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      1 /*
      2 **********************************************************************
      3 *   Copyright (c) 2001-2008, International Business Machines
      4 *   Corporation and others.  All Rights Reserved.
      5 **********************************************************************
      6 *   Date        Name        Description
      7 *   04/02/2001  aliu        Creation.
      8 **********************************************************************
      9 */
     10 
     11 #include "unicode/utypes.h"
     12 
     13 #if !UCONFIG_NO_TRANSLITERATION
     14 
     15 #include "remtrans.h"
     16 #include "unicode/unifilt.h"
     17 
     18 static const UChar CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
     19 
     20 U_NAMESPACE_BEGIN
     21 
     22 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
     23 
     24 /**
     25  * Factory method
     26  */
     27 static Transliterator* RemoveTransliterator_create(const UnicodeString& /*ID*/,
     28                                                    Transliterator::Token /*context*/) {
     29     /* We don't need the ID or context. We just remove data */
     30     return new RemoveTransliterator();
     31 }
     32 
     33 /**
     34  * System registration hook.
     35  */
     36 void RemoveTransliterator::registerIDs() {
     37 
     38     Transliterator::_registerFactory(::CURR_ID, RemoveTransliterator_create, integerToken(0));
     39 
     40     Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("Remove"),
     41                                             UNICODE_STRING_SIMPLE("Null"), FALSE);
     42 }
     43 
     44 RemoveTransliterator::RemoveTransliterator() : Transliterator(::CURR_ID, 0) {}
     45 
     46 RemoveTransliterator::~RemoveTransliterator() {}
     47 
     48 Transliterator* RemoveTransliterator::clone(void) const {
     49     Transliterator* result = new RemoveTransliterator();
     50     if (result != NULL && getFilter() != 0) {
     51         result->adoptFilter((UnicodeFilter*)(getFilter()->clone()));
     52     }
     53     return result;
     54 }
     55 
     56 void RemoveTransliterator::handleTransliterate(Replaceable& text, UTransPosition& index,
     57                                                UBool /*isIncremental*/) const {
     58     // Our caller (filteredTransliterate) has already narrowed us
     59     // to an unfiltered run.  Delete it.
     60     UnicodeString empty;
     61     text.handleReplaceBetween(index.start, index.limit, empty);
     62     int32_t len = index.limit - index.start;
     63     index.contextLimit -= len;
     64     index.limit -= len;
     65 }
     66 U_NAMESPACE_END
     67 
     68 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
     69