src/Trans.cpp

   1 /**
   2  * \file Trans.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Matthias Ettrich
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "Trans.h"
  15
  16 #include "Buffer.h"
  17 #include "BufferView.h"
  18 #include "Cursor.h"
  19 #include "CutAndPaste.h"
  20 #include "Lexer.h"
  21 #include "LyXRC.h"
  22 #include "Text.h"
  23
  24 #include "support/debug.h"
  25 #include "support/docstream.h"
  26 #include "support/FileName.h"
  27 #include "support/filetools.h"
  28 #include "support/lstrings.h"
  29
  30 using namespace std;
  31 using namespace lyx::support;
  32
  33 namespace lyx {
  34
  35 /////////////////////////////////////////////////////////////////////
  36 //
  37 // TeXAccents
  38 //
  39 /////////////////////////////////////////////////////////////////////
  40
  41 /* the names used by TeX and XWindows for deadkeys/accents are not the same
  42    so here follows a table to clearify the differences. Please correct this
  43    if I got it wrong
  44
  45    |------------------|------------------|------------------|--------------|
  46    |      TeX         |     XWindows     |   \bind/LFUN     | used by intl |
  47    |------------------|------------------|------------------|--------------|
  48    |    grave         |    grave         |LFUN_ACCENT_GRAVE        | grave
  49    |    acute         |    acute         |LFUN_ACCENT_ACUTE        | acute
  50    |    circumflex    |    circumflex    |LFUN_ACCENT_CIRCUMFLEX   | circumflex
  51    | umlaut/dieresis  |    diaeresis     |LFUN_ACCENT_UMLAUT       | umlaut
  52    |    tilde         |    tilde         |LFUN_ACCENT_TILDE        | tilde
  53    |    macron        |    maron         |LFUN_ACCENT_MACRON       | macron
  54    |    dot           |    abovedot      |LFUN_ACCENT_DOT          | dot
  55    |    cedilla       |    cedilla       |LFUN_ACCENT_CEDILLA      | cedilla
  56    |    underdot      |                  |LFUN_ACCENT_UNDERDOT     | underdot
  57    |    underbar      |                  |LFUN_ACCENT_UNDERBAR     | underbar
  58    |    hácek         |    caron         |LFUN_ACCENT_CARON        | caron
  59    |    breve         |    breve         |LFUN_ACCENT_BREVE        | breve
  60    |    tie           |                  |LFUN_ACCENT_TIE          | tie
  61    | Hungarian umlaut |    doubleacute   |LFUN_ACCENT_HUNGARIAN_UMLAUT  | hungarian umlaut
  62    |    circle        |    abovering     |LFUN_ACCENT_CIRCLE       | circle
  63    |                  |    ogonek        |                  |
  64    |                  |    iota          |                  |
  65    |                  |    voiced_sound  |                  |
  66    |                  | semivoiced_sound |                  |
  67    */
  68 static TeXAccent lyx_accent_table[] = {
  69         {TEX_NOACCENT,   0,      "",                LFUN_NOACTION},
  70         {TEX_ACUTE,      0x0301, "acute",           LFUN_ACCENT_ACUTE},
  71         {TEX_GRAVE,      0x0300, "grave",           LFUN_ACCENT_GRAVE},
  72         {TEX_MACRON,     0x0304, "macron",          LFUN_ACCENT_MACRON},
  73         {TEX_TILDE,      0x0303, "tilde",           LFUN_ACCENT_TILDE},
  74         {TEX_PERISPOMENI, 0x0342, "perispomeni",    LFUN_ACCENT_PERISPOMENI},
  75         {TEX_UNDERBAR,   0x0320, "underbar",        LFUN_ACCENT_UNDERBAR}, // COMBINING MINUS SIGN BELOW or 0x0331 COMBINING MACRON BELOW ?
  76
  77         {TEX_CEDILLA,    0x0327, "cedilla",         LFUN_ACCENT_CEDILLA},
  78         {TEX_UNDERDOT,   0x0323, "underdot",        LFUN_ACCENT_UNDERDOT},
  79         {TEX_CIRCUMFLEX, 0x0302, "circumflex",      LFUN_ACCENT_CIRCUMFLEX},
  80         {TEX_CIRCLE,     0x030a, "circle",          LFUN_ACCENT_CIRCLE},
  81         {TEX_TIE,        0x0361, "tie",             LFUN_ACCENT_TIE},
  82         {TEX_BREVE,      0x0306, "breve",           LFUN_ACCENT_BREVE},
  83         {TEX_CARON,      0x030c, "caron",           LFUN_ACCENT_CARON},
  84         // Don't fix this typo for compatibility reasons!
  85         {TEX_HUNGUML,    0x030b, "hugarian_umlaut", LFUN_ACCENT_HUNGARIAN_UMLAUT},
  86         {TEX_UMLAUT,     0x0308, "umlaut",          LFUN_ACCENT_UMLAUT},
  87         {TEX_DOT,        0x0307, "dot",             LFUN_ACCENT_DOT},
  88         {TEX_OGONEK,     0x0328, "ogonek",          LFUN_ACCENT_OGONEK}
  89 };
  90
  91
  92 TeXAccent get_accent(FuncCode action)
  93 {
  94         int i = 0;
  95         while (i <= TEX_MAX_ACCENT) {
  96                 if (lyx_accent_table[i].action == action)
  97                         return lyx_accent_table[i];
  98                 ++i;
  99         }
 100         struct TeXAccent temp = { static_cast<tex_accent>(0), 0,
 101                                           0, static_cast<FuncCode>(0)};
 102         return temp;
 103 }
 104
 105
 106 static docstring const doAccent(docstring const & s, tex_accent accent)
 107 {
 108         if (s.empty())
 109                 return docstring(1, lyx_accent_table[accent].ucs4);
 110
 111         odocstringstream os;
 112         os.put(s[0]);
 113         os.put(lyx_accent_table[accent].ucs4);
 114         if (s.length() > 1) {
 115                 if (accent != TEX_TIE || s.length() > 2)
 116                         lyxerr << "Warning: Too many characters given for accent "
 117                                << lyx_accent_table[accent].name << '.' << endl;
 118                 os << s.substr(1);
 119         }
 120         return normalize_c(os.str());
 121 }
 122
 123
 124 static docstring const doAccent(char_type c, tex_accent accent)
 125 {
 126         return doAccent(docstring(1, c), accent);
 127 }
 128
 129
 130
 131 /////////////////////////////////////////////////////////////////////
 132 //
 133 // Trans
 134 //
 135 /////////////////////////////////////////////////////////////////////
 136
 137
 138 void Trans::insertException(KmodException & exclist, char_type c,
 139         docstring const & data, bool flag, tex_accent accent)
 140 {
 141         Keyexc p;
 142         p.c = c;
 143         p.data = data;
 144         p.combined = flag;
 145         p.accent = accent;
 146         exclist.insert(exclist.begin(), p);
 147         // or just
 148         // exclist.push_back(p);
 149 }
 150
 151
 152 void Trans::freeException(KmodException & exclist)
 153 {
 154         exclist.clear();
 155 }
 156
 157
 158 void Trans::freeKeymap()
 159 {
 160         kmod_list_.clear();
 161         keymap_.clear();
 162 }
 163
 164
 165 bool Trans::isDefined() const
 166 {
 167         return !name_.empty();
 168 }
 169
 170
 171 enum {
 172         KCOMB = 1,
 173         KMOD,
 174         KMAP,
 175         KXMOD
 176 };
 177
 178
 179 tex_accent getkeymod(string const &);
 180
 181
 182 void Trans::addDeadkey(tex_accent accent, docstring const & keys)
 183 {
 184         KmodInfo tmp;
 185         tmp.data = keys;
 186         tmp.accent = accent;
 187         kmod_list_[accent] = tmp;
 188
 189         for (docstring::size_type i = 0; i < keys.length(); ++i) {
 190                 // FIXME This is a hack.
 191                 // tmp is no valid UCS4 string, but misused to store the
 192                 // accent.
 193                 docstring tmp;
 194                 tmp += char_type(0);
 195                 tmp += char_type(accent);
 196                 keymap_[keys[i]] = tmp;
 197         }
 198 }
 199
 200
 201 int Trans::load(Lexer & lex)
 202 {
 203         bool error = false;
 204
 205         while (lex.isOK() && !error) {
 206                 switch (lex.lex()) {
 207                 case KMOD:
 208                 {
 209                         LYXERR(Debug::KBMAP, "KMOD:\t" << lex.getString());
 210                         if (!lex.next(true))
 211                                 return -1;
 212
 213                         LYXERR(Debug::KBMAP, "key\t`" << lex.getString() << '\'');
 214
 215                         docstring const keys = lex.getDocString();
 216
 217                         if (!lex.next(true))
 218                                 return -1;
 219
 220                         LYXERR(Debug::KBMAP, "accent\t`" << lex.getString() << '\'');
 221
 222                         tex_accent accent = getkeymod(lex.getString());
 223
 224                         if (accent == TEX_NOACCENT)
 225                                 return -1;
 226
 227 #if 1
 228                         // FIXME: This code should be removed...
 229                         // But we need to fix up all the kmap files first
 230                         // so that this field is not present anymore.
 231                         if (!lex.next(true))
 232                                 return -1;
 233
 234                         LYXERR(Debug::KBMAP, "allowed\t`" << lex.getString() << '\'');
 235
 236                         /* string const allowed = lex.getString(); */
 237                         addDeadkey(accent, keys /*, allowed*/);
 238 #else
 239                         addDeadkey(accent, keys);
 240 #endif
 241                         break;
 242                 }
 243                 case KCOMB: {
 244                         string str;
 245
 246                         LYXERR(Debug::KBMAP, "KCOMB:");
 247                         if (!lex.next(true))
 248                                 return -1;
 249
 250                         str = lex.getString();
 251                         LYXERR(Debug::KBMAP, str);
 252
 253                         tex_accent accent_1 = getkeymod(str);
 254                         if (accent_1 == TEX_NOACCENT)
 255                                 return -1;
 256
 257                         if (!lex.next(true))
 258                                 return -1;
 259
 260                         str = lex.getString();
 261                         LYXERR(Debug::KBMAP, str);
 262
 263                         tex_accent accent_2 = getkeymod(str);
 264                         if (accent_2 == TEX_NOACCENT) return -1;
 265
 266                         map<tex_accent, KmodInfo>::iterator it1 =
 267                                 kmod_list_.find(accent_1);
 268                         map<tex_accent, KmodInfo>::iterator it2 =
 269                                 kmod_list_.find(accent_2);
 270                         if (it1 == kmod_list_.end() || it2 == kmod_list_.end())
 271                                 return -1;
 272
 273                         // Find what key accent_2 is on - should
 274                         // check about accent_1 also
 275                         map<char_type, docstring>::iterator it = keymap_.begin();
 276                         map<char_type, docstring>::iterator end = keymap_.end();
 277                         for (; it != end; ++it) {
 278                                 if (!it->second.empty()
 279                                     && it->second[0] == 0
 280                                     && it->second[1] == accent_2)
 281                                         break;
 282                         }
 283                         docstring allowed;
 284                         if (!lex.next())
 285                                 return -1;
 286
 287                         allowed = lex.getDocString();
 288                         LYXERR(Debug::KBMAP, "allowed: " << to_utf8(allowed));
 289
 290                         insertException(kmod_list_[accent_1].exception_list,
 291                                         it->first, allowed, true, accent_2);
 292                 }
 293                 break;
 294                 case KMAP: {
 295                         unsigned char key_from;
 296
 297                         LYXERR(Debug::KBMAP, "KMAP:\t" << lex.getString());
 298
 299                         if (!lex.next(true))
 300                                 return -1;
 301
 302                         key_from = lex.getString()[0];
 303                         LYXERR(Debug::KBMAP, "\t`" << lex.getString() << '\'');
 304
 305                         if (!lex.next(true))
 306                                 return -1;
 307
 308                         docstring const string_to = lex.getDocString();
 309                         keymap_[key_from] = string_to;
 310                         LYXERR(Debug::KBMAP, "\t`" << to_utf8(string_to) << '\'');
 311                         break;
 312                 }
 313                 case KXMOD: {
 314                         tex_accent accent;
 315                         char_type key;
 316                         docstring str;
 317
 318                         LYXERR(Debug::KBMAP, "KXMOD:\t" << lex.getString());
 319
 320                         if (!lex.next(true))
 321                                 return -1;
 322
 323                         LYXERR(Debug::KBMAP, "\t`" << lex.getString() << '\'');
 324                         accent = getkeymod(lex.getString());
 325
 326                         if (!lex.next(true))
 327                                 return -1;
 328
 329                         LYXERR(Debug::KBMAP, "\t`" << lex.getString() << '\'');
 330                         key = lex.getDocString()[0];
 331
 332                         if (!lex.next(true))
 333                                 return -1;
 334
 335                         LYXERR(Debug::KBMAP, "\t`" << lex.getString() << '\'');
 336                         str = lex.getDocString();
 337
 338                         insertException(kmod_list_[accent].exception_list,
 339                                         key, str);
 340                         break;
 341                 }
 342                 case Lexer::LEX_FEOF:
 343                         LYXERR(Debug::PARSER, "End of parsing");
 344                         break;
 345                 default:
 346                         lex.printError("ParseKeymapFile: Unknown tag: `$$Token'");
 347                         return -1;
 348                 }
 349         }
 350         return 0;
 351 }
 352
 353
 354 bool Trans::isAccentDefined(tex_accent accent, KmodInfo & i) const
 355 {
 356         map<tex_accent, KmodInfo>::const_iterator cit = kmod_list_.find(accent);
 357         if (cit == kmod_list_.end())
 358                 return false;
 359         i = cit->second;
 360         return true;
 361 }
 362
 363
 364 docstring const Trans::process(char_type c, TransManager & k)
 365 {
 366         docstring const t = match(c);
 367
 368         if (t.empty() && c != 0)
 369                 return k.normalkey(c);
 370
 371         if (!t.empty() && t[0] != 0)
 372                 return t; //return k.normalkey(c);
 373
 374         return k.deadkey(c, kmod_list_[static_cast<tex_accent>(t[1])]);
 375 }
 376
 377
 378 int Trans::load(string const & language)
 379 {
 380         LexerKeyword kmapTags[] = {
 381                 {"\\kcomb", KCOMB },
 382                 { "\\kmap", KMAP },
 383                 { "\\kmod", KMOD },
 384                 { "\\kxmod", KXMOD }
 385         };
 386
 387         FileName const filename = libFileSearch("kbd", language, "kmap");
 388         if (filename.empty())
 389                 return -1;
 390
 391         freeKeymap();
 392         Lexer lex(kmapTags);
 393         lex.setFile(filename);
 394
 395         int const res = load(lex);
 396
 397         if (res == 0)
 398                 name_ = language;
 399         else
 400                 name_.erase();
 401
 402         return res;
 403 }
 404
 405
 406 tex_accent getkeymod(string const & p)
 407         /* return modifier - decoded from p and update p */
 408 {
 409         for (int i = 1; i <= TEX_MAX_ACCENT; ++i) {
 410                 LYXERR(Debug::KBMAP, "p = " << p
 411                        << ", lyx_accent_table[" << i
 412                        << "].name = `" << lyx_accent_table[i].name << '\'');
 413
 414                 if (lyx_accent_table[i].name
 415                      && contains(p, lyx_accent_table[i].name)) {
 416                         LYXERR(Debug::KBMAP, "Found it!");
 417                         return static_cast<tex_accent>(i);
 418                 }
 419         }
 420         return TEX_NOACCENT;
 421 }
 422
 423
 424 /////////////////////////////////////////////////////////////////////
 425 //
 426 // TransState
 427 //
 428 /////////////////////////////////////////////////////////////////////
 429
 430
 431 // TransFSMData
 432 TransFSMData::TransFSMData()
 433 {
 434         deadkey_ = deadkey2_ = 0;
 435         deadkey_info_.accent = deadkey2_info_.accent = TEX_NOACCENT;
 436 }
 437
 438
 439 // TransState
 440 char_type const TransState::TOKEN_SEP = 4;
 441
 442
 443 // TransInitState
 444 TransInitState::TransInitState()
 445 {
 446         init_state_ = this;
 447 }
 448
 449
 450 docstring const TransInitState::normalkey(char_type c)
 451 {
 452         docstring res;
 453         res = c;
 454         return res;
 455 }
 456
 457
 458 docstring const TransInitState::deadkey(char_type c, KmodInfo d)
 459 {
 460         deadkey_ = c;
 461         deadkey_info_ = d;
 462         currentState = deadkey_state_;
 463         return docstring();
 464 }
 465
 466
 467 // TransDeadkeyState
 468 TransDeadkeyState::TransDeadkeyState()
 469 {
 470         deadkey_state_ = this;
 471 }
 472
 473
 474 docstring const TransDeadkeyState::normalkey(char_type c)
 475 {
 476         docstring res;
 477
 478         KmodException::iterator it = deadkey_info_.exception_list.begin();
 479         KmodException::iterator end = deadkey_info_.exception_list.end();
 480
 481         for (; it != end; ++it) {
 482                 if (it->c == c) {
 483                         res = it->data;
 484                         break;
 485                 }
 486         }
 487         if (it == end) {
 488                 res = doAccent(c, deadkey_info_.accent);
 489         }
 490         currentState = init_state_;
 491         return res;
 492 }
 493
 494
 495 docstring const TransDeadkeyState::deadkey(char_type c, KmodInfo d)
 496 {
 497         docstring res;
 498
 499         // Check if the same deadkey was typed twice
 500         if (deadkey_ == c) {
 501                 res = deadkey_;
 502                 deadkey_ = 0;
 503                 deadkey_info_.accent = TEX_NOACCENT;
 504                 currentState = init_state_;
 505                 return res;
 506         }
 507
 508         // Check if it is a combination or an exception
 509         KmodException::const_iterator cit = deadkey_info_.exception_list.begin();
 510         KmodException::const_iterator end = deadkey_info_.exception_list.end();
 511         for (; cit != end; ++cit) {
 512                 if (cit->combined == true && cit->accent == d.accent) {
 513                         deadkey2_ = c;
 514                         deadkey2_info_ = d;
 515                         comb_info_ = (*cit);
 516                         currentState = combined_state_;
 517                         return docstring();
 518                 }
 519                 if (cit->c == c) {
 520                         res = cit->data;
 521                         deadkey_ = 0;
 522                         deadkey_info_.accent = TEX_NOACCENT;
 523                         currentState = init_state_;
 524                         return res;
 525                 }
 526         }
 527
 528         // Not a combination or an exception.
 529         // Output deadkey1 and keep deadkey2
 530
 531         if (deadkey_!= 0)
 532                 res = deadkey_;
 533         deadkey_ = c;
 534         deadkey_info_ = d;
 535         currentState = deadkey_state_;
 536         return res;
 537 }
 538
 539
 540 TransCombinedState::TransCombinedState()
 541 {
 542         combined_state_ = this;
 543 }
 544
 545
 546 docstring const TransCombinedState::normalkey(char_type c)
 547 {
 548         docstring const temp = doAccent(c, deadkey2_info_.accent);
 549         docstring const res = doAccent(temp, deadkey_info_.accent);
 550         currentState = init_state_;
 551         return res;
 552 }
 553
 554
 555 docstring const TransCombinedState::deadkey(char_type c, KmodInfo d)
 556 {
 557         // Third key in a row. Output the first one and
 558         // reenter with shifted deadkeys
 559         docstring res;
 560         if (deadkey_ != 0)
 561                 res = deadkey_;
 562         res += TOKEN_SEP;
 563         deadkey_ = deadkey2_;
 564         deadkey_info_ = deadkey2_info_;
 565         res += deadkey_state_->deadkey(c, d);
 566         return res;
 567 }
 568
 569
 570 // TransFSM
 571 TransFSM::TransFSM()
 572         : TransFSMData(), TransInitState(), TransDeadkeyState(), TransCombinedState()
 573 {
 574         currentState = init_state_;
 575 }
 576
 577
 578 // TransManager
 579
 580 // Initialize static member.
 581 Trans TransManager::default_;
 582
 583
 584 TransManager::TransManager()
 585         : active_(&default_)
 586 {}
 587
 588
 589 int TransManager::setPrimary(string const & language)
 590 {
 591         if (t1_.getName() == language)
 592                 return 0;
 593
 594         return t1_.load(language);
 595 }
 596
 597
 598 int TransManager::setSecondary(string const & language)
 599 {
 600         if (t2_.getName() == language)
 601                 return 0;
 602
 603         return t2_.load(language);
 604 }
 605
 606
 607 void TransManager::enablePrimary()
 608 {
 609         if (t1_.isDefined())
 610                 active_ = &t1_;
 611
 612         LYXERR(Debug::KBMAP, "Enabling primary keymap");
 613 }
 614
 615
 616 void TransManager::enableSecondary()
 617 {
 618         if (t2_.isDefined())
 619                 active_ = &t2_;
 620         LYXERR(Debug::KBMAP, "Enabling secondary keymap");
 621 }
 622
 623
 624 void TransManager::disableKeymap()
 625 {
 626         active_ = &default_;
 627         LYXERR(Debug::KBMAP, "Disabling keymap");
 628 }
 629
 630
 631 void  TransManager::translateAndInsert(char_type c, Text * text, Cursor & cur)
 632 {
 633         docstring res = active_->process(c, *this);
 634
 635         // Process with tokens
 636         docstring temp;
 637
 638         while (res.length() > 0) {
 639                 res = split(res, temp, TransState::TOKEN_SEP);
 640                 insert(temp, text, cur);
 641         }
 642 }
 643
 644
 645 void TransManager::insert(docstring const & str, Text * text, Cursor & cur)
 646 {
 647         for (size_t i = 0, n = str.size(); i != n; ++i)
 648                 text->insertChar(cur, str[i]);
 649 }
 650
 651
 652 void TransManager::deadkey(char_type c, tex_accent accent, Text * t, Cursor & cur)
 653 {
 654         if (c == 0 && active_ != &default_) {
 655                 // A deadkey was pressed that cannot be printed
 656                 // or a accent command was typed in the minibuffer
 657                 KmodInfo i;
 658                 if (active_->isAccentDefined(accent, i) == true) {
 659                         docstring const res = trans_fsm_
 660                                 .currentState->deadkey(c, i);
 661                         insert(res, t, cur);
 662                         return;
 663                 }
 664         }
 665
 666         if (active_ == &default_ || c == 0) {
 667                 KmodInfo i;
 668                 i.accent = accent;
 669                 i.data.erase();
 670                 docstring res = trans_fsm_.currentState->deadkey(c, i);
 671                 insert(res, t, cur);
 672         } else {
 673                 // Go through the translation
 674                 translateAndInsert(c, t, cur);
 675         }
 676 }
 677
 678
 679 } // namespace lyx