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::ostream;
  82 using std::vector;
  83
  84
  85 //#define FILEDEBUG
  86
  87
  88 namespace {
  89
  90 InsetMath::mode_type asMode(InsetMath::mode_type oldmode, docstring const & str)
  91 {
  92         //lyxerr << "handling mode: '" << str << "'" << endl;
  93         if (str == "mathmode")
  94                 return InsetMath::MATH_MODE;
  95         if (str == "textmode" || str == "forcetext")
  96                 return InsetMath::TEXT_MODE;
  97         return oldmode;
  98 }
  99
 100
 101 bool stared(docstring const & s)
 102 {
 103         size_t const n = s.size();
 104         return n && s[n - 1] == '*';
 105 }
 106
 107
 108 /*!
 109  * Add the row \p cellrow to \p grid.
 110  * \returns wether the row could be added. Adding a row can fail for
 111  * environments like "equation" that have a fixed number of rows.
 112  */
 113 bool addRow(InsetMathGrid & grid, InsetMathGrid::row_type & cellrow,
 114             docstring const & vskip)
 115 {
 116         ++cellrow;
 117         if (cellrow == grid.nrows()) {
 118                 //lyxerr << "adding row " << cellrow << endl;
 119                 grid.addRow(cellrow - 1);
 120                 if (cellrow == grid.nrows()) {
 121                         // We can't add a row to this grid, so let's
 122                         // append the content of this cell to the previous
 123                         // one.
 124                         // This does not happen in well formed .lyx files,
 125                         // but LyX versions 1.3.x and older could create
 126                         // such files and tex2lyx can still do that.
 127                         --cellrow;
 128                         lyxerr << "ignoring extra row";
 129                         if (!vskip.empty())
 130                                 lyxerr << " with extra space " << to_utf8(vskip);
 131                         lyxerr << '.' << endl;
 132                         return false;
 133                 }
 134         }
 135         grid.vcrskip(LyXLength(to_utf8(vskip)), cellrow - 1);
 136         return true;
 137 }
 138
 139
 140 /*!
 141  * Add the column \p cellcol to \p grid.
 142  * \returns wether the column could be added. Adding a column can fail for
 143  * environments like "eqnarray" that have a fixed number of columns.
 144  */
 145 bool addCol(InsetMathGrid & grid, InsetMathGrid::col_type & cellcol)
 146 {
 147         ++cellcol;
 148         if (cellcol == grid.ncols()) {
 149                 //lyxerr << "adding column " << cellcol << endl;
 150                 grid.addCol(cellcol - 1);
 151                 if (cellcol == grid.ncols()) {
 152                         // We can't add a column to this grid, so let's
 153                         // append the content of this cell to the previous
 154                         // one.
 155                         // This does not happen in well formed .lyx files,
 156                         // but LyX versions 1.3.x and older could create
 157                         // such files and tex2lyx can still do that.
 158                         --cellcol;
 159                         lyxerr << "ignoring extra column." << endl;
 160                         return false;
 161                 }
 162         }
 163         return true;
 164 }
 165
 166
 167 /*!
 168  * Check wether the last row is empty and remove it if yes.
 169  * Otherwise the following code
 170  * \verbatim
 171 \begin{array}{|c|c|}
 172 \hline
 173 1 & 2 \\ \hline
 174 3 & 4 \\ \hline
 175 \end{array}
 176  * \endverbatim
 177  * will result in a grid with 3 rows (+ the dummy row that is always present),
 178  * because the last '\\' opens a new row.
 179  */
 180 void delEmptyLastRow(InsetMathGrid & grid)
 181 {
 182         InsetMathGrid::row_type const row = grid.nrows() - 1;
 183         for (InsetMathGrid::col_type col = 0; col < grid.ncols(); ++col) {
 184                 if (!grid.cell(grid.index(row, col)).empty())
 185                         return;
 186         }
 187         // Copy the row information of the empty row (which would contain the
 188         // last hline in the example above) to the dummy row and delete the
 189         // empty row.
 190         grid.rowinfo(row + 1) = grid.rowinfo(row);
 191         grid.delRow(row);
 192 }
 193
 194
 195 // These are TeX's catcodes
 196 enum CatCode {
 197         catEscape,     // 0    backslash
 198         catBegin,      // 1    {
 199         catEnd,        // 2    }
 200         catMath,       // 3    $
 201         catAlign,      // 4    &
 202         catNewline,    // 5    ^^M
 203         catParameter,  // 6    #
 204         catSuper,      // 7    ^
 205         catSub,        // 8    _
 206         catIgnore,     // 9
 207         catSpace,      // 10   space
 208         catLetter,     // 11   a-zA-Z
 209         catOther,      // 12   none of the above
 210         catActive,     // 13   ~
 211         catComment,    // 14   %
 212         catInvalid     // 15   <delete>
 213 };
 214
 215 CatCode theCatcode[128];
 216
 217
 218 inline CatCode catcode(char_type c)
 219 {
 220         /* The only characters that are not catOther lie in the pure ASCII
 221          * range. Therefore theCatcode has only 128 entries.
 222          * TeX itself deals with 8bit characters, so if needed this table
 223          * could be enlarged to 256 entries.
 224          * Any larger value does not make sense, since the fact that we use
 225          * unicode internally does not change Knuth's TeX engine.
 226          * Apart from that a table for the full 21bit UCS4 range would waste
 227          * too much memory. */
 228         if (c >= 128)
 229                 return catOther;
 230
 231         return theCatcode[c];
 232 }
 233
 234
 235 enum {
 236         FLAG_ALIGN      = 1 << 0,  //  next & or \\ ends the parsing process
 237         FLAG_BRACE_LAST = 1 << 1,  //  next closing brace ends the parsing
 238         FLAG_RIGHT      = 1 << 2,  //  next \\right ends the parsing process
 239         FLAG_END        = 1 << 3,  //  next \\end ends the parsing process
 240         FLAG_BRACK_LAST = 1 << 4,  //  next closing bracket ends the parsing
 241         FLAG_TEXTMODE   = 1 << 5,  //  we are in a box
 242         FLAG_ITEM       = 1 << 6,  //  read a (possibly braced token)
 243         FLAG_LEAVE      = 1 << 7,  //  leave the loop at the end
 244         FLAG_SIMPLE     = 1 << 8,  //  next $ leaves the loop
 245         FLAG_EQUATION   = 1 << 9,  //  next \] leaves the loop
 246         FLAG_SIMPLE2    = 1 << 10, //  next \) leaves the loop
 247         FLAG_OPTION     = 1 << 11, //  read [...] style option
 248         FLAG_BRACED     = 1 << 12  //  read {...} style argument
 249 };
 250
 251
 252 //
 253 // Helper class for parsing
 254 //
 255
 256 class Token {
 257 public:
 258         ///
 259         Token() : cs_(), char_(0), cat_(catIgnore) {}
 260         ///
 261         Token(char_type c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
 262         ///
 263         Token(docstring const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
 264
 265         ///
 266         docstring const & cs() const { return cs_; }
 267         ///
 268         CatCode cat() const { return cat_; }
 269         ///
 270         char_type character() const { return char_; }
 271         ///
 272         docstring asString() const { return cs_.size() ? cs_ : docstring(1, char_); }
 273         ///
 274         docstring asInput() const { return cs_.size() ? '\\' + cs_ : docstring(1, char_); }
 275
 276 private:
 277         ///
 278         docstring cs_;
 279         ///
 280         char_type char_;
 281         ///
 282         CatCode cat_;
 283 };
 284
 285 ostream & operator<<(ostream & os, Token const & t)
 286 {
 287         if (t.cs().size()) {
 288                 docstring const & cs = t.cs();
 289                 // FIXME: For some strange reason, the stream operator instanciate
 290                 // a new Token before outputting the contents of t.cs().
 291                 // Because of this the line
 292                 //     os << '\\' << cs;
 293                 // below becomes recursive.
 294                 // In order to avoid that we return early:
 295                 if (cs == "\\")
 296                         return os;
 297                 os << '\\' << cs;
 298         }
 299         else if (t.cat() == catLetter)
 300                 os << t.character();
 301         else
 302                 os << '[' << t.character() << ',' << t.cat() << ']';
 303         return os;
 304 }
 305
 306
 307 class Parser {
 308 public:
 309         ///
 310         typedef  InsetMath::mode_type mode_type;
 311
 312         ///
 313         Parser(LyXLex & lex);
 314         /// Only use this for reading from .lyx file format, for the reason
 315         /// see Parser::tokenize(std::istream &).
 316         Parser(istream & is);
 317         ///
 318         Parser(docstring const & str);
 319
 320         ///
 321         bool parse(MathAtom & at);
 322         ///
 323         void parse(MathArray & array, unsigned flags, mode_type mode);
 324         ///
 325         void parse1(InsetMathGrid & grid, unsigned flags, mode_type mode,
 326                 bool numbered);
 327         ///
 328         MathArray parse(unsigned flags, mode_type mode);
 329         ///
 330         int lineno() const { return lineno_; }
 331         ///
 332         void putback();
 333
 334 private:
 335         ///
 336         void parse2(MathAtom & at, unsigned flags, mode_type mode, bool numbered);
 337         /// get arg delimited by 'left' and 'right'
 338         docstring getArg(char_type left, char_type right);
 339         ///
 340         char_type getChar();
 341         ///
 342         void error(string const & msg);
 343         void error(docstring const & msg) { error(to_utf8(msg)); }
 344         /// dump contents to screen
 345         void dump() const;
 346         /// Only use this for reading from .lyx file format (see
 347         /// implementation for reason)
 348         void tokenize(istream & is);
 349         ///
 350         void tokenize(docstring const & s);
 351         ///
 352         void skipSpaceTokens(idocstream & is, char_type c);
 353         ///
 354         void push_back(Token const & t);
 355         ///
 356         void pop_back();
 357         ///
 358         Token const & prevToken() const;
 359         ///
 360         Token const & nextToken() const;
 361         ///
 362         Token const & getToken();
 363         /// skips spaces if any
 364         void skipSpaces();
 365         ///
 366         void lex(docstring const & s);
 367         ///
 368         bool good() const;
 369         ///
 370         docstring parse_verbatim_item();
 371         ///
 372         docstring parse_verbatim_option();
 373
 374         ///
 375         int lineno_;
 376         ///
 377         vector<Token> tokens_;
 378         ///
 379         unsigned pos_;
 380         /// Stack of active environments
 381         vector<docstring> environments_;
 382 };
 383
 384
 385 Parser::Parser(LyXLex & lexer)
 386         : lineno_(lexer.getLineNo()), pos_(0)
 387 {
 388         tokenize(lexer.getStream());
 389         lexer.eatLine();
 390 }
 391
 392
 393 Parser::Parser(istream & is)
 394         : lineno_(0), pos_(0)
 395 {
 396         tokenize(is);
 397 }
 398
 399
 400 Parser::Parser(docstring const & str)
 401         : lineno_(0), pos_(0)
 402 {
 403         tokenize(str);
 404 }
 405
 406
 407 void Parser::push_back(Token const & t)
 408 {
 409         tokens_.push_back(t);
 410 }
 411
 412
 413 void Parser::pop_back()
 414 {
 415         tokens_.pop_back();
 416 }
 417
 418
 419 Token const & Parser::prevToken() const
 420 {
 421         static const Token dummy;
 422         return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
 423 }
 424
 425
 426 Token const & Parser::nextToken() const
 427 {
 428         static const Token dummy;
 429         return good() ? tokens_[pos_] : dummy;
 430 }
 431
 432
 433 Token const & Parser::getToken()
 434 {
 435         static const Token dummy;
 436         //lyxerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << endl;
 437         return good() ? tokens_[pos_++] : dummy;
 438 }
 439
 440
 441 void Parser::skipSpaces()
 442 {
 443         while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
 444                 getToken();
 445 }
 446
 447
 448 void Parser::putback()
 449 {
 450         --pos_;
 451 }
 452
 453
 454 bool Parser::good() const
 455 {
 456         return pos_ < tokens_.size();
 457 }
 458
 459
 460 char_type Parser::getChar()
 461 {
 462         if (!good())
 463                 error("The input stream is not well...");
 464         return tokens_[pos_++].character();
 465 }
 466
 467
 468 docstring Parser::getArg(char_type left, char_type right)
 469 {
 470         skipSpaces();
 471
 472         docstring result;
 473         char_type c = getChar();
 474
 475         if (c != left)
 476                 putback();
 477         else
 478                 while ((c = getChar()) != right && good())
 479                         result += c;
 480
 481         return result;
 482 }
 483
 484
 485 void Parser::skipSpaceTokens(idocstream & is, char_type c)
 486 {
 487         // skip trailing spaces
 488         while (catcode(c) == catSpace || catcode(c) == catNewline)
 489                 if (!is.get(c))
 490                         break;
 491         //lyxerr << "putting back: " << c << endl;
 492         is.putback(c);
 493 }
 494
 495
 496 void Parser::tokenize(istream & is)
 497 {
 498         // eat everything up to the next \end_inset or end of stream
 499         // and store it in s for further tokenization
 500         string s;
 501         char c;
 502         while (is.get(c)) {
 503                 s += c;
 504                 if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
 505                         s = s.substr(0, s.size() - 10);
 506                         break;
 507                 }
 508         }
 509         // Remove the space after \end_inset
 510         if (is.get(c) && c != ' ')
 511                 is.unget();
 512
 513         // tokenize buffer
 514         tokenize(from_utf8(s));
 515 }
 516
 517
 518 void Parser::tokenize(docstring const & buffer)
 519 {
 520         idocstringstream is(buffer, ios::in | ios::binary);
 521
 522         char_type c;
 523         while (is.get(c)) {
 524                 //lyxerr << "reading c: " << c << endl;
 525
 526                 switch (catcode(c)) {
 527                         case catNewline: {
 528                                 ++lineno_;
 529                                 is.get(c);
 530                                 if (catcode(c) == catNewline)
 531                                         ; //push_back(Token("par"));
 532                                 else {
 533                                         push_back(Token('\n', catNewline));
 534                                         is.putback(c);
 535                                 }
 536                                 break;
 537                         }
 538
 539 /*
 540                         case catComment: {
 541                                 while (is.get(c) && catcode(c) != catNewline)
 542                                         ;
 543                                 ++lineno_;
 544                                 break;
 545                         }
 546 */
 547
 548                         case catEscape: {
 549                                 is.get(c);
 550                                 if (!is) {
 551                                         error("unexpected end of input");
 552                                 } else {
 553                                         docstring s(1, c);
 554                                         if (catcode(c) == catLetter) {
 555                                                 // collect letters
 556                                                 while (is.get(c) && catcode(c) == catLetter)
 557                                                         s += c;
 558                                                 skipSpaceTokens(is, c);
 559                                         }
 560                                         push_back(Token(s));
 561                                 }
 562                                 break;
 563                         }
 564
 565                         case catSuper:
 566                         case catSub: {
 567                                 push_back(Token(c, catcode(c)));
 568                                 is.get(c);
 569                                 skipSpaceTokens(is, c);
 570                                 break;
 571                         }
 572
 573                         case catIgnore: {
 574                                 lyxerr << "ignoring a char: " << int(c) << endl;
 575                                 break;
 576                         }
 577
 578                         default:
 579                                 push_back(Token(c, catcode(c)));
 580                 }
 581         }
 582
 583 #ifdef FILEDEBUG
 584         dump();
 585 #endif
 586 }
 587
 588
 589 void Parser::dump() const
 590 {
 591         lyxerr << "\nTokens: ";
 592         for (unsigned i = 0; i < tokens_.size(); ++i) {
 593                 if (i == pos_)
 594                         lyxerr << " <#> ";
 595                 lyxerr << tokens_[i];
 596         }
 597         lyxerr << " pos: " << pos_ << endl;
 598 }
 599
 600
 601 void Parser::error(string const & msg)
 602 {
 603         lyxerr << "Line ~" << lineno_ << ": Math parse error: " << msg << endl;
 604         dump();
 605         //exit(1);
 606 }
 607
 608
 609 bool Parser::parse(MathAtom & at)
 610 {
 611         skipSpaces();
 612         MathArray ar;
 613         parse(ar, false, InsetMath::UNDECIDED_MODE);
 614         if (ar.size() != 1 || ar.front()->getType() == hullNone) {
 615                 lyxerr << "unusual contents found: " << ar << endl;
 616                 at = MathAtom(new InsetMathPar(ar));
 617                 //if (at->nargs() > 0)
 618                 //      at.nucleus()->cell(0) = ar;
 619                 //else
 620                 //      lyxerr << "unusual contents found: " << ar << endl;
 621                 return true;
 622         }
 623         at = ar[0];
 624         return true;
 625 }
 626
 627
 628 docstring Parser::parse_verbatim_option()
 629 {
 630         skipSpaces();
 631         docstring res;
 632         if (nextToken().character() == '[') {
 633                 Token t = getToken();
 634                 for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
 635                         if (t.cat() == catBegin) {
 636                                 putback();
 637                                 res += '{' + parse_verbatim_item() + '}';
 638                         } else
 639                                 res += t.asString();
 640                 }
 641         }
 642         return res;
 643 }
 644
 645
 646 docstring Parser::parse_verbatim_item()
 647 {
 648         skipSpaces();
 649         docstring res;
 650         if (nextToken().cat() == catBegin) {
 651                 Token t = getToken();
 652                 for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
 653                         if (t.cat() == catBegin) {
 654                                 putback();
 655                                 res += '{' + parse_verbatim_item() + '}';
 656                         }
 657                         else
 658                                 res += t.asString();
 659                 }
 660         }
 661         return res;
 662 }
 663
 664
 665 MathArray Parser::parse(unsigned flags, mode_type mode)
 666 {
 667         MathArray ar;
 668         parse(ar, flags, mode);
 669         return ar;
 670 }
 671
 672
 673 void Parser::parse(MathArray & array, unsigned flags, mode_type mode)
 674 {
 675         InsetMathGrid grid(1, 1);
 676         parse1(grid, flags, mode, false);
 677         array = grid.cell(0);
 678 }
 679
 680
 681 void Parser::parse2(MathAtom & at, const unsigned flags, const mode_type mode,
 682         const bool numbered)
 683 {
 684         parse1(*(at.nucleus()->asGridInset()), flags, mode, numbered);
 685 }
 686
 687
 688 void Parser::parse1(InsetMathGrid & grid, unsigned flags,
 689         const mode_type mode, const bool numbered)
 690 {
 691         int limits = 0;
 692         InsetMathGrid::row_type cellrow = 0;
 693         InsetMathGrid::col_type cellcol = 0;
 694         MathArray * cell = &grid.cell(grid.index(cellrow, cellcol));
 695
 696         if (grid.asHullInset())
 697                 grid.asHullInset()->numbered(cellrow, numbered);
 698
 699         //dump();
 700         //lyxerr << " flags: " << flags << endl;
 701         //lyxerr << " mode: " << mode  << endl;
 702         //lyxerr << "grid: " << grid << endl;
 703
 704         while (good()) {
 705                 Token const & t = getToken();
 706
 707 #ifdef FILEDEBUG
 708                 lyxerr << "t: " << t << " flags: " << flags << endl;
 709                 lyxerr << "mode: " << mode  << endl;
 710                 cell->dump();
 711                 lyxerr << endl;
 712 #endif
 713
 714                 if (flags & FLAG_ITEM) {
 715
 716                         if (t.cat() == catBegin) {
 717                                 // skip the brace and collect everything to the next matching
 718                                 // closing brace
 719                                 parse1(grid, FLAG_BRACE_LAST, mode, numbered);
 720                                 return;
 721                         }
 722
 723                         // handle only this single token, leave the loop if done
 724                         flags = FLAG_LEAVE;
 725                 }
 726
 727
 728                 if (flags & FLAG_BRACED) {
 729                         if (t.cat() == catSpace)
 730                                 continue;
 731
 732                         if (t.cat() != catBegin) {
 733                                 error("opening brace expected");
 734                                 return;
 735                         }
 736
 737                         // skip the brace and collect everything to the next matching
 738                         // closing brace
 739                         flags = FLAG_BRACE_LAST;
 740                 }
 741
 742
 743                 if (flags & FLAG_OPTION) {
 744                         if (t.cat() == catOther && t.character() == '[') {
 745                                 MathArray ar;
 746                                 parse(ar, FLAG_BRACK_LAST, mode);
 747                                 cell->append(ar);
 748                         } else {
 749                                 // no option found, put back token and we are done
 750                                 putback();
 751                         }
 752                         return;
 753                 }
 754
 755                 //
 756                 // cat codes
 757                 //
 758                 if (t.cat() == catMath) {
 759                         if (mode != InsetMath::MATH_MODE) {
 760                                 // we are inside some text mode thingy, so opening new math is allowed
 761                                 Token const & n = getToken();
 762                                 if (n.cat() == catMath) {
 763                                         // TeX's $$...$$ syntax for displayed math
 764                                         cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
 765                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 766                                         getToken(); // skip the second '$' token
 767                                 } else {
 768                                         // simple $...$  stuff
 769                                         putback();
 770                                         cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
 771                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 772                                 }
 773                         }
 774
 775                         else if (flags & FLAG_SIMPLE) {
 776                                 // this is the end of the formula
 777                                 return;
 778                         }
 779
 780                         else {
 781                                 error("something strange in the parser");
 782                                 break;
 783                         }
 784                 }
 785
 786                 else if (t.cat() == catLetter)
 787                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 788
 789                 else if (t.cat() == catSpace && mode != InsetMath::MATH_MODE) {
 790                         if (cell->empty() || cell->back()->getChar() != ' ')
 791                                 cell->push_back(MathAtom(new InsetMathChar(t.character())));
 792                 }
 793
 794                 else if (t.cat() == catNewline && mode != InsetMath::MATH_MODE) {
 795                         if (cell->empty() || cell->back()->getChar() != ' ')
 796                                 cell->push_back(MathAtom(new InsetMathChar(' ')));
 797                 }
 798
 799                 else if (t.cat() == catParameter) {
 800                         Token const & n = getToken();
 801                         cell->push_back(MathAtom(new MathMacroArgument(n.character()-'0')));
 802                 }
 803
 804                 else if (t.cat() == catActive)
 805                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 806
 807                 else if (t.cat() == catBegin) {
 808                         MathArray ar;
 809                         parse(ar, FLAG_BRACE_LAST, mode);
 810                         // do not create a BraceInset if they were written by LyX
 811                         // this helps to keep the annoyance of  "a choose b"  to a minimum
 812                         if (ar.size() == 1 && ar[0]->extraBraces())
 813                                 cell->append(ar);
 814                         else
 815                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
 816                 }
 817
 818                 else if (t.cat() == catEnd) {
 819                         if (flags & FLAG_BRACE_LAST)
 820                                 return;
 821                         error("found '}' unexpectedly");
 822                         //BOOST_ASSERT(false);
 823                         //add(cell, '}', LM_TC_TEX);
 824                 }
 825
 826                 else if (t.cat() == catAlign) {
 827                         //lyxerr << " column now " << (cellcol + 1)
 828                         //       << " max: " << grid.ncols() << endl;
 829                         if (flags & FLAG_ALIGN)
 830                                 return;
 831                         if (addCol(grid, cellcol))
 832                                 cell = &grid.cell(grid.index(cellrow, cellcol));
 833                 }
 834
 835                 else if (t.cat() == catSuper || t.cat() == catSub) {
 836                         bool up = (t.cat() == catSuper);
 837                         // we need no new script inset if the last thing was a scriptinset,
 838                         // which has that script already not the same script already
 839                         if (!cell->size())
 840                                 cell->push_back(MathAtom(new InsetMathScript(up)));
 841                         else if (cell->back()->asScriptInset() &&
 842                                         !cell->back()->asScriptInset()->has(up))
 843                                 cell->back().nucleus()->asScriptInset()->ensure(up);
 844                         else if (cell->back()->asScriptInset())
 845                                 cell->push_back(MathAtom(new InsetMathScript(up)));
 846                         else
 847                                 cell->back() = MathAtom(new InsetMathScript(cell->back(), up));
 848                         InsetMathScript * p = cell->back().nucleus()->asScriptInset();
 849                         // special handling of {}-bases
 850                         // Here we could remove the brace inset for things
 851                         // like {a'}^2 and add the braces back in
 852                         // InsetMathScript::write().
 853                         // We do not do it, since it is not possible to detect
 854                         // reliably whether the braces are needed because the
 855                         // nucleus contains more than one symbol, or whether
 856                         // they are needed for unknown commands like \xx{a}_0
 857                         // or \yy{a}{b}_0. This was done in revision 14819
 858                         // in an unreliable way. See this thread
 859                         // http://www.mail-archive.com/lyx-devel%40lists.lyx.org/msg104917.html
 860                         // for more details.
 861                         parse(p->cell(p->idxOfScript(up)), FLAG_ITEM, mode);
 862                         if (limits) {
 863                                 p->limits(limits);
 864                                 limits = 0;
 865                         }
 866                 }
 867
 868                 else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
 869                         //lyxerr << "finished reading option" << endl;
 870                         return;
 871                 }
 872
 873                 else if (t.cat() == catOther)
 874                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 875
 876                 else if (t.cat() == catComment) {
 877                         docstring s;
 878                         while (good()) {
 879                                 Token const & t = getToken();
 880                                 if (t.cat() == catNewline)
 881                                         break;
 882                                 s += t.asString();
 883                         }
 884                         cell->push_back(MathAtom(new InsetMathComment(s)));
 885                         skipSpaces();
 886                 }
 887
 888                 //
 889                 // control sequences
 890                 //
 891
 892                 else if (t.cs() == "lyxlock") {
 893                         if (cell->size())
 894                                 cell->back().nucleus()->lock(true);
 895                 }
 896
 897                 else if (t.cs() == "def" ||
 898                         t.cs() == "newcommand" ||
 899                         t.cs() == "renewcommand")
 900                 {
 901                         docstring const type = t.cs();
 902                         docstring name;
 903                         int nargs = 0;
 904                         if (t.cs() == "def") {
 905                                 // get name
 906                                 name = getToken().cs();
 907
 908                                 // read parameter
 909                                 docstring pars;
 910                                 while (good() && nextToken().cat() != catBegin) {
 911                                         pars += getToken().cs();
 912                                         ++nargs;
 913                                 }
 914                                 nargs /= 2;
 915                                 //lyxerr << "read \\def parameter list '" << pars << "'" << endl;
 916
 917                         } else { // t.cs() == "newcommand" || t.cs() == "renewcommand"
 918
 919                                 if (getToken().cat() != catBegin) {
 920                                         error("'{' in \\newcommand expected (1) ");
 921                                         return;
 922                                 }
 923
 924                                 name = getToken().cs();
 925
 926                                 if (getToken().cat() != catEnd) {
 927                                         error("'}' in \\newcommand expected");
 928                                         return;
 929                                 }
 930
 931                                 docstring const arg = getArg('[', ']');
 932                                 if (!arg.empty())
 933                                         nargs = convert<int>(arg);
 934
 935                         }
 936
 937                         MathArray ar1;
 938                         parse(ar1, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
 939
 940                         // we cannot handle recursive stuff at all
 941                         //MathArray test;
 942                         //test.push_back(createInsetMath(name));
 943                         //if (ar1.contains(test)) {
 944                         //      error("we cannot handle recursive macros at all.");
 945                         //      return;
 946                         //}
 947
 948                         // is a version for display attached?
 949                         skipSpaces();
 950                         MathArray ar2;
 951                         if (nextToken().cat() == catBegin)
 952                                 parse(ar2, FLAG_ITEM, InsetMath::MATH_MODE);
 953
 954                         cell->push_back(MathAtom(new MathMacroTemplate(name, nargs, type,
 955                                 ar1, ar2)));
 956                 }
 957
 958                 else if (t.cs() == "(") {
 959                         cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
 960                         parse2(cell->back(), FLAG_SIMPLE2, InsetMath::MATH_MODE, false);
 961                 }
 962
 963                 else if (t.cs() == "[") {
 964                         cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
 965                         parse2(cell->back(), FLAG_EQUATION, InsetMath::MATH_MODE, false);
 966                 }
 967
 968                 else if (t.cs() == "protect")
 969                         // ignore \\protect, will hopefully be re-added during output
 970                         ;
 971
 972                 else if (t.cs() == "end") {
 973                         if (flags & FLAG_END) {
 974                                 // eat environment name
 975                                 docstring const name = getArg('{', '}');
 976                                 if (environments_.empty())
 977                                         error("'found \\end{" + name +
 978                                               "}' without matching '\\begin{" +
 979                                               name + "}'");
 980                                 else if (name != environments_.back())
 981                                         error("'\\end{" + name +
 982                                               "}' does not match '\\begin{" +
 983                                               environments_.back() + "}'");
 984                                 else {
 985                                         environments_.pop_back();
 986                                         // Delete empty last row in matrix
 987                                         // like insets.
 988                                         // If you abuse InsetMathGrid for
 989                                         // non-matrix like structures you
 990                                         // probably need to refine this test.
 991                                         // Right now we only have to test for
 992                                         // single line hull insets.
 993                                         if (grid.nrows() > 1)
 994                                                 delEmptyLastRow(grid);
 995                                         return;
 996                                 }
 997                         } else
 998                                 error("found 'end' unexpectedly");
 999                 }
1000
1001                 else if (t.cs() == ")") {
1002                         if (flags & FLAG_SIMPLE2)
1003                                 return;
1004                         error("found '\\)' unexpectedly");
1005                 }
1006
1007                 else if (t.cs() == "]") {
1008                         if (flags & FLAG_EQUATION)
1009                                 return;
1010                         error("found '\\]' unexpectedly");
1011                 }
1012
1013                 else if (t.cs() == "\\") {
1014                         if (flags & FLAG_ALIGN)
1015                                 return;
1016                         if (addRow(grid, cellrow, getArg('[', ']'))) {
1017                                 cellcol = 0;
1018                                 if (grid.asHullInset())
1019                                         grid.asHullInset()->numbered(
1020                                                         cellrow, numbered);
1021                                 cell = &grid.cell(grid.index(cellrow,
1022                                                              cellcol));
1023                         }
1024                 }
1025
1026 #if 0
1027                 else if (t.cs() == "multicolumn") {
1028                         // extract column count and insert dummy cells
1029                         MathArray count;
1030                         parse(count, FLAG_ITEM, mode);
1031                         int cols = 1;
1032                         if (!extractNumber(count, cols)) {
1033                                 lyxerr << " can't extract number of cells from " << count << endl;
1034                         }
1035                         // resize the table if necessary
1036                         for (int i = 0; i < cols; ++i) {
1037                                 if (addCol(grid, cellcol)) {
1038                                         cell = &grid.cell(grid.index(
1039                                                         cellrow, cellcol));
1040                                         // mark this as dummy
1041                                         grid.cellinfo(grid.index(
1042                                                 cellrow, cellcol)).dummy_ = true;
1043                                 }
1044                         }
1045                         // the last cell is the real thing, not a dummy
1046                         grid.cellinfo(grid.index(cellrow, cellcol)).dummy_ = false;
1047
1048                         // read special alignment
1049                         MathArray align;
1050                         parse(align, FLAG_ITEM, mode);
1051                         //grid.cellinfo(grid.index(cellrow, cellcol)).align_ = extractString(align);
1052
1053                         // parse the remaining contents into the "real" cell
1054                         parse(*cell, FLAG_ITEM, mode);
1055                 }
1056 #endif
1057
1058                 else if (t.cs() == "limits")
1059                         limits = 1;
1060
1061                 else if (t.cs() == "nolimits")
1062                         limits = -1;
1063
1064                 else if (t.cs() == "nonumber") {
1065                         if (grid.asHullInset())
1066                                 grid.asHullInset()->numbered(cellrow, false);
1067                 }
1068
1069                 else if (t.cs() == "number") {
1070                         if (grid.asHullInset())
1071                                 grid.asHullInset()->numbered(cellrow, true);
1072                 }
1073
1074                 else if (t.cs() == "hline") {
1075                         grid.rowinfo(cellrow).lines_ ++;
1076                 }
1077
1078                 else if (t.cs() == "sqrt") {
1079                         MathArray ar;
1080                         parse(ar, FLAG_OPTION, mode);
1081                         if (ar.size()) {
1082                                 cell->push_back(MathAtom(new InsetMathRoot));
1083                                 cell->back().nucleus()->cell(0) = ar;
1084                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1085                         } else {
1086                                 cell->push_back(MathAtom(new InsetMathSqrt));
1087                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1088                         }
1089                 }
1090
1091                 else if (t.cs() == "xrightarrow" || t.cs() == "xleftarrow") {
1092                         cell->push_back(createInsetMath(t.cs()));
1093                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1094                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1095                 }
1096
1097                 else if (t.cs() == "ref" || t.cs() == "prettyref" ||
1098                                 t.cs() == "pageref" || t.cs() == "vpageref" || t.cs() == "vref") {
1099                         cell->push_back(MathAtom(new RefInset(t.cs())));
1100                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1101                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1102                 }
1103
1104                 else if (t.cs() == "left") {
1105                         skipSpaces();
1106                         Token const & tl = getToken();
1107                         // \| and \Vert are equivalent, and InsetMathDelim
1108                         // can't handle \|
1109                         // FIXME: fix this in InsetMathDelim itself!
1110                         docstring const l = tl.cs() == "|" ? from_ascii("Vert") : tl.asString();
1111                         MathArray ar;
1112                         parse(ar, FLAG_RIGHT, mode);
1113                         skipSpaces();
1114                         Token const & tr = getToken();
1115                         docstring const r = tr.cs() == "|" ? from_ascii("Vert") : tr.asString();
1116                         cell->push_back(MathAtom(new InsetMathDelim(l, r, ar)));
1117                 }
1118
1119                 else if (t.cs() == "right") {
1120                         if (flags & FLAG_RIGHT)
1121                                 return;
1122                         //lyxerr << "got so far: '" << cell << "'" << endl;
1123                         error("Unmatched right delimiter");
1124                         return;
1125                 }
1126
1127                 else if (t.cs() == "begin") {
1128                         docstring const name = getArg('{', '}');
1129                         environments_.push_back(name);
1130
1131                         if (name == "array" || name == "subarray") {
1132                                 docstring const valign = parse_verbatim_option() + 'c';
1133                                 docstring const halign = parse_verbatim_item();
1134                                 cell->push_back(MathAtom(new InsetMathArray(name, (char)valign[0], halign)));
1135                                 parse2(cell->back(), FLAG_END, mode, false);
1136                         }
1137
1138                         else if (name == "tabular") {
1139                                 docstring const valign = parse_verbatim_option() + 'c';
1140                                 docstring const halign = parse_verbatim_item();
1141                                 cell->push_back(MathAtom(new InsetMathTabular(name, (char)valign[0], halign)));
1142                                 parse2(cell->back(), FLAG_END, InsetMath::TEXT_MODE, false);
1143                         }
1144
1145                         else if (name == "split" || name == "cases") {
1146                                 cell->push_back(createInsetMath(name));
1147                                 parse2(cell->back(), FLAG_END, mode, false);
1148                         }
1149
1150                         else if (name == "alignedat") {
1151                                 docstring const valign = parse_verbatim_option() + 'c';
1152                                 // ignore this for a while
1153                                 getArg('{', '}');
1154                                 cell->push_back(MathAtom(new InsetMathSplit(name, (char)valign[0])));
1155                                 parse2(cell->back(), FLAG_END, mode, false);
1156                         }
1157
1158                         else if (name == "math") {
1159                                 cell->push_back(MathAtom(new InsetMathHull(hullSimple)));
1160                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, true);
1161                         }
1162
1163                         else if (name == "equation" || name == "equation*"
1164                                         || name == "displaymath") {
1165                                 cell->push_back(MathAtom(new InsetMathHull(hullEquation)));
1166                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, (name == "equation"));
1167                         }
1168
1169                         else if (name == "eqnarray" || name == "eqnarray*") {
1170                                 cell->push_back(MathAtom(new InsetMathHull(hullEqnArray)));
1171                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1172                         }
1173
1174                         else if (name == "align" || name == "align*") {
1175                                 cell->push_back(MathAtom(new InsetMathHull(hullAlign)));
1176                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1177                         }
1178
1179                         else if (name == "flalign" || name == "flalign*") {
1180                                 cell->push_back(MathAtom(new InsetMathHull(hullFlAlign)));
1181                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1182                         }
1183
1184                         else if (name == "alignat" || name == "alignat*") {
1185                                 // ignore this for a while
1186                                 getArg('{', '}');
1187                                 cell->push_back(MathAtom(new InsetMathHull(hullAlignAt)));
1188                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1189                         }
1190
1191                         else if (name == "xalignat" || name == "xalignat*") {
1192                                 // ignore this for a while
1193                                 getArg('{', '}');
1194                                 cell->push_back(MathAtom(new InsetMathHull(hullXAlignAt)));
1195                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1196                         }
1197
1198                         else if (name == "xxalignat") {
1199                                 // ignore this for a while
1200                                 getArg('{', '}');
1201                                 cell->push_back(MathAtom(new InsetMathHull(hullXXAlignAt)));
1202                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1203                         }
1204
1205                         else if (name == "multline" || name == "multline*") {
1206                                 cell->push_back(MathAtom(new InsetMathHull(hullMultline)));
1207                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1208                         }
1209
1210                         else if (name == "gather" || name == "gather*") {
1211                                 cell->push_back(MathAtom(new InsetMathHull(hullGather)));
1212                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1213                         }
1214
1215                         else if (latexkeys const * l = in_word_set(name)) {
1216                                 if (l->inset == "matrix") {
1217                                         cell->push_back(createInsetMath(name));
1218                                         parse2(cell->back(), FLAG_END, mode, false);
1219                                 } else if (l->inset == "split") {
1220                                         docstring const valign = parse_verbatim_option() + 'c';
1221                                         cell->push_back(MathAtom(new InsetMathSplit(name, (char)valign[0])));
1222                                         parse2(cell->back(), FLAG_END, mode, false);
1223                                 } else {
1224                                         dump();
1225                                         lyxerr << "found math environment `" << name
1226                                                << "' in symbols file with unsupported inset `"
1227                                                << l->inset << "'." << endl;
1228                                         // create generic environment inset
1229                                         cell->push_back(MathAtom(new InsetMathEnv(name)));
1230                                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1231                                 }
1232                         }
1233
1234                         else {
1235                                 dump();
1236                                 lyxerr << "found unknown math environment '" << name << "'" << endl;
1237                                 // create generic environment inset
1238                                 cell->push_back(MathAtom(new InsetMathEnv(name)));
1239                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1240                         }
1241                 }
1242
1243                 else if (t.cs() == "kern") {
1244 #ifdef WITH_WARNINGS
1245 #warning A hack...
1246 #endif
1247                         docstring s;
1248                         while (true) {
1249                                 Token const & t = getToken();
1250                                 if (!good()) {
1251                                         putback();
1252                                         break;
1253                                 }
1254                                 s += t.character();
1255                                 if (isValidLength(to_utf8(s)))
1256                                         break;
1257                         }
1258                         cell->push_back(MathAtom(new InsetMathKern(s)));
1259                 }
1260
1261                 else if (t.cs() == "label") {
1262                         // FIXME: This is swallowed in inline formulas
1263                         docstring label = parse_verbatim_item();
1264                         MathArray ar;
1265                         asArray(label, ar);
1266                         if (grid.asHullInset()) {
1267                                 grid.asHullInset()->label(cellrow, label);
1268                         } else {
1269                                 cell->push_back(createInsetMath(t.cs()));
1270                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
1271                         }
1272                 }
1273
1274                 else if (t.cs() == "choose" || t.cs() == "over" || t.cs() == "atop") {
1275                         MathAtom at = createInsetMath(t.cs());
1276                         at.nucleus()->cell(0) = *cell;
1277                         cell->clear();
1278                         parse(at.nucleus()->cell(1), flags, mode);
1279                         cell->push_back(at);
1280                         return;
1281                 }
1282
1283                 else if (t.cs() == "color") {
1284                         docstring const color = parse_verbatim_item();
1285                         cell->push_back(MathAtom(new InsetMathColor(true, color)));
1286                         parse(cell->back().nucleus()->cell(0), flags, mode);
1287                         return;
1288                 }
1289
1290                 else if (t.cs() == "textcolor") {
1291                         docstring const color = parse_verbatim_item();
1292                         cell->push_back(MathAtom(new InsetMathColor(false, color)));
1293                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1294                 }
1295
1296                 else if (t.cs() == "normalcolor") {
1297                         cell->push_back(createInsetMath(t.cs()));
1298                         parse(cell->back().nucleus()->cell(0), flags, mode);
1299                         return;
1300                 }
1301
1302                 else if (t.cs() == "substack") {
1303                         cell->push_back(createInsetMath(t.cs()));
1304                         parse2(cell->back(), FLAG_ITEM, mode, false);
1305                 }
1306
1307                 else if (t.cs() == "xymatrix") {
1308                         odocstringstream os;
1309                         while (good() && nextToken().cat() != catBegin)
1310                                 os << getToken().asInput();
1311                         cell->push_back(createInsetMath(t.cs() + os.str()));
1312                         parse2(cell->back(), FLAG_ITEM, mode, false);
1313                 }
1314
1315                 else if (t.cs() == "framebox" || t.cs() == "makebox") {
1316                         cell->push_back(createInsetMath(t.cs()));
1317                         parse(cell->back().nucleus()->cell(0), FLAG_OPTION, InsetMath::TEXT_MODE);
1318                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, InsetMath::TEXT_MODE);
1319                         parse(cell->back().nucleus()->cell(2), FLAG_ITEM, InsetMath::TEXT_MODE);
1320                 }
1321
1322                 else if (t.cs() == "tag") {
1323                         if (nextToken().character() == '*') {
1324                                 getToken();
1325                                 cell->push_back(createInsetMath(t.cs() + '*'));
1326                         } else
1327                                 cell->push_back(createInsetMath(t.cs()));
1328                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1329                 }
1330
1331 #if 0
1332                 else if (t.cs() == "infer") {
1333                         MathArray ar;
1334                         parse(ar, FLAG_OPTION, mode);
1335                         cell->push_back(createInsetMath(t.cs()));
1336                         parse2(cell->back(), FLAG_ITEM, mode, false);
1337                 }
1338
1339                 // Disabled
1340                 else if (1 && t.cs() == "ar") {
1341                         auto_ptr<InsetMathXYArrow> p(new InsetMathXYArrow);
1342                         // try to read target
1343                         parse(p->cell(0), FLAG_OTPTION, mode);
1344                         // try to read label
1345                         if (nextToken().cat() == catSuper || nextToken().cat() == catSub) {
1346                                 p->up_ = nextToken().cat() == catSuper;
1347                                 getToken();
1348                                 parse(p->cell(1), FLAG_ITEM, mode);
1349                                 //lyxerr << "read label: " << p->cell(1) << endl;
1350                         }
1351
1352                         cell->push_back(MathAtom(p.release()));
1353                         //lyxerr << "read cell: " << cell << endl;
1354                 }
1355 #endif
1356
1357                 else if (t.cs().size()) {
1358                         latexkeys const * l = in_word_set(t.cs());
1359                         if (l) {
1360                                 if (l->inset == "big") {
1361                                         skipSpaces();
1362                                         docstring const delim = getToken().asInput();
1363                                         if (InsetMathBig::isBigInsetDelim(delim))
1364                                                 cell->push_back(MathAtom(
1365                                                         new InsetMathBig(t.cs(), delim)));
1366                                         else {
1367                                                 cell->push_back(createInsetMath(t.cs()));
1368                                                 putback();
1369                                         }
1370                                 }
1371
1372                                 else if (l->inset == "font") {
1373                                         cell->push_back(createInsetMath(t.cs()));
1374                                         parse(cell->back().nucleus()->cell(0),
1375                                                 FLAG_ITEM, asMode(mode, l->extra));
1376                                 }
1377
1378                                 else if (l->inset == "oldfont") {
1379                                         cell->push_back(createInsetMath(t.cs()));
1380                                         parse(cell->back().nucleus()->cell(0),
1381                                                 flags | FLAG_ALIGN, asMode(mode, l->extra));
1382                                         if (prevToken().cat() != catAlign &&
1383                                             prevToken().cs() != "\\")
1384                                                 return;
1385                                         putback();
1386                                 }
1387
1388                                 else if (l->inset == "style") {
1389                                         cell->push_back(createInsetMath(t.cs()));
1390                                         parse(cell->back().nucleus()->cell(0),
1391                                                 flags | FLAG_ALIGN, mode);
1392                                         if (prevToken().cat() != catAlign &&
1393                                             prevToken().cs() != "\\")
1394                                                 return;
1395                                         putback();
1396                                 }
1397
1398                                 else {
1399                                         MathAtom at = createInsetMath(t.cs());
1400                                         for (InsetMath::idx_type i = 0; i < at->nargs(); ++i)
1401                                                 parse(at.nucleus()->cell(i),
1402                                                         FLAG_ITEM, asMode(mode, l->extra));
1403                                         cell->push_back(at);
1404                                 }
1405                         }
1406
1407                         else {
1408                                 MathAtom at = createInsetMath(t.cs());
1409                                 InsetMath::mode_type m = mode;
1410                                 //if (m == InsetMath::UNDECIDED_MODE)
1411                                 //lyxerr << "default creation: m1: " << m << endl;
1412                                 if (at->currentMode() != InsetMath::UNDECIDED_MODE)
1413                                         m = at->currentMode();
1414                                 //lyxerr << "default creation: m2: " << m << endl;
1415                                 InsetMath::idx_type start = 0;
1416                                 // this fails on \bigg[...\bigg]
1417                                 //MathArray opt;
1418                                 //parse(opt, FLAG_OPTION, InsetMath::VERBATIM_MODE);
1419                                 //if (opt.size()) {
1420                                 //      start = 1;
1421                                 //      at.nucleus()->cell(0) = opt;
1422                                 //}
1423                                 for (InsetMath::idx_type i = start; i < at->nargs(); ++i) {
1424                                         parse(at.nucleus()->cell(i), FLAG_ITEM, m);
1425                                         skipSpaces();
1426                                 }
1427                                 cell->push_back(at);
1428                         }
1429                 }
1430
1431
1432                 if (flags & FLAG_LEAVE) {
1433                         flags &= ~FLAG_LEAVE;
1434                         break;
1435                 }
1436         }
1437 }
1438
1439
1440
1441 } // anonymous namespace
1442
1443
1444 void mathed_parse_cell(MathArray & ar, docstring const & str)
1445 {
1446         Parser(str).parse(ar, 0, InsetMath::MATH_MODE);
1447 }
1448
1449
1450 void mathed_parse_cell(MathArray & ar, istream & is)
1451 {
1452         Parser(is).parse(ar, 0, InsetMath::MATH_MODE);
1453 }
1454
1455
1456 bool mathed_parse_normal(MathAtom & t, docstring const & str)
1457 {
1458         return Parser(str).parse(t);
1459 }
1460
1461
1462 bool mathed_parse_normal(MathAtom & t, LyXLex & lex)
1463 {
1464         return Parser(lex).parse(t);
1465 }
1466
1467
1468 void mathed_parse_normal(InsetMathGrid & grid, docstring const & str)
1469 {
1470         Parser(str).parse1(grid, 0, InsetMath::MATH_MODE, false);
1471 }
1472
1473
1474 void initParser()
1475 {
1476         fill(theCatcode, theCatcode + 128, catOther);
1477         fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
1478         fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
1479
1480         theCatcode[int('\\')] = catEscape;
1481         theCatcode[int('{')]  = catBegin;
1482         theCatcode[int('}')]  = catEnd;
1483         theCatcode[int('$')]  = catMath;
1484         theCatcode[int('&')]  = catAlign;
1485         theCatcode[int('\n')] = catNewline;
1486         theCatcode[int('#')]  = catParameter;
1487         theCatcode[int('^')]  = catSuper;
1488         theCatcode[int('_')]  = catSub;
1489         theCatcode[int(0x7f)] = catIgnore;
1490         theCatcode[int(' ')]  = catSpace;
1491         theCatcode[int('\t')] = catSpace;
1492         theCatcode[int('\r')] = catNewline;
1493         theCatcode[int('~')]  = catActive;
1494         theCatcode[int('%')]  = catComment;
1495 }
1496
1497
1498 } // namespace lyx