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 = 0;
  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
 128
 129
 130 struct latex_mathenv_type {
 131         char const *      name;
 132         char const *      basename;
 133         MathInsetTypes    typ;
 134         bool              numbered;
 135         bool              ams;
 136 };
 137
 138 latex_mathenv_type latex_mathenv[] = {
 139         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 140         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 141         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 142         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 143         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 144         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 145         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 146         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 147         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 148         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 149         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 150         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 151 };
 152
 153 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 154
 155
 156
 157 void mathPrintError(string const & msg)
 158 {
 159         //lyxerr[Debug::MATHED] << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 160         lyxerr << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 161 }
 162
 163
 164 void lexInit()
 165 {
 166         for (int i = 0; i <= 255; ++i) {
 167                 if (isdigit(i))
 168                         lexcode[i] = LexDigit;
 169                 else if (isspace(i))
 170                         lexcode[i] = LexSpace;
 171                 else
 172                         lexcode[i] = LexAlpha;
 173         }
 174
 175         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 176         lexcode['\n'] = LexNewLine;
 177         lexcode['%'] = LexComment;
 178         lexcode['#'] = LexArgument;
 179         lexcode['$'] = LexMath;
 180         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 181                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 182
 183         lexcode['!'] = lexcode[','] = lexcode[':']
 184                 = lexcode[';'] = LexMathSpace;
 185
 186         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 187                 lexcode['?'] = LexOther;
 188
 189         lexcode['\''] = lexcode['@'] = LexAlpha;
 190
 191         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 192                 lexcode['&'] = LexSelf;
 193
 194         lexcode['\\'] = LexESC;
 195         lexcode['{'] = LexOpen;
 196         lexcode['}'] = LexClose;
 197 }
 198
 199
 200 string lexArg(unsigned char lf, bool accept_spaces = false)
 201 {
 202         string result;
 203         unsigned char c = 0;
 204         while (yyis->good()) {
 205                 c = getuchar(yyis);
 206                 if (!isspace(c))
 207                         break;
 208         }
 209
 210         if (c != lf) {
 211                 yyis->putback(c);
 212                 return result;
 213         }
 214
 215         unsigned char rg = 0;
 216         if (lf == '{') rg = '}';
 217         if (lf == '[') rg = ']';
 218         if (lf == '(') rg = ')';
 219         if (!rg) {
 220                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 221                         << lf << "'" << endl;
 222                 return result;
 223         }
 224
 225         int depth = 1;
 226         do {
 227                 unsigned char c = getuchar(yyis);
 228                 if (c == lf)
 229                         ++depth;
 230                 if (c == rg)
 231                         --depth;
 232                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 233                         result += c;
 234         } while (depth > 0 && yyis->good());
 235
 236         return result;
 237 }
 238
 239
 240 int yylex()
 241 {
 242         static bool init_done = false;
 243
 244         if (!init_done) {
 245                 lexInit();
 246                 init_done = true;
 247         }
 248
 249         while (yyis->good()) {
 250                 unsigned char c = getuchar(yyis);
 251                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 252
 253                 if (lexcode[c] == LexNewLine) {
 254                         ++yylineno;
 255                         continue;
 256                 } else if (lexcode[c] == LexComment) {
 257                         do {
 258                                 c = getuchar(yyis);
 259                         } while (c != '\n' && yyis->good());  // eat comments
 260                 } else if (lexcode[c] == LexDigit
 261                            || lexcode[c] == LexOther
 262                            || lexcode[c] == LexMathSpace) {
 263                         yylval.i = c;
 264                         return LM_TK_STR;
 265                 } else if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 266                         yylval.i = c;
 267                         return LM_TK_ALPHA;
 268                 } else if (lexcode[c] == LexBOP) {
 269                         yylval.i = c;
 270                         return LM_TK_BOP;
 271                 } else if (lexcode[c] == LexMath) {
 272                         yylval.i = 0;
 273                         return LM_TK_MATH;
 274                 } else if (lexcode[c] == LexSelf) {
 275                         return c;
 276                 } else if (lexcode[c] == LexArgument) {
 277                         c = getuchar(yyis);
 278                         yylval.i = c - '0';
 279                         return LM_TK_ARGUMENT;
 280                 } else if (lexcode[c] == LexOpen) {
 281                         return LM_TK_OPEN;
 282                 } else if (lexcode[c] == LexClose) {
 283                         return LM_TK_CLOSE;
 284                 } else if (lexcode[c] == LexESC)   {
 285                         c = getuchar(yyis);
 286                         if (c == '\\')  {
 287                                 yylval.i = -1;
 288                                 return LM_TK_NEWLINE;
 289                         }
 290                         if (c == '(') {
 291                                 yylval.i = LM_OT_SIMPLE;
 292                                 return LM_TK_BEGIN;
 293                         }
 294                         if (c == ')') {
 295                                 yylval.i = LM_OT_SIMPLE;
 296                                 return LM_TK_END;
 297                         }
 298                         if (c == '[') {
 299                                 yylval.i = LM_OT_EQUATION;
 300                                 return LM_TK_BEGIN;
 301                         }
 302                         if (c == ']') {
 303                                 yylval.i = LM_OT_EQUATION;
 304                                 return LM_TK_END;
 305                         }
 306                         if (c == '|') {
 307                                 yytext = "|";
 308                                 return LM_TK_UNDEF;
 309                         }
 310                         if (contains(latex_special_chars, c)) {
 311                                 yylval.i = c;
 312                                 return LM_TK_SPECIAL;
 313                         }
 314                         if (lexcode[c] == LexMathSpace) {
 315                                 int i;
 316                                 for (i = 0; i < 4 && static_cast<int>(c) != latex_mathspace[i][0]; ++i)
 317                                         ;
 318                                 yylval.i = (i < 4) ? i : 0;
 319                                 return LM_TK_SPACE;
 320                         }
 321                         if (lexcode[c] == LexAlpha) {
 322                                 yytext.erase();
 323                                 while (lexcode[c] == LexAlpha && yyis->good()) {
 324                                         yytext += c;
 325                                         c = getuchar(yyis);
 326                                 }
 327                                 while (lexcode[c] == LexSpace && yyis->good())
 328                                         c = getuchar(yyis);
 329                                 if (yyis->good() && lexcode[c] != LexSpace)
 330                                         yyis->putback(c);
 331
 332                                 //lyxerr[Debug::MATHED] << "reading: text '" << yytext << "'\n";
 333                                 latexkeys const * l = in_word_set(yytext);
 334                                 if (!l)
 335                                         return LM_TK_UNDEF;
 336
 337                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 338                                         string name = lexArg('{');
 339                                         int i = 0;
 340                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 341                                                  ++i;
 342                                         yylval.i = i;
 343                                 } else if (l->token == LM_TK_SPACE)
 344                                         yylval.i = l->id;
 345                                 else
 346                                         yylval.l = l;
 347                                 return l->token;
 348                         }
 349                 }
 350         }
 351         return 0;
 352 }
 353
 354
 355 MathScriptInset * prevScriptInset(MathArray const & array)
 356 {
 357         MathInset * p = array.back_inset();
 358         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
 359 }
 360
 361
 362 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
 363 {
 364         MathScriptInset * p = prevScriptInset(array);
 365         if (!p) {
 366                 MathInset * b = array.back_inset();
 367                 if (b && b->isScriptable()) {
 368                         p = new MathScriptInset(up, down, b->clone());
 369                         array.pop_back();
 370                 } else {
 371                         p = new MathScriptInset(up, down);
 372                 }
 373                 array.push_back(p);
 374         }
 375         if (up)
 376                 p->up(true);
 377         if (down)
 378                 p->down(down);
 379         if (limits)
 380                 p->limits(limits);
 381         return p;
 382 }
 383
 384
 385 static bool   curr_num;
 386 static string curr_label;
 387
 388 void mathed_parse_lines(MathInset * inset, int col,
 389                         bool numbered, bool outmost)
 390 {
 391         // save global variables
 392         bool   const saved_num   = curr_num;
 393         string const saved_label = curr_label;
 394
 395         MathGridInset * p = static_cast<MathGridInset *>(inset);
 396         for (int row = 0; true; ++row) {
 397                 // reset global variables
 398                 curr_num   = numbered;
 399                 curr_label.erase();
 400
 401                 // reading a row
 402                 int idx = p->nargs() - p->ncols();
 403                 for (int i = 0; i < col - 1; ++i, ++idx)
 404                         mathed_parse_into(p->cell(idx), FLAG_AMPERSAND);
 405                 mathed_parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 406
 407                 if (outmost) {
 408                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 409                         m->numbered(row, curr_num);
 410                         m->label(row, curr_label);
 411                 }
 412
 413                 // Hack!
 414                 // no newline
 415                 if (yylval.i != -1)
 416                         break;
 417
 418                 p->appendRow();
 419         }
 420
 421         // restore global variables
 422         curr_num   = saved_num;
 423         curr_label = saved_label;
 424 }
 425
 426
 427 MathMacroTemplate * mathed_parse_macro()
 428 {
 429         if (yylex() != LM_TK_NEWCOMMAND) {
 430                 lyxerr << "\\newcommand expected\n";
 431                 return 0;
 432         }
 433
 434         string name = lexArg('{').substr(1);
 435         string arg  = lexArg('[');
 436         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 437         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 438         mathed_parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 439         return p;
 440 }
 441
 442
 443 MathMatrixInset * mathed_parse_normal()
 444 {
 445         MathMatrixInset * p = 0;
 446         int t = yylex();
 447
 448         switch (t) {
 449                 case LM_TK_MATH:
 450                 case LM_TK_BEGIN: {
 451                         int i = yylval.i;
 452                         lyxerr[Debug::MATHED]
 453                                 << "reading math environment " << i << " "
 454                                 << latex_mathenv[i].name << "\n";
 455
 456                         MathInsetTypes typ = latex_mathenv[i].typ;
 457                         p = new MathMatrixInset(typ);
 458                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 459                         switch (typ) {
 460
 461                                 case LM_OT_SIMPLE: {
 462                                         curr_num   = latex_mathenv[i].numbered;
 463                                         curr_label.erase();
 464                                         mathed_parse_into(m->cell(0), 0);
 465                                         m->numbered(0, curr_num);
 466                                         m->label(0, curr_label);
 467                                         break;
 468                                 }
 469
 470                                 case LM_OT_EQUATION: {
 471                                         curr_num   = latex_mathenv[i].numbered;
 472                                         curr_label.erase();
 473                                         mathed_parse_into(m->cell(0), FLAG_END);
 474                                         m->numbered(0, curr_num);
 475                                         m->label(0, curr_label);
 476                                         break;
 477                                 }
 478
 479                                 case LM_OT_EQNARRAY: {
 480                                         mathed_parse_lines(m, 3, latex_mathenv[i].numbered, true);
 481                                         break;
 482                                 }
 483
 484                                 case LM_OT_ALIGN: {
 485                                         m->halign(lexArg('{'));
 486                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 487                                         break;
 488                                 }
 489
 490                                 case LM_OT_ALIGNAT: {
 491                                         m->halign(lexArg('{'));
 492                                         mathed_parse_lines(m, 2, latex_mathenv[i].numbered, true);
 493                                         break;
 494                                 }
 495
 496                                 default:
 497                                         lyxerr[Debug::MATHED]
 498                                                 << "1: unknown math environment: " << typ << "\n";
 499                         }
 500
 501                         p->setName(latex_mathenv[i].basename);
 502
 503                         break;
 504                 }
 505
 506                 default:
 507                         lyxerr[Debug::MATHED]
 508                                 << "2 unknown math environment: " << t << "\n";
 509         }
 510
 511         return p;
 512 }
 513
 514
 515 void handle_frac(MathArray & array, string const & name)
 516 {
 517         MathFracInset * p = new MathFracInset(name);
 518         mathed_parse_into(p->cell(0), FLAG_ITEM);
 519         mathed_parse_into(p->cell(1), FLAG_ITEM);
 520         array.push_back(p);
 521 }
 522
 523
 524 void mathed_parse_into(MathArray & array, unsigned flags)
 525 {
 526         static int plevel = -1;
 527
 528         ++plevel;
 529         MathTextCodes yyvarcode   = LM_TC_VAR;
 530
 531         int  t      = yylex();
 532         bool panic  = false;
 533         int  brace  = 0;
 534         int  limits = 0;
 535
 536         while (t) {
 537                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << yylval.i
 538                 //      << " '" << yytext << "'\n";
 539                 //array.dump(lyxerr);
 540                 //lyxerr << "\n";
 541
 542                 if (flags & FLAG_ITEM) {
 543                         flags &= ~FLAG_ITEM;
 544                         if (t == LM_TK_OPEN) {
 545                                 // skip the brace and regard everything to the next matching
 546                                 // closing brace
 547                                 t = yylex();
 548                                 ++brace;
 549                                 flags |= FLAG_BRACE_LAST;
 550                         } else {
 551                                 // regard only this single token
 552                                 flags |= FLAG_LEAVE;
 553                         }
 554                 }
 555
 556                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 557                         mathPrintError(
 558                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 559                         panic = true;
 560                         break;
 561                 }
 562
 563                 switch (t) {
 564
 565                 case LM_TK_ALPHA:
 566                         if (!isspace(yylval.i) || yyvarcode == LM_TC_TEXTRM)
 567                                 array.push_back(yylval.i, yyvarcode);
 568                         break;
 569
 570                 case LM_TK_ARGUMENT: {
 571                         MathMacroArgument * p = new MathMacroArgument(yylval.i);
 572                         p->code(yyvarcode);
 573                         array.push_back(p);
 574                         break;
 575                 }
 576
 577                 case LM_TK_SPECIAL:
 578                         array.push_back(yylval.i, LM_TC_SPECIAL);
 579                         break;
 580
 581                 case LM_TK_STR:
 582                         array.push_back(yylval.i, LM_TC_CONST);
 583                         break;
 584
 585                 case LM_TK_OPEN:
 586                         ++brace;
 587                         if (flags & FLAG_BRACE)
 588                                 flags &= ~FLAG_BRACE;
 589                         else
 590                                 array.push_back('{', LM_TC_TEX);
 591                         break;
 592
 593                 case LM_TK_CLOSE:
 594                         --brace;
 595                         if (brace < 0) {
 596                                 mathPrintError("Unmatching braces");
 597                                 panic = true;
 598                                 break;
 599                         }
 600                         if (flags & FLAG_BRACE_FONT) {
 601                                 yyvarcode = LM_TC_VAR;
 602                                 flags &= ~FLAG_BRACE_FONT;
 603                                 break;
 604                         }
 605                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 606                                 flags |= FLAG_LEAVE;
 607                         else
 608                                 array.push_back('}', LM_TC_TEX);
 609                         break;
 610
 611                 case '[':
 612                         array.push_back('[', LM_TC_CONST);
 613                         break;
 614
 615                 case ']':
 616                         if (flags & FLAG_BRACK_END)
 617                                 flags |= FLAG_LEAVE;
 618                         else
 619                                 array.push_back(']', LM_TC_CONST);
 620                         break;
 621
 622                 case '^':
 623                         mathed_parse_into(
 624                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 625                         break;
 626
 627                 case '_':
 628                         mathed_parse_into(
 629                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 630                         break;
 631
 632                 case LM_TK_LIMIT:
 633                         limits = yylval.l->id;
 634                         //lyxerr << "setting limit to " << limits << "\n";
 635                         break;
 636
 637                 case '&':
 638                         if (flags & FLAG_AMPERSAND) {
 639                                 flags &= ~FLAG_AMPERSAND;
 640                                 --plevel;
 641                                 return;
 642                         }
 643                         lyxerr[Debug::MATHED]
 644                                 << "found tab unexpectedly, array: '" << array << "'\n";
 645                         break;
 646
 647                 case LM_TK_NEWLINE:
 648                         if (flags & FLAG_NEWLINE) {
 649                                 flags &= ~FLAG_NEWLINE;
 650                                 --plevel;
 651                                 return;
 652                         }
 653                         lyxerr[Debug::MATHED]
 654                                 << "found newline unexpectedly, array: '" << array << "'\n";
 655                         break;
 656
 657                 case LM_TK_PROTECT:
 658                         break;
 659
 660                 case LM_TK_BIGSYM:
 661                 case LM_TK_SYM:
 662                 case LM_TK_FUNCLIM:
 663                         limits = 0;
 664                         array.push_back(new MathSymbolInset(yylval.l));
 665                         break;
 666
 667                 case LM_TK_BOP:
 668                         array.push_back(yylval.i, LM_TC_BOP);
 669                         break;
 670
 671                 case LM_TK_SPACE:
 672                         if (yylval.i >= 0)
 673                                 array.push_back(new MathSpaceInset(yylval.i));
 674                         break;
 675
 676                 case LM_TK_DOTS:
 677                         array.push_back(new MathDotsInset(yylval.l));
 678                         break;
 679
 680                 case LM_TK_CHOOSE:
 681                         handle_frac(array, "atop");
 682                         break;
 683
 684                 case LM_TK_STACK:
 685                         handle_frac(array, "stackrel");
 686                         break;
 687
 688                 case LM_TK_FRAC:
 689                         handle_frac(array, "frac");
 690                         break;
 691
 692                 case LM_TK_SQRT:
 693                 {
 694                         unsigned char c = getuchar(yyis);
 695                         if (c == '[') {
 696                                 array.push_back(new MathRootInset);
 697                                 mathed_parse_into(array.back_inset()->cell(0), FLAG_BRACK_END);
 698                                 mathed_parse_into(array.back_inset()->cell(1), FLAG_ITEM);
 699                         } else {
 700                                 yyis->putback(c);
 701                                 array.push_back(new MathSqrtInset);
 702                                 mathed_parse_into(array.back_inset()->cell(0), FLAG_ITEM);
 703                         }
 704                         break;
 705                 }
 706
 707                 case LM_TK_LEFT:
 708                 {
 709                         int ld = yylex();
 710                         if (ld == LM_TK_SYM)
 711                                 ld = yylval.l->id;
 712                         else if (ld == LM_TK_STR || ld == LM_TK_BOP || ld == LM_TK_SPECIAL)
 713                                 ld = yylval.i;
 714
 715                         MathArray ar;
 716                         mathed_parse_into(ar, FLAG_RIGHT);
 717
 718                         int rd = yylex();
 719                         if (rd == LM_TK_SYM)
 720                                 rd = yylval.l->id;
 721                         else if (rd == LM_TK_STR || rd == LM_TK_BOP || rd == LM_TK_SPECIAL)
 722                                 rd = yylval.i;
 723
 724                         MathDelimInset * dl = new MathDelimInset(ld, rd);
 725                         dl->cell(0) = ar;
 726                         array.push_back(dl);
 727                         break;
 728                 }
 729
 730                 case LM_TK_RIGHT:
 731                         if (flags & FLAG_RIGHT) {
 732                                 --plevel;
 733                                 return;
 734                         }
 735                         mathPrintError("Unmatched right delimiter");
 736 //        panic = true;
 737                         break;
 738
 739                 case LM_TK_FONT:
 740                         yyvarcode = static_cast<MathTextCodes>(yylval.l->id);
 741                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 742                         break;
 743
 744                 case LM_TK_STY:
 745                 {
 746                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 747                         //MathArray tmp = array;
 748                         //MathSizeInset * p = new MathSizeInset(MathStyles(yylval.l->id));
 749                         //array.push_back(p);
 750                         //mathed_parse_into(p->cell(0), FLAG_BRACE_FONT);
 751                         break;
 752                 }
 753
 754
 755                 case LM_TK_DECORATION:
 756                 {
 757                         MathDecorationInset * p = new MathDecorationInset(yylval.l);
 758                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 759                         array.push_back(p);
 760                         break;
 761                 }
 762
 763                 case LM_TK_NONUM:
 764                         curr_num = false;
 765                         break;
 766
 767                 case LM_TK_FUNC:
 768                         array.push_back(new MathSymbolInset(yylval.l));
 769                         break;
 770
 771                 case LM_TK_UNDEF:
 772                         if (MathMacroTable::hasTemplate(yytext)) {
 773                                 MathMacro * m = MathMacroTable::cloneTemplate(yytext);
 774                                 for (int i = 0; i < m->nargs(); ++i)
 775                                         mathed_parse_into(m->cell(i), FLAG_ITEM);
 776                                 array.push_back(m);
 777                                 m->metrics(LM_ST_TEXT);
 778                         } else
 779                                 array.push_back(new MathFuncInset(yytext));
 780                         break;
 781
 782                 case LM_TK_MATH:
 783                 case LM_TK_END:
 784                         --plevel;
 785                         return;
 786
 787                 case LM_TK_BEGIN:
 788                 {
 789                         int i = yylval.i;
 790                         MathInsetTypes typ = latex_mathenv[i].typ;
 791
 792                         if (typ == LM_OT_MATRIX) {
 793                                 string const valign = lexArg('[') + 'c';
 794                                 string const halign = lexArg('{');
 795                                 //lyxerr << "valign: '" << valign << "'\n";
 796                                 //lyxerr << "halign: '" << halign << "'\n";
 797                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 798                                 m->valign(valign[0]);
 799                                 m->halign(halign);
 800
 801                                 mathed_parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 802                                 array.push_back(m);
 803                                 //lyxerr << "read matrix " << *m << "\n";
 804                                 break;
 805                         } else
 806                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 807                         break;
 808                 }
 809
 810                 case LM_TK_MACRO:
 811                         array.push_back(MathMacroTable::cloneTemplate(yylval.l->name));
 812                         break;
 813
 814                 case LM_TK_LABEL:
 815                         curr_label = lexArg('{', true);
 816                         break;
 817
 818                 default:
 819                         mathPrintError("Unrecognized token");
 820                         lyxerr[Debug::MATHED] << "[" << t << " " << yytext << "]" << endl;
 821                         break;
 822
 823                 } // end of big switch
 824
 825                 if (flags & FLAG_LEAVE) {
 826                         flags &= ~FLAG_LEAVE;
 827                         break;
 828                 }
 829
 830                 if (panic) {
 831                         lyxerr << " Math Panic, expect problems!" << endl;
 832                         //   Search for the end command.
 833                         do {
 834                                 t = yylex();
 835                         } while (yyis->good() && t != LM_TK_END && t);
 836                 } else {
 837                         t = yylex();
 838                 }
 839         }
 840         --plevel;
 841 }
 842
 843 }
 844
 845
 846 MathArray mathed_parse_cell(string const & str)
 847 {
 848         istringstream is(str.c_str());
 849         yyis     = &is;
 850         yylineno = 0;
 851         MathArray ar;
 852         mathed_parse_into(ar, 0);
 853         return ar;
 854 }
 855
 856
 857 MathMacroTemplate * mathed_parse_macro(string const & str)
 858 {
 859         istringstream is(str.c_str());
 860         return mathed_parse_macro(is);
 861 }
 862
 863
 864 MathMatrixInset * mathed_parse_normal(string const & str)
 865 {
 866         istringstream is(str.c_str());
 867         return mathed_parse_normal(is);
 868 }
 869
 870
 871
 872 MathMatrixInset * mathed_parse_normal(istream & is)
 873 {
 874         yyis     = &is;
 875         yylineno = 0;
 876         return mathed_parse_normal();
 877 }
 878
 879
 880 MathMacroTemplate * mathed_parse_macro(istream & is)
 881 {
 882         yyis     = &is;
 883         yylineno = 0;
 884         return mathed_parse_macro();
 885 }
 886
 887
 888
 889 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 890 {
 891         yyis     = &lex.getStream();
 892         yylineno = lex.GetLineNo();
 893
 894         MathMatrixInset * p = mathed_parse_normal();
 895
 896         // Update line number
 897         lex.setLineNo(yylineno);
 898
 899         // reading of end_inset
 900         while (lex.IsOK()) {
 901                 lex.nextToken();
 902                 if (lex.GetString() == "\\end_inset")
 903                         break;
 904                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 905                         " or missing \\end_inset!" << endl;
 906         }
 907
 908         return p;
 909 }
 910
 911 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 912 {
 913         yyis     = &lex.getStream();
 914         yylineno = lex.GetLineNo();
 915
 916         MathMacroTemplate * p = mathed_parse_macro();
 917
 918         // Update line number
 919         lex.setLineNo(yylineno);
 920
 921         // reading of end_inset
 922         while (lex.IsOK()) {
 923                 lex.nextToken();
 924                 if (lex.GetString() == "\\end_inset")
 925                         break;
 926                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 927                         " or missing \\end_inset!" << endl;
 928         }
 929
 930         return p;
 931 }
 932 //]})