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.
6 * \author Lars Gullik Bjønnes
8 * Full author contact details are available in file CREDITS.
13 #include "output_latex.h"
16 #include "BufferParams.h"
18 #include "InsetList.h"
22 #include "OutputParams.h"
23 #include "Paragraph.h"
24 #include "paragraph_funcs.h"
25 #include "ParagraphParameters.h"
26 #include "TextClass.h"
30 #include "insets/InsetBibitem.h"
31 #include "insets/InsetOptArg.h"
33 #include "support/debug.h"
34 #include "support/lstrings.h"
36 #include <boost/next_prior.hpp>
39 using namespace lyx::support;
52 static int open_encoding_ = none;
53 static bool cjk_inherited_ = false;
56 ParagraphList::const_iterator
57 TeXEnvironment(Buffer const & buf,
59 ParagraphList::const_iterator pit,
60 odocstream & os, TexRow & texrow,
61 OutputParams const & runparams);
63 ParagraphList::const_iterator
64 TeXOnePar(Buffer const & buf,
66 ParagraphList::const_iterator pit,
67 odocstream & os, TexRow & texrow,
68 OutputParams const & runparams,
69 string const & everypar = string());
72 ParagraphList::const_iterator
73 TeXDeeper(Buffer const & buf,
75 ParagraphList::const_iterator pit,
76 odocstream & os, TexRow & texrow,
77 OutputParams const & runparams)
79 LYXERR(Debug::LATEX, "TeXDeeper... " << &*pit);
80 ParagraphList::const_iterator par = pit;
82 ParagraphList const & paragraphs = text.paragraphs();
84 while (par != paragraphs.end() &&
85 par->params().depth() == pit->params().depth()) {
86 if (par->layout().isEnvironment()) {
87 par = TeXEnvironment(buf, text, par,
88 os, texrow, runparams);
90 par = TeXOnePar(buf, text, par,
91 os, texrow, runparams);
94 LYXERR(Debug::LATEX, "TeXDeeper...done ");
100 ParagraphList::const_iterator
101 TeXEnvironment(Buffer const & buf,
103 ParagraphList::const_iterator pit,
104 odocstream & os, TexRow & texrow,
105 OutputParams const & runparams)
107 LYXERR(Debug::LATEX, "TeXEnvironment... " << &*pit);
109 BufferParams const & bparams = buf.params();
111 Layout const & style = pit->forceEmptyLayout() ?
112 bparams.documentClass().emptyLayout() : pit->layout();
114 ParagraphList const & paragraphs = text.paragraphs();
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)
122 if (par_language->babel() != prev_par_language->babel()) {
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,
130 prev_par_language->babel()))
131 // the '%' is necessary to prevent unwanted whitespace
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,
142 par_language->babel()))
143 // the '%' is necessary to prevent unwanted whitespace
149 bool leftindent_open = false;
150 if (!pit->params().leftIndent().zero()) {
151 os << "\\begin{LyXParagraphLeftIndent}{"
152 << from_ascii(pit->params().leftIndent().asLatexString())
155 leftindent_open = true;
158 if (style.isEnvironment()) {
159 os << "\\begin{" << from_ascii(style.latexname()) << '}';
160 if (style.optionalargs > 0) {
161 int ret = latexOptArgInsets(*pit, os, runparams,
168 if (style.latextype == LATEX_LIST_ENVIRONMENT) {
170 << pit->params().labelWidthString()
172 } else if (style.labeltype == LABEL_BIBLIO) {
174 os << '{' << bibitemWidest(buf) << "}\n";
176 os << from_ascii(style.latexparam()) << '\n';
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())
186 open_encoding_ = CJK;
191 ParagraphList::const_iterator par = pit;
193 par = TeXOnePar(buf, text, par, os, texrow, runparams);
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)
201 } else if (par->params().depth() > pit->params().depth()) {
202 if (par->layout().isParagraph()) {
204 // How to handle this? (Lgb)
205 //&& !suffixIs(os, "\n\n")
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.
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)
221 par = TeXDeeper(buf, text, par, os, texrow,
224 } while (par != paragraphs.end()
225 && par->layout() == pit->layout()
226 && par->params().depth() == pit->params().depth()
227 && par->params().leftIndent() == pit->params().leftIndent());
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";
234 open_encoding_ = none;
237 if (style.isEnvironment()) {
238 os << "\\end{" << from_ascii(style.latexname()) << "}\n";
242 if (leftindent_open) {
243 os << "\\end{LyXParagraphLeftIndent}\n";
247 if (par != paragraphs.end())
248 LYXERR(Debug::LATEX, "TeXEnvironment...done " << &*par);
256 int latexOptArgInsets(Paragraph const & par, odocstream & os,
257 OutputParams const & runparams, int number)
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) {
266 static_cast<InsetOptArg *>(it->inset);
267 lines += ins->latexOptional(os, runparams);
277 ParagraphList::const_iterator
278 TeXOnePar(Buffer const & buf,
280 ParagraphList::const_iterator pit,
281 odocstream & os, TexRow & texrow,
282 OutputParams const & runparams_in,
283 string const & everypar)
285 LYXERR(Debug::LATEX, "TeXOnePar... " << &*pit << " '"
287 BufferParams const & bparams = buf.params();
288 ParagraphList const & paragraphs = text.paragraphs();
290 if (runparams_in.verbatim) {
291 int const dist = distance(paragraphs.begin(), pit);
292 Font const outerfont = outerFont(dist, paragraphs);
294 // No newline if only one paragraph in this lyxtext
300 /*bool need_par = */ pit->latex(bparams, outerfont,
301 os, texrow, runparams_in);
306 // FIXME This comment doesn't make sense. What's the
307 // length got to do with forceEmptyLayout()? I.e., what
308 // was forceDefaultParagraphs()?
309 // In an inset with unlimited length (all in one row),
310 // force layout to default
311 Layout const style = pit->forceEmptyLayout() ?
312 bparams.documentClass().emptyLayout() : pit->layout();
314 OutputParams runparams = runparams_in;
315 runparams.moving_arg |= style.needprotect;
317 bool const maintext = text.isMainText(buf);
318 // we are at the beginning of an inset and CJK is already open.
319 if (pit == paragraphs.begin() && !maintext && open_encoding_ == CJK) {
320 cjk_inherited_ = true;
321 open_encoding_ = none;
324 // This paragraph's language
325 Language const * const par_language = pit->getParLanguage(bparams);
326 // The document's language
327 Language const * const doc_language = bparams.language;
328 // The language that was in effect when the environment this paragraph is
329 // inside of was opened
330 Language const * const outer_language =
331 (runparams.local_font != 0) ?
332 runparams.local_font->language() : doc_language;
333 // The previous language that was in effect is either the language of
334 // the previous paragraph, if there is one, or else the outer language
335 // if there is no previous paragraph
336 Language const * const prev_language =
337 (pit != paragraphs.begin()) ?
338 boost::prior(pit)->getParLanguage(bparams) : outer_language;
340 if (par_language->babel() != prev_language->babel()
341 // check if we already put language command in TeXEnvironment()
342 && !(style.isEnvironment()
343 && (pit == paragraphs.begin() ||
344 (boost::prior(pit)->layout() != pit->layout() &&
345 boost::prior(pit)->getDepth() <= pit->getDepth())
346 || boost::prior(pit)->getDepth() < pit->getDepth())))
348 if (!lyxrc.language_command_end.empty() &&
349 prev_language->babel() != outer_language->babel() &&
350 !prev_language->babel().empty())
352 os << from_ascii(subst(lyxrc.language_command_end,
354 prev_language->babel()))
355 // the '%' is necessary to prevent unwanted whitespace
360 // We need to open a new language if we couldn't close the previous
361 // one (because there's no language_command_end); and even if we closed
362 // the previous one, if the current language is different than the
363 // outer_language (which is currently in effect once the previous one
365 if ((lyxrc.language_command_end.empty() ||
366 par_language->babel() != outer_language->babel()) &&
367 !par_language->babel().empty()) {
368 // If we're inside an inset, and that inset is within an \L or \R
369 // (or equivalents), then within the inset, too, any opposite
370 // language paragraph should appear within an \L or \R (in addition
371 // to, outside of, the normal language switch commands).
372 // This behavior is not correct for ArabTeX, though.
373 if ( // not for ArabTeX
374 (par_language->lang() != "arabic_arabtex" &&
375 outer_language->lang() != "arabic_arabtex") &&
376 // are we in an inset?
377 runparams.local_font != 0 &&
378 // is the inset within an \L or \R?
380 // FIXME: currently, we don't check this; this means that
381 // we'll have unnnecessary \L and \R commands, but that
382 // doesn't seem to hurt (though latex will complain)
384 // is this paragraph in the opposite direction?
385 runparams.local_font->isRightToLeft() !=
386 par_language->rightToLeft()
388 // FIXME: I don't have a working copy of the Arabi package, so
389 // I'm not sure if the farsi and arabic_arabi stuff is correct
391 if (par_language->lang() == "farsi")
393 else if (outer_language->lang() == "farsi")
395 else if (par_language->lang() == "arabic_arabi")
397 else if (outer_language->lang() == "arabic_arabi")
399 // remaining RTL languages currently is hebrew
400 else if (par_language->rightToLeft())
405 // With CJK, the CJK tag has to be closed first (see below)
406 if (runparams.encoding->package() != Encoding::CJK) {
407 os << from_ascii(subst(
408 lyxrc.language_command_begin,
410 par_language->babel()))
411 // the '%' is necessary to prevent unwanted whitespace
418 // Switch file encoding if necessary; no need to do this for "default"
419 // encoding, since this only affects the position of the outputted
420 // \inputencoding command; the encoding switch will occur when necessary
421 if (bparams.inputenc == "auto" &&
422 runparams.encoding->package() != Encoding::none) {
423 // Look ahead for future encoding changes.
424 // We try to output them at the beginning of the paragraph,
425 // since the \inputencoding command is not allowed e.g. in
427 for (pos_type i = 0; i < pit->size(); ++i) {
428 char_type const c = pit->getChar(i);
429 Encoding const * const encoding =
430 pit->getFontSettings(bparams, i).language()->encoding();
431 if (encoding->package() != Encoding::CJK &&
432 runparams.encoding->package() == Encoding::inputenc &&
437 // All characters before c are in the ASCII range, and
438 // c is non-ASCII (but no inset), so change the
439 // encoding to that required by the language of c.
440 // With CJK, only add switch if we have CJK content at the beginning
442 if (encoding->package() != Encoding::CJK || i == 0) {
443 OutputParams tmp_rp = runparams;
444 runparams.moving_arg = false;
445 pair<bool, int> enc_switch = switchEncoding(os, bparams, runparams,
448 // the following is necessary after a CJK environment in a multilingual
449 // context (nesting issue).
450 if (par_language->encoding()->package() == Encoding::CJK &&
451 open_encoding_ != CJK && !cjk_inherited_) {
452 os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
454 open_encoding_ = CJK;
457 if (encoding->package() != Encoding::none && enc_switch.first) {
458 if (enc_switch.second > 0) {
459 // the '%' is necessary to prevent unwanted whitespace
463 // With CJK, the CJK tag had to be closed first (see above)
464 if (runparams.encoding->package() == Encoding::CJK) {
465 os << from_ascii(subst(
466 lyxrc.language_command_begin,
468 par_language->babel()))
469 // the '%' is necessary to prevent unwanted whitespace
473 runparams.encoding = encoding;
480 bool const useSetSpace = bparams.documentClass().provides("SetSpace");
481 if (pit->allowParagraphCustomization()) {
482 if (pit->params().startOfAppendix()) {
483 os << "\\appendix\n";
487 if (!pit->params().spacing().isDefault()
488 && (pit == paragraphs.begin()
489 || !boost::prior(pit)->hasSameLayout(*pit)))
491 os << from_ascii(pit->params().spacing().writeEnvirBegin(useSetSpace))
496 if (style.isCommand()) {
502 switch (style.latextype) {
504 os << '\\' << from_ascii(style.latexname());
506 // Separate handling of optional argument inset.
507 if (style.optionalargs > 0) {
508 int ret = latexOptArgInsets(*pit, os, runparams,
516 os << from_ascii(style.latexparam());
518 case LATEX_ITEM_ENVIRONMENT:
519 case LATEX_LIST_ENVIRONMENT:
522 case LATEX_BIB_ENVIRONMENT:
523 // ignore this, the inset will write itself
529 Font const outerfont = outerFont(distance(paragraphs.begin(), pit),
533 os << from_utf8(everypar);
534 bool need_par = pit->latex(bparams, outerfont,
535 os, texrow, runparams);
537 // Make sure that \\par is done with the font of the last
538 // character if this has another size as the default.
539 // This is necessary because LaTeX (and LyX on the screen)
540 // calculates the space between the baselines according
541 // to this font. (Matthias)
543 // Is this really needed ? (Dekel)
544 // We do not need to use to change the font for the last paragraph
547 Font const font = pit->empty()
548 ? pit->getLayoutFont(bparams, outerfont)
549 : pit->getFont(bparams, pit->size() - 1, outerfont);
551 bool is_command = style.isCommand();
553 if (style.resfont.size() != font.fontInfo().size()
554 && boost::next(pit) != paragraphs.end()
558 os << "\\" << from_ascii(font.latexSize()) << " \\par}";
559 } else if (need_par) {
561 } else if (is_command)
564 bool pending_newline = false;
565 switch (style.latextype) {
566 case LATEX_ITEM_ENVIRONMENT:
567 case LATEX_LIST_ENVIRONMENT:
568 if (boost::next(pit) != paragraphs.end()
569 && (pit->params().depth() < boost::next(pit)->params().depth()))
570 pending_newline = true;
572 case LATEX_ENVIRONMENT: {
573 // if its the last paragraph of the current environment
574 // skip it otherwise fall through
575 ParagraphList::const_iterator next = boost::next(pit);
577 if (next != paragraphs.end() && (next->layout() != pit->layout()
578 || next->params().depth() != pit->params().depth()))
582 // fall through possible
584 // we don't need it for the last paragraph!!!
585 if (boost::next(pit) != paragraphs.end())
586 pending_newline = true;
589 if (pit->allowParagraphCustomization()) {
590 if (!pit->params().spacing().isDefault()
591 && (boost::next(pit) == paragraphs.end()
592 || !boost::next(pit)->hasSameLayout(*pit)))
594 if (pending_newline) {
598 os << from_ascii(pit->params().spacing().writeEnvirEnd(useSetSpace));
599 pending_newline = true;
603 // Closing the language is needed for the last paragraph; it is also
604 // needed if we're within an \L or \R that we may have opened above (not
605 // necessarily in this paragraph) and are about to close.
606 bool closing_rtl_ltr_environment =
608 (par_language->lang() != "arabic_arabtex" &&
609 outer_language->lang() != "arabic_arabtex") &&
610 // have we opened and \L or \R environment?
611 runparams.local_font != 0 &&
612 runparams.local_font->isRightToLeft() != par_language->rightToLeft() &&
613 // are we about to close the language?
614 ((boost::next(pit) != paragraphs.end() &&
615 par_language->babel() !=
616 (boost::next(pit)->getParLanguage(bparams))->babel()) ||
617 (boost::next(pit) == paragraphs.end() &&
618 par_language->babel() != outer_language->babel()));
620 if (closing_rtl_ltr_environment || (boost::next(pit) == paragraphs.end()
621 && par_language->babel() != outer_language->babel())) {
622 // Since \selectlanguage write the language to the aux file,
623 // we need to reset the language at the end of footnote or
626 if (pending_newline) {
630 // when the paragraph uses CJK, the language has to be closed earlier
631 if (font.language()->encoding()->package() != Encoding::CJK) {
632 if (lyxrc.language_command_end.empty()) {
633 if (!prev_language->babel().empty()) {
634 os << from_ascii(subst(
635 lyxrc.language_command_begin,
637 prev_language->babel()));
638 pending_newline = true;
640 } else if (!par_language->babel().empty()) {
641 os << from_ascii(subst(
642 lyxrc.language_command_end,
644 par_language->babel()));
645 pending_newline = true;
649 if (closing_rtl_ltr_environment)
652 if (pending_newline) {
657 // if this is a CJK-paragraph and the next isn't, close CJK
658 // also if the next paragraph is a multilingual environment (because of nesting)
659 if (boost::next(pit) != paragraphs.end() && open_encoding_ == CJK &&
660 (boost::next(pit)->getParLanguage(bparams)->encoding()->package() != Encoding::CJK ||
661 boost::next(pit)->layout().isEnvironment() && boost::next(pit)->isMultiLingual(bparams))
662 // in environments, CJK has to be closed later (nesting!)
663 && !style.isEnvironment()) {
664 os << "\\end{CJK}\n";
665 open_encoding_ = none;
668 // If this is the last paragraph, close the CJK environment
669 // if necessary. If it's an environment, we'll have to \end that first.
670 if (boost::next(pit) == paragraphs.end() && !style.isEnvironment()) {
671 switch (open_encoding_) {
677 os << "\\end{CJK}\n";
682 open_encoding_ = none;
687 open_encoding_ = none;
697 // If this is the last paragraph, and a local_font was set upon entering
698 // the inset, the encoding should be set back to that local_font's
699 // encoding. We don't use switchEncoding(), because no explicit encoding
700 // switch command is needed, since latex will automatically revert to it
701 // when this inset closes.
702 // This switch is only necessary if we're using "auto" or "default"
704 if (boost::next(pit) == paragraphs.end() && runparams_in.local_font != 0) {
705 runparams_in.encoding = runparams_in.local_font->language()->encoding();
706 if (bparams.inputenc == "auto" || bparams.inputenc == "default")
707 os << setEncoding(runparams_in.encoding->iconvName());
710 // Otherwise, the current encoding should be set for the next paragraph.
712 runparams_in.encoding = runparams.encoding;
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 (boost::next(pit) != paragraphs.end()) {
723 if (boost::next(pit) != paragraphs.end())
724 LYXERR(Debug::LATEX, "TeXOnePar...done " << &*boost::next(pit));
732 // LaTeX all paragraphs
733 void latexParagraphs(Buffer const & buf,
737 OutputParams const & runparams,
738 string const & everypar)
740 bool was_title = false;
741 bool already_title = false;
742 BufferParams const & bparams = buf.params();
743 DocumentClass const & tclass = bparams.documentClass();
744 ParagraphList const & paragraphs = text.paragraphs();
745 ParagraphList::const_iterator par = paragraphs.begin();
746 ParagraphList::const_iterator endpar = paragraphs.end();
748 BOOST_ASSERT(runparams.par_begin <= runparams.par_end);
749 // if only part of the paragraphs will be outputed
750 if (runparams.par_begin != runparams.par_end) {
751 par = boost::next(paragraphs.begin(), runparams.par_begin);
752 endpar = boost::next(paragraphs.begin(), runparams.par_end);
753 // runparams will be passed to nested paragraphs, so
754 // we have to reset the range parameters.
755 const_cast<OutputParams&>(runparams).par_begin = 0;
756 const_cast<OutputParams&>(runparams).par_end = 0;
759 bool const maintext = text.isMainText(buf);
761 // Open a CJK environment at the beginning of the main buffer
762 // if the document's language is a CJK language
763 if (maintext && bparams.encoding().package() == Encoding::CJK) {
764 os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
767 open_encoding_ = CJK;
769 // if "auto begin" is switched off, explicitely switch the
770 // language on at start
771 if (maintext && !lyxrc.language_auto_begin &&
772 !bparams.language->babel().empty()) {
774 os << from_utf8(subst(lyxrc.language_command_begin,
776 bparams.language->babel()))
781 ParagraphList::const_iterator lastpar;
783 while (par != endpar) {
785 // well we have to check if we are in an inset with unlimited
786 // length (all in one row) if that is true then we don't allow
787 // any special options in the paragraph and also we don't allow
788 // any environment other than the default layout of the
789 // text class to be valid!
790 if (par->allowParagraphCustomization()) {
791 Layout const & layout = par->forceEmptyLayout() ?
792 tclass.emptyLayout() :
795 if (layout.intitle) {
797 lyxerr << "Error in latexParagraphs: You"
798 " should not mix title layouts"
799 " with normal ones." << endl;
800 } else if (!was_title) {
802 if (tclass.titletype() == TITLE_ENVIRONMENT) {
804 << from_ascii(tclass.titlename())
809 } else if (was_title && !already_title) {
810 if (tclass.titletype() == TITLE_ENVIRONMENT) {
811 os << "\\end{" << from_ascii(tclass.titlename())
815 os << "\\" << from_ascii(tclass.titlename())
819 already_title = true;
823 if (layout.is_environment) {
824 par = TeXOnePar(buf, text, par, os, texrow,
825 runparams, everypar);
826 } else if (layout.isEnvironment() ||
827 !par->params().leftIndent().zero()) {
828 par = TeXEnvironment(buf, text, par, os,
831 par = TeXOnePar(buf, text, par, os, texrow,
832 runparams, everypar);
835 par = TeXOnePar(buf, text, par, os, texrow,
836 runparams, everypar);
838 if (distance(lastpar, par) >= distance(lastpar, endpar))
841 // It might be that we only have a title in this document
842 if (was_title && !already_title) {
843 if (tclass.titletype() == TITLE_ENVIRONMENT) {
844 os << "\\end{" << from_ascii(tclass.titlename())
848 os << "\\" << from_ascii(tclass.titlename())
853 // if "auto end" is switched off, explicitely close the language at the end
854 // but only if the last par is in a babel language
855 if (maintext && !lyxrc.language_auto_end && !bparams.language->babel().empty() &&
856 lastpar->getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
857 os << from_utf8(subst(lyxrc.language_command_end,
859 bparams.language->babel()))
863 // If the last paragraph is an environment, we'll have to close
864 // CJK at the very end to do proper nesting.
865 if (maintext && open_encoding_ == CJK) {
866 os << "\\end{CJK}\n";
868 open_encoding_ = none;
870 // reset inherited encoding
871 if (cjk_inherited_) {
872 open_encoding_ = CJK;
873 cjk_inherited_ = false;
878 pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
879 OutputParams const & runparams, Encoding const & newEnc)
881 Encoding const oldEnc = *runparams.encoding;
882 bool moving_arg = runparams.moving_arg;
883 if ((bparams.inputenc != "auto" && bparams.inputenc != "default")
885 return make_pair(false, 0);
887 // Do nothing if the encoding is unchanged.
888 if (oldEnc.name() == newEnc.name())
889 return make_pair(false, 0);
891 // FIXME We ignore encoding switches from/to encodings that do
892 // neither support the inputenc package nor the CJK package here.
893 // This does of course only work in special cases (e.g. switch from
894 // tis620-0 to latin1, but the text in latin1 contains ASCII only),
895 // but it is the best we can do
896 if (oldEnc.package() == Encoding::none
897 || newEnc.package() == Encoding::none)
898 return make_pair(false, 0);
900 LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
901 << oldEnc.name() << " to " << newEnc.name());
902 os << setEncoding(newEnc.iconvName());
903 if (bparams.inputenc == "default")
904 return make_pair(true, 0);
906 docstring const inputenc_arg(from_ascii(newEnc.latexName()));
907 switch (newEnc.package()) {
909 // shouldn't ever reach here, see above
910 return make_pair(true, 0);
911 case Encoding::inputenc: {
912 int count = inputenc_arg.length();
913 if (oldEnc.package() == Encoding::CJK &&
914 open_encoding_ == CJK) {
916 open_encoding_ = none;
919 else if (oldEnc.package() == Encoding::inputenc &&
920 open_encoding_ == inputenc) {
922 open_encoding_ = none;
925 if (runparams.local_font != 0 && oldEnc.package() == Encoding::CJK) {
926 // within insets, \inputenc switches need to be
927 // embraced within \bgroup ... \egroup; else CJK fails.
930 open_encoding_ = inputenc;
932 os << "\\inputencoding{" << inputenc_arg << '}';
933 return make_pair(true, count + 16);
935 case Encoding::CJK: {
936 int count = inputenc_arg.length();
937 if (oldEnc.package() == Encoding::CJK &&
938 open_encoding_ == CJK) {
942 if (oldEnc.package() == Encoding::inputenc &&
943 open_encoding_ == inputenc) {
947 os << "\\begin{CJK}{" << inputenc_arg << "}{}";
948 open_encoding_ = CJK;
949 return make_pair(true, count + 15);
952 // Dead code to avoid a warning:
953 return make_pair(true, 0);