i18npool/source/textconversion/textconversion_ko.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <textconversion.hxx>
  21 #include <com/sun/star/i18n/TextConversionType.hpp>
  22 #include <com/sun/star/i18n/TextConversionOption.hpp>
  23 #include <com/sun/star/lang/NoSupportException.hpp>
  24 #include <com/sun/star/linguistic2/ConversionDirection.hpp>
  25 #include <com/sun/star/linguistic2/ConversionDictionaryType.hpp>
  26 #include <com/sun/star/linguistic2/ConversionDictionaryList.hpp>
  27 #include <comphelper/sequence.hxx>
  28 #include <rtl/ustrbuf.hxx>
  29 #include <unicode/uchar.h>
  30 #include <memory>
  31
  32 using namespace com::sun::star::lang;
  33 using namespace com::sun::star::i18n;
  34 using namespace com::sun::star::linguistic2;
  35 using namespace com::sun::star::uno;
  36
  37
  38 namespace i18npool {
  39
  40 #define SCRIPT_OTHERS   0
  41 #define SCRIPT_HANJA    1
  42 #define SCRIPT_HANGUL   2
  43
  44 TextConversion_ko::TextConversion_ko( const Reference < XComponentContext >& xContext )
  45     : TextConversionService("com.sun.star.i18n.TextConversion_ko")
  46 {
  47     Reference < XInterface > xI = xContext->getServiceManager()->createInstanceWithContext(
  48         u"com.sun.star.i18n.ConversionDictionary_ko"_ustr, xContext);
  49
  50     if ( xI.is() )
  51         xCD.set( xI, UNO_QUERY );
  52
  53     xCDL = ConversionDictionaryList::create(xContext);
  54
  55     maxLeftLength = maxRightLength = 1;
  56
  57     // get maximum length of word in dictionary
  58     if (xCDL.is()) {
  59         Locale loc(u"ko"_ustr, u"KR"_ustr, OUString());
  60         maxLeftLength = xCDL->queryMaxCharCount(loc,
  61                         ConversionDictionaryType::HANGUL_HANJA,
  62                         ConversionDirection_FROM_LEFT);
  63         maxRightLength = xCDL->queryMaxCharCount(loc,
  64                         ConversionDictionaryType::HANGUL_HANJA,
  65                         ConversionDirection_FROM_RIGHT);
  66         if (xCD.is()) {
  67             sal_Int32 tmp = xCD->getMaxCharCount(ConversionDirection_FROM_LEFT);
  68             if (tmp > maxLeftLength)
  69                 maxLeftLength = tmp;
  70             tmp = xCD->getMaxCharCount(ConversionDirection_FROM_RIGHT);
  71             if (tmp > maxRightLength)
  72                 maxRightLength = tmp;
  73         }
  74     } else if (xCD.is()) {
  75         maxLeftLength = xCD->getMaxCharCount(ConversionDirection_FROM_LEFT);
  76         maxRightLength = xCD->getMaxCharCount(ConversionDirection_FROM_RIGHT);
  77     }
  78 }
  79
  80 static sal_Int16 checkScriptType(sal_Unicode c)
  81 {
  82     struct UBlock2Script {
  83         UBlockCode from;
  84         UBlockCode to;
  85         sal_Int16 script;
  86     };
  87
  88     static const UBlock2Script scriptList[] = {
  89         {UBLOCK_HANGUL_JAMO, UBLOCK_HANGUL_JAMO, SCRIPT_HANGUL},
  90         {UBLOCK_CJK_RADICALS_SUPPLEMENT, UBLOCK_BOPOMOFO, SCRIPT_HANJA},
  91         {UBLOCK_HANGUL_COMPATIBILITY_JAMO, UBLOCK_HANGUL_COMPATIBILITY_JAMO, SCRIPT_HANGUL},
  92         {UBLOCK_KANBUN, UBLOCK_YI_RADICALS, SCRIPT_HANJA},
  93         {UBLOCK_HANGUL_SYLLABLES, UBLOCK_HANGUL_SYLLABLES, SCRIPT_HANGUL},
  94         {UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS, UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS, SCRIPT_HANJA},
  95         {UBLOCK_COMBINING_HALF_MARKS, UBLOCK_SMALL_FORM_VARIANTS, SCRIPT_HANJA},
  96         {UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS, UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS, SCRIPT_HANJA},
  97     };
  98
  99     UBlockCode block=ublock_getCode(static_cast<sal_uInt32>(c));
 100     size_t i;
 101     for ( i = 0; i < SAL_N_ELEMENTS(scriptList); i++) {
 102         if (block <= scriptList[i].to) break;
 103     }
 104     return (i < SAL_N_ELEMENTS(scriptList) && block >= scriptList[i].from) ? scriptList[i].script : SCRIPT_OTHERS;
 105 }
 106
 107 #ifdef DISABLE_DYNLOADING
 108 #endif
 109
 110 Sequence< OUString >
 111 TextConversion_ko::getCharConversions(std::u16string_view aText, sal_Int32 nStartPos, sal_Int32 nLength, bool toHanja)
 112 {
 113     sal_Unicode ch;
 114     Sequence< OUString > output;
 115     if (toHanja)
 116     {
 117         ch = aText[nStartPos];
 118         const Hangul_Index *Hangul_ko = getHangul2HanjaIndex();
 119         sal_Int16 top =  getHangul2HanjaIndexCount();
 120         --top;
 121         sal_Int16 bottom = 0;
 122
 123         while (bottom <= top) {
 124             sal_Int16 current = (top + bottom) / 2;
 125             sal_Unicode current_ch = Hangul_ko[current].code;
 126             if (ch < current_ch)
 127                 top = current - 1;
 128             else if (ch > current_ch)
 129                 bottom = current + 1;
 130             else {
 131                 const sal_Unicode *ptr = getHangul2HanjaData() + Hangul_ko[current].address;
 132                 sal_Int16 count = Hangul_ko[current].count;
 133                 output.realloc(count);
 134                 auto poutput = output.getArray();
 135                 for (sal_Int16 i = 0; i < count; i++)
 136                     poutput[i] = OUString(ptr + i, 1);
 137                 break;
 138             }
 139         }
 140     }
 141     else if (!toHanja)
 142     {
 143         std::unique_ptr<sal_Unicode[]> newStr(new sal_Unicode[nLength+1]);
 144         sal_Int32 count = 0;
 145         while (count < nLength)
 146         {
 147             ch = aText[nStartPos + count];
 148             sal_Unicode address = getHanja2HangulIndex()[ch>>8];
 149             if (address != 0xFFFF)
 150                 address = getHanja2HangulData()[address + (ch & 0xFF)];
 151
 152             if (address != 0xFFFF)
 153                 newStr[count++] = address;
 154             else
 155                 break;
 156         }
 157         if (count > 0)
 158         {
 159             output = { OUString(newStr.get(), count) };
 160         }
 161     }
 162     return output;
 163 }
 164
 165 static Sequence< OUString >& operator += (Sequence< OUString > &rSeq1, const Sequence< OUString > &rSeq2 )
 166 {
 167     if (! rSeq1.hasElements() && rSeq2.hasElements())
 168         rSeq1 = rSeq2;
 169     else if (rSeq2.hasElements())
 170         rSeq1 = comphelper::combineSequences(rSeq1, rSeq2);
 171
 172     return rSeq1;
 173 }
 174
 175 TextConversionResult SAL_CALL
 176 TextConversion_ko::getConversions( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 177     const Locale& aLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions)
 178 {
 179     TextConversionResult result;
 180     Sequence <OUString> candidates;
 181     result.Boundary.startPos = result.Boundary.endPos = 0;
 182
 183     // do conversion only when there are right conversion type and dictionary services.
 184     if (nConversionType != TextConversionType::TO_HANGUL &&
 185         nConversionType != TextConversionType::TO_HANJA)
 186         throw NoSupportException(); // Conversion type is not supported in this service.
 187     sal_Int32 start, end, length = aText.getLength() - nStartPos;
 188
 189     if (length < 0 || nStartPos < 0)
 190         length = 0;
 191     else if (length > nLength)
 192         length = nLength;
 193
 194     sal_Int16 scriptType = SCRIPT_OTHERS;
 195     sal_Int32 len = 1;
 196     bool toHanja = (nConversionType == TextConversionType::TO_HANJA);
 197     // FROM_LEFT:  Hangul -> Hanja
 198     // FROM_RIGHT: Hanja  -> Hangul
 199     ConversionDirection eDirection = toHanja ? ConversionDirection_FROM_LEFT : ConversionDirection_FROM_RIGHT;
 200     sal_Int32 maxLength = toHanja ? maxLeftLength : maxRightLength;
 201     if (maxLength == 0) maxLength = 1;
 202
 203     // search for a max length of convertible text
 204     for (start = 0, end = 0; start < length; start++) {
 205         if (end <= start) {
 206             scriptType = checkScriptType(aText[nStartPos + start]);
 207             if (nConversionType == TextConversionType::TO_HANJA) {
 208                 if (scriptType != SCRIPT_HANGUL) // skip non-Hangul characters
 209                     continue;
 210             } else {
 211                 if (scriptType != SCRIPT_HANJA) // skip non-Hanja characters
 212                     continue;
 213             }
 214             end = start + 1;
 215         }
 216         if (nConversionOptions & TextConversionOption::CHARACTER_BY_CHARACTER) {
 217             result.Candidates = getCharConversions(aText, nStartPos + start, len, toHanja); // char2char conversion
 218         } else {
 219             for (; end < length && end - start < maxLength; end++)
 220                 if (checkScriptType(aText[nStartPos + end]) != scriptType)
 221                     break;
 222
 223             for (len = end - start; len > 0; len--) {
 224                 if (len > 1) {
 225                     try {
 226                         if (xCDL.is())
 227                             result.Candidates = xCDL->queryConversions(aText, start + nStartPos, len,
 228                                 aLocale, ConversionDictionaryType::HANGUL_HANJA, eDirection, nConversionOptions); // user dictionary
 229                     }
 230                     catch ( NoSupportException & ) {
 231                         // clear reference (when there is no user dictionary) in order
 232                         // to not always have to catch this exception again
 233                         // in further calls. (save time)
 234                         xCDL = nullptr;
 235                     }
 236                     catch (...) {
 237                         // catch all other exceptions to allow
 238                         // querying the system dictionary in the next line
 239                     }
 240                     if (xCD.is() && toHanja) { // System dictionary would not do Hanja_to_Hangul conversion.
 241                         candidates = xCD->getConversions(aText, start + nStartPos, len, eDirection, nConversionOptions);
 242                         result.Candidates += candidates;
 243                     }
 244                 } else if (! toHanja) { // do whole word character 2 character conversion for Hanja to Hangul conversion
 245                     result.Candidates = getCharConversions(aText, nStartPos + start, length - start, toHanja);
 246                     if (result.Candidates.hasElements())
 247                         len = result.Candidates[0].getLength();
 248                 }
 249                 if (result.Candidates.hasElements())
 250                     break;
 251             }
 252         }
 253         // found match
 254         if (result.Candidates.hasElements()) {
 255             result.Boundary.startPos = start + nStartPos;
 256             result.Boundary.endPos = start + len + nStartPos;
 257             return result;
 258         }
 259     }
 260
 261     return result;
 262 }
 263
 264 OUString SAL_CALL
 265 TextConversion_ko::getConversion( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 266     const Locale& aLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions)
 267 {
 268     sal_Int32 length = aText.getLength() - nStartPos;
 269
 270     if (length <= 0 || nStartPos < 0)
 271         return OUString();
 272     else if (length > nLength)
 273         length = nLength;
 274
 275     OUStringBuffer aBuf(length + 1);
 276     TextConversionResult result;
 277     const sal_Unicode *str = aText.getStr();
 278
 279     for (sal_Int32 start = nStartPos; length + nStartPos > start; start = result.Boundary.endPos) {
 280
 281         result = getConversions(aText, start, length + nStartPos - start, aLocale, nConversionType, nConversionOptions);
 282
 283         if (result.Boundary.endPos > 0) {
 284             if (result.Boundary.startPos > start)
 285                 aBuf.append(str + start, result.Boundary.startPos - start); // append skip portion
 286             aBuf.append(result.Candidates[0]); // append converted portion
 287         } else {
 288             aBuf.append(str + start, length + nStartPos - start); // append last portion
 289             break;
 290         }
 291     }
 292
 293     return aBuf.makeStringAndClear();
 294 }
 295
 296 OUString SAL_CALL
 297 TextConversion_ko::getConversionWithOffset( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 298     const Locale& rLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions, Sequence<sal_Int32>& offset)
 299 {
 300     offset.realloc(0);
 301     return getConversion(aText, nStartPos, nLength, rLocale, nConversionType, nConversionOptions);
 302 }
 303
 304 sal_Bool SAL_CALL
 305 TextConversion_ko::interactiveConversion( const Locale& /*rLocale*/, sal_Int16 /*nTextConversionType*/, sal_Int32 /*nTextConversionOptions*/ )
 306 {
 307     return true;
 308 }
 309
 310 }
 311
 312 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */