetParser); WTF_MAKE_FAST_ALLOCATED(HTMLMetaCharsetParser);
  41 public:
  42     static PassOwnPtr<HTMLMetaCharsetParser> create() { return adoptPtr(new HTMLMetaCharsetParser()); }
  43
  44     ~HTMLMetaCharsetParser();
  45
  46     // Returns true if done checking, regardless whether an encoding is found.
  47     bool checkForMetaCharset(const char*, size_t);
  48
  49     const WTF::TextEncoding& encoding() { return m_encoding; }
  50
  51 private:
  52     HTMLMetaCharsetParser();
  53
  54     bool processMeta();
  55
  56     OwnPtr<HTMLTokenizer> m_tokenizer;
  57     OwnPtr<TextCodec> m_assumedCodec;
  58     SegmentedString m_input;
  59     HTMLToken m_token;
  60     bool m_inHeadSection;
  61
  62     bool m_doneChecking;
  63     WTF::TextEncoding m_encoding;
  64 };
  65
  66 }
  67 #endif