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/*
Copyright (C) 1999 Lars Knoll (knoll@mpi-hd.mpg.de)
Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef TextResourceDecoder_h
#define TextResourceDecoder_h
#include "TextDecoder.h"
namespace WebCore {
class TextResourceDecoder : public RefCounted<TextResourceDecoder> {
public:
enum EncodingSource {
DefaultEncoding,
AutoDetectedEncoding,
EncodingFromXMLHeader,
EncodingFromMetaTag,
EncodingFromCSSCharset,
EncodingFromHTTPHeader,
UserChosenEncoding,
EncodingFromParentFrame
};
static PassRefPtr<TextResourceDecoder> create(const String& mimeType, const TextEncoding& defaultEncoding = TextEncoding(), bool usesEncodingDetector = false, const TextResourceDecoder* hintDecoder = NULL)
{
return adoptRef(new TextResourceDecoder(mimeType, defaultEncoding));
}
~TextResourceDecoder();
void setEncoding(const TextEncoding&, EncodingSource);
const TextEncoding& encoding() const { return m_decoder.encoding(); }
String decode(const char* data, size_t length);
String flush();
bool sawError() const { return m_sawError; }
EncodingSource source() const { return m_source; }
private:
TextResourceDecoder(const String& mimeType, const TextEncoding& defaultEncoding, bool usesEncodingDetector = false, const TextResourceDecoder* hintDecoder = NULL);
enum ContentType { PlainText, HTML, XML, CSS }; // PlainText is equivalent to directly using TextDecoder.
static ContentType determineContentType(const String& mimeType);
static const TextEncoding& defaultEncoding(ContentType, const TextEncoding& defaultEncoding);
void checkForBOM(const char*, size_t);
bool checkForCSSCharset(const char*, size_t, bool& movedDataToBuffer);
bool checkForHeadCharset(const char*, size_t, bool& movedDataToBuffer);
void detectJapaneseEncoding(const char*, size_t);
void detectEncoding(const char*, size_t);
ContentType m_contentType;
TextDecoder m_decoder;
const TextResourceDecoder* m_hintDecoder;
EncodingSource m_source;
Vector<char> m_buffer;
bool m_checkedForBOM;
bool m_checkedForCSSCharset;
bool m_checkedForHeadCharset;
bool m_sawError;
bool m_usesEncodingDetector;
};
}
#endif
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