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