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 #include <config.h>
  19
  20 #include <cctype>
  21
  22 #ifdef __GNUG__
  23 #pragma implementation
  24 #endif
  25
  26 #include "math_parser.h"
  27 #include "array.h"
  28 #include "math_inset.h"
  29 #include "math_arrayinset.h"
  30 #include "math_charinset.h"
  31 #include "math_deliminset.h"
  32 #include "math_factory.h"
  33 #include "math_fracinset.h"
  34 #include "math_funcinset.h"
  35 #include "math_macro.h"
  36 #include "math_macrotable.h"
  37 #include "math_macrotemplate.h"
  38 #include "math_matrixinset.h"
  39 #include "math_rootinset.h"
  40 #include "math_scopeinset.h"
  41 #include "math_sqrtinset.h"
  42 #include "math_scriptinset.h"
  43 #include "math_sqrtinset.h"
  44 #include "debug.h"
  45 #include "support.h"
  46 #include "lyxlex.h"
  47 #include "support/lstrings.h"
  48
  49 using std::istream;
  50 using std::endl;
  51
  52
  53 namespace {
  54
  55 MathScriptInset * prevScriptInset(MathArray const & array)
  56 {
  57         MathInset * p = array.back();
  58         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
  59 }
  60
  61
  62 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
  63 {
  64         MathScriptInset * p = prevScriptInset(array);
  65         if (!p) {
  66                 MathInset * b = array.back();
  67                 if (b && b->isScriptable()) {
  68                         p = new MathScriptInset(up, down, b->clone());
  69                         array.pop_back();
  70                 } else {
  71                         p = new MathScriptInset(up, down);
  72                 }
  73                 array.push_back(p);
  74         }
  75         if (up)
  76                 p->up(true);
  77         if (down)
  78                 p->down(down);
  79         if (limits)
  80                 p->limits(limits);
  81         return p;
  82 }
  83
  84
  85 // These are lexical codes, not semantic
  86 enum lexcode_enum {
  87         LexESC,
  88         LexAlpha,
  89         LexBOP,         // Binary operators or relations
  90         LexComment,
  91         LexArgument,
  92         LexSpace,
  93         LexNewLine,
  94         LexOther,
  95         LexMath,
  96         LexSelf
  97 };
  98
  99 lexcode_enum lexcode[256];
 100
 101
 102 const unsigned char LM_TK_OPEN  = '{';
 103 const unsigned char LM_TK_CLOSE = '}';
 104
 105 enum {
 106         FLAG_BRACE      = 1 << 0,  //  an opening brace needed
 107         FLAG_BRACE_LAST = 1 << 1,  //  last closing brace ends the parsing process
 108         FLAG_RIGHT      = 1 << 2,  //  next right ends the parsing process
 109         FLAG_END        = 1 << 3,  //  next end ends the parsing process
 110         FLAG_BRACK_END  = 1 << 4,  //  next closing bracket ends the parsing process
 111         FLAG_AMPERSAND  = 1 << 5,  //  next & ends the parsing process
 112         FLAG_NEWLINE    = 1 << 6,  //  next \\ ends the parsing process
 113         FLAG_ITEM       = 1 << 7,  //  read a (possibly braced token)
 114         FLAG_BLOCK      = 1 << 8,  //  next block ends the parsing process
 115         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 116 };
 117
 118
 119 struct latex_mathenv_type {
 120         char const *      name;
 121         char const *      basename;
 122         MathInsetTypes    typ;
 123         bool              numbered;
 124         bool              ams;
 125 };
 126
 127 latex_mathenv_type latex_mathenv[] = {
 128         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 129         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 130         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 131         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 132         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 133         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 134         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 135         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 136         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 137         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 138         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 139         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 140 };
 141
 142 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 143
 144
 145
 146 void lexInit()
 147 {
 148         for (int i = 0; i <= 255; ++i) {
 149                 if (isdigit(i))
 150                         lexcode[i] = LexOther;
 151                 else if (isspace(i))
 152                         lexcode[i] = LexSpace;
 153                 else
 154                         lexcode[i] = LexAlpha;
 155         }
 156
 157         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 158         lexcode['\n'] = LexNewLine;
 159         lexcode['%'] = LexComment;
 160         lexcode['#'] = LexArgument;
 161         lexcode['$'] = LexMath;
 162         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 163                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 164
 165         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 166                 lexcode['?'] = LexOther;
 167
 168         lexcode['\''] = lexcode['@'] = LexAlpha;
 169
 170         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 171                 lexcode['&'] = LexSelf;
 172
 173         lexcode['{'] = LexSelf;
 174         lexcode['}'] = LexSelf;
 175
 176         lexcode['\\'] = LexESC;
 177 }
 178
 179
 180
 181 //
 182 // Helper class for parsing
 183 //
 184
 185
 186 class Parser {
 187 public:
 188         ///
 189         Parser(LyXLex & lex)
 190                 : is_(lex.getStream()), lineno_(lex.getLineNo()), putback_token_(0)
 191         {}
 192         ///
 193         Parser(istream & is)
 194                 : is_(is), lineno_(0), putback_token_(0)
 195         {}
 196
 197         ///
 198         MathMacroTemplate * parse_macro();
 199         ///
 200         MathMatrixInset * parse_normal();
 201         ///
 202         void parse_into(MathArray & array, unsigned flags);
 203         ///
 204         int lineno() const { return lineno_; }
 205         ///
 206         void putback(int token);
 207
 208 private:
 209         ///
 210         int yylex();
 211         ///
 212         string lexArg(unsigned char lf, bool accept_spaces = false);
 213         ///
 214         unsigned char getuchar();
 215         ///
 216         void error(string const & msg);
 217         ///
 218         void parse_lines(MathGridInset * p, int col, bool numbered, bool outmost);
 219         ///
 220         latexkeys const * read_delim();
 221
 222 private:
 223         ///
 224         istream & is_;
 225         ///
 226         int lineno_;
 227
 228         ///
 229         int ival_;
 230         ///
 231         latexkeys const * lval_;
 232         ///
 233         string sval_;
 234
 235         ///
 236         bool   curr_num_;
 237         ///
 238         string curr_label_;
 239         ///
 240         string curr_skip_;
 241
 242         ///
 243         int putback_token_;
 244 };
 245
 246
 247 void Parser::putback(int token)
 248 {
 249         putback_token_ = token;
 250 }
 251
 252
 253 unsigned char Parser::getuchar()
 254 {
 255         char c = 0;
 256         if (!is_.good())
 257                 lyxerr << "The input stream is not well..." << endl;
 258         is_.get(c);
 259         return static_cast<unsigned char>(c);
 260 }
 261
 262
 263 string Parser::lexArg(unsigned char lf, bool accept_spaces = false)
 264 {
 265         string result;
 266         unsigned char c = 0;
 267         while (is_.good()) {
 268                 c = getuchar();
 269                 if (!isspace(c))
 270                         break;
 271         }
 272
 273         if (c != lf) {
 274                 is_.putback(c);
 275                 return result;
 276         }
 277
 278         unsigned char rg = 0;
 279         if (lf == '{') rg = '}';
 280         if (lf == '[') rg = ']';
 281         if (lf == '(') rg = ')';
 282         if (!rg) {
 283                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 284                         << lf << "'" << endl;
 285                 return result;
 286         }
 287
 288         int depth = 1;
 289         do {
 290                 unsigned char c = getuchar();
 291                 if (c == lf)
 292                         ++depth;
 293                 if (c == rg)
 294                         --depth;
 295                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 296                         result += c;
 297         } while (depth > 0 && is_.good());
 298
 299         return result;
 300 }
 301
 302
 303 int Parser::yylex()
 304 {
 305         static bool init_done = false;
 306
 307         if (!init_done) {
 308                 lexInit();
 309                 init_done = true;
 310         }
 311
 312         if (putback_token_) {
 313                 int token = putback_token_;
 314                 putback_token_ = 0;
 315                 return token;
 316         }
 317
 318         while (is_.good()) {
 319                 unsigned char c = getuchar();
 320                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 321
 322                 if (lexcode[c] == LexNewLine) {
 323                         ++lineno_;
 324                         continue;
 325                 }
 326
 327                 if (lexcode[c] == LexComment) {
 328                         do {
 329                                 c = getuchar();
 330                         } while (c != '\n' && is_.good());  // eat comments
 331                 }
 332
 333                 if (lexcode[c] == LexOther) {
 334                         ival_ = c;
 335                         return LM_TK_STR;
 336                 }
 337
 338                 if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 339                         ival_ = c;
 340                         return LM_TK_ALPHA;
 341                 }
 342
 343                 if (lexcode[c] == LexBOP) {
 344                         ival_ = c;
 345                         return LM_TK_BOP;
 346                 }
 347
 348                 if (lexcode[c] == LexMath) {
 349                         ival_ = 0;
 350                         return LM_TK_MATH;
 351                 }
 352
 353                 if (lexcode[c] == LexSelf) {
 354                         return c;
 355                 }
 356
 357                 if (lexcode[c] == LexArgument) {
 358                         c = getuchar();
 359                         ival_ = c - '0';
 360                         return LM_TK_ARGUMENT;
 361                 }
 362
 363                 if (lexcode[c] == LexESC)   {
 364                         c = getuchar();
 365                         //lyxerr << "reading second byte: '" << c << "' code: " << lexcode[c] << endl;
 366                         string s;
 367                         s += c;
 368                         latexkeys const * l = in_word_set(s);
 369                         if (l) {
 370                                 //lyxerr << "found key: " << l << endl;
 371                                 //lyxerr << "found key name: " << l->name << endl;
 372                                 //lyxerr << "found key token: " << l->token << endl;
 373                                 lval_ = l;
 374                                 ival_ = l->id;
 375                                 return l->token;
 376                         }
 377                         if (lexcode[c] == LexAlpha) {
 378                                 sval_.erase();
 379                                 while (lexcode[c] == LexAlpha && is_.good()) {
 380                                         sval_ += c;
 381                                         c = getuchar();
 382                                 }
 383                                 while (lexcode[c] == LexSpace && is_.good())
 384                                         c = getuchar();
 385                                 if (lexcode[c] != LexSpace)
 386                                         is_.putback(c);
 387
 388                                 //lyxerr[Debug::MATHED] << "reading: text '" << sval_ << "'\n";
 389                                 //lyxerr << "reading: text '" << sval_ << "'\n";
 390                                 lval_ = in_word_set(sval_);
 391                                 if (!lval_)
 392                                         return LM_TK_UNDEF;
 393
 394                                 if (lval_->token == LM_TK_BEGIN || lval_->token == LM_TK_END) {
 395                                         string name = lexArg('{');
 396                                         int i = 0;
 397                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 398                                                  ++i;
 399                                         ival_ = i;
 400                                 }
 401                                 return lval_->token;
 402                         }
 403                 }
 404         }
 405         return 0;
 406 }
 407
 408
 409 void Parser::error(string const & msg)
 410 {
 411         lyxerr << "Line ~" << lineno_ << ": Math parse error: " << msg << endl;
 412 }
 413
 414
 415 void Parser::parse_lines(MathGridInset * p, int col, bool numbered, bool outmost)
 416 {
 417         // save global variables
 418         bool   const saved_num   = curr_num_;
 419         string const saved_label = curr_label_;
 420
 421         for (int row = 0; true; ++row) {
 422                 // reset global variables
 423                 curr_num_   = numbered;
 424                 curr_label_.erase();
 425
 426                 // reading a row
 427                 int idx = p->nargs() - p->ncols();
 428                 for (int i = 0; i < col - 1; ++i, ++idx)
 429                         parse_into(p->cell(idx), FLAG_AMPERSAND);
 430                 parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 431
 432                 if (outmost) {
 433                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 434                         m->numbered(row, curr_num_);
 435                         m->label(row, curr_label_);
 436                         if (curr_skip_.size()) {
 437                                 m->vskip(LyXLength(curr_skip_), row);
 438                                 curr_skip_.erase();
 439                         }
 440                 }
 441
 442 #ifdef WITH_WARNINGS
 443 #warning Hack!
 444 #endif
 445                 // no newline
 446                 if (ival_ != -1)
 447                         break;
 448
 449                 p->appendRow();
 450         }
 451
 452         // restore "global" variables
 453         curr_num_   = saved_num;
 454         curr_label_ = saved_label;
 455 }
 456
 457
 458 MathMacroTemplate * Parser::parse_macro()
 459 {
 460         if (yylex() != LM_TK_NEWCOMMAND) {
 461                 lyxerr << "\\newcommand expected\n";
 462                 return 0;
 463         }
 464
 465         string name = lexArg('{').substr(1);
 466         string arg  = lexArg('[');
 467         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 468         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 469         parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 470         return p;
 471 }
 472
 473
 474 MathMatrixInset * Parser::parse_normal()
 475 {
 476         MathMatrixInset * p = 0;
 477         int t = yylex();
 478
 479         switch (t) {
 480                 case LM_TK_MATH:
 481                 case LM_TK_BEGIN: {
 482                         int i = ival_;
 483                         lyxerr[Debug::MATHED]
 484                                 << "reading math environment " << i << " "
 485                                 << latex_mathenv[i].name << "\n";
 486
 487                         MathInsetTypes typ = latex_mathenv[i].typ;
 488                         p = new MathMatrixInset(typ);
 489
 490                         switch (typ) {
 491
 492                                 case LM_OT_SIMPLE: {
 493                                         curr_num_ = latex_mathenv[i].numbered;
 494                                         curr_label_.erase();
 495                                         parse_into(p->cell(0), 0);
 496                                         p->numbered(0, curr_num_);
 497                                         p->label(0, curr_label_);
 498                                         break;
 499                                 }
 500
 501                                 case LM_OT_EQUATION: {
 502                                         curr_num_ = latex_mathenv[i].numbered;
 503                                         curr_label_.erase();
 504                                         parse_into(p->cell(0), FLAG_END);
 505                                         p->numbered(0, curr_num_);
 506                                         p->label(0, curr_label_);
 507                                         break;
 508                                 }
 509
 510                                 case LM_OT_EQNARRAY: {
 511                                         parse_lines(p, 3, latex_mathenv[i].numbered, true);
 512                                         break;
 513                                 }
 514
 515                                 case LM_OT_ALIGN: {
 516                                         p->halign(lexArg('{'));
 517                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 518                                         break;
 519                                 }
 520
 521                                 case LM_OT_ALIGNAT: {
 522                                         p->halign(lexArg('{'));
 523                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 524                                         break;
 525                                 }
 526
 527                                 default:
 528                                         lyxerr[Debug::MATHED]
 529                                                 << "1: unknown math environment: " << typ << "\n";
 530                         }
 531
 532                         break;
 533                 }
 534
 535                 default:
 536                         lyxerr[Debug::MATHED]
 537                                 << "2 unknown math environment: " << t << "\n";
 538         }
 539
 540         return p;
 541 }
 542
 543
 544 latexkeys const * Parser::read_delim()
 545 {
 546         int ld = yylex();
 547         //lyxerr << "found symbol: " << ld << "\n";
 548         latexkeys const * l = in_word_set(".");
 549         switch (ld) {
 550                 case LM_TK_SYM:
 551                 case LM_TK_NOGLYPH:
 552                 case LM_TK_SPECIAL:
 553                 case LM_TK_BEGIN: {
 554                         l = lval_;
 555                         //lyxerr << "found key 1: '" << l << "'\n";
 556                         //lyxerr << "found key 1: '" << l->name << "'\n";
 557                         break;
 558                 }
 559                 case ']':
 560                 case '[': {
 561                         string s;
 562                         s += ld;
 563                         l = in_word_set(s);
 564                         //lyxerr << "found key 2: '" << l->name << "'\n";
 565                         break;
 566                 }
 567                 case LM_TK_STR: {
 568                         string s;
 569                         s += ival_;
 570                         l = in_word_set(s);
 571                         //lyxerr << "found key 2: '" << l->name << "'\n";
 572                 }
 573         }
 574         return l;
 575 }
 576
 577
 578 void Parser::parse_into(MathArray & array, unsigned flags)
 579 {
 580         MathTextCodes yyvarcode   = LM_TC_VAR;
 581
 582         int  t      = yylex();
 583         bool panic  = false;
 584         int  limits = 0;
 585
 586         while (t) {
 587                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << ival_
 588                 //      << " '" << sval_ << "'\n";
 589                 //array.dump(lyxerr);
 590                 //lyxerr << "\n";
 591
 592                 if (flags & FLAG_ITEM) {
 593                         flags &= ~FLAG_ITEM;
 594                         if (t == LM_TK_OPEN) {
 595                                 // skip the brace and collect everything to the next matching
 596                                 // closing brace
 597                                 flags |= FLAG_BRACE_LAST;
 598                                 t = yylex();
 599                         } else {
 600                                 // take only this single token
 601                                 flags |= FLAG_LEAVE;
 602                         }
 603                 }
 604
 605                 if (flags & FLAG_BRACE) {
 606                         if (t != LM_TK_OPEN) {
 607                                 error("Expected {. Maybe you forgot to enclose an argument in {}");
 608                                 panic = true;
 609                                 break;
 610                         } else {
 611                                 flags &= ~FLAG_BRACE;
 612                                 t = yylex();
 613                                 continue;
 614                         }
 615                 }
 616
 617                 if (flags & FLAG_BLOCK) {
 618                         if (t == LM_TK_CLOSE || t == '&' ||
 619                             t == LM_TK_NEWLINE || t == LM_TK_END) {
 620                                 putback(t);
 621                                 return;
 622                         }
 623                 }
 624
 625
 626                 switch (t) {
 627
 628                 case LM_TK_MATH:
 629                 case LM_TK_END:
 630                         return;
 631
 632                 case LM_TK_ALPHA:
 633                         if (!isspace(ival_) || yyvarcode == LM_TC_TEXTRM)
 634                                 array.push_back(new MathCharInset(ival_, yyvarcode));
 635                         break;
 636
 637                 case LM_TK_ARGUMENT: {
 638                         MathMacroArgument * p = new MathMacroArgument(ival_);
 639                         //p->code(yyvarcode);
 640                         array.push_back(p);
 641                         break;
 642                 }
 643
 644                 case LM_TK_SPECIAL:
 645                         array.push_back(new MathCharInset(ival_, LM_TC_SPECIAL));
 646                         break;
 647
 648                 case LM_TK_STR:
 649                         array.push_back(new MathCharInset(ival_, LM_TC_CONST));
 650                         break;
 651
 652                 case '{':
 653                         //lyxerr << " creating ScopeInset\n";
 654                         array.push_back(new MathScopeInset);
 655                         parse_into(array.back()->cell(0), FLAG_BRACE_LAST);
 656                         break;
 657
 658                 case '}':
 659                         if (flags & FLAG_BRACE_LAST)
 660                                 flags |= FLAG_LEAVE;
 661                         break;
 662
 663                 case '[':
 664                         array.push_back(new MathCharInset('[', LM_TC_CONST));
 665                         break;
 666
 667                 case ']':
 668                         if (flags & FLAG_BRACK_END)
 669                                 flags |= FLAG_LEAVE;
 670                         else
 671                                 array.push_back(new MathCharInset(']', LM_TC_CONST));
 672                         break;
 673
 674                 case '^':
 675                         parse_into(
 676                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 677                         break;
 678
 679                 case '_':
 680                         parse_into(
 681                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 682                         break;
 683
 684                 case LM_TK_LIMIT:
 685                         limits = lval_->id;
 686                         //lyxerr << "setting limit to " << limits << "\n";
 687                         break;
 688
 689                 case '&':
 690                         if (flags & FLAG_AMPERSAND) {
 691                                 flags &= ~FLAG_AMPERSAND;
 692                                 return;
 693                         }
 694                         lyxerr[Debug::MATHED]
 695                                 << "found tab unexpectedly, array: '" << array << "'\n";
 696                         break;
 697
 698                 case LM_TK_NEWLINE:
 699                 {
 700                         curr_skip_ = lexArg('[');
 701                         if (flags & FLAG_NEWLINE) {
 702                                 flags &= ~FLAG_NEWLINE;
 703                                 return;
 704                         }
 705                         lyxerr[Debug::MATHED]
 706                                 << "found newline unexpectedly, array: '" << array << "'\n";
 707                         break;
 708                 }
 709
 710                 case LM_TK_PROTECT:
 711                         break;
 712
 713                 case LM_TK_BOP:
 714                         array.push_back(new MathCharInset(ival_, LM_TC_BOP));
 715                         break;
 716
 717                 case LM_TK_SQRT:
 718                 {
 719                         unsigned char c = getuchar();
 720                         if (c == '[') {
 721                                 array.push_back(new MathRootInset);
 722                                 parse_into(array.back()->cell(0), FLAG_BRACK_END);
 723                                 parse_into(array.back()->cell(1), FLAG_ITEM);
 724                         } else {
 725                                 is_.putback(c);
 726                                 array.push_back(new MathSqrtInset);
 727                                 parse_into(array.back()->cell(0), FLAG_ITEM);
 728                         }
 729                         break;
 730                 }
 731
 732                 case LM_TK_LEFT:
 733                 {
 734                         latexkeys const * l = read_delim();
 735                         MathArray ar;
 736                         parse_into(ar, FLAG_RIGHT);
 737                         latexkeys const * r = read_delim();
 738                         MathDelimInset * dl = new MathDelimInset(l, r);
 739                         dl->cell(0) = ar;
 740                         array.push_back(dl);
 741                         break;
 742                 }
 743
 744                 case LM_TK_RIGHT:
 745                         if (flags & FLAG_RIGHT)
 746                                 return;
 747                         error("Unmatched right delimiter");
 748 //        panic = true;
 749                         break;
 750
 751                 case LM_TK_FONT:
 752                 {
 753                         MathTextCodes t = static_cast<MathTextCodes>(lval_->id);
 754                         MathArray ar;
 755                         parse_into(ar, FLAG_ITEM);
 756                         for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it)
 757                                 (*it)->handleFont(t);
 758                         array.push_back(ar);
 759                         break;
 760                 }
 761
 762                 case LM_TK_OLDFONT:
 763                         yyvarcode = static_cast<MathTextCodes>(lval_->id);
 764                         break;
 765
 766                 case LM_TK_STY:
 767                 {
 768                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 769                         //MathArray tmp = array;
 770                         //MathSizeInset * p = new MathSizeInset(MathStyles(lval_->id));
 771                         //array.push_back(p);
 772                         //parse_into(p->cell(0), FLAG_BRACE_FONT);
 773                         break;
 774                 }
 775
 776                 case LM_TK_NONUM:
 777                         curr_num_ = false;
 778                         break;
 779
 780                 case LM_TK_UNDEF:
 781                         if (MathMacroTable::hasTemplate(sval_)) {
 782                                 MathMacro * m = MathMacroTable::cloneTemplate(sval_);
 783                                 for (int i = 0; i < m->nargs(); ++i)
 784                                         parse_into(m->cell(i), FLAG_ITEM);
 785                                 array.push_back(m);
 786                                 m->metrics(LM_ST_TEXT);
 787                         } else
 788                                 array.push_back(new MathFuncInset(sval_));
 789                         break;
 790
 791                 case LM_TK_BEGIN:
 792                 {
 793                         int i = ival_;
 794                         MathInsetTypes typ = latex_mathenv[i].typ;
 795
 796                         if (typ == LM_OT_MATRIX) {
 797                                 string const valign = lexArg('[') + 'c';
 798                                 string const halign = lexArg('{');
 799                                 //lyxerr << "valign: '" << valign << "'\n";
 800                                 //lyxerr << "halign: '" << halign << "'\n";
 801                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 802                                 m->valign(valign[0]);
 803                                 m->halign(halign);
 804
 805                                 parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 806                                 array.push_back(m);
 807                                 //lyxerr << "read matrix " << *m << "\n";
 808                                 break;
 809                         } else
 810                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 811                         break;
 812                 }
 813
 814                 case LM_TK_LABEL:
 815                         curr_label_ = lexArg('{', true);
 816                         break;
 817
 818                 case LM_TK_OVER:
 819                 {
 820                         MathFracInset * p = new MathFracInset;
 821                         p->cell(0).swap(array);
 822                         array.push_back(p);
 823                         parse_into(p->cell(1), FLAG_BLOCK);
 824                         break;
 825                 }
 826
 827                 default:
 828                         limits = 0;
 829                         MathInset * p = createMathInset(lval_);
 830                         if (p) {
 831                                 for (int i = 0; i < p->nargs(); ++i)
 832                                         parse_into(p->cell(i), FLAG_ITEM);
 833                                 array.push_back(p);
 834                         } else {
 835                                 error("Unrecognized token");
 836                                 //lyxerr[Debug::MATHED] << "[" << t << " " << sval_ << "]\n";
 837                                 lyxerr << "[" << t << " " << sval_ << "]\n";
 838                         }
 839
 840                 } // end of big switch
 841
 842                 if (flags & FLAG_LEAVE) {
 843                         flags &= ~FLAG_LEAVE;
 844                         break;
 845                 }
 846
 847                 if (panic) {
 848                         lyxerr << " Math Panic, expect problems!\n";
 849                         //   Search for the end command.
 850                         do {
 851                                 t = yylex();
 852                         } while (is_.good() && t != LM_TK_END && t);
 853                 } else {
 854                         t = yylex();
 855                 }
 856         }
 857 }
 858
 859
 860 void parse_end(LyXLex & lex, int lineno)
 861 {
 862         // Update line number
 863         lex.setLineNo(lineno);
 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                 lyxerr << "InsetFormula::Read: Garbage before \\end_inset,"
 872                         " or missing \\end_inset!\n";
 873         }
 874 }
 875
 876 } // anonymous namespace
 877
 878
 879
 880 MathArray mathed_parse_cell(string const & str)
 881 {
 882         istringstream is(str.c_str());
 883         Parser parser(is);
 884         MathArray ar;
 885         parser.parse_into(ar, 0);
 886         return ar;
 887 }
 888
 889
 890
 891 MathMacroTemplate * mathed_parse_macro(string const & str)
 892 {
 893         istringstream is(str.c_str());
 894         Parser parser(is);
 895         return parser.parse_macro();
 896 }
 897
 898 MathMacroTemplate * mathed_parse_macro(istream & is)
 899 {
 900         Parser parser(is);
 901         return parser.parse_macro();
 902 }
 903
 904 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 905 {
 906         Parser parser(lex);
 907         MathMacroTemplate * p = parser.parse_macro();
 908         parse_end(lex, parser.lineno());
 909         return p;
 910 }
 911
 912
 913
 914 MathMatrixInset * mathed_parse_normal(string const & str)
 915 {
 916         istringstream is(str.c_str());
 917         Parser parser(is);
 918         return parser.parse_normal();
 919 }
 920
 921 MathMatrixInset * mathed_parse_normal(istream & is)
 922 {
 923         Parser parser(is);
 924         return parser.parse_normal();
 925 }
 926
 927 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 928 {
 929         Parser parser(lex);
 930         MathMatrixInset * p = parser.parse_normal();
 931         parse_end(lex, parser.lineno());
 932         return p;
 933 }