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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <breakiterator_unicode.hxx>
#include <localedata.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <i18nlangtag/languagetagicu.hxx>
#include <unicode/uchar.h>
#include <unicode/locid.h>
#include <unicode/rbbi.h>
#include <unicode/udata.h>
#include <rtl/strbuf.hxx>
#include <rtl/ustring.hxx>
#include <string.h>
U_CDECL_BEGIN
extern const char OpenOffice_dat[];
U_CDECL_END
using namespace ::com::sun::star;
using namespace ::com::sun::star::lang;
using namespace ::rtl;
namespace com { namespace sun { namespace star { namespace i18n {
BreakIterator_Unicode::BreakIterator_Unicode() :
cBreakIterator( "com.sun.star.i18n.BreakIterator_Unicode" ), // implementation name
wordRule( "word" ),
lineRule( "line" ),
icuBI( NULL )
{
}
BreakIterator_Unicode::~BreakIterator_Unicode()
{
delete character.aBreakIterator;
delete sentence.aBreakIterator;
delete line.aBreakIterator;
for (size_t i = 0; i < SAL_N_ELEMENTS(words); i++)
delete words[i].aBreakIterator;
}
/*
Wrapper class to provide public access to the RuleBasedBreakIterator's
setbreakType method.
*/
class OOoRuleBasedBreakIterator : public RuleBasedBreakIterator {
public:
inline void publicSetBreakType(int32_t type) {
setBreakType(type);
};
OOoRuleBasedBreakIterator(UDataMemory* image,
UErrorCode &status) :
RuleBasedBreakIterator(image, status) { };
};
// loading ICU breakiterator on demand.
void SAL_CALL BreakIterator_Unicode::loadICUBreakIterator(const com::sun::star::lang::Locale& rLocale,
sal_Int16 rBreakType, sal_Int16 nWordType, const sal_Char *rule, const OUString& rText) throw(uno::RuntimeException)
{
sal_Bool newBreak = sal_False;
UErrorCode status = U_ZERO_ERROR;
sal_Int16 breakType = 0;
switch (rBreakType) {
case LOAD_CHARACTER_BREAKITERATOR: icuBI=&character; breakType = 3; break;
case LOAD_WORD_BREAKITERATOR:
assert (nWordType >= 0 && nWordType<= WordType::WORD_COUNT);
icuBI=&words[nWordType];
switch (nWordType) {
case WordType::ANY_WORD: break; // odd but previous behavior
case WordType::ANYWORD_IGNOREWHITESPACES:
breakType = 0; rule = wordRule = "edit_word"; break;
case WordType::DICTIONARY_WORD:
breakType = 1; rule = wordRule = "dict_word"; break;
default:
case WordType::WORD_COUNT:
breakType = 2; rule = wordRule = "count_word"; break;
}
break;
case LOAD_SENTENCE_BREAKITERATOR: icuBI=&sentence; breakType = 5; break;
case LOAD_LINE_BREAKITERATOR: icuBI=&line; breakType = 4; break;
}
if (!icuBI->aBreakIterator ||
rLocale.Language != icuBI->maLocale.Language ||
rLocale.Country != icuBI->maLocale.Country ||
rLocale.Variant != icuBI->maLocale.Variant) {
if (icuBI->aBreakIterator) {
delete icuBI->aBreakIterator;
icuBI->aBreakIterator=NULL;
}
if (rule) {
uno::Sequence< OUString > breakRules = LocaleDataImpl().getBreakIteratorRules(rLocale);
status = U_ZERO_ERROR;
udata_setAppData("OpenOffice", OpenOffice_dat, &status);
if ( !U_SUCCESS(status) ) throw uno::RuntimeException();
OOoRuleBasedBreakIterator *rbi = NULL;
if (breakRules.getLength() > breakType && !breakRules[breakType].isEmpty())
{
rbi = new OOoRuleBasedBreakIterator(udata_open("OpenOffice", "brk",
OUStringToOString(breakRules[breakType], RTL_TEXTENCODING_ASCII_US).getStr(), &status), status);
}
//use icu's breakiterator for Thai, Khmer, Tibetan and Dzongkha
else if (rLocale.Language != "th" && rLocale.Language != "km" && rLocale.Language != "bo" && rLocale.Language != "dz")
{
status = U_ZERO_ERROR;
OStringBuffer aUDName(64);
aUDName.append(rule);
aUDName.append('_');
aUDName.append( OUStringToOString(rLocale.Language, RTL_TEXTENCODING_ASCII_US));
UDataMemory* pUData = udata_open("OpenOffice", "brk", aUDName.getStr(), &status);
if( U_SUCCESS(status) )
rbi = new OOoRuleBasedBreakIterator( pUData, status);
if (!U_SUCCESS(status) ) {
status = U_ZERO_ERROR;
pUData = udata_open("OpenOffice", "brk", rule, &status);
if( U_SUCCESS(status) )
rbi = new OOoRuleBasedBreakIterator( pUData, status);
if (!U_SUCCESS(status) ) icuBI->aBreakIterator=NULL;
}
}
if (rbi) {
switch (rBreakType) {
case LOAD_CHARACTER_BREAKITERATOR: rbi->publicSetBreakType(UBRK_CHARACTER); break;
case LOAD_WORD_BREAKITERATOR: rbi->publicSetBreakType(UBRK_WORD); break;
case LOAD_SENTENCE_BREAKITERATOR: rbi->publicSetBreakType(UBRK_SENTENCE); break;
case LOAD_LINE_BREAKITERATOR: rbi->publicSetBreakType(UBRK_LINE); break;
}
icuBI->aBreakIterator = rbi;
}
}
if (!icuBI->aBreakIterator) {
icu::Locale icuLocale( LanguageTagIcu::getIcuLocale( LanguageTag( rLocale)));
status = U_ZERO_ERROR;
switch (rBreakType) {
case LOAD_CHARACTER_BREAKITERATOR:
icuBI->aBreakIterator = icu::BreakIterator::createCharacterInstance(icuLocale, status);
break;
case LOAD_WORD_BREAKITERATOR:
icuBI->aBreakIterator = icu::BreakIterator::createWordInstance(icuLocale, status);
break;
case LOAD_SENTENCE_BREAKITERATOR:
icuBI->aBreakIterator = icu::BreakIterator::createSentenceInstance(icuLocale, status);
break;
case LOAD_LINE_BREAKITERATOR:
icuBI->aBreakIterator = icu::BreakIterator::createLineInstance(icuLocale, status);
break;
}
if ( !U_SUCCESS(status) ) {
icuBI->aBreakIterator=NULL;
throw uno::RuntimeException();
}
}
if (icuBI->aBreakIterator) {
icuBI->maLocale=rLocale;
newBreak=sal_True;
} else {
throw uno::RuntimeException();
}
}
if (newBreak || !icuBI->aICUText.equals(rText))
{
// UChar != sal_Unicode in MinGW
const UChar *pText = reinterpret_cast<const UChar *>(rText.getStr());
icuBI->ut = utext_openUChars(icuBI->ut, pText, rText.getLength(), &status);
if (!U_SUCCESS(status))
throw uno::RuntimeException();
icuBI->aBreakIterator->setText(icuBI->ut, status);
if (!U_SUCCESS(status))
throw uno::RuntimeException();
icuBI->aICUText = rText;
}
}
sal_Int32 SAL_CALL BreakIterator_Unicode::nextCharacters( const OUString& Text,
sal_Int32 nStartPos, const lang::Locale &rLocale,
sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone )
throw(uno::RuntimeException)
{
if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) { // for CELL mode
loadICUBreakIterator(rLocale, LOAD_CHARACTER_BREAKITERATOR, 0, "char", Text);
for (nDone = 0; nDone < nCount; nDone++) {
nStartPos = character.aBreakIterator->following(nStartPos);
if (nStartPos == BreakIterator::DONE)
return Text.getLength();
}
} else { // for CHARACTER mode
for (nDone = 0; nDone < nCount && nStartPos < Text.getLength(); nDone++)
Text.iterateCodePoints(&nStartPos, 1);
}
return nStartPos;
}
sal_Int32 SAL_CALL BreakIterator_Unicode::previousCharacters( const OUString& Text,
sal_Int32 nStartPos, const lang::Locale& rLocale,
sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone )
throw(uno::RuntimeException)
{
if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) { // for CELL mode
loadICUBreakIterator(rLocale, LOAD_CHARACTER_BREAKITERATOR, 0, "char", Text);
for (nDone = 0; nDone < nCount; nDone++) {
nStartPos = character.aBreakIterator->preceding(nStartPos);
if (nStartPos == BreakIterator::DONE)
return 0;
}
} else { // for BS to delete one char and CHARACTER mode.
for (nDone = 0; nDone < nCount && nStartPos > 0; nDone++)
Text.iterateCodePoints(&nStartPos, -1);
}
return nStartPos;
}
Boundary SAL_CALL BreakIterator_Unicode::nextWord( const OUString& Text, sal_Int32 nStartPos,
const lang::Locale& rLocale, sal_Int16 rWordType ) throw(uno::RuntimeException)
{
loadICUBreakIterator(rLocale, LOAD_WORD_BREAKITERATOR, rWordType, NULL, Text);
result.startPos = icuBI->aBreakIterator->following(nStartPos);
if( result.startPos >= Text.getLength() || result.startPos == BreakIterator::DONE )
result.endPos = result.startPos;
else {
if ( (rWordType == WordType::ANYWORD_IGNOREWHITESPACES ||
rWordType == WordType::DICTIONARY_WORD ) &&
u_isWhitespace(Text.iterateCodePoints(&result.startPos, 0)) )
result.startPos = icuBI->aBreakIterator->following(result.startPos);
result.endPos = icuBI->aBreakIterator->following(result.startPos);
if(result.endPos == BreakIterator::DONE)
result.endPos = result.startPos;
}
return result;
}
Boundary SAL_CALL BreakIterator_Unicode::previousWord(const OUString& Text, sal_Int32 nStartPos,
const lang::Locale& rLocale, sal_Int16 rWordType) throw(uno::RuntimeException)
{
loadICUBreakIterator(rLocale, LOAD_WORD_BREAKITERATOR, rWordType, NULL, Text);
result.startPos = icuBI->aBreakIterator->preceding(nStartPos);
if( result.startPos < 0 || result.startPos == BreakIterator::DONE)
result.endPos = result.startPos;
else {
if ( (rWordType == WordType::ANYWORD_IGNOREWHITESPACES ||
rWordType == WordType::DICTIONARY_WORD) &&
u_isWhitespace(Text.iterateCodePoints(&result.startPos, 0)) )
result.startPos = icuBI->aBreakIterator->preceding(result.startPos);
result.endPos = icuBI->aBreakIterator->following(result.startPos);
if(result.endPos == BreakIterator::DONE)
result.endPos = result.startPos;
}
return result;
}
Boundary SAL_CALL BreakIterator_Unicode::getWordBoundary( const OUString& Text, sal_Int32 nPos, const lang::Locale& rLocale,
sal_Int16 rWordType, sal_Bool bDirection ) throw(uno::RuntimeException)
{
loadICUBreakIterator(rLocale, LOAD_WORD_BREAKITERATOR, rWordType, NULL, Text);
sal_Int32 len = Text.getLength();
if(icuBI->aBreakIterator->isBoundary(nPos)) {
result.startPos = result.endPos = nPos;
if((bDirection || nPos == 0) && nPos < len) //forward
result.endPos = icuBI->aBreakIterator->following(nPos);
else
result.startPos = icuBI->aBreakIterator->preceding(nPos);
} else {
if(nPos <= 0) {
result.startPos = 0;
result.endPos = len ? icuBI->aBreakIterator->following((sal_Int32)0) : 0;
} else if(nPos >= len) {
result.startPos = icuBI->aBreakIterator->preceding(len);
result.endPos = len;
} else {
result.startPos = icuBI->aBreakIterator->preceding(nPos);
result.endPos = icuBI->aBreakIterator->following(nPos);
}
}
if (result.startPos == BreakIterator::DONE)
result.startPos = result.endPos;
else if (result.endPos == BreakIterator::DONE)
result.endPos = result.startPos;
return result;
}
sal_Int32 SAL_CALL BreakIterator_Unicode::beginOfSentence( const OUString& Text, sal_Int32 nStartPos,
const lang::Locale &rLocale ) throw(uno::RuntimeException)
{
loadICUBreakIterator(rLocale, LOAD_SENTENCE_BREAKITERATOR, 0, "sent", Text);
sal_Int32 len = Text.getLength();
if (len > 0 && nStartPos == len)
Text.iterateCodePoints(&nStartPos, -1); // issue #i27703# treat end position as part of last sentence
if (!sentence.aBreakIterator->isBoundary(nStartPos))
nStartPos = sentence.aBreakIterator->preceding(nStartPos);
// skip preceding space.
sal_uInt32 ch = Text.iterateCodePoints(&nStartPos, 1);
while (nStartPos < len && u_isWhitespace(ch)) ch = Text.iterateCodePoints(&nStartPos, 1);
Text.iterateCodePoints(&nStartPos, -1);
return nStartPos;
}
sal_Int32 SAL_CALL BreakIterator_Unicode::endOfSentence( const OUString& Text, sal_Int32 nStartPos,
const lang::Locale &rLocale ) throw(uno::RuntimeException)
{
loadICUBreakIterator(rLocale, LOAD_SENTENCE_BREAKITERATOR, 0, "sent", Text);
sal_Int32 len = Text.getLength();
if (len > 0 && nStartPos == len)
Text.iterateCodePoints(&nStartPos, -1); // issue #i27703# treat end position as part of last sentence
nStartPos = sentence.aBreakIterator->following(nStartPos);
sal_Int32 nPos=nStartPos;
while (nPos > 0 && u_isWhitespace(Text.iterateCodePoints(&nPos, -1))) nStartPos=nPos;
return nStartPos;
}
LineBreakResults SAL_CALL BreakIterator_Unicode::getLineBreak(
const OUString& Text, sal_Int32 nStartPos,
const lang::Locale& rLocale, sal_Int32 nMinBreakPos,
const LineBreakHyphenationOptions& hOptions,
const LineBreakUserOptions& /*rOptions*/ ) throw(uno::RuntimeException)
{
LineBreakResults lbr;
if (nStartPos >= Text.getLength()) {
lbr.breakIndex = Text.getLength();
lbr.breakType = BreakType::WORDBOUNDARY;
return lbr;
}
loadICUBreakIterator(rLocale, LOAD_LINE_BREAKITERATOR, 0, lineRule, Text);
sal_Bool GlueSpace=sal_True;
while (GlueSpace) {
if (line.aBreakIterator->preceding(nStartPos + 1) == nStartPos) { //Line boundary break
lbr.breakIndex = nStartPos;
lbr.breakType = BreakType::WORDBOUNDARY;
} else if (hOptions.rHyphenator.is()) { //Hyphenation break
sal_Int32 boundary_with_punctuation = (line.aBreakIterator->next() != BreakIterator::DONE) ? line.aBreakIterator->current() : 0;
line.aBreakIterator->preceding(nStartPos + 1); // reset to check correct hyphenation of "word-word"
sal_Int32 nStartPosWordEnd = nStartPos;
while (line.aBreakIterator->current() < nStartPosWordEnd && u_ispunct((sal_uInt32)Text[nStartPosWordEnd])) // starting punctuation
nStartPosWordEnd --;
Boundary wBoundary = getWordBoundary( Text, nStartPosWordEnd, rLocale,
WordType::DICTIONARY_WORD, false);
nStartPosWordEnd = wBoundary.endPos;
while (nStartPosWordEnd < Text.getLength() && (u_ispunct((sal_uInt32)Text[nStartPosWordEnd]))) // ending punctuation
nStartPosWordEnd ++;
nStartPosWordEnd = nStartPosWordEnd - wBoundary.endPos;
if (hOptions.hyphenIndex - wBoundary.startPos < nStartPosWordEnd) nStartPosWordEnd = hOptions.hyphenIndex - wBoundary.startPos;
#define SPACE 0x0020
while (boundary_with_punctuation > wBoundary.endPos && Text[--boundary_with_punctuation] == SPACE);
if (boundary_with_punctuation != 0) boundary_with_punctuation += 1 - wBoundary.endPos;
uno::Reference< linguistic2::XHyphenatedWord > aHyphenatedWord;
aHyphenatedWord = hOptions.rHyphenator->hyphenate(Text.copy(wBoundary.startPos,
wBoundary.endPos - wBoundary.startPos), rLocale,
(sal_Int16) (hOptions.hyphenIndex - wBoundary.startPos - nStartPosWordEnd), hOptions.aHyphenationOptions);
if (aHyphenatedWord.is()) {
lbr.rHyphenatedWord = aHyphenatedWord;
if(wBoundary.startPos + aHyphenatedWord->getHyphenationPos() + 1 < nMinBreakPos )
lbr.breakIndex = -1;
else
lbr.breakIndex = wBoundary.startPos; //aHyphenatedWord->getHyphenationPos();
lbr.breakType = BreakType::HYPHENATION;
// check not optimal hyphenation of "word-word" (word with hyphens)
if (lbr.breakIndex > -1 && wBoundary.startPos + aHyphenatedWord->getHyphenationPos() < line.aBreakIterator->current()) {
lbr.breakIndex = line.aBreakIterator->current();
lbr.breakType = BreakType::WORDBOUNDARY;
}
} else {
lbr.breakIndex = line.aBreakIterator->preceding(nStartPos);
lbr.breakType = BreakType::WORDBOUNDARY;;
}
} else { //word boundary break
lbr.breakIndex = line.aBreakIterator->preceding(nStartPos);
lbr.breakType = BreakType::WORDBOUNDARY;
}
#define WJ 0x2060 // Word Joiner
GlueSpace=sal_False;
if (lbr.breakType == BreakType::WORDBOUNDARY) {
nStartPos = lbr.breakIndex;
if (Text[nStartPos--] == WJ)
GlueSpace=sal_True;
while (nStartPos >= 0 &&
(u_isWhitespace(Text.iterateCodePoints(&nStartPos, 0)) || Text[nStartPos] == WJ)) {
if (Text[nStartPos--] == WJ)
GlueSpace=sal_True;
}
if (GlueSpace && nStartPos < 0) {
lbr.breakIndex = 0;
break;
}
}
}
return lbr;
}
OUString SAL_CALL
BreakIterator_Unicode::getImplementationName(void) throw( uno::RuntimeException )
{
return OUString::createFromAscii(cBreakIterator);
}
sal_Bool SAL_CALL
BreakIterator_Unicode::supportsService(const OUString& rServiceName) throw( uno::RuntimeException )
{
return !rServiceName.compareToAscii(cBreakIterator);
}
uno::Sequence< OUString > SAL_CALL
BreakIterator_Unicode::getSupportedServiceNames(void) throw( uno::RuntimeException )
{
uno::Sequence< OUString > aRet(1);
aRet[0] = OUString::createFromAscii(cBreakIterator);
return aRet;
}
} } } }
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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