src/tex2lyx/preamble.cpp

   1 /**
   2  * \file preamble.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  * \author Uwe Stöhr
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 // {[(
  13
  14 #include <config.h>
  15
  16 #include "tex2lyx.h"
  17
  18 #include "Layout.h"
  19 #include "Lexer.h"
  20 #include "TextClass.h"
  21 #include "support/convert.h"
  22 #include "support/filetools.h"
  23 #include "support/lstrings.h"
  24
  25 #include <algorithm>
  26 #include <iostream>
  27 #include <sstream>
  28 #include <string>
  29 #include <vector>
  30 #include <map>
  31
  32 using namespace std;
  33 using namespace lyx::support;
  34
  35 namespace lyx {
  36
  37 // special columntypes
  38 extern map<char, int> special_columns;
  39
  40 map<string, vector<string> > used_packages;
  41
  42 // needed to handle encodings with babel
  43 bool one_language = true;
  44
  45 // to avoid that the babel options overwrite the documentclass options
  46 bool documentclass_language;
  47
  48 namespace {
  49
  50 const char * const known_languages[] = { "afrikaans", "american", "arabic",
  51 "austrian", "bahasa", "basque", "belarusian", "brazil", "breton", "british",
  52 "bulgarian", "canadian", "canadien", "catalan", "croatian", "czech", "danish",
  53 "dutch", "english", "esperanto", "estonian", "finnish", "francais", "french",
  54 "frenchb", "frenchle", "frenchpro", "galician", "german", "germanb", "greek",
  55 "hebrew", "icelandic", "irish", "italian", "lsorbian", "magyar", "naustrian",
  56 "ngerman", "ngermanb", "norsk", "nynorsk", "polish", "portuges", "romanian",
  57 "russian", "russianb", "scottish", "serbian", "slovak", "slovene", "spanish",
  58 "swedish", "thai", "turkish", "ukraineb", "ukrainian", "usorbian", "welsh", 0};
  59
  60 //note this when updating to lyxformat 305:
  61 //bahasai, indonesian, and indon = equal to bahasa
  62 //malay, and meyalu = equal to bahasam
  63
  64 const char * const known_french_languages[] = {"french", "frenchb", "francais",
  65                                                 "frenchle", "frenchpro", 0};
  66 const char * const known_german_languages[] = {"german", "germanb", 0};
  67 const char * const known_ngerman_languages[] = {"ngerman", "ngermanb", 0};
  68 const char * const known_russian_languages[] = {"russian", "russianb", 0};
  69 const char * const known_ukrainian_languages[] = {"ukrainian", "ukraineb", 0};
  70
  71 char const * const known_fontsizes[] = { "10pt", "11pt", "12pt", 0 };
  72
  73 const char * const known_roman_fonts[] = { "ae", "bookman", "charter",
  74 "cmr", "fourier", "lmodern", "mathpazo", "mathptmx", "newcent", 0};
  75
  76 const char * const known_sans_fonts[] = { "avant", "berasans", "cmbr", "cmss",
  77 "helvet", "lmss", 0};
  78
  79 const char * const known_typewriter_fonts[] = { "beramono", "cmtl", "cmtt",
  80 "courier", "lmtt", "luximono", "fourier", "lmodern", "mathpazo", "mathptmx",
  81 "newcent", 0};
  82
  83 // some ugly stuff
  84 ostringstream h_preamble;
  85 string h_textclass               = "article";
  86 string h_options                 = string();
  87 string h_language                = "english";
  88 string h_inputencoding           = "auto";
  89 string h_font_roman              = "default";
  90 string h_font_sans               = "default";
  91 string h_font_typewriter         = "default";
  92 string h_font_default_family     = "default";
  93 string h_font_sc                 = "false";
  94 string h_font_osf                = "false";
  95 string h_font_sf_scale           = "100";
  96 string h_font_tt_scale           = "100";
  97 string h_graphics                = "default";
  98 string h_paperfontsize           = "default";
  99 string h_spacing                 = "single";
 100 string h_papersize               = "default";
 101 string h_use_geometry            = "false";
 102 string h_use_amsmath             = "0";
 103 string h_cite_engine             = "basic";
 104 string h_use_bibtopic            = "false";
 105 string h_paperorientation        = "portrait";
 106 string h_secnumdepth             = "3";
 107 string h_tocdepth                = "3";
 108 string h_paragraph_separation    = "indent";
 109 string h_defskip                 = "medskip";
 110 string h_quotes_language         = "english";
 111 string h_papercolumns            = "1";
 112 string h_papersides              = string();
 113 string h_paperpagestyle          = "default";
 114 string h_tracking_changes        = "false";
 115 string h_output_changes          = "false";
 116
 117
 118 void handle_opt(vector<string> & opts, char const * const * what, string & target)
 119 {
 120         if (opts.empty())
 121                 return;
 122
 123         // the last language option is the document language (for babel and LyX)
 124         // the last size option is the document font size
 125         vector<string>::iterator it;
 126         vector<string>::iterator position = opts.begin();
 127         for (; *what; ++what) {
 128                 it = find(opts.begin(), opts.end(), *what);
 129                 if (it != opts.end()) {
 130                         documentclass_language = true;
 131                         if (it >= position) {
 132                                 target = *what;
 133                                 position = it;
 134                         }
 135                 }
 136         }
 137 }
 138
 139
 140 void delete_opt(vector<string> & opts, char const * const * what)
 141 {
 142         if (opts.empty())
 143                 return;
 144
 145         // remove found options from the list
 146         // do this after handle_opt to avoid potential memory leaks and to be able
 147         // to find in every case the last language option
 148         vector<string>::iterator it;
 149         for (; *what; ++what) {
 150                 it = find(opts.begin(), opts.end(), *what);
 151                 if (it != opts.end())
 152                         opts.erase(it);
 153         }
 154 }
 155
 156
 157 /*!
 158  * Split a package options string (keyval format) into a vector.
 159  * Example input:
 160  *   authorformat=smallcaps,
 161  *   commabeforerest,
 162  *   titleformat=colonsep,
 163  *   bibformat={tabular,ibidem,numbered}
 164  */
 165 vector<string> split_options(string const & input)
 166 {
 167         vector<string> options;
 168         string option;
 169         Parser p(input);
 170         while (p.good()) {
 171                 Token const & t = p.get_token();
 172                 if (t.asInput() == ",") {
 173                         options.push_back(trim(option));
 174                         option.erase();
 175                 } else if (t.asInput() == "=") {
 176                         option += '=';
 177                         p.skip_spaces(true);
 178                         if (p.next_token().asInput() == "{")
 179                                 option += '{' + p.getArg('{', '}') + '}';
 180                 } else if (t.cat() != catSpace)
 181                         option += t.asInput();
 182         }
 183
 184         if (!option.empty())
 185                 options.push_back(trim(option));
 186
 187         return options;
 188 }
 189
 190
 191 /*!
 192  * Add package \p name with options \p options to used_packages.
 193  * Remove options from \p options that we don't want to output.
 194  */
 195 void add_package(string const & name, vector<string> & options)
 196 {
 197         // every package inherits the global options
 198         if (used_packages.find(name) == used_packages.end())
 199                 used_packages[name] = split_options(h_options);
 200
 201         vector<string> & v = used_packages[name];
 202         v.insert(v.end(), options.begin(), options.end());
 203         if (name == "jurabib") {
 204                 // Don't output the order argument (see the cite command
 205                 // handling code in text.cpp).
 206                 vector<string>::iterator end =
 207                         remove(options.begin(), options.end(), "natbiborder");
 208                 end = remove(options.begin(), end, "jurabiborder");
 209                 options.erase(end, options.end());
 210         }
 211 }
 212
 213
 214 // Given is a string like "scaled=0.9", return 0.9 * 100
 215 string const scale_as_percentage(string const & scale)
 216 {
 217         string::size_type pos = scale.find('=');
 218         if (pos != string::npos) {
 219                 string value = scale.substr(pos + 1);
 220                 if (isStrDbl(value))
 221                         return convert<string>(100 * convert<double>(value));
 222         }
 223         // If the input string didn't match our expectations.
 224         // return the default value "100"
 225         return "100";
 226 }
 227
 228
 229 void handle_package(string const & name, string const & opts)
 230 {
 231         vector<string> options = split_options(opts);
 232         add_package(name, options);
 233         string scale;
 234
 235         // roman fonts
 236         if (is_known(name, known_roman_fonts))
 237                 h_font_roman = name;
 238         if (name == "fourier") {
 239                 h_font_roman = "utopia";
 240                 // when font uses real small capitals
 241                 if (opts == "expert")
 242                         h_font_sc = "true";
 243         }
 244         if (name == "mathpazo")
 245                 h_font_roman = "palatino";
 246         if (name == "mathptmx")
 247                 h_font_roman = "times";
 248         // sansserif fonts
 249         if (is_known(name, known_sans_fonts)) {
 250                 h_font_sans = name;
 251                 if (!opts.empty()) {
 252                         scale = opts;
 253                         h_font_sf_scale = scale_as_percentage(scale);
 254                 }
 255         }
 256         // typewriter fonts
 257         if (is_known(name, known_typewriter_fonts)) {
 258                 h_font_typewriter = name;
 259                 if (!opts.empty()) {
 260                         scale = opts;
 261                         h_font_tt_scale = scale_as_percentage(scale);
 262                 }
 263         }
 264         // font uses old-style figure
 265         if (name == "eco")
 266                 h_font_osf = "true";
 267
 268         else if (name == "amsmath" || name == "amssymb")
 269                 h_use_amsmath = "1";
 270         else if (name == "babel" && !opts.empty()) {
 271                 // check if more than one option was used - used later for inputenc
 272                 // in case inputenc is parsed before babel, set the encoding to auto
 273                 if (options.begin() != options.end() - 1) {
 274                         one_language = false;
 275                         h_inputencoding = "auto";
 276                 }
 277                 // only set the document language when there was not already one set
 278                 // via the documentclass options
 279                 // babel takes the the last language given in the documentclass options
 280                 // as document language. If there is no such language option, the last
 281                 // option of its \usepackage call is used.
 282                 if (documentclass_language == false) {
 283                         handle_opt(options, known_languages, h_language);
 284                         delete_opt(options, known_languages);
 285                         if (is_known(h_language, known_french_languages))
 286                                 h_language = "french";
 287                         else if (is_known(h_language, known_german_languages))
 288                                 h_language = "german";
 289                         else if (is_known(h_language, known_ngerman_languages))
 290                                 h_language = "ngerman";
 291                         else if (is_known(h_language, known_russian_languages))
 292                                 h_language = "russian";
 293                         else if (is_known(h_language, known_ukrainian_languages))
 294                                 h_language = "ukrainian";
 295                         h_quotes_language = h_language;
 296                 }
 297         }
 298         else if (name == "fontenc")
 299                 ; // ignore this
 300         else if (name == "inputenc") {
 301                 // only set when there is not more than one inputenc option
 302                 // therefore check for the "," character
 303                 // also only set when there is not more then one babel language option
 304                 if (opts.find(",") == string::npos && one_language == true)
 305                         h_inputencoding = opts;
 306                 options.clear();
 307         } else if (name == "makeidx")
 308                 ; // ignore this
 309         else if (name == "verbatim")
 310                 ; // ignore this
 311         else if (name == "graphicx")
 312                 ; // ignore this
 313         else if (is_known(name, known_languages)) {
 314                 if (is_known(name, known_french_languages))
 315                         h_language = "french";
 316                 else if (is_known(name, known_german_languages))
 317                         h_language = "german";
 318                 else if (is_known(name, known_ngerman_languages))
 319                         h_language = "ngerman";
 320                 else if (is_known(name, known_russian_languages))
 321                         h_language = "russian";
 322                 else if (is_known(name, known_ukrainian_languages))
 323                         h_language = "ukrainian";
 324                 else
 325                         h_language = name;
 326                 h_quotes_language = h_language;
 327
 328         } else if (name == "natbib") {
 329                 h_cite_engine = "natbib_authoryear";
 330                 vector<string>::iterator it =
 331                         find(options.begin(), options.end(), "authoryear");
 332                 if (it != options.end())
 333                         options.erase(it);
 334                 else {
 335                         it = find(options.begin(), options.end(), "numbers");
 336                         if (it != options.end()) {
 337                                 h_cite_engine = "natbib_numerical";
 338                                 options.erase(it);
 339                         }
 340                 }
 341         } else if (name == "jurabib") {
 342                 h_cite_engine = "jurabib";
 343         } else if (options.empty())
 344                 h_preamble << "\\usepackage{" << name << "}\n";
 345         else {
 346                 h_preamble << "\\usepackage[" << opts << "]{" << name << "}\n";
 347                 options.clear();
 348         }
 349
 350         // We need to do something with the options...
 351         if (!options.empty())
 352                 cerr << "Ignoring options '" << join(options, ",")
 353                      << "' of package " << name << '.' << endl;
 354 }
 355
 356
 357
 358 void end_preamble(ostream & os, TextClass const & /*textclass*/)
 359 {
 360         os << "#LyX file created by tex2lyx " << PACKAGE_VERSION << "\n"
 361            << "\\lyxformat 247\n"
 362            << "\\begin_document\n"
 363            << "\\begin_header\n"
 364            << "\\textclass " << h_textclass << "\n";
 365         if (!h_preamble.str().empty())
 366                 os << "\\begin_preamble\n" << h_preamble.str() << "\n\\end_preamble\n";
 367         if (!h_options.empty())
 368                 os << "\\options " << h_options << "\n";
 369         os << "\\language " << h_language << "\n"
 370            << "\\inputencoding " << h_inputencoding << "\n"
 371            << "\\font_roman " << h_font_roman << "\n"
 372            << "\\font_sans " << h_font_sans << "\n"
 373            << "\\font_typewriter " << h_font_typewriter << "\n"
 374            << "\\font_default_family " << h_font_default_family << "\n"
 375            << "\\font_sc " << h_font_sc << "\n"
 376            << "\\font_osf " << h_font_osf << "\n"
 377            << "\\font_sf_scale " << h_font_sf_scale << "\n"
 378            << "\\font_tt_scale " << h_font_tt_scale << "\n"
 379            << "\\graphics " << h_graphics << "\n"
 380            << "\\paperfontsize " << h_paperfontsize << "\n"
 381            << "\\spacing " << h_spacing << "\n"
 382            << "\\papersize " << h_papersize << "\n"
 383            << "\\use_geometry " << h_use_geometry << "\n"
 384            << "\\use_amsmath " << h_use_amsmath << "\n"
 385            << "\\cite_engine " << h_cite_engine << "\n"
 386            << "\\use_bibtopic " << h_use_bibtopic << "\n"
 387            << "\\paperorientation " << h_paperorientation << "\n"
 388            << "\\secnumdepth " << h_secnumdepth << "\n"
 389            << "\\tocdepth " << h_tocdepth << "\n"
 390            << "\\paragraph_separation " << h_paragraph_separation << "\n"
 391            << "\\defskip " << h_defskip << "\n"
 392            << "\\quotes_language " << h_quotes_language << "\n"
 393            << "\\papercolumns " << h_papercolumns << "\n"
 394            << "\\papersides " << h_papersides << "\n"
 395            << "\\paperpagestyle " << h_paperpagestyle << "\n"
 396            << "\\tracking_changes " << h_tracking_changes << "\n"
 397            << "\\output_changes " << h_output_changes << "\n"
 398            << "\\end_header\n\n"
 399            << "\\begin_body\n";
 400         // clear preamble for subdocuments
 401         h_preamble.str("");
 402 }
 403
 404 } // anonymous namespace
 405
 406 TextClass const parse_preamble(Parser & p, ostream & os, string const & forceclass)
 407 {
 408         // initialize fixed types
 409         special_columns['D'] = 3;
 410         bool is_full_document = false;
 411
 412         // determine whether this is a full document or a fragment for inclusion
 413         while (p.good()) {
 414                 Token const & t = p.get_token();
 415
 416                 if (t.cat() == catEscape && t.cs() == "documentclass") {
 417                         is_full_document = true;
 418                         break;
 419                 }
 420         }
 421         p.reset();
 422
 423         while (is_full_document && p.good()) {
 424                 Token const & t = p.get_token();
 425
 426 #ifdef FILEDEBUG
 427                 cerr << "t: " << t << "\n";
 428 #endif
 429
 430                 //
 431                 // cat codes
 432                 //
 433                 if (t.cat() == catLetter ||
 434                           t.cat() == catSuper ||
 435                           t.cat() == catSub ||
 436                           t.cat() == catOther ||
 437                           t.cat() == catMath ||
 438                           t.cat() == catActive ||
 439                           t.cat() == catBegin ||
 440                           t.cat() == catEnd ||
 441                           t.cat() == catAlign ||
 442                           t.cat() == catParameter)
 443                 h_preamble << t.character();
 444
 445                 else if (t.cat() == catSpace || t.cat() == catNewline)
 446                         h_preamble << t.asInput();
 447
 448                 else if (t.cat() == catComment)
 449                         h_preamble << t.asInput();
 450
 451                 else if (t.cs() == "pagestyle")
 452                         h_paperpagestyle = p.verbatim_item();
 453
 454                 else if (t.cs() == "makeatletter") {
 455                         p.setCatCode('@', catLetter);
 456                 }
 457
 458                 else if (t.cs() == "makeatother") {
 459                         p.setCatCode('@', catOther);
 460                 }
 461
 462                 else if (t.cs() == "newcommand" || t.cs() == "renewcommand"
 463                             || t.cs() == "providecommand") {
 464                         bool star = false;
 465                         if (p.next_token().character() == '*') {
 466                                 p.get_token();
 467                                 star = true;
 468                         }
 469                         string const name = p.verbatim_item();
 470                         string const opt1 = p.getOpt();
 471                         string const opt2 = p.getFullOpt();
 472                         string const body = p.verbatim_item();
 473                         // font settings
 474                         if (name == "\\rmdefault")
 475                                 if (is_known(body, known_roman_fonts))
 476                                         h_font_roman = body;
 477
 478                         if (name == "\\sfdefault")
 479                                 if (is_known(body, known_sans_fonts))
 480                                         h_font_sans = body;
 481
 482                         if (name == "\\ttdefault")
 483                                 if (is_known(body, known_typewriter_fonts))
 484                                         h_font_typewriter = body;
 485
 486                         if (name == "\\familydefault") {
 487                                 string family = body;
 488                                 // remove leading "\"
 489                                 h_font_default_family = family.erase(0,1);
 490                         }
 491                         // only non-lyxspecific stuff
 492                         if (   name != "\\noun"
 493                             && name != "\\tabularnewline"
 494                             && name != "\\LyX"
 495                             && name != "\\lyxline"
 496                             && name != "\\lyxaddress"
 497                             && name != "\\lyxrightaddress"
 498                             && name != "\\lyxdot"
 499                             && name != "\\boldsymbol"
 500                             && name != "\\lyxarrow"
 501                             && name != "\\rmdefault"
 502                             && name != "\\sfdefault"
 503                             && name != "\\ttdefault"
 504                             && name != "\\familydefault") {
 505                                 ostringstream ss;
 506                                 ss << '\\' << t.cs();
 507                                 if (star)
 508                                         ss << '*';
 509                                 ss << '{' << name << '}' << opt1 << opt2
 510                                    << '{' << body << "}";
 511                                 h_preamble << ss.str();
 512
 513                                 // Add the command to the known commands
 514                                 add_known_command(name, opt1, !opt2.empty());
 515 /*
 516                                 ostream & out = in_preamble ? h_preamble : os;
 517                                 out << "\\" << t.cs() << "{" << name << "}"
 518                                     << opts << "{" << body << "}";
 519 */
 520                         }
 521                 }
 522
 523                 else if (t.cs() == "documentclass") {
 524                         vector<string> opts = split_options(p.getArg('[', ']'));
 525                         handle_opt(opts, known_fontsizes, h_paperfontsize);
 526                         delete_opt(opts, known_fontsizes);
 527                         // delete "pt" at the end
 528                         string::size_type i = h_paperfontsize.find("pt");
 529                         if (i != string::npos)
 530                                 h_paperfontsize.erase(i);
 531                         // to avoid that the babel options overwrite the documentclass options
 532                         documentclass_language = false;
 533                         handle_opt(opts, known_languages, h_language);
 534                         delete_opt(opts, known_languages);
 535                         if (is_known(h_language, known_french_languages))
 536                                 h_language = "french";
 537                         else if (is_known(h_language, known_german_languages))
 538                                 h_language = "german";
 539                         else if (is_known(h_language, known_ngerman_languages))
 540                                 h_language = "ngerman";
 541                         else if (is_known(h_language, known_russian_languages))
 542                                 h_language = "russian";
 543                         else if (is_known(h_language, known_ukrainian_languages))
 544                                 h_language = "ukrainian";
 545                         h_quotes_language = h_language;
 546                         h_options = join(opts, ",");
 547                         h_textclass = p.getArg('{', '}');
 548                 }
 549
 550                 else if (t.cs() == "usepackage") {
 551                         string const options = p.getArg('[', ']');
 552                         string const name = p.getArg('{', '}');
 553                         if (options.empty() && name.find(',')) {
 554                                 vector<string> vecnames;
 555                                 split(name, vecnames, ',');
 556                                 vector<string>::const_iterator it  = vecnames.begin();
 557                                 vector<string>::const_iterator end = vecnames.end();
 558                                 for (; it != end; ++it)
 559                                         handle_package(trim(*it), string());
 560                         } else {
 561                                 handle_package(name, options);
 562                         }
 563                 }
 564
 565                 else if (t.cs() == "newenvironment") {
 566                         string const name = p.getArg('{', '}');
 567                         ostringstream ss;
 568                         ss << "\\newenvironment{" << name << "}";
 569                         ss << p.getOpt();
 570                         ss << p.getOpt();
 571                         ss << '{' << p.verbatim_item() << '}';
 572                         ss << '{' << p.verbatim_item() << '}';
 573                         if (name != "lyxcode" && name != "lyxlist" &&
 574                             name != "lyxrightadress" &&
 575                             name != "lyxaddress" && name != "lyxgreyedout")
 576                                 h_preamble << ss.str();
 577                 }
 578
 579                 else if (t.cs() == "def") {
 580                         string name = p.get_token().cs();
 581                         while (p.next_token().cat() != catBegin)
 582                                 name += p.get_token().asString();
 583                         h_preamble << "\\def\\" << name << '{'
 584                                    << p.verbatim_item() << "}";
 585                 }
 586
 587                 else if (t.cs() == "newcolumntype") {
 588                         string const name = p.getArg('{', '}');
 589                         trim(name);
 590                         int nargs = 0;
 591                         string opts = p.getOpt();
 592                         if (!opts.empty()) {
 593                                 istringstream is(string(opts, 1));
 594                                 is >> nargs;
 595                         }
 596                         special_columns[name[0]] = nargs;
 597                         h_preamble << "\\newcolumntype{" << name << "}";
 598                         if (nargs)
 599                                 h_preamble << "[" << nargs << "]";
 600                         h_preamble << "{" << p.verbatim_item() << "}";
 601                 }
 602
 603                 else if (t.cs() == "setcounter") {
 604                         string const name = p.getArg('{', '}');
 605                         string const content = p.getArg('{', '}');
 606                         if (name == "secnumdepth")
 607                                 h_secnumdepth = content;
 608                         else if (name == "tocdepth")
 609                                 h_tocdepth = content;
 610                         else
 611                                 h_preamble << "\\setcounter{" << name << "}{" << content << "}";
 612                 }
 613
 614                 else if (t.cs() == "setlength") {
 615                         string const name = p.verbatim_item();
 616                         string const content = p.verbatim_item();
 617                         // Is this correct?
 618                         if (name == "parskip")
 619                                 h_paragraph_separation = "skip";
 620                         else if (name == "parindent")
 621                                 h_paragraph_separation = "skip";
 622                         else
 623                                 h_preamble << "\\setlength{" << name << "}{" << content << "}";
 624                 }
 625
 626                 else if (t.cs() == "begin") {
 627                         string const name = p.getArg('{', '}');
 628                         if (name == "document")
 629                                 break;
 630                         h_preamble << "\\begin{" << name << "}";
 631                 }
 632
 633                 else if (t.cs() == "jurabibsetup") {
 634                         vector<string> jurabibsetup =
 635                                 split_options(p.getArg('{', '}'));
 636                         // add jurabibsetup to the jurabib package options
 637                         add_package("jurabib", jurabibsetup);
 638                         if (!jurabibsetup.empty()) {
 639                                 h_preamble << "\\jurabibsetup{"
 640                                            << join(jurabibsetup, ",") << '}';
 641                         }
 642                 }
 643
 644                 else if (!t.cs().empty())
 645                         h_preamble << '\\' << t.cs();
 646         }
 647         p.skip_spaces();
 648
 649         // Force textclass if the user wanted it
 650         if (!forceclass.empty())
 651                 h_textclass = forceclass;
 652         if (noweb_mode && !prefixIs(h_textclass, "literate-"))
 653                 h_textclass.insert(0, "literate-");
 654         FileName layoutfilename = libFileSearch("layouts", h_textclass, "layout");
 655         if (layoutfilename.empty()) {
 656                 cerr << "Error: Could not find layout file for textclass \"" << h_textclass << "\"." << endl;
 657                 exit(1);
 658         }
 659         TextClass textclass;
 660         textclass.read(layoutfilename);
 661         if (h_papersides.empty()) {
 662                 ostringstream ss;
 663                 ss << textclass.sides();
 664                 h_papersides = ss.str();
 665         }
 666         end_preamble(os, textclass);
 667         return textclass;
 668 }
 669
 670 // }])
 671
 672
 673 } // namespace lyx