src/output_latex.cpp

   1 /**
   2  * \file output_latex.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "output_latex.h"
  14
  15 #include "Buffer.h"
  16 #include "BufferParams.h"
  17 #include "Encoding.h"
  18 #include "Font.h"
  19 #include "InsetList.h"
  20 #include "Language.h"
  21 #include "Layout.h"
  22 #include "LyXRC.h"
  23 #include "OutputParams.h"
  24 #include "Paragraph.h"
  25 #include "ParagraphParameters.h"
  26 #include "texstream.h"
  27 #include "TextClass.h"
  28
  29 #include "insets/InsetBibitem.h"
  30 #include "insets/InsetArgument.h"
  31
  32 #include "frontends/alert.h"
  33
  34 #include "support/lassert.h"
  35 #include "support/convert.h"
  36 #include "support/debug.h"
  37 #include "support/lstrings.h"
  38 #include "support/lyxalgo.h"
  39 #include "support/textutils.h"
  40 #include "support/gettext.h"
  41
  42 #include <QThreadStorage>
  43
  44 #include <list>
  45 #include <stack>
  46
  47 using namespace std;
  48 using namespace lyx::support;
  49
  50
  51 namespace lyx {
  52
  53 namespace {
  54
  55 enum OpenEncoding {
  56         none,
  57         inputenc,
  58         CJK
  59 };
  60
  61
  62 struct OutputState
  63 {
  64         OutputState() : open_encoding_(none), cjk_inherited_(0),
  65                         prev_env_language_(0), nest_level_(0)
  66         {
  67         }
  68         OpenEncoding open_encoding_;
  69         int cjk_inherited_;
  70         Language const * prev_env_language_;
  71         int nest_level_;
  72         stack<int> lang_switch_depth_;          // Both are always empty when
  73         stack<string> open_polyglossia_lang_;   // not using polyglossia
  74 };
  75
  76
  77 OutputState * getOutputState()
  78 {
  79         // FIXME An instance of OutputState should be kept around for each export
  80         //       instead of using local thread storage
  81         static QThreadStorage<OutputState *> outputstate;
  82         if (!outputstate.hasLocalData())
  83                 outputstate.setLocalData(new OutputState);
  84         return outputstate.localData();
  85 }
  86
  87
  88 string const & openLanguageName(OutputState const * state)
  89 {
  90         // Return a reference to the last active language opened with
  91         // polyglossia or when using begin/end commands. If none or when
  92         // using babel with only a begin command, return a reference to
  93         // an empty string.
  94
  95         static string const empty;
  96
  97         return state->open_polyglossia_lang_.empty()
  98                 ? empty
  99                 : state->open_polyglossia_lang_.top();
 100 }
 101
 102
 103 bool atSameLastLangSwitchDepth(OutputState const * state)
 104 {
 105         // Return true if the actual nest level is the same at which the
 106         // language was switched when using polyglossia or begin/end
 107         // commands. Instead, return always true when using babel with
 108         // only a begin command.
 109
 110         return state->lang_switch_depth_.size() == 0
 111                         ? true
 112                         : abs(state->lang_switch_depth_.top()) == state->nest_level_;
 113 }
 114
 115
 116 bool isLocalSwitch(OutputState const * state)
 117 {
 118         // Return true if the language was opened by a local command switch.
 119
 120         return state->lang_switch_depth_.size()
 121                 && state->lang_switch_depth_.top() < 0;
 122 }
 123
 124
 125 bool langOpenedAtThisLevel(OutputState const * state)
 126 {
 127         // Return true if the language was opened at the current nesting level.
 128
 129         return state->lang_switch_depth_.size()
 130                 && abs(state->lang_switch_depth_.top()) == state->nest_level_;
 131 }
 132
 133
 134 string const getPolyglossiaEnvName(Language const * lang)
 135 {
 136         string result = lang->polyglossia();
 137         if (result == "arabic")
 138                 // exceptional spelling; see polyglossia docs.
 139                 result = "Arabic";
 140         return result;
 141 }
 142
 143
 144 string const getPolyglossiaBegin(string const & lang_begin_command,
 145                                  string const & lang, string const & opts,
 146                                  bool const localswitch = false)
 147 {
 148         string result;
 149         if (!lang.empty()) {
 150                 // we need to revert the upcasing done in getPolyglossiaEnvName()
 151                 // in case we have a local polyglossia command (\textarabic).
 152                 string language = localswitch ? ascii_lowercase(lang) : lang;
 153                 result = subst(lang_begin_command, "$$lang", language);
 154         }
 155         string options = opts.empty() ?
 156                     string() : "[" + opts + "]";
 157         result = subst(result, "$$opts", options);
 158
 159         return result;
 160 }
 161
 162
 163 struct TeXEnvironmentData
 164 {
 165         bool cjk_nested;
 166         Layout const * style;
 167         Language const * par_language;
 168         Encoding const * prev_encoding;
 169         bool leftindent_open;
 170 };
 171
 172
 173 static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
 174                                         Text const & text,
 175                                         ParagraphList::const_iterator pit,
 176                                         otexstream & os,
 177                                         OutputParams const & runparams)
 178 {
 179         TeXEnvironmentData data;
 180
 181         BufferParams const & bparams = buf.params();
 182
 183         // FIXME This test should not be necessary.
 184         // We should perhaps issue an error if it is.
 185         Layout const & style = text.inset().forcePlainLayout() ?
 186                 bparams.documentClass().plainLayout() : pit->layout();
 187
 188         ParagraphList const & paragraphs = text.paragraphs();
 189         ParagraphList::const_iterator const priorpit =
 190                 pit == paragraphs.begin() ? pit : prev(pit, 1);
 191
 192         OutputState * state = getOutputState();
 193         bool const use_prev_env_language = state->prev_env_language_ != 0
 194                         && priorpit->layout().isEnvironment()
 195                         && (priorpit->getDepth() > pit->getDepth()
 196                             || (priorpit->getDepth() == pit->getDepth()
 197                                 && priorpit->layout() != pit->layout()));
 198
 199         data.prev_encoding = runparams.encoding;
 200         data.par_language = pit->getParLanguage(bparams);
 201         Language const * const doc_language = bparams.language;
 202         Language const * const prev_par_language =
 203                 (pit != paragraphs.begin())
 204                 ? (use_prev_env_language ? state->prev_env_language_
 205                                          : priorpit->getParLanguage(bparams))
 206                 : doc_language;
 207
 208         bool const use_polyglossia = runparams.use_polyglossia;
 209         string const par_lang = use_polyglossia ?
 210                 getPolyglossiaEnvName(data.par_language) : data.par_language->babel();
 211         string const prev_par_lang = use_polyglossia ?
 212                 getPolyglossiaEnvName(prev_par_language) : prev_par_language->babel();
 213         string const doc_lang = use_polyglossia ?
 214                 getPolyglossiaEnvName(doc_language) : doc_language->babel();
 215         string const lang_begin_command = use_polyglossia ?
 216                 "\\begin{$$lang}" : lyxrc.language_command_begin;
 217         string const lang_end_command = use_polyglossia ?
 218                 "\\end{$$lang}" : lyxrc.language_command_end;
 219         bool const using_begin_end = use_polyglossia ||
 220                                         !lang_end_command.empty();
 221
 222         // For polyglossia, switch language outside of environment, if possible.
 223         if (par_lang != prev_par_lang) {
 224                 if ((!using_begin_end || langOpenedAtThisLevel(state)) &&
 225                     !lang_end_command.empty() &&
 226                     prev_par_lang != doc_lang &&
 227                     !prev_par_lang.empty()) {
 228                         os << from_ascii(subst(
 229                                 lang_end_command,
 230                                 "$$lang",
 231                                 prev_par_lang))
 232                           // the '%' is necessary to prevent unwanted whitespace
 233                           << "%\n";
 234                         if (using_begin_end)
 235                                 popLanguageName();
 236                 }
 237
 238                 // If no language was explicitly opened and we are using
 239                 // polyglossia or begin/end commands, then the current
 240                 // language is the document language.
 241                 string const & cur_lang = using_begin_end
 242                                           && state->lang_switch_depth_.size()
 243                                                   ? openLanguageName(state)
 244                                                   : doc_lang;
 245
 246                 if ((lang_end_command.empty() ||
 247                     par_lang != doc_lang ||
 248                     par_lang != cur_lang) &&
 249                     !par_lang.empty()) {
 250                             string bc = use_polyglossia ?
 251                                         getPolyglossiaBegin(lang_begin_command, par_lang,
 252                                                             data.par_language->polyglossiaOpts())
 253                                       : subst(lang_begin_command, "$$lang", par_lang);
 254                             os << bc;
 255                             // the '%' is necessary to prevent unwanted whitespace
 256                             os << "%\n";
 257                             if (using_begin_end)
 258                                     pushLanguageName(par_lang);
 259                 }
 260         }
 261
 262         data.leftindent_open = false;
 263         if (!pit->params().leftIndent().zero()) {
 264                 os << "\\begin{LyXParagraphLeftIndent}{"
 265                    << from_ascii(pit->params().leftIndent().asLatexString())
 266                    << "}\n";
 267                 data.leftindent_open = true;
 268         }
 269
 270         if (style.isEnvironment())
 271                 state->nest_level_ += 1;
 272
 273         if (style.isEnvironment() && !style.latexname().empty()) {
 274                 os << "\\begin{" << from_ascii(style.latexname()) << '}';
 275                 if (!style.latexargs().empty()) {
 276                         OutputParams rp = runparams;
 277                         rp.local_font = &pit->getFirstFontSettings(bparams);
 278                         latexArgInsets(paragraphs, pit, os, rp, style.latexargs());
 279                 }
 280                 if (style.latextype == LATEX_LIST_ENVIRONMENT) {
 281                         os << '{'
 282                            << pit->params().labelWidthString()
 283                            << "}\n";
 284                 } else if (style.labeltype == LABEL_BIBLIO) {
 285                         if (pit->params().labelWidthString().empty())
 286                                 os << '{' << bibitemWidest(buf, runparams) << "}\n";
 287                         else
 288                                 os << '{'
 289                                   << pit->params().labelWidthString()
 290                                   << "}\n";
 291                 } else
 292                         os << from_ascii(style.latexparam()) << '\n';
 293                 if (style.latextype == LATEX_BIB_ENVIRONMENT
 294                     || style.latextype == LATEX_ITEM_ENVIRONMENT
 295                     || style.latextype ==  LATEX_LIST_ENVIRONMENT) {
 296                         OutputParams rp = runparams;
 297                         rp.local_font = &pit->getFirstFontSettings(bparams);
 298                         latexArgInsets(paragraphs, pit, os, rp, style.listpreamble(),
 299                                        "listpreamble:");
 300                 }
 301         }
 302         data.style = &style;
 303
 304         // in multilingual environments, the CJK tags have to be nested properly
 305         data.cjk_nested = false;
 306         if (data.par_language->encoding()->package() == Encoding::CJK &&
 307             state->open_encoding_ != CJK && pit->isMultiLingual(bparams)) {
 308                 if (prev_par_language->encoding()->package() == Encoding::CJK)
 309                         os << "\\begin{CJK}{" << from_ascii(data.par_language->encoding()->latexName())
 310                            << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
 311                 state->open_encoding_ = CJK;
 312                 data.cjk_nested = true;
 313         }
 314         return data;
 315 }
 316
 317
 318 static void finishEnvironment(otexstream & os, OutputParams const & runparams,
 319                               TeXEnvironmentData const & data)
 320 {
 321         OutputState * state = getOutputState();
 322         // BufferParams const & bparams = buf.params(); // FIXME: for speedup shortcut below, would require passing of "buf" as argument
 323         if (state->open_encoding_ == CJK && data.cjk_nested) {
 324                 // We need to close the encoding even if it does not change
 325                 // to do correct environment nesting
 326                 os << "\\end{CJK}\n";
 327                 state->open_encoding_ = none;
 328         }
 329
 330         if (data.style->isEnvironment()) {
 331                 os << breakln;
 332                 bool const using_begin_end =
 333                         runparams.use_polyglossia ||
 334                                 !lyxrc.language_command_end.empty();
 335                 // Close any language opened at this nest level
 336                 if (using_begin_end) {
 337                         while (langOpenedAtThisLevel(state)) {
 338                                 if (isLocalSwitch(state)) {
 339                                         os << "}";
 340                                 } else {
 341                                         os << "\\end{"
 342                                            << openLanguageName(state)
 343                                            << "}%\n";
 344                                 }
 345                                 popLanguageName();
 346                         }
 347                 }
 348                 state->nest_level_ -= 1;
 349                 string const & name = data.style->latexname();
 350                 if (!name.empty())
 351                         os << "\\end{" << from_ascii(name) << "}\n";
 352                 state->prev_env_language_ = data.par_language;
 353                 if (runparams.encoding != data.prev_encoding) {
 354                         runparams.encoding = data.prev_encoding;
 355                         os << setEncoding(data.prev_encoding->iconvName());
 356                 }
 357         }
 358
 359         if (data.leftindent_open) {
 360                 os << breakln << "\\end{LyXParagraphLeftIndent}\n";
 361                 state->prev_env_language_ = data.par_language;
 362                 if (runparams.encoding != data.prev_encoding) {
 363                         runparams.encoding = data.prev_encoding;
 364                         os << setEncoding(data.prev_encoding->iconvName());
 365                 }
 366         }
 367
 368         // Check whether we should output a blank line after the environment
 369         if (!data.style->nextnoindent)
 370                 os << '\n';
 371 }
 372
 373
 374 void TeXEnvironment(Buffer const & buf, Text const & text,
 375                     OutputParams const & runparams,
 376                     pit_type & pit, otexstream & os)
 377 {
 378         ParagraphList const & paragraphs = text.paragraphs();
 379         ParagraphList::const_iterator ipar = paragraphs.constIterator(pit);
 380         LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << pit);
 381
 382         Layout const & current_layout = ipar->layout();
 383         depth_type const current_depth = ipar->params().depth();
 384         Length const & current_left_indent = ipar->params().leftIndent();
 385
 386         // This is for debugging purpose at the end.
 387         pit_type const par_begin = pit;
 388         for (; pit < runparams.par_end; ++pit) {
 389                 ParagraphList::const_iterator par = paragraphs.constIterator(pit);
 390
 391                 // check first if this is an higher depth paragraph.
 392                 bool go_out = (par->params().depth() < current_depth);
 393                 if (par->params().depth() == current_depth) {
 394                         // This environment is finished.
 395                         go_out |= (par->layout() != current_layout);
 396                         go_out |= (par->params().leftIndent() != current_left_indent);
 397                 }
 398                 if (go_out) {
 399                         // nothing to do here, restore pit and go out.
 400                         pit--;
 401                         break;
 402                 }
 403
 404                 if (par->layout() == current_layout
 405                         && par->params().depth() == current_depth
 406                         && par->params().leftIndent() == current_left_indent) {
 407                         // We are still in the same environment so TeXOnePar and continue;
 408                         TeXOnePar(buf, text, pit, os, runparams);
 409                         continue;
 410                 }
 411
 412                 // We are now in a deeper environment.
 413                 // Either par->layout() != current_layout
 414                 // Or     par->params().depth() > current_depth
 415                 // Or     par->params().leftIndent() != current_left_indent)
 416
 417                 // FIXME This test should not be necessary.
 418                 // We should perhaps issue an error if it is.
 419                 bool const force_plain_layout = text.inset().forcePlainLayout();
 420                 Layout const & style = force_plain_layout
 421                         ? buf.params().documentClass().plainLayout()
 422                         : par->layout();
 423
 424                 if (!style.isEnvironment()) {
 425                         // This is a standard paragraph, no need to call TeXEnvironment.
 426                         TeXOnePar(buf, text, pit, os, runparams);
 427                         continue;
 428                 }
 429
 430                 // This is a new environment.
 431                 TeXEnvironmentData const data =
 432                         prepareEnvironment(buf, text, par, os, runparams);
 433                 // Recursive call to TeXEnvironment!
 434                 TeXEnvironment(buf, text, runparams, pit, os);
 435                 finishEnvironment(os, runparams, data);
 436         }
 437
 438         if (pit != runparams.par_end)
 439                 LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << par_begin << " done.");
 440 }
 441
 442
 443 void getArgInsets(otexstream & os, OutputParams const & runparams, Layout::LaTeXArgMap const & latexargs,
 444                   map<int, lyx::InsetArgument const *> ilist, vector<string> required, string const & prefix)
 445 {
 446         unsigned int const argnr = latexargs.size();
 447         if (argnr == 0)
 448                 return;
 449
 450         // Default and preset args are always output, so if they require
 451         // other arguments, consider this.
 452         for (auto const & larg : latexargs) {
 453                 Layout::latexarg const & arg = larg.second;
 454                 if ((!arg.presetarg.empty() || !arg.defaultarg.empty()) && !arg.requires.empty()) {
 455                                 vector<string> req = getVectorFromString(arg.requires);
 456                                 required.insert(required.end(), req.begin(), req.end());
 457                         }
 458         }
 459
 460         for (unsigned int i = 1; i <= argnr; ++i) {
 461                 map<int, InsetArgument const *>::const_iterator lit = ilist.find(i);
 462                 bool inserted = false;
 463                 if (lit != ilist.end()) {
 464                         InsetArgument const * ins = (*lit).second;
 465                         if (ins) {
 466                                 Layout::LaTeXArgMap::const_iterator const lait =
 467                                                 latexargs.find(ins->name());
 468                                 if (lait != latexargs.end()) {
 469                                         Layout::latexarg arg = (*lait).second;
 470                                         docstring ldelim;
 471                                         docstring rdelim;
 472                                         if (!arg.nodelims) {
 473                                                 ldelim = arg.mandatory ?
 474                                                         from_ascii("{") : from_ascii("[");
 475                                                 rdelim = arg.mandatory ?
 476                                                         from_ascii("}") : from_ascii("]");
 477                                         }
 478                                         if (!arg.ldelim.empty())
 479                                                 ldelim = arg.ldelim;
 480                                         if (!arg.rdelim.empty())
 481                                                 rdelim = arg.rdelim;
 482                                         ins->latexArgument(os, runparams, ldelim, rdelim, arg.presetarg);
 483                                         if (prefix == "listpreamble:")
 484                                                 os << breakln;
 485                                         inserted = true;
 486                                 }
 487                         }
 488                 }
 489                 if (!inserted) {
 490                         Layout::LaTeXArgMap::const_iterator lait = latexargs.begin();
 491                         Layout::LaTeXArgMap::const_iterator const laend = latexargs.end();
 492                         for (; lait != laend; ++lait) {
 493                                 string const name = prefix + convert<string>(i);
 494                                 if ((*lait).first == name) {
 495                                         Layout::latexarg arg = (*lait).second;
 496                                         docstring preset = arg.presetarg;
 497                                         if (!arg.defaultarg.empty()) {
 498                                                 if (!preset.empty())
 499                                                         preset += ",";
 500                                                 preset += arg.defaultarg;
 501                                         }
 502                                         if (arg.mandatory) {
 503                                                 docstring ldelim = arg.ldelim.empty() ?
 504                                                                 from_ascii("{") : arg.ldelim;
 505                                                 docstring rdelim = arg.rdelim.empty() ?
 506                                                                 from_ascii("}") : arg.rdelim;
 507                                                 os << ldelim << preset << rdelim;
 508                                         } else if (!preset.empty()) {
 509                                                 docstring ldelim = arg.ldelim.empty() ?
 510                                                                 from_ascii("[") : arg.ldelim;
 511                                                 docstring rdelim = arg.rdelim.empty() ?
 512                                                                 from_ascii("]") : arg.rdelim;
 513                                                 os << ldelim << preset << rdelim;
 514                                         } else if (find(required.begin(), required.end(),
 515                                                    (*lait).first) != required.end()) {
 516                                                 docstring ldelim = arg.ldelim.empty() ?
 517                                                                 from_ascii("[") : arg.ldelim;
 518                                                 docstring rdelim = arg.rdelim.empty() ?
 519                                                                 from_ascii("]") : arg.rdelim;
 520                                                 os << ldelim << rdelim;
 521                                         } else
 522                                                 break;
 523                                 }
 524                         }
 525                 }
 526         }
 527 }
 528
 529
 530 } // namespace
 531
 532
 533 void pushLanguageName(string const & lang_name, bool localswitch)
 534 {
 535         OutputState * state = getOutputState();
 536
 537         int nest_level = localswitch ? -state->nest_level_ : state->nest_level_;
 538         state->lang_switch_depth_.push(nest_level);
 539         state->open_polyglossia_lang_.push(lang_name);
 540 }
 541
 542
 543 void popLanguageName()
 544 {
 545         OutputState * state = getOutputState();
 546
 547         state->lang_switch_depth_.pop();
 548         state->open_polyglossia_lang_.pop();
 549 }
 550
 551
 552 string const & openLanguageName()
 553 {
 554         OutputState * state = getOutputState();
 555
 556         return openLanguageName(state);
 557 }
 558
 559
 560 namespace {
 561
 562 void addArgInsets(Paragraph const & par, string const & prefix,
 563                  Layout::LaTeXArgMap const & latexargs,
 564                  map<int, InsetArgument const *> & ilist,
 565                  vector<string> & required)
 566 {
 567         for (auto const & table : par.insetList()) {
 568                 InsetArgument const * arg = table.inset->asInsetArgument();
 569                 if (!arg)
 570                         continue;
 571                 if (arg->name().empty()) {
 572                         LYXERR0("Error: Unnamed argument inset!");
 573                         continue;
 574                 }
 575                 string const name = prefix.empty() ?
 576                         arg->name() : split(arg->name(), ':');
 577                 // why converting into an integer?
 578                 unsigned int const nr = convert<unsigned int>(name);
 579                 if (ilist.find(nr) == ilist.end())
 580                         ilist[nr] = arg;
 581                 Layout::LaTeXArgMap::const_iterator const lit =
 582                         latexargs.find(arg->name());
 583                 if (lit != latexargs.end()) {
 584                         Layout::latexarg const & larg = lit->second;
 585                         vector<string> req = getVectorFromString(larg.requires);
 586                         move(req.begin(), req.end(), back_inserter(required));
 587                 }
 588         }
 589 }
 590
 591 } // namespace
 592
 593
 594 void latexArgInsets(Paragraph const & par, otexstream & os,
 595                     OutputParams const & runparams,
 596                     Layout::LaTeXArgMap const & latexargs,
 597                     string const & prefix)
 598 {
 599         map<int, InsetArgument const *> ilist;
 600         vector<string> required;
 601         addArgInsets(par, prefix, latexargs, ilist, required);
 602         getArgInsets(os, runparams, latexargs, ilist, required, prefix);
 603 }
 604
 605
 606 void latexArgInsets(ParagraphList const & pars,
 607                     ParagraphList::const_iterator pit,
 608                     otexstream & os, OutputParams const & runparams,
 609                     Layout::LaTeXArgMap const & latexargs,
 610                     string const & prefix)
 611 {
 612         map<int, InsetArgument const *> ilist;
 613         vector<string> required;
 614
 615         depth_type const current_depth = pit->params().depth();
 616         Layout const current_layout = pit->layout();
 617
 618         // get the first paragraph in sequence with this layout and depth
 619         pit_type offset = 0;
 620         while (true) {
 621                 if (lyx::prev(pit, offset) == pars.begin())
 622                         break;
 623                 ParagraphList::const_iterator priorpit = lyx::prev(pit, offset + 1);
 624                 if (priorpit->layout() == current_layout
 625                     && priorpit->params().depth() == current_depth)
 626                         ++offset;
 627                 else
 628                         break;
 629         }
 630
 631         ParagraphList::const_iterator spit = lyx::prev(pit, offset);
 632
 633         for (; spit != pars.end(); ++spit) {
 634                 if (spit->layout() != current_layout ||
 635                     spit->params().depth() < current_depth)
 636                         break;
 637                 if (spit->params().depth() > current_depth)
 638                         continue;
 639                 addArgInsets(*spit, prefix, latexargs, ilist, required);
 640         }
 641         getArgInsets(os, runparams, latexargs, ilist, required, prefix);
 642 }
 643
 644
 645 void latexArgInsetsForParent(ParagraphList const & pars, otexstream & os,
 646                              OutputParams const & runparams,
 647                              Layout::LaTeXArgMap const & latexargs,
 648                              string const & prefix)
 649 {
 650         map<int, InsetArgument const *> ilist;
 651         vector<string> required;
 652
 653         for (Paragraph const & par : pars) {
 654                 if (par.layout().hasArgs())
 655                         // The InsetArguments inside this paragraph refer to this paragraph
 656                         continue;
 657                 addArgInsets(par, prefix, latexargs, ilist, required);
 658         }
 659         getArgInsets(os, runparams, latexargs, ilist, required, prefix);
 660 }
 661
 662
 663 namespace {
 664
 665 // output the proper paragraph start according to latextype.
 666 void parStartCommand(Paragraph const & par, otexstream & os,
 667                      OutputParams const & runparams, Layout const & style)
 668 {
 669         switch (style.latextype) {
 670         case LATEX_COMMAND:
 671                 if (par.needsCProtection(runparams.moving_arg))
 672                         os << "\\cprotect";
 673                 os << '\\' << from_ascii(style.latexname());
 674
 675                 // Command arguments
 676                 if (!style.latexargs().empty())
 677                         latexArgInsets(par, os, runparams, style.latexargs());
 678                 os << from_ascii(style.latexparam());
 679                 break;
 680         case LATEX_ITEM_ENVIRONMENT:
 681         case LATEX_LIST_ENVIRONMENT:
 682                 os << "\\" + style.itemcommand();
 683                 // Item arguments
 684                 if (!style.itemargs().empty())
 685                         latexArgInsets(par, os, runparams, style.itemargs(), "item:");
 686                 os << " ";
 687                 break;
 688         case LATEX_BIB_ENVIRONMENT:
 689                 // ignore this, the inset will write itself
 690                 break;
 691         default:
 692                 break;
 693         }
 694 }
 695
 696 } // namespace
 697
 698 // FIXME: this should be anonymous
 699 void TeXOnePar(Buffer const & buf,
 700                Text const & text,
 701                pit_type pit,
 702                otexstream & os,
 703                OutputParams const & runparams_in,
 704                string const & everypar,
 705                int start_pos, int end_pos,
 706                bool const force)
 707 {
 708         BufferParams const & bparams = runparams_in.is_child
 709                 ? buf.masterParams() : buf.params();
 710         ParagraphList const & paragraphs = text.paragraphs();
 711         Paragraph const & par = paragraphs.at(pit);
 712         // FIXME This check should not really be needed.
 713         // Perhaps we should issue an error if it is.
 714         Layout const & style = text.inset().forcePlainLayout() ?
 715                 bparams.documentClass().plainLayout() : par.layout();
 716
 717         if (style.inpreamble && !force)
 718                 return;
 719
 720         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " ptr " << &par << " '"
 721                 << everypar << "'");
 722
 723         OutputParams runparams = runparams_in;
 724         runparams.isLastPar = (pit == pit_type(paragraphs.size() - 1));
 725         // We reinitialze par begin and end to be on the safe side
 726         // with embedded inset as we don't know if they set those
 727         // value correctly.
 728         runparams.par_begin = 0;
 729         runparams.par_end = 0;
 730
 731         bool const maintext = text.isMainText();
 732         // we are at the beginning of an inset and CJK is already open;
 733         // we count inheritation levels to get the inset nesting right.
 734         OutputState * state = getOutputState();
 735         if (pit == 0 && !maintext
 736             && (state->cjk_inherited_ > 0 || state->open_encoding_ == CJK)) {
 737                 state->cjk_inherited_ += 1;
 738                 state->open_encoding_ = none;
 739         }
 740
 741         if (text.inset().isPassThru()) {
 742                 Font const outerfont = text.outerFont(pit);
 743
 744                 // No newline before first paragraph in this lyxtext
 745                 if (pit > 0) {
 746                         os << '\n';
 747                         if (!text.inset().getLayout().parbreakIsNewline())
 748                                 os << '\n';
 749                 }
 750
 751                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos, force);
 752                 return;
 753         }
 754
 755         Paragraph const * nextpar = runparams.isLastPar
 756                 ? 0 : &paragraphs.at(pit + 1);
 757
 758         bool const intitle_command = style.intitle && style.latextype == LATEX_COMMAND;
 759
 760         if (style.pass_thru) {
 761                 Font const outerfont = text.outerFont(pit);
 762                 parStartCommand(par, os, runparams, style);
 763                 if (intitle_command)
 764                         os << '{';
 765
 766                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos, force);
 767
 768                 // I did not create a parEndCommand for this minuscule
 769                 // task because in the other user of parStartCommand
 770                 // the code is different (JMarc)
 771                 if (style.isCommand())
 772                         os << "}\n";
 773                 else
 774                         os << '\n';
 775                 if (!style.parbreak_is_newline) {
 776                         os << '\n';
 777                 } else if (nextpar && !style.isEnvironment()) {
 778                         Layout const nextstyle = text.inset().forcePlainLayout()
 779                                 ? bparams.documentClass().plainLayout()
 780                                 : nextpar->layout();
 781                         if (nextstyle.name() != style.name())
 782                                 os << '\n';
 783                 }
 784
 785                 return;
 786         }
 787
 788         // This paragraph's language
 789         Language const * const par_language = par.getParLanguage(bparams);
 790         Language const * const nextpar_language = nextpar ?
 791                 nextpar->getParLanguage(bparams) : 0;
 792         // The document's language
 793         Language const * const doc_language = bparams.language;
 794         // The language that was in effect when the environment this paragraph is
 795         // inside of was opened
 796         Language const * const outer_language =
 797                 (runparams.local_font != 0) ?
 798                         runparams.local_font->language() : doc_language;
 799
 800         Paragraph const * priorpar = (pit == 0) ? 0 : &paragraphs.at(pit - 1);
 801
 802         // The previous language that was in effect is the language of the
 803         // previous paragraph, unless the previous paragraph is inside an
 804         // environment with nesting depth greater than (or equal to, but with
 805         // a different layout) the current one. If there is no previous
 806         // paragraph, the previous language is the outer language.
 807         // Note further that we take the outer language also if the prior par
 808         // is PassThru, since in that case it has latex_language, and all secondary
 809         // languages have been closed (#10793).
 810         bool const use_prev_env_language = state->prev_env_language_ != 0
 811                         && priorpar
 812                         && priorpar->layout().isEnvironment()
 813                         && (priorpar->getDepth() > par.getDepth()
 814                             || (priorpar->getDepth() == par.getDepth()
 815                                     && priorpar->layout() != par.layout()));
 816         Language const * const prev_language =
 817                 (priorpar && !priorpar->isPassThru())
 818                 ? (use_prev_env_language ? state->prev_env_language_
 819                                          : priorpar->getParLanguage(bparams))
 820                 : outer_language;
 821
 822         bool const use_polyglossia = runparams.use_polyglossia;
 823         string const par_lang = use_polyglossia ?
 824                 getPolyglossiaEnvName(par_language): par_language->babel();
 825         string const prev_lang = use_polyglossia ?
 826                 getPolyglossiaEnvName(prev_language) : prev_language->babel();
 827         string const outer_lang = use_polyglossia ?
 828                 getPolyglossiaEnvName(outer_language) : outer_language->babel();
 829         string const nextpar_lang = nextpar_language ? (use_polyglossia ?
 830                 getPolyglossiaEnvName(nextpar_language) :
 831                 nextpar_language->babel()) : string();
 832         string lang_begin_command = use_polyglossia ?
 833                 "\\begin{$$lang}$$opts" : lyxrc.language_command_begin;
 834         string lang_end_command = use_polyglossia ?
 835                 "\\end{$$lang}" : lyxrc.language_command_end;
 836         // the '%' is necessary to prevent unwanted whitespace
 837         string lang_command_termination = "%\n";
 838         bool const using_begin_end = use_polyglossia ||
 839                                         !lang_end_command.empty();
 840
 841         // For InTitle commands, we need to switch the language inside the command
 842         // (see #10849); thus open the command here.
 843         if (intitle_command) {
 844                 parStartCommand(par, os, runparams, style);
 845                 os << '{';
 846         }
 847
 848         // In some insets (such as Arguments), we cannot use \selectlanguage.
 849         // Also, if an RTL language is set via environment in polyglossia,
 850         // only a nested \\text<lang> command will reset the direction for LTR
 851         // languages (see # 10111).
 852         bool const in_polyglossia_rtl_env =
 853                 use_polyglossia
 854                 && runparams.local_font != 0
 855                 && outer_language->rightToLeft()
 856                 && !par_language->rightToLeft();
 857         bool const localswitch = text.inset().forceLocalFontSwitch()
 858                         || (using_begin_end && text.inset().forcePlainLayout())
 859                         || in_polyglossia_rtl_env;
 860         if (localswitch) {
 861                 lang_begin_command = use_polyglossia ?
 862                             "\\text$$lang$$opts{" : lyxrc.language_command_local;
 863                 lang_end_command = "}";
 864                 lang_command_termination.clear();
 865         }
 866
 867         bool const localswitch_needed = localswitch && par_lang != outer_lang;
 868
 869         // localswitches need to be closed and reopened at each par
 870         if ((par_lang != prev_lang || localswitch_needed)
 871              // check if we already put language command in TeXEnvironment()
 872              && !(style.isEnvironment()
 873                   && (pit == 0 || (priorpar->layout() != par.layout()
 874                                    && priorpar->getDepth() <= par.getDepth())
 875                       || priorpar->getDepth() < par.getDepth()))) {
 876                 if (!localswitch
 877                     && (!using_begin_end || langOpenedAtThisLevel(state))
 878                     && !lang_end_command.empty()
 879                     && prev_lang != outer_lang
 880                     && !prev_lang.empty()
 881                     && (!using_begin_end || !style.isEnvironment())) {
 882                         os << from_ascii(subst(lang_end_command,
 883                                                "$$lang",
 884                                                prev_lang))
 885                            << lang_command_termination;
 886                         if (using_begin_end)
 887                                 popLanguageName();
 888                 }
 889
 890                 // We need to open a new language if we couldn't close the previous
 891                 // one (because there's no language_command_end); and even if we closed
 892                 // the previous one, if the current language is different than the
 893                 // outer_language (which is currently in effect once the previous one
 894                 // is closed).
 895                 if ((lang_end_command.empty() || par_lang != outer_lang
 896                      || (!using_begin_end
 897                          || (style.isEnvironment() && par_lang != prev_lang)))
 898                         && !par_lang.empty()) {
 899                         // If we're inside an inset, and that inset is within an \L or \R
 900                         // (or equivalents), then within the inset, too, any opposite
 901                         // language paragraph should appear within an \L or \R (in addition
 902                         // to, outside of, the normal language switch commands).
 903                         // This behavior is not correct for ArabTeX, though.
 904                         if (!using_begin_end
 905                             // not for ArabTeX
 906                             && par_language->lang() != "arabic_arabtex"
 907                             && outer_language->lang() != "arabic_arabtex"
 908                             // are we in an inset?
 909                             && runparams.local_font != 0
 910                             // is the inset within an \L or \R?
 911                             //
 912                             // FIXME: currently, we don't check this; this means that
 913                             // we'll have unnnecessary \L and \R commands, but that
 914                             // doesn't seem to hurt (though latex will complain)
 915                             //
 916                             // is this paragraph in the opposite direction?
 917                             && runparams.local_font->isRightToLeft() != par_language->rightToLeft()) {
 918                                 // FIXME: I don't have a working copy of the Arabi package, so
 919                                 // I'm not sure if the farsi and arabic_arabi stuff is correct
 920                                 // or not...
 921                                 if (par_language->lang() == "farsi")
 922                                         os << "\\textFR{";
 923                                 else if (outer_language->lang() == "farsi")
 924                                         os << "\\textLR{";
 925                                 else if (par_language->lang() == "arabic_arabi")
 926                                         os << "\\textAR{";
 927                                 else if (outer_language->lang() == "arabic_arabi")
 928                                         os << "\\textLR{";
 929                                 // remaining RTL languages currently is hebrew
 930                                 else if (par_language->rightToLeft())
 931                                         os << "\\R{";
 932                                 else
 933                                         os << "\\L{";
 934                         }
 935                         // With CJK, the CJK tag has to be closed first (see below)
 936                         if (runparams.encoding->package() != Encoding::CJK
 937                             && (par_lang != openLanguageName(state) || localswitch)
 938                             && !par_lang.empty()) {
 939                                 string bc = use_polyglossia ?
 940                                           getPolyglossiaBegin(lang_begin_command, par_lang,
 941                                                               par_language->polyglossiaOpts(),
 942                                                               localswitch)
 943                                           : subst(lang_begin_command, "$$lang", par_lang);
 944                                 os << bc;
 945                                 os << lang_command_termination;
 946                                 if (using_begin_end)
 947                                         pushLanguageName(par_lang, localswitch);
 948                         }
 949                 }
 950         }
 951
 952         // Switch file encoding if necessary; no need to do this for "default"
 953         // encoding, since this only affects the position of the outputted
 954         // \inputencoding command; the encoding switch will occur when necessary
 955         if (bparams.inputenc == "auto"
 956                 && !runparams.isFullUnicode() // Xe/LuaTeX use one document-wide encoding  (see also switchEncoding())
 957                 && runparams.encoding->package() != Encoding::none) {
 958                 // Look ahead for future encoding changes.
 959                 // We try to output them at the beginning of the paragraph,
 960                 // since the \inputencoding command is not allowed e.g. in
 961                 // sections. For this reason we only set runparams.moving_arg
 962                 // after checking for the encoding change, otherwise the
 963                 // change would be always avoided by switchEncoding().
 964                 for (pos_type i = 0; i < par.size(); ++i) {
 965                         char_type const c = par.getChar(i);
 966                         Encoding const * const encoding =
 967                                 par.getFontSettings(bparams, i).language()->encoding();
 968                         if (encoding->package() != Encoding::CJK
 969                                 && runparams.encoding->package() == Encoding::inputenc
 970                                 && isASCII(c))
 971                                 continue;
 972                         if (par.isInset(i))
 973                                 break;
 974                         // All characters before c are in the ASCII range, and
 975                         // c is non-ASCII (but no inset), so change the
 976                         // encoding to that required by the language of c.
 977                         // With CJK, only add switch if we have CJK content at the beginning
 978                         // of the paragraph
 979                         if (i != 0 && encoding->package() == Encoding::CJK)
 980                                 continue;
 981
 982                         pair<bool, int> enc_switch = switchEncoding(os.os(),
 983                                                 bparams, runparams, *encoding);
 984                         // the following is necessary after a CJK environment in a multilingual
 985                         // context (nesting issue).
 986                         if (par_language->encoding()->package() == Encoding::CJK
 987                                 && state->open_encoding_ != CJK && state->cjk_inherited_ == 0) {
 988                                 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 989                                    << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
 990                                 state->open_encoding_ = CJK;
 991                         }
 992                         if (encoding->package() != Encoding::none && enc_switch.first) {
 993                                 if (enc_switch.second > 0) {
 994                                         // the '%' is necessary to prevent unwanted whitespace
 995                                         os << "%\n";
 996                                 }
 997                                 // With CJK, the CJK tag had to be closed first (see above)
 998                                 if (runparams.encoding->package() == Encoding::CJK
 999                                     && par_lang != openLanguageName(state)
1000                                     && !par_lang.empty()) {
1001                                         string bc = use_polyglossia ?
1002                                                     getPolyglossiaBegin(lang_begin_command, par_lang,
1003                                                                         par_language->polyglossiaOpts(),
1004                                                                         localswitch)
1005                                                     : subst(lang_begin_command, "$$lang", par_lang);
1006                                         os << bc
1007                                            << lang_command_termination;
1008                                         if (using_begin_end)
1009                                                 pushLanguageName(par_lang, localswitch);
1010                                 }
1011                                 runparams.encoding = encoding;
1012                         }
1013                         break;
1014                 }
1015         }
1016
1017         runparams.moving_arg |= style.needprotect;
1018         Encoding const * const prev_encoding = runparams.encoding;
1019
1020         bool const useSetSpace = bparams.documentClass().provides("SetSpace");
1021         if (par.allowParagraphCustomization()) {
1022                 if (par.params().startOfAppendix()) {
1023                         os << "\n\\appendix\n";
1024                 }
1025
1026                 // InTitle commands must use switches (not environments)
1027                 // inside the commands (see #9332)
1028                 if (style.intitle) {
1029                         if (!par.params().spacing().isDefault())
1030                         {
1031                                 if (runparams.moving_arg)
1032                                         os << "\\protect";
1033                                 os << from_ascii(par.params().spacing().writeCmd(useSetSpace));
1034                         }
1035                 } else {
1036                         if (!par.params().spacing().isDefault()
1037                                 && (pit == 0 || !priorpar->hasSameLayout(par)))
1038                         {
1039                                 os << from_ascii(par.params().spacing().writeEnvirBegin(useSetSpace))
1040                                     << '\n';
1041                         }
1042
1043                         if (style.isCommand()) {
1044                                 os << '\n';
1045                         }
1046                 }
1047         }
1048
1049         // For InTitle commands, we already started the command before
1050         // the language switch
1051         if (!intitle_command)
1052                 parStartCommand(par, os, runparams, style);
1053
1054         Font const outerfont = text.outerFont(pit);
1055
1056         // FIXME UNICODE
1057         os << from_utf8(everypar);
1058         par.latex(bparams, outerfont, os, runparams, start_pos, end_pos, force);
1059
1060         Font const font = par.empty()
1061                  ? par.getLayoutFont(bparams, outerfont)
1062                  : par.getFont(bparams, par.size() - 1, outerfont);
1063
1064         bool const is_command = style.isCommand();
1065
1066         // InTitle commands need to be closed after the language has been closed.
1067         if (!intitle_command) {
1068                 if (is_command) {
1069                         os << '}';
1070                         if (!style.postcommandargs().empty())
1071                                 latexArgInsets(par, os, runparams, style.postcommandargs(), "post:");
1072                         if (runparams.encoding != prev_encoding) {
1073                                 runparams.encoding = prev_encoding;
1074                                 os << setEncoding(prev_encoding->iconvName());
1075                         }
1076                 }
1077         }
1078
1079         bool pending_newline = false;
1080         bool unskip_newline = false;
1081         bool close_lang_switch = false;
1082         switch (style.latextype) {
1083         case LATEX_ITEM_ENVIRONMENT:
1084         case LATEX_LIST_ENVIRONMENT:
1085                 if ((nextpar && par_lang != nextpar_lang
1086                              && nextpar->getDepth() == par.getDepth())
1087                     || (atSameLastLangSwitchDepth(state) && nextpar
1088                             && nextpar->getDepth() < par.getDepth()))
1089                         close_lang_switch = using_begin_end;
1090                 if (nextpar && par.params().depth() < nextpar->params().depth())
1091                         pending_newline = true;
1092                 break;
1093         case LATEX_ENVIRONMENT: {
1094                 // if its the last paragraph of the current environment
1095                 // skip it otherwise fall through
1096                 if (nextpar
1097                     && ((nextpar->layout() != par.layout()
1098                            || nextpar->params().depth() != par.params().depth())
1099                         || (!using_begin_end || par_lang != nextpar_lang)))
1100                 {
1101                         close_lang_switch = using_begin_end;
1102                         break;
1103                 }
1104         }
1105         // possible
1106         // fall through
1107         default:
1108                 // we don't need it for the last paragraph and in InTitle commands!!!
1109                 if (nextpar && !intitle_command)
1110                         pending_newline = true;
1111         }
1112
1113         // InTitle commands use switches (not environments) for space settings
1114         if (par.allowParagraphCustomization() && !style.intitle) {
1115                 if (!par.params().spacing().isDefault()
1116                         && (runparams.isLastPar || !nextpar->hasSameLayout(par))) {
1117                         if (pending_newline)
1118                                 os << '\n';
1119
1120                         string const endtag =
1121                                 par.params().spacing().writeEnvirEnd(useSetSpace);
1122                         if (prefixIs(endtag, "\\end{"))
1123                                 os << breakln;
1124
1125                         os << from_ascii(endtag);
1126                         pending_newline = true;
1127                 }
1128         }
1129
1130         // Closing the language is needed for the last paragraph in a given language
1131         // as well as for any InTitleCommand (since these set the language locally);
1132         // it is also needed if we're within an \L or \R that we may have opened above
1133         // (not necessarily in this paragraph) and are about to close.
1134         bool closing_rtl_ltr_environment = !using_begin_end
1135                 // not for ArabTeX
1136                 && (par_language->lang() != "arabic_arabtex"
1137                     && outer_language->lang() != "arabic_arabtex")
1138                 // have we opened an \L or \R environment?
1139                 && runparams.local_font != 0
1140                 && runparams.local_font->isRightToLeft() != par_language->rightToLeft()
1141                 // are we about to close the language?
1142                 &&((nextpar && par_lang != nextpar_lang)
1143                    || (runparams.isLastPar && par_lang != outer_lang));
1144
1145         if (localswitch_needed
1146             || (intitle_command && using_begin_end)
1147             || closing_rtl_ltr_environment
1148             || ((runparams.isLastPar || close_lang_switch)
1149                 && (par_lang != outer_lang || (using_begin_end
1150                                                 && style.isEnvironment()
1151                                                 && par_lang != nextpar_lang)))) {
1152                 // Since \selectlanguage write the language to the aux file,
1153                 // we need to reset the language at the end of footnote or
1154                 // float.
1155
1156                 if (!localswitch && (pending_newline || close_lang_switch))
1157                         os << '\n';
1158
1159                 // when the paragraph uses CJK, the language has to be closed earlier
1160                 if (font.language()->encoding()->package() != Encoding::CJK) {
1161                         if (lang_end_command.empty()) {
1162                                 // If this is a child, we should restore the
1163                                 // master language after the last paragraph.
1164                                 Language const * const current_language =
1165                                         (runparams.isLastPar && runparams.master_language)
1166                                                 ? runparams.master_language
1167                                                 : outer_language;
1168                                 string const current_lang = use_polyglossia
1169                                         ? getPolyglossiaEnvName(current_language)
1170                                         : current_language->babel();
1171                                 if (!current_lang.empty()
1172                                     && current_lang != openLanguageName(state)) {
1173                                         string bc = use_polyglossia ?
1174                                                     getPolyglossiaBegin(lang_begin_command, current_lang,
1175                                                                         current_language->polyglossiaOpts(),
1176                                                                         localswitch)
1177                                                   : subst(lang_begin_command, "$$lang", current_lang);
1178                                         os << bc;
1179                                         pending_newline = !localswitch;
1180                                         unskip_newline = !localswitch;
1181                                         if (using_begin_end)
1182                                                 pushLanguageName(current_lang, localswitch);
1183                                 }
1184                         } else if ((!using_begin_end ||
1185                                     langOpenedAtThisLevel(state)) &&
1186                                    !par_lang.empty()) {
1187                                 // If we are in an environment, we have to
1188                                 // close the "outer" language afterwards
1189                                 string const & cur_lang = openLanguageName(state);
1190                                 if (!style.isEnvironment()
1191                                     || (close_lang_switch
1192                                         && atSameLastLangSwitchDepth(state)
1193                                         && par_lang != outer_lang
1194                                         && (par_lang != cur_lang
1195                                             || (cur_lang != outer_lang
1196                                                 && nextpar
1197                                                 && style != nextpar->layout())))
1198                                     || (atSameLastLangSwitchDepth(state)
1199                                         && state->lang_switch_depth_.size()
1200                                         && cur_lang != par_lang)
1201                                     || in_polyglossia_rtl_env)
1202                                 {
1203                                         if (using_begin_end && !localswitch)
1204                                                 os << breakln;
1205                                         os << from_ascii(subst(
1206                                                 lang_end_command,
1207                                                 "$$lang",
1208                                                 par_lang));
1209                                         pending_newline = !localswitch;
1210                                         unskip_newline = !localswitch;
1211                                         if (using_begin_end)
1212                                                 popLanguageName();
1213                                 }
1214                         }
1215                 }
1216         }
1217         if (closing_rtl_ltr_environment)
1218                 os << "}";
1219
1220         // InTitle commands need to be closed after the language has been closed.
1221         if (intitle_command) {
1222                 if (is_command) {
1223                         os << '}';
1224                         if (!style.postcommandargs().empty())
1225                                 latexArgInsets(par, os, runparams, style.postcommandargs(), "post:");
1226                         if (runparams.encoding != prev_encoding) {
1227                                 runparams.encoding = prev_encoding;
1228                                 os << setEncoding(prev_encoding->iconvName());
1229                         }
1230                 }
1231         }
1232
1233         bool const last_was_separator =
1234                 par.size() > 0 && par.isEnvSeparator(par.size() - 1);
1235
1236         if (pending_newline) {
1237                 if (unskip_newline)
1238                         // prevent unwanted whitespace
1239                         os << '%';
1240                 if (!os.afterParbreak() && !last_was_separator)
1241                         os << '\n';
1242         }
1243
1244         // if this is a CJK-paragraph and the next isn't, close CJK
1245         // also if the next paragraph is a multilingual environment (because of nesting)
1246         if (nextpar
1247                 && state->open_encoding_ == CJK
1248                 && (nextpar_language->encoding()->package() != Encoding::CJK
1249                    || (nextpar->layout().isEnvironment() && nextpar->isMultiLingual(bparams)))
1250                 // inbetween environments, CJK has to be closed later (nesting!)
1251                 && (!style.isEnvironment() || !nextpar->layout().isEnvironment())) {
1252                 os << "\\end{CJK}\n";
1253                 state->open_encoding_ = none;
1254         }
1255
1256         // If this is the last paragraph, close the CJK environment
1257         // if necessary. If it's an environment, we'll have to \end that first.
1258         if (runparams.isLastPar && !style.isEnvironment()) {
1259                 switch (state->open_encoding_) {
1260                         case CJK: {
1261                                 // do nothing at the end of child documents
1262                                 if (maintext && buf.masterBuffer() != &buf)
1263                                         break;
1264                                 // end of main text
1265                                 if (maintext) {
1266                                         os << "\n\\end{CJK}\n";
1267                                 // end of an inset
1268                                 } else
1269                                         os << "\\end{CJK}";
1270                                 state->open_encoding_ = none;
1271                                 break;
1272                         }
1273                         case inputenc: {
1274                                 os << "\\egroup";
1275                                 state->open_encoding_ = none;
1276                                 break;
1277                         }
1278                         case none:
1279                         default:
1280                                 // do nothing
1281                                 break;
1282                 }
1283         }
1284
1285         // If this is the last paragraph, and a local_font was set upon entering
1286         // the inset, and we're using "auto" or "default" encoding, and not
1287         // compiling with XeTeX or LuaTeX, the encoding
1288         // should be set back to that local_font's encoding.
1289         if (runparams.isLastPar && runparams_in.local_font != 0
1290             && runparams_in.encoding != runparams_in.local_font->language()->encoding()
1291             && (bparams.inputenc == "auto" || bparams.inputenc == "default")
1292                 && !runparams.isFullUnicode()
1293            ) {
1294                 runparams_in.encoding = runparams_in.local_font->language()->encoding();
1295                 os << setEncoding(runparams_in.encoding->iconvName());
1296         }
1297         // Otherwise, the current encoding should be set for the next paragraph.
1298         else
1299                 runparams_in.encoding = runparams.encoding;
1300
1301
1302         // we don't need a newline for the last paragraph!!!
1303         // Note from JMarc: we will re-add a \n explicitly in
1304         // TeXEnvironment, because it is needed in this case
1305         if (nextpar && !os.afterParbreak() && !last_was_separator) {
1306                 // Make sure to start a new line
1307                 os << breakln;
1308                 Layout const & next_layout = nextpar->layout();
1309                 // A newline '\n' is always output before a command,
1310                 // so avoid doubling it.
1311                 if (!next_layout.isCommand()) {
1312                         // Here we now try to avoid spurious empty lines by
1313                         // outputting a paragraph break only if: (case 1) the
1314                         // paragraph style allows parbreaks and no \begin, \end
1315                         // or \item tags are going to follow (i.e., if the next
1316                         // isn't the first or the current isn't the last
1317                         // paragraph of an environment or itemize) and the
1318                         // depth and alignment of the following paragraph is
1319                         // unchanged, or (case 2) the following is a
1320                         // non-environment paragraph whose depth is increased
1321                         // but whose alignment is unchanged, or (case 3) the
1322                         // paragraph is not an environment and the next one is a
1323                         // non-itemize-like env at lower depth, or (case 4) the
1324                         // paragraph is a command not followed by an environment
1325                         // and the alignment of the current and next paragraph
1326                         // is unchanged, or (case 5) the current alignment is
1327                         // changed and a standard paragraph follows.
1328                         DocumentClass const & tclass = bparams.documentClass();
1329                         if ((style == next_layout
1330                              && !style.parbreak_is_newline
1331                              && !text.inset().getLayout().parbreakIsNewline()
1332                              && style.latextype != LATEX_ITEM_ENVIRONMENT
1333                              && style.latextype != LATEX_LIST_ENVIRONMENT
1334                              && style.align == par.getAlign()
1335                              && nextpar->getDepth() == par.getDepth()
1336                              && nextpar->getAlign() == par.getAlign())
1337                             || (!next_layout.isEnvironment()
1338                                 && nextpar->getDepth() > par.getDepth()
1339                                 && nextpar->getAlign() == par.getAlign())
1340                             || (!style.isEnvironment()
1341                                 && next_layout.latextype == LATEX_ENVIRONMENT
1342                                 && nextpar->getDepth() < par.getDepth())
1343                             || (style.isCommand()
1344                                 && !next_layout.isEnvironment()
1345                                 && style.align == par.getAlign()
1346                                 && next_layout.align == nextpar->getAlign())
1347                             || (style.align != par.getAlign()
1348                                 && tclass.isDefaultLayout(next_layout))) {
1349                                 os << '\n';
1350                         }
1351                 }
1352         }
1353
1354         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " done; ptr "
1355                 << &par << " next " << nextpar);
1356
1357         return;
1358 }
1359
1360
1361 // LaTeX all paragraphs
1362 void latexParagraphs(Buffer const & buf,
1363                      Text const & text,
1364                      otexstream & os,
1365                      OutputParams const & runparams,
1366                      string const & everypar)
1367 {
1368         LASSERT(runparams.par_begin <= runparams.par_end,
1369                 { os << "% LaTeX Output Error\n"; return; } );
1370
1371         BufferParams const & bparams = buf.params();
1372         BufferParams const & mparams = buf.masterParams();
1373
1374         bool const maintext = text.isMainText();
1375         bool const is_child = buf.masterBuffer() != &buf;
1376         bool const multibib_child = maintext && is_child
1377                         && mparams.multibib == "child";
1378
1379         if (multibib_child && mparams.useBiblatex())
1380                 os << "\\newrefsection";
1381         else if (multibib_child && mparams.useBibtopic()) {
1382                 os << "\\begin{btUnit}\n";
1383                 runparams.openbtUnit = true;
1384         }
1385
1386         // Open a CJK environment at the beginning of the main buffer
1387         // if the document's language is a CJK language
1388         // (but not in child documents)
1389         OutputState * state = getOutputState();
1390         if (maintext && !is_child
1391             && bparams.encoding().package() == Encoding::CJK) {
1392                 os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
1393                 << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
1394                 state->open_encoding_ = CJK;
1395         }
1396         // if "auto begin" is switched off, explicitly switch the
1397         // language on at start
1398         string const mainlang = runparams.use_polyglossia
1399                 ? getPolyglossiaEnvName(bparams.language)
1400                 : bparams.language->babel();
1401         string const lang_begin_command = runparams.use_polyglossia ?
1402                 "\\begin{$$lang}$$opts" : lyxrc.language_command_begin;
1403         string const lang_end_command = runparams.use_polyglossia ?
1404                 "\\end{$$lang}" : lyxrc.language_command_end;
1405         bool const using_begin_end = runparams.use_polyglossia ||
1406                                         !lang_end_command.empty();
1407
1408         if (maintext && !lyxrc.language_auto_begin &&
1409             !mainlang.empty()) {
1410                 // FIXME UNICODE
1411                 string bc = runparams.use_polyglossia ?
1412                             getPolyglossiaBegin(lang_begin_command, mainlang,
1413                                                 bparams.language->polyglossiaOpts())
1414                           : subst(lang_begin_command, "$$lang", mainlang);
1415                 os << bc;
1416                 os << '\n';
1417                 if (using_begin_end)
1418                         pushLanguageName(mainlang);
1419         }
1420
1421         ParagraphList const & paragraphs = text.paragraphs();
1422
1423         if (runparams.par_begin == runparams.par_end) {
1424                 // The full doc will be exported but it is easier to just rely on
1425                 // runparams range parameters that will be passed TeXEnvironment.
1426                 runparams.par_begin = 0;
1427                 runparams.par_end = paragraphs.size();
1428         }
1429
1430         pit_type pit = runparams.par_begin;
1431         // lastpit is for the language check after the loop.
1432         pit_type lastpit = pit;
1433         // variables used in the loop:
1434         bool was_title = false;
1435         bool already_title = false;
1436         DocumentClass const & tclass = bparams.documentClass();
1437
1438         // Did we already warn about inTitle layout mixing? (we only warn once)
1439         bool gave_layout_warning = false;
1440         for (; pit < runparams.par_end; ++pit) {
1441                 lastpit = pit;
1442                 ParagraphList::const_iterator par = paragraphs.constIterator(pit);
1443
1444                 // FIXME This check should not be needed. We should
1445                 // perhaps issue an error if it is.
1446                 Layout const & layout = text.inset().forcePlainLayout() ?
1447                                 tclass.plainLayout() : par->layout();
1448
1449                 if (layout.intitle) {
1450                         if (already_title) {
1451                                 if (!gave_layout_warning && !runparams.dryrun) {
1452                                         gave_layout_warning = true;
1453                                         frontend::Alert::warning(_("Error in latexParagraphs"),
1454                                                         bformat(_("You are using at least one "
1455                                                           "layout (%1$s) intended for the title, "
1456                                                           "after using non-title layouts. This "
1457                                                           "could lead to missing or incorrect output."
1458                                                           ), layout.name()));
1459                                 }
1460                         } else if (!was_title) {
1461                                 was_title = true;
1462                                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1463                                         os << "\\begin{"
1464                                                         << from_ascii(tclass.titlename())
1465                                                         << "}\n";
1466                                 }
1467                         }
1468                 } else if (was_title && !already_title && !layout.inpreamble) {
1469                         if (tclass.titletype() == TITLE_ENVIRONMENT) {
1470                                 os << "\\end{" << from_ascii(tclass.titlename())
1471                                                 << "}\n";
1472                         }
1473                         else {
1474                                 os << "\\" << from_ascii(tclass.titlename())
1475                                                 << "\n";
1476                         }
1477                         already_title = true;
1478                         was_title = false;
1479                 }
1480
1481                 if (layout.isCommand() && !layout.latexname().empty()
1482                     && layout.latexname() == bparams.multibib) {
1483                         if (runparams.openbtUnit)
1484                                 os << "\\end{btUnit}\n";
1485                         if (!bparams.useBiblatex()) {
1486                                 os << '\n' << "\\begin{btUnit}\n";
1487                                 runparams.openbtUnit = true;
1488                         }
1489                 }
1490
1491                 if (!layout.isEnvironment() && par->params().leftIndent().zero()) {
1492                         // This is a standard top level paragraph, TeX it and continue.
1493                         TeXOnePar(buf, text, pit, os, runparams, everypar);
1494                         continue;
1495                 }
1496
1497                 TeXEnvironmentData const data =
1498                         prepareEnvironment(buf, text, par, os, runparams);
1499                 // pit can be changed in TeXEnvironment.
1500                 TeXEnvironment(buf, text, runparams, pit, os);
1501                 finishEnvironment(os, runparams, data);
1502         }
1503
1504         if (pit == runparams.par_end) {
1505                         // Make sure that the last paragraph is
1506                         // correctly terminated (because TeXOnePar does
1507                         // not add a \n in this case)
1508                         //os << '\n';
1509         }
1510
1511         // It might be that we only have a title in this document
1512         if (was_title && !already_title) {
1513                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1514                         os << "\\end{" << from_ascii(tclass.titlename())
1515                            << "}\n";
1516                 } else {
1517                         os << "\\" << from_ascii(tclass.titlename())
1518                            << "\n";
1519                 }
1520         }
1521
1522         if (maintext && !is_child && runparams.openbtUnit)
1523                 os << "\\end{btUnit}\n";
1524
1525         // if "auto end" is switched off, explicitly close the language at the end
1526         // but only if the last par is in a babel or polyglossia language
1527         if (maintext && !lyxrc.language_auto_end && !mainlang.empty() &&
1528                 paragraphs.at(lastpit).getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
1529                 os << from_utf8(subst(lang_end_command,
1530                                         "$$lang",
1531                                         mainlang))
1532                         << '\n';
1533                 if (using_begin_end)
1534                         popLanguageName();
1535         }
1536
1537         // If the last paragraph is an environment, we'll have to close
1538         // CJK at the very end to do proper nesting.
1539         if (maintext && !is_child && state->open_encoding_ == CJK) {
1540                 os << "\\end{CJK}\n";
1541                 state->open_encoding_ = none;
1542         }
1543         // Likewise for polyglossia or when using begin/end commands
1544         string const & cur_lang = openLanguageName(state);
1545         if (maintext && !is_child && !cur_lang.empty()) {
1546                 os << from_utf8(subst(lang_end_command,
1547                                         "$$lang",
1548                                         cur_lang))
1549                    << '\n';
1550                 if (using_begin_end)
1551                         popLanguageName();
1552         }
1553
1554         // reset inherited encoding
1555         if (state->cjk_inherited_ > 0) {
1556                 state->cjk_inherited_ -= 1;
1557                 if (state->cjk_inherited_ == 0)
1558                         state->open_encoding_ = CJK;
1559         }
1560
1561         if (multibib_child && mparams.useBibtopic()) {
1562                 os << "\\end{btUnit}\n";
1563                 runparams.openbtUnit = false;
1564         }
1565 }
1566
1567
1568 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
1569                    OutputParams const & runparams, Encoding const & newEnc,
1570                    bool force, bool noswitchmacro)
1571 {
1572         // XeTeX/LuaTeX use only one encoding per document:
1573         // * with useNonTeXFonts: "utf8plain",
1574         // * with XeTeX and TeX fonts: "ascii" (inputenc fails),
1575         // * with LuaTeX and TeX fonts: only one encoding accepted by luainputenc.
1576         if (runparams.isFullUnicode() || newEnc.name() == "inherit")
1577                 return make_pair(false, 0);
1578
1579         Encoding const & oldEnc = *runparams.encoding;
1580         bool moving_arg = runparams.moving_arg;
1581         // If we switch from/to CJK, we need to switch anyway, despite custom inputenc
1582         bool const from_to_cjk =
1583                 (oldEnc.package() == Encoding::CJK && newEnc.package() != Encoding::CJK)
1584                 || (oldEnc.package() != Encoding::CJK && newEnc.package() == Encoding::CJK);
1585         if (!force && !from_to_cjk
1586             && ((bparams.inputenc != "auto" && bparams.inputenc != "default") || moving_arg))
1587                 return make_pair(false, 0);
1588
1589         // Do nothing if the encoding is unchanged.
1590         if (oldEnc.name() == newEnc.name())
1591                 return make_pair(false, 0);
1592
1593         // FIXME We ignore encoding switches from/to encodings that do
1594         // neither support the inputenc package nor the CJK package here.
1595         // This does of course only work in special cases (e.g. switch from
1596         // tis620-0 to latin1, but the text in latin1 contains ASCII only),
1597         // but it is the best we can do
1598         if (oldEnc.package() == Encoding::none
1599                 || newEnc.package() == Encoding::none)
1600                 return make_pair(false, 0);
1601
1602         LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
1603                 << oldEnc.name() << " to " << newEnc.name());
1604         os << setEncoding(newEnc.iconvName());
1605         if (bparams.inputenc == "default")
1606                 return make_pair(true, 0);
1607
1608         docstring const inputenc_arg(from_ascii(newEnc.latexName()));
1609         OutputState * state = getOutputState();
1610         switch (newEnc.package()) {
1611                 case Encoding::none:
1612                 case Encoding::japanese:
1613                         // shouldn't ever reach here, see above
1614                         return make_pair(true, 0);
1615                 case Encoding::inputenc: {
1616                         int count = inputenc_arg.length();
1617                         if (oldEnc.package() == Encoding::CJK &&
1618                             state->open_encoding_ == CJK) {
1619                                 os << "\\end{CJK}";
1620                                 state->open_encoding_ = none;
1621                                 count += 9;
1622                         }
1623                         else if (oldEnc.package() == Encoding::inputenc &&
1624                                  state->open_encoding_ == inputenc) {
1625                                 os << "\\egroup";
1626                                 state->open_encoding_ = none;
1627                                 count += 7;
1628                         }
1629                         if (runparams.local_font != 0
1630                             &&  oldEnc.package() == Encoding::CJK) {
1631                                 // within insets, \inputenc switches need
1632                                 // to be embraced within \bgroup...\egroup;
1633                                 // else CJK fails.
1634                                 os << "\\bgroup";
1635                                 count += 7;
1636                                 state->open_encoding_ = inputenc;
1637                         }
1638                         // with the japanese option, inputenc is omitted.
1639                         if (runparams.use_japanese || noswitchmacro)
1640                                 return make_pair(true, count);
1641                         os << "\\inputencoding{" << inputenc_arg << '}';
1642                         return make_pair(true, count + 16);
1643                 }
1644                 case Encoding::CJK: {
1645                         int count = inputenc_arg.length();
1646                         if (oldEnc.package() == Encoding::CJK &&
1647                             state->open_encoding_ == CJK) {
1648                                 os << "\\end{CJK}";
1649                                 count += 9;
1650                         }
1651                         if (oldEnc.package() == Encoding::inputenc &&
1652                             state->open_encoding_ == inputenc) {
1653                                 os << "\\egroup";
1654                                 count += 7;
1655                         }
1656                         os << "\\begin{CJK}{" << inputenc_arg << "}{"
1657                            << from_ascii(bparams.fonts_cjk) << "}";
1658                         state->open_encoding_ = CJK;
1659                         return make_pair(true, count + 15);
1660                 }
1661         }
1662         // Dead code to avoid a warning:
1663         return make_pair(true, 0);
1664
1665 }
1666
1667 } // namespace lyx