1// © 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
20static const char16_t CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
21
22U_NAMESPACE_BEGIN
23
24UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
25
26/**
27 * Factory method
28 */
29static 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 */
38void 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
47RemoveTransliterator::RemoveTransliterator() : Transliterator(UnicodeString(true, ::CURR_ID, -1), 0) {}
48
49RemoveTransliterator::~RemoveTransliterator() {}
50
51RemoveTransliterator* RemoveTransliterator::clone() const {
52    RemoveTransliterator* result = new RemoveTransliterator();
53    if (result != nullptr && getFilter() != 0) {
54        result->adoptFilter(getFilter()->clone());
55    }
56    return result;
57}
58
59void 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}
69U_NAMESPACE_END
70
71#endif /* #if !UCONFIG_NO_TRANSLITERATION */
72