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 "TextClass.h"
  27 #include "TexRow.h"
  28
  29 #include "insets/InsetBibitem.h"
  30 #include "insets/InsetArgument.h"
  31
  32 #include "support/lassert.h"
  33 #include "support/convert.h"
  34 #include "support/debug.h"
  35 #include "support/lstrings.h"
  36
  37 #include <algorithm>
  38 #include <boost/next_prior.hpp>
  39 #include <list>
  40
  41 using namespace std;
  42 using namespace lyx::support;
  43
  44
  45 namespace lyx {
  46
  47 namespace {
  48
  49 enum OpenEncoding {
  50         none,
  51         inputenc,
  52         CJK
  53 };
  54
  55 static int open_encoding_ = none;
  56 static int cjk_inherited_ = 0;
  57 Language const * prev_env_language_ = 0;
  58
  59
  60 string const getPolyglossiaEnvName(Language const * lang)
  61 {
  62         string result = lang->polyglossia();
  63         if (result == "arabic")
  64                 // exceptional spelling; see polyglossia docs.
  65                 result = "Arabic";
  66         return result;
  67 }
  68
  69
  70 struct TeXEnvironmentData
  71 {
  72         bool cjk_nested;
  73         Layout const * style;
  74         Language const * par_language;
  75         Encoding const * prev_encoding;
  76         bool leftindent_open;
  77 };
  78
  79
  80 static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
  81                                         Text const & text,
  82                                         ParagraphList::const_iterator pit,
  83                                         otexstream & os,
  84                                         OutputParams const & runparams)
  85 {
  86         TeXEnvironmentData data;
  87
  88         BufferParams const & bparams = buf.params();
  89
  90         // FIXME This test should not be necessary.
  91         // We should perhaps issue an error if it is.
  92         Layout const & style = text.inset().forcePlainLayout() ?
  93                 bparams.documentClass().plainLayout() : pit->layout();
  94
  95         ParagraphList const & paragraphs = text.paragraphs();
  96         ParagraphList::const_iterator const priorpit =
  97                 pit == paragraphs.begin() ? pit : boost::prior(pit);
  98
  99         bool const use_prev_env_language = prev_env_language_ != 0
 100                         && priorpit->layout().isEnvironment()
 101                         && (priorpit->getDepth() > pit->getDepth()
 102                             || (priorpit->getDepth() == pit->getDepth()
 103                                 && priorpit->layout() != pit->layout()));
 104
 105         data.prev_encoding = runparams.encoding;
 106         data.par_language = pit->getParLanguage(bparams);
 107         Language const * const doc_language = bparams.language;
 108         Language const * const prev_par_language =
 109                 (pit != paragraphs.begin())
 110                 ? (use_prev_env_language ? prev_env_language_
 111                                          : priorpit->getParLanguage(bparams))
 112                 : doc_language;
 113
 114         bool const use_polyglossia = runparams.use_polyglossia;
 115         string const par_lang = use_polyglossia ?
 116                 getPolyglossiaEnvName(data.par_language) : data.par_language->babel();
 117         string const prev_par_lang = use_polyglossia ?
 118                 getPolyglossiaEnvName(prev_par_language) : prev_par_language->babel();
 119         string const doc_lang = use_polyglossia ?
 120                 getPolyglossiaEnvName(doc_language) : doc_language->babel();
 121         string const lang_begin_command = use_polyglossia ?
 122                 "\\begin{$$lang}" : lyxrc.language_command_begin;
 123         string const lang_end_command = use_polyglossia ?
 124                 "\\end{$$lang}" : lyxrc.language_command_end;
 125
 126         if (par_lang != prev_par_lang) {
 127                 if (!lang_end_command.empty() &&
 128                     prev_par_lang != doc_lang &&
 129                     !prev_par_lang.empty()) {
 130                         os << from_ascii(subst(
 131                                 lang_end_command,
 132                                 "$$lang",
 133                                 prev_par_lang))
 134                           // the '%' is necessary to prevent unwanted whitespace
 135                           << "%\n";
 136                 }
 137
 138                 if ((lang_end_command.empty() ||
 139                     par_lang != doc_lang) &&
 140                     !par_lang.empty()) {
 141                         os << from_ascii(subst(
 142                                 lang_begin_command,
 143                                 "$$lang",
 144                                 par_lang));
 145                         if (use_polyglossia
 146                             && !data.par_language->polyglossiaOpts().empty())
 147                                         os << "["
 148                                            << from_ascii(data.par_language->polyglossiaOpts())
 149                                            << "]";
 150                           // the '%' is necessary to prevent unwanted whitespace
 151                         os << "%\n";
 152                 }
 153         }
 154
 155         data.leftindent_open = false;
 156         if (!pit->params().leftIndent().zero()) {
 157                 os << "\\begin{LyXParagraphLeftIndent}{"
 158                    << from_ascii(pit->params().leftIndent().asLatexString())
 159                    << "}\n";
 160                 data.leftindent_open = true;
 161         }
 162
 163         if (style.isEnvironment()) {
 164                 os << "\\begin{" << from_ascii(style.latexname()) << '}';
 165                 if (!style.latexargs().empty()) {
 166                         OutputParams rp = runparams;
 167                         rp.local_font = &pit->getFirstFontSettings(bparams);
 168                         latexArgInsets(paragraphs, pit, os, rp, style.latexargs());
 169                 }
 170                 if (style.latextype == LATEX_LIST_ENVIRONMENT) {
 171                         os << '{'
 172                            << pit->params().labelWidthString()
 173                            << "}\n";
 174                 } else if (style.labeltype == LABEL_BIBLIO) {
 175                         if (pit->params().labelWidthString().empty())
 176                                 os << '{' << bibitemWidest(buf, runparams) << "}\n";
 177                         else
 178                                 os << '{'
 179                                   << pit->params().labelWidthString()
 180                                   << "}\n";
 181                 } else
 182                         os << from_ascii(style.latexparam()) << '\n';
 183         }
 184         data.style = &style;
 185
 186         // in multilingual environments, the CJK tags have to be nested properly
 187         data.cjk_nested = false;
 188         if (data.par_language->encoding()->package() == Encoding::CJK &&
 189             open_encoding_ != CJK && pit->isMultiLingual(bparams)) {
 190                 if (prev_par_language->encoding()->package() == Encoding::CJK)
 191                         os << "\\begin{CJK}{" << from_ascii(data.par_language->encoding()->latexName())
 192                            << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
 193                 open_encoding_ = CJK;
 194                 data.cjk_nested = true;
 195         }
 196         return data;
 197 }
 198
 199
 200 static void finishEnvironment(otexstream & os, OutputParams const & runparams,
 201                                TeXEnvironmentData const & data)
 202 {
 203         if (open_encoding_ == CJK && data.cjk_nested) {
 204                 // We need to close the encoding even if it does not change
 205                 // to do correct environment nesting
 206                 os << "\\end{CJK}\n";
 207                 open_encoding_ = none;
 208         }
 209
 210         if (data.style->isEnvironment()) {
 211                 os << "\\end{" << from_ascii(data.style->latexname()) << "}\n";
 212                 prev_env_language_ = data.par_language;
 213                 if (runparams.encoding != data.prev_encoding) {
 214                         runparams.encoding = data.prev_encoding;
 215                         if (!runparams.isFullUnicode())
 216                                 os << setEncoding(data.prev_encoding->iconvName());
 217                 }
 218         }
 219
 220         if (data.leftindent_open) {
 221                 os << "\\end{LyXParagraphLeftIndent}\n";
 222                 prev_env_language_ = data.par_language;
 223                 if (runparams.encoding != data.prev_encoding) {
 224                         runparams.encoding = data.prev_encoding;
 225                         if (!runparams.isFullUnicode())
 226                                 os << setEncoding(data.prev_encoding->iconvName());
 227                 }
 228         }
 229 }
 230
 231
 232 void TeXEnvironment(Buffer const & buf, Text const & text,
 233                     OutputParams const & runparams,
 234                     pit_type & pit, otexstream & os)
 235 {
 236         ParagraphList const & paragraphs = text.paragraphs();
 237         ParagraphList::const_iterator par = paragraphs.constIterator(pit);
 238         LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << pit);
 239
 240         Layout const & current_layout = par->layout();
 241         depth_type const current_depth = par->params().depth();
 242         Length const & current_left_indent = par->params().leftIndent();
 243
 244         // This is for debugging purpose at the end.
 245         pit_type const par_begin = pit;
 246         for (; pit < runparams.par_end; ++pit) {
 247                 ParagraphList::const_iterator par = paragraphs.constIterator(pit);
 248
 249                 // check first if this is an higher depth paragraph.
 250                 bool go_out = (par->params().depth() < current_depth);
 251                 if (par->params().depth() == current_depth) {
 252                         // This environment is finished.
 253                         go_out |= (par->layout() != current_layout);
 254                         go_out |= (par->params().leftIndent() != current_left_indent);
 255                 }
 256                 if (go_out) {
 257                         // nothing to do here, restore pit and go out.
 258                         pit--;
 259                         break;
 260                 }
 261
 262                 if (par->layout() == current_layout
 263                         && par->params().depth() == current_depth
 264                         && par->params().leftIndent() == current_left_indent) {
 265                         // We are still in the same environment so TeXOnePar and continue;
 266                         TeXOnePar(buf, text, pit, os, runparams);
 267                         continue;
 268                 }
 269
 270                 // We are now in a deeper environment.
 271                 // Either par->layout() != current_layout
 272                 // Or     par->params().depth() > current_depth
 273                 // Or     par->params().leftIndent() != current_left_indent)
 274
 275                 if (par->layout().isParagraph()) {
 276                         // FIXME (Lgb): How to handle this?
 277                         //&& !suffixIs(os, "\n\n")
 278
 279                         // (ARRae) There should be at least one '\n' already but we need there to
 280                         // be two for Standard paragraphs that are depth-increment'ed to be
 281                         // output correctly. However, tables can also be paragraphs so
 282                         // don't adjust them.
 283
 284                         // FIXME (Lgb): Will it ever harm to have one '\n' too
 285                         // many? i.e. that we sometimes will have
 286                         // three in a row.
 287                         os << '\n';
 288                 }
 289
 290                 // FIXME This test should not be necessary.
 291                 // We should perhaps issue an error if it is.
 292                 bool const force_plain_layout = text.inset().forcePlainLayout();
 293                 Layout const & style = force_plain_layout
 294                         ? buf.params().documentClass().plainLayout()
 295                         : par->layout();
 296
 297                 if (!style.isEnvironment()) {
 298                         // This is a standard paragraph, no need to call TeXEnvironment.
 299                         TeXOnePar(buf, text, pit, os, runparams);
 300                         continue;
 301                 }
 302
 303                 // This is a new environment.
 304                 TeXEnvironmentData const data =
 305                         prepareEnvironment(buf, text, par, os, runparams);
 306                 // Recursive call to TeXEnvironment!
 307                 TeXEnvironment(buf, text, runparams, pit, os);
 308                 finishEnvironment(os, runparams, data);
 309         }
 310
 311         if (pit != runparams.par_end)
 312                 LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << par_begin << " done.");
 313 }
 314
 315
 316 void getArgInsets(otexstream & os, OutputParams const & runparams, Layout::LaTeXArgMap const & latexargs,
 317                   map<int, lyx::InsetArgument const *> ilist, vector<string> required, string const & prefix)
 318 {
 319         unsigned int const argnr = latexargs.size();
 320         if (argnr == 0)
 321                 return;
 322
 323         for (unsigned int i = 1; i <= argnr; ++i) {
 324                 map<int, InsetArgument const *>::const_iterator lit = ilist.find(i);
 325                 bool inserted = false;
 326                 if (lit != ilist.end()) {
 327                         InsetArgument const * ins = (*lit).second;
 328                         if (ins) {
 329                                 Layout::LaTeXArgMap::const_iterator const lait =
 330                                                 latexargs.find(ins->name());
 331                                 if (lait != latexargs.end()) {
 332                                         Layout::latexarg arg = (*lait).second;
 333                                         docstring ldelim = arg.mandatory ?
 334                                                         from_ascii("{") : from_ascii("[");
 335                                         docstring rdelim = arg.mandatory ?
 336                                                         from_ascii("}") : from_ascii("]");
 337                                         if (!arg.ldelim.empty())
 338                                                 ldelim = arg.ldelim;
 339                                         if (!arg.rdelim.empty())
 340                                                 rdelim = arg.rdelim;
 341                                         ins->latexArgument(os, runparams, ldelim, rdelim, arg.presetarg);
 342                                         inserted = true;
 343                                 }
 344                         }
 345                 }
 346                 if (!inserted) {
 347                         Layout::LaTeXArgMap::const_iterator lait = latexargs.begin();
 348                         Layout::LaTeXArgMap::const_iterator const laend = latexargs.end();
 349                         for (; lait != laend; ++lait) {
 350                                 string const name = prefix + convert<string>(i);
 351                                 if ((*lait).first == name) {
 352                                         Layout::latexarg arg = (*lait).second;
 353                                         if (arg.mandatory) {
 354                                                 docstring ldelim = arg.ldelim.empty() ?
 355                                                                 from_ascii("{") : arg.ldelim;
 356                                                 docstring rdelim = arg.rdelim.empty() ?
 357                                                                 from_ascii("}") : arg.rdelim;
 358                                                 os << ldelim << arg.presetarg << rdelim;
 359                                         } else if (!arg.presetarg.empty()) {
 360                                                 docstring ldelim = arg.mandatory ?
 361                                                                 from_ascii("{") : from_ascii("[");
 362                                                 docstring rdelim = arg.mandatory ?
 363                                                                 from_ascii("}") : from_ascii("]");
 364                                                 if (!arg.ldelim.empty())
 365                                                         ldelim = arg.ldelim;
 366                                                 if (!arg.rdelim.empty())
 367                                                         rdelim = arg.rdelim;
 368                                                 os << ldelim << arg.presetarg << rdelim;
 369                                         } else if (find(required.begin(), required.end(),
 370                                                    (*lait).first) != required.end()) {
 371                                                 docstring ldelim = arg.ldelim.empty() ?
 372                                                                 from_ascii("[") : arg.ldelim;
 373                                                 docstring rdelim = arg.rdelim.empty() ?
 374                                                                 from_ascii("]") : arg.rdelim;
 375                                                 os << ldelim << rdelim;
 376                                         } else
 377                                                 break;
 378                                 }
 379                         }
 380                 }
 381         }
 382 }
 383
 384
 385 } // namespace anon
 386
 387
 388 void latexArgInsets(Paragraph const & par, otexstream & os,
 389         OutputParams const & runparams, Layout::LaTeXArgMap const & latexargs, string const & prefix)
 390 {
 391         map<int, InsetArgument const *> ilist;
 392         vector<string> required;
 393
 394         InsetList::const_iterator it = par.insetList().begin();
 395         InsetList::const_iterator end = par.insetList().end();
 396         for (; it != end; ++it) {
 397                 if (it->inset->lyxCode() == ARG_CODE) {
 398                         InsetArgument const * ins =
 399                                 static_cast<InsetArgument const *>(it->inset);
 400                         if (ins->name().empty())
 401                                 LYXERR0("Error: Unnamed argument inset!");
 402                         else {
 403                                 string const name = prefix.empty() ? ins->name() : split(ins->name(), ':');
 404                                 unsigned int const nr = convert<unsigned int>(name);
 405                                 ilist[nr] = ins;
 406                                 Layout::LaTeXArgMap::const_iterator const lit =
 407                                                 latexargs.find(ins->name());
 408                                 if (lit != latexargs.end()) {
 409                                         Layout::latexarg const & arg = (*lit).second;
 410                                         if (!arg.requires.empty()) {
 411                                                 vector<string> req = getVectorFromString(arg.requires);
 412                                                 required.insert(required.end(), req.begin(), req.end());
 413                                         }
 414                                 }
 415                         }
 416                 }
 417         }
 418         getArgInsets(os, runparams, latexargs, ilist, required, prefix);
 419 }
 420
 421
 422 void latexArgInsets(ParagraphList const & pars, ParagraphList::const_iterator pit,
 423         otexstream & os, OutputParams const & runparams, Layout::LaTeXArgMap const & latexargs,
 424         string const & prefix)
 425 {
 426         map<int, InsetArgument const *> ilist;
 427         vector<string> required;
 428
 429         depth_type const current_depth = pit->params().depth();
 430         Layout const current_layout = pit->layout();
 431
 432         // get the first paragraph in sequence with this layout and depth
 433         pit_type offset = 0;
 434         while (true) {
 435                 if (boost::prior(pit, offset) == pars.begin())
 436                         break;
 437                 ParagraphList::const_iterator priorpit = boost::prior(pit, offset + 1);
 438                 if (priorpit->layout() == current_layout
 439                     && priorpit->params().depth() == current_depth)
 440                         ++offset;
 441                 else
 442                         break;
 443         }
 444
 445         ParagraphList::const_iterator spit = boost::prior(pit, offset);
 446
 447         for (; spit != pars.end(); ++spit) {
 448                 if (spit->layout() != current_layout || spit->params().depth() < current_depth)
 449                         break;
 450                 if (spit->params().depth() > current_depth)
 451                         continue;
 452                 InsetList::const_iterator it = spit->insetList().begin();
 453                 InsetList::const_iterator end = spit->insetList().end();
 454                 for (; it != end; ++it) {
 455                         if (it->inset->lyxCode() == ARG_CODE) {
 456                                 InsetArgument const * ins =
 457                                         static_cast<InsetArgument const *>(it->inset);
 458                                 if (ins->name().empty())
 459                                         LYXERR0("Error: Unnamed argument inset!");
 460                                 else {
 461                                         string const name = prefix.empty() ? ins->name() : split(ins->name(), ':');
 462                                         unsigned int const nr = convert<unsigned int>(name);
 463                                         if (ilist.find(nr) == ilist.end())
 464                                                 ilist[nr] = ins;
 465                                         Layout::LaTeXArgMap::const_iterator const lit =
 466                                                         latexargs.find(ins->name());
 467                                         if (lit != latexargs.end()) {
 468                                                 Layout::latexarg const & arg = (*lit).second;
 469                                                 if (!arg.requires.empty()) {
 470                                                         vector<string> req = getVectorFromString(arg.requires);
 471                                                         required.insert(required.end(), req.begin(), req.end());
 472                                                 }
 473                                         }
 474                                 }
 475                         }
 476                 }
 477         }
 478         getArgInsets(os, runparams, latexargs, ilist, required, prefix);
 479 }
 480
 481 namespace {
 482
 483 // output the proper paragraph start according to latextype.
 484 void parStartCommand(Paragraph const & par, otexstream & os,
 485                      OutputParams const & runparams, Layout const & style)
 486 {
 487         switch (style.latextype) {
 488         case LATEX_COMMAND:
 489                 os << '\\' << from_ascii(style.latexname());
 490
 491                 // Command arguments
 492                 if (!style.latexargs().empty())
 493                         latexArgInsets(par, os, runparams, style.latexargs());
 494                 os << from_ascii(style.latexparam());
 495                 break;
 496         case LATEX_ITEM_ENVIRONMENT:
 497         case LATEX_LIST_ENVIRONMENT:
 498                 os << "\\" + style.itemcommand();
 499                 // Item arguments
 500                 if (!style.itemargs().empty())
 501                         latexArgInsets(par, os, runparams, style.itemargs(), "item:");
 502                 os << " ";
 503                 break;
 504         case LATEX_BIB_ENVIRONMENT:
 505                 // ignore this, the inset will write itself
 506                 break;
 507         default:
 508                 break;
 509         }
 510 }
 511
 512 } // namespace anon
 513
 514 // FIXME: this should be anonymous
 515 void TeXOnePar(Buffer const & buf,
 516                Text const & text,
 517                pit_type pit,
 518                otexstream & os,
 519                OutputParams const & runparams_in,
 520                string const & everypar,
 521                int start_pos, int end_pos)
 522 {
 523         BufferParams const & bparams = buf.params();
 524         ParagraphList const & paragraphs = text.paragraphs();
 525         Paragraph const & par = paragraphs.at(pit);
 526         // FIXME This check should not really be needed.
 527         // Perhaps we should issue an error if it is.
 528         Layout const style = text.inset().forcePlainLayout() ?
 529                 bparams.documentClass().plainLayout() : par.layout();
 530
 531         if (style.inpreamble)
 532                 return;
 533
 534         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " ptr " << &par << " '"
 535                 << everypar << "'");
 536
 537         OutputParams runparams = runparams_in;
 538         runparams.isLastPar = (pit == pit_type(paragraphs.size() - 1));
 539         // We reinitialze par begin and end to be on the safe side
 540         // with embedded inset as we don't know if they set those
 541         // value correctly.
 542         runparams.par_begin = 0;
 543         runparams.par_end = 0;
 544
 545         bool const maintext = text.isMainText();
 546         // we are at the beginning of an inset and CJK is already open;
 547         // we count inheritation levels to get the inset nesting right.
 548         if (pit == 0 && !maintext
 549             && (cjk_inherited_ > 0 || open_encoding_ == CJK)) {
 550                 cjk_inherited_ += 1;
 551                 open_encoding_ = none;
 552         }
 553
 554         if (text.inset().isPassThru()) {
 555                 Font const outerfont = text.outerFont(pit);
 556
 557                 // No newline before first paragraph in this lyxtext
 558                 if (pit > 0) {
 559                         os << '\n';
 560                         if (!text.inset().getLayout().parbreakIsNewline())
 561                                 os << '\n';
 562                 }
 563
 564                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 565                 return;
 566         }
 567
 568         Paragraph const * nextpar = runparams.isLastPar
 569                 ? 0 : &paragraphs.at(pit + 1);
 570
 571         if (style.pass_thru) {
 572                 Font const outerfont = text.outerFont(pit);
 573                 runparams.local_font = &par.getFirstFontSettings(bparams);
 574                 parStartCommand(par, os, runparams, style);
 575
 576                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 577
 578                 // I did not create a parEndCommand for this minuscule
 579                 // task because in the other user of parStartCommand
 580                 // the code is different (JMarc)
 581                 if (style.isCommand())
 582                         os << "}\n";
 583                 else
 584                         os << '\n';
 585                 if (!style.parbreak_is_newline) {
 586                         os << '\n';
 587                 } else if (nextpar) {
 588                         Layout const nextstyle = text.inset().forcePlainLayout()
 589                                 ? bparams.documentClass().plainLayout()
 590                                 : nextpar->layout();
 591                         if (nextstyle.name() != style.name())
 592                                 os << '\n';
 593                 }
 594
 595                 return;
 596         }
 597
 598         // This paragraph's language
 599         Language const * const par_language = par.getParLanguage(bparams);
 600         // The document's language
 601         Language const * const doc_language = bparams.language;
 602         // The language that was in effect when the environment this paragraph is
 603         // inside of was opened
 604         Language const * const outer_language =
 605                 (runparams.local_font != 0) ?
 606                         runparams.local_font->language() : doc_language;
 607
 608         Paragraph const * priorpar = (pit == 0) ? 0 : &paragraphs.at(pit - 1);
 609
 610         // The previous language that was in effect is the language of the
 611         // previous paragraph, unless the previous paragraph is inside an
 612         // environment with nesting depth greater than (or equal to, but with
 613         // a different layout) the current one. If there is no previous
 614         // paragraph, the previous language is the outer language.
 615         bool const use_prev_env_language = prev_env_language_ != 0
 616                         && priorpar
 617                         && priorpar->layout().isEnvironment()
 618                         && (priorpar->getDepth() > par.getDepth()
 619                             || (priorpar->getDepth() == par.getDepth()
 620                                     && priorpar->layout() != par.layout()));
 621         Language const * const prev_language =
 622                 (pit != 0)
 623                 ? (use_prev_env_language ? prev_env_language_
 624                                          : priorpar->getParLanguage(bparams))
 625                 : outer_language;
 626
 627
 628         bool const use_polyglossia = runparams.use_polyglossia;
 629         string const par_lang = use_polyglossia ?
 630                 getPolyglossiaEnvName(par_language): par_language->babel();
 631         string const prev_lang = use_polyglossia ?
 632                 getPolyglossiaEnvName(prev_language) : prev_language->babel();
 633         string const doc_lang = use_polyglossia ?
 634                 getPolyglossiaEnvName(doc_language) : doc_language->babel();
 635         string const outer_lang = use_polyglossia ?
 636                 getPolyglossiaEnvName(outer_language) : outer_language->babel();
 637         string lang_begin_command = use_polyglossia ?
 638                 "\\begin{$$lang}" : lyxrc.language_command_begin;
 639         string lang_end_command = use_polyglossia ?
 640                 "\\end{$$lang}" : lyxrc.language_command_end;
 641         // the '%' is necessary to prevent unwanted whitespace
 642         string lang_command_termination = "%\n";
 643
 644         // In some insets (such as Arguments), we cannot use \selectlanguage
 645         bool const localswitch = !use_polyglossia
 646                 && text.inset().getLayout().forcelocalfontswitch();
 647         if (localswitch) {
 648                 lang_begin_command = lyxrc.language_command_local;
 649                 lang_end_command = "}";
 650                 lang_command_termination.clear();
 651         }
 652
 653         if (par_lang != prev_lang
 654                 // check if we already put language command in TeXEnvironment()
 655                 && !(style.isEnvironment()
 656                      && (pit == 0 || (priorpar->layout() != par.layout()
 657                                           && priorpar->getDepth() <= par.getDepth())
 658                                   || priorpar->getDepth() < par.getDepth())))
 659         {
 660                 if (!lang_end_command.empty() &&
 661                     prev_lang != outer_lang &&
 662                     !prev_lang.empty())
 663                 {
 664                         os << from_ascii(subst(lang_end_command,
 665                                 "$$lang",
 666                                 prev_lang))
 667                            << lang_command_termination;
 668                 }
 669
 670                 // We need to open a new language if we couldn't close the previous
 671                 // one (because there's no language_command_end); and even if we closed
 672                 // the previous one, if the current language is different than the
 673                 // outer_language (which is currently in effect once the previous one
 674                 // is closed).
 675                 if ((lang_end_command.empty() || par_lang != outer_lang)
 676                         && !par_lang.empty()) {
 677                         // If we're inside an inset, and that inset is within an \L or \R
 678                         // (or equivalents), then within the inset, too, any opposite
 679                         // language paragraph should appear within an \L or \R (in addition
 680                         // to, outside of, the normal language switch commands).
 681                         // This behavior is not correct for ArabTeX, though.
 682                         if (!use_polyglossia
 683                             // not for ArabTeX
 684                                 && par_language->lang() != "arabic_arabtex"
 685                                 && outer_language->lang() != "arabic_arabtex"
 686                             // are we in an inset?
 687                             && runparams.local_font != 0
 688                             // is the inset within an \L or \R?
 689                             //
 690                             // FIXME: currently, we don't check this; this means that
 691                             // we'll have unnnecessary \L and \R commands, but that
 692                             // doesn't seem to hurt (though latex will complain)
 693                             //
 694                             // is this paragraph in the opposite direction?
 695                             && runparams.local_font->isRightToLeft() != par_language->rightToLeft()) {
 696                                 // FIXME: I don't have a working copy of the Arabi package, so
 697                                 // I'm not sure if the farsi and arabic_arabi stuff is correct
 698                                 // or not...
 699                                 if (par_language->lang() == "farsi")
 700                                         os << "\\textFR{";
 701                                 else if (outer_language->lang() == "farsi")
 702                                         os << "\\textLR{";
 703                                 else if (par_language->lang() == "arabic_arabi")
 704                                         os << "\\textAR{";
 705                                 else if (outer_language->lang() == "arabic_arabi")
 706                                         os << "\\textLR{";
 707                                 // remaining RTL languages currently is hebrew
 708                                 else if (par_language->rightToLeft())
 709                                         os << "\\R{";
 710                                 else
 711                                         os << "\\L{";
 712                         }
 713                         // With CJK, the CJK tag has to be closed first (see below)
 714                         if (runparams.encoding->package() != Encoding::CJK
 715                             && !par_lang.empty()) {
 716                                 os << from_ascii(subst(
 717                                         lang_begin_command,
 718                                         "$$lang",
 719                                         par_lang));
 720                                 if (use_polyglossia
 721                                     && !par_language->polyglossiaOpts().empty())
 722                                                 os << "["
 723                                                   << from_ascii(par_language->polyglossiaOpts())
 724                                                   << "]";
 725                                 os << lang_command_termination;
 726                         }
 727                 }
 728         }
 729
 730         // Switch file encoding if necessary; no need to do this for "default"
 731         // encoding, since this only affects the position of the outputted
 732         // \inputencoding command; the encoding switch will occur when necessary
 733         if (bparams.inputenc == "auto"
 734                 && runparams.encoding->package() != Encoding::none) {
 735                 // Look ahead for future encoding changes.
 736                 // We try to output them at the beginning of the paragraph,
 737                 // since the \inputencoding command is not allowed e.g. in
 738                 // sections. For this reason we only set runparams.moving_arg
 739                 // after checking for the encoding change, otherwise the
 740                 // change would be always avoided by switchEncoding().
 741                 for (pos_type i = 0; i < par.size(); ++i) {
 742                         char_type const c = par.getChar(i);
 743                         Encoding const * const encoding =
 744                                 par.getFontSettings(bparams, i).language()->encoding();
 745                         if (encoding->package() != Encoding::CJK
 746                                 && runparams.encoding->package() == Encoding::inputenc
 747                                 && c < 0x80)
 748                                 continue;
 749                         if (par.isInset(i))
 750                                 break;
 751                         // All characters before c are in the ASCII range, and
 752                         // c is non-ASCII (but no inset), so change the
 753                         // encoding to that required by the language of c.
 754                         // With CJK, only add switch if we have CJK content at the beginning
 755                         // of the paragraph
 756                         if (i != 0 && encoding->package() == Encoding::CJK)
 757                                 continue;
 758
 759                         pair<bool, int> enc_switch = switchEncoding(os.os(),
 760                                                 bparams, runparams, *encoding);
 761                         // the following is necessary after a CJK environment in a multilingual
 762                         // context (nesting issue).
 763                         if (par_language->encoding()->package() == Encoding::CJK
 764                                 && open_encoding_ != CJK && cjk_inherited_ == 0) {
 765                                 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 766                                    << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
 767                                 open_encoding_ = CJK;
 768                         }
 769                         if (encoding->package() != Encoding::none && enc_switch.first) {
 770                                 if (enc_switch.second > 0) {
 771                                         // the '%' is necessary to prevent unwanted whitespace
 772                                         os << "%\n";
 773                                 }
 774                                 // With CJK, the CJK tag had to be closed first (see above)
 775                                 if (runparams.encoding->package() == Encoding::CJK
 776                                     && !par_lang.empty()) {
 777                                         os << from_ascii(subst(
 778                                                 lang_begin_command,
 779                                                 "$$lang",
 780                                                 par_lang))
 781                                         << lang_command_termination;
 782                                 }
 783                                 runparams.encoding = encoding;
 784                         }
 785                         break;
 786                 }
 787         }
 788
 789         runparams.moving_arg |= style.needprotect;
 790         Encoding const * const prev_encoding = runparams.encoding;
 791
 792         bool const useSetSpace = bparams.documentClass().provides("SetSpace");
 793         if (par.allowParagraphCustomization()) {
 794                 if (par.params().startOfAppendix()) {
 795                         os << "\\appendix\n";
 796                 }
 797
 798                 if (!par.params().spacing().isDefault()
 799                         && (pit == 0 || !priorpar->hasSameLayout(par)))
 800                 {
 801                         os << from_ascii(par.params().spacing().writeEnvirBegin(useSetSpace))
 802                             << '\n';
 803                 }
 804
 805                 if (style.isCommand()) {
 806                         os << '\n';
 807                 }
 808         }
 809
 810         runparams.local_font = &par.getFirstFontSettings(bparams);
 811         parStartCommand(par, os, runparams, style);
 812         Font const outerfont = text.outerFont(pit);
 813
 814         // FIXME UNICODE
 815         os << from_utf8(everypar);
 816         par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 817
 818         // Make sure that \\par is done with the font of the last
 819         // character if this has another size as the default.
 820         // This is necessary because LaTeX (and LyX on the screen)
 821         // calculates the space between the baselines according
 822         // to this font. (Matthias)
 823         //
 824         // Is this really needed ? (Dekel)
 825         // We do not need to use to change the font for the last paragraph
 826         // or for a command.
 827
 828         Font const font = par.empty()
 829                  ? par.getLayoutFont(bparams, outerfont)
 830                  : par.getFont(bparams, par.size() - 1, outerfont);
 831
 832         bool const is_command = style.isCommand();
 833
 834         if (style.resfont.size() != font.fontInfo().size()
 835             && nextpar
 836             && !is_command) {
 837                 os << '{';
 838                 os << "\\" << from_ascii(font.latexSize()) << " \\par}";
 839         } else if (is_command) {
 840                 os << '}';
 841                 if (!style.postcommandargs().empty())
 842                         latexArgInsets(par, os, runparams, style.postcommandargs(), "post:");
 843                 if (runparams.encoding != prev_encoding) {
 844                         runparams.encoding = prev_encoding;
 845                         if (!runparams.isFullUnicode())
 846                                 os << setEncoding(prev_encoding->iconvName());
 847                 }
 848         }
 849
 850         bool pending_newline = false;
 851         bool unskip_newline = false;
 852         switch (style.latextype) {
 853         case LATEX_ITEM_ENVIRONMENT:
 854         case LATEX_LIST_ENVIRONMENT:
 855                 if (nextpar && (par.params().depth() < nextpar->params().depth()))
 856                         pending_newline = true;
 857                 break;
 858         case LATEX_ENVIRONMENT: {
 859                 // if its the last paragraph of the current environment
 860                 // skip it otherwise fall through
 861                 if (nextpar
 862                         && (nextpar->layout() != par.layout()
 863                         || nextpar->params().depth() != par.params().depth()))
 864                         break;
 865         }
 866
 867         // fall through possible
 868         default:
 869                 // we don't need it for the last paragraph!!!
 870                 if (nextpar)
 871                         pending_newline = true;
 872         }
 873
 874         if (par.allowParagraphCustomization()) {
 875                 if (!par.params().spacing().isDefault()
 876                         && (runparams.isLastPar || !nextpar->hasSameLayout(par))) {
 877                         if (pending_newline)
 878                                 os << '\n';
 879                         os << from_ascii(par.params().spacing().writeEnvirEnd(useSetSpace));
 880                         pending_newline = true;
 881                 }
 882         }
 883
 884         // Closing the language is needed for the last paragraph; it is also
 885         // needed if we're within an \L or \R that we may have opened above (not
 886         // necessarily in this paragraph) and are about to close.
 887         bool closing_rtl_ltr_environment = !use_polyglossia
 888                 // not for ArabTeX
 889                 && (par_language->lang() != "arabic_arabtex"
 890                     && outer_language->lang() != "arabic_arabtex")
 891                      // have we opened and \L or \R environment?
 892                 && runparams.local_font != 0
 893                 && runparams.local_font->isRightToLeft() != par_language->rightToLeft()
 894                 // are we about to close the language?
 895                 &&((nextpar && par_language->babel() != (nextpar->getParLanguage(bparams))->babel())
 896                    || (runparams.isLastPar && par_language->babel() != outer_language->babel()));
 897
 898         if (closing_rtl_ltr_environment
 899             || (runparams.isLastPar
 900                 && ((!use_polyglossia && par_language->babel() != outer_language->babel())
 901                     || (use_polyglossia && par_language->polyglossia() != outer_language->polyglossia())))) {
 902                 // Since \selectlanguage write the language to the aux file,
 903                 // we need to reset the language at the end of footnote or
 904                 // float.
 905
 906                 if (pending_newline)
 907                         os << '\n';
 908
 909                 // when the paragraph uses CJK, the language has to be closed earlier
 910                 if (font.language()->encoding()->package() != Encoding::CJK) {
 911                         if (lang_end_command.empty()) {
 912                                 // If this is a child, we should restore the
 913                                 // master language after the last paragraph.
 914                                 Language const * const current_language =
 915                                         (runparams.isLastPar && runparams.master_language)
 916                                                 ? runparams.master_language
 917                                                 : outer_language;
 918                                 string const current_lang = use_polyglossia
 919                                         ? getPolyglossiaEnvName(current_language)
 920                                         : current_language->babel();
 921                                 if (!current_lang.empty()) {
 922                                         os << from_ascii(subst(
 923                                                 lang_begin_command,
 924                                                 "$$lang",
 925                                                 current_lang));
 926                                         pending_newline = !localswitch;
 927                                         unskip_newline = !localswitch;
 928                                 }
 929                         } else if (!par_lang.empty()) {
 930                                 os << from_ascii(subst(
 931                                         lang_end_command,
 932                                         "$$lang",
 933                                         par_lang));
 934                                 pending_newline = !localswitch;
 935                                 unskip_newline = !localswitch;
 936                         }
 937                 }
 938         }
 939         if (closing_rtl_ltr_environment)
 940                 os << "}";
 941
 942         if (pending_newline) {
 943                 if (unskip_newline)
 944                         // prevent unwanted whitespace
 945                         os << '%';
 946                 os << '\n';
 947         }
 948
 949         // if this is a CJK-paragraph and the next isn't, close CJK
 950         // also if the next paragraph is a multilingual environment (because of nesting)
 951         if (nextpar
 952                 && open_encoding_ == CJK
 953                 && (nextpar->getParLanguage(bparams)->encoding()->package() != Encoding::CJK
 954                    || (nextpar->layout().isEnvironment() && nextpar->isMultiLingual(bparams)))
 955                 // inbetween environments, CJK has to be closed later (nesting!)
 956                 && (!style.isEnvironment() || !nextpar->layout().isEnvironment())) {
 957                 os << "\\end{CJK}\n";
 958                 open_encoding_ = none;
 959         }
 960
 961         // If this is the last paragraph, close the CJK environment
 962         // if necessary. If it's an environment, we'll have to \end that first.
 963         if (runparams.isLastPar && !style.isEnvironment()) {
 964                 switch (open_encoding_) {
 965                         case CJK: {
 966                                 // do nothing at the end of child documents
 967                                 if (maintext && buf.masterBuffer() != &buf)
 968                                         break;
 969                                 // end of main text
 970                                 if (maintext) {
 971                                         os << "\n\\end{CJK}\n";
 972                                 // end of an inset
 973                                 } else
 974                                         os << "\\end{CJK}";
 975                                 open_encoding_ = none;
 976                                 break;
 977                         }
 978                         case inputenc: {
 979                                 os << "\\egroup";
 980                                 open_encoding_ = none;
 981                                 break;
 982                         }
 983                         case none:
 984                         default:
 985                                 // do nothing
 986                                 break;
 987                 }
 988         }
 989
 990         // If this is the last paragraph, and a local_font was set upon entering
 991         // the inset, and we're using "auto" or "default" encoding, the encoding
 992         // should be set back to that local_font's encoding.
 993         // However, do not change the encoding when a fully unicode aware backend
 994         // such as XeTeX is used.
 995         if (runparams.isLastPar && runparams_in.local_font != 0
 996             && runparams_in.encoding != runparams_in.local_font->language()->encoding()
 997             && (bparams.inputenc == "auto" || bparams.inputenc == "default")
 998             && (!runparams.isFullUnicode())) {
 999                 runparams_in.encoding = runparams_in.local_font->language()->encoding();
1000                 os << setEncoding(runparams_in.encoding->iconvName());
1001         }
1002         // Otherwise, the current encoding should be set for the next paragraph.
1003         else
1004                 runparams_in.encoding = runparams.encoding;
1005
1006
1007         // we don't need a newline for the last paragraph!!!
1008         // Note from JMarc: we will re-add a \n explicitly in
1009         // TeXEnvironment, because it is needed in this case
1010         if (nextpar) {
1011                 Layout const & next_layout = nextpar->layout();
1012                 if (style == next_layout
1013                     // no blank lines before environments!
1014                     || !next_layout.isEnvironment()
1015                     // unless there's a depth change
1016                     // FIXME What we really want to do here is put every \begin and \end
1017                     // tag on a new line (which was not the case with nested environments).
1018                     // But in the present state of play, we don't have access to the
1019                     // information whether the current TeX row is empty or not.
1020                     // For some ideas about how to fix this, see this thread:
1021                     // http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg145787.html
1022                     || nextpar->params().depth() != par.params().depth()) {
1023                         os << '\n';
1024                 }
1025         }
1026
1027         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " done; ptr "
1028                 << &par << " next " << nextpar);
1029
1030         return;
1031 }
1032
1033
1034 // LaTeX all paragraphs
1035 void latexParagraphs(Buffer const & buf,
1036                      Text const & text,
1037                      otexstream & os,
1038                      OutputParams const & runparams,
1039                      string const & everypar)
1040 {
1041         BufferParams const & bparams = buf.params();
1042
1043         bool const maintext = text.isMainText();
1044         bool const is_child = buf.masterBuffer() != &buf;
1045
1046         // Open a CJK environment at the beginning of the main buffer
1047         // if the document's language is a CJK language
1048         // (but not in child documents)
1049         if (maintext && !is_child
1050             && bparams.encoding().package() == Encoding::CJK) {
1051                 os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
1052                 << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
1053                 open_encoding_ = CJK;
1054         }
1055         // if "auto begin" is switched off, explicitly switch the
1056         // language on at start
1057         string const mainlang = runparams.use_polyglossia
1058                 ? getPolyglossiaEnvName(bparams.language)
1059                 : bparams.language->babel();
1060         string const lang_begin_command = runparams.use_polyglossia ?
1061                 "\\begin{$$lang}" : lyxrc.language_command_begin;
1062
1063         if (maintext && !lyxrc.language_auto_begin &&
1064             !mainlang.empty()) {
1065                 // FIXME UNICODE
1066                 os << from_utf8(subst(lang_begin_command,
1067                                         "$$lang",
1068                                         mainlang));
1069                 if (runparams.use_polyglossia
1070                     && !bparams.language->polyglossiaOpts().empty())
1071                         os << "["
1072                             << from_ascii(bparams.language->polyglossiaOpts())
1073                             << "]";
1074                 os << '\n';
1075         }
1076
1077         ParagraphList const & paragraphs = text.paragraphs();
1078         LASSERT(runparams.par_begin <= runparams.par_end, /**/);
1079
1080         if (runparams.par_begin == runparams.par_end) {
1081                 // The full doc will be exported but it is easier to just rely on
1082                 // runparams range parameters that will be passed TeXEnvironment.
1083                 runparams.par_begin = 0;
1084                 runparams.par_end = paragraphs.size();
1085         }
1086
1087         pit_type pit = runparams.par_begin;
1088         // lastpit is for the language check after the loop.
1089         pit_type lastpit = pit;
1090         // variables used in the loop:
1091         bool was_title = false;
1092         bool already_title = false;
1093         DocumentClass const & tclass = bparams.documentClass();
1094
1095         for (; pit < runparams.par_end; ++pit) {
1096                 lastpit = pit;
1097                 ParagraphList::const_iterator par = paragraphs.constIterator(pit);
1098
1099                 // FIXME This check should not be needed. We should
1100                 // perhaps issue an error if it is.
1101                 Layout const & layout = text.inset().forcePlainLayout() ?
1102                                 tclass.plainLayout() : par->layout();
1103
1104                 if (layout.intitle) {
1105                         if (already_title) {
1106                                 LYXERR0("Error in latexParagraphs: You"
1107                                         " should not mix title layouts"
1108                                         " with normal ones.");
1109                         } else if (!was_title) {
1110                                 was_title = true;
1111                                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1112                                         os << "\\begin{"
1113                                                         << from_ascii(tclass.titlename())
1114                                                         << "}\n";
1115                                 }
1116                         }
1117                 } else if (was_title && !already_title) {
1118                         if (tclass.titletype() == TITLE_ENVIRONMENT) {
1119                                 os << "\\end{" << from_ascii(tclass.titlename())
1120                                                 << "}\n";
1121                         }
1122                         else {
1123                                 os << "\\" << from_ascii(tclass.titlename())
1124                                                 << "\n";
1125                         }
1126                         already_title = true;
1127                         was_title = false;
1128                 }
1129
1130
1131                 if (!layout.isEnvironment() && par->params().leftIndent().zero()) {
1132                         // This is a standard top level paragraph, TeX it and continue.
1133                         TeXOnePar(buf, text, pit, os, runparams, everypar);
1134                         continue;
1135                 }
1136
1137                 TeXEnvironmentData const data =
1138                         prepareEnvironment(buf, text, par, os, runparams);
1139                 // pit can be changed in TeXEnvironment.
1140                 TeXEnvironment(buf, text, runparams, pit, os);
1141                 finishEnvironment(os, runparams, data);
1142         }
1143
1144         if (pit == runparams.par_end) {
1145                         // Make sure that the last paragraph is
1146                         // correctly terminated (because TeXOnePar does
1147                         // not add a \n in this case)
1148                         //os << '\n';
1149         }
1150
1151         // It might be that we only have a title in this document
1152         if (was_title && !already_title) {
1153                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1154                         os << "\\end{" << from_ascii(tclass.titlename())
1155                            << "}\n";
1156                 } else {
1157                         os << "\\" << from_ascii(tclass.titlename())
1158                            << "\n";
1159                 }
1160         }
1161
1162         // if "auto end" is switched off, explicitly close the language at the end
1163         // but only if the last par is in a babel language
1164         string const lang_end_command = runparams.use_polyglossia ?
1165                 "\\end{$$lang}" : lyxrc.language_command_end;
1166         if (maintext && !lyxrc.language_auto_end && !mainlang.empty() &&
1167                 paragraphs.at(lastpit).getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
1168                 os << from_utf8(subst(lang_end_command,
1169                                         "$$lang",
1170                                         mainlang))
1171                         << '\n';
1172         }
1173
1174         // If the last paragraph is an environment, we'll have to close
1175         // CJK at the very end to do proper nesting.
1176         if (maintext && !is_child && open_encoding_ == CJK) {
1177                 os << "\\end{CJK}\n";
1178                 open_encoding_ = none;
1179         }
1180
1181         // reset inherited encoding
1182         if (cjk_inherited_ > 0) {
1183                 cjk_inherited_ -= 1;
1184                 if (cjk_inherited_ == 0)
1185                         open_encoding_ = CJK;
1186         }
1187 }
1188
1189
1190 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
1191                    OutputParams const & runparams, Encoding const & newEnc,
1192                    bool force)
1193 {
1194         Encoding const & oldEnc = *runparams.encoding;
1195         bool moving_arg = runparams.moving_arg;
1196         if (!force && ((bparams.inputenc != "auto" && bparams.inputenc != "default")
1197                 || moving_arg))
1198                 return make_pair(false, 0);
1199
1200         // Do nothing if the encoding is unchanged.
1201         if (oldEnc.name() == newEnc.name())
1202                 return make_pair(false, 0);
1203
1204         // FIXME We ignore encoding switches from/to encodings that do
1205         // neither support the inputenc package nor the CJK package here.
1206         // This does of course only work in special cases (e.g. switch from
1207         // tis620-0 to latin1, but the text in latin1 contains ASCII only),
1208         // but it is the best we can do
1209         if (oldEnc.package() == Encoding::none
1210                 || newEnc.package() == Encoding::none)
1211                 return make_pair(false, 0);
1212
1213         LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
1214                 << oldEnc.name() << " to " << newEnc.name());
1215         os << setEncoding(newEnc.iconvName());
1216         if (bparams.inputenc == "default")
1217                 return make_pair(true, 0);
1218
1219         docstring const inputenc_arg(from_ascii(newEnc.latexName()));
1220         switch (newEnc.package()) {
1221                 case Encoding::none:
1222                 case Encoding::japanese:
1223                         // shouldn't ever reach here, see above
1224                         return make_pair(true, 0);
1225                 case Encoding::inputenc: {
1226                         int count = inputenc_arg.length();
1227                         if (oldEnc.package() == Encoding::CJK &&
1228                             open_encoding_ == CJK) {
1229                                 os << "\\end{CJK}";
1230                                 open_encoding_ = none;
1231                                 count += 9;
1232                         }
1233                         else if (oldEnc.package() == Encoding::inputenc &&
1234                                  open_encoding_ == inputenc) {
1235                                 os << "\\egroup";
1236                                 open_encoding_ = none;
1237                                 count += 7;
1238                         }
1239                         if (runparams.local_font != 0
1240                             &&  oldEnc.package() == Encoding::CJK) {
1241                                 // within insets, \inputenc switches need
1242                                 // to be embraced within \bgroup...\egroup;
1243                                 // else CJK fails.
1244                                 os << "\\bgroup";
1245                                 count += 7;
1246                                 open_encoding_ = inputenc;
1247                         }
1248                         // with the japanese option, inputenc is omitted.
1249                         if (runparams.use_japanese)
1250                                 return make_pair(true, count);
1251                         os << "\\inputencoding{" << inputenc_arg << '}';
1252                         return make_pair(true, count + 16);
1253                 }
1254                 case Encoding::CJK: {
1255                         int count = inputenc_arg.length();
1256                         if (oldEnc.package() == Encoding::CJK &&
1257                             open_encoding_ == CJK) {
1258                                 os << "\\end{CJK}";
1259                                 count += 9;
1260                         }
1261                         if (oldEnc.package() == Encoding::inputenc &&
1262                             open_encoding_ == inputenc) {
1263                                 os << "\\egroup";
1264                                 count += 7;
1265                         }
1266                         os << "\\begin{CJK}{" << inputenc_arg << "}{"
1267                            << from_ascii(bparams.fonts_cjk) << "}";
1268                         open_encoding_ = CJK;
1269                         return make_pair(true, count + 15);
1270                 }
1271         }
1272         // Dead code to avoid a warning:
1273         return make_pair(true, 0);
1274
1275 }
1276
1277 } // namespace lyx