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, bool item)
 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 = item ? "item:" + convert<string>(i) : 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, bool item)
 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 = item ? split(ins->name(), ':') : 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, item);
 419 }
 420
 421
 422 void latexArgInsets(ParagraphList const & pars, ParagraphList::const_iterator pit,
 423         otexstream & os, OutputParams const & runparams, Layout::LaTeXArgMap const & latexargs)
 424 {
 425         map<int, InsetArgument const *> ilist;
 426         vector<string> required;
 427
 428         depth_type const current_depth = pit->params().depth();
 429         Layout const current_layout = pit->layout();
 430
 431         // get the first paragraph in sequence with this layout and depth
 432         pit_type offset = 0;
 433         while (true) {
 434                 if (boost::prior(pit, offset) == pars.begin())
 435                         break;
 436                 ParagraphList::const_iterator priorpit = boost::prior(pit, offset + 1);
 437                 if (priorpit->layout() == current_layout
 438                     && priorpit->params().depth() == current_depth)
 439                         ++offset;
 440                 else
 441                         break;
 442         }
 443
 444         ParagraphList::const_iterator spit = boost::prior(pit, offset);
 445
 446         for (; spit != pars.end(); ++spit) {
 447                 if (spit->layout() != current_layout)
 448                         break;
 449                 InsetList::const_iterator it = spit->insetList().begin();
 450                 InsetList::const_iterator end = spit->insetList().end();
 451                 for (; it != end; ++it) {
 452                         if (it->inset->lyxCode() == ARG_CODE) {
 453                                 InsetArgument const * ins =
 454                                         static_cast<InsetArgument const *>(it->inset);
 455                                 if (ins->name().empty())
 456                                         LYXERR0("Error: Unnamed argument inset!");
 457                                 else {
 458                                         string const name = ins->name();
 459                                         unsigned int const nr = convert<unsigned int>(name);
 460                                         if (ilist.find(nr) == ilist.end())
 461                                                 ilist[nr] = ins;
 462                                         Layout::LaTeXArgMap::const_iterator const lit =
 463                                                         latexargs.find(ins->name());
 464                                         if (lit != latexargs.end()) {
 465                                                 Layout::latexarg const & arg = (*lit).second;
 466                                                 if (!arg.requires.empty()) {
 467                                                         vector<string> req = getVectorFromString(arg.requires);
 468                                                         required.insert(required.end(), req.begin(), req.end());
 469                                                 }
 470                                         }
 471                                 }
 472                         }
 473                 }
 474         }
 475         getArgInsets(os, runparams, latexargs, ilist, required, false);
 476 }
 477
 478 namespace {
 479
 480 // output the proper paragraph start according to latextype.
 481 void parStartCommand(Paragraph const & par, otexstream & os,
 482                      OutputParams const & runparams, Layout const & style)
 483 {
 484         switch (style.latextype) {
 485         case LATEX_COMMAND:
 486                 os << '\\' << from_ascii(style.latexname());
 487
 488                 // Command arguments
 489                 if (!style.latexargs().empty())
 490                         latexArgInsets(par, os, runparams, style.latexargs());
 491                 os << from_ascii(style.latexparam());
 492                 break;
 493         case LATEX_ITEM_ENVIRONMENT:
 494         case LATEX_LIST_ENVIRONMENT:
 495                 os << "\\" + style.itemcommand();
 496                 // Item arguments
 497                 if (!style.itemargs().empty())
 498                         latexArgInsets(par, os, runparams, style.itemargs(), true);
 499                 os << " ";
 500                 break;
 501         case LATEX_BIB_ENVIRONMENT:
 502                 // ignore this, the inset will write itself
 503                 break;
 504         default:
 505                 break;
 506         }
 507 }
 508
 509 } // namespace anon
 510
 511 // FIXME: this should be anonymous
 512 void TeXOnePar(Buffer const & buf,
 513                Text const & text,
 514                pit_type pit,
 515                otexstream & os,
 516                OutputParams const & runparams_in,
 517                string const & everypar,
 518                int start_pos, int end_pos)
 519 {
 520         BufferParams const & bparams = buf.params();
 521         ParagraphList const & paragraphs = text.paragraphs();
 522         Paragraph const & par = paragraphs.at(pit);
 523         // FIXME This check should not really be needed.
 524         // Perhaps we should issue an error if it is.
 525         Layout const style = text.inset().forcePlainLayout() ?
 526                 bparams.documentClass().plainLayout() : par.layout();
 527
 528         if (style.inpreamble)
 529                 return;
 530
 531         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " ptr " << &par << " '"
 532                 << everypar << "'");
 533
 534         OutputParams runparams = runparams_in;
 535         runparams.isLastPar = (pit == pit_type(paragraphs.size() - 1));
 536         // We reinitialze par begin and end to be on the safe side
 537         // with embedded inset as we don't know if they set those
 538         // value correctly.
 539         runparams.par_begin = 0;
 540         runparams.par_end = 0;
 541
 542         bool const maintext = text.isMainText();
 543         // we are at the beginning of an inset and CJK is already open;
 544         // we count inheritation levels to get the inset nesting right.
 545         if (pit == 0 && !maintext
 546             && (cjk_inherited_ > 0 || open_encoding_ == CJK)) {
 547                 cjk_inherited_ += 1;
 548                 open_encoding_ = none;
 549         }
 550
 551         if (text.inset().isPassThru()) {
 552                 Font const outerfont = text.outerFont(pit);
 553
 554                 // No newline before first paragraph in this lyxtext
 555                 if (pit > 0) {
 556                         os << '\n';
 557                         if (!text.inset().getLayout().parbreakIsNewline())
 558                                 os << '\n';
 559                 }
 560
 561                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 562                 return;
 563         }
 564
 565         Paragraph const * nextpar = runparams.isLastPar
 566                 ? 0 : &paragraphs.at(pit + 1);
 567
 568         if (style.pass_thru) {
 569                 Font const outerfont = text.outerFont(pit);
 570                 runparams.local_font = &par.getFirstFontSettings(bparams);
 571                 parStartCommand(par, os, runparams, style);
 572
 573                 par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 574
 575                 // I did not create a parEndCommand for this minuscule
 576                 // task because in the other user of parStartCommand
 577                 // the code is different (JMarc)
 578                 if (style.isCommand())
 579                         os << "}\n";
 580                 else
 581                         os << '\n';
 582                 if (!style.parbreak_is_newline) {
 583                         os << '\n';
 584                 } else if (nextpar) {
 585                         Layout const nextstyle = text.inset().forcePlainLayout()
 586                                 ? bparams.documentClass().plainLayout()
 587                                 : nextpar->layout();
 588                         if (nextstyle.name() != style.name())
 589                                 os << '\n';
 590                 }
 591
 592                 return;
 593         }
 594
 595         // This paragraph's language
 596         Language const * const par_language = par.getParLanguage(bparams);
 597         // The document's language
 598         Language const * const doc_language = bparams.language;
 599         // The language that was in effect when the environment this paragraph is
 600         // inside of was opened
 601         Language const * const outer_language =
 602                 (runparams.local_font != 0) ?
 603                         runparams.local_font->language() : doc_language;
 604
 605         Paragraph const * priorpar = (pit == 0) ? 0 : &paragraphs.at(pit - 1);
 606
 607         // The previous language that was in effect is the language of the
 608         // previous paragraph, unless the previous paragraph is inside an
 609         // environment with nesting depth greater than (or equal to, but with
 610         // a different layout) the current one. If there is no previous
 611         // paragraph, the previous language is the outer language.
 612         bool const use_prev_env_language = prev_env_language_ != 0
 613                         && priorpar
 614                         && priorpar->layout().isEnvironment()
 615                         && (priorpar->getDepth() > par.getDepth()
 616                             || (priorpar->getDepth() == par.getDepth()
 617                                     && priorpar->layout() != par.layout()));
 618         Language const * const prev_language =
 619                 (pit != 0)
 620                 ? (use_prev_env_language ? prev_env_language_
 621                                          : priorpar->getParLanguage(bparams))
 622                 : outer_language;
 623
 624
 625         bool const use_polyglossia = runparams.use_polyglossia;
 626         string const par_lang = use_polyglossia ?
 627                 getPolyglossiaEnvName(par_language): par_language->babel();
 628         string const prev_lang = use_polyglossia ?
 629                 getPolyglossiaEnvName(prev_language) : prev_language->babel();
 630         string const doc_lang = use_polyglossia ?
 631                 getPolyglossiaEnvName(doc_language) : doc_language->babel();
 632         string const outer_lang = use_polyglossia ?
 633                 getPolyglossiaEnvName(outer_language) : outer_language->babel();
 634         string lang_begin_command = use_polyglossia ?
 635                 "\\begin{$$lang}" : lyxrc.language_command_begin;
 636         string lang_end_command = use_polyglossia ?
 637                 "\\end{$$lang}" : lyxrc.language_command_end;
 638         // the '%' is necessary to prevent unwanted whitespace
 639         string lang_command_termination = "%\n";
 640
 641         // In some insets (such as Arguments), we cannot use \selectlanguage
 642         bool const localswitch = !use_polyglossia
 643                 && text.inset().getLayout().forcelocalfontswitch();
 644         if (localswitch) {
 645                 lang_begin_command = lyxrc.language_command_local;
 646                 lang_end_command = "}";
 647                 lang_command_termination.clear();
 648         }
 649
 650         if (par_lang != prev_lang
 651                 // check if we already put language command in TeXEnvironment()
 652                 && !(style.isEnvironment()
 653                      && (pit == 0 || (priorpar->layout() != par.layout()
 654                                           && priorpar->getDepth() <= par.getDepth())
 655                                   || priorpar->getDepth() < par.getDepth())))
 656         {
 657                 if (!lang_end_command.empty() &&
 658                     prev_lang != outer_lang &&
 659                     !prev_lang.empty())
 660                 {
 661                         os << from_ascii(subst(lang_end_command,
 662                                 "$$lang",
 663                                 prev_lang))
 664                            << lang_command_termination;
 665                 }
 666
 667                 // We need to open a new language if we couldn't close the previous
 668                 // one (because there's no language_command_end); and even if we closed
 669                 // the previous one, if the current language is different than the
 670                 // outer_language (which is currently in effect once the previous one
 671                 // is closed).
 672                 if ((lang_end_command.empty() || par_lang != outer_lang)
 673                         && !par_lang.empty()) {
 674                         // If we're inside an inset, and that inset is within an \L or \R
 675                         // (or equivalents), then within the inset, too, any opposite
 676                         // language paragraph should appear within an \L or \R (in addition
 677                         // to, outside of, the normal language switch commands).
 678                         // This behavior is not correct for ArabTeX, though.
 679                         if (!use_polyglossia
 680                             // not for ArabTeX
 681                                 && par_language->lang() != "arabic_arabtex"
 682                                 && outer_language->lang() != "arabic_arabtex"
 683                             // are we in an inset?
 684                             && runparams.local_font != 0
 685                             // is the inset within an \L or \R?
 686                             //
 687                             // FIXME: currently, we don't check this; this means that
 688                             // we'll have unnnecessary \L and \R commands, but that
 689                             // doesn't seem to hurt (though latex will complain)
 690                             //
 691                             // is this paragraph in the opposite direction?
 692                             && runparams.local_font->isRightToLeft() != par_language->rightToLeft()) {
 693                                 // FIXME: I don't have a working copy of the Arabi package, so
 694                                 // I'm not sure if the farsi and arabic_arabi stuff is correct
 695                                 // or not...
 696                                 if (par_language->lang() == "farsi")
 697                                         os << "\\textFR{";
 698                                 else if (outer_language->lang() == "farsi")
 699                                         os << "\\textLR{";
 700                                 else if (par_language->lang() == "arabic_arabi")
 701                                         os << "\\textAR{";
 702                                 else if (outer_language->lang() == "arabic_arabi")
 703                                         os << "\\textLR{";
 704                                 // remaining RTL languages currently is hebrew
 705                                 else if (par_language->rightToLeft())
 706                                         os << "\\R{";
 707                                 else
 708                                         os << "\\L{";
 709                         }
 710                         // With CJK, the CJK tag has to be closed first (see below)
 711                         if (runparams.encoding->package() != Encoding::CJK
 712                             && !par_lang.empty()) {
 713                                 os << from_ascii(subst(
 714                                         lang_begin_command,
 715                                         "$$lang",
 716                                         par_lang));
 717                                 if (use_polyglossia
 718                                     && !par_language->polyglossiaOpts().empty())
 719                                                 os << "["
 720                                                   << from_ascii(par_language->polyglossiaOpts())
 721                                                   << "]";
 722                                 os << lang_command_termination;
 723                         }
 724                 }
 725         }
 726
 727         // Switch file encoding if necessary; no need to do this for "default"
 728         // encoding, since this only affects the position of the outputted
 729         // \inputencoding command; the encoding switch will occur when necessary
 730         if (bparams.inputenc == "auto"
 731                 && runparams.encoding->package() != Encoding::none) {
 732                 // Look ahead for future encoding changes.
 733                 // We try to output them at the beginning of the paragraph,
 734                 // since the \inputencoding command is not allowed e.g. in
 735                 // sections. For this reason we only set runparams.moving_arg
 736                 // after checking for the encoding change, otherwise the
 737                 // change would be always avoided by switchEncoding().
 738                 for (pos_type i = 0; i < par.size(); ++i) {
 739                         char_type const c = par.getChar(i);
 740                         Encoding const * const encoding =
 741                                 par.getFontSettings(bparams, i).language()->encoding();
 742                         if (encoding->package() != Encoding::CJK
 743                                 && runparams.encoding->package() == Encoding::inputenc
 744                                 && c < 0x80)
 745                                 continue;
 746                         if (par.isInset(i))
 747                                 break;
 748                         // All characters before c are in the ASCII range, and
 749                         // c is non-ASCII (but no inset), so change the
 750                         // encoding to that required by the language of c.
 751                         // With CJK, only add switch if we have CJK content at the beginning
 752                         // of the paragraph
 753                         if (i != 0 && encoding->package() == Encoding::CJK)
 754                                 continue;
 755
 756                         pair<bool, int> enc_switch = switchEncoding(os.os(),
 757                                                 bparams, runparams, *encoding);
 758                         // the following is necessary after a CJK environment in a multilingual
 759                         // context (nesting issue).
 760                         if (par_language->encoding()->package() == Encoding::CJK
 761                                 && open_encoding_ != CJK && cjk_inherited_ == 0) {
 762                                 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 763                                    << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
 764                                 open_encoding_ = CJK;
 765                         }
 766                         if (encoding->package() != Encoding::none && enc_switch.first) {
 767                                 if (enc_switch.second > 0) {
 768                                         // the '%' is necessary to prevent unwanted whitespace
 769                                         os << "%\n";
 770                                 }
 771                                 // With CJK, the CJK tag had to be closed first (see above)
 772                                 if (runparams.encoding->package() == Encoding::CJK
 773                                     && !par_lang.empty()) {
 774                                         os << from_ascii(subst(
 775                                                 lang_begin_command,
 776                                                 "$$lang",
 777                                                 par_lang))
 778                                         << lang_command_termination;
 779                                 }
 780                                 runparams.encoding = encoding;
 781                         }
 782                         break;
 783                 }
 784         }
 785
 786         runparams.moving_arg |= style.needprotect;
 787         Encoding const * const prev_encoding = runparams.encoding;
 788
 789         bool const useSetSpace = bparams.documentClass().provides("SetSpace");
 790         if (par.allowParagraphCustomization()) {
 791                 if (par.params().startOfAppendix()) {
 792                         os << "\\appendix\n";
 793                 }
 794
 795                 if (!par.params().spacing().isDefault()
 796                         && (pit == 0 || !priorpar->hasSameLayout(par)))
 797                 {
 798                         os << from_ascii(par.params().spacing().writeEnvirBegin(useSetSpace))
 799                             << '\n';
 800                 }
 801
 802                 if (style.isCommand()) {
 803                         os << '\n';
 804                 }
 805         }
 806
 807         runparams.local_font = &par.getFirstFontSettings(bparams);
 808         parStartCommand(par, os, runparams, style);
 809         Font const outerfont = text.outerFont(pit);
 810
 811         // FIXME UNICODE
 812         os << from_utf8(everypar);
 813         par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
 814
 815         // Make sure that \\par is done with the font of the last
 816         // character if this has another size as the default.
 817         // This is necessary because LaTeX (and LyX on the screen)
 818         // calculates the space between the baselines according
 819         // to this font. (Matthias)
 820         //
 821         // Is this really needed ? (Dekel)
 822         // We do not need to use to change the font for the last paragraph
 823         // or for a command.
 824
 825         Font const font = par.empty()
 826                  ? par.getLayoutFont(bparams, outerfont)
 827                  : par.getFont(bparams, par.size() - 1, outerfont);
 828
 829         bool const is_command = style.isCommand();
 830
 831         if (style.resfont.size() != font.fontInfo().size()
 832             && nextpar
 833             && !is_command) {
 834                 os << '{';
 835                 os << "\\" << from_ascii(font.latexSize()) << " \\par}";
 836         } else if (is_command) {
 837                 os << '}';
 838                 if (runparams.encoding != prev_encoding) {
 839                         runparams.encoding = prev_encoding;
 840                         if (!runparams.isFullUnicode())
 841                                 os << setEncoding(prev_encoding->iconvName());
 842                 }
 843         }
 844
 845         bool pending_newline = false;
 846         bool unskip_newline = false;
 847         switch (style.latextype) {
 848         case LATEX_ITEM_ENVIRONMENT:
 849         case LATEX_LIST_ENVIRONMENT:
 850                 if (nextpar && (par.params().depth() < nextpar->params().depth()))
 851                         pending_newline = true;
 852                 break;
 853         case LATEX_ENVIRONMENT: {
 854                 // if its the last paragraph of the current environment
 855                 // skip it otherwise fall through
 856                 if (nextpar
 857                         && (nextpar->layout() != par.layout()
 858                         || nextpar->params().depth() != par.params().depth()))
 859                         break;
 860         }
 861
 862         // fall through possible
 863         default:
 864                 // we don't need it for the last paragraph!!!
 865                 if (nextpar)
 866                         pending_newline = true;
 867         }
 868
 869         if (par.allowParagraphCustomization()) {
 870                 if (!par.params().spacing().isDefault()
 871                         && (runparams.isLastPar || !nextpar->hasSameLayout(par))) {
 872                         if (pending_newline)
 873                                 os << '\n';
 874                         os << from_ascii(par.params().spacing().writeEnvirEnd(useSetSpace));
 875                         pending_newline = true;
 876                 }
 877         }
 878
 879         // Closing the language is needed for the last paragraph; it is also
 880         // needed if we're within an \L or \R that we may have opened above (not
 881         // necessarily in this paragraph) and are about to close.
 882         bool closing_rtl_ltr_environment = !use_polyglossia
 883                 // not for ArabTeX
 884                 && (par_language->lang() != "arabic_arabtex"
 885                     && outer_language->lang() != "arabic_arabtex")
 886                      // have we opened and \L or \R environment?
 887                 && runparams.local_font != 0
 888                 && runparams.local_font->isRightToLeft() != par_language->rightToLeft()
 889                 // are we about to close the language?
 890                 &&((nextpar && par_language->babel() != (nextpar->getParLanguage(bparams))->babel())
 891                    || (runparams.isLastPar && par_language->babel() != outer_language->babel()));
 892
 893         if (closing_rtl_ltr_environment
 894             || (runparams.isLastPar
 895                 && ((!use_polyglossia && par_language->babel() != outer_language->babel())
 896                     || (use_polyglossia && par_language->polyglossia() != outer_language->polyglossia())))) {
 897                 // Since \selectlanguage write the language to the aux file,
 898                 // we need to reset the language at the end of footnote or
 899                 // float.
 900
 901                 if (pending_newline)
 902                         os << '\n';
 903
 904                 // when the paragraph uses CJK, the language has to be closed earlier
 905                 if (font.language()->encoding()->package() != Encoding::CJK) {
 906                         if (lang_end_command.empty()) {
 907                                 // If this is a child, we should restore the
 908                                 // master language after the last paragraph.
 909                                 Language const * const current_language =
 910                                         (runparams.isLastPar && runparams.master_language)
 911                                                 ? runparams.master_language
 912                                                 : outer_language;
 913                                 string const current_lang = use_polyglossia
 914                                         ? getPolyglossiaEnvName(current_language)
 915                                         : current_language->babel();
 916                                 if (!current_lang.empty()) {
 917                                         os << from_ascii(subst(
 918                                                 lang_begin_command,
 919                                                 "$$lang",
 920                                                 current_lang));
 921                                         pending_newline = !localswitch;
 922                                         unskip_newline = !localswitch;
 923                                 }
 924                         } else if (!par_lang.empty()) {
 925                                 os << from_ascii(subst(
 926                                         lang_end_command,
 927                                         "$$lang",
 928                                         par_lang));
 929                                 pending_newline = !localswitch;
 930                                 unskip_newline = !localswitch;
 931                         }
 932                 }
 933         }
 934         if (closing_rtl_ltr_environment)
 935                 os << "}";
 936
 937         if (pending_newline) {
 938                 if (unskip_newline)
 939                         // prevent unwanted whitespace
 940                         os << '%';
 941                 os << '\n';
 942         }
 943
 944         // if this is a CJK-paragraph and the next isn't, close CJK
 945         // also if the next paragraph is a multilingual environment (because of nesting)
 946         if (nextpar
 947                 && open_encoding_ == CJK
 948                 && (nextpar->getParLanguage(bparams)->encoding()->package() != Encoding::CJK
 949                    || (nextpar->layout().isEnvironment() && nextpar->isMultiLingual(bparams)))
 950                 // inbetween environments, CJK has to be closed later (nesting!)
 951                 && (!style.isEnvironment() || !nextpar->layout().isEnvironment())) {
 952                 os << "\\end{CJK}\n";
 953                 open_encoding_ = none;
 954         }
 955
 956         // If this is the last paragraph, close the CJK environment
 957         // if necessary. If it's an environment, we'll have to \end that first.
 958         if (runparams.isLastPar && !style.isEnvironment()) {
 959                 switch (open_encoding_) {
 960                         case CJK: {
 961                                 // do nothing at the end of child documents
 962                                 if (maintext && buf.masterBuffer() != &buf)
 963                                         break;
 964                                 // end of main text
 965                                 if (maintext) {
 966                                         os << "\n\\end{CJK}\n";
 967                                 // end of an inset
 968                                 } else
 969                                         os << "\\end{CJK}";
 970                                 open_encoding_ = none;
 971                                 break;
 972                         }
 973                         case inputenc: {
 974                                 os << "\\egroup";
 975                                 open_encoding_ = none;
 976                                 break;
 977                         }
 978                         case none:
 979                         default:
 980                                 // do nothing
 981                                 break;
 982                 }
 983         }
 984
 985         // If this is the last paragraph, and a local_font was set upon entering
 986         // the inset, and we're using "auto" or "default" encoding, the encoding
 987         // should be set back to that local_font's encoding.
 988         // However, do not change the encoding when a fully unicode aware backend
 989         // such as XeTeX is used.
 990         if (runparams.isLastPar && runparams_in.local_font != 0
 991             && runparams_in.encoding != runparams_in.local_font->language()->encoding()
 992             && (bparams.inputenc == "auto" || bparams.inputenc == "default")
 993             && (!runparams.isFullUnicode())) {
 994                 runparams_in.encoding = runparams_in.local_font->language()->encoding();
 995                 os << setEncoding(runparams_in.encoding->iconvName());
 996         }
 997         // Otherwise, the current encoding should be set for the next paragraph.
 998         else
 999                 runparams_in.encoding = runparams.encoding;
1000
1001
1002         // we don't need a newline for the last paragraph!!!
1003         // Note from JMarc: we will re-add a \n explicitly in
1004         // TeXEnvironment, because it is needed in this case
1005         if (nextpar) {
1006                 Layout const & next_layout = nextpar->layout();
1007                 if (style == next_layout
1008                     // no blank lines before environments!
1009                     || !next_layout.isEnvironment()
1010                     // unless there's a depth change
1011                     // FIXME What we really want to do here is put every \begin and \end
1012                     // tag on a new line (which was not the case with nested environments).
1013                     // But in the present state of play, we don't have access to the
1014                     // information whether the current TeX row is empty or not.
1015                     // For some ideas about how to fix this, see this thread:
1016                     // http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg145787.html
1017                     || nextpar->params().depth() != par.params().depth()) {
1018                         os << '\n';
1019                 }
1020         }
1021
1022         LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " done; ptr "
1023                 << &par << " next " << nextpar);
1024
1025         return;
1026 }
1027
1028
1029 // LaTeX all paragraphs
1030 void latexParagraphs(Buffer const & buf,
1031                      Text const & text,
1032                      otexstream & os,
1033                      OutputParams const & runparams,
1034                      string const & everypar)
1035 {
1036         BufferParams const & bparams = buf.params();
1037
1038         bool const maintext = text.isMainText();
1039         bool const is_child = buf.masterBuffer() != &buf;
1040
1041         // Open a CJK environment at the beginning of the main buffer
1042         // if the document's language is a CJK language
1043         // (but not in child documents)
1044         if (maintext && !is_child
1045             && bparams.encoding().package() == Encoding::CJK) {
1046                 os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
1047                 << "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
1048                 open_encoding_ = CJK;
1049         }
1050         // if "auto begin" is switched off, explicitly switch the
1051         // language on at start
1052         string const mainlang = runparams.use_polyglossia
1053                 ? getPolyglossiaEnvName(bparams.language)
1054                 : bparams.language->babel();
1055         string const lang_begin_command = runparams.use_polyglossia ?
1056                 "\\begin{$$lang}" : lyxrc.language_command_begin;
1057
1058         if (maintext && !lyxrc.language_auto_begin &&
1059             !mainlang.empty()) {
1060                 // FIXME UNICODE
1061                 os << from_utf8(subst(lang_begin_command,
1062                                         "$$lang",
1063                                         mainlang));
1064                 if (runparams.use_polyglossia
1065                     && !bparams.language->polyglossiaOpts().empty())
1066                         os << "["
1067                             << from_ascii(bparams.language->polyglossiaOpts())
1068                             << "]";
1069                 os << '\n';
1070         }
1071
1072         ParagraphList const & paragraphs = text.paragraphs();
1073         LASSERT(runparams.par_begin <= runparams.par_end, /**/);
1074
1075         if (runparams.par_begin == runparams.par_end) {
1076                 // The full doc will be exported but it is easier to just rely on
1077                 // runparams range parameters that will be passed TeXEnvironment.
1078                 runparams.par_begin = 0;
1079                 runparams.par_end = paragraphs.size();
1080         }
1081
1082         pit_type pit = runparams.par_begin;
1083         // lastpit is for the language check after the loop.
1084         pit_type lastpit = pit;
1085         // variables used in the loop:
1086         bool was_title = false;
1087         bool already_title = false;
1088         DocumentClass const & tclass = bparams.documentClass();
1089
1090         for (; pit < runparams.par_end; ++pit) {
1091                 lastpit = pit;
1092                 ParagraphList::const_iterator par = paragraphs.constIterator(pit);
1093
1094                 // FIXME This check should not be needed. We should
1095                 // perhaps issue an error if it is.
1096                 Layout const & layout = text.inset().forcePlainLayout() ?
1097                                 tclass.plainLayout() : par->layout();
1098
1099                 if (layout.intitle) {
1100                         if (already_title) {
1101                                 LYXERR0("Error in latexParagraphs: You"
1102                                         " should not mix title layouts"
1103                                         " with normal ones.");
1104                         } else if (!was_title) {
1105                                 was_title = true;
1106                                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1107                                         os << "\\begin{"
1108                                                         << from_ascii(tclass.titlename())
1109                                                         << "}\n";
1110                                 }
1111                         }
1112                 } else if (was_title && !already_title) {
1113                         if (tclass.titletype() == TITLE_ENVIRONMENT) {
1114                                 os << "\\end{" << from_ascii(tclass.titlename())
1115                                                 << "}\n";
1116                         }
1117                         else {
1118                                 os << "\\" << from_ascii(tclass.titlename())
1119                                                 << "\n";
1120                         }
1121                         already_title = true;
1122                         was_title = false;
1123                 }
1124
1125
1126                 if (!layout.isEnvironment() && par->params().leftIndent().zero()) {
1127                         // This is a standard top level paragraph, TeX it and continue.
1128                         TeXOnePar(buf, text, pit, os, runparams, everypar);
1129                         continue;
1130                 }
1131
1132                 TeXEnvironmentData const data =
1133                         prepareEnvironment(buf, text, par, os, runparams);
1134                 // pit can be changed in TeXEnvironment.
1135                 TeXEnvironment(buf, text, runparams, pit, os);
1136                 finishEnvironment(os, runparams, data);
1137         }
1138
1139         if (pit == runparams.par_end) {
1140                         // Make sure that the last paragraph is
1141                         // correctly terminated (because TeXOnePar does
1142                         // not add a \n in this case)
1143                         //os << '\n';
1144         }
1145
1146         // It might be that we only have a title in this document
1147         if (was_title && !already_title) {
1148                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
1149                         os << "\\end{" << from_ascii(tclass.titlename())
1150                            << "}\n";
1151                 } else {
1152                         os << "\\" << from_ascii(tclass.titlename())
1153                            << "\n";
1154                 }
1155         }
1156
1157         // if "auto end" is switched off, explicitly close the language at the end
1158         // but only if the last par is in a babel language
1159         string const lang_end_command = runparams.use_polyglossia ?
1160                 "\\end{$$lang}" : lyxrc.language_command_end;
1161         if (maintext && !lyxrc.language_auto_end && !mainlang.empty() &&
1162                 paragraphs.at(lastpit).getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
1163                 os << from_utf8(subst(lang_end_command,
1164                                         "$$lang",
1165                                         mainlang))
1166                         << '\n';
1167         }
1168
1169         // If the last paragraph is an environment, we'll have to close
1170         // CJK at the very end to do proper nesting.
1171         if (maintext && !is_child && open_encoding_ == CJK) {
1172                 os << "\\end{CJK}\n";
1173                 open_encoding_ = none;
1174         }
1175
1176         // reset inherited encoding
1177         if (cjk_inherited_ > 0) {
1178                 cjk_inherited_ -= 1;
1179                 if (cjk_inherited_ == 0)
1180                         open_encoding_ = CJK;
1181         }
1182 }
1183
1184
1185 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
1186                    OutputParams const & runparams, Encoding const & newEnc,
1187                    bool force)
1188 {
1189         Encoding const & oldEnc = *runparams.encoding;
1190         bool moving_arg = runparams.moving_arg;
1191         if (!force && ((bparams.inputenc != "auto" && bparams.inputenc != "default")
1192                 || moving_arg))
1193                 return make_pair(false, 0);
1194
1195         // Do nothing if the encoding is unchanged.
1196         if (oldEnc.name() == newEnc.name())
1197                 return make_pair(false, 0);
1198
1199         // FIXME We ignore encoding switches from/to encodings that do
1200         // neither support the inputenc package nor the CJK package here.
1201         // This does of course only work in special cases (e.g. switch from
1202         // tis620-0 to latin1, but the text in latin1 contains ASCII only),
1203         // but it is the best we can do
1204         if (oldEnc.package() == Encoding::none
1205                 || newEnc.package() == Encoding::none)
1206                 return make_pair(false, 0);
1207
1208         LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
1209                 << oldEnc.name() << " to " << newEnc.name());
1210         os << setEncoding(newEnc.iconvName());
1211         if (bparams.inputenc == "default")
1212                 return make_pair(true, 0);
1213
1214         docstring const inputenc_arg(from_ascii(newEnc.latexName()));
1215         switch (newEnc.package()) {
1216                 case Encoding::none:
1217                 case Encoding::japanese:
1218                         // shouldn't ever reach here, see above
1219                         return make_pair(true, 0);
1220                 case Encoding::inputenc: {
1221                         int count = inputenc_arg.length();
1222                         if (oldEnc.package() == Encoding::CJK &&
1223                             open_encoding_ == CJK) {
1224                                 os << "\\end{CJK}";
1225                                 open_encoding_ = none;
1226                                 count += 9;
1227                         }
1228                         else if (oldEnc.package() == Encoding::inputenc &&
1229                                  open_encoding_ == inputenc) {
1230                                 os << "\\egroup";
1231                                 open_encoding_ = none;
1232                                 count += 7;
1233                         }
1234                         if (runparams.local_font != 0
1235                             &&  oldEnc.package() == Encoding::CJK) {
1236                                 // within insets, \inputenc switches need
1237                                 // to be embraced within \bgroup...\egroup;
1238                                 // else CJK fails.
1239                                 os << "\\bgroup";
1240                                 count += 7;
1241                                 open_encoding_ = inputenc;
1242                         }
1243                         // with the japanese option, inputenc is omitted.
1244                         if (runparams.use_japanese)
1245                                 return make_pair(true, count);
1246                         os << "\\inputencoding{" << inputenc_arg << '}';
1247                         return make_pair(true, count + 16);
1248                 }
1249                 case Encoding::CJK: {
1250                         int count = inputenc_arg.length();
1251                         if (oldEnc.package() == Encoding::CJK &&
1252                             open_encoding_ == CJK) {
1253                                 os << "\\end{CJK}";
1254                                 count += 9;
1255                         }
1256                         if (oldEnc.package() == Encoding::inputenc &&
1257                             open_encoding_ == inputenc) {
1258                                 os << "\\egroup";
1259                                 count += 7;
1260                         }
1261                         os << "\\begin{CJK}{" << inputenc_arg << "}{"
1262                            << from_ascii(bparams.fonts_cjk) << "}";
1263                         open_encoding_ = CJK;
1264                         return make_pair(true, count + 15);
1265                 }
1266         }
1267         // Dead code to avoid a warning:
1268         return make_pair(true, 0);
1269
1270 }
1271
1272 } // namespace lyx