src/mathed/MathParser.cpp

   1 /**
   2  * \file MathParser.cpp
   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   \[\begin{array}{ccc}
  30 1
  31 &
  32
  33   \end{array}\]
  34
  35 */
  36
  37
  38 #include <config.h>
  39
  40 #include "MathParser.h"
  41
  42 #include "InsetMathArray.h"
  43 #include "InsetMathBig.h"
  44 #include "InsetMathBrace.h"
  45 #include "InsetMathChar.h"
  46 #include "InsetMathColor.h"
  47 #include "InsetMathComment.h"
  48 #include "InsetMathDelim.h"
  49 #include "InsetMathEnsureMath.h"
  50 #include "InsetMathEnv.h"
  51 #include "InsetMathFrac.h"
  52 #include "InsetMathKern.h"
  53 #include "MathMacro.h"
  54 #include "InsetMathPar.h"
  55 #include "InsetMathRef.h"
  56 #include "InsetMathRoot.h"
  57 #include "InsetMathScript.h"
  58 #include "InsetMathSpace.h"
  59 #include "InsetMathSplit.h"
  60 #include "InsetMathSqrt.h"
  61 #include "InsetMathString.h"
  62 #include "InsetMathTabular.h"
  63 #include "MathMacroTemplate.h"
  64 #include "MathFactory.h"
  65 #include "MathMacroArgument.h"
  66 #include "MathSupport.h"
  67
  68 #include "Buffer.h"
  69 #include "BufferParams.h"
  70 #include "Encoding.h"
  71 #include "Lexer.h"
  72
  73 #include "support/debug.h"
  74 #include "support/convert.h"
  75 #include "support/docstream.h"
  76
  77 #include <sstream>
  78
  79 //#define FILEDEBUG
  80
  81 using namespace std;
  82
  83 namespace lyx {
  84
  85 namespace {
  86
  87 InsetMath::mode_type asMode(InsetMath::mode_type oldmode, docstring 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(docstring const & s)
  99 {
 100         size_t const n = s.size();
 101         return n && s[n - 1] == '*';
 102 }
 103
 104
 105 docstring const repl(docstring const & oldstr, char_type const c,
 106                      docstring const & macro, bool textmode = false)
 107 {
 108         docstring newstr;
 109         size_t i;
 110         size_t j;
 111
 112         for (i = 0, j = 0; i < oldstr.size(); ++i) {
 113                 if (c == oldstr[i]) {
 114                         newstr.append(oldstr, j, i - j);
 115                         newstr.append(macro);
 116                         j = i + 1;
 117                         if (macro.size() > 2 && j < oldstr.size())
 118                                 newstr += (textmode && oldstr[j] == ' ' ? '\\' : ' ');
 119                 }
 120         }
 121
 122         // Any substitution?
 123         if (j == 0)
 124                 return oldstr;
 125
 126         newstr.append(oldstr, j, i - j);
 127         return newstr;
 128 }
 129
 130
 131 docstring escapeSpecialChars(docstring const & str, bool textmode)
 132 {
 133         docstring const backslash = textmode ? from_ascii("\\textbackslash")
 134                                              : from_ascii("\\backslash");
 135         docstring const caret = textmode ? from_ascii("\\textasciicircum")
 136                                          : from_ascii("\\mathcircumflex");
 137         docstring const tilde = textmode ? from_ascii("\\textasciitilde")
 138                                          : from_ascii("\\sim");
 139
 140         return repl(repl(repl(repl(repl(repl(repl(repl(repl(repl(str,
 141                         '\\', backslash, textmode),
 142                         '^', caret, textmode),
 143                         '~', tilde, textmode),
 144                         '_', from_ascii("\\_")),
 145                         '$', from_ascii("\\$")),
 146                         '#', from_ascii("\\#")),
 147                         '&', from_ascii("\\&")),
 148                         '%', from_ascii("\\%")),
 149                         '{', from_ascii("\\{")),
 150                         '}', from_ascii("\\}"));
 151 }
 152
 153
 154 /*!
 155  * Add the row \p cellrow to \p grid.
 156  * \returns wether the row could be added. Adding a row can fail for
 157  * environments like "equation" that have a fixed number of rows.
 158  */
 159 bool addRow(InsetMathGrid & grid, InsetMathGrid::row_type & cellrow,
 160             docstring const & vskip, bool allow_newpage_ = true)
 161 {
 162         ++cellrow;
 163         if (cellrow == grid.nrows()) {
 164                 //lyxerr << "adding row " << cellrow << endl;
 165                 grid.addRow(cellrow - 1);
 166                 if (cellrow == grid.nrows()) {
 167                         // We can't add a row to this grid, so let's
 168                         // append the content of this cell to the previous
 169                         // one.
 170                         // This does not happen in well formed .lyx files,
 171                         // but LyX versions 1.3.x and older could create
 172                         // such files and tex2lyx can still do that.
 173                         --cellrow;
 174                         lyxerr << "ignoring extra row";
 175                         if (!vskip.empty())
 176                                 lyxerr << " with extra space " << to_utf8(vskip);
 177                         if (!allow_newpage_)
 178                                 lyxerr << " with no page break allowed";
 179                         lyxerr << '.' << endl;
 180                         return false;
 181                 }
 182         }
 183         grid.vcrskip(Length(to_utf8(vskip)), cellrow - 1);
 184         grid.rowinfo(cellrow - 1).allow_newpage_ = allow_newpage_;
 185         return true;
 186 }
 187
 188
 189 /*!
 190  * Add the column \p cellcol to \p grid.
 191  * \returns wether the column could be added. Adding a column can fail for
 192  * environments like "eqnarray" that have a fixed number of columns.
 193  */
 194 bool addCol(InsetMathGrid & grid, InsetMathGrid::col_type & cellcol)
 195 {
 196         ++cellcol;
 197         if (cellcol == grid.ncols()) {
 198                 //lyxerr << "adding column " << cellcol << endl;
 199                 grid.addCol(cellcol);
 200                 if (cellcol == grid.ncols()) {
 201                         // We can't add a column to this grid, so let's
 202                         // append the content of this cell to the previous
 203                         // one.
 204                         // This does not happen in well formed .lyx files,
 205                         // but LyX versions 1.3.x and older could create
 206                         // such files and tex2lyx can still do that.
 207                         --cellcol;
 208                         lyxerr << "ignoring extra column." << endl;
 209                         return false;
 210                 }
 211         }
 212         return true;
 213 }
 214
 215
 216 /*!
 217  * Check wether the last row is empty and remove it if yes.
 218  * Otherwise the following code
 219  * \verbatim
 220 \begin{array}{|c|c|}
 221 \hline
 222 1 & 2 \\ \hline
 223 3 & 4 \\ \hline
 224 \end{array}
 225  * \endverbatim
 226  * will result in a grid with 3 rows (+ the dummy row that is always present),
 227  * because the last '\\' opens a new row.
 228  */
 229 void delEmptyLastRow(InsetMathGrid & grid)
 230 {
 231         InsetMathGrid::row_type const row = grid.nrows() - 1;
 232         for (InsetMathGrid::col_type col = 0; col < grid.ncols(); ++col) {
 233                 if (!grid.cell(grid.index(row, col)).empty())
 234                         return;
 235         }
 236         // Copy the row information of the empty row (which would contain the
 237         // last hline in the example above) to the dummy row and delete the
 238         // empty row.
 239         grid.rowinfo(row + 1) = grid.rowinfo(row);
 240         grid.delRow(row);
 241 }
 242
 243
 244 // These are TeX's catcodes
 245 enum CatCode {
 246         catEscape,     // 0    backslash
 247         catBegin,      // 1    {
 248         catEnd,        // 2    }
 249         catMath,       // 3    $
 250         catAlign,      // 4    &
 251         catNewline,    // 5    ^^M
 252         catParameter,  // 6    #
 253         catSuper,      // 7    ^
 254         catSub,        // 8    _
 255         catIgnore,     // 9
 256         catSpace,      // 10   space
 257         catLetter,     // 11   a-zA-Z
 258         catOther,      // 12   none of the above
 259         catActive,     // 13   ~
 260         catComment,    // 14   %
 261         catInvalid     // 15   <delete>
 262 };
 263
 264 CatCode theCatcode[128];
 265
 266
 267 inline CatCode catcode(char_type c)
 268 {
 269         /* The only characters that are not catOther lie in the pure ASCII
 270          * range. Therefore theCatcode has only 128 entries.
 271          * TeX itself deals with 8bit characters, so if needed this table
 272          * could be enlarged to 256 entries.
 273          * Any larger value does not make sense, since the fact that we use
 274          * unicode internally does not change Knuth's TeX engine.
 275          * Apart from that a table for the full 21bit UCS4 range would waste
 276          * too much memory. */
 277         if (c >= 128)
 278                 return catOther;
 279
 280         return theCatcode[c];
 281 }
 282
 283
 284 enum {
 285         FLAG_ALIGN      = 1 << 0,  //  next & or \\ ends the parsing process
 286         FLAG_BRACE_LAST = 1 << 1,  //  next closing brace ends the parsing
 287         FLAG_RIGHT      = 1 << 2,  //  next \\right ends the parsing process
 288         FLAG_END        = 1 << 3,  //  next \\end ends the parsing process
 289         FLAG_BRACK_LAST = 1 << 4,  //  next closing bracket ends the parsing
 290         FLAG_TEXTMODE   = 1 << 5,  //  we are in a box
 291         FLAG_ITEM       = 1 << 6,  //  read a (possibly braced) token
 292         FLAG_LEAVE      = 1 << 7,  //  leave the loop at the end
 293         FLAG_SIMPLE     = 1 << 8,  //  next $ leaves the loop
 294         FLAG_EQUATION   = 1 << 9,  //  next \] leaves the loop
 295         FLAG_SIMPLE2    = 1 << 10, //  next \) leaves the loop
 296         FLAG_OPTION     = 1 << 11, //  read [...] style option
 297         FLAG_BRACED     = 1 << 12  //  read {...} style argument
 298 };
 299
 300
 301 //
 302 // Helper class for parsing
 303 //
 304
 305 class Token {
 306 public:
 307         ///
 308         Token() : cs_(), char_(0), cat_(catIgnore) {}
 309         ///
 310         Token(char_type c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
 311         ///
 312         explicit Token(docstring const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
 313
 314         ///
 315         docstring const & cs() const { return cs_; }
 316         ///
 317         CatCode cat() const { return cat_; }
 318         ///
 319         char_type character() const { return char_; }
 320         ///
 321         docstring asString() const { return cs_.size() ? cs_ : docstring(1, char_); }
 322         ///
 323         docstring asInput() const { return cs_.size() ? '\\' + cs_ : docstring(1, char_); }
 324
 325 private:
 326         ///
 327         docstring cs_;
 328         ///
 329         char_type char_;
 330         ///
 331         CatCode cat_;
 332 };
 333
 334
 335 ostream & operator<<(ostream & os, Token const & t)
 336 {
 337         if (t.cs().size()) {
 338                 docstring const & cs = t.cs();
 339                 // FIXME: For some strange reason, the stream operator instanciate
 340                 // a new Token before outputting the contents of t.cs().
 341                 // Because of this the line
 342                 //     os << '\\' << cs;
 343                 // below becomes recursive.
 344                 // In order to avoid that we return early:
 345                 if (cs == "\\")
 346                         return os;
 347                 os << '\\' << to_utf8(cs);
 348         }
 349         else if (t.cat() == catLetter)
 350                 os << t.character();
 351         else
 352                 os << '[' << t.character() << ',' << t.cat() << ']';
 353         return os;
 354 }
 355
 356
 357 class Parser {
 358 public:
 359         ///
 360         typedef  InsetMath::mode_type mode_type;
 361         ///
 362         typedef  Parse::flags parse_mode;
 363
 364         ///
 365         Parser(Lexer & lex, parse_mode mode, Buffer * buf);
 366         /// Only use this for reading from .lyx file format, for the reason
 367         /// see Parser::tokenize(istream &).
 368         Parser(istream & is, parse_mode mode, Buffer * buf);
 369         ///
 370         Parser(docstring const & str, parse_mode mode, Buffer * buf);
 371
 372         ///
 373         bool parse(MathAtom & at);
 374         ///
 375         bool parse(MathData & array, unsigned flags, mode_type mode);
 376         ///
 377         bool parse1(InsetMathGrid & grid, unsigned flags, mode_type mode,
 378                 bool numbered);
 379         ///
 380         MathData parse(unsigned flags, mode_type mode);
 381         ///
 382         int lineno() const { return lineno_; }
 383         ///
 384         void putback();
 385
 386 private:
 387         ///
 388         void parse2(MathAtom & at, unsigned flags, mode_type mode, bool numbered);
 389         /// get arg delimited by 'left' and 'right'
 390         docstring getArg(char_type left, char_type right);
 391         ///
 392         char_type getChar();
 393         ///
 394         void error(string const & msg);
 395         void error(docstring const & msg) { error(to_utf8(msg)); }
 396         /// dump contents to screen
 397         void dump() const;
 398         /// Only use this for reading from .lyx file format (see
 399         /// implementation for reason)
 400         void tokenize(istream & is);
 401         ///
 402         void tokenize(docstring const & s);
 403         ///
 404         void skipSpaceTokens(idocstream & is, char_type c);
 405         ///
 406         void push_back(Token const & t);
 407         ///
 408         void pop_back();
 409         ///
 410         Token const & prevToken() const;
 411         ///
 412         Token const & nextToken() const;
 413         ///
 414         Token const & getToken();
 415         /// skips spaces if any
 416         void skipSpaces();
 417         ///
 418         void lex(docstring const & s);
 419         ///
 420         bool good() const;
 421         ///
 422         docstring parse_verbatim_item();
 423         ///
 424         docstring parse_verbatim_option();
 425
 426         ///
 427         int lineno_;
 428         ///
 429         vector<Token> tokens_;
 430         ///
 431         unsigned pos_;
 432         /// Stack of active environments
 433         vector<docstring> environments_;
 434         ///
 435         parse_mode mode_;
 436         ///
 437         bool success_;
 438         ///
 439         Buffer * buffer_;
 440 };
 441
 442
 443 Parser::Parser(Lexer & lexer, parse_mode mode, Buffer * buf)
 444         : lineno_(lexer.lineNumber()), pos_(0), mode_(mode), success_(true),
 445           buffer_(buf)
 446 {
 447         tokenize(lexer.getStream());
 448         lexer.eatLine();
 449 }
 450
 451
 452 Parser::Parser(istream & is, parse_mode mode, Buffer * buf)
 453         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 454 {
 455         tokenize(is);
 456 }
 457
 458
 459 Parser::Parser(docstring const & str, parse_mode mode, Buffer * buf)
 460         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 461 {
 462         tokenize(str);
 463 }
 464
 465
 466 void Parser::push_back(Token const & t)
 467 {
 468         tokens_.push_back(t);
 469 }
 470
 471
 472 void Parser::pop_back()
 473 {
 474         tokens_.pop_back();
 475 }
 476
 477
 478 Token const & Parser::prevToken() const
 479 {
 480         static const Token dummy;
 481         return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
 482 }
 483
 484
 485 Token const & Parser::nextToken() const
 486 {
 487         static const Token dummy;
 488         return good() ? tokens_[pos_] : dummy;
 489 }
 490
 491
 492 Token const & Parser::getToken()
 493 {
 494         static const Token dummy;
 495         //lyxerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << endl;
 496         return good() ? tokens_[pos_++] : dummy;
 497 }
 498
 499
 500 void Parser::skipSpaces()
 501 {
 502         while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
 503                 getToken();
 504 }
 505
 506
 507 void Parser::putback()
 508 {
 509         --pos_;
 510 }
 511
 512
 513 bool Parser::good() const
 514 {
 515         return pos_ < tokens_.size();
 516 }
 517
 518
 519 char_type Parser::getChar()
 520 {
 521         if (!good()) {
 522                 error("The input stream is not well...");
 523                 putback();
 524                 return 0;
 525         }
 526         return tokens_[pos_++].character();
 527 }
 528
 529
 530 docstring Parser::getArg(char_type left, char_type right)
 531 {
 532         skipSpaces();
 533
 534         docstring result;
 535         char_type c = getChar();
 536
 537         if (c != left)
 538                 putback();
 539         else
 540                 while ((c = getChar()) != right && good())
 541                         result += c;
 542
 543         return result;
 544 }
 545
 546
 547 void Parser::skipSpaceTokens(idocstream & is, char_type c)
 548 {
 549         // skip trailing spaces
 550         while (catcode(c) == catSpace || catcode(c) == catNewline)
 551                 if (!is.get(c))
 552                         break;
 553         //lyxerr << "putting back: " << c << endl;
 554         is.putback(c);
 555 }
 556
 557
 558 void Parser::tokenize(istream & is)
 559 {
 560         // eat everything up to the next \end_inset or end of stream
 561         // and store it in s for further tokenization
 562         string s;
 563         char c;
 564         while (is.get(c)) {
 565                 s += c;
 566                 if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
 567                         s = s.substr(0, s.size() - 10);
 568                         break;
 569                 }
 570         }
 571         // Remove the space after \end_inset
 572         if (is.get(c) && c != ' ')
 573                 is.unget();
 574
 575         // tokenize buffer
 576         tokenize(from_utf8(s));
 577 }
 578
 579
 580 void Parser::tokenize(docstring const & buffer)
 581 {
 582         idocstringstream is(mode_ & Parse::VERBATIM
 583                         ? escapeSpecialChars(buffer, mode_ & Parse::TEXTMODE)
 584                         : buffer, ios::in | ios::binary);
 585
 586         char_type c;
 587         while (is.get(c)) {
 588                 //lyxerr << "reading c: " << c << endl;
 589
 590                 switch (catcode(c)) {
 591                         case catNewline: {
 592                                 ++lineno_;
 593                                 is.get(c);
 594                                 if (catcode(c) == catNewline)
 595                                         ; //push_back(Token("par"));
 596                                 else {
 597                                         push_back(Token('\n', catNewline));
 598                                         is.putback(c);
 599                                 }
 600                                 break;
 601                         }
 602
 603 /*
 604                         case catComment: {
 605                                 while (is.get(c) && catcode(c) != catNewline)
 606                                         ;
 607                                 ++lineno_;
 608                                 break;
 609                         }
 610 */
 611
 612                         case catEscape: {
 613                                 is.get(c);
 614                                 if (!is) {
 615                                         error("unexpected end of input");
 616                                 } else {
 617                                         docstring s(1, c);
 618                                         if (catcode(c) == catLetter) {
 619                                                 // collect letters
 620                                                 while (is.get(c) && catcode(c) == catLetter)
 621                                                         s += c;
 622                                                 skipSpaceTokens(is, c);
 623                                         }
 624                                         push_back(Token(s));
 625                                 }
 626                                 break;
 627                         }
 628
 629                         case catSuper:
 630                         case catSub: {
 631                                 push_back(Token(c, catcode(c)));
 632                                 is.get(c);
 633                                 skipSpaceTokens(is, c);
 634                                 break;
 635                         }
 636
 637                         case catIgnore: {
 638                                 if (!(mode_ & Parse::QUIET))
 639                                         lyxerr << "ignoring a char: " << int(c) << endl;
 640                                 break;
 641                         }
 642
 643                         default:
 644                                 push_back(Token(c, catcode(c)));
 645                 }
 646         }
 647
 648 #ifdef FILEDEBUG
 649         dump();
 650 #endif
 651 }
 652
 653
 654 void Parser::dump() const
 655 {
 656         lyxerr << "\nTokens: ";
 657         for (unsigned i = 0; i < tokens_.size(); ++i) {
 658                 if (i == pos_)
 659                         lyxerr << " <#> ";
 660                 lyxerr << tokens_[i];
 661         }
 662         lyxerr << " pos: " << pos_ << endl;
 663 }
 664
 665
 666 void Parser::error(string const & msg)
 667 {
 668         success_ = false;
 669         if (!(mode_ & Parse::QUIET)) {
 670                 lyxerr << "Line ~" << lineno_ << ": Math parse error: "
 671                        << msg << endl;
 672                 dump();
 673         }
 674 }
 675
 676
 677 bool Parser::parse(MathAtom & at)
 678 {
 679         skipSpaces();
 680         MathData ar(buffer_);
 681         parse(ar, false, InsetMath::UNDECIDED_MODE);
 682         if (ar.size() != 1 || ar.front()->getType() == hullNone) {
 683                 if (!(mode_ & Parse::QUIET))
 684                         lyxerr << "unusual contents found: " << ar << endl;
 685                 at = MathAtom(new InsetMathPar(buffer_, ar));
 686                 //if (at->nargs() > 0)
 687                 //      at.nucleus()->cell(0) = ar;
 688                 //else
 689                 //      lyxerr << "unusual contents found: " << ar << endl;
 690                 success_ = false;
 691         } else
 692                 at = ar[0];
 693         return success_;
 694 }
 695
 696
 697 docstring Parser::parse_verbatim_option()
 698 {
 699         skipSpaces();
 700         docstring res;
 701         if (nextToken().character() == '[') {
 702                 Token t = getToken();
 703                 for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
 704                         if (t.cat() == catBegin) {
 705                                 putback();
 706                                 res += '{' + parse_verbatim_item() + '}';
 707                         } else
 708                                 res += t.asInput();
 709                 }
 710         }
 711         return res;
 712 }
 713
 714
 715 docstring Parser::parse_verbatim_item()
 716 {
 717         skipSpaces();
 718         docstring res;
 719         if (nextToken().cat() == catBegin) {
 720                 Token t = getToken();
 721                 for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
 722                         if (t.cat() == catBegin) {
 723                                 putback();
 724                                 res += '{' + parse_verbatim_item() + '}';
 725                         }
 726                         else
 727                                 res += t.asInput();
 728                 }
 729         }
 730         return res;
 731 }
 732
 733
 734 MathData Parser::parse(unsigned flags, mode_type mode)
 735 {
 736         MathData ar(buffer_);
 737         parse(ar, flags, mode);
 738         return ar;
 739 }
 740
 741
 742 bool Parser::parse(MathData & array, unsigned flags, mode_type mode)
 743 {
 744         InsetMathGrid grid(buffer_, 1, 1);
 745         parse1(grid, flags, mode, false);
 746         array = grid.cell(0);
 747         return success_;
 748 }
 749
 750
 751 void Parser::parse2(MathAtom & at, const unsigned flags, const mode_type mode,
 752         const bool numbered)
 753 {
 754         parse1(*(at.nucleus()->asGridInset()), flags, mode, numbered);
 755 }
 756
 757
 758 bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
 759         const mode_type mode, const bool numbered)
 760 {
 761         int limits = 0;
 762         InsetMathGrid::row_type cellrow = 0;
 763         InsetMathGrid::col_type cellcol = 0;
 764         MathData * cell = &grid.cell(grid.index(cellrow, cellcol));
 765         Buffer * buf = buffer_;
 766
 767         if (grid.asHullInset())
 768                 grid.asHullInset()->numbered(cellrow, numbered);
 769
 770         //dump();
 771         //lyxerr << " flags: " << flags << endl;
 772         //lyxerr << " mode: " << mode  << endl;
 773         //lyxerr << "grid: " << grid << endl;
 774
 775         while (good()) {
 776                 Token const & t = getToken();
 777
 778 #ifdef FILEDEBUG
 779                 lyxerr << "t: " << t << " flags: " << flags << endl;
 780                 lyxerr << "mode: " << mode  << endl;
 781                 cell->dump();
 782                 lyxerr << endl;
 783 #endif
 784
 785                 if (flags & FLAG_ITEM) {
 786
 787                         if (t.cat() == catBegin) {
 788                                 // skip the brace and collect everything to the next matching
 789                                 // closing brace
 790                                 parse1(grid, FLAG_BRACE_LAST, mode, numbered);
 791                                 return success_;
 792                         }
 793
 794                         // handle only this single token, leave the loop if done
 795                         flags = FLAG_LEAVE;
 796                 }
 797
 798
 799                 if (flags & FLAG_BRACED) {
 800                         if (t.cat() == catSpace)
 801                                 continue;
 802
 803                         if (t.cat() != catBegin) {
 804                                 error("opening brace expected");
 805                                 return success_;
 806                         }
 807
 808                         // skip the brace and collect everything to the next matching
 809                         // closing brace
 810                         flags = FLAG_BRACE_LAST;
 811                 }
 812
 813
 814                 if (flags & FLAG_OPTION) {
 815                         if (t.cat() == catOther && t.character() == '[') {
 816                                 MathData ar;
 817                                 parse(ar, FLAG_BRACK_LAST, mode);
 818                                 cell->append(ar);
 819                         } else {
 820                                 // no option found, put back token and we are done
 821                                 putback();
 822                         }
 823                         return success_;
 824                 }
 825
 826                 //
 827                 // cat codes
 828                 //
 829                 if (t.cat() == catMath) {
 830                         if (mode != InsetMath::MATH_MODE) {
 831                                 // we are inside some text mode thingy, so opening new math is allowed
 832                                 Token const & n = getToken();
 833                                 if (n.cat() == catMath) {
 834                                         // TeX's $$...$$ syntax for displayed math
 835                                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
 836                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 837                                         getToken(); // skip the second '$' token
 838                                 } else {
 839                                         // simple $...$  stuff
 840                                         putback();
 841                                         if (mode == InsetMath::UNDECIDED_MODE) {
 842                                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
 843                                                 parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 844                                         } else {
 845                                                 // Don't create nested math hulls (bug #5392)
 846                                                 cell->push_back(MathAtom(new InsetMathEnsureMath(buf)));
 847                                                 parse(cell->back().nucleus()->cell(0), FLAG_SIMPLE, InsetMath::MATH_MODE);
 848                                         }
 849                                 }
 850                         }
 851
 852                         else if (flags & FLAG_SIMPLE) {
 853                                 // this is the end of the formula
 854                                 return success_;
 855                         }
 856
 857                         else {
 858                                 error("something strange in the parser");
 859                                 break;
 860                         }
 861                 }
 862
 863                 else if (t.cat() == catLetter)
 864                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 865
 866                 else if (t.cat() == catSpace && mode != InsetMath::MATH_MODE) {
 867                         if (cell->empty() || cell->back()->getChar() != ' ')
 868                                 cell->push_back(MathAtom(new InsetMathChar(t.character())));
 869                 }
 870
 871                 else if (t.cat() == catNewline && mode != InsetMath::MATH_MODE) {
 872                         if (cell->empty() || cell->back()->getChar() != ' ')
 873                                 cell->push_back(MathAtom(new InsetMathChar(' ')));
 874                 }
 875
 876                 else if (t.cat() == catParameter) {
 877                         Token const & n = getToken();
 878                         cell->push_back(MathAtom(new MathMacroArgument(n.character()-'0')));
 879                 }
 880
 881                 else if (t.cat() == catActive)
 882                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 883
 884                 else if (t.cat() == catBegin) {
 885                         MathData ar;
 886                         parse(ar, FLAG_BRACE_LAST, mode);
 887                         // do not create a BraceInset if they were written by LyX
 888                         // this helps to keep the annoyance of  "a choose b"  to a minimum
 889                         if (ar.size() == 1 && ar[0]->extraBraces())
 890                                 cell->append(ar);
 891                         else
 892                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
 893                 }
 894
 895                 else if (t.cat() == catEnd) {
 896                         if (flags & FLAG_BRACE_LAST)
 897                                 return success_;
 898                         error("found '}' unexpectedly");
 899                         //LASSERT(false, /**/);
 900                         //add(cell, '}', LM_TC_TEX);
 901                 }
 902
 903                 else if (t.cat() == catAlign) {
 904                         //lyxerr << " column now " << (cellcol + 1)
 905                         //       << " max: " << grid.ncols() << endl;
 906                         if (flags & FLAG_ALIGN)
 907                                 return success_;
 908                         if (addCol(grid, cellcol))
 909                                 cell = &grid.cell(grid.index(cellrow, cellcol));
 910                 }
 911
 912                 else if (t.cat() == catSuper || t.cat() == catSub) {
 913                         bool up = (t.cat() == catSuper);
 914                         // we need no new script inset if the last thing was a scriptinset,
 915                         // which has that script already not the same script already
 916                         if (!cell->size())
 917                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 918                         else if (cell->back()->asScriptInset() &&
 919                                         !cell->back()->asScriptInset()->has(up))
 920                                 cell->back().nucleus()->asScriptInset()->ensure(up);
 921                         else if (cell->back()->asScriptInset())
 922                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 923                         else
 924                                 cell->back() = MathAtom(new InsetMathScript(buf, cell->back(), up));
 925                         InsetMathScript * p = cell->back().nucleus()->asScriptInset();
 926                         // special handling of {}-bases
 927                         // Here we could remove the brace inset for things
 928                         // like {a'}^2 and add the braces back in
 929                         // InsetMathScript::write().
 930                         // We do not do it, since it is not possible to detect
 931                         // reliably whether the braces are needed because the
 932                         // nucleus contains more than one symbol, or whether
 933                         // they are needed for unknown commands like \xx{a}_0
 934                         // or \yy{a}{b}_0. This was done in revision 14819
 935                         // in an unreliable way. See this thread
 936                         // http://www.mail-archive.com/lyx-devel%40lists.lyx.org/msg104917.html
 937                         // for more details.
 938                         // However, we remove empty braces because they look
 939                         // ugly on screen and we are sure that they were added
 940                         // by the write() method (and will be re-added on save).
 941                         if (p->nuc().size() == 1 &&
 942                             p->nuc().back()->asBraceInset() &&
 943                             p->nuc().back()->asBraceInset()->cell(0).empty())
 944                                 p->nuc().erase(0);
 945
 946                         parse(p->cell(p->idxOfScript(up)), FLAG_ITEM, mode);
 947                         if (limits) {
 948                                 p->limits(limits);
 949                                 limits = 0;
 950                         }
 951                 }
 952
 953                 else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
 954                         //lyxerr << "finished reading option" << endl;
 955                         return success_;
 956                 }
 957
 958                 else if (t.cat() == catOther) {
 959                         char_type c = t.character();
 960                         if (isAsciiOrMathAlpha(c)
 961                             || mode_ & Parse::VERBATIM
 962                             || !(mode_ & Parse::USETEXT)
 963                             || mode == InsetMath::TEXT_MODE) {
 964                                 cell->push_back(MathAtom(new InsetMathChar(c)));
 965                         } else {
 966                                 MathAtom at = createInsetMath("text", buf);
 967                                 at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 968                                 while (nextToken().cat() == catOther
 969                                        && !isAsciiOrMathAlpha(nextToken().character())) {
 970                                         c = getToken().character();
 971                                         at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 972                                 }
 973                                 cell->push_back(at);
 974                         }
 975                 }
 976
 977                 else if (t.cat() == catComment) {
 978                         docstring s;
 979                         while (good()) {
 980                                 Token const & t = getToken();
 981                                 if (t.cat() == catNewline)
 982                                         break;
 983                                 s += t.asString();
 984                         }
 985                         cell->push_back(MathAtom(new InsetMathComment(buf, s)));
 986                         skipSpaces();
 987                 }
 988
 989                 //
 990                 // control sequences
 991                 //
 992
 993                 else if (t.cs() == "lyxlock") {
 994                         if (cell->size())
 995                                 cell->back().nucleus()->lock(true);
 996                 }
 997
 998                 else if ((t.cs() == "global" && nextToken().cs() == "def") ||
 999                          t.cs() == "def") {
1000                         if (t.cs() == "global")
1001                                 getToken();
1002
1003                         // get name
1004                         docstring name = getToken().cs();
1005
1006                         // read parameters
1007                         int nargs = 0;
1008                         docstring pars;
1009                         while (good() && nextToken().cat() != catBegin) {
1010                                 pars += getToken().cs();
1011                                 ++nargs;
1012                         }
1013                         nargs /= 2;
1014
1015                         // read definition
1016                         MathData def;
1017                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1018
1019                         // is a version for display attached?
1020                         skipSpaces();
1021                         MathData display;
1022                         if (nextToken().cat() == catBegin)
1023                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1024
1025                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1026                                 name, nargs, 0, MacroTypeDef,
1027                                 vector<MathData>(), def, display)));
1028
1029                         if (buf && (mode_ & Parse::TRACKMACRO))
1030                                 buf->usermacros.insert(name);
1031                 }
1032
1033                 else if (t.cs() == "newcommand" ||
1034                          t.cs() == "renewcommand" ||
1035                          t.cs() == "newlyxcommand") {
1036                         // get name
1037                         if (getToken().cat() != catBegin) {
1038                                 error("'{' in \\newcommand expected (1) ");
1039                                 return success_;
1040                         }
1041                         docstring name = getToken().cs();
1042                         if (getToken().cat() != catEnd) {
1043                                 error("'}' in \\newcommand expected");
1044                                 return success_;
1045                         }
1046
1047                         // get arity
1048                         docstring const arg = getArg('[', ']');
1049                         int nargs = 0;
1050                         if (!arg.empty())
1051                                 nargs = convert<int>(arg);
1052
1053                         // optional argument given?
1054                         skipSpaces();
1055                         int optionals = 0;
1056                         vector<MathData> optionalValues;
1057                         while (nextToken().character() == '[') {
1058                                 getToken();
1059                                 optionalValues.push_back(MathData());
1060                                 parse(optionalValues[optionals], FLAG_BRACK_LAST, mode);
1061                                 ++optionals;
1062                         }
1063
1064                         MathData def;
1065                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1066
1067                         // is a version for display attached?
1068                         skipSpaces();
1069                         MathData display;
1070                         if (nextToken().cat() == catBegin)
1071                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1072
1073                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1074                                 name, nargs, optionals, MacroTypeNewcommand,
1075                                 optionalValues, def, display)));
1076
1077                         if (buf && (mode_ & Parse::TRACKMACRO))
1078                                 buf->usermacros.insert(name);
1079                 }
1080
1081                 else if (t.cs() == "newcommandx" ||
1082                          t.cs() == "renewcommandx") {
1083                         // \newcommandx{\foo}[2][usedefault, addprefix=\global,1=default]{#1,#2}
1084                         // get name
1085                         docstring name;
1086                         if (nextToken().cat() == catBegin) {
1087                                 getToken();
1088                                 name = getToken().cs();
1089                                 if (getToken().cat() != catEnd) {
1090                                         error("'}' in \\newcommandx expected");
1091                                         return success_;
1092                                 }
1093                         } else
1094                                 name = getToken().cs();
1095
1096                         // get arity
1097                         docstring const arg = getArg('[', ']');
1098                         if (arg.empty()) {
1099                                 error("[num] in \\newcommandx expected");
1100                                 return success_;
1101                         }
1102                         int nargs = convert<int>(arg);
1103
1104                         // get options
1105                         int optionals = 0;
1106                         vector<MathData> optionalValues;
1107                         if (nextToken().character() == '[') {
1108                                 // skip '['
1109                                 getToken();
1110
1111                                 // handle 'opt=value' options, separated by ','.
1112                                 skipSpaces();
1113                                 while (nextToken().character() != ']' && good()) {
1114                                         if (nextToken().character() >= '1'
1115                                             && nextToken().character() <= '9') {
1116                                                 // optional value -> get parameter number
1117                                                 int n = getChar() - '0';
1118                                                 if (n > nargs) {
1119                                                         error("Arity of \\newcommandx too low "
1120                                                               "for given optional parameter.");
1121                                                         return success_;
1122                                                 }
1123
1124                                                 // skip '='
1125                                                 if (getToken().character() != '=') {
1126                                                         error("'=' and optional parameter value "
1127                                                               "expected for \\newcommandx");
1128                                                         return success_;
1129                                                 }
1130
1131                                                 // get value
1132                                                 int optNum = max(size_t(n), optionalValues.size());
1133                                                 optionalValues.resize(optNum);
1134                                                 optionalValues[n - 1].clear();
1135                                                 while (nextToken().character() != ']'
1136                                                        && nextToken().character() != ',') {
1137                                                         MathData data;
1138                                                         parse(data, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1139                                                         optionalValues[n - 1].append(data);
1140                                                 }
1141                                                 optionals = max(n, optionals);
1142                                         } else if (nextToken().cat() == catLetter) {
1143                                                 // we in fact ignore every non-optional
1144                                                 // parameter
1145
1146                                                 // get option name
1147                                                 docstring opt;
1148                                                 while (nextToken().cat() == catLetter)
1149                                                         opt += getChar();
1150
1151                                                 // value?
1152                                                 skipSpaces();
1153                                                 MathData value;
1154                                                 if (nextToken().character() == '=') {
1155                                                         getToken();
1156                                                         while (nextToken().character() != ']'
1157                                                                 && nextToken().character() != ',')
1158                                                                 parse(value, FLAG_ITEM,
1159                                                                       InsetMath::UNDECIDED_MODE);
1160                                                 }
1161                                         } else {
1162                                                 error("option for \\newcommandx expected");
1163                                                 return success_;
1164                                         }
1165
1166                                         // skip komma
1167                                         skipSpaces();
1168                                         if (nextToken().character() == ',') {
1169                                                 getChar();
1170                                                 skipSpaces();
1171                                         } else if (nextToken().character() != ']') {
1172                                                 error("Expecting ',' or ']' in options "
1173                                                       "of \\newcommandx");
1174                                                 return success_;
1175                                         }
1176                                 }
1177
1178                                 // skip ']'
1179                                 if (!good())
1180                                         return success_;
1181                                 getToken();
1182                         }
1183
1184                         // get definition
1185                         MathData def;
1186                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1187
1188                         // is a version for display attached?
1189                         skipSpaces();
1190                         MathData display;
1191                         if (nextToken().cat() == catBegin)
1192                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1193
1194                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1195                                 name, nargs, optionals, MacroTypeNewcommandx,
1196                                 optionalValues, def, display)));
1197
1198                         if (buf && (mode_ & Parse::TRACKMACRO))
1199                                 buf->usermacros.insert(name);
1200                 }
1201
1202                 else if (t.cs() == "(") {
1203                         if (mode == InsetMath::MATH_MODE) {
1204                                 error("bad math environment");
1205                                 break;
1206                         }
1207                         cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1208                         parse2(cell->back(), FLAG_SIMPLE2, InsetMath::MATH_MODE, false);
1209                 }
1210
1211                 else if (t.cs() == "[") {
1212                         if (mode != InsetMath::UNDECIDED_MODE) {
1213                                 error("bad math environment");
1214                                 break;
1215                         }
1216                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1217                         parse2(cell->back(), FLAG_EQUATION, InsetMath::MATH_MODE, false);
1218                 }
1219
1220                 else if (t.cs() == "protect")
1221                         // ignore \\protect, will hopefully be re-added during output
1222                         ;
1223
1224                 else if (t.cs() == "end") {
1225                         if (flags & FLAG_END) {
1226                                 // eat environment name
1227                                 docstring const name = getArg('{', '}');
1228                                 if (environments_.empty())
1229                                         error("'found \\end{" + name +
1230                                               "}' without matching '\\begin{" +
1231                                               name + "}'");
1232                                 else if (name != environments_.back())
1233                                         error("'\\end{" + name +
1234                                               "}' does not match '\\begin{" +
1235                                               environments_.back() + "}'");
1236                                 else {
1237                                         environments_.pop_back();
1238                                         // Delete empty last row in matrix
1239                                         // like insets.
1240                                         // If you abuse InsetMathGrid for
1241                                         // non-matrix like structures you
1242                                         // probably need to refine this test.
1243                                         // Right now we only have to test for
1244                                         // single line hull insets.
1245                                         if (grid.nrows() > 1)
1246                                                 delEmptyLastRow(grid);
1247                                         return success_;
1248                                 }
1249                         } else
1250                                 error("found 'end' unexpectedly");
1251                 }
1252
1253                 else if (t.cs() == ")") {
1254                         if (flags & FLAG_SIMPLE2)
1255                                 return success_;
1256                         error("found '\\)' unexpectedly");
1257                 }
1258
1259                 else if (t.cs() == "]") {
1260                         if (flags & FLAG_EQUATION)
1261                                 return success_;
1262                         error("found '\\]' unexpectedly");
1263                 }
1264
1265                 else if (t.cs() == "\\") {
1266                         if (flags & FLAG_ALIGN)
1267                                 return success_;
1268                         bool added = false;
1269                         if (nextToken().asInput() == "*") {
1270                                 getToken();
1271                                 added = addRow(grid, cellrow, docstring(), false);
1272                         } else if (good())
1273                                 added = addRow(grid, cellrow, getArg('[', ']'));
1274                         else
1275                                 error("missing token after \\\\");
1276                         if (added) {
1277                                 cellcol = 0;
1278                                 if (grid.asHullInset())
1279                                         grid.asHullInset()->numbered(
1280                                                         cellrow, numbered);
1281                                 cell = &grid.cell(grid.index(cellrow,
1282                                                              cellcol));
1283                         }
1284                 }
1285
1286 #if 0
1287                 else if (t.cs() == "multicolumn") {
1288                         // extract column count and insert dummy cells
1289                         MathData count;
1290                         parse(count, FLAG_ITEM, mode);
1291                         int cols = 1;
1292                         if (!extractNumber(count, cols)) {
1293                                 success_ = false;
1294                                 lyxerr << " can't extract number of cells from " << count << endl;
1295                         }
1296                         // resize the table if necessary
1297                         for (int i = 0; i < cols; ++i) {
1298                                 if (addCol(grid, cellcol)) {
1299                                         cell = &grid.cell(grid.index(
1300                                                         cellrow, cellcol));
1301                                         // mark this as dummy
1302                                         grid.cellinfo(grid.index(
1303                                                 cellrow, cellcol)).dummy_ = true;
1304                                 }
1305                         }
1306                         // the last cell is the real thing, not a dummy
1307                         grid.cellinfo(grid.index(cellrow, cellcol)).dummy_ = false;
1308
1309                         // read special alignment
1310                         MathData align;
1311                         parse(align, FLAG_ITEM, mode);
1312                         //grid.cellinfo(grid.index(cellrow, cellcol)).align_ = extractString(align);
1313
1314                         // parse the remaining contents into the "real" cell
1315                         parse(*cell, FLAG_ITEM, mode);
1316                 }
1317 #endif
1318
1319                 else if (t.cs() == "limits")
1320                         limits = 1;
1321
1322                 else if (t.cs() == "nolimits")
1323                         limits = -1;
1324
1325                 else if (t.cs() == "nonumber") {
1326                         if (grid.asHullInset())
1327                                 grid.asHullInset()->numbered(cellrow, false);
1328                 }
1329
1330                 else if (t.cs() == "number") {
1331                         if (grid.asHullInset())
1332                                 grid.asHullInset()->numbered(cellrow, true);
1333                 }
1334
1335                 else if (t.cs() == "hline") {
1336                         grid.rowinfo(cellrow).lines_ ++;
1337                 }
1338
1339                 else if (t.cs() == "sqrt") {
1340                         MathData ar;
1341                         parse(ar, FLAG_OPTION, mode);
1342                         if (ar.size()) {
1343                                 cell->push_back(MathAtom(new InsetMathRoot(buf)));
1344                                 cell->back().nucleus()->cell(0) = ar;
1345                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1346                         } else {
1347                                 cell->push_back(MathAtom(new InsetMathSqrt(buf)));
1348                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1349                         }
1350                 }
1351
1352                 else if (t.cs() == "unit") {
1353                         // Allowed formats \unit[val]{unit}
1354                         MathData ar;
1355                         parse(ar, FLAG_OPTION, mode);
1356                         if (ar.size()) {
1357                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT)));
1358                                 cell->back().nucleus()->cell(0) = ar;
1359                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1360                         } else {
1361                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT, 1)));
1362                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1363                         }
1364                 }
1365
1366                 else if (t.cs() == "unitfrac") {
1367                         // Here allowed formats are \unitfrac[val]{num}{denom}
1368                         MathData ar;
1369                         parse(ar, FLAG_OPTION, mode);
1370                         if (ar.size()) {
1371                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC, 3)));
1372                                 cell->back().nucleus()->cell(2) = ar;
1373                         } else {
1374                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC)));
1375                         }
1376                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1377                         parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1378                 }
1379
1380                 else if (t.cs() == "cfrac") {
1381                         // allowed formats are \cfrac[pos]{num}{denom}
1382                         docstring const arg = getArg('[', ']');
1383                         //lyxerr << "got so far: '" << arg << "'" << endl;
1384                                 if (arg == "l")
1385                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT)));
1386                                 else if (arg == "r")
1387                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT)));
1388                                 else if (arg.empty() || arg == "c")
1389                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRAC)));
1390                                 else {
1391                                         error("found invalid optional argument");
1392                                         break;
1393                                 }
1394                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1395                         parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1396                 }
1397
1398                 else if (t.cs() == "xrightarrow" || t.cs() == "xleftarrow") {
1399                         cell->push_back(createInsetMath(t.cs(), buf));
1400                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1401                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1402                 }
1403
1404                 else if (t.cs() == "ref" || t.cs() == "eqref" || t.cs() == "prettyref"
1405                           || t.cs() == "pageref" || t.cs() == "vpageref" || t.cs() == "vref") {
1406                         cell->push_back(MathAtom(new InsetMathRef(buf, t.cs())));
1407                         docstring const opt = parse_verbatim_option();
1408                         docstring const ref = parse_verbatim_item();
1409                         if (!opt.empty()) {
1410                                 cell->back().nucleus()->cell(1).push_back(
1411                                         MathAtom(new InsetMathString(opt)));
1412                         }
1413                         cell->back().nucleus()->cell(0).push_back(
1414                                         MathAtom(new InsetMathString(ref)));
1415                 }
1416
1417                 else if (t.cs() == "left") {
1418                         skipSpaces();
1419                         Token const & tl = getToken();
1420                         // \| and \Vert are equivalent, and InsetMathDelim
1421                         // can't handle \|
1422                         // FIXME: fix this in InsetMathDelim itself!
1423                         docstring const l = tl.cs() == "|" ? from_ascii("Vert") : tl.asString();
1424                         MathData ar;
1425                         parse(ar, FLAG_RIGHT, mode);
1426                         if (!good())
1427                                 break;
1428                         skipSpaces();
1429                         Token const & tr = getToken();
1430                         docstring const r = tr.cs() == "|" ? from_ascii("Vert") : tr.asString();
1431                         cell->push_back(MathAtom(new InsetMathDelim(buf, l, r, ar)));
1432                 }
1433
1434                 else if (t.cs() == "right") {
1435                         if (flags & FLAG_RIGHT)
1436                                 return success_;
1437                         //lyxerr << "got so far: '" << cell << "'" << endl;
1438                         error("Unmatched right delimiter");
1439                         return success_;
1440                 }
1441
1442                 else if (t.cs() == "begin") {
1443                         docstring const name = getArg('{', '}');
1444                         environments_.push_back(name);
1445
1446                         if (name == "array" || name == "subarray") {
1447                                 docstring const valign = parse_verbatim_option() + 'c';
1448                                 docstring const halign = parse_verbatim_item();
1449                                 cell->push_back(MathAtom(new InsetMathArray(buf, name,
1450                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1451                                 parse2(cell->back(), FLAG_END, mode, false);
1452                         }
1453
1454                         else if (name == "tabular") {
1455                                 docstring const valign = parse_verbatim_option() + 'c';
1456                                 docstring const halign = parse_verbatim_item();
1457                                 cell->push_back(MathAtom(new InsetMathTabular(buf, name,
1458                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1459                                 parse2(cell->back(), FLAG_END, InsetMath::TEXT_MODE, false);
1460                         }
1461
1462                         else if (name == "split" || name == "cases") {
1463                                 cell->push_back(createInsetMath(name, buf));
1464                                 parse2(cell->back(), FLAG_END, mode, false);
1465                         }
1466
1467                         else if (name == "alignedat") {
1468                                 docstring const valign = parse_verbatim_option() + 'c';
1469                                 // ignore this for a while
1470                                 getArg('{', '}');
1471                                 cell->push_back(MathAtom(new InsetMathSplit(buf, name, (char)valign[0])));
1472                                 parse2(cell->back(), FLAG_END, mode, false);
1473                         }
1474
1475                         else if (name == "math") {
1476                                 if (mode == InsetMath::MATH_MODE) {
1477                                         error("bad math environment");
1478                                         break;
1479                                 }
1480                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1481                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, true);
1482                         }
1483
1484                         else if (name == "equation" || name == "equation*"
1485                                         || name == "displaymath") {
1486                                 if (mode != InsetMath::UNDECIDED_MODE) {
1487                                         error("bad math environment");
1488                                         break;
1489                                 }
1490                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1491                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, (name == "equation"));
1492                         }
1493
1494                         else if (name == "eqnarray" || name == "eqnarray*") {
1495                                 if (mode != InsetMath::UNDECIDED_MODE) {
1496                                         error("bad math environment");
1497                                         break;
1498                                 }
1499                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEqnArray)));
1500                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1501                         }
1502
1503                         else if (name == "align" || name == "align*") {
1504                                 if (mode != InsetMath::UNDECIDED_MODE) {
1505                                         error("bad math environment");
1506                                         break;
1507                                 }
1508                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlign)));
1509                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1510                         }
1511
1512                         else if (name == "flalign" || name == "flalign*") {
1513                                 if (mode != InsetMath::UNDECIDED_MODE) {
1514                                         error("bad math environment");
1515                                         break;
1516                                 }
1517                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullFlAlign)));
1518                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1519                         }
1520
1521                         else if (name == "alignat" || name == "alignat*") {
1522                                 if (mode != InsetMath::UNDECIDED_MODE) {
1523                                         error("bad math environment");
1524                                         break;
1525                                 }
1526                                 // ignore this for a while
1527                                 getArg('{', '}');
1528                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlignAt)));
1529                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1530                         }
1531
1532                         else if (name == "xalignat" || name == "xalignat*") {
1533                                 if (mode != InsetMath::UNDECIDED_MODE) {
1534                                         error("bad math environment");
1535                                         break;
1536                                 }
1537                                 // ignore this for a while
1538                                 getArg('{', '}');
1539                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXAlignAt)));
1540                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1541                         }
1542
1543                         else if (name == "xxalignat") {
1544                                 if (mode != InsetMath::UNDECIDED_MODE) {
1545                                         error("bad math environment");
1546                                         break;
1547                                 }
1548                                 // ignore this for a while
1549                                 getArg('{', '}');
1550                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXXAlignAt)));
1551                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1552                         }
1553
1554                         else if (name == "multline" || name == "multline*") {
1555                                 if (mode != InsetMath::UNDECIDED_MODE) {
1556                                         error("bad math environment");
1557                                         break;
1558                                 }
1559                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullMultline)));
1560                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1561                         }
1562
1563                         else if (name == "gather" || name == "gather*") {
1564                                 if (mode != InsetMath::UNDECIDED_MODE) {
1565                                         error("bad math environment");
1566                                         break;
1567                                 }
1568                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullGather)));
1569                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1570                         }
1571
1572                         else if (latexkeys const * l = in_word_set(name)) {
1573                                 if (l->inset == "matrix") {
1574                                         cell->push_back(createInsetMath(name, buf));
1575                                         parse2(cell->back(), FLAG_END, mode, false);
1576                                 } else if (l->inset == "split") {
1577                                         docstring const valign = parse_verbatim_option() + 'c';
1578                                         cell->push_back(MathAtom(
1579                                                 new InsetMathSplit(buf, name, (char)valign[0])));
1580                                         parse2(cell->back(), FLAG_END, mode, false);
1581                                 } else {
1582                                         success_ = false;
1583                                         if (!(mode_ & Parse::QUIET)) {
1584                                                 dump();
1585                                                 lyxerr << "found math environment `"
1586                                                        << to_utf8(name)
1587                                                        << "' in symbols file with unsupported inset `"
1588                                                        << to_utf8(l->inset)
1589                                                        << "'." << endl;
1590                                         }
1591                                         // create generic environment inset
1592                                         cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1593                                         parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1594                                 }
1595                         }
1596
1597                         else {
1598                                 success_ = false;
1599                                 if (!(mode_ & Parse::QUIET)) {
1600                                         dump();
1601                                         lyxerr << "found unknown math environment '"
1602                                                << to_utf8(name) << "'" << endl;
1603                                 }
1604                                 // create generic environment inset
1605                                 cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1606                                 parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1607                         }
1608                 }
1609
1610                 else if (t.cs() == "kern") {
1611                         // FIXME: A hack...
1612                         docstring s;
1613                         int num_tokens = 0;
1614                         while (true) {
1615                                 Token const & t = getToken();
1616                                 ++num_tokens;
1617                                 if (!good()) {
1618                                         s.clear();
1619                                         while (num_tokens--)
1620                                                 putback();
1621                                         break;
1622                                 }
1623                                 s += t.character();
1624                                 if (isValidLength(to_utf8(s)))
1625                                         break;
1626                         }
1627                         if (s.empty())
1628                                 cell->push_back(MathAtom(new InsetMathKern));
1629                         else
1630                                 cell->push_back(MathAtom(new InsetMathKern(s)));
1631                 }
1632
1633                 else if (t.cs() == "label") {
1634                         // FIXME: This is swallowed in inline formulas
1635                         docstring label = parse_verbatim_item();
1636                         MathData ar;
1637                         asArray(label, ar);
1638                         if (grid.asHullInset()) {
1639                                 grid.asHullInset()->label(cellrow, label);
1640                         } else {
1641                                 cell->push_back(createInsetMath(t.cs(), buf));
1642                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
1643                         }
1644                 }
1645
1646                 else if (t.cs() == "choose" || t.cs() == "over"
1647                                 || t.cs() == "atop" || t.cs() == "brace"
1648                                 || t.cs() == "brack") {
1649                         MathAtom at = createInsetMath(t.cs(), buf);
1650                         at.nucleus()->cell(0) = *cell;
1651                         cell->clear();
1652                         parse(at.nucleus()->cell(1), flags, mode);
1653                         cell->push_back(at);
1654                         return success_;
1655                 }
1656
1657                 else if (t.cs() == "color") {
1658                         docstring const color = parse_verbatim_item();
1659                         cell->push_back(MathAtom(new InsetMathColor(buf, true, color)));
1660                         parse(cell->back().nucleus()->cell(0), flags, mode);
1661                         return success_;
1662                 }
1663
1664                 else if (t.cs() == "textcolor") {
1665                         docstring const color = parse_verbatim_item();
1666                         cell->push_back(MathAtom(new InsetMathColor(buf, false, color)));
1667                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1668                 }
1669
1670                 else if (t.cs() == "normalcolor") {
1671                         cell->push_back(createInsetMath(t.cs(), buf));
1672                         parse(cell->back().nucleus()->cell(0), flags, mode);
1673                         return success_;
1674                 }
1675
1676                 else if (t.cs() == "substack") {
1677                         cell->push_back(createInsetMath(t.cs(), buf));
1678                         parse2(cell->back(), FLAG_ITEM, mode, false);
1679                 }
1680
1681                 else if (t.cs() == "xymatrix") {
1682                         odocstringstream os;
1683                         while (good() && nextToken().cat() != catBegin)
1684                                 os << getToken().asInput();
1685                         cell->push_back(createInsetMath(t.cs() + os.str(), buf));
1686                         parse2(cell->back(), FLAG_ITEM, mode, false);
1687                 }
1688
1689                 else if (t.cs() == "framebox" || t.cs() == "makebox") {
1690                         cell->push_back(createInsetMath(t.cs(), buf));
1691                         parse(cell->back().nucleus()->cell(0), FLAG_OPTION, InsetMath::TEXT_MODE);
1692                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, InsetMath::TEXT_MODE);
1693                         parse(cell->back().nucleus()->cell(2), FLAG_ITEM, InsetMath::TEXT_MODE);
1694                 }
1695
1696                 else if (t.cs() == "tag") {
1697                         if (nextToken().character() == '*') {
1698                                 getToken();
1699                                 cell->push_back(createInsetMath(t.cs() + '*', buf));
1700                         } else
1701                                 cell->push_back(createInsetMath(t.cs(), buf));
1702                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1703                 }
1704
1705                 else if (t.cs() == "hspace" && nextToken().character() != '*') {
1706                         docstring const name = t.cs();
1707                         docstring const arg = parse_verbatim_item();
1708                         Length length;
1709                         if (isValidLength(to_utf8(arg), &length))
1710                                 cell->push_back(MathAtom(new InsetMathSpace(length)));
1711                         else {
1712                                 // Since the Length class cannot use length variables
1713                                 // we must not create an InsetMathSpace.
1714                                 cell->push_back(MathAtom(new MathMacro(buf, name)));
1715                                 MathData ar;
1716                                 mathed_parse_cell(ar, '{' + arg + '}', mode_);
1717                                 cell->append(ar);
1718                         }
1719                 }
1720
1721 #if 0
1722                 else if (t.cs() == "infer") {
1723                         MathData ar;
1724                         parse(ar, FLAG_OPTION, mode);
1725                         cell->push_back(createInsetMath(t.cs(), buf));
1726                         parse2(cell->back(), FLAG_ITEM, mode, false);
1727                 }
1728
1729                 // Disabled
1730                 else if (1 && t.cs() == "ar") {
1731                         auto_ptr<InsetMathXYArrow> p(new InsetMathXYArrow);
1732                         // try to read target
1733                         parse(p->cell(0), FLAG_OTPTION, mode);
1734                         // try to read label
1735                         if (nextToken().cat() == catSuper || nextToken().cat() == catSub) {
1736                                 p->up_ = nextToken().cat() == catSuper;
1737                                 getToken();
1738                                 parse(p->cell(1), FLAG_ITEM, mode);
1739                                 //lyxerr << "read label: " << p->cell(1) << endl;
1740                         }
1741
1742                         cell->push_back(MathAtom(p.release()));
1743                         //lyxerr << "read cell: " << cell << endl;
1744                 }
1745 #endif
1746
1747                 else if (t.cs() == "lyxmathsym") {
1748                         skipSpaces();
1749                         if (getToken().cat() != catBegin) {
1750                                 error("'{' expected in \\" + t.cs());
1751                                 return success_;
1752                         }
1753                         int count = 0;
1754                         docstring cmd;
1755                         CatCode cat = nextToken().cat();
1756                         while (good() && (count || cat != catEnd)) {
1757                                 if (cat == catBegin)
1758                                         ++count;
1759                                 else if (cat == catEnd)
1760                                         --count;
1761                                 cmd += getToken().asInput();
1762                                 cat = nextToken().cat();
1763                         }
1764                         if (getToken().cat() != catEnd) {
1765                                 error("'}' expected in \\" + t.cs());
1766                                 return success_;
1767                         }
1768                         docstring rem;
1769                         do {
1770                                 cmd = Encodings::fromLaTeXCommand(cmd, rem);
1771                                 for (size_t i = 0; i < cmd.size(); ++i)
1772                                         cell->push_back(MathAtom(new InsetMathChar(cmd[i])));
1773                                 if (rem.size()) {
1774                                         char_type c = rem[0];
1775                                         cell->push_back(MathAtom(new InsetMathChar(c)));
1776                                         cmd = rem.substr(1);
1777                                         rem.clear();
1778                                 } else
1779                                         cmd.clear();
1780                         } while (cmd.size());
1781                 }
1782
1783                 else if (t.cs().size()) {
1784                         bool const no_mhchem =
1785                                 (t.cs() == "ce" || t.cs() == "cf") && buf
1786                                 && buf->params().use_mhchem == BufferParams::package_off;
1787                         bool const is_user_macro = no_mhchem ||
1788                                 (buf && (mode_ & Parse::TRACKMACRO
1789                                         ? buf->usermacros.count(t.cs()) != 0
1790                                         : buf->getMacro(t.cs(), false) != 0));
1791                         latexkeys const * l = in_word_set(t.cs());
1792                         if (l && !is_user_macro) {
1793                                 if (l->inset == "big") {
1794                                         skipSpaces();
1795                                         docstring const delim = getToken().asInput();
1796                                         if (InsetMathBig::isBigInsetDelim(delim))
1797                                                 cell->push_back(MathAtom(
1798                                                         new InsetMathBig(t.cs(), delim)));
1799                                         else {
1800                                                 cell->push_back(createInsetMath(t.cs(), buf));
1801                                                 putback();
1802                                         }
1803                                 }
1804
1805                                 else if (l->inset == "font") {
1806                                         cell->push_back(createInsetMath(t.cs(), buf));
1807                                         parse(cell->back().nucleus()->cell(0),
1808                                                 FLAG_ITEM, asMode(mode, l->extra));
1809                                 }
1810
1811                                 else if (l->inset == "oldfont") {
1812                                         cell->push_back(createInsetMath(t.cs(), buf));
1813                                         parse(cell->back().nucleus()->cell(0),
1814                                                 flags | FLAG_ALIGN, asMode(mode, l->extra));
1815                                         if (prevToken().cat() != catAlign &&
1816                                             prevToken().cs() != "\\")
1817                                                 return success_;
1818                                         putback();
1819                                 }
1820
1821                                 else if (l->inset == "style") {
1822                                         cell->push_back(createInsetMath(t.cs(), buf));
1823                                         parse(cell->back().nucleus()->cell(0),
1824                                                 flags | FLAG_ALIGN, mode);
1825                                         if (prevToken().cat() != catAlign &&
1826                                             prevToken().cs() != "\\")
1827                                                 return success_;
1828                                         putback();
1829                                 }
1830
1831                                 else {
1832                                         MathAtom at = createInsetMath(t.cs(), buf);
1833                                         for (InsetMath::idx_type i = 0; i < at->nargs(); ++i)
1834                                                 parse(at.nucleus()->cell(i),
1835                                                         FLAG_ITEM, asMode(mode, l->extra));
1836                                         cell->push_back(at);
1837                                 }
1838                         }
1839
1840                         else {
1841                                 bool is_unicode_symbol = false;
1842                                 if (mode == InsetMath::TEXT_MODE && !is_user_macro) {
1843                                         int num_tokens = 0;
1844                                         docstring cmd = prevToken().asInput();
1845                                         CatCode cat = nextToken().cat();
1846                                         if (cat == catBegin) {
1847                                                 int count = 0;
1848                                                 while (good() && (count || cat != catEnd)) {
1849                                                         cat = nextToken().cat();
1850                                                         cmd += getToken().asInput();
1851                                                         ++num_tokens;
1852                                                         if (cat == catBegin)
1853                                                                 ++count;
1854                                                         else if (cat == catEnd)
1855                                                                 --count;
1856                                                 }
1857                                         }
1858                                         bool is_combining;
1859                                         char_type c =
1860                                                 Encodings::fromLaTeXCommand(cmd, is_combining);
1861                                         if (is_combining) {
1862                                                 if (cat == catLetter)
1863                                                         cmd += '{';
1864                                                 cmd += getToken().asInput();
1865                                                 ++num_tokens;
1866                                                 if (cat == catLetter)
1867                                                         cmd += '}';
1868                                                 c = Encodings::fromLaTeXCommand(cmd, is_combining);
1869                                         }
1870                                         if (c) {
1871                                                 is_unicode_symbol = true;
1872                                                 cell->push_back(MathAtom(new InsetMathChar(c)));
1873                                         } else {
1874                                                 while (num_tokens--)
1875                                                         putback();
1876                                         }
1877                                 }
1878                                 if (!is_unicode_symbol) {
1879                                         MathAtom at = is_user_macro ?
1880                                                 MathAtom(new MathMacro(buf, t.cs()))
1881                                                 : createInsetMath(t.cs(), buf);
1882                                         InsetMath::mode_type m = mode;
1883                                         //if (m == InsetMath::UNDECIDED_MODE)
1884                                         //lyxerr << "default creation: m1: " << m << endl;
1885                                         if (at->currentMode() != InsetMath::UNDECIDED_MODE)
1886                                                 m = at->currentMode();
1887                                         //lyxerr << "default creation: m2: " << m << endl;
1888                                         InsetMath::idx_type start = 0;
1889                                         // this fails on \bigg[...\bigg]
1890                                         //MathData opt;
1891                                         //parse(opt, FLAG_OPTION, InsetMath::VERBATIM_MODE);
1892                                         //if (opt.size()) {
1893                                         //      start = 1;
1894                                         //      at.nucleus()->cell(0) = opt;
1895                                         //}
1896                                         for (InsetMath::idx_type i = start; i < at->nargs(); ++i) {
1897                                                 parse(at.nucleus()->cell(i), FLAG_ITEM, m);
1898                                                 skipSpaces();
1899                                         }
1900                                         cell->push_back(at);
1901                                 }
1902                         }
1903                 }
1904
1905
1906                 if (flags & FLAG_LEAVE) {
1907                         flags &= ~FLAG_LEAVE;
1908                         break;
1909                 }
1910         }
1911         return success_;
1912 }
1913
1914
1915
1916 } // anonymous namespace
1917
1918
1919 bool mathed_parse_cell(MathData & ar, docstring const & str, Parse::flags f)
1920 {
1921         return Parser(str, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1922                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1923 }
1924
1925
1926 bool mathed_parse_cell(MathData & ar, istream & is, Parse::flags f)
1927 {
1928         return Parser(is, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1929                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1930 }
1931
1932
1933 bool mathed_parse_normal(Buffer * buf, MathAtom & t, docstring const & str,
1934                          Parse::flags f)
1935 {
1936         return Parser(str, f, buf).parse(t);
1937 }
1938
1939
1940 bool mathed_parse_normal(Buffer * buf, MathAtom & t, Lexer & lex,
1941                          Parse::flags f)
1942 {
1943         return Parser(lex, f, buf).parse(t);
1944 }
1945
1946
1947 bool mathed_parse_normal(InsetMathGrid & grid, docstring const & str,
1948                          Parse::flags f)
1949 {
1950         return Parser(str, f, &grid.buffer()).parse1(grid, 0, f & Parse::TEXTMODE ?
1951                         InsetMath::TEXT_MODE : InsetMath::MATH_MODE, false);
1952 }
1953
1954
1955 void initParser()
1956 {
1957         fill(theCatcode, theCatcode + 128, catOther);
1958         fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
1959         fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
1960
1961         theCatcode[int('\\')] = catEscape;
1962         theCatcode[int('{')]  = catBegin;
1963         theCatcode[int('}')]  = catEnd;
1964         theCatcode[int('$')]  = catMath;
1965         theCatcode[int('&')]  = catAlign;
1966         theCatcode[int('\n')] = catNewline;
1967         theCatcode[int('#')]  = catParameter;
1968         theCatcode[int('^')]  = catSuper;
1969         theCatcode[int('_')]  = catSub;
1970         theCatcode[int(0x7f)] = catIgnore;
1971         theCatcode[int(' ')]  = catSpace;
1972         theCatcode[int('\t')] = catSpace;
1973         theCatcode[int('\r')] = catNewline;
1974         theCatcode[int('~')]  = catActive;
1975         theCatcode[int('%')]  = catComment;
1976 }
1977
1978
1979 } // namespace lyx