source/samples/translit/unaccent.cpp

   1 /**********************************************************************
   2  * Copyright (C) 2016 and later: Unicode, Inc. and others.
   3  * License & terms of use: http://www.unicode.org/copyright.html#License
   4  **********************************************************************
   5  **********************************************************************
   6  * COPYRIGHT:
   7  * Copyright (c) 1999-2003, International Business Machines Corporation and
   8  * others. All Rights Reserved.
   9  **********************************************************************/
  10
  11 #include "unaccent.h"
  12
  13 const char UnaccentTransliterator::fgClassID = 0;
  14
  15 /**
  16  * Constructor
  17  */
  18 UnaccentTransliterator::UnaccentTransliterator() :
  19     normalizer("", UNORM_NFD),
  20     Transliterator("Unaccent", 0) {
  21 }
  22
  23 /**
  24  * Destructor
  25  */
  26 UnaccentTransliterator::~UnaccentTransliterator() {
  27 }
  28
  29 /**
  30  * Remove accents from a character using Normalizer.
  31  */
  32 UChar UnaccentTransliterator::unaccent(UChar c) const {
  33     UnicodeString str(c);
  34     UErrorCode status = U_ZERO_ERROR;
  35     UnaccentTransliterator* t = (UnaccentTransliterator*)this;
  36
  37     t->normalizer.setText(str, status);
  38     if (U_FAILURE(status)) {
  39         return c;
  40     }
  41     return (UChar) t->normalizer.next();
  42 }
  43
  44 /**
  45  * Implement Transliterator API
  46  */
  47 void UnaccentTransliterator::handleTransliterate(Replaceable& text,
  48                                                  UTransPosition& index,
  49                                                  UBool incremental) const {
  50     UnicodeString str("a");
  51     while (index.start < index.limit) {
  52         UChar c = text.charAt(index.start);
  53         UChar d = unaccent(c);
  54         if (c != d) {
  55             str.setCharAt(0, d);
  56             text.handleReplaceBetween(index.start, index.start+1, str);
  57         }
  58         index.start++;
  59     }
  60 }