michael@0: /*
michael@0: **********************************************************************
michael@0: *   Copyright (c) 2001-2011, International Business Machines
michael@0: *   Corporation and others.  All Rights Reserved.
michael@0: **********************************************************************
michael@0: *   Date        Name        Description
michael@0: *   04/02/2001  aliu        Creation.
michael@0: **********************************************************************
michael@0: */
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: 
michael@0: #if !UCONFIG_NO_TRANSLITERATION
michael@0: 
michael@0: #include "remtrans.h"
michael@0: #include "unicode/unifilt.h"
michael@0: 
michael@0: static const UChar CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
michael@0: 
michael@0: U_NAMESPACE_BEGIN
michael@0: 
michael@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
michael@0: 
michael@0: /**
michael@0:  * Factory method
michael@0:  */
michael@0: static Transliterator* RemoveTransliterator_create(const UnicodeString& /*ID*/,
michael@0:                                                    Transliterator::Token /*context*/) {
michael@0:     /* We don't need the ID or context. We just remove data */
michael@0:     return new RemoveTransliterator();
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * System registration hook.
michael@0:  */
michael@0: void RemoveTransliterator::registerIDs() {
michael@0: 
michael@0:     Transliterator::_registerFactory(UnicodeString(TRUE, ::CURR_ID, -1),
michael@0:                                      RemoveTransliterator_create, integerToken(0));
michael@0: 
michael@0:     Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("Remove"),
michael@0:                                             UNICODE_STRING_SIMPLE("Null"), FALSE);
michael@0: }
michael@0: 
michael@0: RemoveTransliterator::RemoveTransliterator() : Transliterator(UnicodeString(TRUE, ::CURR_ID, -1), 0) {}
michael@0: 
michael@0: RemoveTransliterator::~RemoveTransliterator() {}
michael@0: 
michael@0: Transliterator* RemoveTransliterator::clone(void) const {
michael@0:     Transliterator* result = new RemoveTransliterator();
michael@0:     if (result != NULL && getFilter() != 0) {
michael@0:         result->adoptFilter((UnicodeFilter*)(getFilter()->clone()));
michael@0:     }
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: void RemoveTransliterator::handleTransliterate(Replaceable& text, UTransPosition& index,
michael@0:                                                UBool /*isIncremental*/) const {
michael@0:     // Our caller (filteredTransliterate) has already narrowed us
michael@0:     // to an unfiltered run.  Delete it.
michael@0:     UnicodeString empty;
michael@0:     text.handleReplaceBetween(index.start, index.limit, empty);
michael@0:     int32_t len = index.limit - index.start;
michael@0:     index.contextLimit -= len;
michael@0:     index.limit -= len;
michael@0: }
michael@0: U_NAMESPACE_END
michael@0: 
michael@0: #endif /* #if !UCONFIG_NO_TRANSLITERATION */