src/mathed/math_parser.C

   1 /*
   2  *  File:        math_parser.C
   3  *  Purpose:     Parser for mathed
   4  *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   5  *  Created:     January 1996
   6  *  Description: Parse LaTeX2e math mode code.
   7  *
   8  *  Dependencies: Xlib, XForms
   9  *
  10  *  Copyright: 1996, Alejandro Aguilar Sierra
  11  *
  12  *   Version: 0.8beta.
  13  *
  14  *   You are free to use and modify this code under the terms of
  15  *   the GNU General Public Licence version 2 or later.
  16  */
  17
  18 // {[(
  19
  20 #include <config.h>
  21
  22 #include <cctype>
  23
  24 #ifdef __GNUG__
  25 #pragma implementation
  26 #endif
  27
  28 #include "math_parser.h"
  29 #include "array.h"
  30 #include "math_inset.h"
  31 #include "math_arrayinset.h"
  32 #include "math_bigopinset.h"
  33 #include "math_dotsinset.h"
  34 #include "math_decorationinset.h"
  35 #include "math_deliminset.h"
  36 #include "math_fracinset.h"
  37 #include "math_funcinset.h"
  38 #include "math_macro.h"
  39 #include "math_macrotable.h"
  40 #include "math_macrotemplate.h"
  41 #include "math_matrixinset.h"
  42 #include "math_rootinset.h"
  43 #include "math_scriptinset.h"
  44 #include "math_sizeinset.h"
  45 #include "math_spaceinset.h"
  46 #include "math_sqrtinset.h"
  47 #include "debug.h"
  48 #include "mathed/support.h"
  49 #include "lyxlex.h"
  50
  51 using std::istream;
  52 using std::endl;
  53
  54
  55
  56 // These are lexical codes, not semantic
  57 enum lexcode_enum {
  58         LexNone,
  59         LexESC,
  60         LexAlpha,
  61         LexDigit,
  62         LexBOP,         // Binary operators or relations
  63         LexMathSpace,
  64         LexOpen,
  65         LexClose,
  66         LexComment,
  67         LexArgument,
  68         LexSpace,
  69         LexNewLine,
  70         LexOther,
  71         LexMath,
  72         LexSelf
  73 };
  74
  75 lexcode_enum lexcode[256];
  76
  77
  78 char const * latex_special_chars = "#$%&_{}";
  79
  80
  81 namespace {
  82
  83 void mathed_parse(MathArray & array, unsigned flags);
  84
  85 unsigned char getuchar(std::istream * is)
  86 {
  87         char c;
  88         is->get(c);
  89         return static_cast<unsigned char>(c);
  90 }
  91
  92 const unsigned char LM_TK_OPEN  = '{';
  93 const unsigned char LM_TK_CLOSE = '}';
  94
  95 enum {
  96         FLAG_BRACE      = 1 << 0,  //  A { needed              //}
  97         FLAG_BRACE_LAST = 1 << 1,  //  // { Last } ends the parsing process
  98         FLAG_RIGHT      = 1 << 2,  //  Next right ends the parsing process
  99         FLAG_END        = 1 << 3,  //  Next end ends the parsing process
 100         FLAG_BRACE_FONT = 1 << 4,  //  // { Next } closes a font
 101         FLAG_BRACK_END  = 1 << 5,  //  // [ Next ] ends the parsing process
 102         FLAG_AMPERSAND  = 1 << 6,  //  Next & ends the parsing process
 103         FLAG_NEWLINE    = 1 << 7,  //  Next \\ ends the parsing process
 104         FLAG_ITEM       = 1 << 8,  //  read a (possibly braced token)
 105         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 106         FLAG_OPTARG     = 1 << 10  //  reads an argument in []
 107 };
 108
 109 ///
 110 union {
 111         ///
 112         int i;
 113         ///
 114         latexkeys const * l;
 115 } yylval;
 116
 117
 118
 119 string yytext;
 120 int yylineno;
 121 istream * yyis;
 122 MathTextCodes yyvarcode;
 123
 124
 125
 126 struct latex_mathenv_type {
 127         char const *      name;
 128         char const *      basename;
 129         MathInsetTypes    typ;
 130         bool              numbered;
 131         bool              ams;
 132 };
 133
 134 latex_mathenv_type latex_mathenv[] = {
 135         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 136         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 137         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 138         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 139         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 140         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 141         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 142         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 143         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 144         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 145         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 146         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 147 };
 148
 149 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 150
 151
 152
 153 void mathPrintError(string const & msg)
 154 {
 155         //lyxerr[Debug::MATHED] << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 156         lyxerr << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 157 }
 158
 159
 160 void lexInit()
 161 {
 162         for (int i = 0; i <= 255; ++i) {
 163                 if (isdigit(i))
 164                         lexcode[i] = LexDigit;
 165                 else if (isspace(i))
 166                         lexcode[i] = LexSpace;
 167                 else
 168                         lexcode[i] = LexAlpha;
 169         }
 170
 171         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 172         lexcode['\n'] = LexNewLine;
 173         lexcode['%'] = LexComment;
 174         lexcode['#'] = LexArgument;
 175         lexcode['$'] = LexMath;
 176         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 177                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 178
 179         lexcode['!'] = lexcode[','] = lexcode[':']
 180                 = lexcode[';'] = LexMathSpace;
 181
 182         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 183                 lexcode['?'] = LexOther;
 184
 185         lexcode['\''] = lexcode['@'] = LexAlpha;
 186
 187         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 188                 lexcode['&'] = LexSelf;
 189
 190         lexcode['\\'] = LexESC;
 191         lexcode['{'] = LexOpen;
 192         lexcode['}'] = LexClose;
 193 }
 194
 195
 196 string lexArg(unsigned char lf, bool accept_spaces = false)
 197 {
 198         string result;
 199         unsigned char c = 0;
 200         while (yyis->good()) {
 201                 c = getuchar(yyis);
 202                 if (!isspace(c))
 203                         break;
 204         }
 205
 206         if (c != lf) {
 207                 yyis->putback(c);
 208                 return result;
 209         }
 210
 211         unsigned char rg = 0;
 212         if (lf == '{') rg = '}';
 213         if (lf == '[') rg = ']';
 214         if (lf == '(') rg = ')';
 215         if (!rg) {
 216                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 217                         << lf << "'" << endl;
 218                 return result;
 219         }
 220
 221         int depth = 1;
 222         do {
 223                 unsigned char c = getuchar(yyis);
 224                 if (c == lf)
 225                         ++depth;
 226                 if (c == rg)
 227                         --depth;
 228                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 229                         result += c;
 230         } while (depth > 0 && yyis->good());
 231
 232         return result;
 233 }
 234
 235
 236 int yylex()
 237 {
 238         static bool init_done = false;
 239
 240         if (!init_done) {
 241                 lexInit();
 242                 init_done = true;
 243         }
 244
 245         while (yyis->good()) {
 246                 unsigned char c = getuchar(yyis);
 247                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 248
 249                 if (yyvarcode == LM_TC_TEXTRM && c == ' ') {
 250                         yylval.i = ' ';
 251                         return LM_TK_ALPHA;
 252                 } else if (lexcode[c] == LexNewLine) {
 253                         ++yylineno;
 254                         continue;
 255                 } else if (lexcode[c] == LexComment) {
 256                         do {
 257                                 c = getuchar(yyis);
 258                         } while (c != '\n' && yyis->good());  // eat comments
 259                 } else if (lexcode[c] == LexDigit
 260                            || lexcode[c] == LexOther
 261                            || lexcode[c] == LexMathSpace) {
 262                         yylval.i = c;
 263                         return LM_TK_STR;
 264                 } else if (lexcode[c] == LexAlpha) {
 265                         yylval.i = c;
 266                         return LM_TK_ALPHA;
 267                 } else if (lexcode[c] == LexBOP) {
 268                         yylval.i = c;
 269                         return LM_TK_BOP;
 270                 } else if (lexcode[c] == LexMath) {
 271                         yylval.i = 0;
 272                         return LM_TK_MATH;
 273                 } else if (lexcode[c] == LexSelf) {
 274                         return c;
 275                 } else if (lexcode[c] == LexArgument) {
 276                         c = getuchar(yyis);
 277                         yylval.i = c - '0';
 278                         return LM_TK_ARGUMENT;
 279                 } else if (lexcode[c] == LexOpen) {
 280                         return LM_TK_OPEN;
 281                 } else if (lexcode[c] == LexClose) {
 282                         return LM_TK_CLOSE;
 283                 } else if (lexcode[c] == LexESC)   {
 284                         c = getuchar(yyis);
 285                         if (c == '\\')  {
 286                                 yylval.i = -1;
 287                                 return LM_TK_NEWLINE;
 288                         }
 289                         if (c == '(') {
 290                                 yylval.i = LM_OT_SIMPLE;
 291                                 return LM_TK_BEGIN;
 292                         }
 293                         if (c == ')') {
 294                                 yylval.i = LM_OT_SIMPLE;
 295                                 return LM_TK_END;
 296                         }
 297                         if (c == '[') {
 298                                 yylval.i = LM_OT_EQUATION;
 299                                 return LM_TK_BEGIN;
 300                         }
 301                         if (c == ']') {
 302                                 yylval.i = LM_OT_EQUATION;
 303                                 return LM_TK_END;
 304                         }
 305                         if (contains(latex_special_chars, c)) {
 306                                 yylval.i = c;
 307                                 return LM_TK_SPECIAL;
 308                         }
 309                         if (lexcode[c] == LexMathSpace) {
 310                                 int i;
 311                                 for (i = 0; i < 4 && static_cast<int>(c) != latex_mathspace[i][0]; ++i)
 312                                         ;
 313                                 yylval.i = (i < 4) ? i : 0;
 314                                 return LM_TK_SPACE;
 315                         }
 316                         if (lexcode[c] == LexAlpha) {
 317                                 yytext.erase();
 318                                 while (lexcode[c] == LexAlpha && yyis->good()) {
 319                                         yytext += c;
 320                                         c = getuchar(yyis);
 321                                 }
 322                                 if (yyis->good())
 323                                         yyis->putback(c);
 324                                 //lyxerr[Debug::MATHED] << "reading: text '" << yytext << "'\n";
 325                                 latexkeys const * l = in_word_set(yytext);
 326                                 if (!l)
 327                                         return LM_TK_UNDEF;
 328
 329                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 330                                         string name = lexArg('{');
 331                                         int i = 0;
 332                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 333                                                  ++i;
 334                                         yylval.i = i;
 335                                 } else if (l->token == LM_TK_SPACE)
 336                                         yylval.i = l->id;
 337                                 else
 338                                         yylval.l = l;
 339                                 return l->token;
 340                         }
 341                 }
 342         }
 343         return 0;
 344 }
 345
 346
 347
 348 MathScriptInset * prevScriptInset(MathArray const & array)
 349 {
 350         MathInset * p = array.back_inset();
 351         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
 352 }
 353
 354
 355 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
 356 {
 357         MathScriptInset * p = prevScriptInset(array);
 358         if (!p) {
 359                 MathInset * b = array.back_inset();
 360                 if (b && b->isScriptable()) {
 361                         p = new MathScriptInset(up, down, b->clone());
 362                         array.pop_back();
 363                 } else {
 364                         p = new MathScriptInset(up, down);
 365                 }
 366                 array.push_back(p);
 367         }
 368         if (up)
 369                 p->up(true);
 370         if (down)
 371                 p->down(down);
 372         if (limits)
 373                 p->limits(limits);
 374         return p;
 375 }
 376
 377
 378
 379 static bool   curr_num;
 380 static string curr_label;
 381
 382 void mathed_parse_lines(MathInset * inset, int col, bool numbered, bool outmost)
 383 {
 384         // save global variables
 385         bool   saved_num   = curr_num;
 386         string saved_label = curr_label;
 387
 388         MathGridInset * p = static_cast<MathGridInset *>(inset);
 389         for (int row = 0; true; ++row) {
 390                 // reset global variables
 391                 curr_num   = numbered;
 392                 curr_label = string();
 393
 394                 // reading a row
 395                 int idx = p->nargs() - p->ncols();
 396                 for (int i = 0; i < col - 1; ++i, ++idx)
 397                         mathed_parse(p->cell(idx), FLAG_AMPERSAND);
 398                 mathed_parse(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 399
 400                 if (outmost) {
 401                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 402                         m->numbered(row, curr_num);
 403                         m->label(row, curr_label);
 404                 }
 405
 406                 // Hack!
 407                 // no newline
 408                 if (yylval.i != -1)
 409                         break;
 410
 411                 p->appendRow();
 412         }
 413
 414         // restore global variables
 415         curr_num   = saved_num;
 416         curr_label = saved_label;
 417 }
 418
 419
 420 MathInset * mathed_parse()
 421 {
 422         MathInset * p = 0;
 423         int t = yylex();
 424
 425         switch (t) {
 426                 case LM_TK_NEWCOMMAND: {
 427                         string name = lexArg('{').substr(1);
 428                         string arg  = lexArg('[');
 429                         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 430                         p = new MathMacroTemplate(name, narg);
 431                         mathed_parse(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 432                         //lyxerr[Debug::MATHED] << "LM_TK_NEWCOMMAND: name: "
 433                         //      << name << " nargs: " << narg << "\n";
 434                         break;
 435                 }
 436
 437                 case LM_TK_MATH:
 438                 case LM_TK_BEGIN: {
 439                         int i = yylval.i;
 440                         lyxerr[Debug::MATHED]
 441                                 << "reading math environment " << i << " "
 442                                 << latex_mathenv[i].name << "\n";
 443
 444                         MathInsetTypes typ = latex_mathenv[i].typ;
 445                         p = new MathMatrixInset(typ);
 446                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 447                         switch (typ) {
 448
 449                                 case LM_OT_SIMPLE: {
 450                                         curr_num   = latex_mathenv[i].numbered;
 451                                         curr_label = string();
 452                                         mathed_parse(m->cell(0), 0);
 453                                         m->numbered(0, curr_num);
 454                                         m->label(0, curr_label);
 455                                         break;
 456                                 }
 457
 458                                 case LM_OT_EQUATION: {
 459                                         curr_num   = latex_mathenv[i].numbered;
 460                                         curr_label = string();
 461                                         mathed_parse(m->cell(0), FLAG_END);
 462                                         m->numbered(0, curr_num);
 463                                         m->label(0, curr_label);
 464                                         break;
 465                                 }
 466
 467                                 case LM_OT_EQNARRAY: {
 468                                         mathed_parse_lines(m, 3, latex_mathenv[i].numbered, true);
 469                                         break;
 470                                 }
 471
 472                                 case LM_OT_ALIGN: {
 473                                         m->halign(lexArg('{'));
 474                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 475                                         break;
 476                                 }
 477
 478                                 case LM_OT_ALIGNAT: {
 479                                         m->halign(lexArg('{'));
 480                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 481                                         break;
 482                                 }
 483
 484                                 default:
 485                                         lyxerr[Debug::MATHED]
 486                                                 << "1: unknown math environment: " << typ << "\n";
 487                         }
 488
 489                         p->setName(latex_mathenv[i].basename);
 490
 491                         break;
 492                 }
 493
 494                 default:
 495                         lyxerr[Debug::MATHED]
 496                                 << "2 unknown math environment: " << t << "\n";
 497         }
 498
 499         return p;
 500 }
 501
 502
 503 void handle_frac(MathArray & array, string const & name)
 504 {
 505         MathFracInset * p = new MathFracInset(name);
 506         mathed_parse(p->cell(0), FLAG_ITEM);
 507         mathed_parse(p->cell(1), FLAG_ITEM);
 508         array.push_back(p);
 509 }
 510
 511
 512 void mathed_parse(MathArray & array, unsigned flags)
 513 {
 514         int t = yylex();
 515         bool panic = false;
 516         static int plevel = -1;
 517         yyvarcode = LM_TC_VAR;
 518
 519         int brace  = 0;
 520         int limits = 0;
 521
 522         ++plevel;
 523         while (t) {
 524                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << yylval.i << "\n";
 525                 //      << " plevel: " << plevel << " ";
 526                 //array.dump(lyxerr);
 527                 //lyxerr << "\n";
 528
 529                 if (flags & FLAG_ITEM) {
 530                         flags &= ~FLAG_ITEM;
 531                         if (t == LM_TK_OPEN) {
 532                                 // skip the brace and regard everything to the next matching
 533                                 // closing brace
 534                                 t = yylex();
 535                                 ++brace;
 536                                 flags |= FLAG_BRACE_LAST;
 537                         } else {
 538                                 // regard only this single token
 539                                 flags |= FLAG_LEAVE;
 540                         }
 541                 }
 542
 543                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 544                         mathPrintError(
 545                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 546                         panic = true;
 547                         break;
 548                 }
 549
 550                 switch (t) {
 551
 552                 case LM_TK_ALPHA:
 553                         array.push_back(yylval.i, yyvarcode);
 554                         break;
 555
 556                 case LM_TK_ARGUMENT:
 557                         array.push_back(new MathMacroArgument(yylval.i));
 558                         break;
 559
 560                 case LM_TK_SPECIAL:
 561                         array.push_back(yylval.i, LM_TC_SPECIAL);
 562                         break;
 563
 564                 case LM_TK_STR:
 565                         array.push_back(yylval.i, LM_TC_CONST);
 566                         break;
 567
 568                 case LM_TK_OPEN:
 569                         ++brace;
 570                         if (flags & FLAG_BRACE)
 571                                 flags &= ~FLAG_BRACE;
 572                         else
 573                                 array.push_back('{', LM_TC_TEX);
 574                         break;
 575
 576                 case LM_TK_CLOSE:
 577                         --brace;
 578                         if (brace < 0) {
 579                                 mathPrintError("Unmatching braces");
 580                                 panic = true;
 581                                 break;
 582                         }
 583                         if (flags & FLAG_BRACE_FONT) {
 584                                 yyvarcode = LM_TC_VAR;
 585                                 flags &= ~FLAG_BRACE_FONT;
 586                                 break;
 587                         }
 588                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 589                                 flags |= FLAG_LEAVE;
 590                         else
 591                                 array.push_back('}', LM_TC_TEX);
 592                         break;
 593
 594                 case '[':
 595                         array.push_back('[', LM_TC_CONST);
 596                         break;
 597
 598                 case ']':
 599                         if (flags & FLAG_BRACK_END)
 600                                 flags |= FLAG_LEAVE;
 601                         else
 602                                 array.push_back(']', LM_TC_CONST);
 603                         break;
 604
 605                 case '^':
 606                         mathed_parse(
 607                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 608                         break;
 609
 610                 case '_':
 611                         mathed_parse(
 612                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 613                         break;
 614
 615                 case LM_TK_LIMIT:
 616                         limits = yylval.l->id;
 617                         //lyxerr << "setting limit to " << limits << "\n";
 618                         break;
 619
 620                 case '&':
 621                         if (flags & FLAG_AMPERSAND) {
 622                                 flags &= ~FLAG_AMPERSAND;
 623                                 --plevel;
 624                                 return;
 625                         }
 626                         lyxerr[Debug::MATHED]
 627                                 << "found tab unexpectedly, array: '" << array << "'\n";
 628                         break;
 629
 630                 case LM_TK_NEWLINE:
 631                         if (flags & FLAG_NEWLINE) {
 632                                 flags &= ~FLAG_NEWLINE;
 633                                 --plevel;
 634                                 return;
 635                         }
 636                         lyxerr[Debug::MATHED]
 637                                 << "found newline unexpectedly, array: '" << array << "'\n";
 638                         break;
 639
 640                 case LM_TK_PROTECT:
 641                         break;
 642
 643                 case LM_TK_BIGSYM:
 644                 case LM_TK_SYM:
 645                 case LM_TK_FUNCLIM:
 646                         limits = 0;
 647                         array.push_back(new MathBigopInset(yylval.l));
 648                         break;
 649
 650                 case LM_TK_BOP:
 651                         array.push_back(yylval.i, LM_TC_BOP);
 652                         break;
 653
 654                 case LM_TK_SPACE:
 655                         if (yylval.i >= 0)
 656                                 array.push_back(new MathSpaceInset(yylval.i));
 657                         break;
 658
 659                 case LM_TK_DOTS:
 660                         array.push_back(new MathDotsInset(yylval.l));
 661                         break;
 662
 663                 case LM_TK_CHOOSE:
 664                         handle_frac(array, "atop");
 665                         break;
 666
 667                 case LM_TK_STACK:
 668                         handle_frac(array, "stackrel");
 669                         break;
 670
 671                 case LM_TK_FRAC:
 672                         handle_frac(array, "frac");
 673                         break;
 674
 675                 case LM_TK_SQRT:
 676                 {
 677                         unsigned char c = getuchar(yyis);
 678                         if (c == '[') {
 679                                 array.push_back(new MathRootInset);
 680                                 mathed_parse(array.back_inset()->cell(0), FLAG_BRACK_END);
 681                                 mathed_parse(array.back_inset()->cell(1), FLAG_ITEM);
 682                         } else {
 683                                 yyis->putback(c);
 684                                 array.push_back(new MathSqrtInset);
 685                                 mathed_parse(array.back_inset()->cell(0), FLAG_ITEM);
 686                         }
 687                         break;
 688                 }
 689
 690                 case LM_TK_LEFT:
 691                 {
 692                         int ld = yylex();
 693                         if (ld == LM_TK_SYM)
 694                                 ld = yylval.l->id;
 695                         else if (ld == LM_TK_STR || ld == LM_TK_BOP || ld == LM_TK_SPECIAL)
 696                                 ld = yylval.i;
 697
 698                         MathArray ar;
 699                         mathed_parse(ar, FLAG_RIGHT);
 700
 701                         int rd = yylex();
 702                         if (rd == LM_TK_SYM)
 703                                 rd = yylval.l->id;
 704                         else if (rd == LM_TK_STR || rd == LM_TK_BOP || rd == LM_TK_SPECIAL)
 705                                 rd = yylval.i;
 706
 707                         MathDelimInset * dl = new MathDelimInset(ld, rd);
 708                         dl->cell(0) = ar;
 709                         array.push_back(dl);
 710                         break;
 711                 }
 712
 713                 case LM_TK_RIGHT:
 714                         if (flags & FLAG_RIGHT) {
 715                                 --plevel;
 716                                 return;
 717                         }
 718                         mathPrintError("Unmatched right delimiter");
 719 //        panic = true;
 720                         break;
 721
 722                 case LM_TK_FONT:
 723                         yyvarcode = static_cast<MathTextCodes>(yylval.l->id);
 724                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 725                         break;
 726
 727                 case LM_TK_STY:
 728                 {
 729                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 730                         //MathArray tmp = array;
 731                         //MathSizeInset * p = new MathSizeInset(MathStyles(yylval.l->id));
 732                         //array.push_back(p);
 733                         //mathed_parse(p->cell(0), FLAG_BRACE_FONT);
 734                         break;
 735                 }
 736
 737
 738                 case LM_TK_DECORATION:
 739                 {
 740                         MathDecorationInset * p = new MathDecorationInset(yylval.l);
 741                         mathed_parse(p->cell(0), FLAG_ITEM);
 742                         array.push_back(p);
 743                         break;
 744                 }
 745
 746                 case LM_TK_NONUM:
 747                         curr_num = false;
 748                         break;
 749
 750                 case LM_TK_FUNC:
 751                         array.push_back(new MathFuncInset(yylval.l->name));
 752                         break;
 753
 754                 case LM_TK_UNDEF:
 755                         if (MathMacroTable::hasTemplate(yytext)) {
 756                                 MathMacro * m = MathMacroTable::cloneTemplate(yytext);
 757                                 for (int i = 0; i < m->nargs(); ++i)
 758                                         mathed_parse(m->cell(i), FLAG_ITEM);
 759                                 array.push_back(m);
 760                                 m->metrics(LM_ST_TEXT);
 761                         } else
 762                                 array.push_back(new MathFuncInset(yytext));
 763                         break;
 764
 765                 case LM_TK_MATH:
 766                 case LM_TK_END:
 767                         --plevel;
 768                         return;
 769
 770                 case LM_TK_BEGIN:
 771                 {
 772                         int i = yylval.i;
 773                         MathInsetTypes typ = latex_mathenv[i].typ;
 774
 775                         if (typ == LM_OT_MATRIX) {
 776                                 string valign = lexArg('[') + 'c';
 777                                 string halign = lexArg('{');
 778                                 //lyxerr << "valign: '" << valign << "'\n";
 779                                 //lyxerr << "halign: '" << halign << "'\n";
 780                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 781                                 m->valign(valign[0]);
 782                                 m->halign(halign);
 783
 784                                 mathed_parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 785                                 array.push_back(m);
 786                                 //lyxerr << "read matrix " << *m << "\n";
 787                                 break;
 788                         } else
 789                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 790                         break;
 791                 }
 792
 793                 case LM_TK_MACRO:
 794                         array.push_back(MathMacroTable::cloneTemplate(yylval.l->name));
 795                         break;
 796
 797                 case LM_TK_LABEL:
 798                         curr_label = lexArg('{', true);
 799                         break;
 800
 801                 default:
 802                         mathPrintError("Unrecognized token");
 803                         lyxerr[Debug::MATHED] << "[" << t << " " << yytext << "]" << endl;
 804                         break;
 805
 806                 } // end of big switch
 807
 808                 if (flags & FLAG_LEAVE) {
 809                         flags &= ~FLAG_LEAVE;
 810                         break;
 811                 }
 812
 813                 if (panic) {
 814                         lyxerr << " Math Panic, expect problems!" << endl;
 815                         //   Search for the end command.
 816                         do {
 817                                 t = yylex();
 818                         } while (yyis->good() && t != LM_TK_END && t);
 819                 } else
 820                         t = yylex();
 821
 822         }
 823         --plevel;
 824 }
 825
 826 }
 827
 828
 829 MathArray mathed_parse_cell(string const & str)
 830 {
 831         istringstream is(str.c_str());
 832         yyis     = &is;
 833         yylineno = 0;
 834         MathArray ar;
 835         mathed_parse(ar, 0);
 836         return ar;
 837 }
 838
 839
 840 MathInset * mathed_parse(string const & str)
 841 {
 842         istringstream is(str.c_str());
 843         return mathed_parse(is);
 844 }
 845
 846
 847 MathInset * mathed_parse(istream & is)
 848 {
 849         yyis     = &is;
 850         yylineno = 0;
 851         return mathed_parse();
 852 }
 853
 854
 855 MathInset * mathed_parse(LyXLex & lex)
 856 {
 857         yyis     = &lex.getStream();
 858         yylineno = lex.GetLineNo();
 859
 860         MathInset * p = mathed_parse();
 861
 862         // Update line number
 863         lex.setLineNo(yylineno);
 864
 865         // reading of end_inset
 866         while (lex.IsOK()) {
 867                 lex.nextToken();
 868                 if (lex.GetString() == "\\end_inset")
 869                         break;
 870                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 871                         " or missing \\end_inset!" << endl;
 872         }
 873
 874         return p;
 875 }
 876
 877 //]})