icuSources/layout/IndicRearrangementProcessor.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
   4  *
   5  */
   6
   7 #include "LETypes.h"
   8 #include "MorphTables.h"
   9 #include "StateTables.h"
  10 #include "MorphStateTables.h"
  11 #include "SubtableProcessor.h"
  12 #include "StateTableProcessor.h"
  13 #include "IndicRearrangementProcessor.h"
  14 #include "LEGlyphStorage.h"
  15 #include "LESwaps.h"
  16
  17 U_NAMESPACE_BEGIN
  18
  19 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IndicRearrangementProcessor)
  20
  21   IndicRearrangementProcessor::IndicRearrangementProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success)
  22   : StateTableProcessor(morphSubtableHeader, success),
  23   indicRearrangementSubtableHeader(morphSubtableHeader, success),
  24   entryTable(stateTableHeader, success, (const IndicRearrangementStateEntry*)(&stateTableHeader->stHeader),
  25              entryTableOffset, LE_UNBOUNDED_ARRAY),
  26   int16Table(stateTableHeader, success, (const le_int16*)entryTable.getAlias(), 0, LE_UNBOUNDED_ARRAY)
  27
  28 {
  29 }
  30
  31 IndicRearrangementProcessor::~IndicRearrangementProcessor()
  32 {
  33 }
  34
  35 void IndicRearrangementProcessor::beginStateTable()
  36 {
  37     firstGlyph = 0;
  38     lastGlyph = 0;
  39 }
  40
  41 ByteOffset IndicRearrangementProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
  42 {
  43   LEErrorCode success = LE_NO_ERROR; // todo- make a param?
  44   const IndicRearrangementStateEntry *entry = entryTable.getAlias(index,success);
  45     ByteOffset newState = SWAPW(entry->newStateOffset);
  46     IndicRearrangementFlags flags = (IndicRearrangementFlags) SWAPW(entry->flags);
  47
  48     if (flags & irfMarkFirst) {
  49         firstGlyph = currGlyph;
  50     }
  51
  52     if (flags & irfMarkLast) {
  53         lastGlyph = currGlyph;
  54     }
  55
  56     doRearrangementAction(glyphStorage, (IndicRearrangementVerb) (flags & irfVerbMask));
  57
  58     if (!(flags & irfDontAdvance)) {
  59         // XXX: Should handle reverse too...
  60         currGlyph += 1;
  61     }
  62
  63     return newState;
  64 }
  65
  66 void IndicRearrangementProcessor::endStateTable()
  67 {
  68 }
  69
  70 void IndicRearrangementProcessor::doRearrangementAction(LEGlyphStorage &glyphStorage, IndicRearrangementVerb verb) const
  71 {
  72     LEGlyphID a, b, c, d;
  73     le_int32 ia, ib, ic, id, ix, x;
  74     LEErrorCode success = LE_NO_ERROR;
  75
  76     switch(verb)
  77     {
  78     case irvNoAction:
  79         break;
  80
  81     case irvxA:
  82         a = glyphStorage[firstGlyph];
  83         ia = glyphStorage.getCharIndex(firstGlyph, success);
  84         x = firstGlyph + 1;
  85
  86         while (x <= lastGlyph) {
  87             glyphStorage[x - 1] = glyphStorage[x];
  88             ix = glyphStorage.getCharIndex(x, success);
  89             glyphStorage.setCharIndex(x - 1, ix, success);
  90             x += 1;
  91         }
  92
  93         glyphStorage[lastGlyph] = a;
  94         glyphStorage.setCharIndex(lastGlyph, ia, success);
  95         break;
  96
  97     case irvDx:
  98         d = glyphStorage[lastGlyph];
  99         id = glyphStorage.getCharIndex(lastGlyph, success);
 100         x = lastGlyph - 1;
 101
 102         while (x >= firstGlyph) {
 103             glyphStorage[x + 1] = glyphStorage[x];
 104             ix = glyphStorage.getCharIndex(x, success);
 105             glyphStorage.setCharIndex(x + 1, ix, success);
 106             x -= 1;
 107         }
 108
 109         glyphStorage[firstGlyph] = d;
 110         glyphStorage.setCharIndex(firstGlyph, id, success);
 111         break;
 112
 113     case irvDxA:
 114         a = glyphStorage[firstGlyph];
 115         ia = glyphStorage.getCharIndex(firstGlyph, success);
 116         id = glyphStorage.getCharIndex(lastGlyph,  success);
 117
 118         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 119         glyphStorage[lastGlyph] = a;
 120
 121         glyphStorage.setCharIndex(firstGlyph, id, success);
 122         glyphStorage.setCharIndex(lastGlyph,  ia, success);
 123         break;
 124
 125     case irvxAB:
 126         a = glyphStorage[firstGlyph];
 127         b = glyphStorage[firstGlyph + 1];
 128         ia = glyphStorage.getCharIndex(firstGlyph, success);
 129         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 130         x = firstGlyph + 2;
 131
 132         while (x <= lastGlyph) {
 133             glyphStorage[x - 2] = glyphStorage[x];
 134             ix = glyphStorage.getCharIndex(x, success);
 135             glyphStorage.setCharIndex(x - 2, ix, success);
 136             x += 1;
 137         }
 138
 139         glyphStorage[lastGlyph - 1] = a;
 140         glyphStorage[lastGlyph] = b;
 141
 142         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 143         glyphStorage.setCharIndex(lastGlyph, ib, success);
 144         break;
 145
 146     case irvxBA:
 147         a = glyphStorage[firstGlyph];
 148         b = glyphStorage[firstGlyph + 1];
 149         ia = glyphStorage.getCharIndex(firstGlyph, success);
 150         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 151         x = firstGlyph + 2;
 152
 153         while (x <= lastGlyph) {
 154             glyphStorage[x - 2] = glyphStorage[x];
 155             ix = glyphStorage.getCharIndex(x, success);
 156             glyphStorage.setCharIndex(x - 2, ix, success);
 157             x += 1;
 158         }
 159
 160         glyphStorage[lastGlyph - 1] = b;
 161         glyphStorage[lastGlyph] = a;
 162
 163         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 164         glyphStorage.setCharIndex(lastGlyph, ia, success);
 165         break;
 166
 167     case irvCDx:
 168         c = glyphStorage[lastGlyph - 1];
 169         d = glyphStorage[lastGlyph];
 170         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 171         id = glyphStorage.getCharIndex(lastGlyph, success);
 172         x = lastGlyph - 2;
 173
 174         while (x >= firstGlyph) {
 175             glyphStorage[x + 2] = glyphStorage[x];
 176             ix = glyphStorage.getCharIndex(x, success);
 177             glyphStorage.setCharIndex(x + 2, ix, success);
 178             x -= 1;
 179         }
 180
 181         glyphStorage[firstGlyph] = c;
 182         glyphStorage[firstGlyph + 1] = d;
 183
 184         glyphStorage.setCharIndex(firstGlyph, ic, success);
 185         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 186         break;
 187
 188     case irvDCx:
 189         c = glyphStorage[lastGlyph - 1];
 190         d = glyphStorage[lastGlyph];
 191         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 192         id = glyphStorage.getCharIndex(lastGlyph, success);
 193         x = lastGlyph - 2;
 194
 195         while (x >= firstGlyph) {
 196             glyphStorage[x + 2] = glyphStorage[x];
 197             ix = glyphStorage.getCharIndex(x, success);
 198             glyphStorage.setCharIndex(x + 2, ix, success);
 199             x -= 1;
 200         }
 201
 202         glyphStorage[firstGlyph] = d;
 203         glyphStorage[firstGlyph + 1] = c;
 204
 205         glyphStorage.setCharIndex(firstGlyph, id, success);
 206         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 207         break;
 208
 209     case irvCDxA:
 210         a = glyphStorage[firstGlyph];
 211         c = glyphStorage[lastGlyph - 1];
 212         d = glyphStorage[lastGlyph];
 213         ia = glyphStorage.getCharIndex(firstGlyph, success);
 214         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 215         id = glyphStorage.getCharIndex(lastGlyph, success);
 216         x = lastGlyph - 2;
 217
 218         while (x > firstGlyph) {
 219             glyphStorage[x + 1] = glyphStorage[x];
 220             ix = glyphStorage.getCharIndex(x, success);
 221             glyphStorage.setCharIndex(x + 1, ix, success);
 222             x -= 1;
 223         }
 224
 225         glyphStorage[firstGlyph] = c;
 226         glyphStorage[firstGlyph + 1] = d;
 227         glyphStorage[lastGlyph] = a;
 228
 229         glyphStorage.setCharIndex(firstGlyph, ic, success);
 230         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 231         glyphStorage.setCharIndex(lastGlyph, ia, success);
 232         break;
 233
 234     case irvDCxA:
 235         a = glyphStorage[firstGlyph];
 236         c = glyphStorage[lastGlyph - 1];
 237         d = glyphStorage[lastGlyph];
 238         ia = glyphStorage.getCharIndex(firstGlyph, success);
 239         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 240         id = glyphStorage.getCharIndex(lastGlyph, success);
 241         x = lastGlyph - 2;
 242
 243         while (x > firstGlyph) {
 244             glyphStorage[x + 1] = glyphStorage[x];
 245             ix = glyphStorage.getCharIndex(x, success);
 246             glyphStorage.setCharIndex(x + 1, ix, success);
 247             x -= 1;
 248         }
 249
 250         glyphStorage[firstGlyph] = d;
 251         glyphStorage[firstGlyph + 1] = c;
 252         glyphStorage[lastGlyph] = a;
 253
 254         glyphStorage.setCharIndex(firstGlyph, id, success);
 255         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 256         glyphStorage.setCharIndex(lastGlyph, ia, success);
 257         break;
 258
 259     case irvDxAB:
 260         a = glyphStorage[firstGlyph];
 261         b = glyphStorage[firstGlyph + 1];
 262         d = glyphStorage[lastGlyph];
 263         ia = glyphStorage.getCharIndex(firstGlyph, success);
 264         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 265         id = glyphStorage.getCharIndex(lastGlyph, success);
 266         x = firstGlyph + 2;
 267
 268         while (x < lastGlyph) {
 269             glyphStorage[x - 2] = glyphStorage[x];
 270             ix = glyphStorage.getCharIndex(x, success);
 271             glyphStorage.setCharIndex(x - 2, ix, success);
 272             x += 1;
 273         }
 274
 275         glyphStorage[firstGlyph] = d;
 276         glyphStorage[lastGlyph - 1] = a;
 277         glyphStorage[lastGlyph] = b;
 278
 279         glyphStorage.setCharIndex(firstGlyph, id, success);
 280         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 281         glyphStorage.setCharIndex(lastGlyph, ib, success);
 282         break;
 283
 284     case irvDxBA:
 285         a = glyphStorage[firstGlyph];
 286         b = glyphStorage[firstGlyph + 1];
 287         d = glyphStorage[lastGlyph];
 288         ia = glyphStorage.getCharIndex(firstGlyph, success);
 289         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 290         id = glyphStorage.getCharIndex(lastGlyph, success);
 291         x = firstGlyph + 2;
 292
 293         while (x < lastGlyph) {
 294             glyphStorage[x - 2] = glyphStorage[x];
 295             ix = glyphStorage.getCharIndex(x, success);
 296             glyphStorage.setCharIndex(x - 2, ix, success);
 297             x += 1;
 298         }
 299
 300         glyphStorage[firstGlyph] = d;
 301         glyphStorage[lastGlyph - 1] = b;
 302         glyphStorage[lastGlyph] = a;
 303
 304         glyphStorage.setCharIndex(firstGlyph, id, success);
 305         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 306         glyphStorage.setCharIndex(lastGlyph, ia, success);
 307         break;
 308
 309     case irvCDxAB:
 310         a = glyphStorage[firstGlyph];
 311         b = glyphStorage[firstGlyph + 1];
 312
 313         glyphStorage[firstGlyph] = glyphStorage[lastGlyph - 1];
 314         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph];
 315
 316         glyphStorage[lastGlyph - 1] = a;
 317         glyphStorage[lastGlyph] = b;
 318
 319         ia = glyphStorage.getCharIndex(firstGlyph, success);
 320         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 321         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 322         id = glyphStorage.getCharIndex(lastGlyph, success);
 323
 324         glyphStorage.setCharIndex(firstGlyph, ic, success);
 325         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 326
 327         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 328         glyphStorage.setCharIndex(lastGlyph, ib, success);
 329         break;
 330
 331     case irvCDxBA:
 332         a = glyphStorage[firstGlyph];
 333         b = glyphStorage[firstGlyph + 1];
 334
 335         glyphStorage[firstGlyph] = glyphStorage[lastGlyph - 1];
 336         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph];
 337
 338         glyphStorage[lastGlyph - 1] = b;
 339         glyphStorage[lastGlyph] = a;
 340
 341         ia = glyphStorage.getCharIndex(firstGlyph, success);
 342         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 343         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 344         id = glyphStorage.getCharIndex(lastGlyph, success);
 345
 346         glyphStorage.setCharIndex(firstGlyph, ic, success);
 347         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 348
 349         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 350         glyphStorage.setCharIndex(lastGlyph, ia, success);
 351         break;
 352
 353     case irvDCxAB:
 354         a = glyphStorage[firstGlyph];
 355         b = glyphStorage[firstGlyph + 1];
 356
 357         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 358         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph - 1];
 359
 360         glyphStorage[lastGlyph - 1] = a;
 361         glyphStorage[lastGlyph] = b;
 362
 363         ia = glyphStorage.getCharIndex(firstGlyph, success);
 364         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 365         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 366         id = glyphStorage.getCharIndex(lastGlyph, success);
 367
 368         glyphStorage.setCharIndex(firstGlyph, id, success);
 369         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 370
 371         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 372         glyphStorage.setCharIndex(lastGlyph, ib, success);
 373         break;
 374
 375     case irvDCxBA:
 376         a = glyphStorage[firstGlyph];
 377         b = glyphStorage[firstGlyph + 1];
 378
 379         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 380         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph - 1];
 381
 382         glyphStorage[lastGlyph - 1] = b;
 383         glyphStorage[lastGlyph] = a;
 384
 385         ia = glyphStorage.getCharIndex(firstGlyph, success);
 386         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 387         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 388         id = glyphStorage.getCharIndex(lastGlyph, success);
 389
 390         glyphStorage.setCharIndex(firstGlyph, id, success);
 391         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 392
 393         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 394         glyphStorage.setCharIndex(lastGlyph, ia, success);
 395         break;
 396
 397     default:
 398         break;
 399     }
 400 }
 401
 402 U_NAMESPACE_END