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 "support/debug.h"
  18 #include "Encoding.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 "paragraph_funcs.h"
  26 #include "ParagraphParameters.h"
  27 #include "TextClass.h"
  28 #include "TexRow.h"
  29 #include "VSpace.h"
  30
  31 #include "insets/InsetBibitem.h"
  32 #include "insets/InsetOptArg.h"
  33
  34 #include "support/lstrings.h"
  35
  36 #include <boost/next_prior.hpp>
  37
  38 namespace lyx {
  39
  40 using support::subst;
  41
  42 using std::endl;
  43 using std::string;
  44 using std::pair;
  45 using std::make_pair;
  46
  47
  48 namespace {
  49
  50
  51 enum OpenEncoding {
  52                 none,
  53                 inputenc,
  54                 CJK
  55         };
  56
  57 static int open_encoding_ = none;
  58 static bool cjk_inherited_ = false;
  59
  60
  61 ParagraphList::const_iterator
  62 TeXEnvironment(Buffer const & buf,
  63                ParagraphList const & paragraphs,
  64                ParagraphList::const_iterator pit,
  65                odocstream & os, TexRow & texrow,
  66                OutputParams const & runparams);
  67
  68 ParagraphList::const_iterator
  69 TeXOnePar(Buffer const & buf,
  70           ParagraphList const & paragraphs,
  71           ParagraphList::const_iterator pit,
  72           odocstream & os, TexRow & texrow,
  73           OutputParams const & runparams,
  74           string const & everypar = string());
  75
  76
  77 ParagraphList::const_iterator
  78 TeXDeeper(Buffer const & buf,
  79           ParagraphList const & paragraphs,
  80           ParagraphList::const_iterator pit,
  81           odocstream & os, TexRow & texrow,
  82           OutputParams const & runparams)
  83 {
  84         LYXERR(Debug::LATEX, "TeXDeeper...     " << &*pit);
  85         ParagraphList::const_iterator par = pit;
  86
  87         while (par != paragraphs.end() &&
  88                      par->params().depth() == pit->params().depth()) {
  89                 if (par->layout()->isEnvironment()) {
  90                         par = TeXEnvironment(buf, paragraphs, par,
  91                                              os, texrow, runparams);
  92                 } else {
  93                         par = TeXOnePar(buf, paragraphs, par,
  94                                              os, texrow, runparams);
  95                 }
  96         }
  97         LYXERR(Debug::LATEX, "TeXDeeper...done ");
  98
  99         return par;
 100 }
 101
 102
 103 ParagraphList::const_iterator
 104 TeXEnvironment(Buffer const & buf,
 105                ParagraphList const & paragraphs,
 106                ParagraphList::const_iterator pit,
 107                odocstream & os, TexRow & texrow,
 108                OutputParams const & runparams)
 109 {
 110         LYXERR(Debug::LATEX, "TeXEnvironment...     " << &*pit);
 111
 112         BufferParams const & bparams = buf.params();
 113
 114         LayoutPtr const & style = pit->layout();
 115
 116         Language const * const par_language = pit->getParLanguage(bparams);
 117         Language const * const doc_language = bparams.language;
 118         Language const * const prev_par_language =
 119                 (pit != paragraphs.begin())
 120                 ? boost::prior(pit)->getParLanguage(bparams)
 121                 : doc_language;
 122         if (par_language->babel() != prev_par_language->babel()) {
 123
 124                 if (!lyxrc.language_command_end.empty() &&
 125                     prev_par_language->babel() != doc_language->babel() &&
 126                     !prev_par_language->babel().empty()) {
 127                         os << from_ascii(subst(
 128                                 lyxrc.language_command_end,
 129                                 "$$lang",
 130                                 prev_par_language->babel()))
 131                            // the '%' is necessary to prevent unwanted whitespace
 132                            << "%\n";
 133                         texrow.newline();
 134                 }
 135
 136                 if ((lyxrc.language_command_end.empty() ||
 137                      par_language->babel() != doc_language->babel()) &&
 138                     !par_language->babel().empty()) {
 139                         os << from_ascii(subst(
 140                                 lyxrc.language_command_begin,
 141                                 "$$lang",
 142                                 par_language->babel()))
 143                            // the '%' is necessary to prevent unwanted whitespace
 144                            << "%\n";
 145                         texrow.newline();
 146                 }
 147         }
 148
 149         bool leftindent_open = false;
 150         if (!pit->params().leftIndent().zero()) {
 151                 os << "\\begin{LyXParagraphLeftIndent}{"
 152                    << from_ascii(pit->params().leftIndent().asLatexString())
 153                    << "}\n";
 154                 texrow.newline();
 155                 leftindent_open = true;
 156         }
 157
 158         if (style->isEnvironment()) {
 159                 os << "\\begin{" << from_ascii(style->latexname()) << '}';
 160                 if (style->optionalargs > 0) {
 161                         int ret = latexOptArgInsets(buf, *pit, os, runparams,
 162                                                     style->optionalargs);
 163                         while (ret > 0) {
 164                                 texrow.newline();
 165                                 --ret;
 166                         }
 167                 }
 168                 if (style->latextype == LATEX_LIST_ENVIRONMENT) {
 169                         os << '{'
 170                            << pit->params().labelWidthString()
 171                            << "}\n";
 172                 } else if (style->labeltype == LABEL_BIBLIO) {
 173                         // ale970405
 174                         os << '{' << bibitemWidest(buf) << "}\n";
 175                 } else
 176                         os << from_ascii(style->latexparam()) << '\n';
 177                 texrow.newline();
 178         }
 179
 180         // in multilingual environments, the CJK tags have to be nested properly
 181         bool cjk_nested = false;
 182         if (par_language->encoding()->package() == Encoding::CJK &&
 183             open_encoding_ != CJK && pit->isMultiLingual(bparams)) {
 184                 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 185                    << "}{}%\n";
 186                 open_encoding_ = CJK;
 187                 cjk_nested = true;
 188                 texrow.newline();
 189         }
 190
 191         ParagraphList::const_iterator par = pit;
 192         do {
 193                 par = TeXOnePar(buf, paragraphs, par, os, texrow, runparams);
 194
 195                 if (par == paragraphs.end()) {
 196                         // Make sure that the last paragraph is
 197                         // correctly terminated (because TeXOnePar does
 198                         // not add a \n in this case)
 199                         os << '\n';
 200                         texrow.newline();
 201                 } else if (par->params().depth() > pit->params().depth()) {
 202                         if (par->layout()->isParagraph()) {
 203                           // Thinko!
 204                           // How to handle this? (Lgb)
 205                           //&& !suffixIs(os, "\n\n")
 206                                   //) {
 207
 208                                 // There should be at least one '\n' already
 209                                 // but we need there to be two for Standard
 210                                 // paragraphs that are depth-increment'ed to be
 211                                 // output correctly.  However, tables can
 212                                 // also be paragraphs so don't adjust them.
 213                                 // ARRae
 214                                 // Thinkee:
 215                                 // Will it ever harm to have one '\n' too
 216                                 // many? i.e. that we sometimes will have
 217                                 // three in a row. (Lgb)
 218                                 os << '\n';
 219                                 texrow.newline();
 220                         }
 221                         par = TeXDeeper(buf, paragraphs, par, os, texrow,
 222                                         runparams);
 223                 }
 224         } while (par != paragraphs.end()
 225                  && par->layout() == pit->layout()
 226                  && par->params().depth() == pit->params().depth()
 227                  && par->params().leftIndent() == pit->params().leftIndent());
 228
 229         if (open_encoding_ == CJK && cjk_nested) {
 230                 // We need to close the encoding even if it does not change
 231                 // to do correct environment nesting
 232                 os << "\\end{CJK}\n";
 233                 texrow.newline();
 234                 open_encoding_ = none;
 235         }
 236
 237         if (style->isEnvironment()) {
 238                 os << "\\end{" << from_ascii(style->latexname()) << "}\n";
 239                 texrow.newline();
 240         }
 241
 242         if (leftindent_open) {
 243                 os << "\\end{LyXParagraphLeftIndent}\n";
 244                 texrow.newline();
 245         }
 246
 247         if (par != paragraphs.end())
 248                 LYXERR(Debug::LATEX, "TeXEnvironment...done " << &*par);
 249
 250         return par;
 251 }
 252
 253 }
 254
 255
 256 int latexOptArgInsets(Buffer const & buf, Paragraph const & par,
 257                       odocstream & os, OutputParams const & runparams, int number)
 258 {
 259         int lines = 0;
 260
 261         InsetList::const_iterator it = par.insetList().begin();
 262         InsetList::const_iterator end = par.insetList().end();
 263         for (; it != end && number > 0 ; ++it) {
 264                 if (it->inset->lyxCode() == OPTARG_CODE) {
 265                         InsetOptArg * ins =
 266                                 static_cast<InsetOptArg *>(it->inset);
 267                         lines += ins->latexOptional(buf, os, runparams);
 268                         --number;
 269                 }
 270         }
 271         return lines;
 272 }
 273
 274
 275 namespace {
 276
 277 ParagraphList::const_iterator
 278 TeXOnePar(Buffer const & buf,
 279           ParagraphList const & paragraphs,
 280           ParagraphList::const_iterator pit,
 281           odocstream & os, TexRow & texrow,
 282           OutputParams const & runparams_in,
 283           string const & everypar)
 284 {
 285         LYXERR(Debug::LATEX, "TeXOnePar...     " << &*pit << " '"
 286                 << everypar << "'");
 287         BufferParams const & bparams = buf.params();
 288         LayoutPtr style;
 289
 290         if (runparams_in.verbatim) {
 291                 int const dist = std::distance(paragraphs.begin(), pit);
 292                 Font const outerfont = outerFont(dist, paragraphs);
 293
 294                 // No newline if only one paragraph in this lyxtext
 295                 if (dist > 0) {
 296                         os << '\n';
 297                         texrow.newline();
 298                 }
 299
 300                 /*bool need_par = */ pit->latex(buf, bparams, outerfont,
 301                         os, texrow, runparams_in);
 302
 303                 return ++pit;
 304         }
 305
 306         // In an inset with unlimited length (all in one row),
 307         // force layout to default
 308         if (!pit->forceDefaultParagraphs())
 309                 style = pit->layout();
 310         else
 311                 style = bparams.getTextClass().defaultLayout();
 312
 313         OutputParams runparams = runparams_in;
 314         runparams.moving_arg |= style->needprotect;
 315
 316         // we are at the beginning of an inset and CJK is already open.
 317         if (pit == paragraphs.begin() && runparams.local_font != 0 &&
 318             open_encoding_ == CJK) {
 319                 cjk_inherited_ = true;
 320                 open_encoding_ = none;
 321         }
 322
 323         if (pit == paragraphs.begin() && runparams.local_font == 0) {
 324                 // Open a CJK environment at the beginning of the main buffer
 325                 // if the document's language is a CJK language
 326                 if (bparams.encoding().package() == Encoding::CJK) {
 327                         os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
 328                         << "}{}%\n";
 329                         texrow.newline();
 330                         open_encoding_ = CJK;
 331                 }
 332                 if (!lyxrc.language_auto_begin && !bparams.language->babel().empty()) {
 333                         // FIXME UNICODE
 334                         os << from_utf8(subst(lyxrc.language_command_begin,
 335                                              "$$lang",
 336                                              bparams.language->babel()))
 337                            << '\n';
 338                 texrow.newline();
 339                 }
 340         }
 341
 342         // This paragraph's language
 343         Language const * const par_language = pit->getParLanguage(bparams);
 344         // The document's language
 345         Language const * const doc_language = bparams.language;
 346         // The language that was in effect when the environment this paragraph is
 347         // inside of was opened
 348         Language const * const outer_language =
 349                 (runparams.local_font != 0) ?
 350                         runparams.local_font->language() : doc_language;
 351         // The previous language that was in effect is either the language of
 352         // the previous paragraph, if there is one, or else the outer language
 353         // if there is no previous paragraph
 354         Language const * const prev_language =
 355                 (pit != paragraphs.begin()) ?
 356                         boost::prior(pit)->getParLanguage(bparams) : outer_language;
 357
 358         if (par_language->babel() != prev_language->babel()
 359             // check if we already put language command in TeXEnvironment()
 360             && !(style->isEnvironment()
 361                  && (pit == paragraphs.begin() ||
 362                      (boost::prior(pit)->layout() != pit->layout() &&
 363                       boost::prior(pit)->getDepth() <= pit->getDepth())
 364                      || boost::prior(pit)->getDepth() < pit->getDepth())))
 365         {
 366                 if (!lyxrc.language_command_end.empty() &&
 367                     prev_language->babel() != outer_language->babel() &&
 368                     !prev_language->babel().empty())
 369                 {
 370                         os << from_ascii(subst(lyxrc.language_command_end,
 371                                 "$$lang",
 372                                 prev_language->babel()))
 373                            // the '%' is necessary to prevent unwanted whitespace
 374                            << "%\n";
 375                         texrow.newline();
 376                 }
 377
 378                 // We need to open a new language if we couldn't close the previous
 379                 // one (because there's no language_command_end); and even if we closed
 380                 // the previous one, if the current language is different than the
 381                 // outer_language (which is currently in effect once the previous one
 382                 // is closed).
 383                 if ((lyxrc.language_command_end.empty() ||
 384                      par_language->babel() != outer_language->babel()) &&
 385                     !par_language->babel().empty()) {
 386                         // If we're inside an inset, and that inset is within an \L or \R
 387                         // (or equivalents), then within the inset, too, any opposite
 388                         // language paragraph should appear within an \L or \R (in addition
 389                         // to, outside of, the normal language switch commands).
 390                         // This behavior is not correct for ArabTeX, though.
 391                         if (    // not for ArabTeX
 392                                         (par_language->lang() != "arabic_arabtex" &&
 393                                          outer_language->lang() != "arabic_arabtex") &&
 394                                         // are we in an inset?
 395                                         runparams.local_font != 0 &&
 396                                         // is the inset within an \L or \R?
 397                                         //
 398                                         // FIXME: currently, we don't check this; this means that
 399                                         // we'll have unnnecessary \L and \R commands, but that
 400                                         // doesn't seem to hurt (though latex will complain)
 401                                         //
 402                                         // is this paragraph in the opposite direction?
 403                                         runparams.local_font->isRightToLeft() !=
 404                                                 par_language->rightToLeft()
 405                                 ) {
 406                                 // FIXME: I don't have a working copy of the Arabi package, so
 407                                 // I'm not sure if the farsi and arabic_arabi stuff is correct
 408                                 // or not...
 409                                 if (par_language->lang() == "farsi")
 410                                         os << "\\textFR{";
 411                                 else if (outer_language->lang() == "farsi")
 412                                         os << "\\textLR{";
 413                                 else if (par_language->lang() == "arabic_arabi")
 414                                         os << "\\textAR{";
 415                                 else if (outer_language->lang() == "arabic_arabi")
 416                                         os << "\\textLR{";
 417                                 // remaining RTL languages currently is hebrew
 418                                 else if (par_language->rightToLeft())
 419                                         os << "\\R{";
 420                                 else
 421                                         os << "\\L{";
 422                         }
 423                         // With CJK, the CJK tag has to be closed first (see below)
 424                         if (runparams.encoding->package() != Encoding::CJK) {
 425                                 os << from_ascii(subst(
 426                                         lyxrc.language_command_begin,
 427                                         "$$lang",
 428                                         par_language->babel()))
 429                                    // the '%' is necessary to prevent unwanted whitespace
 430                                    << "%\n";
 431                                 texrow.newline();
 432                         }
 433                 }
 434         }
 435
 436         // Switch file encoding if necessary; no need to do this for "default"
 437         // encoding, since this only affects the position of the outputted
 438         // \inputencoding command; the encoding switch will occur when necessary
 439         if (bparams.inputenc == "auto" &&
 440             runparams.encoding->package() != Encoding::none) {
 441                 // Look ahead for future encoding changes.
 442                 // We try to output them at the beginning of the paragraph,
 443                 // since the \inputencoding command is not allowed e.g. in
 444                 // sections.
 445                 for (pos_type i = 0; i < pit->size(); ++i) {
 446                         char_type const c = pit->getChar(i);
 447                         if (runparams.encoding->package() == Encoding::inputenc && c < 0x80)
 448                                 continue;
 449                         if (pit->isInset(i))
 450                                 break;
 451                         // All characters before c are in the ASCII range, and
 452                         // c is non-ASCII (but no inset), so change the
 453                         // encoding to that required by the language of c.
 454                         Encoding const * const encoding =
 455                                 pit->getFontSettings(bparams, i).language()->encoding();
 456
 457                         // with CJK, only add switch if we have CJK content at the beginning
 458                         // of the paragraph
 459                         if (encoding->package() != Encoding::CJK || i == 0) {
 460                                 OutputParams tmp_rp = runparams;
 461                                 runparams.moving_arg = false;
 462                                 pair<bool, int> enc_switch = switchEncoding(os, bparams, runparams,
 463                                         *(runparams.encoding), *encoding);
 464                                 runparams = tmp_rp;
 465                                 // the following is necessary after a CJK environment in a multilingual
 466                                 // context (nesting issue).
 467                                 if (par_language->encoding()->package() == Encoding::CJK &&
 468                                     open_encoding_ != CJK && !cjk_inherited_) {
 469                                         os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 470                                            << "}{}%\n";
 471                                         open_encoding_ = CJK;
 472                                         texrow.newline();
 473                                 }
 474                                 if (encoding->package() != Encoding::none && enc_switch.first) {
 475                                         if (enc_switch.second > 0) {
 476                                                 // the '%' is necessary to prevent unwanted whitespace
 477                                                 os << "%\n";
 478                                                 texrow.newline();
 479                                         }
 480                                         // With CJK, the CJK tag had to be closed first (see above)
 481                                         if (runparams.encoding->package() == Encoding::CJK) {
 482                                                 os << from_ascii(subst(
 483                                                         lyxrc.language_command_begin,
 484                                                         "$$lang",
 485                                                         par_language->babel()))
 486                                                 // the '%' is necessary to prevent unwanted whitespace
 487                                                 << "%\n";
 488                                                 texrow.newline();
 489                                         }
 490                                         runparams.encoding = encoding;
 491                                 }
 492                                 break;
 493                         }
 494                 }
 495         }
 496
 497         // In an inset with unlimited length (all in one row),
 498         // don't allow any special options in the paragraph
 499         if (!pit->forceDefaultParagraphs()) {
 500                 if (pit->params().startOfAppendix()) {
 501                         os << "\\appendix\n";
 502                         texrow.newline();
 503                 }
 504
 505                 if (!pit->params().spacing().isDefault()
 506                         && (pit == paragraphs.begin()
 507                             || !boost::prior(pit)->hasSameLayout(*pit)))
 508                 {
 509                         os << from_ascii(pit->params().spacing().writeEnvirBegin())
 510                             << '\n';
 511                         texrow.newline();
 512                 }
 513
 514                 if (style->isCommand()) {
 515                         os << '\n';
 516                         texrow.newline();
 517                 }
 518         }
 519
 520         switch (style->latextype) {
 521         case LATEX_COMMAND:
 522                 os << '\\' << from_ascii(style->latexname());
 523
 524                 // Separate handling of optional argument inset.
 525                 if (style->optionalargs > 0) {
 526                         int ret = latexOptArgInsets(buf, *pit, os, runparams,
 527                                                     style->optionalargs);
 528                         while (ret > 0) {
 529                                 texrow.newline();
 530                                 --ret;
 531                         }
 532                 }
 533                 else
 534                         os << from_ascii(style->latexparam());
 535                 break;
 536         case LATEX_ITEM_ENVIRONMENT:
 537         case LATEX_LIST_ENVIRONMENT:
 538                 os << "\\item ";
 539                 break;
 540         case LATEX_BIB_ENVIRONMENT:
 541                 // ignore this, the inset will write itself
 542                 break;
 543         default:
 544                 break;
 545         }
 546
 547         Font const outerfont =
 548                 outerFont(std::distance(paragraphs.begin(), pit),
 549                           paragraphs);
 550
 551         // FIXME UNICODE
 552         os << from_utf8(everypar);
 553         bool need_par = pit->latex(buf, bparams, outerfont,
 554                                              os, texrow, runparams);
 555
 556         // Make sure that \\par is done with the font of the last
 557         // character if this has another size as the default.
 558         // This is necessary because LaTeX (and LyX on the screen)
 559         // calculates the space between the baselines according
 560         // to this font. (Matthias)
 561         //
 562         // Is this really needed ? (Dekel)
 563         // We do not need to use to change the font for the last paragraph
 564         // or for a command.
 565
 566         Font const font =
 567                 (pit->empty()
 568                  ? pit->getLayoutFont(bparams, outerfont)
 569                  : pit->getFont(bparams, pit->size() - 1, outerfont));
 570
 571         bool is_command = style->isCommand();
 572
 573         if (style->resfont.size() != font.fontInfo().size()
 574             && boost::next(pit) != paragraphs.end()
 575             && !is_command) {
 576                 if (!need_par)
 577                         os << '{';
 578                 os << "\\" << from_ascii(font.latexSize()) << " \\par}";
 579         } else if (need_par) {
 580                 os << "\\par}";
 581         } else if (is_command)
 582                 os << '}';
 583
 584         bool pending_newline = false;
 585         switch (style->latextype) {
 586         case LATEX_ITEM_ENVIRONMENT:
 587         case LATEX_LIST_ENVIRONMENT:
 588                 if (boost::next(pit) != paragraphs.end()
 589                     && (pit->params().depth() < boost::next(pit)->params().depth()))
 590                         pending_newline = true;
 591                 break;
 592         case LATEX_ENVIRONMENT: {
 593                 // if its the last paragraph of the current environment
 594                 // skip it otherwise fall through
 595                 ParagraphList::const_iterator next = boost::next(pit);
 596
 597                 if (next != paragraphs.end()
 598                     && (next->layout() != pit->layout()
 599                         || next->params().depth() != pit->params().depth()))
 600                         break;
 601         }
 602
 603                 // fall through possible
 604         default:
 605                 // we don't need it for the last paragraph!!!
 606                 if (boost::next(pit) != paragraphs.end())
 607                         pending_newline = true;
 608         }
 609
 610         if (!pit->forceDefaultParagraphs()) {
 611                 if (!pit->params().spacing().isDefault()
 612                         && (boost::next(pit) == paragraphs.end()
 613                             || !boost::next(pit)->hasSameLayout(*pit)))
 614                 {
 615                         if (pending_newline) {
 616                                 os << '\n';
 617                                 texrow.newline();
 618                         }
 619                         os << from_ascii(pit->params().spacing().writeEnvirEnd());
 620                         pending_newline = true;
 621                 }
 622         }
 623
 624         // Closing the language is needed for the last paragraph; it is also
 625         // needed if we're within an \L or \R that we may have opened above (not
 626         // necessarily in this paragraph) and are about to close.
 627         bool closing_rtl_ltr_environment =
 628                 // not for ArabTeX
 629                 (par_language->lang() != "arabic_arabtex" &&
 630                  outer_language->lang() != "arabic_arabtex") &&
 631                 // have we opened and \L or \R environment?
 632                 runparams.local_font != 0 &&
 633                 runparams.local_font->isRightToLeft() != par_language->rightToLeft() &&
 634                 // are we about to close the language?
 635                 ((boost::next(pit) != paragraphs.end() &&
 636                   par_language->babel() !=
 637                         (boost::next(pit)->getParLanguage(bparams))->babel()) ||
 638                  (boost::next(pit) == paragraphs.end() &&
 639                   par_language->babel() != outer_language->babel()));
 640
 641         if (closing_rtl_ltr_environment || (boost::next(pit) == paragraphs.end()
 642             && par_language->babel() != outer_language->babel())) {
 643                 // Since \selectlanguage write the language to the aux file,
 644                 // we need to reset the language at the end of footnote or
 645                 // float.
 646
 647                 if (pending_newline) {
 648                         os << '\n';
 649                         texrow.newline();
 650                 }
 651                 // when the paragraph uses CJK, the language has to be closed earlier
 652                 if (font.language()->encoding()->package() != Encoding::CJK) {
 653                         if (lyxrc.language_command_end.empty()) {
 654                                 if (!prev_language->babel().empty()) {
 655                                         os << from_ascii(subst(
 656                                                 lyxrc.language_command_begin,
 657                                                 "$$lang",
 658                                                 prev_language->babel()));
 659                                         pending_newline = true;
 660                                 }
 661                         } else if (!par_language->babel().empty()) {
 662                                 os << from_ascii(subst(
 663                                         lyxrc.language_command_end,
 664                                         "$$lang",
 665                                         par_language->babel()));
 666                                 pending_newline = true;
 667                         }
 668                 }
 669         }
 670         if (closing_rtl_ltr_environment)
 671                 os << "}";
 672
 673         if (pending_newline) {
 674                 os << '\n';
 675                 texrow.newline();
 676         }
 677
 678         // if this is a CJK-paragraph and the next isn't, close CJK
 679         // also if the next paragraph is a multilingual environment (because of nesting)
 680         if (boost::next(pit) != paragraphs.end() && open_encoding_ == CJK &&
 681             (boost::next(pit)->getParLanguage(bparams)->encoding()->package() != Encoding::CJK ||
 682              boost::next(pit)->layout()->isEnvironment() && boost::next(pit)->isMultiLingual(bparams))
 683              // in environments, CJK has to be closed later (nesting!)
 684              && !style->isEnvironment()) {
 685                 os << "\\end{CJK}\n";
 686                 open_encoding_ = none;
 687         }
 688
 689         // If this is the last paragraph, close the CJK environment
 690         // if necessary. If it's an environment, we'll have to \end that first.
 691         if (boost::next(pit) == paragraphs.end() && !style->isEnvironment()) {
 692                 switch (open_encoding_) {
 693                         case CJK: {
 694                                 // end of main text
 695                                 if (runparams.local_font == 0) {
 696                                         os << '\n';
 697                                         texrow.newline();
 698                                         os << "\\end{CJK}\n";
 699                                         texrow.newline();
 700                                 // end of an inset
 701                                 } else
 702                                         os << "\\end{CJK}";
 703                                 open_encoding_ = none;
 704                                 break;
 705                         }
 706                         case inputenc: {
 707                                 os << "\\egroup";
 708                                 open_encoding_ = none;
 709                                 break;
 710                         }
 711                         case none:
 712                         default:
 713                                 // do nothing
 714                                 break;
 715                 }
 716                 // auto_end tag only if the last par is in a babel language
 717                 if (runparams.local_font == 0 && !lyxrc.language_auto_end &&
 718                     !bparams.language->babel().empty() &&
 719                     font.language()->encoding()->package() != Encoding::CJK) {
 720                         os << from_utf8(subst(lyxrc.language_command_end,
 721                                               "$$lang",
 722                                               bparams.language->babel()))
 723                            << '\n';
 724                         texrow.newline();
 725                 }
 726         }
 727
 728         // If this is the last paragraph, and a local_font was set upon entering
 729         // the inset, the encoding should be set back to that local_font's
 730         // encoding. We don't use switchEncoding(), because no explicit encoding
 731         // switch command is needed, since latex will automatically revert to it
 732         // when this inset closes.
 733         // This switch is only necessary if we're using "auto" or "default"
 734         // encoding.
 735         if (boost::next(pit) == paragraphs.end() && runparams_in.local_font != 0) {
 736                 runparams_in.encoding = runparams_in.local_font->language()->encoding();
 737                 if (bparams.inputenc == "auto" || bparams.inputenc == "default")
 738                         os << setEncoding(runparams_in.encoding->iconvName());
 739
 740         }
 741         // Otherwise, the current encoding should be set for the next paragraph.
 742         else
 743                 runparams_in.encoding = runparams.encoding;
 744
 745
 746         // we don't need it for the last paragraph!!!
 747         // Note from JMarc: we will re-add a \n explicitely in
 748         // TeXEnvironment, because it is needed in this case
 749         if (boost::next(pit) != paragraphs.end()) {
 750                 os << '\n';
 751                 texrow.newline();
 752         }
 753
 754         if (boost::next(pit) != paragraphs.end())
 755                 LYXERR(Debug::LATEX, "TeXOnePar...done " << &*boost::next(pit));
 756
 757         return ++pit;
 758 }
 759
 760 } // anon namespace
 761
 762
 763 // LaTeX all paragraphs
 764 void latexParagraphs(Buffer const & buf,
 765                      ParagraphList const & paragraphs,
 766                      odocstream & os,
 767                      TexRow & texrow,
 768                      OutputParams const & runparams,
 769                      string const & everypar)
 770 {
 771         bool was_title = false;
 772         bool already_title = false;
 773         TextClass const & tclass = buf.params().getTextClass();
 774         ParagraphList::const_iterator par = paragraphs.begin();
 775         ParagraphList::const_iterator endpar = paragraphs.end();
 776
 777         BOOST_ASSERT(runparams.par_begin <= runparams.par_end);
 778         // if only part of the paragraphs will be outputed
 779         if (runparams.par_begin !=  runparams.par_end) {
 780                 par = boost::next(paragraphs.begin(), runparams.par_begin);
 781                 endpar = boost::next(paragraphs.begin(), runparams.par_end);
 782                 // runparams will be passed to nested paragraphs, so
 783                 // we have to reset the range parameters.
 784                 const_cast<OutputParams&>(runparams).par_begin = 0;
 785                 const_cast<OutputParams&>(runparams).par_end = 0;
 786         }
 787
 788         // if only_body
 789         while (par != endpar) {
 790                 ParagraphList::const_iterator lastpar = par;
 791                 // well we have to check if we are in an inset with unlimited
 792                 // length (all in one row) if that is true then we don't allow
 793                 // any special options in the paragraph and also we don't allow
 794                 // any environment other than the default layout of the
 795                 // text class to be valid!
 796                 if (!par->forceDefaultParagraphs()) {
 797                         LayoutPtr const & layout = par->layout();
 798
 799                         if (layout->intitle) {
 800                                 if (already_title) {
 801                                         lyxerr << "Error in latexParagraphs: You"
 802                                                 " should not mix title layouts"
 803                                                 " with normal ones." << endl;
 804                                 } else if (!was_title) {
 805                                         was_title = true;
 806                                         if (tclass.titletype() == TITLE_ENVIRONMENT) {
 807                                                 os << "\\begin{"
 808                                                     << from_ascii(tclass.titlename())
 809                                                     << "}\n";
 810                                                 texrow.newline();
 811                                         }
 812                                 }
 813                         } else if (was_title && !already_title) {
 814                                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
 815                                         os << "\\end{" << from_ascii(tclass.titlename())
 816                                             << "}\n";
 817                                 }
 818                                 else {
 819                                         os << "\\" << from_ascii(tclass.titlename())
 820                                             << "\n";
 821                                 }
 822                                 texrow.newline();
 823                                 already_title = true;
 824                                 was_title = false;
 825                         }
 826
 827                         if (layout->is_environment) {
 828                                 par = TeXOnePar(buf, paragraphs, par, os, texrow,
 829                                                 runparams, everypar);
 830                         } else if (layout->isEnvironment() ||
 831                                    !par->params().leftIndent().zero()) {
 832                                 par = TeXEnvironment(buf, paragraphs, par, os,
 833                                                      texrow, runparams);
 834                         } else {
 835                                 par = TeXOnePar(buf, paragraphs, par, os, texrow,
 836                                                 runparams, everypar);
 837                         }
 838                 } else {
 839                         par = TeXOnePar(buf, paragraphs, par, os, texrow,
 840                                         runparams, everypar);
 841                 }
 842                 if (std::distance(lastpar, par) >= std::distance(lastpar, endpar))
 843                         break;
 844         }
 845         // It might be that we only have a title in this document
 846         if (was_title && !already_title) {
 847                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
 848                         os << "\\end{" << from_ascii(tclass.titlename())
 849                             << "}\n";
 850                 }
 851                 else {
 852                         os << "\\" << from_ascii(tclass.titlename())
 853                             << "\n";
 854                                 }
 855                 texrow.newline();
 856         }
 857         // If the last paragraph is an environment, we'll have to close
 858         // CJK at the very end to do proper nesting.
 859         if (open_encoding_ == CJK) {
 860                 os << "\\end{CJK}\n";
 861                 texrow.newline();
 862                 open_encoding_ = none;
 863         }
 864         // reset inherited encoding
 865         if (cjk_inherited_) {
 866                 open_encoding_ = CJK;
 867                 cjk_inherited_ = false;
 868         }
 869 }
 870
 871
 872 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
 873                    OutputParams const & runparams, Encoding const & oldEnc,
 874                    Encoding const & newEnc)
 875 {
 876         bool moving_arg = runparams.moving_arg;
 877         if ((bparams.inputenc != "auto" && bparams.inputenc != "default")
 878                 || moving_arg)
 879                 return make_pair(false, 0);
 880
 881         // Do nothing if the encoding is unchanged.
 882         if (oldEnc.name() == newEnc.name())
 883                 return make_pair(false, 0);
 884
 885         // FIXME We ignore encoding switches from/to encodings that do
 886         // neither support the inputenc package nor the CJK package here.
 887         // This does of course only work in special cases (e.g. switch from
 888         // tis620-0 to latin1, but the text in latin1 contains ASCII only),
 889         // but it is the best we can do
 890         if (oldEnc.package() == Encoding::none
 891                 || newEnc.package() == Encoding::none)
 892                 return make_pair(false, 0);
 893
 894         LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
 895                 << oldEnc.name() << " to " << newEnc.name());
 896         os << setEncoding(newEnc.iconvName());
 897         if (bparams.inputenc == "default")
 898                 return make_pair(true, 0);
 899
 900         docstring const inputenc_arg(from_ascii(newEnc.latexName()));
 901         switch (newEnc.package()) {
 902                 case Encoding::none:
 903                         // shouldn't ever reach here, see above
 904                         return make_pair(true, 0);
 905                 case Encoding::inputenc: {
 906                         int count = inputenc_arg.length();
 907                         if (oldEnc.package() == Encoding::CJK &&
 908                             open_encoding_ == CJK) {
 909                                 os << "\\end{CJK}";
 910                                 open_encoding_ = none;
 911                                 count += 9;
 912                         }
 913                         else if (oldEnc.package() == Encoding::inputenc &&
 914                                  open_encoding_ == inputenc) {
 915                                 os << "\\egroup";
 916                                 open_encoding_ = none;
 917                                 count += 7;
 918                         }
 919                         if (runparams.local_font != 0 && oldEnc.package() == Encoding::CJK) {
 920                                 // within insets, \inputenc switches need to be
 921                                 // embraced within \bgroup ... \egroup; else CJK fails.
 922                                 os << "\\bgroup";
 923                                 count += 7;
 924                                 open_encoding_ = inputenc;
 925                         }
 926                         os << "\\inputencoding{" << inputenc_arg << '}';
 927                         return make_pair(true, count + 16);
 928                 }
 929                 case Encoding::CJK: {
 930                         int count = inputenc_arg.length();
 931                         if (oldEnc.package() == Encoding::CJK &&
 932                             open_encoding_ == CJK) {
 933                                 os << "\\end{CJK}";
 934                                 count += 9;
 935                         }
 936                         if (oldEnc.package() == Encoding::inputenc &&
 937                             open_encoding_ == inputenc) {
 938                                 os << "\\egroup";
 939                                 count += 7;
 940                         }
 941                         os << "\\begin{CJK}{" << inputenc_arg << "}{}";
 942                         open_encoding_ = CJK;
 943                         return make_pair(true, count + 15);
 944                 }
 945         }
 946         // Dead code to avoid a warning:
 947         return make_pair(true, 0);
 948
 949 }
 950
 951 } // namespace lyx