diff -r 000000000000 -r 4f2f89ce4247 WebCore/loader/TextResourceDecoder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/TextResourceDecoder.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,96 @@
+/*
+    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 "TextEncoding.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)
+    {
+        return adoptRef(new TextResourceDecoder(mimeType, defaultEncoding, usesEncodingDetector));
+    }
+    ~TextResourceDecoder();
+
+    void setEncoding(const TextEncoding&, EncodingSource);
+    const TextEncoding& encoding() const { return m_encoding; }
+
+    String decode(const char* data, size_t length);
+    String flush();
+
+    void setHintEncoding(const TextResourceDecoder* hintDecoder)
+    {
+        // hintEncoding is for use with autodetection, which should be 
+        // only invoked when hintEncoding comes from auto-detection.
+        if (hintDecoder && hintDecoder->m_source == AutoDetectedEncoding)
+            m_hintEncoding = hintDecoder->encoding().name();
+    }
+   
+    void useLenientXMLDecoding() { m_useLenientXMLDecoding = true; }
+    bool sawError() const { return m_sawError; }
+
+private:
+    TextResourceDecoder(const String& mimeType, const TextEncoding& defaultEncoding,
+                        bool usesEncodingDetector);
+
+    enum ContentType { PlainText, HTML, XML, CSS }; // PlainText only checks for BOM.
+    static ContentType determineContentType(const String& mimeType);
+    static const TextEncoding& defaultEncoding(ContentType, const TextEncoding& defaultEncoding);
+
+    size_t 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);
+    bool shouldAutoDetect() const;
+
+    ContentType m_contentType;
+    TextEncoding m_encoding;
+    OwnPtr<TextCodec> m_codec;
+    EncodingSource m_source;
+    const char* m_hintEncoding;
+    Vector<char> m_buffer;
+    bool m_checkedForBOM;
+    bool m_checkedForCSSCharset;
+    bool m_checkedForHeadCharset;
+    bool m_useLenientXMLDecoding; // Don't stop on XML decoding errors.
+    bool m_sawError;
+    bool m_usesEncodingDetector;
+};
+
+}
+
+#endif