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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (C) 1999-2011, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Date Name Description
* 11/17/99 aliu Creation.
**********************************************************************
*/
#ifndef CPDTRANS_H
#define CPDTRANS_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_TRANSLITERATION
#include "unicode/translit.h"
U_NAMESPACE_BEGIN
class U_COMMON_API UVector;
class TransliteratorRegistry;
/**
* A transliterator that is composed of two or more other
* transliterator objects linked together. For example, if one
* transliterator transliterates from script A to script B, and
* another transliterates from script B to script C, the two may be
* combined to form a new transliterator from A to C.
*
* <p>Composed transliterators may not behave as expected. For
* example, inverses may not combine to form the identity
* transliterator. See the class documentation for {@link
* Transliterator} for details.
*
* @author Alan Liu
*/
class U_I18N_API CompoundTransliterator : public Transliterator {
Transliterator** trans;
int32_t count;
int32_t numAnonymousRBTs;
public:
/**
* Constructs a new compound transliterator given an array of
* transliterators. The array of transliterators may be of any
* length, including zero or one, however, useful compound
* transliterators have at least two components.
* @param transliterators array of <code>Transliterator</code>
* objects
* @param transliteratorCount The number of
* <code>Transliterator</code> objects in transliterators.
* @param adoptedFilter the filter. Any character for which
* <tt>filter.contains()</tt> returns <tt>false</tt> will not be
* altered by this transliterator. If <tt>filter</tt> is
* <tt>null</tt> then no filtering is applied.
*/
CompoundTransliterator(Transliterator* const transliterators[],
int32_t transliteratorCount,
UnicodeFilter* adoptedFilter = nullptr);
/**
* Constructs a new compound transliterator.
* @param id compound ID
* @param dir either UTRANS_FORWARD or UTRANS_REVERSE
* @param adoptedFilter a global filter for this compound transliterator
* or nullptr
*/
CompoundTransliterator(const UnicodeString& id,
UTransDirection dir,
UnicodeFilter* adoptedFilter,
UParseError& parseError,
UErrorCode& status);
/**
* Constructs a new compound transliterator in the FORWARD
* direction with a nullptr filter.
*/
CompoundTransliterator(const UnicodeString& id,
UParseError& parseError,
UErrorCode& status);
/**
* Destructor.
*/
virtual ~CompoundTransliterator();
/**
* Copy constructor.
*/
CompoundTransliterator(const CompoundTransliterator&);
/**
* Transliterator API.
*/
virtual CompoundTransliterator* clone() const override;
/**
* Returns the number of transliterators in this chain.
* @return number of transliterators in this chain.
*/
virtual int32_t getCount() const;
/**
* Returns the transliterator at the given index in this chain.
* @param idx index into chain, from 0 to <code>getCount() - 1</code>
* @return transliterator at the given index
*/
virtual const Transliterator& getTransliterator(int32_t idx) const;
/**
* Sets the transliterators.
*/
void setTransliterators(Transliterator* const transliterators[],
int32_t count);
/**
* Adopts the transliterators.
*/
void adoptTransliterators(Transliterator* adoptedTransliterators[],
int32_t count);
/**
* Override Transliterator:
* Create a rule string that can be passed to createFromRules()
* to recreate this transliterator.
* @param result the string to receive the rules. Previous
* contents will be deleted.
* @param escapeUnprintable if true then convert unprintable
* character to their hex escape representations, \uxxxx or
* \Uxxxxxxxx. Unprintable characters are those other than
* U+000A, U+0020..U+007E.
*/
virtual UnicodeString& toRules(UnicodeString& result,
UBool escapeUnprintable) const override;
protected:
/**
* Implement Transliterator framework
*/
virtual void handleGetSourceSet(UnicodeSet& result) const override;
public:
/**
* Override Transliterator framework
*/
virtual UnicodeSet& getTargetSet(UnicodeSet& result) const override;
protected:
/**
* Implements {@link Transliterator#handleTransliterate}.
*/
virtual void handleTransliterate(Replaceable& text, UTransPosition& idx,
UBool incremental) const override;
public:
/**
* ICU "poor man's RTTI", returns a UClassID for the actual class.
*/
virtual UClassID getDynamicClassID() const override;
/**
* ICU "poor man's RTTI", returns a UClassID for this class.
*/
static UClassID U_EXPORT2 getStaticClassID();
/* @internal */
static const char16_t PASS_STRING[];
private:
friend class Transliterator;
friend class TransliteratorAlias; // to access private ct
/**
* Assignment operator.
*/
CompoundTransliterator& operator=(const CompoundTransliterator&);
/**
* Private constructor for Transliterator.
*/
CompoundTransliterator(const UnicodeString& ID,
UVector& list,
UnicodeFilter* adoptedFilter,
int32_t numAnonymousRBTs,
UParseError& parseError,
UErrorCode& status);
CompoundTransliterator(UVector& list,
UParseError& parseError,
UErrorCode& status);
CompoundTransliterator(UVector& list,
int32_t anonymousRBTs,
UParseError& parseError,
UErrorCode& status);
void init(const UnicodeString& id,
UTransDirection direction,
UBool fixReverseID,
UErrorCode& status);
void init(UVector& list,
UTransDirection direction,
UBool fixReverseID,
UErrorCode& status);
/**
* Return the IDs of the given list of transliterators, concatenated
* with ';' delimiting them. Equivalent to the perlish expression
* join(';', map($_.getID(), transliterators).
*/
UnicodeString joinIDs(Transliterator* const transliterators[],
int32_t transCount);
void freeTransliterators();
void computeMaximumContextLength();
};
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_TRANSLITERATION */
#endif
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