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1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 **********************************************************************
5 *   Copyright (c) 2001-2011, International Business Machines
6 *   Corporation and others.  All Rights Reserved.
7 **********************************************************************
8 *   Date        Name        Description
9 *   04/02/2001  aliu        Creation.
10 **********************************************************************
11 */
12 
13 #include "unicode/utypes.h"
14 
15 #if !UCONFIG_NO_TRANSLITERATION
16 
17 #include "remtrans.h"
18 #include "unicode/unifilt.h"
19 
20 static const UChar CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
21 
22 U_NAMESPACE_BEGIN
23 
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)24 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
25 
26 /**
27  * Factory method
28  */
29 static Transliterator* RemoveTransliterator_create(const UnicodeString& /*ID*/,
30                                                    Transliterator::Token /*context*/) {
31     /* We don't need the ID or context. We just remove data */
32     return new RemoveTransliterator();
33 }
34 
35 /**
36  * System registration hook.
37  */
registerIDs()38 void RemoveTransliterator::registerIDs() {
39 
40     Transliterator::_registerFactory(UnicodeString(TRUE, ::CURR_ID, -1),
41                                      RemoveTransliterator_create, integerToken(0));
42 
43     Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("Remove"),
44                                             UNICODE_STRING_SIMPLE("Null"), FALSE);
45 }
46 
RemoveTransliterator()47 RemoveTransliterator::RemoveTransliterator() : Transliterator(UnicodeString(TRUE, ::CURR_ID, -1), 0) {}
48 
~RemoveTransliterator()49 RemoveTransliterator::~RemoveTransliterator() {}
50 
clone(void) const51 Transliterator* RemoveTransliterator::clone(void) const {
52     Transliterator* result = new RemoveTransliterator();
53     if (result != NULL && getFilter() != 0) {
54         result->adoptFilter((UnicodeFilter*)(getFilter()->clone()));
55     }
56     return result;
57 }
58 
handleTransliterate(Replaceable & text,UTransPosition & index,UBool) const59 void RemoveTransliterator::handleTransliterate(Replaceable& text, UTransPosition& index,
60                                                UBool /*isIncremental*/) const {
61     // Our caller (filteredTransliterate) has already narrowed us
62     // to an unfiltered run.  Delete it.
63     UnicodeString empty;
64     text.handleReplaceBetween(index.start, index.limit, empty);
65     int32_t len = index.limit - index.start;
66     index.contextLimit -= len;
67     index.limit -= len;
68 }
69 U_NAMESPACE_END
70 
71 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
72