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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit460c52653ab0dcca6f19a4f492ed2c5e4e963ab0 (patch)
tree67208f7c145782a7e90b123b982ca78d88cc2c87 /kmail/encodingdetector.h
downloadtdepim-460c52653ab0dcca6f19a4f492ed2c5e4e963ab0.tar.gz
tdepim-460c52653ab0dcca6f19a4f492ed2c5e4e963ab0.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+/*
+ This file was taken from the KDE 4.x libraries and backported to Qt 3.
+
+ Copyright (C) 1999 Lars Knoll (knoll@mpi-hd.mpg.de)
+ Copyright (C) 2007 Nick Shaforostoff (shafff@ukr.net)
+
+ 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 ENCODINGDETECTOR_H
+#define ENCODINGDETECTOR_H
+
+#include <qstring.h>
+
+class QTextCodec;
+class QTextDecoder;
+class EncodingDetectorPrivate;
+
+/**
+ * @short Provides encoding detection capabilities.
+ *
+ * Searches for encoding declaration inside raw data -- meta and xml tags.
+ * In the case it can't find it, uses heuristics for specified language.
+ *
+ * If it finds unicode BOM marks, it changes encoding regardless of what the user has told
+ *
+ * Intended lifetime of the object: one instance per document.
+ *
+ * Typical use:
+ * \code
+ * QByteArray data;
+ * ...
+ * EncodingDetector detector;
+ * detector.setAutoDetectLanguage(EncodingDetector::Cyrillic);
+ * QString out=detector.decode(data);
+ * \endcode
+ *
+ *
+ * Do not mix decode() with decodeWithBuffering()
+ *
+ * @short Guess encoding of char array
+ *
+ */
+class EncodingDetector
+{
+public:
+ enum EncodingChoiceSource
+ {
+ DefaultEncoding,
+ AutoDetectedEncoding,
+ BOM,
+ EncodingFromXMLHeader,
+ EncodingFromMetaTag,
+ EncodingFromHTTPHeader,
+ UserChosenEncoding
+ };
+
+ enum AutoDetectScript
+ {
+ None,
+ SemiautomaticDetection,
+ Arabic,
+ Baltic,
+ CentralEuropean,
+ ChineseSimplified,
+ ChineseTraditional,
+ Cyrillic,
+ Greek,
+ Hebrew,
+ Japanese,
+ Korean,
+ NorthernSaami,
+ SouthEasternEurope,
+ Thai,
+ Turkish,
+ Unicode,
+ WesternEuropean
+ };
+
+ /**
+ * Default codec is latin1 (as html spec says), EncodingChoiceSource is default, AutoDetectScript=Semiautomatic
+ */
+ EncodingDetector();
+
+ /**
+ * Allows to set Default codec, EncodingChoiceSource, AutoDetectScript
+ */
+ EncodingDetector(QTextCodec* codec, EncodingChoiceSource source, AutoDetectScript script=None);
+ ~EncodingDetector();
+
+ //const QTextCodec* codec() const;
+
+ /**
+ * @returns true if specified encoding was recognized
+ */
+ bool setEncoding(const char *encoding, EncodingChoiceSource type);
+
+ /**
+ * Convenience method.
+ * @returns mime name of detected encoding
+ */
+ const char* encoding() const;
+
+ bool visuallyOrdered() const;
+
+// void setAutoDetectLanguage( const QString& );
+// const QString& autoDetectLanguage() const;
+
+ void setAutoDetectLanguage( AutoDetectScript );
+ AutoDetectScript autoDetectLanguage() const;
+
+ EncodingChoiceSource encodingChoiceSource() const;
+
+ /**
+ * Analyze text data.
+ * @returns true if there was enough data for accurate detection
+ */
+ bool analyze( const char *data, int len );
+
+ /**
+ * Analyze text data.
+ * @returns true if there was enough data for accurate detection
+ */
+ bool analyze( const QByteArray &data );
+
+ /**
+ * Takes lang name _after_ it were i18n()'ed
+ */
+ static AutoDetectScript scriptForName(const QString& lang);
+ static QString nameForScript(AutoDetectScript);
+ static AutoDetectScript scriptForLanguageCode(const QString &lang);
+ static bool hasAutoDetectionForScript(AutoDetectScript);
+
+protected:
+ /**
+ * Check if we are really utf8. Taken from kate
+ *
+ * @returns true if current encoding is utf8 and the text cannot be in this encoding
+ *
+ * Please somebody read http://de.wikipedia.org/wiki/UTF-8 and check this code...
+ */
+ bool errorsIfUtf8 (const char* data, int length);
+
+ /**
+ * @returns QTextDecoder for detected encoding
+ */
+ QTextDecoder* decoder();
+
+private:
+ EncodingDetectorPrivate* const d;
+};
+
+#endif