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
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 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 */
replace(Replaceable & text,int32_t start,int32_t limit,int32_t & cursor)78 int32_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 */
toReplacerPattern(UnicodeString & rule,UBool escapeUnprintable) const97 UnicodeString& 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 */
addReplacementSetTo(UnicodeSet & toUnionTo) const112 void FunctionReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
113 UnicodeSet set;
114 toUnionTo.addAll(translit->getTargetSet(set));
115 }
116
117 /**
118 * UnicodeFunctor API
119 */
setData(const TransliterationRuleData * d)120 void FunctionReplacer::setData(const TransliterationRuleData* d) {
121 replacer->setData(d);
122 }
123
124 U_NAMESPACE_END
125
126 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
127
128 //eof
129