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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   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   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 <assert.h>
  21 #include <textconversion.hxx>
  22 #include <com/sun/star/i18n/TextConversionType.hpp>
  23 #include <com/sun/star/i18n/TextConversionOption.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 <rtl/ustrbuf.hxx>
  28 #include <unicode/uchar.h>
  29 #include <memory>
  30
  31 using namespace com::sun::star::lang;
  32 using namespace com::sun::star::i18n;
  33 using namespace com::sun::star::linguistic2;
  34 using namespace com::sun::star::uno;
  35
  36
  37 namespace com { namespace sun { namespace star { namespace i18n {
  38
  39 #define SCRIPT_OTHERS   0
  40 #define SCRIPT_HANJA    1
  41 #define SCRIPT_HANGUL   2
  42
  43 TextConversion_ko::TextConversion_ko( const Reference < XComponentContext >& xContext )
  44     : TextConversionService("com.sun.star.i18n.TextConversion_ko")
  45 {
  46     Reference < XInterface > xI;
  47
  48     xI = xContext->getServiceManager()->createInstanceWithContext(
  49         "com.sun.star.i18n.ConversionDictionary_ko", xContext);
  50
  51     if ( xI.is() )
  52         xCD.set( xI, UNO_QUERY );
  53
  54     xCDL = ConversionDictionaryList::create(xContext);
  55
  56     maxLeftLength = maxRightLength = 1;
  57
  58     // get maximum length of word in dictionary
  59     if (xCDL.is()) {
  60         Locale loc(OUString("ko"),
  61                     OUString("KR"),
  62                     OUString());
  63         maxLeftLength = xCDL->queryMaxCharCount(loc,
  64                         ConversionDictionaryType::HANGUL_HANJA,
  65                         ConversionDirection_FROM_LEFT);
  66         maxRightLength = xCDL->queryMaxCharCount(loc,
  67                         ConversionDictionaryType::HANGUL_HANJA,
  68                         ConversionDirection_FROM_RIGHT);
  69         if (xCD.is()) {
  70             sal_Int32 tmp = xCD->getMaxCharCount(ConversionDirection_FROM_LEFT);
  71             if (tmp > maxLeftLength)
  72                 maxLeftLength = tmp;
  73             tmp = xCD->getMaxCharCount(ConversionDirection_FROM_RIGHT);
  74             if (tmp > maxRightLength)
  75                 maxRightLength = tmp;
  76         }
  77     } else if (xCD.is()) {
  78         maxLeftLength = xCD->getMaxCharCount(ConversionDirection_FROM_LEFT);
  79         maxRightLength = xCD->getMaxCharCount(ConversionDirection_FROM_RIGHT);
  80     }
  81 }
  82
  83 sal_Int16 SAL_CALL checkScriptType(sal_Unicode c)
  84 {
  85     typedef struct {
  86         UBlockCode from;
  87         UBlockCode to;
  88         sal_Int16 script;
  89     } UBlock2Script;
  90
  91     static UBlock2Script scriptList[] = {
  92         {UBLOCK_HANGUL_JAMO, UBLOCK_HANGUL_JAMO, SCRIPT_HANGUL},
  93         {UBLOCK_CJK_RADICALS_SUPPLEMENT, UBLOCK_BOPOMOFO, SCRIPT_HANJA},
  94         {UBLOCK_HANGUL_COMPATIBILITY_JAMO, UBLOCK_HANGUL_COMPATIBILITY_JAMO, SCRIPT_HANGUL},
  95         {UBLOCK_KANBUN, UBLOCK_YI_RADICALS, SCRIPT_HANJA},
  96         {UBLOCK_HANGUL_SYLLABLES, UBLOCK_HANGUL_SYLLABLES, SCRIPT_HANGUL},
  97         {UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS, UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS, SCRIPT_HANJA},
  98         {UBLOCK_COMBINING_HALF_MARKS, UBLOCK_SMALL_FORM_VARIANTS, SCRIPT_HANJA},
  99         {UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS, UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS, SCRIPT_HANJA},
 100     };
 101
 102 #define scriptListCount sizeof (scriptList) / sizeof (UBlock2Script)
 103
 104     UBlockCode block=ublock_getCode((sal_uInt32) c);
 105     sal_uInt16 i;
 106     for ( i = 0; i < scriptListCount; i++) {
 107         if (block <= scriptList[i].to) break;
 108     }
 109     return (i < scriptListCount && block >= scriptList[i].from) ? scriptList[i].script : SCRIPT_OTHERS;
 110 }
 111
 112 #ifdef DISABLE_DYNLOADING
 113
 114 extern "C" {
 115
 116 const sal_Unicode* getHangul2HanjaData();
 117 const Hangul_Index* getHangul2HanjaIndex();
 118 sal_Int16 getHangul2HanjaIndexCount();
 119 const sal_uInt16* getHanja2HangulIndex();
 120 const sal_Unicode* getHanja2HangulData();
 121
 122 }
 123
 124 #endif
 125
 126 Sequence< OUString > SAL_CALL
 127 TextConversion_ko::getCharConversions(const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength, bool toHanja)
 128 {
 129     sal_Unicode ch;
 130     Sequence< OUString > output;
 131 #ifndef DISABLE_DYNLOADING
 132     const sal_Unicode* (*getHangul2HanjaData)() = reinterpret_cast<const sal_Unicode* (*)()>(getFunctionBySymbol("getHangul2HanjaData"));
 133     const Hangul_Index* (*getHangul2HanjaIndex)() = reinterpret_cast<const Hangul_Index* (*)()>(getFunctionBySymbol("getHangul2HanjaIndex"));
 134     sal_Int16 (*getHangul2HanjaIndexCount)() = reinterpret_cast<sal_Int16 (*)()>(getFunctionBySymbol("getHangul2HanjaIndexCount"));
 135     const sal_uInt16* (*getHanja2HangulIndex)() = reinterpret_cast<const sal_uInt16* (*)()>(getFunctionBySymbol("getHanja2HangulIndex"));
 136     const sal_Unicode* (*getHanja2HangulData)() = reinterpret_cast<const sal_Unicode* (*)()>(getFunctionBySymbol("getHanja2HangulData"));
 137 #else
 138 #pragma GCC diagnostic push
 139 #ifdef __clang__
 140 #pragma GCC diagnostic warning "-Wbool-conversions"
 141 #else
 142 #pragma GCC diagnostic warning "-Waddress"
 143 #endif
 144 #endif
 145     if (toHanja && getHangul2HanjaIndex && getHangul2HanjaIndexCount && getHangul2HanjaData) {
 146         ch = aText[nStartPos];
 147         const Hangul_Index *Hangul_ko = getHangul2HanjaIndex();
 148         sal_Int16 top =  getHangul2HanjaIndexCount();
 149         --top;
 150         sal_Int16 bottom = 0;
 151
 152         while (bottom <= top) {
 153             sal_Int16 current = (top + bottom) / 2;
 154             sal_Unicode current_ch = Hangul_ko[current].code;
 155             if (ch < current_ch)
 156                 top = current - 1;
 157             else if (ch > current_ch)
 158                 bottom = current + 1;
 159             else {
 160                 const sal_Unicode *ptr = getHangul2HanjaData() + Hangul_ko[current].address;
 161                 sal_Int16 count = Hangul_ko[current].count;
 162                 output.realloc(count);
 163                 for (sal_Int16 i = 0; i < count; i++)
 164                     output[i] = OUString(ptr + i, 1);
 165                 break;
 166             }
 167         }
 168     } else if (! toHanja && getHanja2HangulIndex && getHanja2HangulData)
 169     {
 170         std::unique_ptr<sal_Unicode[]> newStr(new sal_Unicode[nLength+1]);
 171         sal_Int32 count = 0;
 172         while (count < nLength)
 173         {
 174             ch = aText[nStartPos + count];
 175             sal_Unicode address = getHanja2HangulIndex()[ch>>8];
 176             if (address != 0xFFFF)
 177                 address = getHanja2HangulData()[address + (ch & 0xFF)];
 178
 179             if (address != 0xFFFF)
 180                 newStr[count++] = address;
 181             else
 182                 break;
 183         }
 184         if (count > 0)
 185         {
 186             output.realloc(1);
 187             output[0] = OUString(newStr.get(), count);
 188         }
 189     }
 190 #if defined(DISABLE_DYNLOADING)
 191 #pragma GCC diagnostic pop
 192 #endif
 193     return output;
 194 }
 195
 196 static Sequence< OUString >& operator += (Sequence< OUString > &rSeq1, Sequence< OUString > &rSeq2 )
 197 {
 198     if (! rSeq1.hasElements() && rSeq2.hasElements())
 199         rSeq1 = rSeq2;
 200     else if (rSeq2.hasElements()) {
 201         sal_Int32 i, j, k, l;
 202         k = l = rSeq1.getLength();
 203         rSeq1.realloc(l + rSeq2.getLength());
 204
 205         for (i = 0; i < rSeq2.getLength(); i++) {
 206             for (j = 0; j < l; j++)
 207                 if (rSeq1[j] == rSeq2[i])
 208                     break;
 209             if (j == l)
 210                 rSeq1[k++] = rSeq2[i];
 211         }
 212         if (rSeq1.getLength() > k)
 213             rSeq1.realloc(k);
 214     }
 215     return rSeq1;
 216 }
 217
 218 TextConversionResult SAL_CALL
 219 TextConversion_ko::getConversions( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 220     const Locale& aLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions)
 221     throw(  RuntimeException, IllegalArgumentException, NoSupportException, std::exception )
 222 {
 223     TextConversionResult result;
 224     Sequence <OUString> candidates;
 225     result.Boundary.startPos = result.Boundary.endPos = 0;
 226
 227     // do conversion only when there are right conversion type and dictionary services.
 228     if (nConversionType == TextConversionType::TO_HANGUL ||
 229             nConversionType == TextConversionType::TO_HANJA) {
 230         sal_Int32 start, end, length = aText.getLength() - nStartPos;
 231
 232         if (length < 0 || nStartPos < 0)
 233             length = 0;
 234         else if (length > nLength)
 235             length = nLength;
 236
 237         sal_Int16 scriptType = SCRIPT_OTHERS;
 238         sal_Int32 len = 1;
 239         bool toHanja = (nConversionType == TextConversionType::TO_HANJA);
 240         // FROM_LEFT:  Hangul -> Hanja
 241         // FROM_RIGHT: Hanja  -> Hangul
 242         ConversionDirection eDirection = toHanja ? ConversionDirection_FROM_LEFT : ConversionDirection_FROM_RIGHT;
 243         sal_Int32 maxLength = toHanja ? maxLeftLength : maxRightLength;
 244         if (maxLength == 0) maxLength = 1;
 245
 246         // search for a max length of convertible text
 247         for (start = 0, end = 0; start < length; start++) {
 248             if (end <= start) {
 249                 scriptType = checkScriptType(aText[nStartPos + start]);
 250                 if (nConversionType == TextConversionType::TO_HANJA) {
 251                     if (scriptType != SCRIPT_HANGUL) // skip non-Hangul characters
 252                         continue;
 253                 } else {
 254                     if (scriptType != SCRIPT_HANJA) // skip non-Hanja characters
 255                         continue;
 256                 }
 257                 end = start + 1;
 258             }
 259             if (nConversionOptions & TextConversionOption::CHARACTER_BY_CHARACTER) {
 260                 result.Candidates = getCharConversions(aText, nStartPos + start, len, toHanja); // char2char conversion
 261             } else {
 262                 for (; end < length && end - start < maxLength; end++)
 263                     if (checkScriptType(aText[nStartPos + end]) != scriptType)
 264                         break;
 265
 266                 for (len = end - start; len > 0; len--) {
 267                     if (len > 1) {
 268                         try {
 269                             if (xCDL.is())
 270                                 result.Candidates = xCDL->queryConversions(aText, start + nStartPos, len,
 271                                     aLocale, ConversionDictionaryType::HANGUL_HANJA, eDirection, nConversionOptions); // user dictionary
 272                         }
 273                         catch ( NoSupportException & ) {
 274                             // clear reference (when there is no user dictionary) in order
 275                             // to not always have to catch this exception again
 276                             // in further calls. (save time)
 277                             xCDL = nullptr;
 278                         }
 279                         catch (...) {
 280                             // catch all other exceptions to allow
 281                             // querying the system dictionary in the next line
 282                         }
 283                         if (xCD.is() && toHanja) { // System dictionary would not do Hanja_to_Hangul conversion.
 284                             candidates = xCD->getConversions(aText, start + nStartPos, len, eDirection, nConversionOptions);
 285                             result.Candidates += candidates;
 286                         }
 287                     } else if (! toHanja) { // do whole word character 2 character conversion for Hanja to Hangul conversion
 288                         result.Candidates = getCharConversions(aText, nStartPos + start, length - start, toHanja);
 289                         if (result.Candidates.hasElements())
 290                             len = result.Candidates[0].getLength();
 291                     }
 292                     if (result.Candidates.hasElements())
 293                         break;
 294                 }
 295             }
 296             // found match
 297             if (result.Candidates.hasElements()) {
 298                 result.Boundary.startPos = start + nStartPos;
 299                 result.Boundary.endPos = start + len + nStartPos;
 300                 return result;
 301             }
 302         }
 303     } else
 304         throw NoSupportException(); // Conversion type is not supported in this service.
 305     return result;
 306 }
 307
 308 OUString SAL_CALL
 309 TextConversion_ko::getConversion( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 310     const Locale& aLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions)
 311     throw(  RuntimeException, IllegalArgumentException, NoSupportException, std::exception )
 312 {
 313     sal_Int32 length = aText.getLength() - nStartPos;
 314
 315     if (length <= 0 || nStartPos < 0)
 316         return OUString();
 317     else if (length > nLength)
 318         length = nLength;
 319
 320     OUStringBuffer aBuf(length + 1);
 321     TextConversionResult result;
 322     const sal_Unicode *str = aText.getStr();
 323
 324     for (sal_Int32 start = nStartPos; length + nStartPos > start; start = result.Boundary.endPos) {
 325
 326         result = getConversions(aText, start, length + nStartPos - start, aLocale, nConversionType, nConversionOptions);
 327
 328         if (result.Boundary.endPos > 0) {
 329             if (result.Boundary.startPos > start)
 330                 aBuf.append(str + start, result.Boundary.startPos - start); // append skip portion
 331             aBuf.append(result.Candidates[0]); // append converted portion
 332         } else {
 333             if (length + nStartPos > start)
 334                 aBuf.append(str + start, length + nStartPos - start); // append last portion
 335             break;
 336         }
 337     }
 338
 339     return aBuf.makeStringAndClear();
 340 }
 341
 342 OUString SAL_CALL
 343 TextConversion_ko::getConversionWithOffset( const OUString& aText, sal_Int32 nStartPos, sal_Int32 nLength,
 344     const Locale& rLocale, sal_Int16 nConversionType, sal_Int32 nConversionOptions, Sequence<sal_Int32>& offset)
 345     throw(  RuntimeException, IllegalArgumentException, NoSupportException, std::exception )
 346 {
 347     offset.realloc(0);
 348     return getConversion(aText, nStartPos, nLength, rLocale, nConversionType, nConversionOptions);
 349 }
 350
 351 sal_Bool SAL_CALL
 352 TextConversion_ko::interactiveConversion( const Locale& /*rLocale*/, sal_Int16 /*nTextConversionType*/, sal_Int32 /*nTextConversionOptions*/ )
 353     throw(  RuntimeException, IllegalArgumentException, NoSupportException, std::exception )
 354 {
 355     return true;
 356 }
 357
 358 } } } }
 359
 360 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */