1/*
2**********************************************************************
3*   Copyright (c) 2002-2012, International Business Machines Corporation
4*   and others.  All Rights Reserved.
5**********************************************************************
6*   Date        Name        Description
7*   02/04/2002  aliu        Creation.
8**********************************************************************
9*/
10
11#include "unicode/utypes.h"
12
13#if !UCONFIG_NO_TRANSLITERATION
14
15#include "unicode/translit.h"
16#include "unicode/uniset.h"
17#include "funcrepl.h"
18
19static const UChar AMPERSAND = 38; // '&'
20static const UChar OPEN[]    = {40,32,0}; // "( "
21static const UChar CLOSE[]   = {32,41,0}; // " )"
22
23U_NAMESPACE_BEGIN
24
25UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FunctionReplacer)
26
27/**
28 * Construct a replacer that takes the output of the given
29 * replacer, passes it through the given transliterator, and emits
30 * the result as output.
31 */
32FunctionReplacer::FunctionReplacer(Transliterator* adoptedTranslit,
33                                   UnicodeFunctor* adoptedReplacer) {
34    translit = adoptedTranslit;
35    replacer = adoptedReplacer;
36}
37
38/**
39 * Copy constructor.
40 */
41FunctionReplacer::FunctionReplacer(const FunctionReplacer& other) :
42    UnicodeFunctor(other),
43    UnicodeReplacer(other)
44{
45    translit = other.translit->clone();
46    replacer = other.replacer->clone();
47}
48
49/**
50 * Destructor
51 */
52FunctionReplacer::~FunctionReplacer() {
53    delete translit;
54    delete replacer;
55}
56
57/**
58 * Implement UnicodeFunctor
59 */
60UnicodeFunctor* FunctionReplacer::clone() const {
61    return new FunctionReplacer(*this);
62}
63
64/**
65 * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
66 * and return the pointer.
67 */
68UnicodeReplacer* FunctionReplacer::toReplacer() const {
69  FunctionReplacer  *nonconst_this = const_cast<FunctionReplacer *>(this);
70  UnicodeReplacer *nonconst_base = static_cast<UnicodeReplacer *>(nonconst_this);
71
72  return nonconst_base;
73}
74
75/**
76 * UnicodeReplacer API
77 */
78int32_t FunctionReplacer::replace(Replaceable& text,
79                                  int32_t start,
80                                  int32_t limit,
81                                  int32_t& cursor)
82{
83
84    // First delegate to subordinate replacer
85    int32_t len = replacer->toReplacer()->replace(text, start, limit, cursor);
86    limit = start + len;
87
88    // Now transliterate
89    limit = translit->transliterate(text, start, limit);
90
91    return limit - start;
92}
93
94/**
95 * UnicodeReplacer API
96 */
97UnicodeString& FunctionReplacer::toReplacerPattern(UnicodeString& rule,
98                                                   UBool escapeUnprintable) const {
99    UnicodeString str;
100    rule.truncate(0);
101    rule.append(AMPERSAND);
102    rule.append(translit->getID());
103    rule.append(OPEN, 2);
104    rule.append(replacer->toReplacer()->toReplacerPattern(str, escapeUnprintable));
105    rule.append(CLOSE, 2);
106    return rule;
107}
108
109/**
110 * Implement UnicodeReplacer
111 */
112void FunctionReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
113    UnicodeSet set;
114    toUnionTo.addAll(translit->getTargetSet(set));
115}
116
117/**
118 * UnicodeFunctor API
119 */
120void FunctionReplacer::setData(const TransliterationRuleData* d) {
121    replacer->setData(d);
122}
123
124U_NAMESPACE_END
125
126#endif /* #if !UCONFIG_NO_TRANSLITERATION */
127
128//eof
129