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/*
* 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.
*/
#pragma once
#include "HTMLTokenizer.h"
#include "SegmentedString.h"
#include <pal/text/TextEncoding.h>
#include <wtf/TZoneMalloc.h>
namespace PAL {
class TextCodec;
}
namespace WebCore {
class HTMLMetaCharsetParser {
WTF_MAKE_TZONE_ALLOCATED(HTMLMetaCharsetParser);
WTF_MAKE_NONCOPYABLE(HTMLMetaCharsetParser);
public:
HTMLMetaCharsetParser();
// Returns true if done checking, regardless whether an encoding is found.
bool checkForMetaCharset(std::span<const uint8_t>);
const PAL::TextEncoding& encoding() { return m_encoding; }
// The returned encoding might not be valid.
static PAL::TextEncoding encodingFromMetaAttributes(std::span<const std::pair<StringView, StringView>>);
private:
bool processMeta(HTMLToken&);
HTMLTokenizer m_tokenizer;
const std::unique_ptr<PAL::TextCodec> m_codec;
SegmentedString m_input;
bool m_inHeadSection { true };
bool m_doneChecking { false };
PAL::TextEncoding m_encoding;
};
} // namespace WebCore
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