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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 <config_folders.h>
#include <osl/file.h>
#include <osl/mutex.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/bootstrap.hxx>
#include <com/sun/star/i18n/WordType.hpp>
#include <xdictionary.hxx>
#include <unicode/uchar.h>
#include <string.h>
#include <breakiteratorImpl.hxx>
namespace com { namespace sun { namespace star { namespace i18n {
#ifdef DICT_JA_ZH_IN_DATAFILE
#elif !defined DISABLE_DYNLOADING
extern "C" { static void SAL_CALL thisModule() {} }
#else
extern "C" {
sal_uInt8* getExistMark_ja();
sal_Int16* getIndex1_ja();
sal_Int32* getIndex2_ja();
sal_Int32* getLenArray_ja();
sal_Unicode* getDataArea_ja();
sal_uInt8* getExistMark_zh();
sal_Int16* getIndex1_zh();
sal_Int32* getIndex2_zh();
sal_Int32* getLenArray_zh();
sal_Unicode* getDataArea_zh();
}
#endif
xdictionary::xdictionary(const sal_Char *lang) :
boundary(),
japaneseWordBreak( false )
{
#ifdef DICT_JA_ZH_IN_DATAFILE
if( strcmp( lang, "ja" ) == 0 || strcmp( lang, "zh" ) == 0 )
{
OUString sUrl( "$BRAND_BASE_DIR/" LIBO_SHARE_FOLDER "/dict_" );
rtl::Bootstrap::expandMacros(sUrl);
if( strcmp( lang, "ja" ) == 0 )
sUrl += "ja.data";
else if( strcmp( lang, "zh" ) == 0 )
sUrl += "zh.data";
oslFileHandle aFileHandle;
sal_uInt64 nFileSize;
char *pMapping;
if( osl_openFile( sUrl.pData, &aFileHandle, osl_File_OpenFlag_Read ) == osl_File_E_None &&
osl_getFileSize( aFileHandle, &nFileSize) == osl_File_E_None &&
osl_mapFile( aFileHandle, (void **) &pMapping, nFileSize, 0, osl_File_MapFlag_RandomAccess ) == osl_File_E_None )
{
// We have the offsets to the parts of the file at its end, see gendict.cxx
sal_Int64 *pEOF = (sal_Int64*)(pMapping + nFileSize);
data.existMark = (sal_uInt8*) (pMapping + pEOF[-1]);
data.index2 = (sal_Int32*) (pMapping + pEOF[-2]);
data.index1 = (sal_Int16*) (pMapping + pEOF[-3]);
data.lenArray = (sal_Int32*) (pMapping + pEOF[-4]);
data.dataArea = (sal_Unicode*) (pMapping + pEOF[-5]);
}
}
#elif !defined DISABLE_DYNLOADING
initDictionaryData( lang );
#else
if( strcmp( lang, "ja" ) == 0 ) {
data.existMark = getExistMark_ja();
data.index1 = getIndex1_ja();
data.index2 = getIndex2_ja();
data.lenArray = getLenArray_ja();
data.dataArea = getDataArea_ja();
}
else if( strcmp( lang, "zh" ) == 0 ) {
data.existMark = getExistMark_zh();
data.index1 = getIndex1_zh();
data.index2 = getIndex2_zh();
data.lenArray = getLenArray_zh();
data.dataArea = getDataArea_zh();
}
#endif
for (sal_Int32 i = 0; i < CACHE_MAX; i++)
cache[i].size = 0;
japaneseWordBreak = false;
}
xdictionary::~xdictionary()
{
for (sal_Int32 i = 0; i < CACHE_MAX; i++) {
if (cache[i].size > 0) {
delete [] cache[i].contents;
delete [] cache[i].wordboundary;
}
}
}
namespace {
struct datacache {
oslModule mhModule;
OString maLang;
xdictionarydata maData;
};
}
#if !defined(DICT_JA_ZH_IN_DATAFILE) && !defined(DISABLE_DYNLOADING)
void xdictionary::initDictionaryData(const sal_Char *pLang)
{
// Global cache, never released for performance
static std::vector< datacache > aLoadedCache;
osl::MutexGuard aGuard( osl::Mutex::getGlobalMutex() );
for( size_t i = 0; i < aLoadedCache.size(); ++i )
{
if( !strcmp( pLang, aLoadedCache[ i ].maLang.getStr() ) )
{
data = aLoadedCache[ i ].maData;
return;
}
}
// otherwise add to the cache, positive or negative.
datacache aEntry;
aEntry.maLang = OString( pLang, strlen( pLang ) );
#ifdef SAL_DLLPREFIX
OUStringBuffer aBuf( sal::static_int_cast<int>(strlen(pLang) + 7 + 6) ); // mostly "lib*.so" (with * == dict_zh)
aBuf.appendAscii( SAL_DLLPREFIX );
#else
OUStringBuffer aBuf( sal::static_int_cast<int>(strlen(pLang) + 7 + 4) ); // mostly "*.dll" (with * == dict_zh)
#endif
aBuf.appendAscii( "dict_" ).appendAscii( pLang ).appendAscii( SAL_DLLEXTENSION );
aEntry.mhModule = osl_loadModuleRelative( &thisModule, aBuf.makeStringAndClear().pData, SAL_LOADMODULE_DEFAULT );
if( aEntry.mhModule ) {
oslGenericFunction func;
func = osl_getAsciiFunctionSymbol( aEntry.mhModule, "getExistMark" );
aEntry.maData.existMark = reinterpret_cast<sal_uInt8 const * (*)()>(func)();
func = osl_getAsciiFunctionSymbol( aEntry.mhModule, "getIndex1" );
aEntry.maData.index1 = reinterpret_cast<sal_Int16 const * (*)()>(func)();
func = osl_getAsciiFunctionSymbol( aEntry.mhModule, "getIndex2" );
aEntry.maData.index2 = reinterpret_cast<sal_Int32 const * (*)()>(func)();
func = osl_getAsciiFunctionSymbol( aEntry.mhModule, "getLenArray" );
aEntry.maData.lenArray = reinterpret_cast<sal_Int32 const * (*)()>(func)();
func = osl_getAsciiFunctionSymbol( aEntry.mhModule, "getDataArea" );
aEntry.maData.dataArea = reinterpret_cast<sal_Unicode const * (*)()>(func)();
}
data = aEntry.maData;
aLoadedCache.push_back( aEntry );
}
#endif
void xdictionary::setJapaneseWordBreak()
{
japaneseWordBreak = true;
}
bool xdictionary::exists(const sal_uInt32 c)
{
// 0x1FFF is the hardcoded limit in gendict for data.existMarks
bool exist = (data.existMark && ((c>>3) < 0x1FFF)) ? sal::static_int_cast<sal_Bool>((data.existMark[c>>3] & (1<<(c&0x07))) != 0) : sal_False;
if (!exist && japaneseWordBreak)
return BreakIteratorImpl::getScriptClass(c) == ScriptType::ASIAN;
else
return exist;
}
sal_Int32 xdictionary::getLongestMatch(const sal_Unicode* str, sal_Int32 sLen)
{
if ( !data.index1 ) return 0;
sal_Int16 idx = data.index1[str[0] >> 8];
if (idx == 0xFF) return 0;
idx = (idx<<8) | (str[0]&0xff);
sal_uInt32 begin = data.index2[idx], end = data.index2[idx+1];
if (begin == 0) return 0;
str++; sLen--; // first character is not stored in the dictionary
for (sal_uInt32 i = end; i > begin; i--) {
sal_Int32 len = data.lenArray[i] - data.lenArray[i - 1];
if (sLen >= len) {
const sal_Unicode *dstr = data.dataArea + data.lenArray[i-1];
sal_Int32 pos = 0;
while (pos < len && dstr[pos] == str[pos]) { pos++; }
if (pos == len)
return len + 1;
}
}
return 0;
}
/*
* c-tor
*/
WordBreakCache::WordBreakCache() :
length( 0 ),
contents( NULL ),
wordboundary( NULL ),
size( 0 )
{
}
/*
* Compare two unicode string,
*/
bool WordBreakCache::equals(const sal_Unicode* str, Boundary& boundary)
{
// Different length, different string.
if (length != boundary.endPos - boundary.startPos) return false;
for (sal_Int32 i = 0; i < length; i++)
if (contents[i] != str[i + boundary.startPos]) return false;
return true;
}
/*
* Retrieve the segment containing the character at pos.
* @param pos : Position of the given character.
* @return true if CJK.
*/
bool xdictionary::seekSegment(const OUString &rText, sal_Int32 pos,
Boundary& segBoundary)
{
sal_Int32 indexUtf16;
if (segmentCachedString.pData != rText.pData) {
// Cache the passed text so we can avoid regenerating the segment if it's the same
// (pData is refcounted and assigning the OUString references it, which ensures that
// the object is the same if we get the same pointer back later)
segmentCachedString = rText;
} else {
// If pos is within the cached boundary, use that boundary
if (pos >= segmentCachedBoundary.startPos && pos <= segmentCachedBoundary.endPos) {
segBoundary.startPos = segmentCachedBoundary.startPos;
segBoundary.endPos = segmentCachedBoundary.endPos;
indexUtf16 = segmentCachedBoundary.startPos;
rText.iterateCodePoints(&indexUtf16, 1);
return segmentCachedBoundary.endPos > indexUtf16;
}
}
segBoundary.endPos = segBoundary.startPos = pos;
indexUtf16 = pos;
while (indexUtf16 > 0)
{
sal_uInt32 ch = rText.iterateCodePoints(&indexUtf16, -1);
if (u_isWhitespace(ch) || exists(ch))
segBoundary.startPos = indexUtf16;
else
break;
}
indexUtf16 = pos;
while (indexUtf16 < rText.getLength())
{
sal_uInt32 ch = rText.iterateCodePoints(&indexUtf16, 1);
if (u_isWhitespace(ch) || exists(ch))
segBoundary.endPos = indexUtf16;
else
break;
}
// Cache the calculated boundary
segmentCachedBoundary.startPos = segBoundary.startPos;
segmentCachedBoundary.endPos = segBoundary.endPos;
indexUtf16 = segBoundary.startPos;
rText.iterateCodePoints(&indexUtf16, 1);
return segBoundary.endPos > indexUtf16;
}
#define KANJA 1
#define KATAKANA 2
#define HIRAKANA 3
static sal_Int16 JapaneseCharType(sal_Unicode c)
{
if (0x3041 <= c && c <= 0x309e)
return HIRAKANA;
if ((0x30a1 <= c && c <= 0x30fe) || (0xff65 <= c && c <= 0xff9f))
return KATAKANA;
return KANJA;
}
WordBreakCache& xdictionary::getCache(const sal_Unicode *text, Boundary& wordBoundary)
{
WordBreakCache& rCache = cache[text[0] & 0x1f];
if (rCache.size != 0 && rCache.equals(text, wordBoundary))
return rCache;
sal_Int32 len = wordBoundary.endPos - wordBoundary.startPos;
if (rCache.size == 0 || len > rCache.size) {
if (rCache.size != 0) {
delete [] rCache.contents;
delete [] rCache.wordboundary;
rCache.size = len;
}
else
rCache.size = len > DEFAULT_SIZE ? len : DEFAULT_SIZE;
rCache.contents = new sal_Unicode[rCache.size + 1];
rCache.wordboundary = new sal_Int32[rCache.size + 2];
}
rCache.length = len;
memcpy(rCache.contents, text + wordBoundary.startPos, len * sizeof(sal_Unicode));
*(rCache.contents + len) = 0x0000;
// reset the wordboundary in cache
memset(rCache.wordboundary, '\0', sizeof(sal_Int32)*(len + 2));
sal_Int32 i = 0; // loop variable
while (rCache.wordboundary[i] < rCache.length) {
len = 0;
// look the continuous white space as one word and cashe it
while (u_isWhitespace((sal_uInt32)text[wordBoundary.startPos + rCache.wordboundary[i] + len]))
len ++;
if (len == 0) {
const sal_Unicode *str = text + wordBoundary.startPos + rCache.wordboundary[i];
sal_Int32 slen = rCache.length - rCache.wordboundary[i];
sal_Int16 type = 0, count = 0;
for (;len == 0 && slen > 0; str++, slen--) {
len = getLongestMatch(str, slen);
if (len == 0) {
if (!japaneseWordBreak) {
len = 1;
} else {
if (count == 0)
type = JapaneseCharType(*str);
else if (type != JapaneseCharType(*str))
break;
count++;
}
}
}
if (count)
{
rCache.wordboundary[i+1] = rCache.wordboundary[i] + count;
i++;
}
}
if (len) {
rCache.wordboundary[i+1] = rCache.wordboundary[i] + len;
i++;
}
}
rCache.wordboundary[i + 1] = rCache.length + 1;
return rCache;
}
Boundary xdictionary::previousWord(const OUString& rText, sal_Int32 anyPos, sal_Int16 wordType)
{
// looking for the first non-whitespace character from anyPos
sal_uInt32 ch = 0;
if (anyPos > 0)
rText.iterateCodePoints(&anyPos, -1);
while (anyPos > 0 && u_isWhitespace(ch)) ch = rText.iterateCodePoints(&anyPos, -1);
return getWordBoundary(rText, anyPos, wordType, true);
}
Boundary xdictionary::nextWord(const OUString& rText, sal_Int32 anyPos, sal_Int16 wordType)
{
boundary = getWordBoundary(rText, anyPos, wordType, true);
anyPos = boundary.endPos;
const sal_Int32 nLen = rText.getLength();
if (anyPos < nLen) {
// looknig for the first non-whitespace character from anyPos
sal_uInt32 ch = rText.iterateCodePoints(&anyPos, 1);
while (u_isWhitespace(ch) && (anyPos < nLen)) ch=rText.iterateCodePoints(&anyPos, 1);
if (anyPos > 0)
rText.iterateCodePoints(&anyPos, -1);
}
return getWordBoundary(rText, anyPos, wordType, true);
}
Boundary xdictionary::getWordBoundary(const OUString& rText, sal_Int32 anyPos, sal_Int16 wordType, bool bDirection)
{
const sal_Unicode *text=rText.getStr();
sal_Int32 len=rText.getLength();
if (anyPos >= len || anyPos < 0) {
boundary.startPos = boundary.endPos = anyPos < 0 ? 0 : len;
} else if (seekSegment(rText, anyPos, boundary)) { // character in dict
WordBreakCache& aCache = getCache(text, boundary);
sal_Int32 i = 0;
while (aCache.wordboundary[i] <= anyPos - boundary.startPos) i++;
sal_Int32 startPos = aCache.wordboundary[i - 1];
// if bDirection is false
if (!bDirection && startPos > 0 && startPos == (anyPos - boundary.startPos))
{
sal_Int32 indexUtf16 = anyPos-1;
sal_uInt32 ch = rText.iterateCodePoints(&indexUtf16, 1);
if (u_isWhitespace(ch))
i--;
}
boundary.endPos = boundary.startPos;
boundary.endPos += aCache.wordboundary[i];
boundary.startPos += aCache.wordboundary[i-1];
} else {
boundary.startPos = anyPos;
if (anyPos < len) rText.iterateCodePoints(&anyPos, 1);
boundary.endPos = anyPos < len ? anyPos : len;
}
if (wordType == WordType::WORD_COUNT) {
// skip punctuation for word count.
while (boundary.endPos < len)
{
sal_Int32 indexUtf16 = boundary.endPos;
if (u_ispunct(rText.iterateCodePoints(&indexUtf16, 1)))
boundary.endPos = indexUtf16;
else
break;
}
}
return boundary;
}
} } } }
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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