i18nutil/source/utility/widthfolding.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   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 // prevent internal compiler error with MSVC6SP3
  21 #include <utility>
  22 #include <i18nutil/widthfolding.hxx>
  23 #include <comphelper/string.hxx>
  24 #include "widthfolding_data.h"
  25
  26 using namespace com::sun::star::uno;
  27
  28
  29 namespace com { namespace sun { namespace star { namespace i18n {
  30
  31 sal_Unicode widthfolding::decompose_ja_voiced_sound_marksChar2Char (sal_Unicode inChar)
  32 {
  33     if (0x30a0 <= inChar && inChar <= 0x30ff) {
  34       sal_Int16 i = inChar - 0x3040;
  35       if (decomposition_table[i].decomposited_character_1)
  36           return 0xFFFF;
  37     }
  38     return inChar;
  39 }
  40
  41 /**
  42  * Decompose Japanese specific voiced and semi-voiced sound marks.
  43  */
  44 OUString widthfolding::decompose_ja_voiced_sound_marks (const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >& offset, bool useOffset )
  45 {
  46   // Create a string buffer which can hold nCount * 2 + 1 characters.
  47   // Its size may become double of nCount.
  48   // The reference count is 1 now.
  49   rtl_uString * newStr = rtl_uString_alloc(nCount * 2);
  50
  51   sal_Int32 *p = NULL;
  52   sal_Int32 position = 0;
  53   if (useOffset) {
  54       // Allocate double of nCount length to offset argument.
  55       offset.realloc( nCount * 2 );
  56       p = offset.getArray();
  57       position = startPos;
  58   }
  59
  60   // Prepare pointers of unicode character arrays.
  61   const sal_Unicode* src = inStr.getStr() + startPos;
  62   sal_Unicode* dst = newStr->buffer;
  63
  64   // Decomposition: GA --> KA + voice-mark
  65   while (nCount -- > 0) {
  66     sal_Unicode c = *src++;
  67     // see http://charts.unicode.org/Web/U3040.html Hiragana (U+3040..U+309F)
  68     // see http://charts.unicode.org/Web/U30A0.html Katakana (U+30A0..U+30FF)
  69     // Hiragana is not applied to decomposition.
  70     // Only Katakana is applied to decomposition
  71     if (0x30a0 <= c && c <= 0x30ff) {
  72       int i = int(c - 0x3040);
  73       sal_Unicode first = decomposition_table[i].decomposited_character_1;
  74       if (first != 0x0000) {
  75     *dst ++ = first;
  76     *dst ++ = decomposition_table[i].decomposited_character_2; // second
  77         if (useOffset) {
  78             *p ++ = position;
  79             *p ++ = position ++;
  80         }
  81     continue;
  82       }
  83     }
  84     *dst ++ = c;
  85     if (useOffset)
  86         *p ++ = position ++;
  87   }
  88   *dst = (sal_Unicode) 0;
  89
  90   newStr->length = sal_Int32(dst - newStr->buffer);
  91   if (useOffset)
  92       offset.realloc(newStr->length);
  93   return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
  94 }
  95
  96 oneToOneMapping& widthfolding::getfull2halfTable()
  97 {
  98     static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_NORMAL);
  99     table.makeIndex();
 100     return table;
 101 }
 102
 103 /**
 104  * Compose Japanese specific voiced and semi-voiced sound marks.
 105  */
 106 OUString widthfolding::compose_ja_voiced_sound_marks (const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >& offset, bool useOffset, sal_Int32 nFlags )
 107 {
 108   // Create a string buffer which can hold nCount + 1 characters.
 109   // Its size may become equal to nCount or smaller.
 110   // The reference count is 1 now.
 111   rtl_uString * newStr = rtl_uString_alloc(nCount);
 112
 113   // Prepare pointers of unicode character arrays.
 114   const sal_Unicode* src = inStr.getStr() + startPos;
 115   sal_Unicode* dst = newStr->buffer;
 116
 117   // This conversion algorithm requires at least one character.
 118  if (nCount > 0) {
 119
 120   // .. .. KA         VOICE .. ..
 121   //       ^          ^
 122   //       previousChar   currentChar
 123   //       ^
 124   //       position
 125   //
 126   // will be converted to
 127   // .. .. GA       .. ..
 128
 129   sal_Int32 *p = NULL;
 130   sal_Int32 position = 0;
 131   if (useOffset) {
 132       // Allocate nCount length to offset argument.
 133       offset.realloc( nCount );
 134       p = offset.getArray();
 135       position = startPos;
 136   }
 137
 138   //
 139   sal_Unicode previousChar = *src ++;
 140   sal_Unicode currentChar;
 141
 142   // Composition: KA + voice-mark --> GA
 143   while (-- nCount > 0) {
 144     currentChar = *src ++;
 145     // see http://charts.unicode.org/Web/U3040.html Hiragana (U+3040..U+309F)
 146     // see http://charts.unicode.org/Web/U30A0.html Katakana (U+30A0..U+30FF)
 147     // 0x3099 COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK
 148     // 0x309a COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
 149     // 0x309b KATAKANA-HIRAGANA VOICED SOUND MARK
 150     // 0x309c KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
 151     int j = currentChar - 0x3099; // 0x3099, 0x309a, 0x309b, 0x309c ?
 152
 153     if (2 <= j && j <= 3) // 0x309b or 0x309c
 154         j -= 2;
 155
 156     if (0 <= j && j <= 1) {
 157       // 0 addresses a code point regarding 0x3099 or 0x309b (voiced sound mark),
 158       // 1 is 0x309a or 0x309c (semi-voiced sound mark)
 159       int i = int(previousChar - 0x3040); // i acts as an index of array
 160       bool bCompose = false;
 161
 162       if (0 <= i && i <= (0x30ff - 0x3040) && composition_table[i][j])
 163         bCompose = true;
 164
 165       // not to use combined KATAKANA LETTER VU
 166       if ( previousChar == 0x30a6 && (nFlags & WIDTHFOLDNIG_DONT_USE_COMBINED_VU) )
 167         bCompose = false;
 168
 169       if( bCompose ){
 170         if (useOffset) {
 171             position ++;
 172             *p ++ = position ++;
 173         }
 174     *dst ++ =  composition_table[i][j];
 175     previousChar = *src ++;
 176     nCount --;
 177     continue;
 178       }
 179     }
 180     if (useOffset)
 181         *p ++ = position ++;
 182     *dst ++ = previousChar;
 183     previousChar = currentChar;
 184   }
 185
 186   if (nCount == 0) {
 187     if (useOffset)
 188         *p = position;
 189     *dst ++ = previousChar;
 190   }
 191
 192   *dst = (sal_Unicode) 0;
 193
 194   newStr->length = sal_Int32(dst - newStr->buffer);
 195  }
 196   if (useOffset)
 197       offset.realloc(newStr->length);
 198   return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
 199 }
 200
 201 oneToOneMapping& widthfolding::gethalf2fullTable()
 202 {
 203     static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_NORMAL);
 204     table.makeIndex();
 205     return table;
 206 }
 207
 208 sal_Unicode widthfolding::getCompositionChar(sal_Unicode c1, sal_Unicode c2)
 209 {
 210     return composition_table[c1 - 0x3040][c2 - 0x3099];
 211 }
 212
 213
 214 oneToOneMapping& widthfolding::getfull2halfTableForASC()
 215 {
 216     static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_ASC_FUNCTION);
 217     table.makeIndex();
 218
 219     // bluedwarf: dirty hack!
 220     // There is an exception. Additional conversion is required following:
 221     //  0xFFE5 (FULLWIDTH YEN SIGN)  --> 0x005C (REVERSE SOLIDUS)
 222     //
 223     //  See the following page for detail:
 224     // http://wiki.openoffice.org/wiki/Calc/Features/JIS_and_ASC_functions
 225     int i, j;
 226     int n = sizeof(full2halfASCException) / sizeof(UnicodePairWithFlag);
 227     for( i = 0; i < n; i++ )
 228     {
 229         const int high = (full2halfASCException[i].first >> 8) & 0xFF;
 230         const int low  = (full2halfASCException[i].first)      & 0xFF;
 231
 232         if( !table.mpIndex[high] )
 233         {
 234             table.mpIndex[high] = new UnicodePairWithFlag*[256];
 235
 236             for( j = 0; j < 256; j++ )
 237                 table.mpIndex[high][j] = NULL;
 238         }
 239         table.mpIndex[high][low] = &full2halfASCException[i];
 240     }
 241
 242     return table;
 243 }
 244
 245 oneToOneMapping& widthfolding::gethalf2fullTableForJIS()
 246 {
 247     static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_JIS_FUNCTION);
 248     table.makeIndex();
 249
 250     // bluedwarf: dirty hack!
 251     //  There are some exceptions. Additional conversion are required following:
 252     //  0x0022 (QUOTATION MARK)  --> 0x201D (RIGHT DOUBLE QUOTATION MARK)
 253     //  0x0027 (APOSTROPHE)      --> 0x2019 (RIGHT SINGLE QUOTATION MARK)
 254     //  0x005C (REVERSE SOLIDUS) --> 0xFFE5 (FULLWIDTH YEN SIGN)
 255     //  0x0060 (GRAVE ACCENT)    --> 0x2018 (LEFT SINGLE QUOTATION MARK)
 256     //
 257     //  See the following page for detail:
 258     // http://wiki.openoffice.org/wiki/Calc/Features/JIS_and_ASC_functions
 259     int i, j;
 260     int n = sizeof(half2fullJISException) / sizeof(UnicodePairWithFlag);
 261     for( i = 0; i < n; i++ )
 262     {
 263         const int high = (half2fullJISException[i].first >> 8) & 0xFF;
 264         const int low  = (half2fullJISException[i].first)      & 0xFF;
 265
 266         if( !table.mpIndex[high] )
 267         {
 268             table.mpIndex[high] = new UnicodePairWithFlag*[256];
 269
 270             for( j = 0; j < 256; j++ )
 271                 table.mpIndex[high][j] = NULL;
 272         }
 273         table.mpIndex[high][low] = &half2fullJISException[i];
 274     }
 275
 276     return table;
 277 }
 278
 279 oneToOneMapping& widthfolding::getfullKana2halfKanaTable()
 280 {
 281     static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_KATAKANA_ONLY);
 282     table.makeIndex();
 283     return table;
 284 }
 285
 286 oneToOneMapping& widthfolding::gethalfKana2fullKanaTable()
 287 {
 288     static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_KATAKANA_ONLY);
 289     table.makeIndex();
 290     return table;
 291 }
 292
 293 } } } }
 294
 295 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */