icuSources/i18n/funcrepl.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 **********************************************************************
   5 *   Copyright (c) 2002-2011, International Business Machines Corporation
   6 *   and others.  All Rights Reserved.
   7 **********************************************************************
   8 *   Date        Name        Description
   9 *   02/04/2002  aliu        Creation.
  10 **********************************************************************
  11 */
  12
  13 #ifndef FUNCREPL_H
  14 #define FUNCREPL_H
  15
  16 #include "unicode/utypes.h"
  17
  18 #if !UCONFIG_NO_TRANSLITERATION
  19
  20 #include "unicode/unifunct.h"
  21 #include "unicode/unirepl.h"
  22
  23 U_NAMESPACE_BEGIN
  24
  25 class Transliterator;
  26
  27 /**
  28  * A replacer that calls a transliterator to generate its output text.
  29  * The input text to the transliterator is the output of another
  30  * UnicodeReplacer object.  That is, this replacer wraps another
  31  * replacer with a transliterator.
  32  *
  33  * @author Alan Liu
  34  */
  35 class FunctionReplacer : public UnicodeFunctor, public UnicodeReplacer {
  36
  37  private:
  38
  39     /**
  40      * The transliterator.  Must not be null.  OWNED.
  41      */
  42     Transliterator* translit;
  43
  44     /**
  45      * The replacer object.  This generates text that is then
  46      * processed by 'translit'.  Must not be null.  OWNED.
  47      */
  48     UnicodeFunctor* replacer;
  49
  50  public:
  51
  52     /**
  53      * Construct a replacer that takes the output of the given
  54      * replacer, passes it through the given transliterator, and emits
  55      * the result as output.
  56      */
  57     FunctionReplacer(Transliterator* adoptedTranslit,
  58                      UnicodeFunctor* adoptedReplacer);
  59
  60     /**
  61      * Copy constructor.
  62      */
  63     FunctionReplacer(const FunctionReplacer& other);
  64
  65     /**
  66      * Destructor
  67      */
  68     virtual ~FunctionReplacer();
  69
  70     /**
  71      * Implement UnicodeFunctor
  72      */
  73     virtual UnicodeFunctor* clone() const;
  74
  75     /**
  76      * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
  77      * and return the pointer.
  78      */
  79     virtual UnicodeReplacer* toReplacer() const;
  80
  81     /**
  82      * UnicodeReplacer API
  83      */
  84     virtual int32_t replace(Replaceable& text,
  85                             int32_t start,
  86                             int32_t limit,
  87                             int32_t& cursor);
  88
  89     /**
  90      * UnicodeReplacer API
  91      */
  92     virtual UnicodeString& toReplacerPattern(UnicodeString& rule,
  93                                              UBool escapeUnprintable) const;
  94
  95     /**
  96      * Implement UnicodeReplacer
  97      */
  98     virtual void addReplacementSetTo(UnicodeSet& toUnionTo) const;
  99
 100     /**
 101      * UnicodeFunctor API
 102      */
 103     virtual void setData(const TransliterationRuleData*);
 104
 105     /**
 106      * ICU "poor man's RTTI", returns a UClassID for the actual class.
 107      */
 108     virtual UClassID getDynamicClassID() const;
 109
 110     /**
 111      * ICU "poor man's RTTI", returns a UClassID for this class.
 112      */
 113     static UClassID U_EXPORT2 getStaticClassID();
 114 };
 115
 116 U_NAMESPACE_END
 117
 118 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
 119 #endif
 120
 121 //eof