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
18static const UChar CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
19
20U_NAMESPACE_BEGIN
21
22UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
23
24/**
25 * Factory method
26 */
27static 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 */
36void 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
44RemoveTransliterator::RemoveTransliterator() : Transliterator(::CURR_ID, 0) {}
45
46RemoveTransliterator::~RemoveTransliterator() {}
47
48Transliterator* 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
56void 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}
66U_NAMESPACE_END
67
68#endif /* #if !UCONFIG_NO_TRANSLITERATION */
69