text: /*
   * Copyright (C) 2010 Google Inc. All Rights Reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef HTMLMetaCharsetParser_h
  #define HTMLMetaCharsetParser_h
  
  #include "core/html/parser/HTMLToken.h"
  #include "platform/text/SegmentedString.h"
  #include "wtf/Noncopyable.h"
  #include "wtf/PtrUtil.h"
  #include "wtf/text/TextCodec.h"
  #include "wtf/text/TextEncoding.h"
  #include <memory>
  
  namespace blink {
  
  class HTMLTokenizer;
  
  class HTMLMetaCharsetParser {
      WTF_MAKE_NONCOPYABLE(HTMLMetaCharsetParser); USING_FAST_MALLOC(HTMLMetaCharsetParser);
  public:
      static std::unique_ptr<HTMLMetaCharsetParser> create() { return wrapUnique(new HTMLMetaCharsetParser()); }
  
      ~HTMLMetaCharsetParser();
  
      // Returns true if done checking, regardless whether an encoding is found.
      bool checkForMetaCharset(const char*, size_t);
  
      const WTF::TextEncoding& encoding() { return m_encoding; }
  
  private:
      HTMLMetaCharsetParser();
  
      bool processMeta();
  
      std::unique_ptr<HTMLTokenizer> m_tokenizer;
      std::unique_ptr<TextCodec> m_assumedCodec;
      SegmentedString m_input;
      HTMLToken m_token;
      bool m_inHeadSection;
  
      bool m_doneChecking;
      WTF::TextEncoding m_encoding;
  };
  
  } // namespace blink
  #endif
  