src/mathed/math_parser.C

   1 /*
   2  *  File:        math_parser.C
   3  *  Purpose:     Parser for mathed
   4  *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   5  *  Created:     January 1996
   6  *  Description: Parse LaTeX2e math mode code.
   7  *
   8  *  Dependencies: Xlib, XForms
   9  *
  10  *  Copyright: 1996, Alejandro Aguilar Sierra
  11  *
  12  *   Version: 0.8beta.
  13  *
  14  *   You are free to use and modify this code under the terms of
  15  *   the GNU General Public Licence version 2 or later.
  16  */
  17
  18 // {[(
  19
  20 #include <config.h>
  21
  22 #include <cctype>
  23
  24 #ifdef __GNUG__
  25 #pragma implementation
  26 #endif
  27
  28 #include "math_parser.h"
  29 #include "array.h"
  30 #include "math_inset.h"
  31 #include "math_arrayinset.h"
  32 #include "math_bigopinset.h"
  33 #include "math_charinset.h"
  34 #include "math_dotsinset.h"
  35 #include "math_decorationinset.h"
  36 #include "math_deliminset.h"
  37 #include "math_fracinset.h"
  38 #include "math_funcinset.h"
  39 #include "math_funcliminset.h"
  40 #include "math_macro.h"
  41 #include "math_macrotable.h"
  42 #include "math_macrotemplate.h"
  43 #include "math_matrixinset.h"
  44 #include "math_noglyphinset.h"
  45 #include "math_rootinset.h"
  46 #include "math_scriptinset.h"
  47 #include "math_sizeinset.h"
  48 #include "math_spaceinset.h"
  49 #include "math_sqrtinset.h"
  50 #include "math_stackrelinset.h"
  51 #include "math_symbolinset.h"
  52 #include "debug.h"
  53 #include "mathed/support.h"
  54 #include "lyxlex.h"
  55 #include "support/lstrings.h"
  56
  57 using std::istream;
  58 using std::endl;
  59
  60
  61
  62 // These are lexical codes, not semantic
  63 enum lexcode_enum {
  64         LexNone,
  65         LexESC,
  66         LexAlpha,
  67         LexDigit,
  68         LexBOP,         // Binary operators or relations
  69         LexOpen,
  70         LexClose,
  71         LexComment,
  72         LexArgument,
  73         LexSpace,
  74         LexNewLine,
  75         LexOther,
  76         LexMath,
  77         LexSelf
  78 };
  79
  80 lexcode_enum lexcode[256];
  81
  82
  83 namespace {
  84
  85 void mathed_parse_into(MathArray & array, unsigned flags);
  86
  87 unsigned char getuchar(std::istream * is)
  88 {
  89         char c = 0;
  90         is->get(c);
  91         if (!is->good())
  92                 lyxerr << "The input stream is not well..." << endl;
  93
  94         return static_cast<unsigned char>(c);
  95 }
  96
  97 const unsigned char LM_TK_OPEN  = '{';
  98 const unsigned char LM_TK_CLOSE = '}';
  99
 100 enum {
 101         FLAG_BRACE      = 1 << 0,  //  A { needed              //}
 102         FLAG_BRACE_LAST = 1 << 1,  //  // { Last } ends the parsing process
 103         FLAG_RIGHT      = 1 << 2,  //  Next right ends the parsing process
 104         FLAG_END        = 1 << 3,  //  Next end ends the parsing process
 105         FLAG_BRACE_FONT = 1 << 4,  //  // { Next } closes a font
 106         FLAG_BRACK_END  = 1 << 5,  //  // [ Next ] ends the parsing process
 107         FLAG_AMPERSAND  = 1 << 6,  //  Next & ends the parsing process
 108         FLAG_NEWLINE    = 1 << 7,  //  Next \\ ends the parsing process
 109         FLAG_ITEM       = 1 << 8,  //  read a (possibly braced token)
 110         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 111         FLAG_OPTARG     = 1 << 10  //  reads an argument in []
 112 };
 113
 114 ///
 115 struct {
 116         ///
 117         int i;
 118         ///
 119         latexkeys const * l;
 120 } yylval;
 121
 122
 123
 124 string yytext;
 125 int yylineno;
 126 istream * yyis;
 127
 128
 129
 130 struct latex_mathenv_type {
 131         char const *      name;
 132         char const *      basename;
 133         MathInsetTypes    typ;
 134         bool              numbered;
 135         bool              ams;
 136 };
 137
 138 latex_mathenv_type latex_mathenv[] = {
 139         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 140         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 141         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 142         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 143         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 144         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 145         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 146         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 147         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 148         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 149         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 150         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 151 };
 152
 153 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 154
 155
 156
 157 void mathPrintError(string const & msg)
 158 {
 159         //lyxerr[Debug::MATHED] << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 160         lyxerr << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 161 }
 162
 163
 164 void lexInit()
 165 {
 166         for (int i = 0; i <= 255; ++i) {
 167                 if (isdigit(i))
 168                         lexcode[i] = LexDigit;
 169                 else if (isspace(i))
 170                         lexcode[i] = LexSpace;
 171                 else
 172                         lexcode[i] = LexAlpha;
 173         }
 174
 175         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 176         lexcode['\n'] = LexNewLine;
 177         lexcode['%'] = LexComment;
 178         lexcode['#'] = LexArgument;
 179         lexcode['$'] = LexMath;
 180         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 181                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 182
 183         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 184                 lexcode['?'] = LexOther;
 185
 186         lexcode['\''] = lexcode['@'] = LexAlpha;
 187
 188         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 189                 lexcode['&'] = LexSelf;
 190
 191         lexcode['\\'] = LexESC;
 192         lexcode['{'] = LexOpen;
 193         lexcode['}'] = LexClose;
 194 }
 195
 196
 197 string lexArg(unsigned char lf, bool accept_spaces = false)
 198 {
 199         string result;
 200         unsigned char c = 0;
 201         while (yyis->good()) {
 202                 c = getuchar(yyis);
 203                 if (!isspace(c))
 204                         break;
 205         }
 206
 207         if (c != lf) {
 208                 yyis->putback(c);
 209                 return result;
 210         }
 211
 212         unsigned char rg = 0;
 213         if (lf == '{') rg = '}';
 214         if (lf == '[') rg = ']';
 215         if (lf == '(') rg = ')';
 216         if (!rg) {
 217                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 218                         << lf << "'" << endl;
 219                 return result;
 220         }
 221
 222         int depth = 1;
 223         do {
 224                 unsigned char c = getuchar(yyis);
 225                 if (c == lf)
 226                         ++depth;
 227                 if (c == rg)
 228                         --depth;
 229                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 230                         result += c;
 231         } while (depth > 0 && yyis->good());
 232
 233         return result;
 234 }
 235
 236
 237 int yylex()
 238 {
 239         static bool init_done = false;
 240
 241         if (!init_done) {
 242                 lexInit();
 243                 init_done = true;
 244         }
 245
 246         while (yyis->good()) {
 247                 unsigned char c = getuchar(yyis);
 248                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 249
 250                 if (lexcode[c] == LexNewLine) {
 251                         ++yylineno;
 252                         continue;
 253                 } else if (lexcode[c] == LexComment) {
 254                         do {
 255                                 c = getuchar(yyis);
 256                         } while (c != '\n' && yyis->good());  // eat comments
 257                 } else if (lexcode[c] == LexDigit || lexcode[c] == LexOther) {
 258                         yylval.i = c;
 259                         return LM_TK_STR;
 260                 } else if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 261                         yylval.i = c;
 262                         return LM_TK_ALPHA;
 263                 } else if (lexcode[c] == LexBOP) {
 264                         yylval.i = c;
 265                         return LM_TK_BOP;
 266                 } else if (lexcode[c] == LexMath) {
 267                         yylval.i = 0;
 268                         return LM_TK_MATH;
 269                 } else if (lexcode[c] == LexSelf) {
 270                         return c;
 271                 } else if (lexcode[c] == LexArgument) {
 272                         c = getuchar(yyis);
 273                         yylval.i = c - '0';
 274                         return LM_TK_ARGUMENT;
 275                 } else if (lexcode[c] == LexOpen) {
 276                         return LM_TK_OPEN;
 277                 } else if (lexcode[c] == LexClose) {
 278                         return LM_TK_CLOSE;
 279                 } else if (lexcode[c] == LexESC)   {
 280                         c = getuchar(yyis);
 281                         //lyxerr << "reading second byte: '" << c << "' code: " << lexcode[c] << endl;
 282                         string s;
 283                         s += c;
 284                         latexkeys const * l = in_word_set(s);
 285                         if (l) {
 286                                 //lyxerr << "found key: " << l << endl;
 287                                 //lyxerr << "found key name: " << l->name << endl;
 288                                 //lyxerr << "found key token: " << l->token << endl;
 289                                 yylval.l = l;
 290                                 yylval.i = l->id;
 291                                 return l->token;
 292                         }
 293                         if (lexcode[c] == LexAlpha) {
 294                                 yytext.erase();
 295                                 while (lexcode[c] == LexAlpha && yyis->good()) {
 296                                         yytext += c;
 297                                         c = getuchar(yyis);
 298                                 }
 299                                 while (lexcode[c] == LexSpace && yyis->good())
 300                                         c = getuchar(yyis);
 301                                 if (lexcode[c] != LexSpace)
 302                                         yyis->putback(c);
 303
 304                                 //lyxerr[Debug::MATHED] << "reading: text '" << yytext << "'\n";
 305                                 //lyxerr << "reading: text '" << yytext << "'\n";
 306                                 latexkeys const * l = in_word_set(yytext);
 307                                 if (!l)
 308                                         return LM_TK_UNDEF;
 309
 310                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 311                                         string name = lexArg('{');
 312                                         int i = 0;
 313                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 314                                                  ++i;
 315                                         yylval.i = i;
 316                                 } else if (l->token == LM_TK_SPACE)
 317                                         yylval.i = l->id;
 318                                 else
 319                                         yylval.l = l;
 320                                 return l->token;
 321                         }
 322                 }
 323         }
 324         return 0;
 325 }
 326
 327
 328 MathScriptInset * prevScriptInset(MathArray const & array)
 329 {
 330         MathInset * p = array.back();
 331         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
 332 }
 333
 334
 335 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
 336 {
 337         MathScriptInset * p = prevScriptInset(array);
 338         if (!p) {
 339                 MathInset * b = array.back();
 340                 if (b && b->isScriptable()) {
 341                         p = new MathScriptInset(up, down, b->clone());
 342                         array.pop_back();
 343                 } else {
 344                         p = new MathScriptInset(up, down);
 345                 }
 346                 array.push_back(p);
 347         }
 348         if (up)
 349                 p->up(true);
 350         if (down)
 351                 p->down(down);
 352         if (limits)
 353                 p->limits(limits);
 354         return p;
 355 }
 356
 357
 358 static bool   curr_num;
 359 static string curr_label;
 360
 361 void mathed_parse_lines(MathGridInset * p, int col, bool numbered, bool outmost)
 362 {
 363         // save global variables
 364         bool   const saved_num   = curr_num;
 365         string const saved_label = curr_label;
 366
 367         for (int row = 0; true; ++row) {
 368                 // reset global variables
 369                 curr_num   = numbered;
 370                 curr_label.erase();
 371
 372                 // reading a row
 373                 int idx = p->nargs() - p->ncols();
 374                 for (int i = 0; i < col - 1; ++i, ++idx)
 375                         mathed_parse_into(p->cell(idx), FLAG_AMPERSAND);
 376                 mathed_parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 377
 378                 if (outmost) {
 379                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 380                         m->numbered(row, curr_num);
 381                         m->label(row, curr_label);
 382                 }
 383
 384 #ifdef WITH_WARNINGS
 385 #warning Hack!
 386 #endif
 387                 // no newline
 388                 if (yylval.i != -1)
 389                         break;
 390
 391                 p->appendRow();
 392         }
 393
 394         // restore global variables
 395         curr_num   = saved_num;
 396         curr_label = saved_label;
 397 }
 398
 399
 400 MathMacroTemplate * mathed_parse_macro()
 401 {
 402         if (yylex() != LM_TK_NEWCOMMAND) {
 403                 lyxerr << "\\newcommand expected\n";
 404                 return 0;
 405         }
 406
 407         string name = lexArg('{').substr(1);
 408         string arg  = lexArg('[');
 409         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 410         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 411         mathed_parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 412         return p;
 413 }
 414
 415
 416 MathMatrixInset * mathed_parse_normal()
 417 {
 418         MathMatrixInset * p = 0;
 419         int t = yylex();
 420
 421         switch (t) {
 422                 case LM_TK_MATH:
 423                 case LM_TK_BEGIN: {
 424                         int i = yylval.i;
 425                         lyxerr[Debug::MATHED]
 426                                 << "reading math environment " << i << " "
 427                                 << latex_mathenv[i].name << "\n";
 428
 429                         MathInsetTypes typ = latex_mathenv[i].typ;
 430                         p = new MathMatrixInset(typ);
 431
 432                         switch (typ) {
 433
 434                                 case LM_OT_SIMPLE: {
 435                                         curr_num   = latex_mathenv[i].numbered;
 436                                         curr_label.erase();
 437                                         mathed_parse_into(p->cell(0), 0);
 438                                         p->numbered(0, curr_num);
 439                                         p->label(0, curr_label);
 440                                         break;
 441                                 }
 442
 443                                 case LM_OT_EQUATION: {
 444                                         curr_num   = latex_mathenv[i].numbered;
 445                                         curr_label.erase();
 446                                         mathed_parse_into(p->cell(0), FLAG_END);
 447                                         p->numbered(0, curr_num);
 448                                         p->label(0, curr_label);
 449                                         break;
 450                                 }
 451
 452                                 case LM_OT_EQNARRAY: {
 453                                         mathed_parse_lines(p, 3, latex_mathenv[i].numbered, true);
 454                                         break;
 455                                 }
 456
 457                                 case LM_OT_ALIGN: {
 458                                         p->halign(lexArg('{'));
 459                                         mathed_parse_lines(p, 2, latex_mathenv[i].numbered, true);
 460                                         break;
 461                                 }
 462
 463                                 case LM_OT_ALIGNAT: {
 464                                         p->halign(lexArg('{'));
 465                                         mathed_parse_lines(p, 2, latex_mathenv[i].numbered, true);
 466                                         break;
 467                                 }
 468
 469                                 default:
 470                                         lyxerr[Debug::MATHED]
 471                                                 << "1: unknown math environment: " << typ << "\n";
 472                         }
 473
 474                         break;
 475                 }
 476
 477                 default:
 478                         lyxerr[Debug::MATHED]
 479                                 << "2 unknown math environment: " << t << "\n";
 480         }
 481
 482         return p;
 483 }
 484
 485
 486 latexkeys const * read_delim()
 487 {
 488         int ld = yylex();
 489         lyxerr << "found symbol: " << ld << "\n";
 490         latexkeys const * l = in_word_set(".");
 491         switch (ld) {
 492                 case LM_TK_SYM:
 493                 case LM_TK_NOGLYPH:
 494                 case LM_TK_SPECIAL:
 495                 case LM_TK_BEGIN:
 496                         l = yylval.l;
 497                         lyxerr << "found key 1: '" << l << "'\n";
 498                         lyxerr << "found key 1: '" << l->name << "'\n";
 499                         break;
 500                 case LM_TK_STR:
 501                         string s;
 502                         s += yylval.i;
 503                         l = in_word_set(s);
 504                         lyxerr << "found key 2: '" << l->name << "'\n";
 505         }
 506         return l;
 507 }
 508
 509
 510 void mathed_parse_into(MathArray & array, unsigned flags)
 511 {
 512         static int plevel = -1;
 513
 514         ++plevel;
 515         MathTextCodes yyvarcode   = LM_TC_VAR;
 516
 517         int  t      = yylex();
 518         bool panic  = false;
 519         int  brace  = 0;
 520         int  limits = 0;
 521
 522         while (t) {
 523                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << yylval.i
 524                 //      << " '" << yytext << "'\n";
 525                 //array.dump(lyxerr);
 526                 //lyxerr << "\n";
 527
 528                 if (flags & FLAG_ITEM) {
 529                         flags &= ~FLAG_ITEM;
 530                         if (t == LM_TK_OPEN) {
 531                                 // skip the brace and regard everything to the next matching
 532                                 // closing brace
 533                                 t = yylex();
 534                                 ++brace;
 535                                 flags |= FLAG_BRACE_LAST;
 536                         } else {
 537                                 // regard only this single token
 538                                 flags |= FLAG_LEAVE;
 539                         }
 540                 }
 541
 542                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 543                         mathPrintError(
 544                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 545                         panic = true;
 546                         break;
 547                 }
 548
 549                 switch (t) {
 550
 551                 case LM_TK_ALPHA:
 552                         if (!isspace(yylval.i) || yyvarcode == LM_TC_TEXTRM)
 553                                 array.push_back(new MathCharInset(yylval.i, yyvarcode));
 554                         break;
 555
 556                 case LM_TK_ARGUMENT: {
 557                         MathMacroArgument * p = new MathMacroArgument(yylval.i);
 558                         p->code(yyvarcode);
 559                         array.push_back(p);
 560                         break;
 561                 }
 562
 563                 case LM_TK_SPECIAL:
 564                         array.push_back(new MathCharInset(yylval.i, LM_TC_SPECIAL));
 565                         break;
 566
 567                 case LM_TK_STR:
 568                         array.push_back(new MathCharInset(yylval.i, LM_TC_CONST));
 569                         break;
 570
 571                 case LM_TK_OPEN:
 572                         ++brace;
 573                         if (flags & FLAG_BRACE)
 574                                 flags &= ~FLAG_BRACE;
 575                         else
 576                                 array.push_back(new MathCharInset('{', LM_TC_TEX));
 577                         break;
 578
 579                 case LM_TK_CLOSE:
 580                         --brace;
 581                         if (brace < 0) {
 582                                 mathPrintError("Unmatching braces");
 583                                 panic = true;
 584                                 break;
 585                         }
 586                         if (flags & FLAG_BRACE_FONT) {
 587                                 yyvarcode = LM_TC_VAR;
 588                                 flags &= ~FLAG_BRACE_FONT;
 589                                 break;
 590                         }
 591                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 592                                 flags |= FLAG_LEAVE;
 593                         else
 594                                 array.push_back(new MathCharInset('}', LM_TC_TEX));
 595                         break;
 596
 597                 case '[':
 598                         array.push_back(new MathCharInset('[', LM_TC_CONST));
 599                         break;
 600
 601                 case ']':
 602                         if (flags & FLAG_BRACK_END)
 603                                 flags |= FLAG_LEAVE;
 604                         else
 605                                 array.push_back(new MathCharInset(']', LM_TC_CONST));
 606                         break;
 607
 608                 case '^':
 609                         mathed_parse_into(
 610                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 611                         break;
 612
 613                 case '_':
 614                         mathed_parse_into(
 615                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 616                         break;
 617
 618                 case LM_TK_LIMIT:
 619                         limits = yylval.l->id;
 620                         //lyxerr << "setting limit to " << limits << "\n";
 621                         break;
 622
 623                 case '&':
 624                         if (flags & FLAG_AMPERSAND) {
 625                                 flags &= ~FLAG_AMPERSAND;
 626                                 --plevel;
 627                                 return;
 628                         }
 629                         lyxerr[Debug::MATHED]
 630                                 << "found tab unexpectedly, array: '" << array << "'\n";
 631                         break;
 632
 633                 case LM_TK_NEWLINE:
 634                         if (flags & FLAG_NEWLINE) {
 635                                 flags &= ~FLAG_NEWLINE;
 636                                 --plevel;
 637                                 return;
 638                         }
 639                         lyxerr[Debug::MATHED]
 640                                 << "found newline unexpectedly, array: '" << array << "'\n";
 641                         break;
 642
 643                 case LM_TK_PROTECT:
 644                         break;
 645
 646                 case LM_TK_NOGLYPH:
 647                 case LM_TK_NOGLYPHB:
 648                         limits = 0;
 649                         array.push_back(new MathNoglyphInset(yylval.l));
 650                         break;
 651
 652                 case LM_TK_BIGSYM:
 653                         limits = 0;
 654                         array.push_back(new MathBigopInset(yylval.l));
 655                         break;
 656
 657                 case LM_TK_FUNCLIM:
 658                         limits = 0;
 659                         array.push_back(new MathFuncLimInset(yylval.l));
 660                         break;
 661
 662                 case LM_TK_SYM:
 663                         limits = 0;
 664                         array.push_back(new MathSymbolInset(yylval.l));
 665                         break;
 666
 667                 case LM_TK_BOP:
 668                         array.push_back(new MathCharInset(yylval.i, LM_TC_BOP));
 669                         break;
 670
 671                 case LM_TK_SPACE:
 672                         if (yylval.i >= 0)
 673                                 array.push_back(new MathSpaceInset(yylval.i));
 674                         break;
 675
 676                 case LM_TK_DOTS:
 677                         array.push_back(new MathDotsInset(yylval.l));
 678                         break;
 679
 680                 case LM_TK_STACK:
 681                 {
 682                         MathStackrelInset * p = new MathStackrelInset;
 683                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 684                         mathed_parse_into(p->cell(1), FLAG_ITEM);
 685                         array.push_back(p);
 686                         break;
 687                 }
 688
 689                 case LM_TK_FRAC:
 690                 {
 691                         MathFracInset * p = new MathFracInset;
 692                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 693                         mathed_parse_into(p->cell(1), FLAG_ITEM);
 694                         array.push_back(p);
 695                         break;
 696                 }
 697
 698                 case LM_TK_SQRT:
 699                 {
 700                         unsigned char c = getuchar(yyis);
 701                         if (c == '[') {
 702                                 array.push_back(new MathRootInset);
 703                                 mathed_parse_into(array.back()->cell(0), FLAG_BRACK_END);
 704                                 mathed_parse_into(array.back()->cell(1), FLAG_ITEM);
 705                         } else {
 706                                 yyis->putback(c);
 707                                 array.push_back(new MathSqrtInset);
 708                                 mathed_parse_into(array.back()->cell(0), FLAG_ITEM);
 709                         }
 710                         break;
 711                 }
 712
 713                 case LM_TK_LEFT:
 714                 {
 715                         latexkeys const * l = read_delim();
 716                         MathArray ar;
 717                         mathed_parse_into(ar, FLAG_RIGHT);
 718                         latexkeys const * r = read_delim();
 719                         MathDelimInset * dl = new MathDelimInset(l, r);
 720                         dl->cell(0) = ar;
 721                         array.push_back(dl);
 722                         break;
 723                 }
 724
 725                 case LM_TK_RIGHT:
 726                         if (flags & FLAG_RIGHT) {
 727                                 --plevel;
 728                                 return;
 729                         }
 730                         mathPrintError("Unmatched right delimiter");
 731 //        panic = true;
 732                         break;
 733
 734                 case LM_TK_FONT:
 735                         yyvarcode = static_cast<MathTextCodes>(yylval.l->id);
 736                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 737                         break;
 738
 739                 case LM_TK_STY:
 740                 {
 741                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 742                         //MathArray tmp = array;
 743                         //MathSizeInset * p = new MathSizeInset(MathStyles(yylval.l->id));
 744                         //array.push_back(p);
 745                         //mathed_parse_into(p->cell(0), FLAG_BRACE_FONT);
 746                         break;
 747                 }
 748
 749
 750                 case LM_TK_DECORATION:
 751                 {
 752                         MathDecorationInset * p = new MathDecorationInset(yylval.l);
 753                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 754                         array.push_back(p);
 755                         break;
 756                 }
 757
 758                 case LM_TK_NONUM:
 759                         curr_num = false;
 760                         break;
 761
 762                 case LM_TK_FUNC:
 763                         array.push_back(new MathSymbolInset(yylval.l));
 764                         break;
 765
 766                 case LM_TK_UNDEF:
 767                         if (MathMacroTable::hasTemplate(yytext)) {
 768                                 MathMacro * m = MathMacroTable::cloneTemplate(yytext);
 769                                 for (int i = 0; i < m->nargs(); ++i)
 770                                         mathed_parse_into(m->cell(i), FLAG_ITEM);
 771                                 array.push_back(m);
 772                                 m->metrics(LM_ST_TEXT);
 773                         } else
 774                                 array.push_back(new MathFuncInset(yytext));
 775                         break;
 776
 777                 case LM_TK_MATH:
 778                 case LM_TK_END:
 779                         --plevel;
 780                         return;
 781
 782                 case LM_TK_BEGIN:
 783                 {
 784                         int i = yylval.i;
 785                         MathInsetTypes typ = latex_mathenv[i].typ;
 786
 787                         if (typ == LM_OT_MATRIX) {
 788                                 string const valign = lexArg('[') + 'c';
 789                                 string const halign = lexArg('{');
 790                                 //lyxerr << "valign: '" << valign << "'\n";
 791                                 //lyxerr << "halign: '" << halign << "'\n";
 792                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 793                                 m->valign(valign[0]);
 794                                 m->halign(halign);
 795
 796                                 mathed_parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 797                                 array.push_back(m);
 798                                 //lyxerr << "read matrix " << *m << "\n";
 799                                 break;
 800                         } else
 801                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 802                         break;
 803                 }
 804
 805                 case LM_TK_MACRO:
 806                         array.push_back(MathMacroTable::cloneTemplate(yylval.l->name));
 807                         break;
 808
 809                 case LM_TK_LABEL:
 810                         curr_label = lexArg('{', true);
 811                         break;
 812
 813                 default:
 814                         mathPrintError("Unrecognized token");
 815                         lyxerr[Debug::MATHED] << "[" << t << " " << yytext << "]" << endl;
 816                         break;
 817
 818                 } // end of big switch
 819
 820                 if (flags & FLAG_LEAVE) {
 821                         flags &= ~FLAG_LEAVE;
 822                         break;
 823                 }
 824
 825                 if (panic) {
 826                         lyxerr << " Math Panic, expect problems!" << endl;
 827                         //   Search for the end command.
 828                         do {
 829                                 t = yylex();
 830                         } while (yyis->good() && t != LM_TK_END && t);
 831                 } else {
 832                         t = yylex();
 833                 }
 834         }
 835         --plevel;
 836 }
 837
 838 }
 839
 840
 841 MathArray mathed_parse_cell(string const & str)
 842 {
 843         istringstream is(str.c_str());
 844         yyis     = &is;
 845         yylineno = 0;
 846         MathArray ar;
 847         mathed_parse_into(ar, 0);
 848         return ar;
 849 }
 850
 851
 852 MathMacroTemplate * mathed_parse_macro(string const & str)
 853 {
 854         istringstream is(str.c_str());
 855         return mathed_parse_macro(is);
 856 }
 857
 858
 859 MathMatrixInset * mathed_parse_normal(string const & str)
 860 {
 861         istringstream is(str.c_str());
 862         return mathed_parse_normal(is);
 863 }
 864
 865
 866
 867 MathMatrixInset * mathed_parse_normal(istream & is)
 868 {
 869         yyis     = &is;
 870         yylineno = 0;
 871         return mathed_parse_normal();
 872 }
 873
 874
 875 MathMacroTemplate * mathed_parse_macro(istream & is)
 876 {
 877         yyis     = &is;
 878         yylineno = 0;
 879         return mathed_parse_macro();
 880 }
 881
 882
 883
 884 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 885 {
 886         yyis     = &lex.getStream();
 887         yylineno = lex.getLineNo();
 888
 889         MathMatrixInset * p = mathed_parse_normal();
 890
 891         // Update line number
 892         lex.setLineNo(yylineno);
 893
 894         // reading of end_inset
 895         while (lex.isOK()) {
 896                 lex.nextToken();
 897                 if (lex.getString() == "\\end_inset")
 898                         break;
 899                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 900                         " or missing \\end_inset!" << endl;
 901         }
 902
 903         return p;
 904 }
 905
 906 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 907 {
 908         yyis     = &lex.getStream();
 909         yylineno = lex.getLineNo();
 910
 911         MathMacroTemplate * p = mathed_parse_macro();
 912
 913         // Update line number
 914         lex.setLineNo(yylineno);
 915
 916         // reading of end_inset
 917         while (lex.isOK()) {
 918                 lex.nextToken();
 919                 if (lex.getString() == "\\end_inset")
 920                         break;
 921                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 922                         " or missing \\end_inset!" << endl;
 923         }
 924
 925         return p;
 926 }
 927 //]})