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 "InsetList.h"
  19 #include "Language.h"
  20 #include "Layout.h"
  21 #include "LyXRC.h"
  22 #include "OutputParams.h"
  23 #include "Paragraph.h"
  24 #include "paragraph_funcs.h"
  25 #include "ParagraphParameters.h"
  26 #include "TextClass.h"
  27 #include "TexRow.h"
  28 #include "VSpace.h"
  29
  30 #include "insets/InsetBibitem.h"
  31 #include "insets/InsetOptArg.h"
  32
  33 #include "support/lassert.h"
  34 #include "support/debug.h"
  35 #include "support/lstrings.h"
  36
  37 #include <boost/next_prior.hpp>
  38
  39 using namespace std;
  40 using namespace lyx::support;
  41
  42
  43 namespace lyx {
  44
  45 namespace {
  46
  47 enum OpenEncoding {
  48                 none,
  49                 inputenc,
  50                 CJK
  51 };
  52
  53 static int open_encoding_ = none;
  54 static int cjk_inherited_ = 0;
  55
  56
  57 ParagraphList::const_iterator
  58 TeXEnvironment(Buffer const & buf,
  59                Text const & text,
  60                ParagraphList::const_iterator pit,
  61                odocstream & os, TexRow & texrow,
  62                OutputParams const & runparams);
  63
  64 ParagraphList::const_iterator
  65 TeXOnePar(Buffer const & buf,
  66           Text const & text,
  67           ParagraphList::const_iterator pit,
  68           odocstream & os, TexRow & texrow,
  69           OutputParams const & runparams,
  70           string const & everypar = string());
  71
  72
  73 ParagraphList::const_iterator
  74 TeXDeeper(Buffer const & buf,
  75           Text const & text,
  76           ParagraphList::const_iterator pit,
  77           odocstream & os, TexRow & texrow,
  78           OutputParams const & runparams)
  79 {
  80         LYXERR(Debug::LATEX, "TeXDeeper...     " << &*pit);
  81         ParagraphList::const_iterator par = pit;
  82
  83         ParagraphList const & paragraphs = text.paragraphs();
  84
  85         while (par != paragraphs.end() &&
  86                      par->params().depth() == pit->params().depth()) {
  87                 if (par->layout().isEnvironment()) {
  88                         par = TeXEnvironment(buf, text, par,
  89                                              os, texrow, runparams);
  90                 } else {
  91                         par = TeXOnePar(buf, text, par,
  92                                              os, texrow, runparams);
  93                 }
  94         }
  95         LYXERR(Debug::LATEX, "TeXDeeper...done ");
  96
  97         return par;
  98 }
  99
 100
 101 ParagraphList::const_iterator
 102 TeXEnvironment(Buffer const & buf,
 103                Text const & text,
 104                ParagraphList::const_iterator pit,
 105                odocstream & os, TexRow & texrow,
 106                OutputParams const & runparams)
 107 {
 108         LYXERR(Debug::LATEX, "TeXEnvironment...     " << &*pit);
 109
 110         BufferParams const & bparams = buf.params();
 111
 112         Layout const & style = pit->forcePlainLayout() ?
 113                 bparams.documentClass().plainLayout() : pit->layout();
 114
 115         ParagraphList const & paragraphs = text.paragraphs();
 116
 117         Language const * const par_language = pit->getParLanguage(bparams);
 118         Language const * const doc_language = bparams.language;
 119         Language const * const prev_par_language =
 120                 (pit != paragraphs.begin())
 121                 ? boost::prior(pit)->getParLanguage(bparams)
 122                 : doc_language;
 123         if (par_language->babel() != prev_par_language->babel()) {
 124
 125                 if (!lyxrc.language_command_end.empty() &&
 126                     prev_par_language->babel() != doc_language->babel() &&
 127                     !prev_par_language->babel().empty()) {
 128                         os << from_ascii(subst(
 129                                 lyxrc.language_command_end,
 130                                 "$$lang",
 131                                 prev_par_language->babel()))
 132                            // the '%' is necessary to prevent unwanted whitespace
 133                            << "%\n";
 134                         texrow.newline();
 135                 }
 136
 137                 if ((lyxrc.language_command_end.empty() ||
 138                      par_language->babel() != doc_language->babel()) &&
 139                     !par_language->babel().empty()) {
 140                         os << from_ascii(subst(
 141                                 lyxrc.language_command_begin,
 142                                 "$$lang",
 143                                 par_language->babel()))
 144                            // the '%' is necessary to prevent unwanted whitespace
 145                            << "%\n";
 146                         texrow.newline();
 147                 }
 148         }
 149
 150         bool leftindent_open = false;
 151         if (!pit->params().leftIndent().zero()) {
 152                 os << "\\begin{LyXParagraphLeftIndent}{"
 153                    << from_ascii(pit->params().leftIndent().asLatexString())
 154                    << "}\n";
 155                 texrow.newline();
 156                 leftindent_open = true;
 157         }
 158
 159         if (style.isEnvironment()) {
 160                 os << "\\begin{" << from_ascii(style.latexname()) << '}';
 161                 if (style.optionalargs > 0) {
 162                         int ret = latexOptArgInsets(*pit, os, runparams,
 163                                                     style.optionalargs);
 164                         while (ret > 0) {
 165                                 texrow.newline();
 166                                 --ret;
 167                         }
 168                 }
 169                 if (style.latextype == LATEX_LIST_ENVIRONMENT) {
 170                         os << '{'
 171                            << pit->params().labelWidthString()
 172                            << "}\n";
 173                 } else if (style.labeltype == LABEL_BIBLIO) {
 174                         // ale970405
 175                         os << '{' << bibitemWidest(buf) << "}\n";
 176                 } else
 177                         os << from_ascii(style.latexparam()) << '\n';
 178                 texrow.newline();
 179         }
 180
 181         // in multilingual environments, the CJK tags have to be nested properly
 182         bool cjk_nested = false;
 183         if (par_language->encoding()->package() == Encoding::CJK &&
 184             open_encoding_ != CJK && pit->isMultiLingual(bparams)) {
 185                 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 186                    << "}{" << from_ascii(bparams.fontsCJK) << "}%\n";
 187                 open_encoding_ = CJK;
 188                 cjk_nested = true;
 189                 texrow.newline();
 190         }
 191
 192         ParagraphList::const_iterator par = pit;
 193         do {
 194                 par = TeXOnePar(buf, text, par, os, texrow, runparams);
 195
 196                 if (par == paragraphs.end()) {
 197                         // Make sure that the last paragraph is
 198                         // correctly terminated (because TeXOnePar does
 199                         // not add a \n in this case)
 200                         os << '\n';
 201                         texrow.newline();
 202                 } else if (par->params().depth() > pit->params().depth()) {
 203                         if (par->layout().isParagraph()) {
 204                           // Thinko!
 205                           // How to handle this? (Lgb)
 206                           //&& !suffixIs(os, "\n\n")
 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, text, 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 } // namespace anon
 254
 255
 256 int latexOptArgInsets(Paragraph const & par, odocstream & os,
 257         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(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           Text const & text,
 280           ParagraphList::const_iterator const 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         ParagraphList const & paragraphs = text.paragraphs();
 289
 290         ParagraphList::const_iterator priorpit = pit;
 291         if (priorpit != paragraphs.begin())
 292                 --priorpit;
 293         ParagraphList::const_iterator nextpit = pit;
 294         if (nextpit != paragraphs.end())
 295                 ++nextpit;
 296
 297         OutputParams runparams = runparams_in;
 298         runparams.isLastPar = nextpit == paragraphs.end();
 299
 300         if (runparams.verbatim) {
 301                 int const dist = distance(paragraphs.begin(), pit);
 302                 Font const outerfont = outerFont(dist, paragraphs);
 303
 304                 // No newline if only one paragraph in this lyxtext
 305                 if (dist > 0) {
 306                         os << '\n';
 307                         texrow.newline();
 308                 }
 309
 310                 /*bool need_par = */ pit->latex(bparams, outerfont,
 311                         os, texrow, runparams);
 312                 return nextpit;
 313         }
 314
 315         Layout const style = pit->forcePlainLayout() ?
 316                 bparams.documentClass().plainLayout() : pit->layout();
 317
 318         runparams.moving_arg |= style.needprotect;
 319
 320         bool const maintext = text.isMainText(buf);
 321         // we are at the beginning of an inset and CJK is already open;
 322         // we count inheritation levels to get the inset nesting right.
 323         if (pit == paragraphs.begin() && !maintext
 324             && (cjk_inherited_ > 0 || open_encoding_ == CJK)) {
 325                 cjk_inherited_ += 1;
 326                 open_encoding_ = none;
 327         }
 328
 329         // This paragraph's language
 330         Language const * const par_language = pit->getParLanguage(bparams);
 331         // The document's language
 332         Language const * const doc_language = bparams.language;
 333         // The language that was in effect when the environment this paragraph is
 334         // inside of was opened
 335         Language const * const outer_language =
 336                 (runparams.local_font != 0) ?
 337                         runparams.local_font->language() : doc_language;
 338         // The previous language that was in effect is either the language of
 339         // the previous paragraph, if there is one, or else the outer language
 340         // if there is no previous paragraph
 341         Language const * const prev_language =
 342                 (pit != paragraphs.begin()) ?
 343                         priorpit->getParLanguage(bparams) : outer_language;
 344
 345         if (par_language->babel() != prev_language->babel()
 346             // check if we already put language command in TeXEnvironment()
 347             && !(style.isEnvironment()
 348                  && (pit == paragraphs.begin() ||
 349                      (priorpit->layout() != pit->layout() &&
 350                       priorpit->getDepth() <= pit->getDepth())
 351                      || priorpit->getDepth() < pit->getDepth())))
 352         {
 353                 if (!lyxrc.language_command_end.empty() &&
 354                     prev_language->babel() != outer_language->babel() &&
 355                     !prev_language->babel().empty())
 356                 {
 357                         os << from_ascii(subst(lyxrc.language_command_end,
 358                                 "$$lang",
 359                                 prev_language->babel()))
 360                            // the '%' is necessary to prevent unwanted whitespace
 361                            << "%\n";
 362                         texrow.newline();
 363                 }
 364
 365                 // We need to open a new language if we couldn't close the previous
 366                 // one (because there's no language_command_end); and even if we closed
 367                 // the previous one, if the current language is different than the
 368                 // outer_language (which is currently in effect once the previous one
 369                 // is closed).
 370                 if ((lyxrc.language_command_end.empty() ||
 371                      par_language->babel() != outer_language->babel()) &&
 372                     !par_language->babel().empty()) {
 373                         // If we're inside an inset, and that inset is within an \L or \R
 374                         // (or equivalents), then within the inset, too, any opposite
 375                         // language paragraph should appear within an \L or \R (in addition
 376                         // to, outside of, the normal language switch commands).
 377                         // This behavior is not correct for ArabTeX, though.
 378                         if (    // not for ArabTeX
 379                                         (par_language->lang() != "arabic_arabtex" &&
 380                                          outer_language->lang() != "arabic_arabtex") &&
 381                                         // are we in an inset?
 382                                         runparams.local_font != 0 &&
 383                                         // is the inset within an \L or \R?
 384                                         //
 385                                         // FIXME: currently, we don't check this; this means that
 386                                         // we'll have unnnecessary \L and \R commands, but that
 387                                         // doesn't seem to hurt (though latex will complain)
 388                                         //
 389                                         // is this paragraph in the opposite direction?
 390                                         runparams.local_font->isRightToLeft() !=
 391                                                 par_language->rightToLeft()
 392                                 ) {
 393                                 // FIXME: I don't have a working copy of the Arabi package, so
 394                                 // I'm not sure if the farsi and arabic_arabi stuff is correct
 395                                 // or not...
 396                                 if (par_language->lang() == "farsi")
 397                                         os << "\\textFR{";
 398                                 else if (outer_language->lang() == "farsi")
 399                                         os << "\\textLR{";
 400                                 else if (par_language->lang() == "arabic_arabi")
 401                                         os << "\\textAR{";
 402                                 else if (outer_language->lang() == "arabic_arabi")
 403                                         os << "\\textLR{";
 404                                 // remaining RTL languages currently is hebrew
 405                                 else if (par_language->rightToLeft())
 406                                         os << "\\R{";
 407                                 else
 408                                         os << "\\L{";
 409                         }
 410                         // With CJK, the CJK tag has to be closed first (see below)
 411                         if (runparams.encoding->package() != Encoding::CJK) {
 412                                 os << from_ascii(subst(
 413                                         lyxrc.language_command_begin,
 414                                         "$$lang",
 415                                         par_language->babel()))
 416                                    // the '%' is necessary to prevent unwanted whitespace
 417                                    << "%\n";
 418                                 texrow.newline();
 419                         }
 420                 }
 421         }
 422
 423         // Switch file encoding if necessary; no need to do this for "default"
 424         // encoding, since this only affects the position of the outputted
 425         // \inputencoding command; the encoding switch will occur when necessary
 426         if (bparams.inputenc == "auto" &&
 427             runparams.encoding->package() != Encoding::none) {
 428                 // Look ahead for future encoding changes.
 429                 // We try to output them at the beginning of the paragraph,
 430                 // since the \inputencoding command is not allowed e.g. in
 431                 // sections.
 432                 for (pos_type i = 0; i < pit->size(); ++i) {
 433                         char_type const c = pit->getChar(i);
 434                         Encoding const * const encoding =
 435                                 pit->getFontSettings(bparams, i).language()->encoding();
 436                         if (encoding->package() != Encoding::CJK &&
 437                             runparams.encoding->package() == Encoding::inputenc &&
 438                             c < 0x80)
 439                                 continue;
 440                         if (pit->isInset(i))
 441                                 break;
 442                         // All characters before c are in the ASCII range, and
 443                         // c is non-ASCII (but no inset), so change the
 444                         // encoding to that required by the language of c.
 445                         // With CJK, only add switch if we have CJK content at the beginning
 446                         // of the paragraph
 447                         if (encoding->package() != Encoding::CJK || i == 0) {
 448                                 OutputParams tmp_rp = runparams;
 449                                 runparams.moving_arg = false;
 450                                 pair<bool, int> enc_switch = switchEncoding(os, bparams, runparams,
 451                                         *encoding);
 452                                 runparams = tmp_rp;
 453                                 // the following is necessary after a CJK environment in a multilingual
 454                                 // context (nesting issue).
 455                                 if (par_language->encoding()->package() == Encoding::CJK &&
 456                                     open_encoding_ != CJK && cjk_inherited_ == 0) {
 457                                         os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
 458                                            << "}{" << from_ascii(bparams.fontsCJK) << "}%\n";
 459                                         open_encoding_ = CJK;
 460                                         texrow.newline();
 461                                 }
 462                                 if (encoding->package() != Encoding::none && enc_switch.first) {
 463                                         if (enc_switch.second > 0) {
 464                                                 // the '%' is necessary to prevent unwanted whitespace
 465                                                 os << "%\n";
 466                                                 texrow.newline();
 467                                         }
 468                                         // With CJK, the CJK tag had to be closed first (see above)
 469                                         if (runparams.encoding->package() == Encoding::CJK) {
 470                                                 os << from_ascii(subst(
 471                                                         lyxrc.language_command_begin,
 472                                                         "$$lang",
 473                                                         par_language->babel()))
 474                                                 // the '%' is necessary to prevent unwanted whitespace
 475                                                 << "%\n";
 476                                                 texrow.newline();
 477                                         }
 478                                         runparams.encoding = encoding;
 479                                 }
 480                                 break;
 481                         }
 482                 }
 483         }
 484
 485         bool const useSetSpace = bparams.documentClass().provides("SetSpace");
 486         if (pit->allowParagraphCustomization()) {
 487                 if (pit->params().startOfAppendix()) {
 488                         os << "\\appendix\n";
 489                         texrow.newline();
 490                 }
 491
 492                 if (!pit->params().spacing().isDefault()
 493                         && (pit == paragraphs.begin()
 494                             || !priorpit->hasSameLayout(*pit)))
 495                 {
 496                         os << from_ascii(pit->params().spacing().writeEnvirBegin(useSetSpace))
 497                             << '\n';
 498                         texrow.newline();
 499                 }
 500
 501                 if (style.isCommand()) {
 502                         os << '\n';
 503                         texrow.newline();
 504                 }
 505         }
 506
 507         switch (style.latextype) {
 508         case LATEX_COMMAND:
 509                 os << '\\' << from_ascii(style.latexname());
 510
 511                 // Separate handling of optional argument inset.
 512                 if (style.optionalargs > 0) {
 513                         int ret = latexOptArgInsets(*pit, os, runparams,
 514                                                     style.optionalargs);
 515                         while (ret > 0) {
 516                                 texrow.newline();
 517                                 --ret;
 518                         }
 519                 }
 520                 else
 521                         os << from_ascii(style.latexparam());
 522                 break;
 523         case LATEX_ITEM_ENVIRONMENT:
 524         case LATEX_LIST_ENVIRONMENT:
 525                 os << "\\item ";
 526                 break;
 527         case LATEX_BIB_ENVIRONMENT:
 528                 // ignore this, the inset will write itself
 529                 break;
 530         default:
 531                 break;
 532         }
 533
 534         Font const outerfont = outerFont(distance(paragraphs.begin(), pit),
 535                           paragraphs);
 536
 537         // FIXME UNICODE
 538         os << from_utf8(everypar);
 539         bool need_par = pit->latex(bparams, outerfont,
 540                                              os, texrow, runparams);
 541
 542         // Make sure that \\par is done with the font of the last
 543         // character if this has another size as the default.
 544         // This is necessary because LaTeX (and LyX on the screen)
 545         // calculates the space between the baselines according
 546         // to this font. (Matthias)
 547         //
 548         // Is this really needed ? (Dekel)
 549         // We do not need to use to change the font for the last paragraph
 550         // or for a command.
 551
 552         Font const font = pit->empty()
 553                  ? pit->getLayoutFont(bparams, outerfont)
 554                  : pit->getFont(bparams, pit->size() - 1, outerfont);
 555
 556         bool is_command = style.isCommand();
 557
 558         if (style.resfont.size() != font.fontInfo().size()
 559             && nextpit != paragraphs.end()
 560             && !is_command) {
 561                 if (!need_par)
 562                         os << '{';
 563                 os << "\\" << from_ascii(font.latexSize()) << " \\par}";
 564         } else if (need_par) {
 565                 os << "\\par}";
 566         } else if (is_command)
 567                 os << '}';
 568
 569         bool pending_newline = false;
 570         switch (style.latextype) {
 571         case LATEX_ITEM_ENVIRONMENT:
 572         case LATEX_LIST_ENVIRONMENT:
 573                 if (nextpit != paragraphs.end()
 574                     && (pit->params().depth() < nextpit->params().depth()))
 575                         pending_newline = true;
 576                 break;
 577         case LATEX_ENVIRONMENT: {
 578                 // if its the last paragraph of the current environment
 579                 // skip it otherwise fall through
 580                 ParagraphList::const_iterator next = nextpit;
 581
 582                 if (next != paragraphs.end() && (next->layout() != pit->layout()
 583                         || next->params().depth() != pit->params().depth()))
 584                         break;
 585         }
 586
 587                 // fall through possible
 588         default:
 589                 // we don't need it for the last paragraph!!!
 590                 if (nextpit != paragraphs.end())
 591                         pending_newline = true;
 592         }
 593
 594         if (pit->allowParagraphCustomization()) {
 595                 if (!pit->params().spacing().isDefault()
 596                         && (nextpit == paragraphs.end() || !nextpit->hasSameLayout(*pit)))
 597                 {
 598                         if (pending_newline) {
 599                                 os << '\n';
 600                                 texrow.newline();
 601                         }
 602                         os << from_ascii(pit->params().spacing().writeEnvirEnd(useSetSpace));
 603                         pending_newline = true;
 604                 }
 605         }
 606
 607         // Closing the language is needed for the last paragraph; it is also
 608         // needed if we're within an \L or \R that we may have opened above (not
 609         // necessarily in this paragraph) and are about to close.
 610         bool closing_rtl_ltr_environment =
 611                 // not for ArabTeX
 612                 (par_language->lang() != "arabic_arabtex" &&
 613                  outer_language->lang() != "arabic_arabtex") &&
 614                 // have we opened and \L or \R environment?
 615                 runparams.local_font != 0 &&
 616                 runparams.local_font->isRightToLeft() != par_language->rightToLeft() &&
 617                 // are we about to close the language?
 618                 ((nextpit != paragraphs.end() &&
 619                   par_language->babel() !=
 620                         (nextpit->getParLanguage(bparams))->babel()) ||
 621                  (nextpit == paragraphs.end() &&
 622                   par_language->babel() != outer_language->babel()));
 623
 624         if (closing_rtl_ltr_environment || (nextpit == paragraphs.end()
 625             && par_language->babel() != outer_language->babel())) {
 626                 // Since \selectlanguage write the language to the aux file,
 627                 // we need to reset the language at the end of footnote or
 628                 // float.
 629
 630                 if (pending_newline) {
 631                         os << '\n';
 632                         texrow.newline();
 633                 }
 634                 // when the paragraph uses CJK, the language has to be closed earlier
 635                 if (font.language()->encoding()->package() != Encoding::CJK) {
 636                         if (lyxrc.language_command_end.empty()) {
 637                                 if (!prev_language->babel().empty()) {
 638                                         os << from_ascii(subst(
 639                                                 lyxrc.language_command_begin,
 640                                                 "$$lang",
 641                                                 prev_language->babel()));
 642                                         pending_newline = true;
 643                                 }
 644                         } else if (!par_language->babel().empty()) {
 645                                 os << from_ascii(subst(
 646                                         lyxrc.language_command_end,
 647                                         "$$lang",
 648                                         par_language->babel()));
 649                                 pending_newline = true;
 650                         }
 651                 }
 652         }
 653         if (closing_rtl_ltr_environment)
 654                 os << "}";
 655
 656         if (pending_newline) {
 657                 os << '\n';
 658                 texrow.newline();
 659         }
 660
 661         // if this is a CJK-paragraph and the next isn't, close CJK
 662         // also if the next paragraph is a multilingual environment (because of nesting)
 663         if (nextpit != paragraphs.end() && open_encoding_ == CJK &&
 664             (nextpit->getParLanguage(bparams)->encoding()->package() != Encoding::CJK ||
 665              nextpit->layout().isEnvironment() && nextpit->isMultiLingual(bparams))
 666              // in environments, CJK has to be closed later (nesting!)
 667              && !style.isEnvironment()) {
 668                 os << "\\end{CJK}\n";
 669                 open_encoding_ = none;
 670         }
 671
 672         // If this is the last paragraph, close the CJK environment
 673         // if necessary. If it's an environment, we'll have to \end that first.
 674         if (nextpit == paragraphs.end() && !style.isEnvironment()) {
 675                 switch (open_encoding_) {
 676                         case CJK: {
 677                                 // end of main text
 678                                 if (maintext) {
 679                                         os << '\n';
 680                                         texrow.newline();
 681                                         os << "\\end{CJK}\n";
 682                                         texrow.newline();
 683                                 // end of an inset
 684                                 } else
 685                                         os << "\\end{CJK}";
 686                                 open_encoding_ = none;
 687                                 break;
 688                         }
 689                         case inputenc: {
 690                                 os << "\\egroup";
 691                                 open_encoding_ = none;
 692                                 break;
 693                         }
 694                         case none:
 695                         default:
 696                                 // do nothing
 697                                 break;
 698                 }
 699         }
 700
 701         // If this is the last paragraph, and a local_font was set upon entering
 702         // the inset, and we're using "auto" or "default" encoding, the encoding
 703         // should be set back to that local_font's encoding.
 704         if (nextpit == paragraphs.end() && runparams_in.local_font != 0
 705             && runparams_in.encoding != runparams_in.local_font->language()->encoding()
 706             && (bparams.inputenc == "auto" || bparams.inputenc == "default")) {
 707                 runparams_in.encoding = runparams_in.local_font->language()->encoding();
 708                 os << setEncoding(runparams_in.encoding->iconvName());
 709         }
 710         // Otherwise, the current encoding should be set for the next paragraph.
 711         else
 712                 runparams_in.encoding = runparams.encoding;
 713
 714
 715         // we don't need it for the last paragraph!!!
 716         // Note from JMarc: we will re-add a \n explicitely in
 717         // TeXEnvironment, because it is needed in this case
 718         if (nextpit != paragraphs.end()) {
 719                 Layout const & next_layout = nextpit->layout();
 720                 // no blank lines before environments!
 721                 if (!next_layout.isEnvironment() || style == next_layout) {
 722                         os << '\n';
 723                         texrow.newline();
 724                 }
 725         }
 726
 727         if (nextpit != paragraphs.end())
 728                 LYXERR(Debug::LATEX, "TeXOnePar...done " << &*nextpit);
 729
 730         return nextpit;
 731 }
 732
 733 } // anon namespace
 734
 735
 736 // LaTeX all paragraphs
 737 void latexParagraphs(Buffer const & buf,
 738                      Text const & text,
 739                      odocstream & os,
 740                      TexRow & texrow,
 741                      OutputParams const & runparams,
 742                      string const & everypar)
 743 {
 744         bool was_title = false;
 745         bool already_title = false;
 746         BufferParams const & bparams = buf.params();
 747         DocumentClass const & tclass = bparams.documentClass();
 748         ParagraphList const & paragraphs = text.paragraphs();
 749         ParagraphList::const_iterator par = paragraphs.begin();
 750         ParagraphList::const_iterator endpar = paragraphs.end();
 751
 752         LASSERT(runparams.par_begin <= runparams.par_end, /**/);
 753         // if only part of the paragraphs will be outputed
 754         if (runparams.par_begin !=  runparams.par_end) {
 755                 par = boost::next(paragraphs.begin(), runparams.par_begin);
 756                 endpar = boost::next(paragraphs.begin(), runparams.par_end);
 757                 // runparams will be passed to nested paragraphs, so
 758                 // we have to reset the range parameters.
 759                 const_cast<OutputParams&>(runparams).par_begin = 0;
 760                 const_cast<OutputParams&>(runparams).par_end = 0;
 761         }
 762
 763         bool const maintext = text.isMainText(buf);
 764
 765         // Open a CJK environment at the beginning of the main buffer
 766         // if the document's language is a CJK language
 767         if (maintext && bparams.encoding().package() == Encoding::CJK) {
 768                 os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
 769                 << "}{" << from_ascii(bparams.fontsCJK) << "}%\n";
 770                 texrow.newline();
 771                 open_encoding_ = CJK;
 772         }
 773         // if "auto begin" is switched off, explicitely switch the
 774         // language on at start
 775         if (maintext && !lyxrc.language_auto_begin &&
 776             !bparams.language->babel().empty()) {
 777                 // FIXME UNICODE
 778                 os << from_utf8(subst(lyxrc.language_command_begin,
 779                                         "$$lang",
 780                                         bparams.language->babel()))
 781                         << '\n';
 782         texrow.newline();
 783         }
 784
 785         ParagraphList::const_iterator lastpar;
 786         // if only_body
 787         while (par != endpar) {
 788                 lastpar = par;
 789                 Layout const & layout = par->forcePlainLayout() ?
 790                                 tclass.plainLayout() :
 791                                 par->layout();
 792
 793                 if (layout.intitle) {
 794                         if (already_title) {
 795                                 lyxerr << "Error in latexParagraphs: You"
 796                                         " should not mix title layouts"
 797                                         " with normal ones." << endl;
 798                         } else if (!was_title) {
 799                                 was_title = true;
 800                                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
 801                                         os << "\\begin{"
 802                                                         << from_ascii(tclass.titlename())
 803                                                         << "}\n";
 804                                         texrow.newline();
 805                                 }
 806                         }
 807                 } else if (was_title && !already_title) {
 808                         if (tclass.titletype() == TITLE_ENVIRONMENT) {
 809                                 os << "\\end{" << from_ascii(tclass.titlename())
 810                                                 << "}\n";
 811                         }
 812                         else {
 813                                 os << "\\" << from_ascii(tclass.titlename())
 814                                                 << "\n";
 815                         }
 816                         texrow.newline();
 817                         already_title = true;
 818                         was_title = false;
 819                 }
 820
 821                 if (layout.isEnvironment() ||
 822                                         !par->params().leftIndent().zero()) {
 823                         par = TeXEnvironment(buf, text, par, os,
 824                                                                 texrow, runparams);
 825                 } else {
 826                         par = TeXOnePar(buf, text, par, os, texrow,
 827                                         runparams, everypar);
 828                 }
 829                 if (distance(lastpar, par) >= distance(lastpar, endpar))
 830                         break;
 831         }
 832
 833         // It might be that we only have a title in this document
 834         if (was_title && !already_title) {
 835                 if (tclass.titletype() == TITLE_ENVIRONMENT) {
 836                         os << "\\end{" << from_ascii(tclass.titlename())
 837                             << "}\n";
 838                 }
 839                 else {
 840                         os << "\\" << from_ascii(tclass.titlename())
 841                             << "\n";
 842                                 }
 843                 texrow.newline();
 844         }
 845
 846         // if "auto end" is switched off, explicitely close the language at the end
 847         // but only if the last par is in a babel language
 848         if (maintext && !lyxrc.language_auto_end && !bparams.language->babel().empty() &&
 849                 lastpar->getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
 850                 os << from_utf8(subst(lyxrc.language_command_end,
 851                                         "$$lang",
 852                                         bparams.language->babel()))
 853                         << '\n';
 854                 texrow.newline();
 855         }
 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 (maintext && open_encoding_ == CJK) {
 860                 os << "\\end{CJK}\n";
 861                 texrow.newline();
 862                 open_encoding_ = none;
 863         }
 864
 865         // reset inherited encoding
 866         if (cjk_inherited_ > 0) {
 867                 cjk_inherited_ -= 1;
 868                 if (cjk_inherited_ == 0)
 869                         open_encoding_ = CJK;
 870         }
 871 }
 872
 873
 874 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
 875                    OutputParams const & runparams, Encoding const & newEnc,
 876                    bool force)
 877 {
 878         Encoding const & oldEnc = *runparams.encoding;
 879         bool moving_arg = runparams.moving_arg;
 880         if (!force && ((bparams.inputenc != "auto" && bparams.inputenc != "default")
 881                 || moving_arg))
 882                 return make_pair(false, 0);
 883
 884         // Do nothing if the encoding is unchanged.
 885         if (oldEnc.name() == newEnc.name())
 886                 return make_pair(false, 0);
 887
 888         // FIXME We ignore encoding switches from/to encodings that do
 889         // neither support the inputenc package nor the CJK package here.
 890         // This does of course only work in special cases (e.g. switch from
 891         // tis620-0 to latin1, but the text in latin1 contains ASCII only),
 892         // but it is the best we can do
 893         if (oldEnc.package() == Encoding::none
 894                 || newEnc.package() == Encoding::none)
 895                 return make_pair(false, 0);
 896
 897         LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
 898                 << oldEnc.name() << " to " << newEnc.name());
 899         os << setEncoding(newEnc.iconvName());
 900         if (bparams.inputenc == "default")
 901                 return make_pair(true, 0);
 902
 903         docstring const inputenc_arg(from_ascii(newEnc.latexName()));
 904         switch (newEnc.package()) {
 905                 case Encoding::none:
 906                 case Encoding::japanese:
 907                         // shouldn't ever reach here, see above
 908                         return make_pair(true, 0);
 909                 case Encoding::inputenc: {
 910                         int count = inputenc_arg.length();
 911                         if (oldEnc.package() == Encoding::CJK &&
 912                             open_encoding_ == CJK) {
 913                                 os << "\\end{CJK}";
 914                                 open_encoding_ = none;
 915                                 count += 9;
 916                         }
 917                         else if (oldEnc.package() == Encoding::inputenc &&
 918                                  open_encoding_ == inputenc) {
 919                                 os << "\\egroup";
 920                                 open_encoding_ = none;
 921                                 count += 7;
 922                         }
 923                         if (runparams.local_font != 0
 924                             && oldEnc.package() == Encoding::CJK) {
 925                                 // within insets, \inputenc switches need
 926                                 // to be embraced within \bgroup...\egroup;
 927                                 // else CJK fails.
 928                                 os << "\\bgroup";
 929                                 count += 7;
 930                                 open_encoding_ = inputenc;
 931                         }
 932                         // with the japanese option, inputenc is omitted.
 933                         if (runparams.use_japanese)
 934                                 return make_pair(true, count);
 935                         os << "\\inputencoding{" << inputenc_arg << '}';
 936                         return make_pair(true, count + 16);
 937                 }
 938                 case Encoding::CJK: {
 939                         int count = inputenc_arg.length();
 940                         if (oldEnc.package() == Encoding::CJK &&
 941                             open_encoding_ == CJK) {
 942                                 os << "\\end{CJK}";
 943                                 count += 9;
 944                         }
 945                         if (oldEnc.package() == Encoding::inputenc &&
 946                             open_encoding_ == inputenc) {
 947                                 os << "\\egroup";
 948                                 count += 7;
 949                         }
 950                         os << "\\begin{CJK}{" << inputenc_arg << "}{"
 951                            << from_ascii(bparams.fontsCJK) << "}";
 952                         open_encoding_ = CJK;
 953                         return make_pair(true, count + 15);
 954                 }
 955         }
 956         // Dead code to avoid a warning:
 957         return make_pair(true, 0);
 958
 959 }
 960
 961 } // namespace lyx