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      1 //  2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 **********************************************************************
      5 *   Copyright (c) 2002-2012, 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 #include "unicode/utypes.h"
     14 
     15 #if !UCONFIG_NO_TRANSLITERATION
     16 
     17 #include "unicode/translit.h"
     18 #include "unicode/uniset.h"
     19 #include "funcrepl.h"
     20 
     21 static const UChar AMPERSAND = 38; // '&'
     22 static const UChar OPEN[]    = {40,32,0}; // "( "
     23 static const UChar CLOSE[]   = {32,41,0}; // " )"
     24 
     25 U_NAMESPACE_BEGIN
     26 
     27 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FunctionReplacer)
     28 
     29 /**
     30  * Construct a replacer that takes the output of the given
     31  * replacer, passes it through the given transliterator, and emits
     32  * the result as output.
     33  */
     34 FunctionReplacer::FunctionReplacer(Transliterator* adoptedTranslit,
     35                                    UnicodeFunctor* adoptedReplacer) {
     36     translit = adoptedTranslit;
     37     replacer = adoptedReplacer;
     38 }
     39 
     40 /**
     41  * Copy constructor.
     42  */
     43 FunctionReplacer::FunctionReplacer(const FunctionReplacer& other) :
     44     UnicodeFunctor(other),
     45     UnicodeReplacer(other)
     46 {
     47     translit = other.translit->clone();
     48     replacer = other.replacer->clone();
     49 }
     50 
     51 /**
     52  * Destructor
     53  */
     54 FunctionReplacer::~FunctionReplacer() {
     55     delete translit;
     56     delete replacer;
     57 }
     58 
     59 /**
     60  * Implement UnicodeFunctor
     61  */
     62 UnicodeFunctor* FunctionReplacer::clone() const {
     63     return new FunctionReplacer(*this);
     64 }
     65 
     66 /**
     67  * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
     68  * and return the pointer.
     69  */
     70 UnicodeReplacer* FunctionReplacer::toReplacer() const {
     71   FunctionReplacer  *nonconst_this = const_cast<FunctionReplacer *>(this);
     72   UnicodeReplacer *nonconst_base = static_cast<UnicodeReplacer *>(nonconst_this);
     73 
     74   return nonconst_base;
     75 }
     76 
     77 /**
     78  * UnicodeReplacer API
     79  */
     80 int32_t FunctionReplacer::replace(Replaceable& text,
     81                                   int32_t start,
     82                                   int32_t limit,
     83                                   int32_t& cursor)
     84 {
     85 
     86     // First delegate to subordinate replacer
     87     int32_t len = replacer->toReplacer()->replace(text, start, limit, cursor);
     88     limit = start + len;
     89 
     90     // Now transliterate
     91     limit = translit->transliterate(text, start, limit);
     92 
     93     return limit - start;
     94 }
     95 
     96 /**
     97  * UnicodeReplacer API
     98  */
     99 UnicodeString& FunctionReplacer::toReplacerPattern(UnicodeString& rule,
    100                                                    UBool escapeUnprintable) const {
    101     UnicodeString str;
    102     rule.truncate(0);
    103     rule.append(AMPERSAND);
    104     rule.append(translit->getID());
    105     rule.append(OPEN, 2);
    106     rule.append(replacer->toReplacer()->toReplacerPattern(str, escapeUnprintable));
    107     rule.append(CLOSE, 2);
    108     return rule;
    109 }
    110 
    111 /**
    112  * Implement UnicodeReplacer
    113  */
    114 void FunctionReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
    115     UnicodeSet set;
    116     toUnionTo.addAll(translit->getTargetSet(set));
    117 }
    118 
    119 /**
    120  * UnicodeFunctor API
    121  */
    122 void FunctionReplacer::setData(const TransliterationRuleData* d) {
    123     replacer->setData(d);
    124 }
    125 
    126 U_NAMESPACE_END
    127 
    128 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
    129 
    130 //eof
    131