116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 06/06/01 aliu Creation.
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**********************************************************************
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*/
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#include "unicode/unifilt.h"
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#include "unicode/uchar.h"
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#include "uni2name.h"
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#include "cstring.h"
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U_NAMESPACE_BEGIN
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const char UnicodeNameTransliterator::fgClassID=0;
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const char UnicodeNameTransliterator::_ID[] = "Any-Name";
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/**
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* Constructs a transliterator.
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*/
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UnicodeNameTransliterator::UnicodeNameTransliterator(
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UChar32 openDelim, UChar32 closeDelim,
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UnicodeFilter* adoptedFilter) :
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Transliterator(_ID, adoptedFilter),
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openDelimiter(openDelim),
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closeDelimiter(closeDelim) {
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}
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/**
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* Constructs a transliterator with the default delimiters '{' and
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* '}'.
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*/
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UnicodeNameTransliterator::UnicodeNameTransliterator(UnicodeFilter* adoptedFilter) :
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Transliterator(_ID, adoptedFilter),
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openDelimiter((UChar) 0x007B /*{*/),
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closeDelimiter((UChar) 0x007D /*}*/) {
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}
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/**
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* Destructor.
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*/
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UnicodeNameTransliterator::~UnicodeNameTransliterator() {}
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/**
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* Copy constructor.
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*/
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UnicodeNameTransliterator::UnicodeNameTransliterator(const UnicodeNameTransliterator& o) :
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Transliterator(o),
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openDelimiter(o.openDelimiter),
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closeDelimiter(o.closeDelimiter) {}
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/**
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* Assignment operator.
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*/
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UnicodeNameTransliterator& UnicodeNameTransliterator::operator=(
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const UnicodeNameTransliterator& o) {
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Transliterator::operator=(o);
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openDelimiter = o.openDelimiter;
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closeDelimiter = o.closeDelimiter;
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return *this;
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}
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/**
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* Transliterator API.
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*/
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Transliterator* UnicodeNameTransliterator::clone(void) const {
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return new UnicodeNameTransliterator(*this);
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}
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/**
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* Implements {@link Transliterator#handleTransliterate}.
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* Ignore isIncremental since we don't need the context, and
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* we work on codepoints.
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*/
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void UnicodeNameTransliterator::handleTransliterate(Replaceable& text, UTransPosition& offsets,
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UBool /*isIncremental*/) const {
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// As of Unicode 3.0.0, the longest name is 83 characters long.
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// Adjust this buffer size as needed.
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char buf[128];
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int32_t cursor = offsets.start;
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int32_t limit = offsets.limit;
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UnicodeString str(openDelimiter);
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UErrorCode status;
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int32_t len;
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while (cursor < limit) {
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UChar32 c = text.char32At(cursor);
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int32_t clen = UTF_CHAR_LENGTH(c);
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status = U_ZERO_ERROR;
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if ((len = u_charName(c, U_EXTENDED_CHAR_NAME, buf, sizeof(buf), &status)) >0 && !U_FAILURE(status)) {
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str.truncate(1);
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str.append(UnicodeString(buf, len, "")).append(closeDelimiter);
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text.handleReplaceBetween(cursor, cursor+clen, str);
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len += 2; // adjust for delimiters
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cursor += len; // advance cursor and adjust for new text
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limit += len-clen; // change in length
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} else {
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cursor += clen;
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}
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}
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offsets.contextLimit += limit - offsets.limit;
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offsets.limit = limit;
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offsets.start = cursor;
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}
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U_NAMESPACE_END
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