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_symbolinset.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 #include "support/lstrings.h"
  51
  52 using std::istream;
  53 using std::endl;
  54
  55
  56
  57 // These are lexical codes, not semantic
  58 enum lexcode_enum {
  59         LexNone,
  60         LexESC,
  61         LexAlpha,
  62         LexDigit,
  63         LexBOP,         // Binary operators or relations
  64         LexMathSpace,
  65         LexOpen,
  66         LexClose,
  67         LexComment,
  68         LexArgument,
  69         LexSpace,
  70         LexNewLine,
  71         LexOther,
  72         LexMath,
  73         LexSelf
  74 };
  75
  76 lexcode_enum lexcode[256];
  77
  78
  79 char const * latex_special_chars = "#$%&_{}";
  80
  81
  82 namespace {
  83
  84 void mathed_parse_into(MathArray & array, unsigned flags);
  85
  86 unsigned char getuchar(std::istream * is)
  87 {
  88         char c;
  89         is->get(c);
  90         if (!is->good()) {
  91                 lyxerr << "The input stream is not well..." << endl;
  92         }
  93
  94         return static_cast<unsigned char>(c);
  95 }
  96
  97 const unsigned char LM_TK_OPEN  = '{';
  98 const unsigned char LM_TK_CLOSE = '}';
  99
 100 enum {
 101         FLAG_BRACE      = 1 << 0,  //  A { needed              //}
 102         FLAG_BRACE_LAST = 1 << 1,  //  // { Last } ends the parsing process
 103         FLAG_RIGHT      = 1 << 2,  //  Next right ends the parsing process
 104         FLAG_END        = 1 << 3,  //  Next end ends the parsing process
 105         FLAG_BRACE_FONT = 1 << 4,  //  // { Next } closes a font
 106         FLAG_BRACK_END  = 1 << 5,  //  // [ Next ] ends the parsing process
 107         FLAG_AMPERSAND  = 1 << 6,  //  Next & ends the parsing process
 108         FLAG_NEWLINE    = 1 << 7,  //  Next \\ ends the parsing process
 109         FLAG_ITEM       = 1 << 8,  //  read a (possibly braced token)
 110         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 111         FLAG_OPTARG     = 1 << 10  //  reads an argument in []
 112 };
 113
 114 ///
 115 union {
 116         ///
 117         int i;
 118         ///
 119         latexkeys const * l;
 120 } yylval;
 121
 122
 123
 124 string yytext;
 125 int yylineno;
 126 istream * yyis;
 127 MathTextCodes yyvarcode;
 128
 129
 130
 131 struct latex_mathenv_type {
 132         char const *      name;
 133         char const *      basename;
 134         MathInsetTypes    typ;
 135         bool              numbered;
 136         bool              ams;
 137 };
 138
 139 latex_mathenv_type latex_mathenv[] = {
 140         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 141         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 142         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 143         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 144         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 145         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 146         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 147         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 148         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 149         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 150         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 151         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 152 };
 153
 154 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 155
 156
 157
 158 void mathPrintError(string const & msg)
 159 {
 160         //lyxerr[Debug::MATHED] << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 161         lyxerr << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 162 }
 163
 164
 165 void lexInit()
 166 {
 167         for (int i = 0; i <= 255; ++i) {
 168                 if (isdigit(i))
 169                         lexcode[i] = LexDigit;
 170                 else if (isspace(i))
 171                         lexcode[i] = LexSpace;
 172                 else
 173                         lexcode[i] = LexAlpha;
 174         }
 175
 176         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 177         lexcode['\n'] = LexNewLine;
 178         lexcode['%'] = LexComment;
 179         lexcode['#'] = LexArgument;
 180         lexcode['$'] = LexMath;
 181         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 182                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 183
 184         lexcode['!'] = lexcode[','] = lexcode[':']
 185                 = lexcode[';'] = LexMathSpace;
 186
 187         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 188                 lexcode['?'] = LexOther;
 189
 190         lexcode['\''] = lexcode['@'] = LexAlpha;
 191
 192         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 193                 lexcode['&'] = LexSelf;
 194
 195         lexcode['\\'] = LexESC;
 196         lexcode['{'] = LexOpen;
 197         lexcode['}'] = LexClose;
 198 }
 199
 200
 201 string lexArg(unsigned char lf, bool accept_spaces = false)
 202 {
 203         string result;
 204         unsigned char c = 0;
 205         while (yyis->good()) {
 206                 c = getuchar(yyis);
 207                 if (!isspace(c))
 208                         break;
 209         }
 210
 211         if (c != lf) {
 212                 yyis->putback(c);
 213                 return result;
 214         }
 215
 216         unsigned char rg = 0;
 217         if (lf == '{') rg = '}';
 218         if (lf == '[') rg = ']';
 219         if (lf == '(') rg = ')';
 220         if (!rg) {
 221                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 222                         << lf << "'" << endl;
 223                 return result;
 224         }
 225
 226         int depth = 1;
 227         do {
 228                 unsigned char c = getuchar(yyis);
 229                 if (c == lf)
 230                         ++depth;
 231                 if (c == rg)
 232                         --depth;
 233                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 234                         result += c;
 235         } while (depth > 0 && yyis->good());
 236
 237         return result;
 238 }
 239
 240
 241 int yylex()
 242 {
 243         static bool init_done = false;
 244
 245         if (!init_done) {
 246                 lexInit();
 247                 init_done = true;
 248         }
 249
 250         while (yyis->good()) {
 251                 unsigned char c = getuchar(yyis);
 252                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 253
 254                 if (yyvarcode == LM_TC_TEXTRM && c == ' ') {
 255                         yylval.i = ' ';
 256                         return LM_TK_ALPHA;
 257                 } else if (lexcode[c] == LexNewLine) {
 258                         ++yylineno;
 259                         continue;
 260                 } else if (lexcode[c] == LexComment) {
 261                         do {
 262                                 c = getuchar(yyis);
 263                         } while (c != '\n' && yyis->good());  // eat comments
 264                 } else if (lexcode[c] == LexDigit
 265                            || lexcode[c] == LexOther
 266                            || lexcode[c] == LexMathSpace) {
 267                         yylval.i = c;
 268                         return LM_TK_STR;
 269                 } else if (lexcode[c] == LexAlpha) {
 270                         yylval.i = c;
 271                         return LM_TK_ALPHA;
 272                 } else if (lexcode[c] == LexBOP) {
 273                         yylval.i = c;
 274                         return LM_TK_BOP;
 275                 } else if (lexcode[c] == LexMath) {
 276                         yylval.i = 0;
 277                         return LM_TK_MATH;
 278                 } else if (lexcode[c] == LexSelf) {
 279                         return c;
 280                 } else if (lexcode[c] == LexArgument) {
 281                         c = getuchar(yyis);
 282                         yylval.i = c - '0';
 283                         return LM_TK_ARGUMENT;
 284                 } else if (lexcode[c] == LexOpen) {
 285                         return LM_TK_OPEN;
 286                 } else if (lexcode[c] == LexClose) {
 287                         return LM_TK_CLOSE;
 288                 } else if (lexcode[c] == LexESC)   {
 289                         c = getuchar(yyis);
 290                         if (c == '\\')  {
 291                                 yylval.i = -1;
 292                                 return LM_TK_NEWLINE;
 293                         }
 294                         if (c == '(') {
 295                                 yylval.i = LM_OT_SIMPLE;
 296                                 return LM_TK_BEGIN;
 297                         }
 298                         if (c == ')') {
 299                                 yylval.i = LM_OT_SIMPLE;
 300                                 return LM_TK_END;
 301                         }
 302                         if (c == '[') {
 303                                 yylval.i = LM_OT_EQUATION;
 304                                 return LM_TK_BEGIN;
 305                         }
 306                         if (c == ']') {
 307                                 yylval.i = LM_OT_EQUATION;
 308                                 return LM_TK_END;
 309                         }
 310                         if (c == '|') {
 311                                 yytext = "|";
 312                                 return LM_TK_UNDEF;
 313                         }
 314                         if (contains(latex_special_chars, c)) {
 315                                 yylval.i = c;
 316                                 return LM_TK_SPECIAL;
 317                         }
 318                         if (lexcode[c] == LexMathSpace) {
 319                                 int i;
 320                                 for (i = 0; i < 4 && static_cast<int>(c) != latex_mathspace[i][0]; ++i)
 321                                         ;
 322                                 yylval.i = (i < 4) ? i : 0;
 323                                 return LM_TK_SPACE;
 324                         }
 325                         if (lexcode[c] == LexAlpha) {
 326                                 yytext.erase();
 327                                 while (lexcode[c] == LexAlpha && yyis->good()) {
 328                                         yytext += c;
 329                                         c = getuchar(yyis);
 330                                 }
 331                                 if (yyis->good())
 332                                         yyis->putback(c);
 333                                 //lyxerr[Debug::MATHED] << "reading: text '" << yytext << "'\n";
 334                                 latexkeys const * l = in_word_set(yytext);
 335                                 if (!l)
 336                                         return LM_TK_UNDEF;
 337
 338                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 339                                         string name = lexArg('{');
 340                                         int i = 0;
 341                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 342                                                  ++i;
 343                                         yylval.i = i;
 344                                 } else if (l->token == LM_TK_SPACE)
 345                                         yylval.i = l->id;
 346                                 else
 347                                         yylval.l = l;
 348                                 return l->token;
 349                         }
 350                 }
 351         }
 352         return 0;
 353 }
 354
 355
 356 MathScriptInset * prevScriptInset(MathArray const & array)
 357 {
 358         MathInset * p = array.back_inset();
 359         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
 360 }
 361
 362
 363 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
 364 {
 365         MathScriptInset * p = prevScriptInset(array);
 366         if (!p) {
 367                 MathInset * b = array.back_inset();
 368                 if (b && b->isScriptable()) {
 369                         p = new MathScriptInset(up, down, b->clone());
 370                         array.pop_back();
 371                 } else {
 372                         p = new MathScriptInset(up, down);
 373                 }
 374                 array.push_back(p);
 375         }
 376         if (up)
 377                 p->up(true);
 378         if (down)
 379                 p->down(down);
 380         if (limits)
 381                 p->limits(limits);
 382         return p;
 383 }
 384
 385
 386 static bool   curr_num;
 387 static string curr_label;
 388
 389 void mathed_parse_lines(MathInset * inset, int col,
 390                         bool numbered, bool outmost)
 391 {
 392         // save global variables
 393         bool   const saved_num   = curr_num;
 394         string const saved_label = curr_label;
 395
 396         MathGridInset * p = static_cast<MathGridInset *>(inset);
 397         for (int row = 0; true; ++row) {
 398                 // reset global variables
 399                 curr_num   = numbered;
 400                 curr_label.erase();
 401
 402                 // reading a row
 403                 int idx = p->nargs() - p->ncols();
 404                 for (int i = 0; i < col - 1; ++i, ++idx)
 405                         mathed_parse_into(p->cell(idx), FLAG_AMPERSAND);
 406                 mathed_parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 407
 408                 if (outmost) {
 409                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 410                         m->numbered(row, curr_num);
 411                         m->label(row, curr_label);
 412                 }
 413
 414                 // Hack!
 415                 // no newline
 416                 if (yylval.i != -1)
 417                         break;
 418
 419                 p->appendRow();
 420         }
 421
 422         // restore global variables
 423         curr_num   = saved_num;
 424         curr_label = saved_label;
 425 }
 426
 427
 428 MathInset * mathed_parse()
 429 {
 430         MathInset * p = 0;
 431         int t = yylex();
 432
 433         switch (t) {
 434                 case LM_TK_NEWCOMMAND: {
 435                         string const name = lexArg('{').substr(1);
 436                         string const arg  = lexArg('[');
 437                         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 438                         p = new MathMacroTemplate(name, narg);
 439                         mathed_parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 440                         //lyxerr[Debug::MATHED] << "LM_TK_NEWCOMMAND: name: "
 441                         //      << name << " nargs: " << narg << "\n";
 442                         break;
 443                 }
 444
 445                 case LM_TK_MATH:
 446                 case LM_TK_BEGIN: {
 447                         int i = yylval.i;
 448                         lyxerr[Debug::MATHED]
 449                                 << "reading math environment " << i << " "
 450                                 << latex_mathenv[i].name << "\n";
 451
 452                         MathInsetTypes typ = latex_mathenv[i].typ;
 453                         p = new MathMatrixInset(typ);
 454                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 455                         switch (typ) {
 456
 457                                 case LM_OT_SIMPLE: {
 458                                         curr_num   = latex_mathenv[i].numbered;
 459                                         curr_label.erase();
 460                                         mathed_parse_into(m->cell(0), 0);
 461                                         m->numbered(0, curr_num);
 462                                         m->label(0, curr_label);
 463                                         break;
 464                                 }
 465
 466                                 case LM_OT_EQUATION: {
 467                                         curr_num   = latex_mathenv[i].numbered;
 468                                         curr_label.erase();
 469                                         mathed_parse_into(m->cell(0), FLAG_END);
 470                                         m->numbered(0, curr_num);
 471                                         m->label(0, curr_label);
 472                                         break;
 473                                 }
 474
 475                                 case LM_OT_EQNARRAY: {
 476                                         mathed_parse_lines(m, 3, latex_mathenv[i].numbered, true);
 477                                         break;
 478                                 }
 479
 480                                 case LM_OT_ALIGN: {
 481                                         m->halign(lexArg('{'));
 482                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 483                                         break;
 484                                 }
 485
 486                                 case LM_OT_ALIGNAT: {
 487                                         m->halign(lexArg('{'));
 488                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 489                                         break;
 490                                 }
 491
 492                                 default:
 493                                         lyxerr[Debug::MATHED]
 494                                                 << "1: unknown math environment: " << typ << "\n";
 495                         }
 496
 497                         p->setName(latex_mathenv[i].basename);
 498
 499                         break;
 500                 }
 501
 502                 default:
 503                         lyxerr[Debug::MATHED]
 504                                 << "2 unknown math environment: " << t << "\n";
 505         }
 506
 507         return p;
 508 }
 509
 510
 511 void handle_frac(MathArray & array, string const & name)
 512 {
 513         MathFracInset * p = new MathFracInset(name);
 514         mathed_parse_into(p->cell(0), FLAG_ITEM);
 515         mathed_parse_into(p->cell(1), FLAG_ITEM);
 516         array.push_back(p);
 517 }
 518
 519
 520 void mathed_parse_into(MathArray & array, unsigned flags)
 521 {
 522         static int plevel = -1;
 523
 524         ++plevel;
 525         yyvarcode = LM_TC_VAR;
 526
 527         int  t      = yylex();
 528         bool panic  = false;
 529         int  brace  = 0;
 530         int  limits = 0;
 531
 532         while (t) {
 533                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << yylval.i
 534                 //      << " '" << yytext << "'\n";
 535                 //array.dump(lyxerr);
 536                 //lyxerr << "\n";
 537
 538                 if (flags & FLAG_ITEM) {
 539                         flags &= ~FLAG_ITEM;
 540                         if (t == LM_TK_OPEN) {
 541                                 // skip the brace and regard everything to the next matching
 542                                 // closing brace
 543                                 t = yylex();
 544                                 ++brace;
 545                                 flags |= FLAG_BRACE_LAST;
 546                         } else {
 547                                 // regard only this single token
 548                                 flags |= FLAG_LEAVE;
 549                         }
 550                 }
 551
 552                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 553                         mathPrintError(
 554                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 555                         panic = true;
 556                         break;
 557                 }
 558
 559                 switch (t) {
 560
 561                 case LM_TK_ALPHA:
 562                         array.push_back(yylval.i, yyvarcode);
 563                         break;
 564
 565                 case LM_TK_ARGUMENT:
 566                         array.push_back(new MathMacroArgument(yylval.i));
 567                         break;
 568
 569                 case LM_TK_SPECIAL:
 570                         array.push_back(yylval.i, LM_TC_SPECIAL);
 571                         break;
 572
 573                 case LM_TK_STR:
 574                         array.push_back(yylval.i, LM_TC_CONST);
 575                         break;
 576
 577                 case LM_TK_OPEN:
 578                         ++brace;
 579                         if (flags & FLAG_BRACE)
 580                                 flags &= ~FLAG_BRACE;
 581                         else
 582                                 array.push_back('{', LM_TC_TEX);
 583                         break;
 584
 585                 case LM_TK_CLOSE:
 586                         --brace;
 587                         if (brace < 0) {
 588                                 mathPrintError("Unmatching braces");
 589                                 panic = true;
 590                                 break;
 591                         }
 592                         if (flags & FLAG_BRACE_FONT) {
 593                                 yyvarcode = LM_TC_VAR;
 594                                 flags &= ~FLAG_BRACE_FONT;
 595                                 break;
 596                         }
 597                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 598                                 flags |= FLAG_LEAVE;
 599                         else
 600                                 array.push_back('}', LM_TC_TEX);
 601                         break;
 602
 603                 case '[':
 604                         array.push_back('[', LM_TC_CONST);
 605                         break;
 606
 607                 case ']':
 608                         if (flags & FLAG_BRACK_END)
 609                                 flags |= FLAG_LEAVE;
 610                         else
 611                                 array.push_back(']', LM_TC_CONST);
 612                         break;
 613
 614                 case '^':
 615                         mathed_parse_into(
 616                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 617                         break;
 618
 619                 case '_':
 620                         mathed_parse_into(
 621                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 622                         break;
 623
 624                 case LM_TK_LIMIT:
 625                         limits = yylval.l->id;
 626                         //lyxerr << "setting limit to " << limits << "\n";
 627                         break;
 628
 629                 case '&':
 630                         if (flags & FLAG_AMPERSAND) {
 631                                 flags &= ~FLAG_AMPERSAND;
 632                                 --plevel;
 633                                 return;
 634                         }
 635                         lyxerr[Debug::MATHED]
 636                                 << "found tab unexpectedly, array: '" << array << "'\n";
 637                         break;
 638
 639                 case LM_TK_NEWLINE:
 640                         if (flags & FLAG_NEWLINE) {
 641                                 flags &= ~FLAG_NEWLINE;
 642                                 --plevel;
 643                                 return;
 644                         }
 645                         lyxerr[Debug::MATHED]
 646                                 << "found newline unexpectedly, array: '" << array << "'\n";
 647                         break;
 648
 649                 case LM_TK_PROTECT:
 650                         break;
 651
 652                 case LM_TK_BIGSYM:
 653                 case LM_TK_SYM:
 654                 case LM_TK_FUNCLIM:
 655                         limits = 0;
 656                         array.push_back(new MathSymbolInset(yylval.l));
 657                         break;
 658
 659                 case LM_TK_BOP:
 660                         array.push_back(yylval.i, LM_TC_BOP);
 661                         break;
 662
 663                 case LM_TK_SPACE:
 664                         if (yylval.i >= 0)
 665                                 array.push_back(new MathSpaceInset(yylval.i));
 666                         break;
 667
 668                 case LM_TK_DOTS:
 669                         array.push_back(new MathDotsInset(yylval.l));
 670                         break;
 671
 672                 case LM_TK_CHOOSE:
 673                         handle_frac(array, "atop");
 674                         break;
 675
 676                 case LM_TK_STACK:
 677                         handle_frac(array, "stackrel");
 678                         break;
 679
 680                 case LM_TK_FRAC:
 681                         handle_frac(array, "frac");
 682                         break;
 683
 684                 case LM_TK_SQRT:
 685                 {
 686                         unsigned char c = getuchar(yyis);
 687                         if (c == '[') {
 688                                 array.push_back(new MathRootInset);
 689                                 mathed_parse_into(array.back_inset()->cell(0), FLAG_BRACK_END);
 690                                 mathed_parse_into(array.back_inset()->cell(1), FLAG_ITEM);
 691                         } else {
 692                                 yyis->putback(c);
 693                                 array.push_back(new MathSqrtInset);
 694                                 mathed_parse_into(array.back_inset()->cell(0), FLAG_ITEM);
 695                         }
 696                         break;
 697                 }
 698
 699                 case LM_TK_LEFT:
 700                 {
 701                         int ld = yylex();
 702                         if (ld == LM_TK_SYM)
 703                                 ld = yylval.l->id;
 704                         else if (ld == LM_TK_STR || ld == LM_TK_BOP || ld == LM_TK_SPECIAL)
 705                                 ld = yylval.i;
 706
 707                         MathArray ar;
 708                         mathed_parse_into(ar, FLAG_RIGHT);
 709
 710                         int rd = yylex();
 711                         if (rd == LM_TK_SYM)
 712                                 rd = yylval.l->id;
 713                         else if (rd == LM_TK_STR || rd == LM_TK_BOP || rd == LM_TK_SPECIAL)
 714                                 rd = yylval.i;
 715
 716                         MathDelimInset * dl = new MathDelimInset(ld, rd);
 717                         dl->cell(0) = ar;
 718                         array.push_back(dl);
 719                         break;
 720                 }
 721
 722                 case LM_TK_RIGHT:
 723                         if (flags & FLAG_RIGHT) {
 724                                 --plevel;
 725                                 return;
 726                         }
 727                         mathPrintError("Unmatched right delimiter");
 728 //        panic = true;
 729                         break;
 730
 731                 case LM_TK_FONT:
 732                         yyvarcode = static_cast<MathTextCodes>(yylval.l->id);
 733                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 734                         break;
 735
 736                 case LM_TK_STY:
 737                 {
 738                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 739                         //MathArray tmp = array;
 740                         //MathSizeInset * p = new MathSizeInset(MathStyles(yylval.l->id));
 741                         //array.push_back(p);
 742                         //mathed_parse_into(p->cell(0), FLAG_BRACE_FONT);
 743                         break;
 744                 }
 745
 746
 747                 case LM_TK_DECORATION:
 748                 {
 749                         MathDecorationInset * p = new MathDecorationInset(yylval.l);
 750                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 751                         array.push_back(p);
 752                         break;
 753                 }
 754
 755                 case LM_TK_NONUM:
 756                         curr_num = false;
 757                         break;
 758
 759                 case LM_TK_FUNC:
 760                         array.push_back(new MathSymbolInset(yylval.l));
 761                         break;
 762
 763                 case LM_TK_UNDEF:
 764                         if (MathMacroTable::hasTemplate(yytext)) {
 765                                 MathMacro * m = MathMacroTable::cloneTemplate(yytext);
 766                                 for (int i = 0; i < m->nargs(); ++i)
 767                                         mathed_parse_into(m->cell(i), FLAG_ITEM);
 768                                 array.push_back(m);
 769                                 m->metrics(LM_ST_TEXT);
 770                         } else
 771                                 array.push_back(new MathFuncInset(yytext));
 772                         break;
 773
 774                 case LM_TK_MATH:
 775                 case LM_TK_END:
 776                         --plevel;
 777                         return;
 778
 779                 case LM_TK_BEGIN:
 780                 {
 781                         int i = yylval.i;
 782                         MathInsetTypes typ = latex_mathenv[i].typ;
 783
 784                         if (typ == LM_OT_MATRIX) {
 785                                 string const valign = lexArg('[') + 'c';
 786                                 string const halign = lexArg('{');
 787                                 //lyxerr << "valign: '" << valign << "'\n";
 788                                 //lyxerr << "halign: '" << halign << "'\n";
 789                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 790                                 m->valign(valign[0]);
 791                                 m->halign(halign);
 792
 793                                 mathed_parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 794                                 array.push_back(m);
 795                                 //lyxerr << "read matrix " << *m << "\n";
 796                                 break;
 797                         } else
 798                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 799                         break;
 800                 }
 801
 802                 case LM_TK_MACRO:
 803                         array.push_back(MathMacroTable::cloneTemplate(yylval.l->name));
 804                         break;
 805
 806                 case LM_TK_LABEL:
 807                         curr_label = lexArg('{', true);
 808                         break;
 809
 810                 default:
 811                         mathPrintError("Unrecognized token");
 812                         lyxerr[Debug::MATHED] << "[" << t << " " << yytext << "]" << endl;
 813                         break;
 814
 815                 } // end of big switch
 816
 817                 if (flags & FLAG_LEAVE) {
 818                         flags &= ~FLAG_LEAVE;
 819                         break;
 820                 }
 821
 822                 if (panic) {
 823                         lyxerr << " Math Panic, expect problems!" << endl;
 824                         //   Search for the end command.
 825                         do {
 826                                 t = yylex();
 827                         } while (yyis->good() && t != LM_TK_END && t);
 828                 } else {
 829                         t = yylex();
 830                 }
 831         }
 832         --plevel;
 833 }
 834
 835 }
 836
 837
 838 MathArray mathed_parse_cell(string const & str)
 839 {
 840         istringstream is(str.c_str());
 841         yyis     = &is;
 842         yylineno = 0;
 843         MathArray ar;
 844         mathed_parse_into(ar, 0);
 845         return ar;
 846 }
 847
 848
 849 MathInset * mathed_parse(string const & str)
 850 {
 851         istringstream is(str.c_str());
 852         return mathed_parse(is);
 853 }
 854
 855
 856 MathInset * mathed_parse(istream & is)
 857 {
 858         yyis     = &is;
 859         yylineno = 0;
 860         return mathed_parse();
 861 }
 862
 863
 864 MathInset * mathed_parse(LyXLex & lex)
 865 {
 866         yyis     = &lex.getStream();
 867         yylineno = lex.GetLineNo();
 868
 869         MathInset * p = mathed_parse();
 870
 871         // Update line number
 872         lex.setLineNo(yylineno);
 873
 874         // reading of end_inset
 875         while (lex.IsOK()) {
 876                 lex.nextToken();
 877                 if (lex.GetString() == "\\end_inset")
 878                         break;
 879                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 880                         " or missing \\end_inset!" << endl;
 881         }
 882
 883         return p;
 884 }
 885
 886 //]})