1/*
2**********************************************************************
3*   Copyright (c) 2001-2011, 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(UnicodeString(TRUE, ::CURR_ID, -1),
39                                     RemoveTransliterator_create, integerToken(0));
40
41    Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("Remove"),
42                                            UNICODE_STRING_SIMPLE("Null"), FALSE);
43}
44
45RemoveTransliterator::RemoveTransliterator() : Transliterator(UnicodeString(TRUE, ::CURR_ID, -1), 0) {}
46
47RemoveTransliterator::~RemoveTransliterator() {}
48
49Transliterator* RemoveTransliterator::clone(void) const {
50    Transliterator* result = new RemoveTransliterator();
51    if (result != NULL && getFilter() != 0) {
52        result->adoptFilter((UnicodeFilter*)(getFilter()->clone()));
53    }
54    return result;
55}
56
57void RemoveTransliterator::handleTransliterate(Replaceable& text, UTransPosition& index,
58                                               UBool /*isIncremental*/) const {
59    // Our caller (filteredTransliterate) has already narrowed us
60    // to an unfiltered run.  Delete it.
61    UnicodeString empty;
62    text.handleReplaceBetween(index.start, index.limit, empty);
63    int32_t len = index.limit - index.start;
64    index.contextLimit -= len;
65    index.limit -= len;
66}
67U_NAMESPACE_END
68
69#endif /* #if !UCONFIG_NO_TRANSLITERATION */
70