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_bigopinset.h"
  31 #include "math_charinset.h"
  32 #include "math_dotsinset.h"
  33 #include "math_decorationinset.h"
  34 #include "math_deliminset.h"
  35 #include "math_fracinset.h"
  36 #include "math_funcinset.h"
  37 #include "math_funcliminset.h"
  38 #include "math_macro.h"
  39 #include "math_macrotable.h"
  40 #include "math_macrotemplate.h"
  41 #include "math_matrixinset.h"
  42 #include "math_noglyphinset.h"
  43 #include "math_rootinset.h"
  44 #include "math_scriptinset.h"
  45 #include "math_sizeinset.h"
  46 #include "math_spaceinset.h"
  47 #include "math_sqrtinset.h"
  48 #include "math_stackrelinset.h"
  49 #include "math_symbolinset.h"
  50 #include "debug.h"
  51 #include "mathed/support.h"
  52 #include "lyxlex.h"
  53 #include "support/lstrings.h"
  54
  55 using std::istream;
  56 using std::endl;
  57
  58
  59 namespace {
  60
  61 MathScriptInset * prevScriptInset(MathArray const & array)
  62 {
  63         MathInset * p = array.back();
  64         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
  65 }
  66
  67
  68 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
  69 {
  70         MathScriptInset * p = prevScriptInset(array);
  71         if (!p) {
  72                 MathInset * b = array.back();
  73                 if (b && b->isScriptable()) {
  74                         p = new MathScriptInset(up, down, b->clone());
  75                         array.pop_back();
  76                 } else {
  77                         p = new MathScriptInset(up, down);
  78                 }
  79                 array.push_back(p);
  80         }
  81         if (up)
  82                 p->up(true);
  83         if (down)
  84                 p->down(down);
  85         if (limits)
  86                 p->limits(limits);
  87         return p;
  88 }
  89
  90
  91 // These are lexical codes, not semantic
  92 enum lexcode_enum {
  93         LexNone,
  94         LexESC,
  95         LexAlpha,
  96         LexBOP,         // Binary operators or relations
  97         LexOpen,
  98         LexClose,
  99         LexComment,
 100         LexArgument,
 101         LexSpace,
 102         LexNewLine,
 103         LexOther,
 104         LexMath,
 105         LexSelf
 106 };
 107
 108 lexcode_enum lexcode[256];
 109
 110
 111 const unsigned char LM_TK_OPEN  = '{';
 112 const unsigned char LM_TK_CLOSE = '}';
 113
 114 enum {
 115         FLAG_BRACE      = 1 << 0,  //  A { needed              //}
 116         FLAG_BRACE_LAST = 1 << 1,  //  // { Last } ends the parsing process
 117         FLAG_RIGHT      = 1 << 2,  //  Next right ends the parsing process
 118         FLAG_END        = 1 << 3,  //  Next end ends the parsing process
 119         FLAG_BRACE_FONT = 1 << 4,  //  // { Next } closes a font
 120         FLAG_BRACK_END  = 1 << 5,  //  // [ Next ] ends the parsing process
 121         FLAG_AMPERSAND  = 1 << 6,  //  Next & ends the parsing process
 122         FLAG_NEWLINE    = 1 << 7,  //  Next \\ ends the parsing process
 123         FLAG_ITEM       = 1 << 8,  //  read a (possibly braced token)
 124         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 125         FLAG_OPTARG     = 1 << 10  //  reads an argument in []
 126 };
 127
 128
 129 struct latex_mathenv_type {
 130         char const *      name;
 131         char const *      basename;
 132         MathInsetTypes    typ;
 133         bool              numbered;
 134         bool              ams;
 135 };
 136
 137 latex_mathenv_type latex_mathenv[] = {
 138         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 139         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 140         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 141         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 142         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 143         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 144         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 145         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 146         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 147         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 148         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 149         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 150 };
 151
 152 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 153
 154
 155
 156 void lexInit()
 157 {
 158         for (int i = 0; i <= 255; ++i) {
 159                 if (isdigit(i))
 160                         lexcode[i] = LexOther;
 161                 else if (isspace(i))
 162                         lexcode[i] = LexSpace;
 163                 else
 164                         lexcode[i] = LexAlpha;
 165         }
 166
 167         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 168         lexcode['\n'] = LexNewLine;
 169         lexcode['%'] = LexComment;
 170         lexcode['#'] = LexArgument;
 171         lexcode['$'] = LexMath;
 172         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 173                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 174
 175         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 176                 lexcode['?'] = LexOther;
 177
 178         lexcode['\''] = lexcode['@'] = LexAlpha;
 179
 180         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 181                 lexcode['&'] = LexSelf;
 182
 183         lexcode['\\'] = LexESC;
 184         lexcode['{'] = LexOpen;
 185         lexcode['}'] = LexClose;
 186 }
 187
 188
 189
 190 //
 191 // Helper class for parsing
 192 //
 193
 194
 195 class Parser {
 196 public:
 197         ///
 198         Parser(LyXLex & lex) : is_(lex.getStream()), lineno_(lex.getLineNo()) {}
 199         ///
 200         Parser(istream & is) : is_(is), lineno_(0) {}
 201
 202         ///
 203         MathMacroTemplate * parse_macro();
 204         ///
 205         MathMatrixInset * parse_normal();
 206         ///
 207         void parse_into(MathArray & array, unsigned flags);
 208         ///
 209         int lineno() const { return lineno_; }
 210
 211 private:
 212         ///
 213         int yylex();
 214         ///
 215         string lexArg(unsigned char lf, bool accept_spaces = false);
 216         ///
 217         unsigned char getuchar();
 218         ///
 219         void error(string const & msg);
 220         ///
 221         void parse_lines(MathGridInset * p, int col, bool numbered, bool outmost);
 222         ///
 223         latexkeys const * read_delim();
 224
 225 private:
 226         ///
 227         istream & is_;
 228         ///
 229         int lineno_;
 230
 231         ///
 232         int ival_;
 233         ///
 234         latexkeys const * lval_;
 235         ///
 236         string sval_;
 237
 238         ///
 239         bool   curr_num_;
 240         ///
 241         string curr_label_;
 242         ///
 243         string curr_skip_;
 244 };
 245
 246
 247 unsigned char Parser::getuchar()
 248 {
 249         char c = 0;
 250         if (!is_.good())
 251                 lyxerr << "The input stream is not well..." << endl;
 252         is_.get(c);
 253         return static_cast<unsigned char>(c);
 254 }
 255
 256
 257 string Parser::lexArg(unsigned char lf, bool accept_spaces = false)
 258 {
 259         string result;
 260         unsigned char c = 0;
 261         while (is_.good()) {
 262                 c = getuchar();
 263                 if (!isspace(c))
 264                         break;
 265         }
 266
 267         if (c != lf) {
 268                 is_.putback(c);
 269                 return result;
 270         }
 271
 272         unsigned char rg = 0;
 273         if (lf == '{') rg = '}';
 274         if (lf == '[') rg = ']';
 275         if (lf == '(') rg = ')';
 276         if (!rg) {
 277                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 278                         << lf << "'" << endl;
 279                 return result;
 280         }
 281
 282         int depth = 1;
 283         do {
 284                 unsigned char c = getuchar();
 285                 if (c == lf)
 286                         ++depth;
 287                 if (c == rg)
 288                         --depth;
 289                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 290                         result += c;
 291         } while (depth > 0 && is_.good());
 292
 293         return result;
 294 }
 295
 296
 297 int Parser::yylex()
 298 {
 299         static bool init_done = false;
 300
 301         if (!init_done) {
 302                 lexInit();
 303                 init_done = true;
 304         }
 305
 306         while (is_.good()) {
 307                 unsigned char c = getuchar();
 308                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 309
 310                 if (lexcode[c] == LexNewLine) {
 311                         ++lineno_;
 312                         continue;
 313                 } else if (lexcode[c] == LexComment) {
 314                         do {
 315                                 c = getuchar();
 316                         } while (c != '\n' && is_.good());  // eat comments
 317                 } else if (lexcode[c] == LexOther) {
 318                         ival_ = c;
 319                         return LM_TK_STR;
 320                 } else if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 321                         ival_ = c;
 322                         return LM_TK_ALPHA;
 323                 } else if (lexcode[c] == LexBOP) {
 324                         ival_ = c;
 325                         return LM_TK_BOP;
 326                 } else if (lexcode[c] == LexMath) {
 327                         ival_ = 0;
 328                         return LM_TK_MATH;
 329                 } else if (lexcode[c] == LexSelf) {
 330                         return c;
 331                 } else if (lexcode[c] == LexArgument) {
 332                         c = getuchar();
 333                         ival_ = c - '0';
 334                         return LM_TK_ARGUMENT;
 335                 } else if (lexcode[c] == LexOpen) {
 336                         return LM_TK_OPEN;
 337                 } else if (lexcode[c] == LexClose) {
 338                         return LM_TK_CLOSE;
 339                 } else if (lexcode[c] == LexESC)   {
 340                         c = getuchar();
 341                         //lyxerr << "reading second byte: '" << c << "' code: " << lexcode[c] << endl;
 342                         string s;
 343                         s += c;
 344                         latexkeys const * l = in_word_set(s);
 345                         if (l) {
 346                                 //lyxerr << "found key: " << l << endl;
 347                                 //lyxerr << "found key name: " << l->name << endl;
 348                                 //lyxerr << "found key token: " << l->token << endl;
 349                                 lval_ = l;
 350                                 ival_ = l->id;
 351                                 return l->token;
 352                         }
 353                         if (lexcode[c] == LexAlpha) {
 354                                 sval_.erase();
 355                                 while (lexcode[c] == LexAlpha && is_.good()) {
 356                                         sval_ += c;
 357                                         c = getuchar();
 358                                 }
 359                                 while (lexcode[c] == LexSpace && is_.good())
 360                                         c = getuchar();
 361                                 if (lexcode[c] != LexSpace)
 362                                         is_.putback(c);
 363
 364                                 //lyxerr[Debug::MATHED] << "reading: text '" << sval_ << "'\n";
 365                                 //lyxerr << "reading: text '" << sval_ << "'\n";
 366                                 latexkeys const * l = in_word_set(sval_);
 367                                 if (!l)
 368                                         return LM_TK_UNDEF;
 369
 370                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 371                                         string name = lexArg('{');
 372                                         int i = 0;
 373                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 374                                                  ++i;
 375                                         ival_ = i;
 376                                 } else if (l->token == LM_TK_SPACE)
 377                                         ival_ = l->id;
 378                                 else
 379                                         lval_ = l;
 380                                 return l->token;
 381                         }
 382                 }
 383         }
 384         return 0;
 385 }
 386
 387
 388 void Parser::error(string const & msg)
 389 {
 390         lyxerr << "Line ~" << lineno_ << ": Math parse error: " << msg << endl;
 391 }
 392
 393
 394 void Parser::parse_lines(MathGridInset * p, int col, bool numbered, bool outmost)
 395 {
 396         // save global variables
 397         bool   const saved_num   = curr_num_;
 398         string const saved_label = curr_label_;
 399
 400         for (int row = 0; true; ++row) {
 401                 // reset global variables
 402                 curr_num_   = numbered;
 403                 curr_label_.erase();
 404
 405                 // reading a row
 406                 int idx = p->nargs() - p->ncols();
 407                 for (int i = 0; i < col - 1; ++i, ++idx)
 408                         parse_into(p->cell(idx), FLAG_AMPERSAND);
 409                 parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 410
 411                 if (outmost) {
 412                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 413                         m->numbered(row, curr_num_);
 414                         m->label(row, curr_label_);
 415                         if (curr_skip_.size()) {
 416                                 m->vskip(LyXLength(curr_skip_), row);
 417                                 curr_skip_.erase();
 418                         }
 419                 }
 420
 421 #ifdef WITH_WARNINGS
 422 #warning Hack!
 423 #endif
 424                 // no newline
 425                 if (ival_ != -1)
 426                         break;
 427
 428                 p->appendRow();
 429         }
 430
 431         // restore "global" variables
 432         curr_num_   = saved_num;
 433         curr_label_ = saved_label;
 434 }
 435
 436
 437 MathMacroTemplate * Parser::parse_macro()
 438 {
 439         if (yylex() != LM_TK_NEWCOMMAND) {
 440                 lyxerr << "\\newcommand expected\n";
 441                 return 0;
 442         }
 443
 444         string name = lexArg('{').substr(1);
 445         string arg  = lexArg('[');
 446         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 447         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 448         parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 449         return p;
 450 }
 451
 452
 453 MathMatrixInset * Parser::parse_normal()
 454 {
 455         MathMatrixInset * p = 0;
 456         int t = yylex();
 457
 458         switch (t) {
 459                 case LM_TK_MATH:
 460                 case LM_TK_BEGIN: {
 461                         int i = ival_;
 462                         lyxerr[Debug::MATHED]
 463                                 << "reading math environment " << i << " "
 464                                 << latex_mathenv[i].name << "\n";
 465
 466                         MathInsetTypes typ = latex_mathenv[i].typ;
 467                         p = new MathMatrixInset(typ);
 468
 469                         switch (typ) {
 470
 471                                 case LM_OT_SIMPLE: {
 472                                         curr_num_ = latex_mathenv[i].numbered;
 473                                         curr_label_.erase();
 474                                         parse_into(p->cell(0), 0);
 475                                         p->numbered(0, curr_num_);
 476                                         p->label(0, curr_label_);
 477                                         break;
 478                                 }
 479
 480                                 case LM_OT_EQUATION: {
 481                                         curr_num_ = latex_mathenv[i].numbered;
 482                                         curr_label_.erase();
 483                                         parse_into(p->cell(0), FLAG_END);
 484                                         p->numbered(0, curr_num_);
 485                                         p->label(0, curr_label_);
 486                                         break;
 487                                 }
 488
 489                                 case LM_OT_EQNARRAY: {
 490                                         parse_lines(p, 3, latex_mathenv[i].numbered, true);
 491                                         break;
 492                                 }
 493
 494                                 case LM_OT_ALIGN: {
 495                                         p->halign(lexArg('{'));
 496                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 497                                         break;
 498                                 }
 499
 500                                 case LM_OT_ALIGNAT: {
 501                                         p->halign(lexArg('{'));
 502                                         parse_lines(p, 2, latex_mathenv[i].numbered, true);
 503                                         break;
 504                                 }
 505
 506                                 default:
 507                                         lyxerr[Debug::MATHED]
 508                                                 << "1: unknown math environment: " << typ << "\n";
 509                         }
 510
 511                         break;
 512                 }
 513
 514                 default:
 515                         lyxerr[Debug::MATHED]
 516                                 << "2 unknown math environment: " << t << "\n";
 517         }
 518
 519         return p;
 520 }
 521
 522
 523 latexkeys const * Parser::read_delim()
 524 {
 525         int ld = yylex();
 526         //lyxerr << "found symbol: " << ld << "\n";
 527         latexkeys const * l = in_word_set(".");
 528         switch (ld) {
 529                 case LM_TK_SYM:
 530                 case LM_TK_NOGLYPH:
 531                 case LM_TK_SPECIAL:
 532                 case LM_TK_BEGIN: {
 533                         l = lval_;
 534                         //lyxerr << "found key 1: '" << l << "'\n";
 535                         //lyxerr << "found key 1: '" << l->name << "'\n";
 536                         break;
 537                 }
 538                 case ']':
 539                 case '[': {
 540                         string s;
 541                         s += ld;
 542                         l = in_word_set(s);
 543                         //lyxerr << "found key 2: '" << l->name << "'\n";
 544                         break;
 545                 }
 546                 case LM_TK_STR: {
 547                         string s;
 548                         s += ival_;
 549                         l = in_word_set(s);
 550                         //lyxerr << "found key 2: '" << l->name << "'\n";
 551                 }
 552         }
 553         return l;
 554 }
 555
 556
 557 void Parser::parse_into(MathArray & array, unsigned flags)
 558 {
 559         MathTextCodes yyvarcode   = LM_TC_VAR;
 560
 561         int  t      = yylex();
 562         bool panic  = false;
 563         int  brace  = 0;
 564         int  limits = 0;
 565
 566         while (t) {
 567                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << ival_
 568                 //      << " '" << sval_ << "'\n";
 569                 //array.dump(lyxerr);
 570                 //lyxerr << "\n";
 571
 572                 if (flags & FLAG_ITEM) {
 573                         flags &= ~FLAG_ITEM;
 574                         if (t == LM_TK_OPEN) {
 575                                 // skip the brace and regard everything to the next matching
 576                                 // closing brace
 577                                 t = yylex();
 578                                 ++brace;
 579                                 flags |= FLAG_BRACE_LAST;
 580                         } else {
 581                                 // regard only this single token
 582                                 flags |= FLAG_LEAVE;
 583                         }
 584                 }
 585
 586                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 587                         error(
 588                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 589                         panic = true;
 590                         break;
 591                 }
 592
 593                 switch (t) {
 594
 595                 case LM_TK_ALPHA:
 596                         if (!isspace(ival_) || yyvarcode == LM_TC_TEXTRM)
 597                                 array.push_back(new MathCharInset(ival_, yyvarcode));
 598                         break;
 599
 600                 case LM_TK_ARGUMENT: {
 601                         MathMacroArgument * p = new MathMacroArgument(ival_);
 602                         //p->code(yyvarcode);
 603                         array.push_back(p);
 604                         break;
 605                 }
 606
 607                 case LM_TK_SPECIAL:
 608                         array.push_back(new MathCharInset(ival_, LM_TC_SPECIAL));
 609                         break;
 610
 611                 case LM_TK_STR:
 612                         array.push_back(new MathCharInset(ival_, LM_TC_CONST));
 613                         break;
 614
 615                 case LM_TK_OPEN:
 616                         ++brace;
 617                         if (flags & FLAG_BRACE)
 618                                 flags &= ~FLAG_BRACE;
 619                         else
 620                                 array.push_back(new MathCharInset('{', LM_TC_TEX));
 621                         break;
 622
 623                 case LM_TK_CLOSE:
 624                         --brace;
 625                         if (brace < 0) {
 626                                 error("Unmatching braces");
 627                                 panic = true;
 628                                 break;
 629                         }
 630                         if (flags & FLAG_BRACE_FONT) {
 631                                 yyvarcode = LM_TC_VAR;
 632                                 flags &= ~FLAG_BRACE_FONT;
 633                                 break;
 634                         }
 635                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 636                                 flags |= FLAG_LEAVE;
 637                         else
 638                                 array.push_back(new MathCharInset('}', LM_TC_TEX));
 639                         break;
 640
 641                 case '[':
 642                         array.push_back(new MathCharInset('[', LM_TC_CONST));
 643                         break;
 644
 645                 case ']':
 646                         if (flags & FLAG_BRACK_END)
 647                                 flags |= FLAG_LEAVE;
 648                         else
 649                                 array.push_back(new MathCharInset(']', LM_TC_CONST));
 650                         break;
 651
 652                 case '^':
 653                         parse_into(
 654                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 655                         break;
 656
 657                 case '_':
 658                         parse_into(
 659                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 660                         break;
 661
 662                 case LM_TK_LIMIT:
 663                         limits = lval_->id;
 664                         //lyxerr << "setting limit to " << limits << "\n";
 665                         break;
 666
 667                 case '&':
 668                         if (flags & FLAG_AMPERSAND) {
 669                                 flags &= ~FLAG_AMPERSAND;
 670                                 return;
 671                         }
 672                         lyxerr[Debug::MATHED]
 673                                 << "found tab unexpectedly, array: '" << array << "'\n";
 674                         break;
 675
 676                 case LM_TK_NEWLINE:
 677                 {
 678                         curr_skip_ = lexArg('[');
 679                         if (flags & FLAG_NEWLINE) {
 680                                 flags &= ~FLAG_NEWLINE;
 681                                 return;
 682                         }
 683                         lyxerr[Debug::MATHED]
 684                                 << "found newline unexpectedly, array: '" << array << "'\n";
 685                         break;
 686                 }
 687
 688                 case LM_TK_PROTECT:
 689                         break;
 690
 691                 case LM_TK_NOGLYPH:
 692                 case LM_TK_NOGLYPHB:
 693                         limits = 0;
 694                         array.push_back(new MathNoglyphInset(lval_));
 695                         break;
 696
 697                 case LM_TK_BIGSYM:
 698                         limits = 0;
 699                         array.push_back(new MathBigopInset(lval_));
 700                         break;
 701
 702                 case LM_TK_FUNCLIM:
 703                         limits = 0;
 704                         array.push_back(new MathFuncLimInset(lval_));
 705                         break;
 706
 707                 case LM_TK_SYM:
 708                         limits = 0;
 709                         array.push_back(new MathSymbolInset(lval_));
 710                         break;
 711
 712                 case LM_TK_BOP:
 713                         array.push_back(new MathCharInset(ival_, LM_TC_BOP));
 714                         break;
 715
 716                 case LM_TK_SPACE:
 717                         if (ival_ >= 0)
 718                                 array.push_back(new MathSpaceInset(ival_));
 719                         break;
 720
 721                 case LM_TK_DOTS:
 722                         array.push_back(new MathDotsInset(lval_));
 723                         break;
 724
 725                 case LM_TK_STACK:
 726                 {
 727                         MathStackrelInset * p = new MathStackrelInset;
 728                         parse_into(p->cell(0), FLAG_ITEM);
 729                         parse_into(p->cell(1), FLAG_ITEM);
 730                         array.push_back(p);
 731                         break;
 732                 }
 733
 734                 case LM_TK_FRAC:
 735                 {
 736                         MathFracInset * p = new MathFracInset;
 737                         parse_into(p->cell(0), FLAG_ITEM);
 738                         parse_into(p->cell(1), FLAG_ITEM);
 739                         array.push_back(p);
 740                         break;
 741                 }
 742
 743                 case LM_TK_SQRT:
 744                 {
 745                         unsigned char c = getuchar();
 746                         if (c == '[') {
 747                                 array.push_back(new MathRootInset);
 748                                 parse_into(array.back()->cell(0), FLAG_BRACK_END);
 749                                 parse_into(array.back()->cell(1), FLAG_ITEM);
 750                         } else {
 751                                 is_.putback(c);
 752                                 array.push_back(new MathSqrtInset);
 753                                 parse_into(array.back()->cell(0), FLAG_ITEM);
 754                         }
 755                         break;
 756                 }
 757
 758                 case LM_TK_LEFT:
 759                 {
 760                         latexkeys const * l = read_delim();
 761                         MathArray ar;
 762                         parse_into(ar, FLAG_RIGHT);
 763                         latexkeys const * r = read_delim();
 764                         MathDelimInset * dl = new MathDelimInset(l, r);
 765                         dl->cell(0) = ar;
 766                         array.push_back(dl);
 767                         break;
 768                 }
 769
 770                 case LM_TK_RIGHT:
 771                         if (flags & FLAG_RIGHT)
 772                                 return;
 773                         error("Unmatched right delimiter");
 774 //        panic = true;
 775                         break;
 776
 777                 case LM_TK_FONT:
 778                         yyvarcode = static_cast<MathTextCodes>(lval_->id);
 779                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 780                         break;
 781
 782                 case LM_TK_STY:
 783                 {
 784                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 785                         //MathArray tmp = array;
 786                         //MathSizeInset * p = new MathSizeInset(MathStyles(lval_->id));
 787                         //array.push_back(p);
 788                         //parse_into(p->cell(0), FLAG_BRACE_FONT);
 789                         break;
 790                 }
 791
 792                 case LM_TK_DECORATION:
 793                 {
 794                         MathDecorationInset * p = new MathDecorationInset(lval_);
 795                         parse_into(p->cell(0), FLAG_ITEM);
 796                         array.push_back(p);
 797                         break;
 798                 }
 799
 800                 case LM_TK_NONUM:
 801                         curr_num_ = false;
 802                         break;
 803
 804                 case LM_TK_FUNC:
 805                         array.push_back(new MathSymbolInset(lval_));
 806                         break;
 807
 808                 case LM_TK_UNDEF:
 809                         if (MathMacroTable::hasTemplate(sval_)) {
 810                                 MathMacro * m = MathMacroTable::cloneTemplate(sval_);
 811                                 for (int i = 0; i < m->nargs(); ++i)
 812                                         parse_into(m->cell(i), FLAG_ITEM);
 813                                 array.push_back(m);
 814                                 m->metrics(LM_ST_TEXT);
 815                         } else
 816                                 array.push_back(new MathFuncInset(sval_));
 817                         break;
 818
 819                 case LM_TK_MATH:
 820                 case LM_TK_END:
 821                         return;
 822
 823                 case LM_TK_BEGIN:
 824                 {
 825                         int i = ival_;
 826                         MathInsetTypes typ = latex_mathenv[i].typ;
 827
 828                         if (typ == LM_OT_MATRIX) {
 829                                 string const valign = lexArg('[') + 'c';
 830                                 string const halign = lexArg('{');
 831                                 //lyxerr << "valign: '" << valign << "'\n";
 832                                 //lyxerr << "halign: '" << halign << "'\n";
 833                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 834                                 m->valign(valign[0]);
 835                                 m->halign(halign);
 836
 837                                 parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 838                                 array.push_back(m);
 839                                 //lyxerr << "read matrix " << *m << "\n";
 840                                 break;
 841                         } else
 842                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 843                         break;
 844                 }
 845
 846                 case LM_TK_MACRO:
 847                         array.push_back(MathMacroTable::cloneTemplate(lval_->name));
 848                         break;
 849
 850                 case LM_TK_LABEL:
 851                         curr_label_ = lexArg('{', true);
 852                         break;
 853
 854                 default:
 855                         error("Unrecognized token");
 856                         lyxerr[Debug::MATHED] << "[" << t << " " << sval_ << "]" << endl;
 857                         break;
 858
 859                 } // end of big switch
 860
 861                 if (flags & FLAG_LEAVE) {
 862                         flags &= ~FLAG_LEAVE;
 863                         break;
 864                 }
 865
 866                 if (panic) {
 867                         lyxerr << " Math Panic, expect problems!" << endl;
 868                         //   Search for the end command.
 869                         do {
 870                                 t = yylex();
 871                         } while (is_.good() && t != LM_TK_END && t);
 872                 } else {
 873                         t = yylex();
 874                 }
 875         }
 876 }
 877
 878
 879 void parse_end(LyXLex & lex, int lineno)
 880 {
 881         // Update line number
 882         lex.setLineNo(lineno);
 883
 884         // reading of end_inset
 885         while (lex.isOK()) {
 886                 lex.nextToken();
 887                 if (lex.getString() == "\\end_inset")
 888                         break;
 889                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 890                         " or missing \\end_inset!" << endl;
 891         }
 892 }
 893
 894 } // anonymous namespace
 895
 896
 897
 898 MathArray mathed_parse_cell(string const & str)
 899 {
 900         istringstream is(str.c_str());
 901         Parser parser(is);
 902         MathArray ar;
 903         parser.parse_into(ar, 0);
 904         return ar;
 905 }
 906
 907
 908
 909 MathMacroTemplate * mathed_parse_macro(string const & str)
 910 {
 911         istringstream is(str.c_str());
 912         Parser parser(is);
 913         return parser.parse_macro();
 914 }
 915
 916 MathMacroTemplate * mathed_parse_macro(istream & is)
 917 {
 918         Parser parser(is);
 919         return parser.parse_macro();
 920 }
 921
 922 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 923 {
 924         Parser parser(lex);
 925         MathMacroTemplate * p = parser.parse_macro();
 926         parse_end(lex, parser.lineno());
 927         return p;
 928 }
 929
 930
 931
 932 MathMatrixInset * mathed_parse_normal(string const & str)
 933 {
 934         istringstream is(str.c_str());
 935         Parser parser(is);
 936         return parser.parse_normal();
 937 }
 938
 939 MathMatrixInset * mathed_parse_normal(istream & is)
 940 {
 941         Parser parser(is);
 942         return parser.parse_normal();
 943 }
 944
 945 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 946 {
 947         Parser parser(lex);
 948         MathMatrixInset * p = parser.parse_normal();
 949         parse_end(lex, parser.lineno());
 950         return p;
 951 }
 952