intl/unicharutil/util/GreekCasing.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "GreekCasing.h"
   7 #include "nsUnicharUtils.h"
   8
   9 // Custom uppercase mapping for Greek; see bug 307039 for details
  10 #define GREEK_LOWER_ALPHA                      0x03B1
  11 #define GREEK_LOWER_ALPHA_TONOS                0x03AC
  12 #define GREEK_LOWER_ALPHA_OXIA                 0x1F71
  13 #define GREEK_LOWER_EPSILON                    0x03B5
  14 #define GREEK_LOWER_EPSILON_TONOS              0x03AD
  15 #define GREEK_LOWER_EPSILON_OXIA               0x1F73
  16 #define GREEK_LOWER_ETA                        0x03B7
  17 #define GREEK_LOWER_ETA_TONOS                  0x03AE
  18 #define GREEK_LOWER_ETA_OXIA                   0x1F75
  19 #define GREEK_LOWER_IOTA                       0x03B9
  20 #define GREEK_LOWER_IOTA_TONOS                 0x03AF
  21 #define GREEK_LOWER_IOTA_OXIA                  0x1F77
  22 #define GREEK_LOWER_IOTA_DIALYTIKA             0x03CA
  23 #define GREEK_LOWER_IOTA_DIALYTIKA_TONOS       0x0390
  24 #define GREEK_LOWER_IOTA_DIALYTIKA_OXIA        0x1FD3
  25 #define GREEK_LOWER_OMICRON                    0x03BF
  26 #define GREEK_LOWER_OMICRON_TONOS              0x03CC
  27 #define GREEK_LOWER_OMICRON_OXIA               0x1F79
  28 #define GREEK_LOWER_UPSILON                    0x03C5
  29 #define GREEK_LOWER_UPSILON_TONOS              0x03CD
  30 #define GREEK_LOWER_UPSILON_OXIA               0x1F7B
  31 #define GREEK_LOWER_UPSILON_DIALYTIKA          0x03CB
  32 #define GREEK_LOWER_UPSILON_DIALYTIKA_TONOS    0x03B0
  33 #define GREEK_LOWER_UPSILON_DIALYTIKA_OXIA     0x1FE3
  34 #define GREEK_LOWER_OMEGA                      0x03C9
  35 #define GREEK_LOWER_OMEGA_TONOS                0x03CE
  36 #define GREEK_LOWER_OMEGA_OXIA                 0x1F7D
  37 #define GREEK_UPPER_ALPHA                      0x0391
  38 #define GREEK_UPPER_EPSILON                    0x0395
  39 #define GREEK_UPPER_ETA                        0x0397
  40 #define GREEK_UPPER_IOTA                       0x0399
  41 #define GREEK_UPPER_IOTA_DIALYTIKA             0x03AA
  42 #define GREEK_UPPER_OMICRON                    0x039F
  43 #define GREEK_UPPER_UPSILON                    0x03A5
  44 #define GREEK_UPPER_UPSILON_DIALYTIKA          0x03AB
  45 #define GREEK_UPPER_OMEGA                      0x03A9
  46 #define GREEK_UPPER_ALPHA_TONOS                0x0386
  47 #define GREEK_UPPER_ALPHA_OXIA                 0x1FBB
  48 #define GREEK_UPPER_EPSILON_TONOS              0x0388
  49 #define GREEK_UPPER_EPSILON_OXIA               0x1FC9
  50 #define GREEK_UPPER_ETA_TONOS                  0x0389
  51 #define GREEK_UPPER_ETA_OXIA                   0x1FCB
  52 #define GREEK_UPPER_IOTA_TONOS                 0x038A
  53 #define GREEK_UPPER_IOTA_OXIA                  0x1FDB
  54 #define GREEK_UPPER_OMICRON_TONOS              0x038C
  55 #define GREEK_UPPER_OMICRON_OXIA               0x1FF9
  56 #define GREEK_UPPER_UPSILON_TONOS              0x038E
  57 #define GREEK_UPPER_UPSILON_OXIA               0x1FEB
  58 #define GREEK_UPPER_OMEGA_TONOS                0x038F
  59 #define GREEK_UPPER_OMEGA_OXIA                 0x1FFB
  60 #define COMBINING_ACUTE_ACCENT                 0x0301
  61 #define COMBINING_DIAERESIS                    0x0308
  62 #define COMBINING_ACUTE_TONE_MARK              0x0341
  63 #define COMBINING_GREEK_DIALYTIKA_TONOS        0x0344
  64
  65 namespace mozilla {
  66
  67 uint32_t
  68 GreekCasing::UpperCase(uint32_t aCh, GreekCasing::State& aState)
  69 {
  70   switch (aCh) {
  71   case GREEK_UPPER_ALPHA:
  72   case GREEK_LOWER_ALPHA:
  73     aState = kAlpha;
  74     return GREEK_UPPER_ALPHA;
  75
  76   case GREEK_UPPER_EPSILON:
  77   case GREEK_LOWER_EPSILON:
  78     aState = kEpsilon;
  79     return GREEK_UPPER_EPSILON;
  80
  81   case GREEK_UPPER_ETA:
  82   case GREEK_LOWER_ETA:
  83     aState = kEta;
  84     return GREEK_UPPER_ETA;
  85
  86   case GREEK_UPPER_IOTA:
  87     aState = kIota;
  88     return GREEK_UPPER_IOTA;
  89
  90   case GREEK_UPPER_OMICRON:
  91   case GREEK_LOWER_OMICRON:
  92     aState = kOmicron;
  93     return GREEK_UPPER_OMICRON;
  94
  95   case GREEK_UPPER_UPSILON:
  96     switch (aState) {
  97     case kOmicron:
  98       aState = kOmicronUpsilon;
  99       break;
 100     default:
 101       aState = kUpsilon;
 102       break;
 103     }
 104     return GREEK_UPPER_UPSILON;
 105
 106   case GREEK_UPPER_OMEGA:
 107   case GREEK_LOWER_OMEGA:
 108     aState = kOmega;
 109     return GREEK_UPPER_OMEGA;
 110
 111   // iota and upsilon may be the second vowel of a diphthong
 112   case GREEK_LOWER_IOTA:
 113     switch (aState) {
 114     case kAlphaAcc:
 115     case kEpsilonAcc:
 116     case kOmicronAcc:
 117     case kUpsilonAcc:
 118       aState = kStart;
 119       return GREEK_UPPER_IOTA_DIALYTIKA;
 120     default:
 121       break;
 122     }
 123     aState = kIota;
 124     return GREEK_UPPER_IOTA;
 125
 126   case GREEK_LOWER_UPSILON:
 127     switch (aState) {
 128     case kAlphaAcc:
 129     case kEpsilonAcc:
 130     case kEtaAcc:
 131     case kOmicronAcc:
 132       aState = kStart;
 133       return GREEK_UPPER_UPSILON_DIALYTIKA;
 134     case kOmicron:
 135       aState = kOmicronUpsilon;
 136       break;
 137     default:
 138       aState = kUpsilon;
 139       break;
 140     }
 141     return GREEK_UPPER_UPSILON;
 142
 143   case GREEK_UPPER_IOTA_DIALYTIKA:
 144   case GREEK_LOWER_IOTA_DIALYTIKA:
 145   case GREEK_UPPER_UPSILON_DIALYTIKA:
 146   case GREEK_LOWER_UPSILON_DIALYTIKA:
 147   case COMBINING_DIAERESIS:
 148     aState = kDiaeresis;
 149     return ToUpperCase(aCh);
 150
 151   // remove accent if it follows a vowel or diaeresis,
 152   // and set appropriate state for diphthong detection
 153   case COMBINING_ACUTE_ACCENT:
 154   case COMBINING_ACUTE_TONE_MARK:
 155     switch (aState) {
 156     case kAlpha:
 157       aState = kAlphaAcc;
 158       return uint32_t(-1); // omit this char from result string
 159     case kEpsilon:
 160       aState = kEpsilonAcc;
 161       return uint32_t(-1);
 162     case kEta:
 163       aState = kEtaAcc;
 164       return uint32_t(-1);
 165     case kIota:
 166       aState = kIotaAcc;
 167       return uint32_t(-1);
 168     case kOmicron:
 169       aState = kOmicronAcc;
 170       return uint32_t(-1);
 171     case kUpsilon:
 172       aState = kUpsilonAcc;
 173       return uint32_t(-1);
 174     case kOmicronUpsilon:
 175       aState = kStart; // this completed a diphthong
 176       return uint32_t(-1);
 177     case kOmega:
 178       aState = kOmegaAcc;
 179       return uint32_t(-1);
 180     case kDiaeresis:
 181       aState = kStart;
 182       return uint32_t(-1);
 183     default:
 184       break;
 185     }
 186     break;
 187
 188   // combinations with dieresis+accent just strip the accent,
 189   // and reset to start state (don't form diphthong with following vowel)
 190   case GREEK_LOWER_IOTA_DIALYTIKA_TONOS:
 191   case GREEK_LOWER_IOTA_DIALYTIKA_OXIA:
 192     aState = kStart;
 193     return GREEK_UPPER_IOTA_DIALYTIKA;
 194
 195   case GREEK_LOWER_UPSILON_DIALYTIKA_TONOS:
 196   case GREEK_LOWER_UPSILON_DIALYTIKA_OXIA:
 197     aState = kStart;
 198     return GREEK_UPPER_UPSILON_DIALYTIKA;
 199
 200   case COMBINING_GREEK_DIALYTIKA_TONOS:
 201     aState = kStart;
 202     return COMBINING_DIAERESIS;
 203
 204   // strip accents from vowels, and note the vowel seen so that we can detect
 205   // diphthongs where diaeresis needs to be added
 206   case GREEK_LOWER_ALPHA_TONOS:
 207   case GREEK_LOWER_ALPHA_OXIA:
 208   case GREEK_UPPER_ALPHA_TONOS:
 209   case GREEK_UPPER_ALPHA_OXIA:
 210     aState = kAlphaAcc;
 211     return GREEK_UPPER_ALPHA;
 212
 213   case GREEK_LOWER_EPSILON_TONOS:
 214   case GREEK_LOWER_EPSILON_OXIA:
 215   case GREEK_UPPER_EPSILON_TONOS:
 216   case GREEK_UPPER_EPSILON_OXIA:
 217     aState = kEpsilonAcc;
 218     return GREEK_UPPER_EPSILON;
 219
 220   case GREEK_LOWER_ETA_TONOS:
 221   case GREEK_LOWER_ETA_OXIA:
 222   case GREEK_UPPER_ETA_TONOS:
 223   case GREEK_UPPER_ETA_OXIA:
 224     aState = kEtaAcc;
 225     return GREEK_UPPER_ETA;
 226
 227   case GREEK_LOWER_IOTA_TONOS:
 228   case GREEK_LOWER_IOTA_OXIA:
 229   case GREEK_UPPER_IOTA_TONOS:
 230   case GREEK_UPPER_IOTA_OXIA:
 231     aState = kIotaAcc;
 232     return GREEK_UPPER_IOTA;
 233
 234   case GREEK_LOWER_OMICRON_TONOS:
 235   case GREEK_LOWER_OMICRON_OXIA:
 236   case GREEK_UPPER_OMICRON_TONOS:
 237   case GREEK_UPPER_OMICRON_OXIA:
 238     aState = kOmicronAcc;
 239     return GREEK_UPPER_OMICRON;
 240
 241   case GREEK_LOWER_UPSILON_TONOS:
 242   case GREEK_LOWER_UPSILON_OXIA:
 243   case GREEK_UPPER_UPSILON_TONOS:
 244   case GREEK_UPPER_UPSILON_OXIA:
 245     switch (aState) {
 246     case kOmicron:
 247       aState = kStart; // this completed a diphthong
 248       break;
 249     default:
 250       aState = kUpsilonAcc;
 251       break;
 252     }
 253     return GREEK_UPPER_UPSILON;
 254
 255   case GREEK_LOWER_OMEGA_TONOS:
 256   case GREEK_LOWER_OMEGA_OXIA:
 257   case GREEK_UPPER_OMEGA_TONOS:
 258   case GREEK_UPPER_OMEGA_OXIA:
 259     aState = kOmegaAcc;
 260     return GREEK_UPPER_OMEGA;
 261   }
 262
 263   // all other characters just reset the state, and use standard mappings
 264   aState = kStart;
 265   return ToUpperCase(aCh);
 266 }
 267
 268 } // namespace mozilla