icuSources/samples/translit/answers/unaccent.cpp

   1 /********************************************************************
   2  * COPYRIGHT:
   3  * Copyright (c) 1999-2002, International Business Machines Corporation and
   4  * others. All Rights Reserved.
   5  ********************************************************************/
   6
   7 #include "unaccent.h"
   8
   9 /**
  10  * Constructor
  11  */
  12 UnaccentTransliterator::UnaccentTransliterator() :
  13     normalizer("", Normalizer::DECOMP),
  14     Transliterator("Unaccent", 0) {
  15 }
  16
  17 /**
  18  * Destructor
  19  */
  20 UnaccentTransliterator::~UnaccentTransliterator() {
  21 }
  22
  23 /**
  24  * Remove accents from a character using Normalizer.
  25  */
  26 UChar UnaccentTransliterator::unaccent(UChar c) const {
  27     UnicodeString str(c);
  28     UErrorCode status = U_ZERO_ERROR;
  29     UnaccentTransliterator* t = (UnaccentTransliterator*)this;
  30
  31     t->normalizer.setText(str, status);
  32     if (U_FAILURE(status)) {
  33         return c;
  34     }
  35     return (UChar) t->normalizer.next();
  36 }
  37
  38 /**
  39  * Implement Transliterator API
  40  */
  41 void UnaccentTransliterator::handleTransliterate(Replaceable& text,
  42                                                  UTransPosition& index,
  43                                                  UBool incremental) const {
  44     UnicodeString str("a");
  45     while (index.start < index.limit) {
  46         UChar c = text.charAt(index.start);
  47         UChar d = unaccent(c);
  48         if (c != d) {
  49             str.setCharAt(0, d);
  50             text.handleReplaceBetween(index.start, index.start+1, str);
  51         }
  52         index.start++;
  53     }
  54 }