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                 || name == "tabular";
 254 }
 255
 256
 257 // These are TeX's catcodes
 258 enum CatCode {
 259         catEscape,     // 0    backslash
 260         catBegin,      // 1    {
 261         catEnd,        // 2    }
 262         catMath,       // 3    $
 263         catAlign,      // 4    &
 264         catNewline,    // 5    ^^M
 265         catParameter,  // 6    #
 266         catSuper,      // 7    ^
 267         catSub,        // 8    _
 268         catIgnore,     // 9
 269         catSpace,      // 10   space
 270         catLetter,     // 11   a-zA-Z
 271         catOther,      // 12   none of the above
 272         catActive,     // 13   ~
 273         catComment,    // 14   %
 274         catInvalid     // 15   <delete>
 275 };
 276
 277 CatCode theCatcode[128];
 278
 279
 280 inline CatCode catcode(char_type c)
 281 {
 282         /* The only characters that are not catOther lie in the pure ASCII
 283          * range. Therefore theCatcode has only 128 entries.
 284          * TeX itself deals with 8bit characters, so if needed this table
 285          * could be enlarged to 256 entries.
 286          * Any larger value does not make sense, since the fact that we use
 287          * unicode internally does not change Knuth's TeX engine.
 288          * Apart from that a table for the full 21bit UCS4 range would waste
 289          * too much memory. */
 290         if (c >= 128)
 291                 return catOther;
 292
 293         return theCatcode[c];
 294 }
 295
 296
 297 enum {
 298         FLAG_ALIGN      = 1 << 0,  //  next & or \\ ends the parsing process
 299         FLAG_BRACE_LAST = 1 << 1,  //  next closing brace ends the parsing
 300         FLAG_RIGHT      = 1 << 2,  //  next \\right ends the parsing process
 301         FLAG_END        = 1 << 3,  //  next \\end ends the parsing process
 302         FLAG_BRACK_LAST = 1 << 4,  //  next closing bracket ends the parsing
 303         FLAG_TEXTMODE   = 1 << 5,  //  we are in a box
 304         FLAG_ITEM       = 1 << 6,  //  read a (possibly braced) token
 305         FLAG_LEAVE      = 1 << 7,  //  leave the loop at the end
 306         FLAG_SIMPLE     = 1 << 8,  //  next $ leaves the loop
 307         FLAG_EQUATION   = 1 << 9,  //  next \] leaves the loop
 308         FLAG_SIMPLE2    = 1 << 10, //  next \) leaves the loop
 309         FLAG_OPTION     = 1 << 11, //  read [...] style option
 310         FLAG_BRACED     = 1 << 12  //  read {...} style argument
 311 };
 312
 313
 314 //
 315 // Helper class for parsing
 316 //
 317
 318 class Token {
 319 public:
 320         ///
 321         Token() : cs_(), char_(0), cat_(catIgnore) {}
 322         ///
 323         Token(char_type c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
 324         ///
 325         explicit Token(docstring const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
 326
 327         ///
 328         docstring const & cs() const { return cs_; }
 329         ///
 330         CatCode cat() const { return cat_; }
 331         ///
 332         char_type character() const { return char_; }
 333         ///
 334         docstring asString() const { return cs_.size() ? cs_ : docstring(1, char_); }
 335         ///
 336         docstring asInput() const { return cs_.size() ? '\\' + cs_ : docstring(1, char_); }
 337
 338 private:
 339         ///
 340         docstring cs_;
 341         ///
 342         char_type char_;
 343         ///
 344         CatCode cat_;
 345 };
 346
 347
 348 ostream & operator<<(ostream & os, Token const & t)
 349 {
 350         if (t.cs().size()) {
 351                 docstring const & cs = t.cs();
 352                 // FIXME: For some strange reason, the stream operator instanciate
 353                 // a new Token before outputting the contents of t.cs().
 354                 // Because of this the line
 355                 //     os << '\\' << cs;
 356                 // below becomes recursive.
 357                 // In order to avoid that we return early:
 358                 if (cs == "\\")
 359                         return os;
 360                 os << '\\' << to_utf8(cs);
 361         }
 362         else if (t.cat() == catLetter)
 363                 os << t.character();
 364         else
 365                 os << '[' << t.character() << ',' << t.cat() << ']';
 366         return os;
 367 }
 368
 369
 370 class Parser {
 371 public:
 372         ///
 373         typedef  InsetMath::mode_type mode_type;
 374         ///
 375         typedef  Parse::flags parse_mode;
 376
 377         ///
 378         Parser(Lexer & lex, parse_mode mode, Buffer * buf);
 379         /// Only use this for reading from .lyx file format, for the reason
 380         /// see Parser::tokenize(istream &).
 381         Parser(istream & is, parse_mode mode, Buffer * buf);
 382         ///
 383         Parser(docstring const & str, parse_mode mode, Buffer * buf);
 384
 385         ///
 386         bool parse(MathAtom & at);
 387         ///
 388         bool parse(MathData & array, unsigned flags, mode_type mode);
 389         ///
 390         bool parse1(InsetMathGrid & grid, unsigned flags, mode_type mode,
 391                 bool numbered);
 392         ///
 393         MathData parse(unsigned flags, mode_type mode);
 394         ///
 395         int lineno() const { return lineno_; }
 396         ///
 397         void putback();
 398
 399 private:
 400         ///
 401         void parse2(MathAtom & at, unsigned flags, mode_type mode, bool numbered);
 402         /// get arg delimited by 'left' and 'right'
 403         docstring getArg(char_type left, char_type right);
 404         ///
 405         char_type getChar();
 406         ///
 407         void error(string const & msg);
 408         void error(docstring const & msg) { error(to_utf8(msg)); }
 409         /// dump contents to screen
 410         void dump() const;
 411         /// Only use this for reading from .lyx file format (see
 412         /// implementation for reason)
 413         void tokenize(istream & is);
 414         ///
 415         void tokenize(docstring const & s);
 416         ///
 417         void skipSpaceTokens(idocstream & is, char_type c);
 418         ///
 419         void push_back(Token const & t);
 420         ///
 421         void pop_back();
 422         ///
 423         Token const & prevToken() const;
 424         ///
 425         Token const & nextToken() const;
 426         ///
 427         Token const & getToken();
 428         /// skips spaces if any
 429         void skipSpaces();
 430         ///
 431         void lex(docstring const & s);
 432         ///
 433         bool good() const;
 434         ///
 435         docstring parse_verbatim_item();
 436         ///
 437         docstring parse_verbatim_option();
 438
 439         ///
 440         int lineno_;
 441         ///
 442         vector<Token> tokens_;
 443         ///
 444         unsigned pos_;
 445         /// Stack of active environments
 446         vector<docstring> environments_;
 447         ///
 448         parse_mode mode_;
 449         ///
 450         bool success_;
 451         ///
 452         Buffer * buffer_;
 453 };
 454
 455
 456 Parser::Parser(Lexer & lexer, parse_mode mode, Buffer * buf)
 457         : lineno_(lexer.lineNumber()), pos_(0), mode_(mode), success_(true),
 458           buffer_(buf)
 459 {
 460         tokenize(lexer.getStream());
 461         lexer.eatLine();
 462 }
 463
 464
 465 Parser::Parser(istream & is, parse_mode mode, Buffer * buf)
 466         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 467 {
 468         tokenize(is);
 469 }
 470
 471
 472 Parser::Parser(docstring const & str, parse_mode mode, Buffer * buf)
 473         : lineno_(0), pos_(0), mode_(mode), success_(true), buffer_(buf)
 474 {
 475         tokenize(str);
 476 }
 477
 478
 479 void Parser::push_back(Token const & t)
 480 {
 481         tokens_.push_back(t);
 482 }
 483
 484
 485 void Parser::pop_back()
 486 {
 487         tokens_.pop_back();
 488 }
 489
 490
 491 Token const & Parser::prevToken() const
 492 {
 493         static const Token dummy;
 494         return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
 495 }
 496
 497
 498 Token const & Parser::nextToken() const
 499 {
 500         static const Token dummy;
 501         return good() ? tokens_[pos_] : dummy;
 502 }
 503
 504
 505 Token const & Parser::getToken()
 506 {
 507         static const Token dummy;
 508         //lyxerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << endl;
 509         return good() ? tokens_[pos_++] : dummy;
 510 }
 511
 512
 513 void Parser::skipSpaces()
 514 {
 515         while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
 516                 getToken();
 517 }
 518
 519
 520 void Parser::putback()
 521 {
 522         --pos_;
 523 }
 524
 525
 526 bool Parser::good() const
 527 {
 528         return pos_ < tokens_.size();
 529 }
 530
 531
 532 char_type Parser::getChar()
 533 {
 534         if (!good()) {
 535                 error("The input stream is not well...");
 536                 putback();
 537                 return 0;
 538         }
 539         return tokens_[pos_++].character();
 540 }
 541
 542
 543 docstring Parser::getArg(char_type left, char_type right)
 544 {
 545         skipSpaces();
 546
 547         docstring result;
 548         char_type c = getChar();
 549
 550         if (c != left)
 551                 putback();
 552         else
 553                 while ((c = getChar()) != right && good())
 554                         result += c;
 555
 556         return result;
 557 }
 558
 559
 560 void Parser::skipSpaceTokens(idocstream & is, char_type c)
 561 {
 562         // skip trailing spaces
 563         while (catcode(c) == catSpace || catcode(c) == catNewline)
 564                 if (!is.get(c))
 565                         break;
 566         //lyxerr << "putting back: " << c << endl;
 567         is.putback(c);
 568 }
 569
 570
 571 void Parser::tokenize(istream & is)
 572 {
 573         // eat everything up to the next \end_inset or end of stream
 574         // and store it in s for further tokenization
 575         string s;
 576         char c;
 577         while (is.get(c)) {
 578                 s += c;
 579                 if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
 580                         s = s.substr(0, s.size() - 10);
 581                         break;
 582                 }
 583         }
 584         // Remove the space after \end_inset
 585         if (is.get(c) && c != ' ')
 586                 is.unget();
 587
 588         // tokenize buffer
 589         tokenize(from_utf8(s));
 590 }
 591
 592
 593 void Parser::tokenize(docstring const & buffer)
 594 {
 595         idocstringstream is(mode_ & Parse::VERBATIM
 596                         ? escapeSpecialChars(buffer, mode_ & Parse::TEXTMODE)
 597                         : buffer, ios::in | ios::binary);
 598
 599         char_type c;
 600         while (is.get(c)) {
 601                 //lyxerr << "reading c: " << c << endl;
 602
 603                 switch (catcode(c)) {
 604                         case catNewline: {
 605                                 ++lineno_;
 606                                 is.get(c);
 607                                 if (catcode(c) == catNewline)
 608                                         ; //push_back(Token("par"));
 609                                 else {
 610                                         push_back(Token('\n', catNewline));
 611                                         is.putback(c);
 612                                 }
 613                                 break;
 614                         }
 615
 616 /*
 617                         case catComment: {
 618                                 while (is.get(c) && catcode(c) != catNewline)
 619                                         ;
 620                                 ++lineno_;
 621                                 break;
 622                         }
 623 */
 624
 625                         case catEscape: {
 626                                 is.get(c);
 627                                 if (!is) {
 628                                         error("unexpected end of input");
 629                                 } else {
 630                                         if (c == '\n')
 631                                                 c = ' ';
 632                                         docstring s(1, c);
 633                                         if (catcode(c) == catLetter) {
 634                                                 // collect letters
 635                                                 while (is.get(c) && catcode(c) == catLetter)
 636                                                         s += c;
 637                                                 skipSpaceTokens(is, c);
 638                                         }
 639                                         push_back(Token(s));
 640                                 }
 641                                 break;
 642                         }
 643
 644                         case catSuper:
 645                         case catSub: {
 646                                 push_back(Token(c, catcode(c)));
 647                                 is.get(c);
 648                                 skipSpaceTokens(is, c);
 649                                 break;
 650                         }
 651
 652                         case catIgnore: {
 653                                 if (!(mode_ & Parse::QUIET))
 654                                         lyxerr << "ignoring a char: " << int(c) << endl;
 655                                 break;
 656                         }
 657
 658                         default:
 659                                 push_back(Token(c, catcode(c)));
 660                 }
 661         }
 662
 663 #ifdef FILEDEBUG
 664         dump();
 665 #endif
 666 }
 667
 668
 669 void Parser::dump() const
 670 {
 671         lyxerr << "\nTokens: ";
 672         for (unsigned i = 0; i < tokens_.size(); ++i) {
 673                 if (i == pos_)
 674                         lyxerr << " <#> ";
 675                 lyxerr << tokens_[i];
 676         }
 677         lyxerr << " pos: " << pos_ << endl;
 678 }
 679
 680
 681 void Parser::error(string const & msg)
 682 {
 683         success_ = false;
 684         if (!(mode_ & Parse::QUIET)) {
 685                 lyxerr << "Line ~" << lineno_ << ": Math parse error: "
 686                        << msg << endl;
 687                 dump();
 688         }
 689 }
 690
 691
 692 bool Parser::parse(MathAtom & at)
 693 {
 694         skipSpaces();
 695         MathData ar(buffer_);
 696         parse(ar, false, InsetMath::UNDECIDED_MODE);
 697         if (ar.size() != 1 || ar.front()->getType() == hullNone) {
 698                 if (!(mode_ & Parse::QUIET))
 699                         lyxerr << "unusual contents found: " << ar << endl;
 700                 at = MathAtom(new InsetMathPar(buffer_, ar));
 701                 //if (at->nargs() > 0)
 702                 //      at.nucleus()->cell(0) = ar;
 703                 //else
 704                 //      lyxerr << "unusual contents found: " << ar << endl;
 705                 success_ = false;
 706         } else
 707                 at = ar[0];
 708         return success_;
 709 }
 710
 711
 712 docstring Parser::parse_verbatim_option()
 713 {
 714         skipSpaces();
 715         docstring res;
 716         if (nextToken().character() == '[') {
 717                 Token t = getToken();
 718                 for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
 719                         if (t.cat() == catBegin) {
 720                                 putback();
 721                                 res += '{' + parse_verbatim_item() + '}';
 722                         } else
 723                                 res += t.asInput();
 724                 }
 725         }
 726         return res;
 727 }
 728
 729
 730 docstring Parser::parse_verbatim_item()
 731 {
 732         skipSpaces();
 733         docstring res;
 734         if (nextToken().cat() == catBegin) {
 735                 Token t = getToken();
 736                 for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
 737                         if (t.cat() == catBegin) {
 738                                 putback();
 739                                 res += '{' + parse_verbatim_item() + '}';
 740                         }
 741                         else
 742                                 res += t.asInput();
 743                 }
 744         }
 745         return res;
 746 }
 747
 748
 749 MathData Parser::parse(unsigned flags, mode_type mode)
 750 {
 751         MathData ar(buffer_);
 752         parse(ar, flags, mode);
 753         return ar;
 754 }
 755
 756
 757 bool Parser::parse(MathData & array, unsigned flags, mode_type mode)
 758 {
 759         InsetMathGrid grid(buffer_, 1, 1);
 760         parse1(grid, flags, mode, false);
 761         array = grid.cell(0);
 762         return success_;
 763 }
 764
 765
 766 void Parser::parse2(MathAtom & at, const unsigned flags, const mode_type mode,
 767         const bool numbered)
 768 {
 769         parse1(*(at.nucleus()->asGridInset()), flags, mode, numbered);
 770 }
 771
 772
 773 bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
 774         const mode_type mode, const bool numbered)
 775 {
 776         int limits = 0;
 777         InsetMathGrid::row_type cellrow = 0;
 778         InsetMathGrid::col_type cellcol = 0;
 779         MathData * cell = &grid.cell(grid.index(cellrow, cellcol));
 780         Buffer * buf = buffer_;
 781
 782         if (grid.asHullInset())
 783                 grid.asHullInset()->numbered(cellrow, numbered);
 784
 785         //dump();
 786         //lyxerr << " flags: " << flags << endl;
 787         //lyxerr << " mode: " << mode  << endl;
 788         //lyxerr << "grid: " << grid << endl;
 789
 790         while (good()) {
 791                 Token const & t = getToken();
 792
 793 #ifdef FILEDEBUG
 794                 lyxerr << "t: " << t << " flags: " << flags << endl;
 795                 lyxerr << "mode: " << mode  << endl;
 796                 cell->dump();
 797                 lyxerr << endl;
 798 #endif
 799
 800                 if (flags & FLAG_ITEM) {
 801
 802                         if (t.cat() == catBegin) {
 803                                 // skip the brace and collect everything to the next matching
 804                                 // closing brace
 805                                 parse1(grid, FLAG_BRACE_LAST, mode, numbered);
 806                                 return success_;
 807                         }
 808
 809                         // handle only this single token, leave the loop if done
 810                         flags = FLAG_LEAVE;
 811                 }
 812
 813
 814                 if (flags & FLAG_BRACED) {
 815                         if (t.cat() == catSpace)
 816                                 continue;
 817
 818                         if (t.cat() != catBegin) {
 819                                 error("opening brace expected");
 820                                 return success_;
 821                         }
 822
 823                         // skip the brace and collect everything to the next matching
 824                         // closing brace
 825                         flags = FLAG_BRACE_LAST;
 826                 }
 827
 828
 829                 if (flags & FLAG_OPTION) {
 830                         if (t.cat() == catOther && t.character() == '[') {
 831                                 MathData ar;
 832                                 parse(ar, FLAG_BRACK_LAST, mode);
 833                                 cell->append(ar);
 834                         } else {
 835                                 // no option found, put back token and we are done
 836                                 putback();
 837                         }
 838                         return success_;
 839                 }
 840
 841                 //
 842                 // cat codes
 843                 //
 844                 if (t.cat() == catMath) {
 845                         if (mode != InsetMath::MATH_MODE) {
 846                                 // we are inside some text mode thingy, so opening new math is allowed
 847                                 Token const & n = getToken();
 848                                 if (n.cat() == catMath) {
 849                                         // TeX's $$...$$ syntax for displayed math
 850                                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
 851                                         parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 852                                         getToken(); // skip the second '$' token
 853                                 } else {
 854                                         // simple $...$  stuff
 855                                         putback();
 856                                         if (mode == InsetMath::UNDECIDED_MODE) {
 857                                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
 858                                                 parse2(cell->back(), FLAG_SIMPLE, InsetMath::MATH_MODE, false);
 859                                         } else {
 860                                                 // Don't create nested math hulls (bug #5392)
 861                                                 cell->push_back(MathAtom(new InsetMathEnsureMath(buf)));
 862                                                 parse(cell->back().nucleus()->cell(0), FLAG_SIMPLE, InsetMath::MATH_MODE);
 863                                         }
 864                                 }
 865                         }
 866
 867                         else if (flags & FLAG_SIMPLE) {
 868                                 // this is the end of the formula
 869                                 return success_;
 870                         }
 871
 872                         else {
 873                                 error("something strange in the parser");
 874                                 break;
 875                         }
 876                 }
 877
 878                 else if (t.cat() == catLetter)
 879                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 880
 881                 else if (t.cat() == catSpace && mode != InsetMath::MATH_MODE) {
 882                         if (cell->empty() || cell->back()->getChar() != ' ')
 883                                 cell->push_back(MathAtom(new InsetMathChar(t.character())));
 884                 }
 885
 886                 else if (t.cat() == catNewline && mode != InsetMath::MATH_MODE) {
 887                         if (cell->empty() || cell->back()->getChar() != ' ')
 888                                 cell->push_back(MathAtom(new InsetMathChar(' ')));
 889                 }
 890
 891                 else if (t.cat() == catParameter) {
 892                         Token const & n = getToken();
 893                         cell->push_back(MathAtom(new MathMacroArgument(n.character()-'0')));
 894                 }
 895
 896                 else if (t.cat() == catActive)
 897                         cell->push_back(MathAtom(new InsetMathChar(t.character())));
 898
 899                 else if (t.cat() == catBegin) {
 900                         MathData ar;
 901                         parse(ar, FLAG_BRACE_LAST, mode);
 902                         // do not create a BraceInset if they were written by LyX
 903                         // this helps to keep the annoyance of  "a choose b"  to a minimum
 904                         if (ar.size() == 1 && ar[0]->extraBraces())
 905                                 cell->append(ar);
 906                         else
 907                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
 908                 }
 909
 910                 else if (t.cat() == catEnd) {
 911                         if (flags & FLAG_BRACE_LAST)
 912                                 return success_;
 913                         error("found '}' unexpectedly");
 914                         //LASSERT(false, /**/);
 915                         //add(cell, '}', LM_TC_TEX);
 916                 }
 917
 918                 else if (t.cat() == catAlign) {
 919                         //lyxerr << " column now " << (cellcol + 1)
 920                         //       << " max: " << grid.ncols() << endl;
 921                         if (flags & FLAG_ALIGN)
 922                                 return success_;
 923                         if (addCol(grid, cellcol))
 924                                 cell = &grid.cell(grid.index(cellrow, cellcol));
 925                 }
 926
 927                 else if (t.cat() == catSuper || t.cat() == catSub) {
 928                         bool up = (t.cat() == catSuper);
 929                         // we need no new script inset if the last thing was a scriptinset,
 930                         // which has that script already not the same script already
 931                         if (!cell->size())
 932                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 933                         else if (cell->back()->asScriptInset() &&
 934                                         !cell->back()->asScriptInset()->has(up))
 935                                 cell->back().nucleus()->asScriptInset()->ensure(up);
 936                         else if (cell->back()->asScriptInset())
 937                                 cell->push_back(MathAtom(new InsetMathScript(buf, up)));
 938                         else
 939                                 cell->back() = MathAtom(new InsetMathScript(buf, cell->back(), up));
 940                         InsetMathScript * p = cell->back().nucleus()->asScriptInset();
 941                         // special handling of {}-bases
 942                         // Here we could remove the brace inset for things
 943                         // like {a'}^2 and add the braces back in
 944                         // InsetMathScript::write().
 945                         // We do not do it, since it is not possible to detect
 946                         // reliably whether the braces are needed because the
 947                         // nucleus contains more than one symbol, or whether
 948                         // they are needed for unknown commands like \xx{a}_0
 949                         // or \yy{a}{b}_0. This was done in revision 14819
 950                         // in an unreliable way. See this thread
 951                         // http://www.mail-archive.com/lyx-devel%40lists.lyx.org/msg104917.html
 952                         // for more details.
 953                         // However, we remove empty braces because they look
 954                         // ugly on screen and we are sure that they were added
 955                         // by the write() method (and will be re-added on save).
 956                         if (p->nuc().size() == 1 &&
 957                             p->nuc().back()->asBraceInset() &&
 958                             p->nuc().back()->asBraceInset()->cell(0).empty())
 959                                 p->nuc().erase(0);
 960
 961                         parse(p->cell(p->idxOfScript(up)), FLAG_ITEM, mode);
 962                         if (limits) {
 963                                 p->limits(limits);
 964                                 limits = 0;
 965                         }
 966                 }
 967
 968                 else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
 969                         //lyxerr << "finished reading option" << endl;
 970                         return success_;
 971                 }
 972
 973                 else if (t.cat() == catOther) {
 974                         char_type c = t.character();
 975                         if (isAsciiOrMathAlpha(c)
 976                             || mode_ & Parse::VERBATIM
 977                             || !(mode_ & Parse::USETEXT)
 978                             || mode == InsetMath::TEXT_MODE) {
 979                                 cell->push_back(MathAtom(new InsetMathChar(c)));
 980                         } else {
 981                                 MathAtom at = createInsetMath("text", buf);
 982                                 at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 983                                 while (nextToken().cat() == catOther
 984                                        && !isAsciiOrMathAlpha(nextToken().character())) {
 985                                         c = getToken().character();
 986                                         at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
 987                                 }
 988                                 cell->push_back(at);
 989                         }
 990                 }
 991
 992                 else if (t.cat() == catComment) {
 993                         docstring s;
 994                         while (good()) {
 995                                 Token const & t = getToken();
 996                                 if (t.cat() == catNewline)
 997                                         break;
 998                                 s += t.asString();
 999                         }
1000                         cell->push_back(MathAtom(new InsetMathComment(buf, s)));
1001                         skipSpaces();
1002                 }
1003
1004                 //
1005                 // control sequences
1006                 //
1007
1008                 else if (t.cs() == "lyxlock") {
1009                         if (cell->size())
1010                                 cell->back().nucleus()->lock(true);
1011                 }
1012
1013                 else if ((t.cs() == "global" && nextToken().cs() == "def") ||
1014                          t.cs() == "def") {
1015                         if (t.cs() == "global")
1016                                 getToken();
1017
1018                         // get name
1019                         docstring name = getToken().cs();
1020
1021                         // read parameters
1022                         int nargs = 0;
1023                         docstring pars;
1024                         while (good() && nextToken().cat() != catBegin) {
1025                                 pars += getToken().cs();
1026                                 ++nargs;
1027                         }
1028                         nargs /= 2;
1029
1030                         // read definition
1031                         MathData def;
1032                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1033
1034                         // is a version for display attached?
1035                         skipSpaces();
1036                         MathData display;
1037                         if (nextToken().cat() == catBegin)
1038                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1039
1040                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1041                                 name, nargs, 0, MacroTypeDef,
1042                                 vector<MathData>(), def, display)));
1043
1044                         if (buf && (mode_ & Parse::TRACKMACRO))
1045                                 buf->usermacros.insert(name);
1046                 }
1047
1048                 else if (t.cs() == "newcommand" ||
1049                          t.cs() == "renewcommand" ||
1050                          t.cs() == "newlyxcommand") {
1051                         // get name
1052                         if (getToken().cat() != catBegin) {
1053                                 error("'{' in \\newcommand expected (1) ");
1054                                 return success_;
1055                         }
1056                         docstring name = getToken().cs();
1057                         if (getToken().cat() != catEnd) {
1058                                 error("'}' in \\newcommand expected");
1059                                 return success_;
1060                         }
1061
1062                         // get arity
1063                         docstring const arg = getArg('[', ']');
1064                         int nargs = 0;
1065                         if (!arg.empty())
1066                                 nargs = convert<int>(arg);
1067
1068                         // optional argument given?
1069                         skipSpaces();
1070                         int optionals = 0;
1071                         vector<MathData> optionalValues;
1072                         while (nextToken().character() == '[') {
1073                                 getToken();
1074                                 optionalValues.push_back(MathData());
1075                                 parse(optionalValues[optionals], FLAG_BRACK_LAST, mode);
1076                                 ++optionals;
1077                         }
1078
1079                         MathData def;
1080                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1081
1082                         // is a version for display attached?
1083                         skipSpaces();
1084                         MathData display;
1085                         if (nextToken().cat() == catBegin)
1086                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1087
1088                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1089                                 name, nargs, optionals, MacroTypeNewcommand,
1090                                 optionalValues, def, display)));
1091
1092                         if (buf && (mode_ & Parse::TRACKMACRO))
1093                                 buf->usermacros.insert(name);
1094                 }
1095
1096                 else if (t.cs() == "newcommandx" ||
1097                          t.cs() == "renewcommandx") {
1098                         // \newcommandx{\foo}[2][usedefault, addprefix=\global,1=default]{#1,#2}
1099                         // get name
1100                         docstring name;
1101                         if (nextToken().cat() == catBegin) {
1102                                 getToken();
1103                                 name = getToken().cs();
1104                                 if (getToken().cat() != catEnd) {
1105                                         error("'}' in \\newcommandx expected");
1106                                         return success_;
1107                                 }
1108                         } else
1109                                 name = getToken().cs();
1110
1111                         // get arity
1112                         docstring const arg = getArg('[', ']');
1113                         if (arg.empty()) {
1114                                 error("[num] in \\newcommandx expected");
1115                                 return success_;
1116                         }
1117                         int nargs = convert<int>(arg);
1118
1119                         // get options
1120                         int optionals = 0;
1121                         vector<MathData> optionalValues;
1122                         if (nextToken().character() == '[') {
1123                                 // skip '['
1124                                 getToken();
1125
1126                                 // handle 'opt=value' options, separated by ','.
1127                                 skipSpaces();
1128                                 while (nextToken().character() != ']' && good()) {
1129                                         if (nextToken().character() >= '1'
1130                                             && nextToken().character() <= '9') {
1131                                                 // optional value -> get parameter number
1132                                                 int n = getChar() - '0';
1133                                                 if (n > nargs) {
1134                                                         error("Arity of \\newcommandx too low "
1135                                                               "for given optional parameter.");
1136                                                         return success_;
1137                                                 }
1138
1139                                                 // skip '='
1140                                                 if (getToken().character() != '=') {
1141                                                         error("'=' and optional parameter value "
1142                                                               "expected for \\newcommandx");
1143                                                         return success_;
1144                                                 }
1145
1146                                                 // get value
1147                                                 int optNum = max(size_t(n), optionalValues.size());
1148                                                 optionalValues.resize(optNum);
1149                                                 optionalValues[n - 1].clear();
1150                                                 while (nextToken().character() != ']'
1151                                                        && nextToken().character() != ',') {
1152                                                         MathData data;
1153                                                         parse(data, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1154                                                         optionalValues[n - 1].append(data);
1155                                                 }
1156                                                 optionals = max(n, optionals);
1157                                         } else if (nextToken().cat() == catLetter) {
1158                                                 // we in fact ignore every non-optional
1159                                                 // parameter
1160
1161                                                 // get option name
1162                                                 docstring opt;
1163                                                 while (nextToken().cat() == catLetter)
1164                                                         opt += getChar();
1165
1166                                                 // value?
1167                                                 skipSpaces();
1168                                                 MathData value;
1169                                                 if (nextToken().character() == '=') {
1170                                                         getToken();
1171                                                         while (nextToken().character() != ']'
1172                                                                 && nextToken().character() != ',')
1173                                                                 parse(value, FLAG_ITEM,
1174                                                                       InsetMath::UNDECIDED_MODE);
1175                                                 }
1176                                         } else {
1177                                                 error("option for \\newcommandx expected");
1178                                                 return success_;
1179                                         }
1180
1181                                         // skip komma
1182                                         skipSpaces();
1183                                         if (nextToken().character() == ',') {
1184                                                 getChar();
1185                                                 skipSpaces();
1186                                         } else if (nextToken().character() != ']') {
1187                                                 error("Expecting ',' or ']' in options "
1188                                                       "of \\newcommandx");
1189                                                 return success_;
1190                                         }
1191                                 }
1192
1193                                 // skip ']'
1194                                 if (!good())
1195                                         return success_;
1196                                 getToken();
1197                         }
1198
1199                         // get definition
1200                         MathData def;
1201                         parse(def, FLAG_ITEM, InsetMath::UNDECIDED_MODE);
1202
1203                         // is a version for display attached?
1204                         skipSpaces();
1205                         MathData display;
1206                         if (nextToken().cat() == catBegin)
1207                                 parse(display, FLAG_ITEM, InsetMath::MATH_MODE);
1208
1209                         cell->push_back(MathAtom(new MathMacroTemplate(buf,
1210                                 name, nargs, optionals, MacroTypeNewcommandx,
1211                                 optionalValues, def, display)));
1212
1213                         if (buf && (mode_ & Parse::TRACKMACRO))
1214                                 buf->usermacros.insert(name);
1215                 }
1216
1217                 else if (t.cs() == "(") {
1218                         if (mode == InsetMath::MATH_MODE) {
1219                                 error("bad math environment");
1220                                 break;
1221                         }
1222                         cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1223                         parse2(cell->back(), FLAG_SIMPLE2, InsetMath::MATH_MODE, false);
1224                 }
1225
1226                 else if (t.cs() == "[") {
1227                         if (mode != InsetMath::UNDECIDED_MODE) {
1228                                 error("bad math environment");
1229                                 break;
1230                         }
1231                         cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1232                         parse2(cell->back(), FLAG_EQUATION, InsetMath::MATH_MODE, false);
1233                 }
1234
1235                 else if (t.cs() == "protect")
1236                         // ignore \\protect, will hopefully be re-added during output
1237                         ;
1238
1239                 else if (t.cs() == "end") {
1240                         if (flags & FLAG_END) {
1241                                 // eat environment name
1242                                 docstring const name = getArg('{', '}');
1243                                 if (environments_.empty())
1244                                         error("'found \\end{" + name +
1245                                               "}' without matching '\\begin{" +
1246                                               name + "}'");
1247                                 else if (name != environments_.back())
1248                                         error("'\\end{" + name +
1249                                               "}' does not match '\\begin{" +
1250                                               environments_.back() + "}'");
1251                                 else {
1252                                         environments_.pop_back();
1253                                         // Delete empty last row in matrix
1254                                         // like insets.
1255                                         // If you abuse InsetMathGrid for
1256                                         // non-matrix like structures you
1257                                         // probably need to refine this test.
1258                                         // Right now we only have to test for
1259                                         // single line hull insets.
1260                                         if (grid.nrows() > 1 && innerHull(name))
1261                                                 delEmptyLastRow(grid);
1262                                         return success_;
1263                                 }
1264                         } else
1265                                 error("found 'end' unexpectedly");
1266                 }
1267
1268                 else if (t.cs() == ")") {
1269                         if (flags & FLAG_SIMPLE2)
1270                                 return success_;
1271                         error("found '\\)' unexpectedly");
1272                 }
1273
1274                 else if (t.cs() == "]") {
1275                         if (flags & FLAG_EQUATION)
1276                                 return success_;
1277                         error("found '\\]' unexpectedly");
1278                 }
1279
1280                 else if (t.cs() == "\\") {
1281                         if (flags & FLAG_ALIGN)
1282                                 return success_;
1283                         bool added = false;
1284                         if (nextToken().asInput() == "*") {
1285                                 getToken();
1286                                 added = addRow(grid, cellrow, docstring(), false);
1287                         } else if (good())
1288                                 added = addRow(grid, cellrow, getArg('[', ']'));
1289                         else
1290                                 error("missing token after \\\\");
1291                         if (added) {
1292                                 cellcol = 0;
1293                                 if (grid.asHullInset())
1294                                         grid.asHullInset()->numbered(
1295                                                         cellrow, numbered);
1296                                 cell = &grid.cell(grid.index(cellrow,
1297                                                              cellcol));
1298                         }
1299                 }
1300
1301 #if 0
1302                 else if (t.cs() == "multicolumn") {
1303                         // extract column count and insert dummy cells
1304                         MathData count;
1305                         parse(count, FLAG_ITEM, mode);
1306                         int cols = 1;
1307                         if (!extractNumber(count, cols)) {
1308                                 success_ = false;
1309                                 lyxerr << " can't extract number of cells from " << count << endl;
1310                         }
1311                         // resize the table if necessary
1312                         for (int i = 0; i < cols; ++i) {
1313                                 if (addCol(grid, cellcol)) {
1314                                         cell = &grid.cell(grid.index(
1315                                                         cellrow, cellcol));
1316                                         // mark this as dummy
1317                                         grid.cellinfo(grid.index(
1318                                                 cellrow, cellcol)).dummy_ = true;
1319                                 }
1320                         }
1321                         // the last cell is the real thing, not a dummy
1322                         grid.cellinfo(grid.index(cellrow, cellcol)).dummy_ = false;
1323
1324                         // read special alignment
1325                         MathData align;
1326                         parse(align, FLAG_ITEM, mode);
1327                         //grid.cellinfo(grid.index(cellrow, cellcol)).align_ = extractString(align);
1328
1329                         // parse the remaining contents into the "real" cell
1330                         parse(*cell, FLAG_ITEM, mode);
1331                 }
1332 #endif
1333
1334                 else if (t.cs() == "limits" || t.cs() == "nolimits") {
1335                         CatCode cat = nextToken().cat();
1336                         if (cat == catSuper || cat == catSub)
1337                                 limits = t.cs() == "limits" ? 1 : -1;
1338                         else {
1339                                 MathAtom at = createInsetMath(t.cs(), buf);
1340                                 cell->push_back(at);
1341                         }
1342                 }
1343
1344                 else if (t.cs() == "nonumber") {
1345                         if (grid.asHullInset())
1346                                 grid.asHullInset()->numbered(cellrow, false);
1347                 }
1348
1349                 else if (t.cs() == "number") {
1350                         if (grid.asHullInset())
1351                                 grid.asHullInset()->numbered(cellrow, true);
1352                 }
1353
1354                 else if (t.cs() == "hline") {
1355                         grid.rowinfo(cellrow).lines_ ++;
1356                 }
1357
1358                 else if (t.cs() == "sqrt") {
1359                         MathData ar;
1360                         parse(ar, FLAG_OPTION, mode);
1361                         if (ar.size()) {
1362                                 cell->push_back(MathAtom(new InsetMathRoot(buf)));
1363                                 cell->back().nucleus()->cell(0) = ar;
1364                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1365                         } else {
1366                                 cell->push_back(MathAtom(new InsetMathSqrt(buf)));
1367                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1368                         }
1369                 }
1370
1371                 else if (t.cs() == "unit") {
1372                         // Allowed formats \unit[val]{unit}
1373                         MathData ar;
1374                         parse(ar, FLAG_OPTION, mode);
1375                         if (ar.size()) {
1376                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT)));
1377                                 cell->back().nucleus()->cell(0) = ar;
1378                                 parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1379                         } else {
1380                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT, 1)));
1381                                 parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1382                         }
1383                 }
1384
1385                 else if (t.cs() == "unitfrac") {
1386                         // Here allowed formats are \unitfrac[val]{num}{denom}
1387                         MathData ar;
1388                         parse(ar, FLAG_OPTION, mode);
1389                         if (ar.size()) {
1390                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC, 3)));
1391                                 cell->back().nucleus()->cell(2) = ar;
1392                         } else {
1393                                 cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC)));
1394                         }
1395                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1396                         parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1397                 }
1398
1399                 else if (t.cs() == "cfrac") {
1400                         // allowed formats are \cfrac[pos]{num}{denom}
1401                         docstring const arg = getArg('[', ']');
1402                         //lyxerr << "got so far: '" << arg << "'" << endl;
1403                                 if (arg == "l")
1404                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT)));
1405                                 else if (arg == "r")
1406                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT)));
1407                                 else if (arg.empty() || arg == "c")
1408                                         cell->push_back(MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRAC)));
1409                                 else {
1410                                         error("found invalid optional argument");
1411                                         break;
1412                                 }
1413                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1414                         parse(cell->back().nucleus()->cell(1), FLAG_ITEM, mode);
1415                 }
1416
1417                 else if (t.cs() == "xrightarrow" || t.cs() == "xleftarrow") {
1418                         cell->push_back(createInsetMath(t.cs(), buf));
1419                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, mode);
1420                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, mode);
1421                 }
1422
1423                 else if (t.cs() == "ref" || t.cs() == "eqref" || t.cs() == "prettyref"
1424                           || t.cs() == "pageref" || t.cs() == "vpageref" || t.cs() == "vref") {
1425                         cell->push_back(MathAtom(new InsetMathRef(buf, t.cs())));
1426                         docstring const opt = parse_verbatim_option();
1427                         docstring const ref = parse_verbatim_item();
1428                         if (!opt.empty()) {
1429                                 cell->back().nucleus()->cell(1).push_back(
1430                                         MathAtom(new InsetMathString(opt)));
1431                         }
1432                         cell->back().nucleus()->cell(0).push_back(
1433                                         MathAtom(new InsetMathString(ref)));
1434                 }
1435
1436                 else if (t.cs() == "left") {
1437                         skipSpaces();
1438                         Token const & tl = getToken();
1439                         // \| and \Vert are equivalent, and InsetMathDelim
1440                         // can't handle \|
1441                         // FIXME: fix this in InsetMathDelim itself!
1442                         docstring const l = tl.cs() == "|" ? from_ascii("Vert") : tl.asString();
1443                         MathData ar;
1444                         parse(ar, FLAG_RIGHT, mode);
1445                         if (!good())
1446                                 break;
1447                         skipSpaces();
1448                         Token const & tr = getToken();
1449                         docstring const r = tr.cs() == "|" ? from_ascii("Vert") : tr.asString();
1450                         cell->push_back(MathAtom(new InsetMathDelim(buf, l, r, ar)));
1451                 }
1452
1453                 else if (t.cs() == "right") {
1454                         if (flags & FLAG_RIGHT)
1455                                 return success_;
1456                         //lyxerr << "got so far: '" << cell << "'" << endl;
1457                         error("Unmatched right delimiter");
1458                         return success_;
1459                 }
1460
1461                 else if (t.cs() == "begin") {
1462                         docstring const name = getArg('{', '}');
1463                         environments_.push_back(name);
1464
1465                         if (name == "array" || name == "subarray") {
1466                                 docstring const valign = parse_verbatim_option() + 'c';
1467                                 docstring const halign = parse_verbatim_item();
1468                                 cell->push_back(MathAtom(new InsetMathArray(buf, name,
1469                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1470                                 parse2(cell->back(), FLAG_END, mode, false);
1471                         }
1472
1473                         else if (name == "tabular") {
1474                                 docstring const valign = parse_verbatim_option() + 'c';
1475                                 docstring const halign = parse_verbatim_item();
1476                                 cell->push_back(MathAtom(new InsetMathTabular(buf, name,
1477                                         InsetMathGrid::guessColumns(halign), 1, (char)valign[0], halign)));
1478                                 parse2(cell->back(), FLAG_END, InsetMath::TEXT_MODE, false);
1479                         }
1480
1481                         else if (name == "split" || name == "cases") {
1482                                 cell->push_back(createInsetMath(name, buf));
1483                                 parse2(cell->back(), FLAG_END, mode, false);
1484                         }
1485
1486                         else if (name == "alignedat") {
1487                                 docstring const valign = parse_verbatim_option() + 'c';
1488                                 // ignore this for a while
1489                                 getArg('{', '}');
1490                                 cell->push_back(MathAtom(new InsetMathSplit(buf, name, (char)valign[0])));
1491                                 parse2(cell->back(), FLAG_END, mode, false);
1492                         }
1493
1494                         else if (name == "math") {
1495                                 if (mode == InsetMath::MATH_MODE) {
1496                                         error("bad math environment");
1497                                         break;
1498                                 }
1499                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullSimple)));
1500                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, true);
1501                         }
1502
1503                         else if (name == "equation" || name == "equation*"
1504                                         || name == "displaymath") {
1505                                 if (mode != InsetMath::UNDECIDED_MODE) {
1506                                         error("bad math environment");
1507                                         break;
1508                                 }
1509                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEquation)));
1510                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, (name == "equation"));
1511                         }
1512
1513                         else if (name == "eqnarray" || name == "eqnarray*") {
1514                                 if (mode != InsetMath::UNDECIDED_MODE) {
1515                                         error("bad math environment");
1516                                         break;
1517                                 }
1518                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullEqnArray)));
1519                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1520                         }
1521
1522                         else if (name == "align" || name == "align*") {
1523                                 if (mode != InsetMath::UNDECIDED_MODE) {
1524                                         error("bad math environment");
1525                                         break;
1526                                 }
1527                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlign)));
1528                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1529                         }
1530
1531                         else if (name == "flalign" || name == "flalign*") {
1532                                 if (mode != InsetMath::UNDECIDED_MODE) {
1533                                         error("bad math environment");
1534                                         break;
1535                                 }
1536                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullFlAlign)));
1537                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1538                         }
1539
1540                         else if (name == "alignat" || name == "alignat*") {
1541                                 if (mode != InsetMath::UNDECIDED_MODE) {
1542                                         error("bad math environment");
1543                                         break;
1544                                 }
1545                                 // ignore this for a while
1546                                 getArg('{', '}');
1547                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullAlignAt)));
1548                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1549                         }
1550
1551                         else if (name == "xalignat" || name == "xalignat*") {
1552                                 if (mode != InsetMath::UNDECIDED_MODE) {
1553                                         error("bad math environment");
1554                                         break;
1555                                 }
1556                                 // ignore this for a while
1557                                 getArg('{', '}');
1558                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXAlignAt)));
1559                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1560                         }
1561
1562                         else if (name == "xxalignat") {
1563                                 if (mode != InsetMath::UNDECIDED_MODE) {
1564                                         error("bad math environment");
1565                                         break;
1566                                 }
1567                                 // ignore this for a while
1568                                 getArg('{', '}');
1569                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullXXAlignAt)));
1570                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1571                         }
1572
1573                         else if (name == "multline" || name == "multline*") {
1574                                 if (mode != InsetMath::UNDECIDED_MODE) {
1575                                         error("bad math environment");
1576                                         break;
1577                                 }
1578                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullMultline)));
1579                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1580                         }
1581
1582                         else if (name == "gather" || name == "gather*") {
1583                                 if (mode != InsetMath::UNDECIDED_MODE) {
1584                                         error("bad math environment");
1585                                         break;
1586                                 }
1587                                 cell->push_back(MathAtom(new InsetMathHull(buf, hullGather)));
1588                                 parse2(cell->back(), FLAG_END, InsetMath::MATH_MODE, !stared(name));
1589                         }
1590
1591                         else if (latexkeys const * l = in_word_set(name)) {
1592                                 if (l->inset == "matrix") {
1593                                         cell->push_back(createInsetMath(name, buf));
1594                                         parse2(cell->back(), FLAG_END, mode, false);
1595                                 } else if (l->inset == "split") {
1596                                         docstring const valign = parse_verbatim_option() + 'c';
1597                                         cell->push_back(MathAtom(
1598                                                 new InsetMathSplit(buf, name, (char)valign[0])));
1599                                         parse2(cell->back(), FLAG_END, mode, false);
1600                                 } else {
1601                                         success_ = false;
1602                                         if (!(mode_ & Parse::QUIET)) {
1603                                                 dump();
1604                                                 lyxerr << "found math environment `"
1605                                                        << to_utf8(name)
1606                                                        << "' in symbols file with unsupported inset `"
1607                                                        << to_utf8(l->inset)
1608                                                        << "'." << endl;
1609                                         }
1610                                         // create generic environment inset
1611                                         cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1612                                         parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1613                                 }
1614                         }
1615
1616                         else {
1617                                 success_ = false;
1618                                 if (!(mode_ & Parse::QUIET)) {
1619                                         dump();
1620                                         lyxerr << "found unknown math environment '"
1621                                                << to_utf8(name) << "'" << endl;
1622                                 }
1623                                 // create generic environment inset
1624                                 cell->push_back(MathAtom(new InsetMathEnv(buf, name)));
1625                                 parse(cell->back().nucleus()->cell(0), FLAG_END, mode);
1626                         }
1627                 }
1628
1629                 else if (t.cs() == "kern") {
1630                         // FIXME: A hack...
1631                         docstring s;
1632                         int num_tokens = 0;
1633                         while (true) {
1634                                 Token const & t = getToken();
1635                                 ++num_tokens;
1636                                 if (!good()) {
1637                                         s.clear();
1638                                         while (num_tokens--)
1639                                                 putback();
1640                                         break;
1641                                 }
1642                                 s += t.character();
1643                                 if (isValidLength(to_utf8(s)))
1644                                         break;
1645                         }
1646                         if (s.empty())
1647                                 cell->push_back(MathAtom(new InsetMathKern));
1648                         else
1649                                 cell->push_back(MathAtom(new InsetMathKern(s)));
1650                 }
1651
1652                 else if (t.cs() == "label") {
1653                         // FIXME: This is swallowed in inline formulas
1654                         docstring label = parse_verbatim_item();
1655                         MathData ar;
1656                         asArray(label, ar);
1657                         if (grid.asHullInset()) {
1658                                 grid.asHullInset()->label(cellrow, label);
1659                         } else {
1660                                 cell->push_back(createInsetMath(t.cs(), buf));
1661                                 cell->push_back(MathAtom(new InsetMathBrace(ar)));
1662                         }
1663                 }
1664
1665                 else if (t.cs() == "choose" || t.cs() == "over"
1666                                 || t.cs() == "atop" || t.cs() == "brace"
1667                                 || t.cs() == "brack") {
1668                         MathAtom at = createInsetMath(t.cs(), buf);
1669                         at.nucleus()->cell(0) = *cell;
1670                         cell->clear();
1671                         parse(at.nucleus()->cell(1), flags, mode);
1672                         cell->push_back(at);
1673                         return success_;
1674                 }
1675
1676                 else if (t.cs() == "color") {
1677                         docstring const color = parse_verbatim_item();
1678                         cell->push_back(MathAtom(new InsetMathColor(buf, true, color)));
1679                         parse(cell->back().nucleus()->cell(0), flags, mode);
1680                         return success_;
1681                 }
1682
1683                 else if (t.cs() == "textcolor") {
1684                         docstring const color = parse_verbatim_item();
1685                         cell->push_back(MathAtom(new InsetMathColor(buf, false, color)));
1686                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1687                 }
1688
1689                 else if (t.cs() == "normalcolor") {
1690                         cell->push_back(createInsetMath(t.cs(), buf));
1691                         parse(cell->back().nucleus()->cell(0), flags, mode);
1692                         return success_;
1693                 }
1694
1695                 else if (t.cs() == "substack") {
1696                         cell->push_back(createInsetMath(t.cs(), buf));
1697                         parse2(cell->back(), FLAG_ITEM, mode, false);
1698                         // Delete empty last row if present
1699                         InsetMathGrid & subgrid =
1700                                 *(cell->back().nucleus()->asGridInset());
1701                         if (subgrid.nrows() > 1)
1702                                 delEmptyLastRow(subgrid);
1703                 }
1704
1705                 else if (t.cs() == "xymatrix") {
1706                         odocstringstream os;
1707                         while (good() && nextToken().cat() != catBegin)
1708                                 os << getToken().asInput();
1709                         cell->push_back(createInsetMath(t.cs() + os.str(), buf));
1710                         parse2(cell->back(), FLAG_ITEM, mode, false);
1711                         // Delete empty last row if present
1712                         InsetMathGrid & subgrid =
1713                                 *(cell->back().nucleus()->asGridInset());
1714                         if (subgrid.nrows() > 1)
1715                                 delEmptyLastRow(subgrid);
1716                 }
1717
1718                 else if (t.cs() == "framebox" || t.cs() == "makebox") {
1719                         cell->push_back(createInsetMath(t.cs(), buf));
1720                         parse(cell->back().nucleus()->cell(0), FLAG_OPTION, InsetMath::TEXT_MODE);
1721                         parse(cell->back().nucleus()->cell(1), FLAG_OPTION, InsetMath::TEXT_MODE);
1722                         parse(cell->back().nucleus()->cell(2), FLAG_ITEM, InsetMath::TEXT_MODE);
1723                 }
1724
1725                 else if (t.cs() == "tag") {
1726                         if (nextToken().character() == '*') {
1727                                 getToken();
1728                                 cell->push_back(createInsetMath(t.cs() + '*', buf));
1729                         } else
1730                                 cell->push_back(createInsetMath(t.cs(), buf));
1731                         parse(cell->back().nucleus()->cell(0), FLAG_ITEM, InsetMath::TEXT_MODE);
1732                 }
1733
1734                 else if (t.cs() == "hspace" && nextToken().character() != '*') {
1735                         docstring const name = t.cs();
1736                         docstring const arg = parse_verbatim_item();
1737                         Length length;
1738                         if (isValidLength(to_utf8(arg), &length))
1739                                 cell->push_back(MathAtom(new InsetMathSpace(length)));
1740                         else {
1741                                 // Since the Length class cannot use length variables
1742                                 // we must not create an InsetMathSpace.
1743                                 cell->push_back(MathAtom(new MathMacro(buf, name)));
1744                                 MathData ar;
1745                                 mathed_parse_cell(ar, '{' + arg + '}', mode_);
1746                                 cell->append(ar);
1747                         }
1748                 }
1749
1750 #if 0
1751                 else if (t.cs() == "infer") {
1752                         MathData ar;
1753                         parse(ar, FLAG_OPTION, mode);
1754                         cell->push_back(createInsetMath(t.cs(), buf));
1755                         parse2(cell->back(), FLAG_ITEM, mode, false);
1756                 }
1757
1758                 // Disabled
1759                 else if (1 && t.cs() == "ar") {
1760                         auto_ptr<InsetMathXYArrow> p(new InsetMathXYArrow);
1761                         // try to read target
1762                         parse(p->cell(0), FLAG_OTPTION, mode);
1763                         // try to read label
1764                         if (nextToken().cat() == catSuper || nextToken().cat() == catSub) {
1765                                 p->up_ = nextToken().cat() == catSuper;
1766                                 getToken();
1767                                 parse(p->cell(1), FLAG_ITEM, mode);
1768                                 //lyxerr << "read label: " << p->cell(1) << endl;
1769                         }
1770
1771                         cell->push_back(MathAtom(p.release()));
1772                         //lyxerr << "read cell: " << cell << endl;
1773                 }
1774 #endif
1775
1776                 else if (t.cs() == "lyxmathsym") {
1777                         skipSpaces();
1778                         if (getToken().cat() != catBegin) {
1779                                 error("'{' expected in \\" + t.cs());
1780                                 return success_;
1781                         }
1782                         int count = 0;
1783                         docstring cmd;
1784                         CatCode cat = nextToken().cat();
1785                         while (good() && (count || cat != catEnd)) {
1786                                 if (cat == catBegin)
1787                                         ++count;
1788                                 else if (cat == catEnd)
1789                                         --count;
1790                                 cmd += getToken().asInput();
1791                                 cat = nextToken().cat();
1792                         }
1793                         if (getToken().cat() != catEnd) {
1794                                 error("'}' expected in \\" + t.cs());
1795                                 return success_;
1796                         }
1797                         docstring rem;
1798                         do {
1799                                 cmd = Encodings::fromLaTeXCommand(cmd, rem);
1800                                 for (size_t i = 0; i < cmd.size(); ++i)
1801                                         cell->push_back(MathAtom(new InsetMathChar(cmd[i])));
1802                                 if (rem.size()) {
1803                                         char_type c = rem[0];
1804                                         cell->push_back(MathAtom(new InsetMathChar(c)));
1805                                         cmd = rem.substr(1);
1806                                         rem.clear();
1807                                 } else
1808                                         cmd.clear();
1809                         } while (cmd.size());
1810                 }
1811
1812                 else if (t.cs().size()) {
1813                         bool const no_mhchem =
1814                                 (t.cs() == "ce" || t.cs() == "cf") && buf
1815                                 && buf->params().use_mhchem == BufferParams::package_off;
1816                         bool const is_user_macro = no_mhchem ||
1817                                 (buf && (mode_ & Parse::TRACKMACRO
1818                                         ? buf->usermacros.count(t.cs()) != 0
1819                                         : buf->getMacro(t.cs(), false) != 0));
1820                         latexkeys const * l = in_word_set(t.cs());
1821                         if (l && !is_user_macro) {
1822                                 if (l->inset == "big") {
1823                                         skipSpaces();
1824                                         docstring const delim = getToken().asInput();
1825                                         if (InsetMathBig::isBigInsetDelim(delim))
1826                                                 cell->push_back(MathAtom(
1827                                                         new InsetMathBig(t.cs(), delim)));
1828                                         else {
1829                                                 cell->push_back(createInsetMath(t.cs(), buf));
1830                                                 putback();
1831                                         }
1832                                 }
1833
1834                                 else if (l->inset == "font") {
1835                                         cell->push_back(createInsetMath(t.cs(), buf));
1836                                         parse(cell->back().nucleus()->cell(0),
1837                                                 FLAG_ITEM, asMode(mode, l->extra));
1838                                 }
1839
1840                                 else if (l->inset == "oldfont") {
1841                                         cell->push_back(createInsetMath(t.cs(), buf));
1842                                         parse(cell->back().nucleus()->cell(0),
1843                                                 flags | FLAG_ALIGN, asMode(mode, l->extra));
1844                                         if (prevToken().cat() != catAlign &&
1845                                             prevToken().cs() != "\\")
1846                                                 return success_;
1847                                         putback();
1848                                 }
1849
1850                                 else if (l->inset == "style") {
1851                                         cell->push_back(createInsetMath(t.cs(), buf));
1852                                         parse(cell->back().nucleus()->cell(0),
1853                                                 flags | FLAG_ALIGN, mode);
1854                                         if (prevToken().cat() != catAlign &&
1855                                             prevToken().cs() != "\\")
1856                                                 return success_;
1857                                         putback();
1858                                 }
1859
1860                                 else {
1861                                         MathAtom at = createInsetMath(t.cs(), buf);
1862                                         for (InsetMath::idx_type i = 0; i < at->nargs(); ++i)
1863                                                 parse(at.nucleus()->cell(i),
1864                                                         FLAG_ITEM, asMode(mode, l->extra));
1865                                         cell->push_back(at);
1866                                 }
1867                         }
1868
1869                         else {
1870                                 bool is_unicode_symbol = false;
1871                                 if (mode == InsetMath::TEXT_MODE && !is_user_macro) {
1872                                         int num_tokens = 0;
1873                                         docstring cmd = prevToken().asInput();
1874                                         CatCode cat = nextToken().cat();
1875                                         if (cat == catBegin) {
1876                                                 int count = 0;
1877                                                 while (good() && (count || cat != catEnd)) {
1878                                                         cat = nextToken().cat();
1879                                                         cmd += getToken().asInput();
1880                                                         ++num_tokens;
1881                                                         if (cat == catBegin)
1882                                                                 ++count;
1883                                                         else if (cat == catEnd)
1884                                                                 --count;
1885                                                 }
1886                                         }
1887                                         bool is_combining;
1888                                         char_type c =
1889                                                 Encodings::fromLaTeXCommand(cmd, is_combining);
1890                                         if (is_combining) {
1891                                                 if (cat == catLetter)
1892                                                         cmd += '{';
1893                                                 cmd += getToken().asInput();
1894                                                 ++num_tokens;
1895                                                 if (cat == catLetter)
1896                                                         cmd += '}';
1897                                                 c = Encodings::fromLaTeXCommand(cmd, is_combining);
1898                                         }
1899                                         if (c) {
1900                                                 is_unicode_symbol = true;
1901                                                 cell->push_back(MathAtom(new InsetMathChar(c)));
1902                                         } else {
1903                                                 while (num_tokens--)
1904                                                         putback();
1905                                         }
1906                                 }
1907                                 if (!is_unicode_symbol) {
1908                                         MathAtom at = is_user_macro ?
1909                                                 MathAtom(new MathMacro(buf, t.cs()))
1910                                                 : createInsetMath(t.cs(), buf);
1911                                         InsetMath::mode_type m = mode;
1912                                         //if (m == InsetMath::UNDECIDED_MODE)
1913                                         //lyxerr << "default creation: m1: " << m << endl;
1914                                         if (at->currentMode() != InsetMath::UNDECIDED_MODE)
1915                                                 m = at->currentMode();
1916                                         //lyxerr << "default creation: m2: " << m << endl;
1917                                         InsetMath::idx_type start = 0;
1918                                         // this fails on \bigg[...\bigg]
1919                                         //MathData opt;
1920                                         //parse(opt, FLAG_OPTION, InsetMath::VERBATIM_MODE);
1921                                         //if (opt.size()) {
1922                                         //      start = 1;
1923                                         //      at.nucleus()->cell(0) = opt;
1924                                         //}
1925                                         for (InsetMath::idx_type i = start; i < at->nargs(); ++i) {
1926                                                 parse(at.nucleus()->cell(i), FLAG_ITEM, m);
1927                                                 skipSpaces();
1928                                         }
1929                                         cell->push_back(at);
1930                                 }
1931                         }
1932                 }
1933
1934
1935                 if (flags & FLAG_LEAVE) {
1936                         flags &= ~FLAG_LEAVE;
1937                         break;
1938                 }
1939         }
1940         return success_;
1941 }
1942
1943
1944
1945 } // anonymous namespace
1946
1947
1948 bool mathed_parse_cell(MathData & ar, docstring const & str, Parse::flags f)
1949 {
1950         return Parser(str, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1951                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1952 }
1953
1954
1955 bool mathed_parse_cell(MathData & ar, istream & is, Parse::flags f)
1956 {
1957         return Parser(is, f, ar.buffer()).parse(ar, 0, f & Parse::TEXTMODE ?
1958                                 InsetMath::TEXT_MODE : InsetMath::MATH_MODE);
1959 }
1960
1961
1962 bool mathed_parse_normal(Buffer * buf, MathAtom & t, docstring const & str,
1963                          Parse::flags f)
1964 {
1965         return Parser(str, f, buf).parse(t);
1966 }
1967
1968
1969 bool mathed_parse_normal(Buffer * buf, MathAtom & t, Lexer & lex,
1970                          Parse::flags f)
1971 {
1972         return Parser(lex, f, buf).parse(t);
1973 }
1974
1975
1976 bool mathed_parse_normal(InsetMathGrid & grid, docstring const & str,
1977                          Parse::flags f)
1978 {
1979         return Parser(str, f, &grid.buffer()).parse1(grid, 0, f & Parse::TEXTMODE ?
1980                         InsetMath::TEXT_MODE : InsetMath::MATH_MODE, false);
1981 }
1982
1983
1984 void initParser()
1985 {
1986         fill(theCatcode, theCatcode + 128, catOther);
1987         fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
1988         fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
1989
1990         theCatcode[int('\\')] = catEscape;
1991         theCatcode[int('{')]  = catBegin;
1992         theCatcode[int('}')]  = catEnd;
1993         theCatcode[int('$')]  = catMath;
1994         theCatcode[int('&')]  = catAlign;
1995         theCatcode[int('\n')] = catNewline;
1996         theCatcode[int('#')]  = catParameter;
1997         theCatcode[int('^')]  = catSuper;
1998         theCatcode[int('_')]  = catSub;
1999         theCatcode[int(0x7f)] = catIgnore;
2000         theCatcode[int(' ')]  = catSpace;
2001         theCatcode[int('\t')] = catSpace;
2002         theCatcode[int('\r')] = catNewline;
2003         theCatcode[int('~')]  = catActive;
2004         theCatcode[int('%')]  = catComment;
2005 }
2006
2007
2008 } // namespace lyx