149 lines
4.2 KiB
C++
149 lines
4.2 KiB
C++
/*
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*****************************************************************
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* Copyright (c) 2002, International Business Machines Corporation
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* and others. All Rights Reserved.
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*****************************************************************
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* $Source: /xsrl/Nsvn/icu/icu/source/i18n/anytrans.h,v $
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* $Revision: 1.4 $
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*****************************************************************
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* Date Name Description
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* 06/06/2002 aliu Creation.
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*****************************************************************
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*/
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#ifndef _ANYTRANS_H_
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#define _ANYTRANS_H_
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_TRANSLITERATION
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#include "unicode/translit.h"
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#include "unicode/uscript.h"
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#include "uhash.h"
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U_NAMESPACE_BEGIN
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/**
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* A transliterator named Any-T or Any-T/V, where T is the target
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* script and V is the optional variant, that uses multiple
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* transliterators, all going to T or T/V, all with script sources.
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* The target must be a script. It partitions text into runs of the
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* same script, and then based on the script of each run,
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* transliterates from that script to the given target or
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* target/variant. Adjacent COMMON or INHERITED script characters are
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* included in each run.
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*
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* @author Alan Liu
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*/
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class U_I18N_API AnyTransliterator : public Transliterator {
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/**
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* Cache mapping UScriptCode values to Transliterator*.
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*/
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UHashtable* cache;
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/**
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* The target or target/variant string.
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*/
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UnicodeString target;
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/**
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* The target script code. Never USCRIPT_INVALID_CODE.
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*/
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UScriptCode targetScript;
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/**
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* The address of this static class variable serves as this class's ID
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* for ICU "poor man's RTTI".
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*/
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static const char fgClassID;
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public:
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/**
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* Destructor.
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*/
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virtual ~AnyTransliterator();
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/**
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* Copy constructor.
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*/
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AnyTransliterator(const AnyTransliterator&);
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/**
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* Transliterator API.
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*/
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Transliterator* clone() const;
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/**
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* Implements {@link Transliterator#handleTransliterate}.
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*/
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virtual void handleTransliterate(Replaceable& text, UTransPosition& index,
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UBool incremental) const;
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @draft ICU 2.2
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*/
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virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @draft ICU 2.2
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*/
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static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
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private:
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/**
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* Private constructor
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* @param id the ID of the form S-T or S-T/V, where T is theTarget
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* and V is theVariant. Must not be empty.
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* @param theTarget the target name. Must not be empty, and must
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* name a script corresponding to theTargetScript.
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* @param theVariant the variant name, or the empty string if
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* there is no variant
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* @param theTargetScript the script code corresponding to
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* theTarget.
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* @param ec error code, fails if the internal hashtable cannot be
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* allocated
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*/
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AnyTransliterator(const UnicodeString& id,
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const UnicodeString& theTarget,
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const UnicodeString& theVariant,
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UScriptCode theTargetScript,
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UErrorCode& ec);
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/**
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* Returns a transliterator from the given source to our target or
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* target/variant. Returns NULL if the source is the same as our
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* target script, or if the source is USCRIPT_INVALID_CODE.
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* Caches the result and returns the same transliterator the next
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* time. The caller does NOT own the result and must not delete
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* it.
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*/
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Transliterator* getTransliterator(UScriptCode source) const;
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/**
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* Registers standard transliterators with the system. Called by
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* Transliterator during initialization.
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*/
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static void registerIDs();
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friend class Transliterator; // for registerIDs()
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/**
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* Return the script code for a given name, or
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* USCRIPT_INVALID_CODE if not found.
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*/
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static UScriptCode scriptNameToCode(const UnicodeString& name);
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};
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_TRANSLITERATION */
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#endif
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