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/*
**********************************************************************
* Copyright (c) 2001-2006, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Date Name Description
* 11/19/2001 aliu Creation.
**********************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_TRANSLITERATION
#include "esctrn.h"
#include "util.h"
U_NAMESPACE_BEGIN
static const UChar UNIPRE[] = {85,43,0}; // "U+"
static const UChar BS_u[] = {92,117,0}; // "\\u"
static const UChar BS_U[] = {92,85,0}; // "\\U"
static const UChar XMLPRE[] = {38,35,120,0}; // "&#x"
static const UChar XML10PRE[] = {38,35,0}; // "&#"
static const UChar PERLPRE[] = {92,120,123,0}; // "\\x{"
static const UChar SEMI[] = {59,0}; // ";"
static const UChar RBRACE[] = {125,0}; // "}"
static const UChar EMPTY[] = {0}; // ""
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EscapeTransliterator)
/**
* Factory methods
*/
static Transliterator* _createEscUnicode(const UnicodeString& ID, Transliterator::Token /*context*/) {
// Unicode: "U+10FFFF" hex, min=4, max=6
return new EscapeTransliterator(ID, UNIPRE, EMPTY, 16, 4, TRUE, NULL);
}
static Transliterator* _createEscJava(const UnicodeString& ID, Transliterator::Token /*context*/) {
// Java: "\\uFFFF" hex, min=4, max=4
return new EscapeTransliterator(ID, BS_u, EMPTY, 16, 4, FALSE, NULL);
}
static Transliterator* _createEscC(const UnicodeString& ID, Transliterator::Token /*context*/) {
// C: "\\uFFFF" hex, min=4, max=4; \\U0010FFFF hex, min=8, max=8
return new EscapeTransliterator(ID, BS_u, EMPTY, 16, 4, TRUE,
new EscapeTransliterator(EMPTY, BS_U, EMPTY, 16, 8, TRUE, NULL));
}
static Transliterator* _createEscXML(const UnicodeString& ID, Transliterator::Token /*context*/) {
// XML: "" hex, min=1, max=6
return new EscapeTransliterator(ID, XMLPRE, SEMI, 16, 1, TRUE, NULL);
}
static Transliterator* _createEscXML10(const UnicodeString& ID, Transliterator::Token /*context*/) {
// XML10: "&1114111;" dec, min=1, max=7 (not really "Any-Hex")
return new EscapeTransliterator(ID, XML10PRE, SEMI, 10, 1, TRUE, NULL);
}
static Transliterator* _createEscPerl(const UnicodeString& ID, Transliterator::Token /*context*/) {
// Perl: "\\x{263A}" hex, min=1, max=6
return new EscapeTransliterator(ID, PERLPRE, RBRACE, 16, 1, TRUE, NULL);
}
/**
* Registers standard variants with the system. Called by
* Transliterator during initialization.
*/
void EscapeTransliterator::registerIDs() {
Token t = integerToken(0);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/Unicode"), _createEscUnicode, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/Java"), _createEscJava, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/C"), _createEscC, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/XML"), _createEscXML, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/XML10"), _createEscXML10, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex/Perl"), _createEscPerl, t);
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-Hex"), _createEscJava, t);
}
/**
* Constructs an escape transliterator with the given ID and
* parameters. See the class member documentation for details.
*/
EscapeTransliterator::EscapeTransliterator(const UnicodeString& newID,
const UnicodeString& _prefix, const UnicodeString& _suffix,
int32_t _radix, int32_t _minDigits,
UBool _grokSupplementals,
EscapeTransliterator* adoptedSupplementalHandler) :
Transliterator(newID, NULL)
{
this->prefix = _prefix;
this->suffix = _suffix;
this->radix = _radix;
this->minDigits = _minDigits;
this->grokSupplementals = _grokSupplementals;
this->supplementalHandler = adoptedSupplementalHandler;
}
/**
* Copy constructor.
*/
EscapeTransliterator::EscapeTransliterator(const EscapeTransliterator& o) :
Transliterator(o),
prefix(o.prefix),
suffix(o.suffix),
radix(o.radix),
minDigits(o.minDigits),
grokSupplementals(o.grokSupplementals) {
supplementalHandler = (o.supplementalHandler != 0) ?
new EscapeTransliterator(*o.supplementalHandler) : NULL;
}
EscapeTransliterator::~EscapeTransliterator() {
delete supplementalHandler;
}
/**
* Transliterator API.
*/
Transliterator* EscapeTransliterator::clone() const {
return new EscapeTransliterator(*this);
}
/**
* Implements {@link Transliterator#handleTransliterate}.
*/
void EscapeTransliterator::handleTransliterate(Replaceable& text,
UTransPosition& pos,
UBool /*isIncremental*/) const
{
/* TODO: Verify that isIncremental can be ignored */
int32_t start = pos.start;
int32_t limit = pos.limit;
UnicodeString buf(prefix);
int32_t prefixLen = prefix.length();
UBool redoPrefix = FALSE;
while (start < limit) {
int32_t c = grokSupplementals ? text.char32At(start) : text.charAt(start);
int32_t charLen = grokSupplementals ? UTF_CHAR_LENGTH(c) : 1;
if ((c & 0xFFFF0000) != 0 && supplementalHandler != NULL) {
buf.truncate(0);
buf.append(supplementalHandler->prefix);
ICU_Utility::appendNumber(buf, c, supplementalHandler->radix,
supplementalHandler->minDigits);
buf.append(supplementalHandler->suffix);
redoPrefix = TRUE;
} else {
if (redoPrefix) {
buf.truncate(0);
buf.append(prefix);
redoPrefix = FALSE;
} else {
buf.truncate(prefixLen);
}
ICU_Utility::appendNumber(buf, c, radix, minDigits);
buf.append(suffix);
}
text.handleReplaceBetween(start, start + charLen, buf);
start += buf.length();
limit += buf.length() - charLen;
}
pos.contextLimit += limit - pos.limit;
pos.limit = limit;
pos.start = start;
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_TRANSLITERATION */
//eof
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