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 whether 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  * Note that this is only needed for inner-hull grid types, such as array
 229  * or aligned, but not for outer-hull grid types, such as eqnarray or align.
 230  */
 231 void delEmptyLastRow(InsetMathGrid & grid)
 232 {
 233         InsetMathGrid::row_type const row = grid.nrows() - 1;
 234         for (InsetMathGrid::col_type col = 0; col < grid.ncols(); ++col) {
 235                 if (!grid.cell(grid.index(row, col)).empty())
 236                         return;
 237         }
 238         // Copy the row information of the empty row (which would contain the
 239         // last hline in the example above) to the dummy row and delete the
 240         // empty row.
 241         grid.rowinfo(row + 1) = grid.rowinfo(row);
 242         grid.delRow(row);
 243 }
 244
 245
 246 /*!
 247  * Tell whether the environment name corresponds to an inner-hull grid type.
 248  */
 249 bool innerHull(docstring const & name)
 250 {
 251         return name == "array" || name == "cases" || name == "aligned"
 252                 || name == "alignedat" || name == "gathered" || name == "split";
 253 }
 254
 255
 256 // These are TeX's catcodes
 257 enum CatCode {
 258         catEscape,     // 0    backslash
 259         catBegin,      // 1    {
 260         catEnd,        // 2    }
 261         catMath,       // 3    $
 262         catAlign,      // 4    &
 263         catNewline,    // 5    ^^M
 264         catParameter,  // 6    #
 265         catSuper,      // 7    ^
 266         catSub,        // 8    _
 267         catIgnore,     // 9
 268         catSpace,      // 10   space
 269         catLetter,     // 11   a-zA-Z
 270         catOther,      // 12   none of the above
 271         catActive,     // 13   ~
 272         catComment,    // 14   %
 273         catInvalid     // 15   <delete>
 274 };
 275
 276 CatCode theCatcode[128];
 277
 278
 279 inline CatCode catcode(char_type c)
 280 {
 281         /* The only characters that are not catOther lie in the pure ASCII
 282          * range. Therefore theCatcode has only 128 entries.
 283          * TeX itself deals with 8bit characters, so if needed this table
 284          * could be enlarged to 256 entries.
 285          * Any larger value does not make sense, since the fact that we use
 286          * unicode internally does not change Knuth's TeX engine.
 287          * Apart from that a table for the full 21bit UCS4 range would waste
 288          * too much memory. */
 289         if (c >= 128)
 290                 return catOther;
 291
 292         return theCatcode[c];
 293 }
 294
 295
 296 enum {
 297         FLAG_ALIGN      = 1 << 0,  //  next & or \\ ends the parsing process
 298         FLAG_BRACE_LAST = 1 << 1,  //  next closing brace ends the parsing
 299         FLAG_RIGHT      = 1 << 2,  //  next \\right ends the parsing process
 300         FLAG_END        = 1 << 3,  //  next \\end ends the parsing process
 301         FLAG_BRACK_LAST = 1 << 4,  //  next closing bracket ends the parsing
 302         FLAG_TEXTMODE   = 1 << 5,  //  we are in a box
 303         FLAG_ITEM       = 1 << 6,  //  read a (possibly braced) token
 304         FLAG_LEAVE      = 1 << 7,  //  leave the loop at the end
 305         FLAG_SIMPLE     = 1 << 8,  //  next $ leaves the loop
 306         FLAG_EQUATION   = 1 << 9,  //  next \] leaves the loop
 307         FLAG_SIMPLE2    = 1 << 10, //  next \) leaves the loop
 308         FLAG_OPTION     = 1 << 11, //  read [...] style option
 309         FLAG_BRACED     = 1 << 12  //  read {...} style argument
 310 };
 311
 312
 313 //
 314 // Helper class for parsing
 315 //
 316
 317 class Token {
 318 public:
 319         ///
 320         Token() : cs_(), char_(0), cat_(catIgnore) {}
 321         ///
 322         Token(char_type c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
 323         ///
 324         explicit Token(docstring const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
 325
 326         ///
 327         docstring const & cs() const { return cs_; }
 328         ///
 329         CatCode cat() const { return cat_; }
 330         ///
 331         char_type character() const { return char_; }
 332         ///
 333         docstring asString() const { return cs_.size() ? cs_ : docstring(1, char_); }
 334         ///
 335         docstring asInput() const { return cs_.size() ? '\\' + cs_ : docstring(1, char_); }
 336
 337 private:
 338         ///
 339         docstring cs_;
 340         ///
 341         char_type char_;
 342         ///
 343         CatCode cat_;
 344 };
 345
 346
 347 ostream & operator<<(ostream & os, Token const & t)
 348 {
 349         if (t.cs().size()) {
 350                 docstring const & cs = t.cs();
 351                 // FIXME: For some strange reason, the stream operator instanciate
 352                 // a new Token before outputting the contents of t.cs().
 353                 // Because of this the line
 354                 //     os << '\\' << cs;
 355                 // below becomes recursive.
 356                 // In order to avoid that we return early:
 357                 if (cs == "\\")
 358                         return os;
 359                 os << '\\' << to_utf8(cs);
 360         }
 361         else if (t.cat() == catLetter)
 362                 os << t.character();
 363         else
 364                 os << '[' << t.character() << ',' << t.cat() << ']';
 365         return os;
 366 }
 367
 368
 369 class Parser {
 370 public:
 371         ///
 372         typedef  InsetMath::mode_type mode_type;
 373         ///
 374         typedef  Parse::flags parse_mode;
 375
 376         ///
 377         Parser(Lexer & lex, parse_mode mode, Buffer * buf);
 378         /// Only use this for reading from .lyx file format, for the reason
 379         /// see Parser::tokenize(istream &).
 380         Parser(istream & is, parse_mode mode, Buffer * buf);
 381         ///
 382         Parser(docstring const & str, parse_mode mode, Buffer * buf);
 383
 384         ///
 385         bool parse(MathAtom & at);
 386         ///
 387         bool parse(MathData & array, unsigned flags, mode_type mode);
 388         ///
 389         bool parse1(InsetMathGrid & grid, unsigned flags, mode_type mode,
 390                 bool numbered);
 391         ///
 392         MathData parse(unsigned flags, mode_type mode);
 393         ///
 394         int lineno() const { return lineno_; }
 395         ///
 396         void putback();
 397
 398 private:
 399         ///
 400         void parse2(MathAtom & at, unsigned flags, mode_type mode, bool numbered);
 401         /// get arg delimited by 'left' and 'right'
 402         docstring getArg(char_type left, char_type right);
 403         ///
 404         char_type getChar();
 405         ///
 406         void error(string const & msg);
 407         void error(docstring const & msg) { error(to_utf8(msg)); }
 408         /// dump contents to screen
 409         void dump() const;
 410         /// Only use this for reading from .lyx file format (see
 411         /// implementation for reason)
 412         void tokenize(istream & is);
 413         ///
 414         void tokenize(docstring const & s);
 415         ///
 416         void skipSpaceTokens(idocstream & is, char_type c);
 417         ///
 418         void push_back(Token const & t);
 419         ///
 420         void pop_back();
 421         ///
 422         Token const & prevToken() const;
 423         ///
 424         Token const & nextToken() const;
 425         ///
 426         Token const & getToken();
 427         /// skips spaces if any
 428         void skipSpaces();
 429         ///
 430         void lex(docstring const & s);
 431         ///
 432         bool good() const;
 433         ///
 434         docstring parse_verbatim_item();
 435         ///
 436         docstring parse_verbatim_option();
 437
 438         ///
 439         int lineno_;
 440         ///
 441         vector<Token> tokens_;
 442         ///
 443         unsigned pos_;
 444         /// Stack of active environments
 445         vector<docstring> environments_;
 446         ///
 447         parse_mode mode_;
 448         ///
 449         bool success_;
 450         ///
 451         Buffer * buffer_;
 452 };
 453
 454
 455 Parser::Parser(Lexer & lexer, parse_mode mode, Buffer * buf)
 456         : lineno_(lexer.lineNumber()), pos_(0), mode_(mode), success_(true),
 457           buffer_(buf)
 458 {
 459         tokenize(lexer.getStream());
 460         lexer.eatLine();
 461 }
 462
 463
 464 Parser::Parser(istream & is, parse_mode mode, Buffer * buf)
 465         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 466 {
 467         tokenize(is);
 468 }
 469
 470
 471 Parser::Parser(docstring const & str, parse_mode mode, Buffer * buf)
 472         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 473 {
 474         tokenize(str);
 475 }
 476
 477
 478 void Parser::push_back(Token const & t)
 479 {
 480         tokens_.push_back(t);
 481 }
 482
 483
 484 void Parser::pop_back()
 485 {
 486         tokens_.pop_back();
 487 }
 488
 489
 490 Token const & Parser::prevToken() const
 491 {
 492         static const Token dummy;
 493         return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
 494 }
 495
 496
 497 Token const & Parser::nextToken() const
 498 {
 499         static const Token dummy;
 500         return good() ? tokens_[pos_] : dummy;
 501 }
 502
 503
 504 Token const & Parser::getToken()
 505 {
 506         static const Token dummy;
 507         //lyxerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << endl;
 508         return good() ? tokens_[pos_++] : dummy;
 509 }
 510
 511
 512 void Parser::skipSpaces()
 513 {
 514         while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
 515                 getToken();
 516 }
 517
 518
 519 void Parser::putback()
 520 {
 521         --pos_;
 522 }
 523
 524
 525 bool Parser::good() const
 526 {
 527         return pos_ < tokens_.size();
 528 }
 529
 530
 531 char_type Parser::getChar()
 532 {
 533         if (!good()) {
 534                 error("The input stream is not well...");
 535                 putback();
 536                 return 0;
 537         }
 538         return tokens_[pos_++].character();
 539 }
 540
 541
 542 docstring Parser::getArg(char_type left, char_type right)
 543 {
 544         skipSpaces();
 545
 546         docstring result;
 547         char_type c = getChar();
 548
 549         if (c != left)
 550                 putback();
 551         else
 552                 while ((c = getChar()) != right && good())
 553                         result += c;
 554
 555         return result;
 556 }
 557
 558
 559 void Parser::skipSpaceTokens(idocstream & is, char_type c)
 560 {
 561         // skip trailing spaces
 562         while (catcode(c) == catSpace || catcode(c) == catNewline)
 563                 if (!is.get(c))
 564                         break;
 565         //lyxerr << "putting back: " << c << endl;
 566         is.putback(c);
 567 }
 568
 569
 570 void Parser::tokenize(istream & is)
 571 {
 572         // eat everything up to the next \end_inset or end of stream
 573         // and store it in s for further tokenization
 574         string s;
 575         char c;
 576         while (is.get(c)) {
 577                 s += c;
 578                 if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
 579                         s = s.substr(0, s.size() - 10);
 580                         break;
 581                 }
 582         }
 583         // Remove the space after \end_inset
 584         if (is.get(c) && c != ' ')
 585                 is.unget();
 586
 587         // tokenize buffer
 588         tokenize(from_utf8(s));
 589 }
 590
 591
 592 void Parser::tokenize(docstring const & buffer)
 593 {
 594         idocstringstream is(mode_ & Parse::VERBATIM
 595                         ? escapeSpecialChars(buffer, mode_ & Parse::TEXTMODE)
 596                         : buffer, ios::in | ios::binary);
 597
 598         char_type c;
 599         while (is.get(c)) {
 600                 //lyxerr << "reading c: " << c << endl;
 601
 602                 switch (catcode(c)) {
 603                         case catNewline: {
 604                                 ++lineno_;
 605                                 is.get(c);
 606                                 if (catcode(c) == catNewline)
 607                                         ; //push_back(Token("par"));
 608                                 else {
 609                                         push_back(Token('\n', catNewline));
 610                                         is.putback(c);
 611                                 }
 612                                 break;
 613                         }
 614
 615 /*
 616                         case catComment: {
 617                                 while (is.get(c) && catcode(c) != catNewline)
 618                                         ;
 619                                 ++lineno_;
 620                                 break;
 621                         }
 622 */
 623
 624                         case catEscape: {
 625                                 is.get(c);
 626                                 if (!is) {
 627                                         error("unexpected end of input");
 628                                 } else {
 629                                         if (c == '\n')
 630                                                 c = ' ';
 631                                         docstring s(1, c);
 632                                         if (catcode(c) == catLetter) {
 633                                                 // collect letters
 634                                                 while (is.get(c) && catcode(c) == catLetter)
 635                                                         s += c;
 636                                                 skipSpaceTokens(is, c);
 637                                         }
 638                                         push_back(Token(s));
 639                                 }
 640                                 break;
 641                         }
 642
 643                         case catSuper:
 644                         case catSub: {
 645                                 push_back(Token(c, catcode(c)));
 646                                 is.get(c);
 647                                 skipSpaceTokens(is, c);
 648                                 break;
 649                         }
 650
 651                         case catIgnore: {
 652                                 if (!(mode_ & Parse::QUIET))
 653                                         lyxerr << "ignoring a char: " << int(c) << endl;
 654                                 break;
 655                         }
 656
 657                         default:
 658                                 push_back(Token(c, catcode(c)));
 659                 }
 660         }
 661
 662 #ifdef FILEDEBUG
 663         dump();
 664 #endif
 665 }
 666
 667
 668 void Parser::dump() const
 669 {
 670         lyxerr << "\nTokens: ";
 671         for (unsigned i = 0; i < tokens_.size(); ++i) {
 672                 if (i == pos_)
 673                         lyxerr << " <#> ";
 674                 lyxerr << tokens_[i];
 675         }
 676         lyxerr << " pos: " << pos_ << endl;
 677 }
 678
 679
 680 void Parser::error(string const & msg)
 681 {
 682         success_ = false;
 683         if (!(mode_ & Parse::QUIET)) {
 684                 lyxerr << "Line ~" << lineno_ << ": Math parse error: "
 685                        << msg << endl;
 686                 dump();
 687         }
 688 }
 689
 690
 691 bool Parser::parse(MathAtom & at)
 692 {
 693         skipSpaces();
 694         MathData ar(buffer_);
 695         parse(ar, false, InsetMath::UNDECIDED_MODE);
 696         if (ar.size() != 1 || ar.front()->getType() == hullNone) {
 697                 if (!(mode_ & Parse::QUIET))
 698                         lyxerr << "unusual contents found: " << ar << endl;
 699                 at = MathAtom(new InsetMathPar(buffer_, ar));
 700                 //if (at->nargs() > 0)
 701                 //      at.nucleus()->cell(0) = ar;
 702                 //else
 703                 //      lyxerr << "unusual contents found: " << ar << endl;
 704                 success_ = false;
 705         } else
 706                 at = ar[0];
 707         return success_;
 708 }
 709
 710
 711 docstring Parser::parse_verbatim_option()
 712 {
 713         skipSpaces();
 714         docstring res;
 715         if (nextToken().character() == '[') {
 716                 Token t = getToken();
 717                 for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
 718                         if (t.cat() == catBegin) {
 719                                 putback();
 720                                 res += '{' + parse_verbatim_item() + '}';
 721                         } else
 722                                 res += t.asInput();
 723                 }
 724         }
 725         return res;
 726 }
 727
 728
 729 docstring Parser::parse_verbatim_item()
 730 {
 731         skipSpaces();
 732         docstring res;
 733         if (nextToken().cat() == catBegin) {
 734                 Token t = getToken();
 735                 for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
 736                         if (t.cat() == catBegin) {
 737                                 putback();
 738                                 res += '{' + parse_verbatim_item() + '}';
 739                         }
 740                         else
 741                                 res += t.asInput();
 742                 }
 743         }
 744         return res;
 745 }
 746
 747
 748 MathData Parser::parse(unsigned flags, mode_type mode)
 749 {
 750         MathData ar(buffer_);
 751         parse(ar, flags, mode);
 752         return ar;
 753 }
 754
 755
 756 bool Parser::parse(MathData & array, unsigned flags, mode_type mode)
 757 {
 758         InsetMathGrid grid(buffer_, 1, 1);
 759         parse1(grid, flags, mode, false);
 760         array = grid.cell(0);
 761         return success_;
 762 }
 763
 764
 765 void Parser::parse2(MathAtom & at, const unsigned flags, const mode_type mode,
 766         const bool numbered)
 767 {
 768         parse1(*(at.nucleus()->asGridInset()), flags, mode, numbered);
 769 }
 770
 771
 772 bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
 773         const mode_type mode, const bool numbered)
 774 {
 775         int limits = 0;
 776         InsetMathGrid::row_type cellrow = 0;
 777         InsetMathGrid::col_type cellcol = 0;
 778         MathData * cell = &grid.cell(grid.index(cellrow, cellcol));
 779         Buffer * buf = buffer_;
 780
 781         if (grid.asHullInset())
 782                 grid.asHullInset()->numbered(cellrow, numbered);
 783
 784         //dump();
 785         //lyxerr << " flags: " << flags << endl;
 786         //lyxerr << " mode: " << mode  << endl;
 787         //lyxerr << "grid: " << grid << endl;
 788
 789         while (good()) {
 790                 Token const & t = getToken();
 791
 792 #ifdef FILEDEBUG
 793                 lyxerr << "t: " << t << " flags: " << flags << endl;
 794                 lyxerr << "mode: " << mode  << endl;
 795                 cell->dump();
 796                 lyxerr << endl;
 797 #endif
 798
 799                 if (flags & FLAG_ITEM) {
 800
 801                         if (t.cat() == catBegin) {
 802                                 // skip the brace and collect everything to the next matching
 803                                 // closing brace
 804                                 parse1(grid, FLAG_BRACE_LAST, mode, numbered);
 805                                 return success_;
 806                         }
 807
 808                         // handle only this single token, leave the loop if done
 809                         flags = FLAG_LEAVE;
 810                 }
 811
 812
 813                 if (flags & FLAG_BRACED) {
 814                         if (t.cat() == catSpace)
 815                                 continue;
 816
 817                         if (t.cat() != catBegin) {
 818                                 error("opening brace expected");
 819                                 return success_;
 820                         }
 821
 822                         // skip the brace and collect everything to the next matching
 823                         // closing brace
 824                         flags = FLAG_BRACE_LAST;
 825                 }
 826
 827
 828                 if (flags & FLAG_OPTION) {
 829                         if (t.cat() == catOther && t.character() == '[') {
 830                                 MathData ar;
 831                                 parse(ar, FLAG_BRACK_LAST, mode);
 832                                 cell->append(ar);
 833                         } else {
 834                                 // no option found, put back token and we are done
 835                                 putback();
 836                         }
 837                         return success_;
 838                 }
 839
 840                 //
 841                 // cat codes
 842                 //
 843                 if (t.cat() == catMath) {
 844                         if (mode != InsetMath::MATH_MODE) {
 845                                 // we are inside some text mode thingy, so opening new math is allowed
 846                                 Token const & n = getToken();
 847                                 if (n.cat() == catMath) {
 848                                         // TeX's $$...$$ syntax for displayed math
 849                                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
 850                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 851                                         getToken(); // skip the second '$' token
 852                                 } else {
 853                                         // simple $...$  stuff
 854                                         putback();
 855                                         if (mode == InsetMath::UNDECIDED_MODE) {
 856                                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
 857                                                 parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 858                                         } else {
 859                                                 // Don't create nested math hulls (bug #5392)
 860                                                 cell->push_back(MathAtom(new InsetMathEnsureMath(buf)));
 861                                                 parse(cell->back().nucleus()->cell(0), FLAG_SIMPLE, InsetMath::MATH_MODE);
 862                                         }
 863                                 }
 864                         }
 865
 866                         else if (flags & FLAG_SIMPLE) {
 867                                 // this is the end of the formula
 868                                 return success_;
 869                         }
 870
 871                         else {
 872                                 error("something strange in the parser");
 873                                 break;
 874                         }
 875                 }
 876
 877                 else if (t.cat() == catLetter)
 878                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 879
 880                 else if (t.cat() == catSpace && mode != InsetMath::MATH_MODE) {
 881                         if (cell->empty() || cell->back()->getChar() != ' ')
 882                                 cell->push_back(MathAtom(new InsetMathChar(t.character())));
 883                 }
 884
 885                 else if (t.cat() == catNewline && mode != InsetMath::MATH_MODE) {
 886                         if (cell->empty() || cell->back()->getChar() != ' ')
 887                                 cell->push_back(MathAtom(new InsetMathChar(' ')));
 888                 }
 889
 890                 else if (t.cat() == catParameter) {
 891                         Token const & n = getToken();
 892                         cell->push_back(MathAtom(new MathMacroArgument(n.character()-'0')));
 893                 }
 894
 895                 else if (t.cat() == catActive)
 896                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 897
 898                 else if (t.cat() == catBegin) {
 899                         MathData ar;
 900                         parse(ar, FLAG_BRACE_LAST, mode);
 901                         // do not create a BraceInset if they were written by LyX
 902                         // this helps to keep the annoyance of  "a choose b"  to a minimum
 903                         if (ar.size() == 1 && ar[0]->extraBraces())
 904                                 cell->append(ar);
 905                         else
 906                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
 907                 }
 908
 909                 else if (t.cat() == catEnd) {
 910                         if (flags & FLAG_BRACE_LAST)
 911                                 return success_;
 912                         error("found '}' unexpectedly");
 913                         //LASSERT(false, /**/);
 914                         //add(cell, '}', LM_TC_TEX);
 915                 }
 916
 917                 else if (t.cat() == catAlign) {
 918                         //lyxerr << " column now " << (cellcol + 1)
 919                         //       << " max: " << grid.ncols() << endl;
 920                         if (flags & FLAG_ALIGN)
 921                                 return success_;
 922                         if (addCol(grid, cellcol))
 923                                 cell = &grid.cell(grid.index(cellrow, cellcol));
 924                 }
 925
 926                 else if (t.cat() == catSuper || t.cat() == catSub) {
 927                         bool up = (t.cat() == catSuper);
 928                         // we need no new script inset if the last thing was a scriptinset,
 929                         // which has that script already not the same script already
 930                         if (!cell->size())
 931                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 932                         else if (cell->back()->asScriptInset() &&
 933                                         !cell->back()->asScriptInset()->has(up))
 934                                 cell->back().nucleus()->asScriptInset()->ensure(up);
 935                         else if (cell->back()->asScriptInset())
 936                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 937                         else
 938                                 cell->back() = MathAtom(new InsetMathScript(buf, cell->back(), up));
 939                         InsetMathScript * p = cell->back().nucleus()->asScriptInset();
 940                         // special handling of {}-bases
 941                         // Here we could remove the brace inset for things
 942                         // like {a'}^2 and add the braces back in
 943                         // InsetMathScript::write().
 944                         // We do not do it, since it is not possible to detect
 945                         // reliably whether the braces are needed because the
 946                         // nucleus contains more than one symbol, or whether
 947                         // they are needed for unknown commands like \xx{a}_0
 948                         // or \yy{a}{b}_0. This was done in revision 14819
 949                         // in an unreliable way. See this thread
 950                         // http://www.mail-archive.com/lyx-devel%40lists.lyx.org/msg104917.html
 951                         // for more details.
 952                         // However, we remove empty braces because they look
 953                         // ugly on screen and we are sure that they were added
 954                         // by the write() method (and will be re-added on save).
 955                         if (p->nuc().size() == 1 &&
 956                             p->nuc().back()->asBraceInset() &&
 957                             p->nuc().back()->asBraceInset()->cell(0).empty())
 958                                 p->nuc().erase(0);
 959
 960                         parse(p->cell(p->idxOfScript(up)), FLAG_ITEM, mode);
 961                         if (limits) {
 962                                 p->limits(limits);
 963                                 limits = 0;
 964                         }
 965                 }
 966
 967                 else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
 968                         //lyxerr << "finished reading option" << endl;
 969                         return success_;
 970                 }
 971
 972                 else if (t.cat() == catOther) {
 973                         char_type c = t.character();
 974                         if (isAsciiOrMathAlpha(c)
 975                             || mode_ & Parse::VERBATIM
 976                             || !(mode_ & Parse::USETEXT)
 977                             || mode == InsetMath::TEXT_MODE) {
 978                                 cell->push_back(MathAtom(new InsetMathChar(c)));
 979                         } else {
 980                                 MathAtom at = createInsetMath("text", buf);
 981                                 at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 982                                 while (nextToken().cat() == catOther
 983                                        && !isAsciiOrMathAlpha(nextToken().character())) {
 984                                         c = getToken().character();
 985                                         at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 986                                 }
 987                                 cell->push_back(at);
 988                         }
 989                 }
 990
 991                 else if (t.cat() == catComment) {
 992                         docstring s;
 993                         while (good()) {
 994                                 Token const & t = getToken();
 995                                 if (t.cat() == catNewline)
 996                                         break;
 997                                 s += t.asString();
 998                         }
 999                         cell->push_back(MathAtom(new InsetMathComment(buf, s)));
1000                         skipSpaces();
1001                 }
1002
1003                 //
1004                 // control sequences
1005                 //
1006
1007                 else if (t.cs() == "lyxlock") {
1008                         if (cell->size())
1009                                 cell->back().nucleus()->lock(true);
1010                 }
1011
1012                 else if ((t.cs() == "global" && nextToken().cs() == "def") ||
1013                          t.cs() == "def") {
1014                         if (t.cs() == "global")
1015                                 getToken();
1016
1017                         // get name
1018                         docstring name = getToken().cs();
1019
1020                         // read parameters
1021                         int nargs = 0;
1022                         docstring pars;
1023                         while (good() && nextToken().cat() != catBegin) {
1024                                 pars += getToken().cs();
1025                                 ++nargs;
1026                         }
1027                         nargs /= 2;
1028
1029                         // read definition
1030                         MathData def;
1031                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1032
1033                         // is a version for display attached?
1034                         skipSpaces();
1035                         MathData display;
1036                         if (nextToken().cat() == catBegin)
1037                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1038
1039                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1040                                 name, nargs, 0, MacroTypeDef,
1041                                 vector<MathData>(), def, display)));
1042
1043                         if (buf && (mode_ & Parse::TRACKMACRO))
1044                                 buf->usermacros.insert(name);
1045                 }
1046
1047                 else if (t.cs() == "newcommand" ||
1048                          t.cs() == "renewcommand" ||
1049                          t.cs() == "newlyxcommand") {
1050                         // get name
1051                         if (getToken().cat() != catBegin) {
1052                                 error("'{' in \\newcommand expected (1) ");
1053                                 return success_;
1054                         }
1055                         docstring name = getToken().cs();
1056                         if (getToken().cat() != catEnd) {
1057                                 error("'}' in \\newcommand expected");
1058                                 return success_;
1059                         }
1060
1061                         // get arity
1062                         docstring const arg = getArg('[', ']');
1063                         int nargs = 0;
1064                         if (!arg.empty())
1065                                 nargs = convert<int>(arg);
1066
1067                         // optional argument given?
1068                         skipSpaces();
1069                         int optionals = 0;
1070                         vector<MathData> optionalValues;
1071                         while (nextToken().character() == '[') {
1072                                 getToken();
1073                                 optionalValues.push_back(MathData());
1074                                 parse(optionalValues[optionals], FLAG_BRACK_LAST, mode);
1075                                 ++optionals;
1076                         }
1077
1078                         MathData def;
1079                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1080
1081                         // is a version for display attached?
1082                         skipSpaces();
1083                         MathData display;
1084                         if (nextToken().cat() == catBegin)
1085                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1086
1087                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1088                                 name, nargs, optionals, MacroTypeNewcommand,
1089                                 optionalValues, def, display)));
1090
1091                         if (buf && (mode_ & Parse::TRACKMACRO))
1092                                 buf->usermacros.insert(name);
1093                 }
1094
1095                 else if (t.cs() == "newcommandx" ||
1096                          t.cs() == "renewcommandx") {
1097                         // \newcommandx{\foo}[2][usedefault, addprefix=\global,1=default]{#1,#2}
1098                         // get name
1099                         docstring name;
1100                         if (nextToken().cat() == catBegin) {
1101                                 getToken();
1102                                 name = getToken().cs();
1103                                 if (getToken().cat() != catEnd) {
1104                                         error("'}' in \\newcommandx expected");
1105                                         return success_;
1106                                 }
1107                         } else
1108                                 name = getToken().cs();
1109
1110                         // get arity
1111                         docstring const arg = getArg('[', ']');
1112                         if (arg.empty()) {
1113                                 error("[num] in \\newcommandx expected");
1114                                 return success_;
1115                         }
1116                         int nargs = convert<int>(arg);
1117
1118                         // get options
1119                         int optionals = 0;
1120                         vector<MathData> optionalValues;
1121                         if (nextToken().character() == '[') {
1122                                 // skip '['
1123                                 getToken();
1124
1125                                 // handle 'opt=value' options, separated by ','.
1126                                 skipSpaces();
1127                                 while (nextToken().character() != ']' && good()) {
1128                                         if (nextToken().character() >= '1'
1129                                             && nextToken().character() <= '9') {
1130                                                 // optional value -> get parameter number
1131                                                 int n = getChar() - '0';
1132                                                 if (n > nargs) {
1133                                                         error("Arity of \\newcommandx too low "
1134                                                               "for given optional parameter.");
1135                                                         return success_;
1136                                                 }
1137
1138                                                 // skip '='
1139                                                 if (getToken().character() != '=') {
1140                                                         error("'=' and optional parameter value "
1141                                                               "expected for \\newcommandx");
1142                                                         return success_;
1143                                                 }
1144
1145                                                 // get value
1146                                                 int optNum = max(size_t(n), optionalValues.size());
1147                                                 optionalValues.resize(optNum);
1148                                                 optionalValues[n - 1].clear();
1149                                                 while (nextToken().character() != ']'
1150                                                        && nextToken().character() != ',') {
1151                                                         MathData data;
1152                                                         parse(data, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1153                                                         optionalValues[n - 1].append(data);
1154                                                 }
1155                                                 optionals = max(n, optionals);
1156                                         } else if (nextToken().cat() == catLetter) {
1157                                                 // we in fact ignore every non-optional
1158                                                 // parameter
1159
1160                                                 // get option name
1161                                                 docstring opt;
1162                                                 while (nextToken().cat() == catLetter)
1163                                                         opt += getChar();
1164
1165                                                 // value?
1166                                                 skipSpaces();
1167                                                 MathData value;
1168                                                 if (nextToken().character() == '=') {
1169                                                         getToken();
1170                                                         while (nextToken().character() != ']'
1171                                                                 && nextToken().character() != ',')
1172                                                                 parse(value, FLAG_ITEM,
1173                                                                       InsetMath::UNDECIDED_MODE);
1174                                                 }
1175                                         } else {
1176                                                 error("option for \\newcommandx expected");
1177                                                 return success_;
1178                                         }
1179
1180                                         // skip komma
1181                                         skipSpaces();
1182                                         if (nextToken().character() == ',') {
1183                                                 getChar();
1184                                                 skipSpaces();
1185                                         } else if (nextToken().character() != ']') {
1186                                                 error("Expecting ',' or ']' in options "
1187                                                       "of \\newcommandx");
1188                                                 return success_;
1189                                         }
1190                                 }
1191
1192                                 // skip ']'
1193                                 if (!good())
1194                                         return success_;
1195                                 getToken();
1196                         }
1197
1198                         // get definition
1199                         MathData def;
1200                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1201
1202                         // is a version for display attached?
1203                         skipSpaces();
1204                         MathData display;
1205                         if (nextToken().cat() == catBegin)
1206                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1207
1208                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1209                                 name, nargs, optionals, MacroTypeNewcommandx,
1210                                 optionalValues, def, display)));
1211
1212                         if (buf && (mode_ & Parse::TRACKMACRO))
1213                                 buf->usermacros.insert(name);
1214                 }
1215
1216                 else if (t.cs() == "(") {
1217                         if (mode == InsetMath::MATH_MODE) {
1218                                 error("bad math environment");
1219                                 break;
1220                         }
1221                         cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1222                         parse2(cell->back(), FLAG_SIMPLE2, InsetMath::MATH_MODE, false);
1223                 }
1224
1225                 else if (t.cs() == "[") {
1226                         if (mode != InsetMath::UNDECIDED_MODE) {
1227                                 error("bad math environment");
1228                                 break;
1229                         }
1230                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1231                         parse2(cell->back(), FLAG_EQUATION, InsetMath::MATH_MODE, false);
1232                 }
1233
1234                 else if (t.cs() == "protect")
1235                         // ignore \\protect, will hopefully be re-added during output
1236                         ;
1237
1238                 else if (t.cs() == "end") {
1239                         if (flags & FLAG_END) {
1240                                 // eat environment name
1241                                 docstring const name = getArg('{', '}');
1242                                 if (environments_.empty())
1243                                         error("'found \\end{" + name +
1244                                               "}' without matching '\\begin{" +
1245                                               name + "}'");
1246                                 else if (name != environments_.back())
1247                                         error("'\\end{" + name +
1248                                               "}' does not match '\\begin{" +
1249                                               environments_.back() + "}'");
1250                                 else {
1251                                         environments_.pop_back();
1252                                         // Delete empty last row in matrix
1253                                         // like insets.
1254                                         // If you abuse InsetMathGrid for
1255                                         // non-matrix like structures you
1256                                         // probably need to refine this test.
1257                                         // Right now we only have to test for
1258                                         // single line hull insets.
1259                                         if (grid.nrows() > 1 && innerHull(name))
1260                                                 delEmptyLastRow(grid);
1261                                         return success_;
1262                                 }
1263                         } else
1264                                 error("found 'end' unexpectedly");
1265                 }
1266
1267                 else if (t.cs() == ")") {
1268                         if (flags & FLAG_SIMPLE2)
1269                                 return success_;
1270                         error("found '\\)' unexpectedly");
1271                 }
1272
1273                 else if (t.cs() == "]") {
1274                         if (flags & FLAG_EQUATION)
1275                                 return success_;
1276                         error("found '\\]' unexpectedly");
1277                 }
1278
1279                 else if (t.cs() == "\\") {
1280                         if (flags & FLAG_ALIGN)
1281                                 return success_;
1282                         bool added = false;
1283                         if (nextToken().asInput() == "*") {
1284                                 getToken();
1285                                 added = addRow(grid, cellrow, docstring(), false);
1286                         } else if (good())
1287                                 added = addRow(grid, cellrow, getArg('[', ']'));
1288                         else
1289                                 error("missing token after \\\\");
1290                         if (added) {
1291                                 cellcol = 0;
1292                                 if (grid.asHullInset())
1293                                         grid.asHullInset()->numbered(
1294                                                         cellrow, numbered);
1295                                 cell = &grid.cell(grid.index(cellrow,
1296                                                              cellcol));
1297                         }
1298                 }
1299
1300 #if 0
1301                 else if (t.cs() == "multicolumn") {
1302                         // extract column count and insert dummy cells
1303                         MathData count;
1304                         parse(count, FLAG_ITEM, mode);
1305                         int cols = 1;
1306                         if (!extractNumber(count, cols)) {
1307                                 success_ = false;
1308                                 lyxerr << " can't extract number of cells from " << count << endl;
1309                         }
1310                         // resize the table if necessary
1311                         for (int i = 0; i < cols; ++i) {
1312                                 if (addCol(grid, cellcol)) {
1313                                         cell = &grid.cell(grid.index(
1314                                                         cellrow, cellcol));
1315                                         // mark this as dummy
1316                                         grid.cellinfo(grid.index(
1317                                                 cellrow, cellcol)).dummy_ = true;
1318                                 }
1319                         }
1320                         // the last cell is the real thing, not a dummy
1321                         grid.cellinfo(grid.index(cellrow, cellcol)).dummy_ = false;
1322
1323                         // read special alignment
1324                         MathData align;
1325                         parse(align, FLAG_ITEM, mode);
1326                         //grid.cellinfo(grid.index(cellrow, cellcol)).align_ = extractString(align);
1327
1328                         // parse the remaining contents into the "real" cell
1329                         parse(*cell, FLAG_ITEM, mode);
1330                 }
1331 #endif
1332
1333                 else if (t.cs() == "limits" || t.cs() == "nolimits") {
1334                         CatCode cat = nextToken().cat();
1335                         if (cat == catSuper || cat == catSub)
1336                                 limits = t.cs() == "limits" ? 1 : -1;
1337                         else {
1338                                 MathAtom at = createInsetMath(t.cs(), buf);
1339                                 cell->push_back(at);
1340                         }
1341                 }
1342
1343                 else if (t.cs() == "nonumber") {
1344                         if (grid.asHullInset())
1345                                 grid.asHullInset()->numbered(cellrow, false);
1346                 }
1347
1348                 else if (t.cs() == "number") {
1349                         if (grid.asHullInset())
1350                                 grid.asHullInset()->numbered(cellrow, true);
1351                 }
1352
1353                 else if (t.cs() == "hline") {
1354                         grid.rowinfo(cellrow).lines_ ++;
1355                 }
1356
1357                 else if (t.cs() == "sqrt") {
1358                         MathData ar;
1359                         parse(ar, FLAG_OPTION, mode);
1360                         if (ar.size()) {
1361                                 cell->push_back(MathAtom(new InsetMathRoot(buf)));
1362                                 cell->back().nucleus()->cell(0) = ar;
1363                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1364                         } else {
1365                                 cell->push_back(MathAtom(new InsetMathSqrt(buf)));
1366                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1367                         }
1368                 }
1369
1370                 else if (t.cs() == "unit") {
1371                         // Allowed formats \unit[val]{unit}
1372                         MathData ar;
1373                         parse(ar, FLAG_OPTION, mode);
1374                         if (ar.size()) {
1375                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT)));
1376                                 cell->back().nucleus()->cell(0) = ar;
1377                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1378                         } else {
1379                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT, 1)));
1380                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1381                         }
1382                 }
1383
1384                 else if (t.cs() == "unitfrac") {
1385                         // Here allowed formats are \unitfrac[val]{num}{denom}
1386                         MathData ar;
1387                         parse(ar, FLAG_OPTION, mode);
1388                         if (ar.size()) {
1389                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC, 3)));
1390                                 cell->back().nucleus()->cell(2) = ar;
1391                         } else {
1392                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC)));
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() == "cfrac") {
1399                         // allowed formats are \cfrac[pos]{num}{denom}
1400                         docstring const arg = getArg('[', ']');
1401                         //lyxerr << "got so far: '" << arg << "'" << endl;
1402                                 if (arg == "l")
1403                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT)));
1404                                 else if (arg == "r")
1405                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT)));
1406                                 else if (arg.empty() || arg == "c")
1407                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRAC)));
1408                                 else {
1409                                         error("found invalid optional argument");
1410                                         break;
1411                                 }
1412                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1413                         parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1414                 }
1415
1416                 else if (t.cs() == "xrightarrow" || t.cs() == "xleftarrow") {
1417                         cell->push_back(createInsetMath(t.cs(), buf));
1418                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1419                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1420                 }
1421
1422                 else if (t.cs() == "ref" || t.cs() == "eqref" || t.cs() == "prettyref"
1423                           || t.cs() == "pageref" || t.cs() == "vpageref" || t.cs() == "vref") {
1424                         cell->push_back(MathAtom(new InsetMathRef(buf, t.cs())));
1425                         docstring const opt = parse_verbatim_option();
1426                         docstring const ref = parse_verbatim_item();
1427                         if (!opt.empty()) {
1428                                 cell->back().nucleus()->cell(1).push_back(
1429                                         MathAtom(new InsetMathString(opt)));
1430                         }
1431                         cell->back().nucleus()->cell(0).push_back(
1432                                         MathAtom(new InsetMathString(ref)));
1433                 }
1434
1435                 else if (t.cs() == "left") {
1436                         skipSpaces();
1437                         Token const & tl = getToken();
1438                         // \| and \Vert are equivalent, and InsetMathDelim
1439                         // can't handle \|
1440                         // FIXME: fix this in InsetMathDelim itself!
1441                         docstring const l = tl.cs() == "|" ? from_ascii("Vert") : tl.asString();
1442                         MathData ar;
1443                         parse(ar, FLAG_RIGHT, mode);
1444                         if (!good())
1445                                 break;
1446                         skipSpaces();
1447                         Token const & tr = getToken();
1448                         docstring const r = tr.cs() == "|" ? from_ascii("Vert") : tr.asString();
1449                         cell->push_back(MathAtom(new InsetMathDelim(buf, l, r, ar)));
1450                 }
1451
1452                 else if (t.cs() == "right") {
1453                         if (flags & FLAG_RIGHT)
1454                                 return success_;
1455                         //lyxerr << "got so far: '" << cell << "'" << endl;
1456                         error("Unmatched right delimiter");
1457                         return success_;
1458                 }
1459
1460                 else if (t.cs() == "begin") {
1461                         docstring const name = getArg('{', '}');
1462                         environments_.push_back(name);
1463
1464                         if (name == "array" || name == "subarray") {
1465                                 docstring const valign = parse_verbatim_option() + 'c';
1466                                 docstring const halign = parse_verbatim_item();
1467                                 cell->push_back(MathAtom(new InsetMathArray(buf, name,
1468                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1469                                 parse2(cell->back(), FLAG_END, mode, false);
1470                         }
1471
1472                         else if (name == "tabular") {
1473                                 docstring const valign = parse_verbatim_option() + 'c';
1474                                 docstring const halign = parse_verbatim_item();
1475                                 cell->push_back(MathAtom(new InsetMathTabular(buf, name,
1476                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1477                                 parse2(cell->back(), FLAG_END, InsetMath::TEXT_MODE, false);
1478                         }
1479
1480                         else if (name == "split" || name == "cases") {
1481                                 cell->push_back(createInsetMath(name, buf));
1482                                 parse2(cell->back(), FLAG_END, mode, false);
1483                         }
1484
1485                         else if (name == "alignedat") {
1486                                 docstring const valign = parse_verbatim_option() + 'c';
1487                                 // ignore this for a while
1488                                 getArg('{', '}');
1489                                 cell->push_back(MathAtom(new InsetMathSplit(buf, name, (char)valign[0])));
1490                                 parse2(cell->back(), FLAG_END, mode, false);
1491                         }
1492
1493                         else if (name == "math") {
1494                                 if (mode == InsetMath::MATH_MODE) {
1495                                         error("bad math environment");
1496                                         break;
1497                                 }
1498                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1499                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, true);
1500                         }
1501
1502                         else if (name == "equation" || name == "equation*"
1503                                         || name == "displaymath") {
1504                                 if (mode != InsetMath::UNDECIDED_MODE) {
1505                                         error("bad math environment");
1506                                         break;
1507                                 }
1508                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1509                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, (name == "equation"));
1510                         }
1511
1512                         else if (name == "eqnarray" || name == "eqnarray*") {
1513                                 if (mode != InsetMath::UNDECIDED_MODE) {
1514                                         error("bad math environment");
1515                                         break;
1516                                 }
1517                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEqnArray)));
1518                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1519                         }
1520
1521                         else if (name == "align" || name == "align*") {
1522                                 if (mode != InsetMath::UNDECIDED_MODE) {
1523                                         error("bad math environment");
1524                                         break;
1525                                 }
1526                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlign)));
1527                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1528                         }
1529
1530                         else if (name == "flalign" || name == "flalign*") {
1531                                 if (mode != InsetMath::UNDECIDED_MODE) {
1532                                         error("bad math environment");
1533                                         break;
1534                                 }
1535                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullFlAlign)));
1536                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1537                         }
1538
1539                         else if (name == "alignat" || name == "alignat*") {
1540                                 if (mode != InsetMath::UNDECIDED_MODE) {
1541                                         error("bad math environment");
1542                                         break;
1543                                 }
1544                                 // ignore this for a while
1545                                 getArg('{', '}');
1546                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlignAt)));
1547                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1548                         }
1549
1550                         else if (name == "xalignat" || name == "xalignat*") {
1551                                 if (mode != InsetMath::UNDECIDED_MODE) {
1552                                         error("bad math environment");
1553                                         break;
1554                                 }
1555                                 // ignore this for a while
1556                                 getArg('{', '}');
1557                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXAlignAt)));
1558                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1559                         }
1560
1561                         else if (name == "xxalignat") {
1562                                 if (mode != InsetMath::UNDECIDED_MODE) {
1563                                         error("bad math environment");
1564                                         break;
1565                                 }
1566                                 // ignore this for a while
1567                                 getArg('{', '}');
1568                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXXAlignAt)));
1569                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1570                         }
1571
1572                         else if (name == "multline" || name == "multline*") {
1573                                 if (mode != InsetMath::UNDECIDED_MODE) {
1574                                         error("bad math environment");
1575                                         break;
1576                                 }
1577                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullMultline)));
1578                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1579                         }
1580
1581                         else if (name == "gather" || name == "gather*") {
1582                                 if (mode != InsetMath::UNDECIDED_MODE) {
1583                                         error("bad math environment");
1584                                         break;
1585                                 }
1586                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullGather)));
1587                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1588                         }
1589
1590                         else if (latexkeys const * l = in_word_set(name)) {
1591                                 if (l->inset == "matrix") {
1592                                         cell->push_back(createInsetMath(name, buf));
1593                                         parse2(cell->back(), FLAG_END, mode, false);
1594                                 } else if (l->inset == "split") {
1595                                         docstring const valign = parse_verbatim_option() + 'c';
1596                                         cell->push_back(MathAtom(
1597                                                 new InsetMathSplit(buf, name, (char)valign[0])));
1598                                         parse2(cell->back(), FLAG_END, mode, false);
1599                                 } else {
1600                                         success_ = false;
1601                                         if (!(mode_ & Parse::QUIET)) {
1602                                                 dump();
1603                                                 lyxerr << "found math environment `"
1604                                                        << to_utf8(name)
1605                                                        << "' in symbols file with unsupported inset `"
1606                                                        << to_utf8(l->inset)
1607                                                        << "'." << endl;
1608                                         }
1609                                         // create generic environment inset
1610                                         cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1611                                         parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1612                                 }
1613                         }
1614
1615                         else {
1616                                 success_ = false;
1617                                 if (!(mode_ & Parse::QUIET)) {
1618                                         dump();
1619                                         lyxerr << "found unknown math environment '"
1620                                                << to_utf8(name) << "'" << endl;
1621                                 }
1622                                 // create generic environment inset
1623                                 cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1624                                 parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1625                         }
1626                 }
1627
1628                 else if (t.cs() == "kern") {
1629                         // FIXME: A hack...
1630                         docstring s;
1631                         int num_tokens = 0;
1632                         while (true) {
1633                                 Token const & t = getToken();
1634                                 ++num_tokens;
1635                                 if (!good()) {
1636                                         s.clear();
1637                                         while (num_tokens--)
1638                                                 putback();
1639                                         break;
1640                                 }
1641                                 s += t.character();
1642                                 if (isValidLength(to_utf8(s)))
1643                                         break;
1644                         }
1645                         if (s.empty())
1646                                 cell->push_back(MathAtom(new InsetMathKern));
1647                         else
1648                                 cell->push_back(MathAtom(new InsetMathKern(s)));
1649                 }
1650
1651                 else if (t.cs() == "label") {
1652                         // FIXME: This is swallowed in inline formulas
1653                         docstring label = parse_verbatim_item();
1654                         MathData ar;
1655                         asArray(label, ar);
1656                         if (grid.asHullInset()) {
1657                                 grid.asHullInset()->label(cellrow, label);
1658                         } else {
1659                                 cell->push_back(createInsetMath(t.cs(), buf));
1660                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
1661                         }
1662                 }
1663
1664                 else if (t.cs() == "choose" || t.cs() == "over"
1665                                 || t.cs() == "atop" || t.cs() == "brace"
1666                                 || t.cs() == "brack") {
1667                         MathAtom at = createInsetMath(t.cs(), buf);
1668                         at.nucleus()->cell(0) = *cell;
1669                         cell->clear();
1670                         parse(at.nucleus()->cell(1), flags, mode);
1671                         cell->push_back(at);
1672                         return success_;
1673                 }
1674
1675                 else if (t.cs() == "color") {
1676                         docstring const color = parse_verbatim_item();
1677                         cell->push_back(MathAtom(new InsetMathColor(buf, true, color)));
1678                         parse(cell->back().nucleus()->cell(0), flags, mode);
1679                         return success_;
1680                 }
1681
1682                 else if (t.cs() == "textcolor") {
1683                         docstring const color = parse_verbatim_item();
1684                         cell->push_back(MathAtom(new InsetMathColor(buf, false, color)));
1685                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1686                 }
1687
1688                 else if (t.cs() == "normalcolor") {
1689                         cell->push_back(createInsetMath(t.cs(), buf));
1690                         parse(cell->back().nucleus()->cell(0), flags, mode);
1691                         return success_;
1692                 }
1693
1694                 else if (t.cs() == "substack") {
1695                         cell->push_back(createInsetMath(t.cs(), buf));
1696                         parse2(cell->back(), FLAG_ITEM, mode, false);
1697                 }
1698
1699                 else if (t.cs() == "xymatrix") {
1700                         odocstringstream os;
1701                         while (good() && nextToken().cat() != catBegin)
1702                                 os << getToken().asInput();
1703                         cell->push_back(createInsetMath(t.cs() + os.str(), buf));
1704                         parse2(cell->back(), FLAG_ITEM, mode, false);
1705                 }
1706
1707                 else if (t.cs() == "framebox" || t.cs() == "makebox") {
1708                         cell->push_back(createInsetMath(t.cs(), buf));
1709                         parse(cell->back().nucleus()->cell(0), FLAG_OPTION, InsetMath::TEXT_MODE);
1710                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, InsetMath::TEXT_MODE);
1711                         parse(cell->back().nucleus()->cell(2), FLAG_ITEM, InsetMath::TEXT_MODE);
1712                 }
1713
1714                 else if (t.cs() == "tag") {
1715                         if (nextToken().character() == '*') {
1716                                 getToken();
1717                                 cell->push_back(createInsetMath(t.cs() + '*', buf));
1718                         } else
1719                                 cell->push_back(createInsetMath(t.cs(), buf));
1720                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1721                 }
1722
1723                 else if (t.cs() == "hspace" && nextToken().character() != '*') {
1724                         docstring const name = t.cs();
1725                         docstring const arg = parse_verbatim_item();
1726                         Length length;
1727                         if (isValidLength(to_utf8(arg), &length))
1728                                 cell->push_back(MathAtom(new InsetMathSpace(length)));
1729                         else {
1730                                 // Since the Length class cannot use length variables
1731                                 // we must not create an InsetMathSpace.
1732                                 cell->push_back(MathAtom(new MathMacro(buf, name)));
1733                                 MathData ar;
1734                                 mathed_parse_cell(ar, '{' + arg + '}', mode_);
1735                                 cell->append(ar);
1736                         }
1737                 }
1738
1739 #if 0
1740                 else if (t.cs() == "infer") {
1741                         MathData ar;
1742                         parse(ar, FLAG_OPTION, mode);
1743                         cell->push_back(createInsetMath(t.cs(), buf));
1744                         parse2(cell->back(), FLAG_ITEM, mode, false);
1745                 }
1746
1747                 // Disabled
1748                 else if (1 && t.cs() == "ar") {
1749                         auto_ptr<InsetMathXYArrow> p(new InsetMathXYArrow);
1750                         // try to read target
1751                         parse(p->cell(0), FLAG_OTPTION, mode);
1752                         // try to read label
1753                         if (nextToken().cat() == catSuper || nextToken().cat() == catSub) {
1754                                 p->up_ = nextToken().cat() == catSuper;
1755                                 getToken();
1756                                 parse(p->cell(1), FLAG_ITEM, mode);
1757                                 //lyxerr << "read label: " << p->cell(1) << endl;
1758                         }
1759
1760                         cell->push_back(MathAtom(p.release()));
1761                         //lyxerr << "read cell: " << cell << endl;
1762                 }
1763 #endif
1764
1765                 else if (t.cs() == "lyxmathsym") {
1766                         skipSpaces();
1767                         if (getToken().cat() != catBegin) {
1768                                 error("'{' expected in \\" + t.cs());
1769                                 return success_;
1770                         }
1771                         int count = 0;
1772                         docstring cmd;
1773                         CatCode cat = nextToken().cat();
1774                         while (good() && (count || cat != catEnd)) {
1775                                 if (cat == catBegin)
1776                                         ++count;
1777                                 else if (cat == catEnd)
1778                                         --count;
1779                                 cmd += getToken().asInput();
1780                                 cat = nextToken().cat();
1781                         }
1782                         if (getToken().cat() != catEnd) {
1783                                 error("'}' expected in \\" + t.cs());
1784                                 return success_;
1785                         }
1786                         docstring rem;
1787                         do {
1788                                 cmd = Encodings::fromLaTeXCommand(cmd, rem);
1789                                 for (size_t i = 0; i < cmd.size(); ++i)
1790                                         cell->push_back(MathAtom(new InsetMathChar(cmd[i])));
1791                                 if (rem.size()) {
1792                                         char_type c = rem[0];
1793                                         cell->push_back(MathAtom(new InsetMathChar(c)));
1794                                         cmd = rem.substr(1);
1795                                         rem.clear();
1796                                 } else
1797                                         cmd.clear();
1798                         } while (cmd.size());
1799                 }
1800
1801                 else if (t.cs().size()) {
1802                         bool const no_mhchem =
1803                                 (t.cs() == "ce" || t.cs() == "cf") && buf
1804                                 && buf->params().use_mhchem == BufferParams::package_off;
1805                         bool const is_user_macro = no_mhchem ||
1806                                 (buf && (mode_ & Parse::TRACKMACRO
1807                                         ? buf->usermacros.count(t.cs()) != 0
1808                                         : buf->getMacro(t.cs(), false) != 0));
1809                         latexkeys const * l = in_word_set(t.cs());
1810                         if (l && !is_user_macro) {
1811                                 if (l->inset == "big") {
1812                                         skipSpaces();
1813                                         docstring const delim = getToken().asInput();
1814                                         if (InsetMathBig::isBigInsetDelim(delim))
1815                                                 cell->push_back(MathAtom(
1816                                                         new InsetMathBig(t.cs(), delim)));
1817                                         else {
1818                                                 cell->push_back(createInsetMath(t.cs(), buf));
1819                                                 putback();
1820                                         }
1821                                 }
1822
1823                                 else if (l->inset == "font") {
1824                                         cell->push_back(createInsetMath(t.cs(), buf));
1825                                         parse(cell->back().nucleus()->cell(0),
1826                                                 FLAG_ITEM, asMode(mode, l->extra));
1827                                 }
1828
1829                                 else if (l->inset == "oldfont") {
1830                                         cell->push_back(createInsetMath(t.cs(), buf));
1831                                         parse(cell->back().nucleus()->cell(0),
1832                                                 flags | FLAG_ALIGN, asMode(mode, l->extra));
1833                                         if (prevToken().cat() != catAlign &&
1834                                             prevToken().cs() != "\\")
1835                                                 return success_;
1836                                         putback();
1837                                 }
1838
1839                                 else if (l->inset == "style") {
1840                                         cell->push_back(createInsetMath(t.cs(), buf));
1841                                         parse(cell->back().nucleus()->cell(0),
1842                                                 flags | FLAG_ALIGN, mode);
1843                                         if (prevToken().cat() != catAlign &&
1844                                             prevToken().cs() != "\\")
1845                                                 return success_;
1846                                         putback();
1847                                 }
1848
1849                                 else {
1850                                         MathAtom at = createInsetMath(t.cs(), buf);
1851                                         for (InsetMath::idx_type i = 0; i < at->nargs(); ++i)
1852                                                 parse(at.nucleus()->cell(i),
1853                                                         FLAG_ITEM, asMode(mode, l->extra));
1854                                         cell->push_back(at);
1855                                 }
1856                         }
1857
1858                         else {
1859                                 bool is_unicode_symbol = false;
1860                                 if (mode == InsetMath::TEXT_MODE && !is_user_macro) {
1861                                         int num_tokens = 0;
1862                                         docstring cmd = prevToken().asInput();
1863                                         CatCode cat = nextToken().cat();
1864                                         if (cat == catBegin) {
1865                                                 int count = 0;
1866                                                 while (good() && (count || cat != catEnd)) {
1867                                                         cat = nextToken().cat();
1868                                                         cmd += getToken().asInput();
1869                                                         ++num_tokens;
1870                                                         if (cat == catBegin)
1871                                                                 ++count;
1872                                                         else if (cat == catEnd)
1873                                                                 --count;
1874                                                 }
1875                                         }
1876                                         bool is_combining;
1877                                         char_type c =
1878                                                 Encodings::fromLaTeXCommand(cmd, is_combining);
1879                                         if (is_combining) {
1880                                                 if (cat == catLetter)
1881                                                         cmd += '{';
1882                                                 cmd += getToken().asInput();
1883                                                 ++num_tokens;
1884                                                 if (cat == catLetter)
1885                                                         cmd += '}';
1886                                                 c = Encodings::fromLaTeXCommand(cmd, is_combining);
1887                                         }
1888                                         if (c) {
1889                                                 is_unicode_symbol = true;
1890                                                 cell->push_back(MathAtom(new InsetMathChar(c)));
1891                                         } else {
1892                                                 while (num_tokens--)
1893                                                         putback();
1894                                         }
1895                                 }
1896                                 if (!is_unicode_symbol) {
1897                                         MathAtom at = is_user_macro ?
1898                                                 MathAtom(new MathMacro(buf, t.cs()))
1899                                                 : createInsetMath(t.cs(), buf);
1900                                         InsetMath::mode_type m = mode;
1901                                         //if (m == InsetMath::UNDECIDED_MODE)
1902                                         //lyxerr << "default creation: m1: " << m << endl;
1903                                         if (at->currentMode() != InsetMath::UNDECIDED_MODE)
1904                                                 m = at->currentMode();
1905                                         //lyxerr << "default creation: m2: " << m << endl;
1906                                         InsetMath::idx_type start = 0;
1907                                         // this fails on \bigg[...\bigg]
1908                                         //MathData opt;
1909                                         //parse(opt, FLAG_OPTION, InsetMath::VERBATIM_MODE);
1910                                         //if (opt.size()) {
1911                                         //      start = 1;
1912                                         //      at.nucleus()->cell(0) = opt;
1913                                         //}
1914                                         for (InsetMath::idx_type i = start; i < at->nargs(); ++i) {
1915                                                 parse(at.nucleus()->cell(i), FLAG_ITEM, m);
1916                                                 skipSpaces();
1917                                         }
1918                                         cell->push_back(at);
1919                                 }
1920                         }
1921                 }
1922
1923
1924                 if (flags & FLAG_LEAVE) {
1925                         flags &= ~FLAG_LEAVE;
1926                         break;
1927                 }
1928         }
1929         return success_;
1930 }
1931
1932
1933
1934 } // anonymous namespace
1935
1936
1937 bool mathed_parse_cell(MathData & ar, docstring const & str, Parse::flags f)
1938 {
1939         return Parser(str, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1940                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1941 }
1942
1943
1944 bool mathed_parse_cell(MathData & ar, istream & is, Parse::flags f)
1945 {
1946         return Parser(is, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1947                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1948 }
1949
1950
1951 bool mathed_parse_normal(Buffer * buf, MathAtom & t, docstring const & str,
1952                          Parse::flags f)
1953 {
1954         return Parser(str, f, buf).parse(t);
1955 }
1956
1957
1958 bool mathed_parse_normal(Buffer * buf, MathAtom & t, Lexer & lex,
1959                          Parse::flags f)
1960 {
1961         return Parser(lex, f, buf).parse(t);
1962 }
1963
1964
1965 bool mathed_parse_normal(InsetMathGrid & grid, docstring const & str,
1966                          Parse::flags f)
1967 {
1968         return Parser(str, f, &grid.buffer()).parse1(grid, 0, f & Parse::TEXTMODE ?
1969                         InsetMath::TEXT_MODE : InsetMath::MATH_MODE, false);
1970 }
1971
1972
1973 void initParser()
1974 {
1975         fill(theCatcode, theCatcode + 128, catOther);
1976         fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
1977         fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
1978
1979         theCatcode[int('\\')] = catEscape;
1980         theCatcode[int('{')]  = catBegin;
1981         theCatcode[int('}')]  = catEnd;
1982         theCatcode[int('$')]  = catMath;
1983         theCatcode[int('&')]  = catAlign;
1984         theCatcode[int('\n')] = catNewline;
1985         theCatcode[int('#')]  = catParameter;
1986         theCatcode[int('^')]  = catSuper;
1987         theCatcode[int('_')]  = catSub;
1988         theCatcode[int(0x7f)] = catIgnore;
1989         theCatcode[int(' ')]  = catSpace;
1990         theCatcode[int('\t')] = catSpace;
1991         theCatcode[int('\r')] = catNewline;
1992         theCatcode[int('~')]  = catActive;
1993         theCatcode[int('%')]  = catComment;
1994 }
1995
1996
1997 } // namespace lyx