src/mathed/MathParser.C

   1 /**
   2  * \file MathParser.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 /*
  12
  13 If someone desperately needs partial "structures" (such as a few
  14 cells of an array inset or similar) (s)he could uses the
  15 following hack as starting point to write some macros:
  16
  17   \newif\ifcomment
  18   \commentfalse
  19   \ifcomment
  20           \def\makeamptab{\catcode`\&=4\relax}
  21           \def\makeampletter{\catcode`\&=11\relax}
  22     \def\b{\makeampletter\expandafter\makeamptab\bi}
  23     \long\def\bi#1\e{}
  24   \else
  25     \def\b{}\def\e{}
  26   \fi
  27
  28   ...
  29
  30   \[\begin{array}{ccc}
  31 1
  32 &
  33
  34   \end{array}\]
  35
  36 */
  37
  38
  39 #include <config.h>
  40
  41 #include "MathParser.h"
  42
  43 #include "InsetMathArray.h"
  44 #include "InsetMathBig.h"
  45 #include "InsetMathBrace.h"
  46 #include "InsetMathChar.h"
  47 #include "InsetMathColor.h"
  48 #include "InsetMathComment.h"
  49 #include "InsetMathDelim.h"
  50 #include "InsetMathEnv.h"
  51 #include "InsetMathKern.h"
  52 #include "InsetMathMacro.h"
  53 #include "InsetMathPar.h"
  54 #include "InsetMathRef.h"
  55 #include "InsetMathRoot.h"
  56 #include "InsetMathScript.h"
  57 #include "InsetMathSplit.h"
  58 #include "InsetMathSqrt.h"
  59 #include "InsetMathTabular.h"
  60 #include "MathMacroTemplate.h"
  61 #include "MathFactory.h"
  62 #include "MathMacroArgument.h"
  63 #include "MathSupport.h"
  64
  65 #include "lyxlex.h"
  66 #include "debug.h"
  67
  68 #include "support/convert.h"
  69
  70 #include <sstream>
  71
  72
  73 namespace lyx {
  74
  75 using std::endl;
  76 using std::fill;
  77
  78 using std::string;
  79 using std::ios;
  80 using std::istream;
  81 using std::istringstream;
  82 using std::ostream;
  83 using std::vector;
  84
  85
  86 //#define FILEDEBUG
  87
  88
  89 namespace {
  90
  91 InsetMath::mode_type asMode(InsetMath::mode_type oldmode, docstring const & str)
  92 {
  93         //lyxerr << "handling mode: '" << str << "'" << endl;
  94         if (str == "mathmode")
  95                 return InsetMath::MATH_MODE;
  96         if (str == "textmode" || str == "forcetext")
  97                 return InsetMath::TEXT_MODE;
  98         return oldmode;
  99 }
 100
 101
 102 bool stared(docstring const & s)
 103 {
 104         size_t const n = s.size();
 105         return n && s[n - 1] == '*';
 106 }
 107
 108
 109 /*!
 110  * Add the row \p cellrow to \p grid.
 111  * \returns wether the row could be added. Adding a row can fail for
 112  * environments like "equation" that have a fixed number of rows.
 113  */
 114 bool addRow(InsetMathGrid & grid, InsetMathGrid::row_type & cellrow,
 115             docstring const & vskip)
 116 {
 117         ++cellrow;
 118         if (cellrow == grid.nrows()) {
 119                 //lyxerr << "adding row " << cellrow << endl;
 120                 grid.addRow(cellrow - 1);
 121                 if (cellrow == grid.nrows()) {
 122                         // We can't add a row to this grid, so let's
 123                         // append the content of this cell to the previous
 124                         // one.
 125                         // This does not happen in well formed .lyx files,
 126                         // but LyX versions 1.3.x and older could create
 127                         // such files and tex2lyx can still do that.
 128                         --cellrow;
 129                         lyxerr << "ignoring extra row";
 130                         if (!vskip.empty())
 131                                 lyxerr << " with extra space " << to_utf8(vskip);
 132                         lyxerr << '.' << endl;
 133                         return false;
 134                 }
 135         }
 136         grid.vcrskip(LyXLength(to_utf8(vskip)), cellrow - 1);
 137         return true;
 138 }
 139
 140
 141 /*!
 142  * Add the column \p cellcol to \p grid.
 143  * \returns wether the column could be added. Adding a column can fail for
 144  * environments like "eqnarray" that have a fixed number of columns.
 145  */
 146 bool addCol(InsetMathGrid & grid, InsetMathGrid::col_type & cellcol)
 147 {
 148         ++cellcol;
 149         if (cellcol == grid.ncols()) {
 150                 //lyxerr << "adding column " << cellcol << endl;
 151                 grid.addCol(cellcol - 1);
 152                 if (cellcol == grid.ncols()) {
 153                         // We can't add a column to this grid, so let's
 154                         // append the content of this cell to the previous
 155                         // one.
 156                         // This does not happen in well formed .lyx files,
 157                         // but LyX versions 1.3.x and older could create
 158                         // such files and tex2lyx can still do that.
 159                         --cellcol;
 160                         lyxerr << "ignoring extra column." << endl;
 161                         return false;
 162                 }
 163         }
 164         return true;
 165 }
 166
 167
 168 /*!
 169  * Check wether the last row is empty and remove it if yes.
 170  * Otherwise the following code
 171  * \verbatim
 172 \begin{array}{|c|c|}
 173 \hline
 174 1 & 2 \\ \hline
 175 3 & 4 \\ \hline
 176 \end{array}
 177  * \endverbatim
 178  * will result in a grid with 3 rows (+ the dummy row that is always present),
 179  * because the last '\\' opens a new row.
 180  */
 181 void delEmptyLastRow(InsetMathGrid & grid)
 182 {
 183         InsetMathGrid::row_type const row = grid.nrows() - 1;
 184         for (InsetMathGrid::col_type col = 0; col < grid.ncols(); ++col) {
 185                 if (!grid.cell(grid.index(row, col)).empty())
 186                         return;
 187         }
 188         // Copy the row information of the empty row (which would contain the
 189         // last hline in the example above) to the dummy row and delete the
 190         // empty row.
 191         grid.rowinfo(row + 1) = grid.rowinfo(row);
 192         grid.delRow(row);
 193 }
 194
 195
 196 // These are TeX's catcodes
 197 enum CatCode {
 198         catEscape,     // 0    backslash
 199         catBegin,      // 1    {
 200         catEnd,        // 2    }
 201         catMath,       // 3    $
 202         catAlign,      // 4    &
 203         catNewline,    // 5    ^^M
 204         catParameter,  // 6    #
 205         catSuper,      // 7    ^
 206         catSub,        // 8    _
 207         catIgnore,     // 9
 208         catSpace,      // 10   space
 209         catLetter,     // 11   a-zA-Z
 210         catOther,      // 12   none of the above
 211         catActive,     // 13   ~
 212         catComment,    // 14   %
 213         catInvalid     // 15   <delete>
 214 };
 215
 216 CatCode theCatcode[256];
 217
 218
 219 inline CatCode catcode(unsigned char c)
 220 {
 221         return theCatcode[c];
 222 }
 223
 224
 225 enum {
 226         FLAG_ALIGN      = 1 << 0,  //  next & or \\ ends the parsing process
 227         FLAG_BRACE_LAST = 1 << 1,  //  next closing brace ends the parsing
 228         FLAG_RIGHT      = 1 << 2,  //  next \\right ends the parsing process
 229         FLAG_END        = 1 << 3,  //  next \\end ends the parsing process
 230         FLAG_BRACK_LAST = 1 << 4,  //  next closing bracket ends the parsing
 231         FLAG_TEXTMODE   = 1 << 5,  //  we are in a box
 232         FLAG_ITEM       = 1 << 6,  //  read a (possibly braced token)
 233         FLAG_LEAVE      = 1 << 7,  //  leave the loop at the end
 234         FLAG_SIMPLE     = 1 << 8,  //  next $ leaves the loop
 235         FLAG_EQUATION   = 1 << 9,  //  next \] leaves the loop
 236         FLAG_SIMPLE2    = 1 << 10, //  next \) leaves the loop
 237         FLAG_OPTION     = 1 << 11, //  read [...] style option
 238         FLAG_BRACED     = 1 << 12  //  read {...} style argument
 239 };
 240
 241
 242 //
 243 // Helper class for parsing
 244 //
 245
 246 class Token {
 247 public:
 248         ///
 249         Token() : cs_(), char_(0), cat_(catIgnore) {}
 250         ///
 251         Token(char_type c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
 252         ///
 253         Token(docstring const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
 254
 255         ///
 256         docstring const & cs() const { return cs_; }
 257         ///
 258         CatCode cat() const { return cat_; }
 259         ///
 260         char_type character() const { return char_; }
 261         ///
 262         docstring asString() const { return cs_.size() ? cs_ : docstring(1, char_); }
 263         ///
 264         docstring asInput() const { return cs_.size() ? '\\' + cs_ : docstring(1, char_); }
 265
 266 private:
 267         ///
 268         docstring cs_;
 269         ///
 270         char_type char_;
 271         ///
 272         CatCode cat_;
 273 };
 274
 275 ostream & operator<<(ostream & os, Token const & t)
 276 {
 277         if (t.cs().size())
 278                 os << '\\' << t.cs();
 279         else if (t.cat() == catLetter)
 280                 os << t.character();
 281         else
 282                 os << '[' << t.character() << ',' << t.cat() << ']';
 283         return os;
 284 }
 285
 286
 287 class Parser {
 288 public:
 289         ///
 290         typedef  InsetMath::mode_type mode_type;
 291
 292         ///
 293         Parser(LyXLex & lex);
 294         ///
 295         Parser(istream & is);
 296
 297         ///
 298         bool parse(MathAtom & at);
 299         ///
 300         void parse(MathArray & array, unsigned flags, mode_type mode);
 301         ///
 302         void parse1(InsetMathGrid & grid, unsigned flags, mode_type mode,
 303                 bool numbered);
 304         ///
 305         MathArray parse(unsigned flags, mode_type mode);
 306         ///
 307         int lineno() const { return lineno_; }
 308         ///
 309         void putback();
 310
 311 private:
 312         ///
 313         void parse2(MathAtom & at, unsigned flags, mode_type mode, bool numbered);
 314         /// get arg delimited by 'left' and 'right'
 315         docstring getArg(char_type left, char_type right);
 316         ///
 317         char_type getChar();
 318         ///
 319         void error(string const & msg);
 320         void error(docstring const & msg) { error(to_utf8(msg)); }
 321         /// dump contents to screen
 322         void dump() const;
 323         ///
 324         void tokenize(istream & is);
 325         ///
 326         void tokenize(docstring const & s);
 327         ///
 328         void skipSpaceTokens(idocstream & is, char_type c);
 329         ///
 330         void push_back(Token const & t);
 331         ///
 332         void pop_back();
 333         ///
 334         Token const & prevToken() const;
 335         ///
 336         Token const & nextToken() const;
 337         ///
 338         Token const & getToken();
 339         /// skips spaces if any
 340         void skipSpaces();
 341         ///
 342         void lex(docstring const & s);
 343         ///
 344         bool good() const;
 345         ///
 346         docstring parse_verbatim_item();
 347         ///
 348         docstring parse_verbatim_option();
 349
 350         ///
 351         int lineno_;
 352         ///
 353         vector<Token> tokens_;
 354         ///
 355         unsigned pos_;
 356         /// Stack of active environments
 357         vector<docstring> environments_;
 358 };
 359
 360
 361 Parser::Parser(LyXLex & lexer)
 362         : lineno_(lexer.getLineNo()), pos_(0)
 363 {
 364         tokenize(lexer.getStream());
 365         lexer.eatLine();
 366 }
 367
 368
 369 Parser::Parser(istream & is)
 370         : lineno_(0), pos_(0)
 371 {
 372         tokenize(is);
 373 }
 374
 375
 376 void Parser::push_back(Token const & t)
 377 {
 378         tokens_.push_back(t);
 379 }
 380
 381
 382 void Parser::pop_back()
 383 {
 384         tokens_.pop_back();
 385 }
 386
 387
 388 Token const & Parser::prevToken() const
 389 {
 390         static const Token dummy;
 391         return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
 392 }
 393
 394
 395 Token const & Parser::nextToken() const
 396 {
 397         static const Token dummy;
 398         return good() ? tokens_[pos_] : dummy;
 399 }
 400
 401
 402 Token const & Parser::getToken()
 403 {
 404         static const Token dummy;
 405         //lyxerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << endl;
 406         return good() ? tokens_[pos_++] : dummy;
 407 }
 408
 409
 410 void Parser::skipSpaces()
 411 {
 412         while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
 413                 getToken();
 414 }
 415
 416
 417 void Parser::putback()
 418 {
 419         --pos_;
 420 }
 421
 422
 423 bool Parser::good() const
 424 {
 425         return pos_ < tokens_.size();
 426 }
 427
 428
 429 char_type Parser::getChar()
 430 {
 431         if (!good())
 432                 error("The input stream is not well...");
 433         return tokens_[pos_++].character();
 434 }
 435
 436
 437 docstring Parser::getArg(char_type left, char_type right)
 438 {
 439         skipSpaces();
 440
 441         docstring result;
 442         char_type c = getChar();
 443
 444         if (c != left)
 445                 putback();
 446         else
 447                 while ((c = getChar()) != right && good())
 448                         result += c;
 449
 450         return result;
 451 }
 452
 453
 454 void Parser::skipSpaceTokens(idocstream & is, char_type c)
 455 {
 456         // skip trailing spaces
 457         while (catcode(c) == catSpace || catcode(c) == catNewline)
 458                 if (!is.get(c))
 459                         break;
 460         //lyxerr << "putting back: " << c << endl;
 461         is.putback(c);
 462 }
 463
 464
 465 void Parser::tokenize(istream & is)
 466 {
 467         // eat everything up to the next \end_inset or end of stream
 468         // and store it in s for further tokenization
 469         std::string s;
 470         char c;
 471         while (is.get(c)) {
 472                 s += c;
 473                 if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
 474                         s = s.substr(0, s.size() - 10);
 475                         break;
 476                 }
 477         }
 478         // Remove the space after \end_inset
 479         if (is.get(c) && c != ' ')
 480                 is.unget();
 481
 482         // tokenize buffer
 483         tokenize(from_utf8(s));
 484 }
 485
 486
 487 void Parser::tokenize(docstring const & buffer)
 488 {
 489         idocstringstream is(buffer, ios::in | ios::binary);
 490
 491         char_type c;
 492         while (is.get(c)) {
 493                 //lyxerr << "reading c: " << c << endl;
 494
 495                 switch (catcode(c)) {
 496                         case catNewline: {
 497                                 ++lineno_;
 498                                 is.get(c);
 499                                 if (catcode(c) == catNewline)
 500                                         ; //push_back(Token("par"));
 501                                 else {
 502                                         push_back(Token('\n', catNewline));
 503                                         is.putback(c);
 504                                 }
 505                                 break;
 506                         }
 507
 508 /*
 509                         case catComment: {
 510                                 while (is.get(c) && catcode(c) != catNewline)
 511                                         ;
 512                                 ++lineno_;
 513                                 break;
 514                         }
 515 */
 516
 517                         case catEscape: {
 518                                 is.get(c);
 519                                 if (!is) {
 520                                         error("unexpected end of input");
 521                                 } else {
 522                                         docstring s(1, c);
 523                                         if (catcode(c) == catLetter) {
 524                                                 // collect letters
 525                                                 while (is.get(c) && catcode(c) == catLetter)
 526                                                         s += c;
 527                                                 skipSpaceTokens(is, c);
 528                                         }
 529                                         push_back(Token(s));
 530                                 }
 531                                 break;
 532                         }
 533
 534                         case catSuper:
 535                         case catSub: {
 536                                 push_back(Token(c, catcode(c)));
 537                                 is.get(c);
 538                                 skipSpaceTokens(is, c);
 539                                 break;
 540                         }
 541
 542                         case catIgnore: {
 543                                 lyxerr << "ignoring a char: " << int(c) << endl;
 544                                 break;
 545                         }
 546
 547                         default:
 548                                 push_back(Token(c, catcode(c)));
 549                 }
 550         }
 551
 552 #ifdef FILEDEBUG
 553         dump();
 554 #endif
 555 }
 556
 557
 558 void Parser::dump() const
 559 {
 560         lyxerr << "\nTokens: ";
 561         for (unsigned i = 0; i < tokens_.size(); ++i) {
 562                 if (i == pos_)
 563                         lyxerr << " <#> ";
 564                 lyxerr << tokens_[i];
 565         }
 566         lyxerr << " pos: " << pos_ << endl;
 567 }
 568
 569
 570 void Parser::error(string const & msg)
 571 {
 572         lyxerr << "Line ~" << lineno_ << ": Math parse error: " << msg << endl;
 573         dump();
 574         //exit(1);
 575 }
 576
 577
 578 bool Parser::parse(MathAtom & at)
 579 {
 580         skipSpaces();
 581         MathArray ar;
 582         parse(ar, false, InsetMath::UNDECIDED_MODE);
 583         if (ar.size() != 1 || ar.front()->getType() == hullNone) {
 584                 lyxerr << "unusual contents found: " << ar << endl;
 585                 at = MathAtom(new InsetMathPar(ar));
 586                 //if (at->nargs() > 0)
 587                 //      at.nucleus()->cell(0) = ar;
 588                 //else
 589                 //      lyxerr << "unusual contents found: " << ar << endl;
 590                 return true;
 591         }
 592         at = ar[0];
 593         return true;
 594 }
 595
 596
 597 docstring Parser::parse_verbatim_option()
 598 {
 599         skipSpaces();
 600         docstring res;
 601         if (nextToken().character() == '[') {
 602                 Token t = getToken();
 603                 for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
 604                         if (t.cat() == catBegin) {
 605                                 putback();
 606                                 res += '{' + parse_verbatim_item() + '}';
 607                         } else
 608                                 res += t.asString();
 609                 }
 610         }
 611         return res;
 612 }
 613
 614
 615 docstring Parser::parse_verbatim_item()
 616 {
 617         skipSpaces();
 618         docstring res;
 619         if (nextToken().cat() == catBegin) {
 620                 Token t = getToken();
 621                 for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
 622                         if (t.cat() == catBegin) {
 623                                 putback();
 624                                 res += '{' + parse_verbatim_item() + '}';
 625                         }
 626                         else
 627                                 res += t.asString();
 628                 }
 629         }
 630         return res;
 631 }
 632
 633
 634 MathArray Parser::parse(unsigned flags, mode_type mode)
 635 {
 636         MathArray ar;
 637         parse(ar, flags, mode);
 638         return ar;
 639 }
 640
 641
 642 void Parser::parse(MathArray & array, unsigned flags, mode_type mode)
 643 {
 644         InsetMathGrid grid(1, 1);
 645         parse1(grid, flags, mode, false);
 646         array = grid.cell(0);
 647 }
 648
 649
 650 void Parser::parse2(MathAtom & at, const unsigned flags, const mode_type mode,
 651         const bool numbered)
 652 {
 653         parse1(*(at.nucleus()->asGridInset()), flags, mode, numbered);
 654 }
 655
 656
 657 void Parser::parse1(InsetMathGrid & grid, unsigned flags,
 658         const mode_type mode, const bool numbered)
 659 {
 660         int limits = 0;
 661         InsetMathGrid::row_type cellrow = 0;
 662         InsetMathGrid::col_type cellcol = 0;
 663         MathArray * cell = &grid.cell(grid.index(cellrow, cellcol));
 664
 665         if (grid.asHullInset())
 666                 grid.asHullInset()->numbered(cellrow, numbered);
 667
 668         //dump();
 669         //lyxerr << " flags: " << flags << endl;
 670         //lyxerr << " mode: " << mode  << endl;
 671         //lyxerr << "grid: " << grid << endl;
 672
 673         while (good()) {
 674                 Token const & t = getToken();
 675
 676 #ifdef FILEDEBUG
 677                 lyxerr << "t: " << t << " flags: " << flags << endl;
 678                 lyxerr << "mode: " << mode  << endl;
 679                 cell->dump();
 680                 lyxerr << endl;
 681 #endif
 682
 683                 if (flags & FLAG_ITEM) {
 684
 685                         if (t.cat() == catBegin) {
 686                                 // skip the brace and collect everything to the next matching
 687                                 // closing brace
 688                                 parse1(grid, FLAG_BRACE_LAST, mode, numbered);
 689                                 return;
 690                         }
 691
 692                         // handle only this single token, leave the loop if done
 693                         flags = FLAG_LEAVE;
 694                 }
 695
 696
 697                 if (flags & FLAG_BRACED) {
 698                         if (t.cat() == catSpace)
 699                                 continue;
 700
 701                         if (t.cat() != catBegin) {
 702                                 error("opening brace expected");
 703                                 return;
 704                         }
 705
 706                         // skip the brace and collect everything to the next matching
 707                         // closing brace
 708                         flags = FLAG_BRACE_LAST;
 709                 }
 710
 711
 712                 if (flags & FLAG_OPTION) {
 713                         if (t.cat() == catOther && t.character() == '[') {
 714                                 MathArray ar;
 715                                 parse(ar, FLAG_BRACK_LAST, mode);
 716                                 cell->append(ar);
 717                         } else {
 718                                 // no option found, put back token and we are done
 719                                 putback();
 720                         }
 721                         return;
 722                 }
 723
 724                 //
 725                 // cat codes
 726                 //
 727                 if (t.cat() == catMath) {
 728                         if (mode != InsetMath::MATH_MODE) {
 729                                 // we are inside some text mode thingy, so opening new math is allowed
 730                                 Token const & n = getToken();
 731                                 if (n.cat() == catMath) {
 732                                         // TeX's $$...$$ syntax for displayed math
 733                                         cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
 734                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 735                                         getToken(); // skip the second '$' token
 736                                 } else {
 737                                         // simple $...$  stuff
 738                                         putback();
 739                                         cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
 740                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 741                                 }
 742                         }
 743
 744                         else if (flags & FLAG_SIMPLE) {
 745                                 // this is the end of the formula
 746                                 return;
 747                         }
 748
 749                         else {
 750                                 error("something strange in the parser");
 751                                 break;
 752                         }
 753                 }
 754
 755                 else if (t.cat() == catLetter)
 756                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 757
 758                 else if (t.cat() == catSpace && mode != InsetMath::MATH_MODE) {
 759                         if (cell->empty() || cell->back()->getChar() != ' ')
 760                                 cell->push_back(MathAtom(new InsetMathChar(t.character())));
 761                 }
 762
 763                 else if (t.cat() == catNewline && mode != InsetMath::MATH_MODE) {
 764                         if (cell->empty() || cell->back()->getChar() != ' ')
 765                                 cell->push_back(MathAtom(new InsetMathChar(' ')));
 766                 }
 767
 768                 else if (t.cat() == catParameter) {
 769                         Token const & n = getToken();
 770                         cell->push_back(MathAtom(new MathMacroArgument(n.character()-'0')));
 771                 }
 772
 773                 else if (t.cat() == catActive)
 774                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 775
 776                 else if (t.cat() == catBegin) {
 777                         MathArray ar;
 778                         parse(ar, FLAG_BRACE_LAST, mode);
 779                         // do not create a BraceInset if they were written by LyX
 780                         // this helps to keep the annoyance of  "a choose b"  to a minimum
 781                         if (ar.size() == 1 && ar[0]->extraBraces())
 782                                 cell->append(ar);
 783                         else
 784                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
 785                 }
 786
 787                 else if (t.cat() == catEnd) {
 788                         if (flags & FLAG_BRACE_LAST)
 789                                 return;
 790                         error("found '}' unexpectedly");
 791                         //BOOST_ASSERT(false);
 792                         //add(cell, '}', LM_TC_TEX);
 793                 }
 794
 795                 else if (t.cat() == catAlign) {
 796                         //lyxerr << " column now " << (cellcol + 1)
 797                         //       << " max: " << grid.ncols() << endl;
 798                         if (flags & FLAG_ALIGN)
 799                                 return;
 800                         if (addCol(grid, cellcol))
 801                                 cell = &grid.cell(grid.index(cellrow, cellcol));
 802                 }
 803
 804                 else if (t.cat() == catSuper || t.cat() == catSub) {
 805                         bool up = (t.cat() == catSuper);
 806                         // we need no new script inset if the last thing was a scriptinset,
 807                         // which has that script already not the same script already
 808                         if (!cell->size())
 809                                 cell->push_back(MathAtom(new InsetMathScript(up)));
 810                         else if (cell->back()->asScriptInset() &&
 811                                         !cell->back()->asScriptInset()->has(up))
 812                                 cell->back().nucleus()->asScriptInset()->ensure(up);
 813                         else if (cell->back()->asScriptInset())
 814                                 cell->push_back(MathAtom(new InsetMathScript(up)));
 815                         else
 816                                 cell->back() = MathAtom(new InsetMathScript(cell->back(), up));
 817                         InsetMathScript * p = cell->back().nucleus()->asScriptInset();
 818                         // special handling of {}-bases
 819                         // is this always correct?
 820                         if (p->nuc().size() == 1
 821                             && p->nuc().back()->asBraceInset())
 822                                 p->nuc() = p->nuc().back()->asNestInset()->cell(0);
 823                         parse(p->cell(p->idxOfScript(up)), FLAG_ITEM, mode);
 824                         if (limits) {
 825                                 p->limits(limits);
 826                                 limits = 0;
 827                         }
 828                 }
 829
 830                 else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
 831                         //lyxerr << "finished reading option" << endl;
 832                         return;
 833                 }
 834
 835                 else if (t.cat() == catOther)
 836                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 837
 838                 else if (t.cat() == catComment) {
 839                         docstring s;
 840                         while (good()) {
 841                                 Token const & t = getToken();
 842                                 if (t.cat() == catNewline)
 843                                         break;
 844                                 s += t.asString();
 845                         }
 846                         cell->push_back(MathAtom(new InsetMathComment(s)));
 847                         skipSpaces();
 848                 }
 849
 850                 //
 851                 // control sequences
 852                 //
 853
 854                 else if (t.cs() == "lyxlock") {
 855                         if (cell->size())
 856                                 cell->back().nucleus()->lock(true);
 857                 }
 858
 859                 else if (t.cs() == "def" ||
 860                         t.cs() == "newcommand" ||
 861                         t.cs() == "renewcommand")
 862                 {
 863                         docstring const type = t.cs();
 864                         docstring name;
 865                         int nargs = 0;
 866                         if (t.cs() == "def") {
 867                                 // get name
 868                                 name = getToken().cs();
 869
 870                                 // read parameter
 871                                 docstring pars;
 872                                 while (good() && nextToken().cat() != catBegin) {
 873                                         pars += getToken().cs();
 874                                         ++nargs;
 875                                 }
 876                                 nargs /= 2;
 877                                 //lyxerr << "read \\def parameter list '" << pars << "'" << endl;
 878
 879                         } else { // t.cs() == "newcommand" || t.cs() == "renewcommand"
 880
 881                                 if (getToken().cat() != catBegin) {
 882                                         error("'{' in \\newcommand expected (1) ");
 883                                         return;
 884                                 }
 885
 886                                 name = getToken().cs();
 887
 888                                 if (getToken().cat() != catEnd) {
 889                                         error("'}' in \\newcommand expected");
 890                                         return;
 891                                 }
 892
 893                                 docstring const arg  = getArg('[', ']');
 894                                 if (!arg.empty())
 895                                         nargs = convert<int>(arg);
 896
 897                         }
 898
 899                         MathArray ar1;
 900                         parse(ar1, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
 901
 902                         // we cannot handle recursive stuff at all
 903                         //MathArray test;
 904                         //test.push_back(createInsetMath(name));
 905                         //if (ar1.contains(test)) {
 906                         //      error("we cannot handle recursive macros at all.");
 907                         //      return;
 908                         //}
 909
 910                         // is a version for display attached?
 911                         skipSpaces();
 912                         MathArray ar2;
 913                         if (nextToken().cat() == catBegin)
 914                                 parse(ar2, FLAG_ITEM, InsetMath::MATH_MODE);
 915
 916                         cell->push_back(MathAtom(new MathMacroTemplate(name, nargs, type,
 917                                 ar1, ar2)));
 918                 }
 919
 920                 else if (t.cs() == "(") {
 921                         cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
 922                         parse2(cell->back(), FLAG_SIMPLE2, InsetMath::MATH_MODE, false);
 923                 }
 924
 925                 else if (t.cs() == "[") {
 926                         cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
 927                         parse2(cell->back(), FLAG_EQUATION, InsetMath::MATH_MODE, false);
 928                 }
 929
 930                 else if (t.cs() == "protect")
 931                         // ignore \\protect, will hopefully be re-added during output
 932                         ;
 933
 934                 else if (t.cs() == "end") {
 935                         if (flags & FLAG_END) {
 936                                 // eat environment name
 937                                 docstring const name = getArg('{', '}');
 938                                 if (environments_.empty())
 939                                         error("'found \\end{" + name +
 940                                               "}' without matching '\\begin{" +
 941                                               name + "}'");
 942                                 else if (name != environments_.back())
 943                                         error("'\\end{" + name +
 944                                               "}' does not match '\\begin{" +
 945                                               environments_.back() + "}'");
 946                                 else {
 947                                         environments_.pop_back();
 948                                         // Delete empty last row in matrix
 949                                         // like insets.
 950                                         // If you abuse InsetMathGrid for
 951                                         // non-matrix like structures you
 952                                         // probably need to refine this test.
 953                                         // Right now we only have to test for
 954                                         // single line hull insets.
 955                                         if (grid.nrows() > 1)
 956                                                 delEmptyLastRow(grid);
 957                                         return;
 958                                 }
 959                         } else
 960                                 error("found 'end' unexpectedly");
 961                 }
 962
 963                 else if (t.cs() == ")") {
 964                         if (flags & FLAG_SIMPLE2)
 965                                 return;
 966                         error("found '\\)' unexpectedly");
 967                 }
 968
 969                 else if (t.cs() == "]") {
 970                         if (flags & FLAG_EQUATION)
 971                                 return;
 972                         error("found '\\]' unexpectedly");
 973                 }
 974
 975                 else if (t.cs() == "\\") {
 976                         if (flags & FLAG_ALIGN)
 977                                 return;
 978                         if (addRow(grid, cellrow, getArg('[', ']'))) {
 979                                 cellcol = 0;
 980                                 if (grid.asHullInset())
 981                                         grid.asHullInset()->numbered(
 982                                                         cellrow, numbered);
 983                                 cell = &grid.cell(grid.index(cellrow,
 984                                                              cellcol));
 985                         }
 986                 }
 987
 988 #if 0
 989                 else if (t.cs() == "multicolumn") {
 990                         // extract column count and insert dummy cells
 991                         MathArray count;
 992                         parse(count, FLAG_ITEM, mode);
 993                         int cols = 1;
 994                         if (!extractNumber(count, cols)) {
 995                                 lyxerr << " can't extract number of cells from " << count << endl;
 996                         }
 997                         // resize the table if necessary
 998                         for (int i = 0; i < cols; ++i) {
 999                                 if (addCol(grid, cellcol)) {
1000                                         cell = &grid.cell(grid.index(
1001                                                         cellrow, cellcol));
1002                                         // mark this as dummy
1003                                         grid.cellinfo(grid.index(
1004                                                 cellrow, cellcol)).dummy_ = true;
1005                                 }
1006                         }
1007                         // the last cell is the real thing, not a dummy
1008                         grid.cellinfo(grid.index(cellrow, cellcol)).dummy_ = false;
1009
1010                         // read special alignment
1011                         MathArray align;
1012                         parse(align, FLAG_ITEM, mode);
1013                         //grid.cellinfo(grid.index(cellrow, cellcol)).align_ = extractString(align);
1014
1015                         // parse the remaining contents into the "real" cell
1016                         parse(*cell, FLAG_ITEM, mode);
1017                 }
1018 #endif
1019
1020                 else if (t.cs() == "limits")
1021                         limits = 1;
1022
1023                 else if (t.cs() == "nolimits")
1024                         limits = -1;
1025
1026                 else if (t.cs() == "nonumber") {
1027                         if (grid.asHullInset())
1028                                 grid.asHullInset()->numbered(cellrow, false);
1029                 }
1030
1031                 else if (t.cs() == "number") {
1032                         if (grid.asHullInset())
1033                                 grid.asHullInset()->numbered(cellrow, true);
1034                 }
1035
1036                 else if (t.cs() == "hline") {
1037                         grid.rowinfo(cellrow).lines_ ++;
1038                 }
1039
1040                 else if (t.cs() == "sqrt") {
1041                         MathArray ar;
1042                         parse(ar, FLAG_OPTION, mode);
1043                         if (ar.size()) {
1044                                 cell->push_back(MathAtom(new InsetMathRoot));
1045                                 cell->back().nucleus()->cell(0) = ar;
1046                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1047                         } else {
1048                                 cell->push_back(MathAtom(new InsetMathSqrt));
1049                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1050                         }
1051                 }
1052
1053                 else if (t.cs() == "xrightarrow" || t.cs() == "xleftarrow") {
1054                         cell->push_back(createInsetMath(t.cs()));
1055                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1056                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1057                 }
1058
1059                 else if (t.cs() == "ref" || t.cs() == "prettyref" ||
1060                                 t.cs() == "pageref" || t.cs() == "vpageref" || t.cs() == "vref") {
1061                         cell->push_back(MathAtom(new RefInset(t.cs())));
1062                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1063                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1064                 }
1065
1066                 else if (t.cs() == "left") {
1067                         skipSpaces();
1068                         Token const & tl = getToken();
1069                         // \| and \Vert are equivalent, and InsetMathDelim
1070                         // can't handle \|
1071                         // FIXME: fix this in InsetMathDelim itself!
1072                         docstring const l = tl.cs() == "|" ? from_ascii("Vert") : tl.asString();
1073                         MathArray ar;
1074                         parse(ar, FLAG_RIGHT, mode);
1075                         skipSpaces();
1076                         Token const & tr = getToken();
1077                         docstring const r = tr.cs() == "|" ? from_ascii("Vert") : tr.asString();
1078                         cell->push_back(MathAtom(new InsetMathDelim(l, r, ar)));
1079                 }
1080
1081                 else if (t.cs() == "right") {
1082                         if (flags & FLAG_RIGHT)
1083                                 return;
1084                         //lyxerr << "got so far: '" << cell << "'" << endl;
1085                         error("Unmatched right delimiter");
1086                         return;
1087                 }
1088
1089                 else if (t.cs() == "begin") {
1090                         docstring const name = getArg('{', '}');
1091                         environments_.push_back(name);
1092
1093                         if (name == "array" || name == "subarray") {
1094                                 docstring const valign = parse_verbatim_option() + 'c';
1095                                 docstring const halign = parse_verbatim_item();
1096                                 cell->push_back(MathAtom(new InsetMathArray(name, (char)valign[0], halign)));
1097                                 parse2(cell->back(), FLAG_END, mode, false);
1098                         }
1099
1100                         else if (name == "tabular") {
1101                                 docstring const valign = parse_verbatim_option() + 'c';
1102                                 docstring const halign = parse_verbatim_item();
1103                                 cell->push_back(MathAtom(new InsetMathTabular(name, (char)valign[0], halign)));
1104                                 parse2(cell->back(), FLAG_END, InsetMath::TEXT_MODE, false);
1105                         }
1106
1107                         else if (name == "split" || name == "cases") {
1108                                 cell->push_back(createInsetMath(name));
1109                                 parse2(cell->back(), FLAG_END, mode, false);
1110                         }
1111
1112                         else if (name == "alignedat") {
1113                                 docstring const valign = parse_verbatim_option() + 'c';
1114                                 // ignore this for a while
1115                                 getArg('{', '}');
1116                                 cell->push_back(MathAtom(new InsetMathSplit(name, (char)valign[0])));
1117                                 parse2(cell->back(), FLAG_END, mode, false);
1118                         }
1119
1120                         else if (name == "math") {
1121                                 cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
1122                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, true);
1123                         }
1124
1125                         else if (name == "equation" || name == "equation*"
1126                                         || name == "displaymath") {
1127                                 cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
1128                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, (name == "equation"));
1129                         }
1130
1131                         else if (name == "eqnarray" || name == "eqnarray*") {
1132                                 cell->push_back(MathAtom(new InsetMathHull(hullEqnArray)));
1133                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1134                         }
1135
1136                         else if (name == "align" || name == "align*") {
1137                                 cell->push_back(MathAtom(new InsetMathHull(hullAlign)));
1138                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1139                         }
1140
1141                         else if (name == "flalign" || name == "flalign*") {
1142                                 cell->push_back(MathAtom(new InsetMathHull(hullFlAlign)));
1143                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1144                         }
1145
1146                         else if (name == "alignat" || name == "alignat*") {
1147                                 // ignore this for a while
1148                                 getArg('{', '}');
1149                                 cell->push_back(MathAtom(new InsetMathHull(hullAlignAt)));
1150                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1151                         }
1152
1153                         else if (name == "xalignat" || name == "xalignat*") {
1154                                 // ignore this for a while
1155                                 getArg('{', '}');
1156                                 cell->push_back(MathAtom(new InsetMathHull(hullXAlignAt)));
1157                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1158                         }
1159
1160                         else if (name == "xxalignat") {
1161                                 // ignore this for a while
1162                                 getArg('{', '}');
1163                                 cell->push_back(MathAtom(new InsetMathHull(hullXXAlignAt)));
1164                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1165                         }
1166
1167                         else if (name == "multline" || name == "multline*") {
1168                                 cell->push_back(MathAtom(new InsetMathHull(hullMultline)));
1169                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1170                         }
1171
1172                         else if (name == "gather" || name == "gather*") {
1173                                 cell->push_back(MathAtom(new InsetMathHull(hullGather)));
1174                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1175                         }
1176
1177                         else if (latexkeys const * l = in_word_set(name)) {
1178                                 if (l->inset == "matrix") {
1179                                         cell->push_back(createInsetMath(name));
1180                                         parse2(cell->back(), FLAG_END, mode, false);
1181                                 } else if (l->inset == "split") {
1182                                         docstring const valign = parse_verbatim_option() + 'c';
1183                                         cell->push_back(MathAtom(new InsetMathSplit(name, (char)valign[0])));
1184                                         parse2(cell->back(), FLAG_END, mode, false);
1185                                 } else {
1186                                         dump();
1187                                         lyxerr << "found math environment `" << name
1188                                                << "' in symbols file with unsupported inset `"
1189                                                << l->inset << "'." << endl;
1190                                         // create generic environment inset
1191                                         cell->push_back(MathAtom(new InsetMathEnv(name)));
1192                                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1193                                 }
1194                         }
1195
1196                         else {
1197                                 dump();
1198                                 lyxerr << "found unknown math environment '" << name << "'" << endl;
1199                                 // create generic environment inset
1200                                 cell->push_back(MathAtom(new InsetMathEnv(name)));
1201                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1202                         }
1203                 }
1204
1205                 else if (t.cs() == "kern") {
1206 #ifdef WITH_WARNINGS
1207 #warning A hack...
1208 #endif
1209                         docstring s;
1210                         while (true) {
1211                                 Token const & t = getToken();
1212                                 if (!good()) {
1213                                         putback();
1214                                         break;
1215                                 }
1216                                 s += t.character();
1217                                 if (isValidLength(to_utf8(s)))
1218                                         break;
1219                         }
1220                         cell->push_back(MathAtom(new InsetMathKern(s)));
1221                 }
1222
1223                 else if (t.cs() == "label") {
1224                         // FIXME: This is swallowed in inline formulas
1225                         docstring label = parse_verbatim_item();
1226                         MathArray ar;
1227                         asArray(label, ar);
1228                         if (grid.asHullInset()) {
1229                                 grid.asHullInset()->label(cellrow, label);
1230                         } else {
1231                                 cell->push_back(createInsetMath(t.cs()));
1232                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
1233                         }
1234                 }
1235
1236                 else if (t.cs() == "choose" || t.cs() == "over" || t.cs() == "atop") {
1237                         MathAtom at = createInsetMath(t.cs());
1238                         at.nucleus()->cell(0) = *cell;
1239                         cell->clear();
1240                         parse(at.nucleus()->cell(1), flags, mode);
1241                         cell->push_back(at);
1242                         return;
1243                 }
1244
1245                 else if (t.cs() == "color") {
1246                         docstring const color = parse_verbatim_item();
1247                         cell->push_back(MathAtom(new InsetMathColor(true, color)));
1248                         parse(cell->back().nucleus()->cell(0), flags, mode);
1249                         return;
1250                 }
1251
1252                 else if (t.cs() == "textcolor") {
1253                         docstring const color = parse_verbatim_item();
1254                         cell->push_back(MathAtom(new InsetMathColor(false, color)));
1255                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1256                 }
1257
1258                 else if (t.cs() == "normalcolor") {
1259                         cell->push_back(createInsetMath(t.cs()));
1260                         parse(cell->back().nucleus()->cell(0), flags, mode);
1261                         return;
1262                 }
1263
1264                 else if (t.cs() == "substack") {
1265                         cell->push_back(createInsetMath(t.cs()));
1266                         parse2(cell->back(), FLAG_ITEM, mode, false);
1267                 }
1268
1269                 else if (t.cs() == "xymatrix") {
1270                         cell->push_back(createInsetMath(t.cs()));
1271                         parse2(cell->back(), FLAG_ITEM, mode, false);
1272                 }
1273
1274                 else if (t.cs() == "framebox" || t.cs() == "makebox") {
1275                         cell->push_back(createInsetMath(t.cs()));
1276                         parse(cell->back().nucleus()->cell(0), FLAG_OPTION, InsetMath::TEXT_MODE);
1277                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, InsetMath::TEXT_MODE);
1278                         parse(cell->back().nucleus()->cell(2), FLAG_ITEM, InsetMath::TEXT_MODE);
1279                 }
1280
1281                 else if (t.cs() == "tag") {
1282                         if (nextToken().character() == '*') {
1283                                 getToken();
1284                                 cell->push_back(createInsetMath(t.cs() + '*'));
1285                         } else
1286                                 cell->push_back(createInsetMath(t.cs()));
1287                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1288                 }
1289
1290 #if 0
1291                 else if (t.cs() == "infer") {
1292                         MathArray ar;
1293                         parse(ar, FLAG_OPTION, mode);
1294                         cell->push_back(createInsetMath(t.cs()));
1295                         parse2(cell->back(), FLAG_ITEM, mode, false);
1296                 }
1297
1298                 // Disabled
1299                 else if (1 && t.cs() == "ar") {
1300                         auto_ptr<InsetMathXYArrow> p(new InsetMathXYArrow);
1301                         // try to read target
1302                         parse(p->cell(0), FLAG_OTPTION, mode);
1303                         // try to read label
1304                         if (nextToken().cat() == catSuper || nextToken().cat() == catSub) {
1305                                 p->up_ = nextToken().cat() == catSuper;
1306                                 getToken();
1307                                 parse(p->cell(1), FLAG_ITEM, mode);
1308                                 //lyxerr << "read label: " << p->cell(1) << endl;
1309                         }
1310
1311                         cell->push_back(MathAtom(p.release()));
1312                         //lyxerr << "read cell: " << cell << endl;
1313                 }
1314 #endif
1315
1316                 else if (t.cs().size()) {
1317                         latexkeys const * l = in_word_set(t.cs());
1318                         if (l) {
1319                                 if (l->inset == "big") {
1320                                         skipSpaces();
1321                                         docstring const delim = getToken().asInput();
1322                                         if (InsetMathBig::isBigInsetDelim(delim))
1323                                                 cell->push_back(MathAtom(
1324                                                         new InsetMathBig(t.cs(), delim)));
1325                                         else {
1326                                                 cell->push_back(createInsetMath(t.cs()));
1327                                                 putback();
1328                                         }
1329                                 }
1330
1331                                 else if (l->inset == "font") {
1332                                         cell->push_back(createInsetMath(t.cs()));
1333                                         parse(cell->back().nucleus()->cell(0),
1334                                                 FLAG_ITEM, asMode(mode, l->extra));
1335                                 }
1336
1337                                 else if (l->inset == "oldfont") {
1338                                         cell->push_back(createInsetMath(t.cs()));
1339                                         parse(cell->back().nucleus()->cell(0),
1340                                                 flags | FLAG_ALIGN, asMode(mode, l->extra));
1341                                         if (prevToken().cat() != catAlign &&
1342                                             prevToken().cs() != "\\")
1343                                                 return;
1344                                         putback();
1345                                 }
1346
1347                                 else if (l->inset == "style") {
1348                                         cell->push_back(createInsetMath(t.cs()));
1349                                         parse(cell->back().nucleus()->cell(0),
1350                                                 flags | FLAG_ALIGN, mode);
1351                                         if (prevToken().cat() != catAlign &&
1352                                             prevToken().cs() != "\\")
1353                                                 return;
1354                                         putback();
1355                                 }
1356
1357                                 else {
1358                                         MathAtom at = createInsetMath(t.cs());
1359                                         for (InsetMath::idx_type i = 0; i < at->nargs(); ++i)
1360                                                 parse(at.nucleus()->cell(i),
1361                                                         FLAG_ITEM, asMode(mode, l->extra));
1362                                         cell->push_back(at);
1363                                 }
1364                         }
1365
1366                         else {
1367                                 MathAtom at = createInsetMath(t.cs());
1368                                 InsetMath::mode_type m = mode;
1369                                 //if (m == InsetMath::UNDECIDED_MODE)
1370                                 //lyxerr << "default creation: m1: " << m << endl;
1371                                 if (at->currentMode() != InsetMath::UNDECIDED_MODE)
1372                                         m = at->currentMode();
1373                                 //lyxerr << "default creation: m2: " << m << endl;
1374                                 InsetMath::idx_type start = 0;
1375                                 // this fails on \bigg[...\bigg]
1376                                 //MathArray opt;
1377                                 //parse(opt, FLAG_OPTION, InsetMath::VERBATIM_MODE);
1378                                 //if (opt.size()) {
1379                                 //      start = 1;
1380                                 //      at.nucleus()->cell(0) = opt;
1381                                 //}
1382                                 for (InsetMath::idx_type i = start; i < at->nargs(); ++i) {
1383                                         parse(at.nucleus()->cell(i), FLAG_ITEM, m);
1384                                         skipSpaces();
1385                                 }
1386                                 cell->push_back(at);
1387                         }
1388                 }
1389
1390
1391                 if (flags & FLAG_LEAVE) {
1392                         flags &= ~FLAG_LEAVE;
1393                         break;
1394                 }
1395         }
1396 }
1397
1398
1399
1400 } // anonymous namespace
1401
1402
1403 void mathed_parse_cell(MathArray & ar, docstring const & str)
1404 {
1405         istringstream is(to_utf8(str));
1406         mathed_parse_cell(ar, is);
1407 }
1408
1409
1410 void mathed_parse_cell(MathArray & ar, istream & is)
1411 {
1412         Parser(is).parse(ar, 0, InsetMath::MATH_MODE);
1413 }
1414
1415
1416 bool mathed_parse_normal(MathAtom & t, string const & str)
1417 {
1418         istringstream is(str);
1419         return Parser(is).parse(t);
1420 }
1421
1422
1423 bool mathed_parse_normal(MathAtom & t, istream & is)
1424 {
1425         return Parser(is).parse(t);
1426 }
1427
1428
1429 bool mathed_parse_normal(MathAtom & t, LyXLex & lex)
1430 {
1431         return Parser(lex).parse(t);
1432 }
1433
1434
1435 void mathed_parse_normal(InsetMathGrid & grid, string const & str)
1436 {
1437         istringstream is(str);
1438         Parser(is).parse1(grid, 0, InsetMath::MATH_MODE, false);
1439 }
1440
1441
1442 void initParser()
1443 {
1444         fill(theCatcode, theCatcode + 256, catOther);
1445         fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
1446         fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
1447
1448         theCatcode[int('\\')] = catEscape;
1449         theCatcode[int('{')]  = catBegin;
1450         theCatcode[int('}')]  = catEnd;
1451         theCatcode[int('$')]  = catMath;
1452         theCatcode[int('&')]  = catAlign;
1453         theCatcode[int('\n')] = catNewline;
1454         theCatcode[int('#')]  = catParameter;
1455         theCatcode[int('^')]  = catSuper;
1456         theCatcode[int('_')]  = catSub;
1457         theCatcode[int(0x7f)] = catIgnore;
1458         theCatcode[int(' ')]  = catSpace;
1459         theCatcode[int('\t')] = catSpace;
1460         theCatcode[int('\r')] = catNewline;
1461         theCatcode[int('~')]  = catActive;
1462         theCatcode[int('%')]  = catComment;
1463 }
1464
1465
1466 } // namespace lyx