1 /*
2 **********************************************************************
3 * Copyright (c) 2002-2008, 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
19 static const UChar AMPERSAND = 38; // '&'
20 static const UChar OPEN[] = {40,32,0}; // "( "
21 static const UChar CLOSE[] = {32,41,0}; // " )"
22
23 U_NAMESPACE_BEGIN
24
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FunctionReplacer)25 UOBJECT_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 */
32 FunctionReplacer::FunctionReplacer(Transliterator* adoptedTranslit,
33 UnicodeFunctor* adoptedReplacer) {
34 translit = adoptedTranslit;
35 replacer = adoptedReplacer;
36 }
37
38 /**
39 * Copy constructor.
40 */
FunctionReplacer(const FunctionReplacer & other)41 FunctionReplacer::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 */
~FunctionReplacer()52 FunctionReplacer::~FunctionReplacer() {
53 delete translit;
54 delete replacer;
55 }
56
57 /**
58 * Implement UnicodeFunctor
59 */
clone() const60 UnicodeFunctor* 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 */
toReplacer() const68 UnicodeReplacer* FunctionReplacer::toReplacer() const {
69 return (UnicodeReplacer*) this;
70 }
71
72 /**
73 * UnicodeReplacer API
74 */
replace(Replaceable & text,int32_t start,int32_t limit,int32_t & cursor)75 int32_t FunctionReplacer::replace(Replaceable& text,
76 int32_t start,
77 int32_t limit,
78 int32_t& cursor)
79 {
80
81 // First delegate to subordinate replacer
82 int32_t len = replacer->toReplacer()->replace(text, start, limit, cursor);
83 limit = start + len;
84
85 // Now transliterate
86 limit = translit->transliterate(text, start, limit);
87
88 return limit - start;
89 }
90
91 /**
92 * UnicodeReplacer API
93 */
toReplacerPattern(UnicodeString & rule,UBool escapeUnprintable) const94 UnicodeString& FunctionReplacer::toReplacerPattern(UnicodeString& rule,
95 UBool escapeUnprintable) const {
96 UnicodeString str;
97 rule.truncate(0);
98 rule.append(AMPERSAND);
99 rule.append(translit->getID());
100 rule.append(OPEN);
101 rule.append(replacer->toReplacer()->toReplacerPattern(str, escapeUnprintable));
102 rule.append(CLOSE);
103 return rule;
104 }
105
106 /**
107 * Implement UnicodeReplacer
108 */
addReplacementSetTo(UnicodeSet & toUnionTo) const109 void FunctionReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
110 UnicodeSet set;
111 toUnionTo.addAll(translit->getTargetSet(set));
112 }
113
114 /**
115 * UnicodeFunctor API
116 */
setData(const TransliterationRuleData * d)117 void FunctionReplacer::setData(const TransliterationRuleData* d) {
118 replacer->setData(d);
119 }
120
121 U_NAMESPACE_END
122
123 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
124
125 //eof
126