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