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_funcinset.h"
  34 #include "math_macro.h"
  35 #include "math_macrotable.h"
  36 #include "math_macrotemplate.h"
  37 #include "math_matrixinset.h"
  38 #include "math_rootinset.h"
  39 #include "math_scopeinset.h"
  40 #include "math_sqrtinset.h"
  41 #include "math_scriptinset.h"
  42 #include "math_sqrtinset.h"
  43 #include "debug.h"
  44 #include "support.h"
  45 #include "lyxlex.h"
  46 #include "support/lstrings.h"
  47
  48 using std::istream;
  49 using std::endl;
  50
  51
  52 namespace {
  53
  54 MathScriptInset * prevScriptInset(MathArray const & array)
  55 {
  56         MathInset * p = array.back();
  57         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
  58 }
  59
  60
  61 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
  62 {
  63         MathScriptInset * p = prevScriptInset(array);
  64         if (!p) {
  65                 MathInset * b = array.back();
  66                 if (b && b->isScriptable()) {
  67                         p = new MathScriptInset(up, down, b->clone());
  68                         array.pop_back();
  69                 } else {
  70                         p = new MathScriptInset(up, down);
  71                 }
  72                 array.push_back(p);
  73         }
  74         if (up)
  75                 p->up(true);
  76         if (down)
  77                 p->down(down);
  78         if (limits)
  79                 p->limits(limits);
  80         return p;
  81 }
  82
  83
  84 // These are lexical codes, not semantic
  85 enum lexcode_enum {
  86         LexESC,
  87         LexAlpha,
  88         LexBOP,         // Binary operators or relations
  89         LexComment,
  90         LexArgument,
  91         LexSpace,
  92         LexNewLine,
  93         LexOther,
  94         LexMath,
  95         LexSelf
  96 };
  97
  98 lexcode_enum lexcode[256];
  99
 100
 101 const unsigned char LM_TK_OPEN  = '{';
 102
 103 enum {
 104         FLAG_BRACE      = 1 << 0,  //  an opening brace needed
 105         FLAG_BRACE_LAST = 1 << 1,  //  last closing brace ends the parsing process
 106         FLAG_RIGHT      = 1 << 2,  //  next right ends the parsing process
 107         FLAG_END        = 1 << 3,  //  next end ends the parsing process
 108         FLAG_BRACK_END  = 1 << 4,  //  next closing bracket ends the parsing process
 109         FLAG_AMPERSAND  = 1 << 5,  //  next & ends the parsing process
 110         FLAG_NEWLINE    = 1 << 6,  //  next \\ ends the parsing process
 111         FLAG_ITEM       = 1 << 7,  //  read a (possibly braced token)
 112         FLAG_BLOCK      = 1 << 8,  //  next block ends the parsing process
 113         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 114 };
 115
 116
 117 struct latex_mathenv_type {
 118         char const *      name;
 119         char const *      basename;
 120         MathInsetTypes    typ;
 121         bool              numbered;
 122         bool              ams;
 123 };
 124
 125 latex_mathenv_type latex_mathenv[] = {
 126         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 127         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 128         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 129         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 130         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 131         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 132         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 133         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 134         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 135         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 136         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 137         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 138 };
 139
 140 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 141
 142
 143
 144 void lexInit()
 145 {
 146         for (int i = 0; i <= 255; ++i) {
 147                 if (isdigit(i))
 148                         lexcode[i] = LexOther;
 149                 else if (isspace(i))
 150                         lexcode[i] = LexSpace;
 151                 else
 152                         lexcode[i] = LexAlpha;
 153         }
 154
 155         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 156         lexcode['\n'] = LexNewLine;
 157         lexcode['%'] = LexComment;
 158         lexcode['#'] = LexArgument;
 159         lexcode['$'] = LexMath;
 160         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 161                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 162
 163         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 164                 lexcode['?'] = LexOther;
 165
 166         lexcode['\''] = lexcode['@'] = LexAlpha;
 167
 168         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 169                 lexcode['&'] = LexSelf;
 170
 171         lexcode['{'] = LexSelf;
 172         lexcode['}'] = LexSelf;
 173
 174         lexcode['\\'] = LexESC;
 175 }
 176
 177
 178
 179 //
 180 // Helper class for parsing
 181 //
 182
 183
 184 class Parser {
 185 public:
 186         ///
 187         Parser(LyXLex & lex) : is_(lex.getStream()), lineno_(lex.getLineNo()) {}
 188         ///
 189         Parser(istream & is) : is_(is), lineno_(0) {}
 190
 191         ///
 192         MathMacroTemplate * parse_macro();
 193         ///
 194         MathMatrixInset * parse_normal();
 195         ///
 196         void parse_into(MathArray & array, unsigned flags);
 197         ///
 198         int lineno() const { return lineno_; }
 199
 200 private:
 201         ///
 202         int yylex();
 203         ///
 204         string lexArg(unsigned char lf, bool accept_spaces = false);
 205         ///
 206         unsigned char getuchar();
 207         ///
 208         void error(string const & msg);
 209         ///
 210         void parse_lines(MathGridInset * p, int col, bool numbered, bool outmost);
 211         ///
 212         latexkeys const * read_delim();
 213
 214 private:
 215         ///
 216         istream & is_;
 217         ///
 218         int lineno_;
 219
 220         ///
 221         int ival_;
 222         ///
 223         latexkeys const * lval_;
 224         ///
 225         string sval_;
 226
 227         ///
 228         bool   curr_num_;
 229         ///
 230         string curr_label_;
 231         ///
 232         string curr_skip_;
 233 };
 234
 235
 236 unsigned char Parser::getuchar()
 237 {
 238         char c = 0;
 239         if (!is_.good())
 240                 lyxerr << "The input stream is not well..." << endl;
 241         is_.get(c);
 242         return static_cast<unsigned char>(c);
 243 }
 244
 245
 246 string Parser::lexArg(unsigned char lf, bool accept_spaces = false)
 247 {
 248         string result;
 249         unsigned char c = 0;
 250         while (is_.good()) {
 251                 c = getuchar();
 252                 if (!isspace(c))
 253                         break;
 254         }
 255
 256         if (c != lf) {
 257                 is_.putback(c);
 258                 return result;
 259         }
 260
 261         unsigned char rg = 0;
 262         if (lf == '{') rg = '}';
 263         if (lf == '[') rg = ']';
 264         if (lf == '(') rg = ')';
 265         if (!rg) {
 266                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 267                         << lf << "'" << endl;
 268                 return result;
 269         }
 270
 271         int depth = 1;
 272         do {
 273                 unsigned char c = getuchar();
 274                 if (c == lf)
 275                         ++depth;
 276                 if (c == rg)
 277                         --depth;
 278                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 279                         result += c;
 280         } while (depth > 0 && is_.good());
 281
 282         return result;
 283 }
 284
 285
 286 int Parser::yylex()
 287 {
 288         static bool init_done = false;
 289
 290         if (!init_done) {
 291                 lexInit();
 292                 init_done = true;
 293         }
 294
 295         while (is_.good()) {
 296                 unsigned char c = getuchar();
 297                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 298
 299                 if (lexcode[c] == LexNewLine) {
 300                         ++lineno_;
 301                         continue;
 302                 } else if (lexcode[c] == LexComment) {
 303                         do {
 304                                 c = getuchar();
 305                         } while (c != '\n' && is_.good());  // eat comments
 306                 } else if (lexcode[c] == LexOther) {
 307                         ival_ = c;
 308                         return LM_TK_STR;
 309                 } else if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 310                         ival_ = c;
 311                         return LM_TK_ALPHA;
 312                 } else if (lexcode[c] == LexBOP) {
 313                         ival_ = c;
 314                         return LM_TK_BOP;
 315                 } else if (lexcode[c] == LexMath) {
 316                         ival_ = 0;
 317                         return LM_TK_MATH;
 318                 } else if (lexcode[c] == LexSelf) {
 319                         return c;
 320                 } else if (lexcode[c] == LexArgument) {
 321                         c = getuchar();
 322                         ival_ = c - '0';
 323                         return LM_TK_ARGUMENT;
 324                 } else if (lexcode[c] == LexESC)   {
 325                         c = getuchar();
 326                         //lyxerr << "reading second byte: '" << c << "' code: " << lexcode[c] << endl;
 327                         string s;
 328                         s += c;
 329                         latexkeys const * l = in_word_set(s);
 330                         if (l) {
 331                                 //lyxerr << "found key: " << l << endl;
 332                                 //lyxerr << "found key name: " << l->name << endl;
 333                                 //lyxerr << "found key token: " << l->token << endl;
 334                                 lval_ = l;
 335                                 ival_ = l->id;
 336                                 return l->token;
 337                         }
 338                         if (lexcode[c] == LexAlpha) {
 339                                 sval_.erase();
 340                                 while (lexcode[c] == LexAlpha && is_.good()) {
 341                                         sval_ += c;
 342                                         c = getuchar();
 343                                 }
 344                                 while (lexcode[c] == LexSpace && is_.good())
 345                                         c = getuchar();
 346                                 if (lexcode[c] != LexSpace)
 347                                         is_.putback(c);
 348
 349                                 //lyxerr[Debug::MATHED] << "reading: text '" << sval_ << "'\n";
 350                                 //lyxerr << "reading: text '" << sval_ << "'\n";
 351                                 lval_ = in_word_set(sval_);
 352                                 if (!lval_)
 353                                         return LM_TK_UNDEF;
 354
 355                                 if (lval_->token == LM_TK_BEGIN || lval_->token == LM_TK_END) {
 356                                         string name = lexArg('{');
 357                                         int i = 0;
 358                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 359                                                  ++i;
 360                                         ival_ = i;
 361                                 }
 362                                 return lval_->token;
 363                         }
 364                 }
 365         }
 366         return 0;
 367 }
 368
 369
 370 void Parser::error(string const & msg)
 371 {
 372         lyxerr << "Line ~" << lineno_ << ": Math parse error: " << msg << endl;
 373 }
 374
 375
 376 void Parser::parse_lines(MathGridInset * p, int col, bool numbered, bool outmost)
 377 {
 378         // save global variables
 379         bool   const saved_num   = curr_num_;
 380         string const saved_label = curr_label_;
 381
 382         for (int row = 0; true; ++row) {
 383                 // reset global variables
 384                 curr_num_   = numbered;
 385                 curr_label_.erase();
 386
 387                 // reading a row
 388                 int idx = p->nargs() - p->ncols();
 389                 for (int i = 0; i < col - 1; ++i, ++idx)
 390                         parse_into(p->cell(idx), FLAG_AMPERSAND);
 391                 parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 392
 393                 if (outmost) {
 394                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 395                         m->numbered(row, curr_num_);
 396                         m->label(row, curr_label_);
 397                         if (curr_skip_.size()) {
 398                                 m->vskip(LyXLength(curr_skip_), row);
 399                                 curr_skip_.erase();
 400                         }
 401                 }
 402
 403 #ifdef WITH_WARNINGS
 404 #warning Hack!
 405 #endif
 406                 // no newline
 407                 if (ival_ != -1)
 408                         break;
 409
 410                 p->appendRow();
 411         }
 412
 413         // restore "global" variables
 414         curr_num_   = saved_num;
 415         curr_label_ = saved_label;
 416 }
 417
 418
 419 MathMacroTemplate * Parser::parse_macro()
 420 {
 421         if (yylex() != LM_TK_NEWCOMMAND) {
 422                 lyxerr << "\\newcommand expected\n";
 423                 return 0;
 424         }
 425
 426         string name = lexArg('{').substr(1);
 427         string arg  = lexArg('[');
 428         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 429         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 430         parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 431         return p;
 432 }
 433
 434
 435 MathMatrixInset * Parser::parse_normal()
 436 {
 437         MathMatrixInset * p = 0;
 438         int t = yylex();
 439
 440         switch (t) {
 441                 case LM_TK_MATH:
 442                 case LM_TK_BEGIN: {
 443                         int i = ival_;
 444                         lyxerr[Debug::MATHED]
 445                                 << "reading math environment " << i << " "
 446                                 << latex_mathenv[i].name << "\n";
 447
 448                         MathInsetTypes typ = latex_mathenv[i].typ;
 449                         p = new MathMatrixInset(typ);
 450
 451                         switch (typ) {
 452
 453                                 case LM_OT_SIMPLE: {
 454                                         curr_num_ = latex_mathenv[i].numbered;
 455                                         curr_label_.erase();
 456                                         parse_into(p->cell(0), 0);
 457                                         p->numbered(0, curr_num_);
 458                                         p->label(0, curr_label_);
 459                                         break;
 460                                 }
 461
 462                                 case LM_OT_EQUATION: {
 463                                         curr_num_ = latex_mathenv[i].numbered;
 464                                         curr_label_.erase();
 465                                         parse_into(p->cell(0), FLAG_END);
 466                                         p->numbered(0, curr_num_);
 467                                         p->label(0, curr_label_);
 468                                         break;
 469                                 }
 470
 471                                 case LM_OT_EQNARRAY: {
 472                                         parse_lines(p, 3, latex_mathenv[i].numbered, true);
 473                                         break;
 474                                 }
 475
 476                                 case LM_OT_ALIGN: {
 477                                         p->halign(lexArg('{'));
 478                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 479                                         break;
 480                                 }
 481
 482                                 case LM_OT_ALIGNAT: {
 483                                         p->halign(lexArg('{'));
 484                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 485                                         break;
 486                                 }
 487
 488                                 default:
 489                                         lyxerr[Debug::MATHED]
 490                                                 << "1: unknown math environment: " << typ << "\n";
 491                         }
 492
 493                         break;
 494                 }
 495
 496                 default:
 497                         lyxerr[Debug::MATHED]
 498                                 << "2 unknown math environment: " << t << "\n";
 499         }
 500
 501         return p;
 502 }
 503
 504
 505 latexkeys const * Parser::read_delim()
 506 {
 507         int ld = yylex();
 508         //lyxerr << "found symbol: " << ld << "\n";
 509         latexkeys const * l = in_word_set(".");
 510         switch (ld) {
 511                 case LM_TK_SYM:
 512                 case LM_TK_NOGLYPH:
 513                 case LM_TK_SPECIAL:
 514                 case LM_TK_BEGIN: {
 515                         l = lval_;
 516                         //lyxerr << "found key 1: '" << l << "'\n";
 517                         //lyxerr << "found key 1: '" << l->name << "'\n";
 518                         break;
 519                 }
 520                 case ']':
 521                 case '[': {
 522                         string s;
 523                         s += ld;
 524                         l = in_word_set(s);
 525                         //lyxerr << "found key 2: '" << l->name << "'\n";
 526                         break;
 527                 }
 528                 case LM_TK_STR: {
 529                         string s;
 530                         s += ival_;
 531                         l = in_word_set(s);
 532                         //lyxerr << "found key 2: '" << l->name << "'\n";
 533                 }
 534         }
 535         return l;
 536 }
 537
 538
 539 void Parser::parse_into(MathArray & array, unsigned flags)
 540 {
 541         MathTextCodes yyvarcode   = LM_TC_VAR;
 542
 543         int  t      = yylex();
 544         bool panic  = false;
 545         int  limits = 0;
 546
 547         while (t) {
 548                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << ival_
 549                 //      << " '" << sval_ << "'\n";
 550                 //array.dump(lyxerr);
 551                 //lyxerr << "\n";
 552
 553                 if (flags & FLAG_ITEM) {
 554                         flags &= ~FLAG_ITEM;
 555                         if (t == LM_TK_OPEN) {
 556                                 // skip the brace and collect everything to the next matching
 557                                 // closing brace
 558                                 flags |= FLAG_BRACE_LAST;
 559                                 t = yylex();
 560                         } else {
 561                                 // take only this single token
 562                                 flags |= FLAG_LEAVE;
 563                         }
 564                 }
 565
 566                 if (flags & FLAG_BRACE) {
 567                         if (t != LM_TK_OPEN) {
 568                                 error("Expected {. Maybe you forgot to enclose an argument in {}");
 569                                 panic = true;
 570                                 break;
 571                         } else {
 572                                 flags &= ~FLAG_BRACE;
 573                                 t = yylex();
 574                                 continue;
 575                         }
 576                 }
 577
 578                 switch (t) {
 579
 580                 case LM_TK_MATH:
 581                 case LM_TK_END:
 582                         return;
 583
 584                 case LM_TK_ALPHA:
 585                         if (!isspace(ival_) || yyvarcode == LM_TC_TEXTRM)
 586                                 array.push_back(new MathCharInset(ival_, yyvarcode));
 587                         break;
 588
 589                 case LM_TK_ARGUMENT: {
 590                         MathMacroArgument * p = new MathMacroArgument(ival_);
 591                         //p->code(yyvarcode);
 592                         array.push_back(p);
 593                         break;
 594                 }
 595
 596                 case LM_TK_SPECIAL:
 597                         array.push_back(new MathCharInset(ival_, LM_TC_SPECIAL));
 598                         break;
 599
 600                 case LM_TK_STR:
 601                         array.push_back(new MathCharInset(ival_, LM_TC_CONST));
 602                         break;
 603
 604                 case '{':
 605                         //lyxerr << " creating ScopeInset\n";
 606                         array.push_back(new MathScopeInset);
 607                         parse_into(array.back()->cell(0), FLAG_BRACE_LAST);
 608                         break;
 609
 610                 case '}':
 611                         if (flags & FLAG_BRACE_LAST)
 612                                 flags |= FLAG_LEAVE;
 613                         break;
 614
 615                 case '[':
 616                         array.push_back(new MathCharInset('[', LM_TC_CONST));
 617                         break;
 618
 619                 case ']':
 620                         if (flags & FLAG_BRACK_END)
 621                                 flags |= FLAG_LEAVE;
 622                         else
 623                                 array.push_back(new MathCharInset(']', LM_TC_CONST));
 624                         break;
 625
 626                 case '^':
 627                         parse_into(
 628                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 629                         break;
 630
 631                 case '_':
 632                         parse_into(
 633                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 634                         break;
 635
 636                 case LM_TK_LIMIT:
 637                         limits = lval_->id;
 638                         //lyxerr << "setting limit to " << limits << "\n";
 639                         break;
 640
 641                 case '&':
 642                         if (flags & FLAG_AMPERSAND) {
 643                                 flags &= ~FLAG_AMPERSAND;
 644                                 return;
 645                         }
 646                         lyxerr[Debug::MATHED]
 647                                 << "found tab unexpectedly, array: '" << array << "'\n";
 648                         break;
 649
 650                 case LM_TK_NEWLINE:
 651                 {
 652                         curr_skip_ = lexArg('[');
 653                         if (flags & FLAG_NEWLINE) {
 654                                 flags &= ~FLAG_NEWLINE;
 655                                 return;
 656                         }
 657                         lyxerr[Debug::MATHED]
 658                                 << "found newline unexpectedly, array: '" << array << "'\n";
 659                         break;
 660                 }
 661
 662                 case LM_TK_PROTECT:
 663                         break;
 664
 665                 case LM_TK_BOP:
 666                         array.push_back(new MathCharInset(ival_, LM_TC_BOP));
 667                         break;
 668
 669                 case LM_TK_SQRT:
 670                 {
 671                         unsigned char c = getuchar();
 672                         if (c == '[') {
 673                                 array.push_back(new MathRootInset);
 674                                 parse_into(array.back()->cell(0), FLAG_BRACK_END);
 675                                 parse_into(array.back()->cell(1), FLAG_ITEM);
 676                         } else {
 677                                 is_.putback(c);
 678                                 array.push_back(new MathSqrtInset);
 679                                 parse_into(array.back()->cell(0), FLAG_ITEM);
 680                         }
 681                         break;
 682                 }
 683
 684                 case LM_TK_LEFT:
 685                 {
 686                         latexkeys const * l = read_delim();
 687                         MathArray ar;
 688                         parse_into(ar, FLAG_RIGHT);
 689                         latexkeys const * r = read_delim();
 690                         MathDelimInset * dl = new MathDelimInset(l, r);
 691                         dl->cell(0) = ar;
 692                         array.push_back(dl);
 693                         break;
 694                 }
 695
 696                 case LM_TK_RIGHT:
 697                         if (flags & FLAG_RIGHT)
 698                                 return;
 699                         error("Unmatched right delimiter");
 700 //        panic = true;
 701                         break;
 702
 703                 case LM_TK_FONT:
 704                 {
 705                         MathTextCodes t = static_cast<MathTextCodes>(lval_->id);
 706                         MathArray ar;
 707                         parse_into(ar, FLAG_ITEM);
 708                         for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it)
 709                                 (*it)->handleFont(t);
 710                         array.push_back(ar);
 711                         break;
 712                 }
 713
 714                 case LM_TK_OLDFONT:
 715                         yyvarcode = static_cast<MathTextCodes>(lval_->id);
 716                         break;
 717
 718                 case LM_TK_STY:
 719                 {
 720                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 721                         //MathArray tmp = array;
 722                         //MathSizeInset * p = new MathSizeInset(MathStyles(lval_->id));
 723                         //array.push_back(p);
 724                         //parse_into(p->cell(0), FLAG_BRACE_FONT);
 725                         break;
 726                 }
 727
 728                 case LM_TK_NONUM:
 729                         curr_num_ = false;
 730                         break;
 731
 732                 case LM_TK_UNDEF:
 733                         if (MathMacroTable::hasTemplate(sval_)) {
 734                                 MathMacro * m = MathMacroTable::cloneTemplate(sval_);
 735                                 for (int i = 0; i < m->nargs(); ++i)
 736                                         parse_into(m->cell(i), FLAG_ITEM);
 737                                 array.push_back(m);
 738                                 m->metrics(LM_ST_TEXT);
 739                         } else
 740                                 array.push_back(new MathFuncInset(sval_));
 741                         break;
 742
 743                 case LM_TK_BEGIN:
 744                 {
 745                         int i = ival_;
 746                         MathInsetTypes typ = latex_mathenv[i].typ;
 747
 748                         if (typ == LM_OT_MATRIX) {
 749                                 string const valign = lexArg('[') + 'c';
 750                                 string const halign = lexArg('{');
 751                                 //lyxerr << "valign: '" << valign << "'\n";
 752                                 //lyxerr << "halign: '" << halign << "'\n";
 753                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 754                                 m->valign(valign[0]);
 755                                 m->halign(halign);
 756
 757                                 parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 758                                 array.push_back(m);
 759                                 //lyxerr << "read matrix " << *m << "\n";
 760                                 break;
 761                         } else
 762                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 763                         break;
 764                 }
 765
 766                 case LM_TK_LABEL:
 767                         curr_label_ = lexArg('{', true);
 768                         break;
 769
 770                 case LM_TK_OVER:
 771                 {
 772                         MathArray ar;
 773                         parse_into(ar, FLAG_BLOCK);
 774                         break;
 775                 }
 776
 777                 default:
 778                         limits = 0;
 779                         MathInset * p = createMathInset(lval_);
 780                         if (p) {
 781                                 for (int i = 0; i < p->nargs(); ++i)
 782                                         parse_into(p->cell(i), FLAG_ITEM);
 783                                 array.push_back(p);
 784                         } else {
 785                                 error("Unrecognized token");
 786                                 //lyxerr[Debug::MATHED] << "[" << t << " " << sval_ << "]\n";
 787                                 lyxerr << "[" << t << " " << sval_ << "]\n";
 788                         }
 789
 790                 } // end of big switch
 791
 792                 if (flags & FLAG_LEAVE) {
 793                         flags &= ~FLAG_LEAVE;
 794                         break;
 795                 }
 796
 797                 if (panic) {
 798                         lyxerr << " Math Panic, expect problems!\n";
 799                         //   Search for the end command.
 800                         do {
 801                                 t = yylex();
 802                         } while (is_.good() && t != LM_TK_END && t);
 803                 } else {
 804                         t = yylex();
 805                 }
 806         }
 807 }
 808
 809
 810 void parse_end(LyXLex & lex, int lineno)
 811 {
 812         // Update line number
 813         lex.setLineNo(lineno);
 814
 815         // reading of end_inset
 816         while (lex.isOK()) {
 817                 lex.nextToken();
 818                 if (lex.getString() == "\\end_inset")
 819                         break;
 820                 //lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 821                 lyxerr << "InsetFormula::Read: Garbage before \\end_inset,"
 822                         " or missing \\end_inset!\n";
 823         }
 824 }
 825
 826 } // anonymous namespace
 827
 828
 829
 830 MathArray mathed_parse_cell(string const & str)
 831 {
 832         istringstream is(str.c_str());
 833         Parser parser(is);
 834         MathArray ar;
 835         parser.parse_into(ar, 0);
 836         return ar;
 837 }
 838
 839
 840
 841 MathMacroTemplate * mathed_parse_macro(string const & str)
 842 {
 843         istringstream is(str.c_str());
 844         Parser parser(is);
 845         return parser.parse_macro();
 846 }
 847
 848 MathMacroTemplate * mathed_parse_macro(istream & is)
 849 {
 850         Parser parser(is);
 851         return parser.parse_macro();
 852 }
 853
 854 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 855 {
 856         Parser parser(lex);
 857         MathMacroTemplate * p = parser.parse_macro();
 858         parse_end(lex, parser.lineno());
 859         return p;
 860 }
 861
 862
 863
 864 MathMatrixInset * mathed_parse_normal(string const & str)
 865 {
 866         istringstream is(str.c_str());
 867         Parser parser(is);
 868         return parser.parse_normal();
 869 }
 870
 871 MathMatrixInset * mathed_parse_normal(istream & is)
 872 {
 873         Parser parser(is);
 874         return parser.parse_normal();
 875 }
 876
 877 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 878 {
 879         Parser parser(lex);
 880         MathMatrixInset * p = parser.parse_normal();
 881         parse_end(lex, parser.lineno());
 882         return p;
 883 }