michael@0: /*
michael@0: **********************************************************************
michael@0: *   Copyright (c) 2002-2012, International Business Machines Corporation
michael@0: *   and others.  All Rights Reserved.
michael@0: **********************************************************************
michael@0: *   Date        Name        Description
michael@0: *   02/04/2002  aliu        Creation.
michael@0: **********************************************************************
michael@0: */
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: 
michael@0: #if !UCONFIG_NO_TRANSLITERATION
michael@0: 
michael@0: #include "unicode/translit.h"
michael@0: #include "unicode/uniset.h"
michael@0: #include "funcrepl.h"
michael@0: 
michael@0: static const UChar AMPERSAND = 38; // '&'
michael@0: static const UChar OPEN[]    = {40,32,0}; // "( "
michael@0: static const UChar CLOSE[]   = {32,41,0}; // " )"
michael@0: 
michael@0: U_NAMESPACE_BEGIN
michael@0: 
michael@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FunctionReplacer)
michael@0: 
michael@0: /**
michael@0:  * Construct a replacer that takes the output of the given
michael@0:  * replacer, passes it through the given transliterator, and emits
michael@0:  * the result as output.
michael@0:  */
michael@0: FunctionReplacer::FunctionReplacer(Transliterator* adoptedTranslit,
michael@0:                                    UnicodeFunctor* adoptedReplacer) {
michael@0:     translit = adoptedTranslit;
michael@0:     replacer = adoptedReplacer;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Copy constructor.
michael@0:  */
michael@0: FunctionReplacer::FunctionReplacer(const FunctionReplacer& other) :
michael@0:     UnicodeFunctor(other),
michael@0:     UnicodeReplacer(other)
michael@0: {
michael@0:     translit = other.translit->clone();
michael@0:     replacer = other.replacer->clone();
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Destructor
michael@0:  */
michael@0: FunctionReplacer::~FunctionReplacer() {
michael@0:     delete translit;
michael@0:     delete replacer;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Implement UnicodeFunctor
michael@0:  */
michael@0: UnicodeFunctor* FunctionReplacer::clone() const {
michael@0:     return new FunctionReplacer(*this);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
michael@0:  * and return the pointer.
michael@0:  */
michael@0: UnicodeReplacer* FunctionReplacer::toReplacer() const {
michael@0:   FunctionReplacer  *nonconst_this = const_cast<FunctionReplacer *>(this);
michael@0:   UnicodeReplacer *nonconst_base = static_cast<UnicodeReplacer *>(nonconst_this);
michael@0:   
michael@0:   return nonconst_base;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * UnicodeReplacer API
michael@0:  */
michael@0: int32_t FunctionReplacer::replace(Replaceable& text,
michael@0:                                   int32_t start,
michael@0:                                   int32_t limit,
michael@0:                                   int32_t& cursor)
michael@0: {
michael@0: 
michael@0:     // First delegate to subordinate replacer
michael@0:     int32_t len = replacer->toReplacer()->replace(text, start, limit, cursor);
michael@0:     limit = start + len;
michael@0: 
michael@0:     // Now transliterate
michael@0:     limit = translit->transliterate(text, start, limit);
michael@0: 
michael@0:     return limit - start;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * UnicodeReplacer API
michael@0:  */
michael@0: UnicodeString& FunctionReplacer::toReplacerPattern(UnicodeString& rule,
michael@0:                                                    UBool escapeUnprintable) const {
michael@0:     UnicodeString str;
michael@0:     rule.truncate(0);
michael@0:     rule.append(AMPERSAND);
michael@0:     rule.append(translit->getID());
michael@0:     rule.append(OPEN, 2);
michael@0:     rule.append(replacer->toReplacer()->toReplacerPattern(str, escapeUnprintable));
michael@0:     rule.append(CLOSE, 2);
michael@0:     return rule;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Implement UnicodeReplacer
michael@0:  */
michael@0: void FunctionReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
michael@0:     UnicodeSet set;
michael@0:     toUnionTo.addAll(translit->getTargetSet(set));
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * UnicodeFunctor API
michael@0:  */
michael@0: void FunctionReplacer::setData(const TransliterationRuleData* d) {
michael@0:     replacer->setData(d);
michael@0: }
michael@0: 
michael@0: U_NAMESPACE_END
michael@0: 
michael@0: #endif /* #if !UCONFIG_NO_TRANSLITERATION */
michael@0: 
michael@0: //eof