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      1 /********************************************************************
      2  * COPYRIGHT:
      3  * Copyright (c) 1999-2003, International Business Machines Corporation and
      4  * others. All Rights Reserved.
      5  ********************************************************************/
      6 
      7 #include "unaccent.h"
      8 
      9 const char UnaccentTransliterator::fgClassID = 0;
     10 
     11 /**
     12  * Constructor
     13  */
     14 UnaccentTransliterator::UnaccentTransliterator() :
     15     normalizer("", UNORM_NFD),
     16     Transliterator("Unaccent", 0) {
     17 }
     18 
     19 /**
     20  * Destructor
     21  */
     22 UnaccentTransliterator::~UnaccentTransliterator() {
     23 }
     24 
     25 /**
     26  * Remove accents from a character using Normalizer.
     27  */
     28 UChar UnaccentTransliterator::unaccent(UChar c) const {
     29     UnicodeString str(c);
     30     UErrorCode status = U_ZERO_ERROR;
     31     UnaccentTransliterator* t = (UnaccentTransliterator*)this;
     32 
     33     t->normalizer.setText(str, status);
     34     if (U_FAILURE(status)) {
     35         return c;
     36     }
     37     return (UChar) t->normalizer.next();
     38 }
     39 
     40 /**
     41  * Implement Transliterator API
     42  */
     43 void UnaccentTransliterator::handleTransliterate(Replaceable& text,
     44                                                  UTransPosition& index,
     45                                                  UBool incremental) const {
     46     UnicodeString str("a");
     47     while (index.start < index.limit) {
     48         UChar c = text.charAt(index.start);
     49         UChar d = unaccent(c);
     50         if (c != d) {
     51             str.setCharAt(0, d);
     52             text.handleReplaceBetween(index.start, index.start+1, str);
     53         }
     54         index.start++;
     55     }
     56 }
     57