2 * \file LaTeXFeatures.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
7 * \author Lars Gullik Bjønnes
8 * \author Jean-Marc Lasgouttes
10 * \author André Pönitz
12 * Full author contact details are available in file CREDITS.
17 #include "LaTeXFeatures.h"
20 #include "BufferParams.h"
22 #include "Converter.h"
25 #include "FloatList.h"
27 #include "LaTeXPackages.h"
31 #include "TextClass.h"
33 #include "insets/InsetLayout.h"
35 #include "support/debug.h"
36 #include "support/docstream.h"
37 #include "support/FileName.h"
38 #include "support/filetools.h"
39 #include "support/gettext.h"
40 #include "support/lstrings.h"
41 #include "support/regex.h"
47 using namespace lyx::support;
52 /////////////////////////////////////////////////////////////////////
56 /////////////////////////////////////////////////////////////////////
58 //\NeedsTeXFormat{LaTeX2e}
59 //\ProvidesPackage{lyx}[1996/01/11 LLE v0.2 (LyX LaTeX Extensions)]
60 //\message{LyX LaTeX Extensions (LLE v0.2) of 11-Jan-1996.}
62 static docstring const lyx_def = from_ascii(
63 "\\providecommand{\\LyX}{L\\kern-.1667em\\lower.25em\\hbox{Y}\\kern-.125emX\\@}");
65 static docstring const lyx_hyperref_def = from_ascii(
66 "\\providecommand{\\LyX}{\\texorpdfstring%\n"
67 " {L\\kern-.1667em\\lower.25em\\hbox{Y}\\kern-.125emX\\@}\n"
70 static docstring const noun_def = from_ascii(
71 "\\newcommand{\\noun}[1]{\\textsc{#1}}");
73 static docstring const lyxarrow_def = from_ascii(
74 "\\DeclareRobustCommand*{\\lyxarrow}{%\n"
76 "{\\leavevmode\\,$\\triangleleft$\\,\\allowbreak}\n"
77 "{\\leavevmode\\,$\\triangleright$\\,\\allowbreak}}");
79 // for quotes without babel. This does not give perfect results, but
80 // anybody serious about non-english quotes should use babel (JMarc).
82 static docstring const quotedblbase_def = from_ascii(
83 "\\ProvideTextCommandDefault{\\quotedblbase}{%\n"
84 " \\raisebox{-1.4ex}[1ex][.5ex]{\\textquotedblright}%\n"
85 " \\penalty10000\\hskip0em\\relax%\n"
88 static docstring const quotesinglbase_def = from_ascii(
89 "\\ProvideTextCommandDefault{\\quotesinglbase}{%\n"
90 " \\raisebox{-1.4ex}[1ex][.5ex]{\\textquoteright}%\n"
91 " \\penalty10000\\hskip0em\\relax%\n"
94 static docstring const guillemotleft_def = from_ascii(
95 "\\ProvideTextCommandDefault{\\guillemotleft}{%\n"
96 " {\\usefont{U}{lasy}{m}{n}\\char'50\\kern-.15em\\char'50}%\n"
97 "\\penalty10000\\hskip0pt\\relax%\n"
100 static docstring const guillemotright_def = from_ascii(
101 "\\ProvideTextCommandDefault{\\guillemotright}{%\n"
102 " \\penalty10000\\hskip0pt%\n"
103 " {\\usefont{U}{lasy}{m}{n}\\char'51\\kern-.15em\\char'51}%\n"
106 static docstring const guilsinglleft_def = from_ascii(
107 "\\ProvideTextCommandDefault{\\guilsinglleft}{%\n"
108 " {\\usefont{U}{lasy}{m}{n}\\char'50}%\n"
109 " \\penalty10000\\hskip0pt\\relax%\n"
112 static docstring const guilsinglright_def = from_ascii(
113 "\\ProvideTextCommandDefault{\\guilsinglright}{%\n"
114 " \\penalty10000\\hskip0pt%\n"
115 " {\\usefont{U}{lasy}{m}{n}\\char'51}%\n"
118 static docstring const paragraphleftindent_def = from_ascii(
119 "\\newenvironment{LyXParagraphLeftIndent}[1]%\n"
121 " \\begin{list}{}{%\n"
122 " \\setlength{\\topsep}{0pt}%\n"
123 " \\addtolength{\\leftmargin}{#1}\n"
124 // ho hum, yet more things commented out with no hint as to why they
125 // weren't just removed
126 // "%% \\addtolength{\\leftmargin}{#1\\textwidth}\n"
127 // "%% \\setlength{\\textwidth}{#2\\textwidth}\n"
128 // "%% \\setlength\\listparindent\\parindent%\n"
129 // "%% \\setlength\\itemindent\\parindent%\n"
130 " \\setlength{\\parsep}{0pt plus 1pt}%\n"
136 static docstring const floatingfootnote_def = from_ascii(
137 "%% Special footnote code from the package 'stblftnt.sty'\n"
138 "%% Author: Robin Fairbairns -- Last revised Dec 13 1996\n"
139 "\\let\\SF@@footnote\\footnote\n"
140 "\\def\\footnote{\\ifx\\protect\\@typeset@protect\n"
141 " \\expandafter\\SF@@footnote\n"
143 " \\expandafter\\SF@gobble@opt\n"
146 "\\expandafter\\def\\csname SF@gobble@opt \\endcsname{\\@ifnextchar[%]\n"
147 " \\SF@gobble@twobracket\n"
150 "\\edef\\SF@gobble@opt{\\noexpand\\protect\n"
151 " \\expandafter\\noexpand\\csname SF@gobble@opt \\endcsname}\n"
152 "\\def\\SF@gobble@twobracket[#1]#2{}\n");
154 static docstring const binom_def = from_ascii(
155 "%% Binom macro for standard LaTeX users\n"
156 "\\newcommand{\\binom}[2]{{#1 \\choose #2}}\n");
158 static docstring const mathcircumflex_def = from_ascii(
159 "%% For printing a cirumflex inside a formula\n"
160 "\\newcommand{\\mathcircumflex}[0]{\\mbox{\\^{}}}\n");
162 static docstring const tabularnewline_def = from_ascii(
163 "%% Because html converters don't know tabularnewline\n"
164 "\\providecommand{\\tabularnewline}{\\\\}\n");
166 static docstring const lyxgreyedout_def = from_ascii(
167 "%% The greyedout annotation environment\n"
168 "\\newenvironment{lyxgreyedout}\n"
169 " {\\textcolor{note_fontcolor}\\bgroup\\ignorespaces}\n"
170 " {\\ignorespacesafterend\\egroup}\n");
172 // We want to omit the file extension for includegraphics, but this does not
173 // work when the filename contains other dots.
174 // Idea from http://www.tex.ac.uk/cgi-bin/texfaq2html?label=unkgrfextn
175 static docstring const lyxdot_def = from_ascii(
176 "%% A simple dot to overcome graphicx limitations\n"
177 "\\newcommand{\\lyxdot}{.}\n");
179 static docstring const changetracking_dvipost_def = from_ascii(
180 "%% Change tracking with dvipost\n"
182 "\\dvipost{osstart color push Red}\n"
183 "\\dvipost{osend color pop}\n"
184 "\\dvipost{cbstart color push Blue}\n"
185 "\\dvipost{cbend color pop}\n"
186 "\\newcommand{\\lyxadded}[3]{\\changestart#3\\changeend}\n"
187 "\\newcommand{\\lyxdeleted}[3]{%\n"
188 "\\changestart\\overstrikeon#3\\overstrikeoff\\changeend}\n");
190 static docstring const changetracking_xcolor_ulem_def = from_ascii(
191 "%% Change tracking with ulem\n"
192 "\\newcommand{\\lyxadded}[3]{{\\color{lyxadded}{}#3}}\n"
193 "\\newcommand{\\lyxdeleted}[3]{{\\color{lyxdeleted}\\sout{#3}}}\n");
195 static docstring const changetracking_xcolor_ulem_hyperref_def = from_ascii(
196 "%% Change tracking with ulem\n"
197 "\\newcommand{\\lyxadded}[3]{{\\texorpdfstring{\\color{lyxadded}{}}{}#3}}\n"
198 "\\newcommand{\\lyxdeleted}[3]{{\\texorpdfstring{\\color{lyxdeleted}\\sout{#3}}{}}}\n");
200 static docstring const changetracking_none_def = from_ascii(
201 "\\newcommand{\\lyxadded}[3]{#3}\n"
202 "\\newcommand{\\lyxdeleted}[3]{}\n");
204 static docstring const textgreek_def = from_ascii(
205 "\\DeclareRobustCommand{\\greektext}{%\n"
206 " \\fontencoding{LGR}\\selectfont\\def\\encodingdefault{LGR}}\n"
207 "\\DeclareRobustCommand{\\textgreek}[1]{\\leavevmode{\\greektext #1}}\n"
208 "\\DeclareFontEncoding{LGR}{}{}\n"
209 "\\DeclareTextSymbol{\\~}{LGR}{126}");
211 static docstring const textcyr_def = from_ascii(
212 "\\DeclareRobustCommand{\\cyrtext}{%\n"
213 " \\fontencoding{T2A}\\selectfont\\def\\encodingdefault{T2A}}\n"
214 "\\DeclareRobustCommand{\\textcyr}[1]{\\leavevmode{\\cyrtext #1}}\n"
215 "\\AtBeginDocument{\\DeclareFontEncoding{T2A}{}{}}\n");
217 static docstring const lyxmathsym_def = from_ascii(
218 "\\newcommand{\\lyxmathsym}[1]{\\ifmmode\\begingroup\\def\\b@ld{bold}\n"
219 " \\text{\\ifx\\math@version\\b@ld\\bfseries\\fi#1}\\endgroup\\else#1\\fi}\n");
221 static docstring const papersizedvi_def = from_ascii(
222 "\\special{papersize=\\the\\paperwidth,\\the\\paperheight}\n");
224 static docstring const papersizepdf_def = from_ascii(
225 "\\pdfpageheight\\paperheight\n"
226 "\\pdfpagewidth\\paperwidth\n");
228 static docstring const cedilla_def = from_ascii(
229 "\\newcommand{\\docedilla}[2]{\\underaccent{#1\\mathchar'30}{#2}}\n"
230 "\\newcommand{\\cedilla}[1]{\\mathpalette\\docedilla{#1}}\n");
232 static docstring const subring_def = from_ascii(
233 "\\newcommand{\\dosubring}[2]{\\underaccent{#1\\mathchar'27}{#2}}\n"
234 "\\newcommand{\\subring}[1]{\\mathpalette\\dosubring{#1}}\n");
236 static docstring const subdot_def = from_ascii(
237 "\\newcommand{\\dosubdot}[2]{\\underaccent{#1.}{#2}}\n"
238 "\\newcommand{\\subdot}[1]{\\mathpalette\\dosubdot{#1}}\n");
240 static docstring const subhat_def = from_ascii(
241 "\\newcommand{\\dosubhat}[2]{\\underaccent{#1\\mathchar'136}{#2}}\n"
242 "\\newcommand{\\subhat}[1]{\\mathpalette\\dosubhat{#1}}\n");
244 static docstring const subtilde_def = from_ascii(
245 "\\newcommand{\\dosubtilde}[2]{\\underaccent{#1\\mathchar'176}{#2}}\n"
246 "\\newcommand{\\subtilde}[1]{\\mathpalette\\dosubtilde{#1}}\n");
248 static docstring const dacute_def = from_ascii(
249 "\\DeclareMathAccent{\\dacute}{\\mathalpha}{operators}{'175}\n");
251 static docstring const tipasymb_def = from_ascii(
252 "\\DeclareFontEncoding{T3}{}{}\n"
253 "\\DeclareSymbolFont{tipasymb}{T3}{cmr}{m}{n}\n");
255 static docstring const dgrave_def = from_ascii(
256 "\\DeclareMathAccent{\\dgrave}{\\mathord}{tipasymb}{'15}\n");
258 static docstring const rcap_def = from_ascii(
259 "\\DeclareMathAccent{\\rcap}{\\mathord}{tipasymb}{'20}\n");
261 static docstring const ogonek_def = from_ascii(
262 "\\newcommand{\\doogonek}[2]{\\setbox0=\\hbox{$#1#2$}\\underaccent{#1\\mkern-6mu\n"
263 " \\ifx#2O\\hskip0.5\\wd0\\else\\ifx#2U\\hskip0.5\\wd0\\else\\hskip\\wd0\\fi\\fi\n"
264 " \\ifx#2o\\mkern-2mu\\else\\ifx#2e\\mkern-1mu\\fi\\fi\n"
265 " \\mathchar\"0\\hexnumber@\\symtipasymb0C}{#2}}\n"
266 "\\newcommand{\\ogonek}[1]{\\mathpalette\\doogonek{#1}}\n");
268 static docstring const lyxref_def = from_ascii(
269 "\\RS@ifundefined{subref}\n"
270 " {\\def\\RSsubtxt{section~}\\newref{sub}{name = \\RSsubtxt}}\n"
272 "\\RS@ifundefined{thmref}\n"
273 " {\\def\\RSthmtxt{theorem~}\\newref{thm}{name = \\RSthmtxt}}\n"
275 "\\RS@ifundefined{lemref}\n"
276 " {\\def\\RSlemtxt{lemma~}\\newref{lem}{name = \\RSlemtxt}}\n"
280 /////////////////////////////////////////////////////////////////////
284 /////////////////////////////////////////////////////////////////////
287 LaTeXFeatures::LaTeXFeatures(Buffer const & b, BufferParams const & p,
288 OutputParams const & r)
289 : buffer_(&b), params_(p), runparams_(r), in_float_(false)
293 bool LaTeXFeatures::useBabel() const
295 if (usePolyglossia())
297 if (bufferParams().lang_package == "default")
298 return (lyxrc.language_package_selection != LyXRC::LP_NONE)
299 || (bufferParams().language->lang() != lyxrc.default_language
300 && !bufferParams().language->babel().empty())
301 || this->hasLanguages();
302 return (bufferParams().lang_package != "none")
303 || (bufferParams().language->lang() != lyxrc.default_language
304 && !bufferParams().language->babel().empty())
305 || this->hasLanguages();
309 bool LaTeXFeatures::usePolyglossia() const
311 if (bufferParams().lang_package == "default")
312 return (lyxrc.language_package_selection == LyXRC::LP_AUTO)
313 && isRequired("polyglossia")
314 && isAvailable("polyglossia")
315 && !params_.documentClass().provides("babel")
316 && this->hasPolyglossiaLanguages();
317 return (bufferParams().lang_package == "auto")
318 && isRequired("polyglossia")
319 && isAvailable("polyglossia")
320 && !params_.documentClass().provides("babel")
321 && this->hasPolyglossiaLanguages();
325 void LaTeXFeatures::require(string const & name)
327 features_.insert(name);
331 void LaTeXFeatures::require(set<string> const & names)
333 features_.insert(names.begin(), names.end());
337 void LaTeXFeatures::useLayout(docstring const & layoutname)
339 // Some code to avoid loops in dependency definition
340 static int level = 0;
341 const int maxlevel = 30;
342 if (level > maxlevel) {
343 lyxerr << "LaTeXFeatures::useLayout: maximum level of "
344 << "recursion attained by layout "
345 << to_utf8(layoutname) << endl;
349 DocumentClass const & tclass = params_.documentClass();
350 if (tclass.hasLayout(layoutname)) {
351 // Is this layout already in usedLayouts?
352 if (find(usedLayouts_.begin(), usedLayouts_.end(), layoutname)
353 != usedLayouts_.end())
356 Layout const & layout = tclass[layoutname];
357 require(layout.requires());
359 if (!layout.depends_on().empty()) {
361 useLayout(layout.depends_on());
364 usedLayouts_.push_back(layoutname);
366 lyxerr << "LaTeXFeatures::useLayout: layout `"
367 << to_utf8(layoutname) << "' does not exist in this class"
375 void LaTeXFeatures::useInsetLayout(InsetLayout const & lay)
377 docstring const & lname = lay.name();
378 DocumentClass const & tclass = params_.documentClass();
380 // this is a default inset layout, nothing useful here
381 if (!tclass.hasInsetLayout(lname))
383 // Is this layout already in usedInsetLayouts?
384 if (find(usedInsetLayouts_.begin(), usedInsetLayouts_.end(), lname)
385 != usedInsetLayouts_.end())
388 require(lay.requires());
389 usedInsetLayouts_.push_back(lname);
393 bool LaTeXFeatures::isRequired(string const & name) const
395 return features_.find(name) != features_.end();
399 bool LaTeXFeatures::mustProvide(string const & name) const
401 return isRequired(name) && !params_.documentClass().provides(name);
405 bool LaTeXFeatures::isAvailable(string const & name)
407 string::size_type const i = name.find("->");
408 if (i != string::npos) {
409 string const from = name.substr(0,i);
410 string const to = name.substr(i+2);
411 //LYXERR0("from=[" << from << "] to=[" << to << "]");
412 return theConverters().isReachable(from, to);
414 return LaTeXPackages::isAvailable(name);
418 void LaTeXFeatures::addPreambleSnippet(string const & preamble)
420 SnippetList::const_iterator begin = preamble_snippets_.begin();
421 SnippetList::const_iterator end = preamble_snippets_.end();
422 if (find(begin, end, preamble) == end)
423 preamble_snippets_.push_back(preamble);
427 void LaTeXFeatures::addCSSSnippet(std::string const & snippet)
429 SnippetList::const_iterator begin = css_snippets_.begin();
430 SnippetList::const_iterator end = css_snippets_.end();
431 if (find(begin, end, snippet) == end)
432 css_snippets_.push_back(snippet);
436 void LaTeXFeatures::useFloat(string const & name, bool subfloat)
438 if (!usedFloats_[name])
439 usedFloats_[name] = subfloat;
442 // We only need float.sty if we use non builtin floats, or if we
443 // use the "H" modifier. This includes modified table and
444 // figure floats. (Lgb)
445 Floating const & fl = params_.documentClass().floats().getType(name);
446 if (!fl.floattype().empty() && fl.usesFloatPkg()) {
452 void LaTeXFeatures::useLanguage(Language const * lang)
454 if (!lang->babel().empty())
455 UsedLanguages_.insert(lang);
456 if (lang->lang() == "vietnamese")
457 require("vietnamese");
458 // CJK languages do not have a babel name.
459 // They use the CJK package
460 if (lang->encoding()->package() == Encoding::CJK)
462 // japanese package is special
463 if (lang->encoding()->package() == Encoding::japanese)
468 void LaTeXFeatures::includeFile(docstring const & key, string const & name)
470 IncludedFiles_[key] = name;
474 bool LaTeXFeatures::hasLanguages() const
476 return !UsedLanguages_.empty();
480 bool LaTeXFeatures::hasPolyglossiaLanguages() const
482 LanguageList::const_iterator const begin = UsedLanguages_.begin();
483 for (LanguageList::const_iterator cit = begin;
484 cit != UsedLanguages_.end();
486 if ((*cit)->polyglossia().empty())
493 string LaTeXFeatures::getLanguages() const
495 ostringstream languages;
497 LanguageList::const_iterator const begin = UsedLanguages_.begin();
498 for (LanguageList::const_iterator cit = begin;
499 cit != UsedLanguages_.end();
503 languages << (*cit)->babel();
505 return languages.str();
509 std::map<std::string, std::string> LaTeXFeatures::getPolyglossiaLanguages() const
511 std::map<std::string, std::string> languages;
513 LanguageList::const_iterator const begin = UsedLanguages_.begin();
514 for (LanguageList::const_iterator cit = begin;
515 cit != UsedLanguages_.end();
517 languages[(*cit)->polyglossia()] = (*cit)->polyglossiaOpts();
523 set<string> LaTeXFeatures::getEncodingSet(string const & doc_encoding) const
525 // This does only find encodings of languages supported by babel, but
526 // that does not matter since we don't have a language with an
527 // encoding supported by inputenc but without babel support.
528 set<string> encodings;
529 LanguageList::const_iterator it = UsedLanguages_.begin();
530 LanguageList::const_iterator end = UsedLanguages_.end();
531 for (; it != end; ++it)
532 if ((*it)->encoding()->latexName() != doc_encoding &&
533 ((*it)->encoding()->package() == Encoding::inputenc
534 || (*it)->encoding()->package() == Encoding::japanese))
535 encodings.insert((*it)->encoding()->latexName());
541 char const * simplefeatures[] = {
542 // note that the package order here will be the same in the LaTeX-output
549 // subfig is handled in BufferParams.cpp
553 /*For a successful cooperation of the `wrapfig' package with the
554 `float' package you should load the `wrapfig' package *after*
555 the `float' package. See the caption package documentation
589 // listings is handled in BufferParams.cpp
598 int const nb_simplefeatures = sizeof(simplefeatures) / sizeof(char const *);
603 string const LaTeXFeatures::getColorOptions() const
605 ostringstream colors;
607 // Handling the color packages separately is needed to be able to load them
608 // before babel when hyperref is loaded with the colorlinks option
609 // for more info see Bufferparams.cpp
612 if (mustProvide("color") || mustProvide("xcolor")) {
613 string const package =
614 (mustProvide("xcolor") ? "xcolor" : "color");
615 if (params_.graphics_driver == "default"
616 || params_.graphics_driver == "none")
617 colors << "\\usepackage{" << package << "}\n";
619 colors << "\\usepackage["
620 << params_.graphics_driver
621 << "]{" << package << "}\n";
624 // pdfcolmk must be loaded after color
625 if (mustProvide("pdfcolmk"))
626 colors << "\\usepackage{pdfcolmk}\n";
628 // the following 3 color commands must be set after color
629 // is loaded and before pdfpages, therefore add the command
630 // here define the set color
631 if (mustProvide("pagecolor")) {
632 colors << "\\definecolor{page_backgroundcolor}{rgb}{";
633 colors << outputLaTeXColor(params_.backgroundcolor) << "}\n";
634 // set the page color
635 colors << "\\pagecolor{page_backgroundcolor}\n";
638 if (mustProvide("fontcolor")) {
639 colors << "\\definecolor{document_fontcolor}{rgb}{";
640 colors << outputLaTeXColor(params_.fontcolor) << "}\n";
642 colors << "\\color{document_fontcolor}\n";
645 if (mustProvide("lyxgreyedout")) {
646 colors << "\\definecolor{note_fontcolor}{rgb}{";
647 colors << outputLaTeXColor(params_.notefontcolor) << "}\n";
648 // the color will be set together with the definition of
649 // the lyxgreyedout environment (see lyxgreyedout_def)
652 // color for shaded boxes
653 if (isRequired("framed") && mustProvide("color")) {
654 colors << "\\definecolor{shadecolor}{rgb}{";
655 colors << outputLaTeXColor(params_.boxbgcolor) << "}\n";
656 // this color is automatically used by the LaTeX-package "framed"
663 string const LaTeXFeatures::getPackages() const
665 ostringstream packages;
666 DocumentClass const & tclass = params_.documentClass();
668 // FIXME: currently, we can only load packages and macros known
670 // However, with the Require tag of layouts/custom insets,
671 // also unknown packages can be requested. They are silently
672 // swallowed now. We should change this eventually.
675 // These are all the 'simple' includes. i.e
676 // packages which we just \usepackage{package}
678 for (int i = 0; i < nb_simplefeatures; ++i) {
679 if (mustProvide(simplefeatures[i]))
680 packages << "\\usepackage{"
681 << simplefeatures[i] << "}\n";
685 // The rest of these packages are somewhat more complicated
689 // if fontspec is used, AMS packages have to be loaded before
690 // fontspec (in BufferParams)
691 string const amsPackages = loadAMSPackages();
692 if (!params_.useNonTeXFonts && !amsPackages.empty())
693 packages << amsPackages;
695 // fixltx2e must be loaded after amsthm, since amsthm produces an error with
696 // the redefined \[ command (bug 7233). Load it as early as possible, since
697 // other packages might profit from it.
698 if (mustProvide("fixltx2e"))
699 packages << "\\usepackage{fixltx2e}\n";
701 // wasysym is a simple feature, but it must be after amsmath if both
703 // wasysym redefines some integrals (e.g. iint) from amsmath. That
704 // leads to inconsistent integrals. We only load this package if
705 // the document does not contain integrals (then isRequired("esint")
706 // is false) or if esint is used, since esint redefines all relevant
707 // integral symbols from wasysym and amsmath.
708 // See http://www.lyx.org/trac/ticket/1942
709 if (mustProvide("wasysym") &&
710 params_.use_package("wasysym") != BufferParams::package_off &&
711 (params_.use_package("esint") != BufferParams::package_off || !isRequired("esint")))
712 packages << "\\usepackage{wasysym}\n";
714 // accents must be loaded after amsmath
715 if (mustProvide("accents") &&
716 params_.use_package("accents") != BufferParams::package_off)
717 packages << "\\usepackage{accents}\n";
719 // mathdots must be loaded after amsmath
720 if (mustProvide("mathdots") &&
721 params_.use_package("mathdots") != BufferParams::package_off)
722 packages << "\\usepackage{mathdots}\n";
724 // yhmath must be loaded after amsmath
725 if (mustProvide("yhmath") &&
726 params_.use_package("yhmath") != BufferParams::package_off)
727 packages << "\\usepackage{yhmath}\n";
729 if (mustProvide("undertilde") &&
730 params_.use_package("undertilde") != BufferParams::package_off)
731 packages << "\\usepackage{undertilde}\n";
733 // [x]color and pdfcolmk are handled in getColorOptions() above
736 if (isRequired("makeidx") || isRequired("splitidx")) {
737 if (!tclass.provides("makeidx") && !isRequired("splitidx"))
738 packages << "\\usepackage{makeidx}\n";
739 if (!tclass.provides("splitidx") && isRequired("splitidx"))
740 packages << "\\usepackage{splitidx}\n";
741 packages << "\\makeindex\n";
745 if (mustProvide("graphicx") && params_.graphics_driver != "none") {
746 if (params_.graphics_driver == "default")
747 packages << "\\usepackage{graphicx}\n";
749 packages << "\\usepackage["
750 << params_.graphics_driver
754 // lyxskak.sty --- newer chess support based on skak.sty
755 if (mustProvide("chess"))
756 packages << "\\usepackage[ps,mover]{lyxskak}\n";
759 if (mustProvide("setspace") && !tclass.provides("SetSpace"))
760 packages << "\\usepackage{setspace}\n";
762 // esint must be after amsmath and wasysym, since it will redeclare
763 // inconsistent integral symbols
764 if (mustProvide("esint") &&
765 params_.use_package("esint") != BufferParams::package_off)
766 packages << "\\usepackage{esint}\n";
769 // Some classes load natbib themselves, but still allow (or even require)
770 // plain numeric citations (ReVTeX is such a case, see bug 5182).
771 // This special case is indicated by the "natbib-internal" key.
772 if (mustProvide("natbib") && !tclass.provides("natbib-internal")) {
773 packages << "\\usepackage[";
774 if (params_.citeEngineType() == ENGINE_TYPE_NUMERICAL)
775 packages << "numbers";
777 packages << "authoryear";
778 packages << "]{natbib}\n";
781 // jurabib -- we need version 0.6 at least.
782 if (mustProvide("jurabib"))
783 packages << "\\usepackage{jurabib}[2004/01/25]\n";
785 // xargs -- we need version 1.09 at least
786 if (mustProvide("xargs"))
787 packages << "\\usepackage{xargs}[2008/03/08]\n";
789 // bibtopic -- the dot provides the aux file naming which
791 if (mustProvide("bibtopic"))
792 packages << "\\usepackage[dot]{bibtopic}\n";
794 if (mustProvide("xy"))
795 packages << "\\usepackage[all]{xy}\n";
797 if (mustProvide("feyn"))
798 packages << "\\usepackage{feyn}\n"; //Diagram
800 if (mustProvide("ulem"))
801 packages << "\\PassOptionsToPackage{normalem}{ulem}\n"
802 "\\usepackage{ulem}\n";
804 if (mustProvide("mhchem") &&
805 params_.use_package("mhchem") != BufferParams::package_off)
806 packages << "\\PassOptionsToPackage{version=3}{mhchem}\n"
807 "\\usepackage{mhchem}\n";
809 if (mustProvide("nomencl")) {
810 // Make it work with the new and old version of the package,
811 // but don't use the compatibility option since it is
812 // incompatible to other packages.
813 packages << "\\usepackage{nomencl}\n"
814 "% the following is useful when we have the old nomencl.sty package\n"
815 "\\providecommand{\\printnomenclature}{\\printglossary}\n"
816 "\\providecommand{\\makenomenclature}{\\makeglossary}\n"
817 "\\makenomenclature\n";
820 // fixltx2e provides subscript
821 if (mustProvide("subscript") && !isRequired("fixltx2e"))
822 packages << "\\usepackage{subscript}\n";
824 return packages.str();
828 string LaTeXFeatures::getPreambleSnippets() const
831 SnippetList::const_iterator pit = preamble_snippets_.begin();
832 SnippetList::const_iterator pend = preamble_snippets_.end();
833 for (; pit != pend; ++pit)
834 snip << *pit << '\n';
839 std::string LaTeXFeatures::getCSSSnippets() const
842 SnippetList::const_iterator pit = css_snippets_.begin();
843 SnippetList::const_iterator pend = css_snippets_.end();
844 for (; pit != pend; ++pit)
845 snip << *pit << '\n';
850 docstring const LaTeXFeatures::getMacros() const
852 odocstringstream macros;
854 if (!preamble_snippets_.empty()) {
856 macros << from_utf8(getPreambleSnippets());
859 if (mustProvide("papersize")) {
860 if (runparams_.flavor == OutputParams::LATEX)
861 macros << papersizedvi_def << '\n';
863 macros << papersizepdf_def << '\n';
866 if (mustProvide("LyX")) {
867 if (isRequired("hyperref"))
868 macros << lyx_hyperref_def << '\n';
870 macros << lyx_def << '\n';
873 if (mustProvide("noun"))
874 macros << noun_def << '\n';
876 if (mustProvide("lyxarrow"))
877 macros << lyxarrow_def << '\n';
879 if (!usePolyglossia() && mustProvide("textgreek")) {
880 // Avoid a LaTeX error if times fonts are used and the grtimes
881 // package is installed but actual fonts are not (bug 6469).
882 if (params_.fonts_roman == "times")
883 macros << subst(textgreek_def,
884 from_ascii("\\greektext #1"),
885 from_ascii("%\n \\IfFileExists"
886 "{grtm10.tfm}{}{\\fontfamily"
887 "{cmr}}\\greektext #1"))
890 macros << textgreek_def << '\n';
893 if (!usePolyglossia() && mustProvide("textcyr"))
894 macros << textcyr_def << '\n';
896 if (mustProvide("lyxmathsym"))
897 macros << lyxmathsym_def << '\n';
899 if (mustProvide("cedilla"))
900 macros << cedilla_def << '\n';
902 if (mustProvide("subring"))
903 macros << subring_def << '\n';
905 if (mustProvide("subdot"))
906 macros << subdot_def << '\n';
908 if (mustProvide("subhat"))
909 macros << subhat_def << '\n';
911 if (mustProvide("subtilde"))
912 macros << subtilde_def << '\n';
914 if (mustProvide("dacute"))
915 macros << dacute_def << '\n';
917 if (mustProvide("tipasymb"))
918 macros << tipasymb_def << '\n';
920 if (mustProvide("dgrave"))
921 macros << dgrave_def << '\n';
923 if (mustProvide("rcap"))
924 macros << rcap_def << '\n';
926 if (mustProvide("ogonek"))
927 macros << ogonek_def << '\n';
930 if (mustProvide("quotesinglbase"))
931 macros << quotesinglbase_def << '\n';
932 if (mustProvide("quotedblbase"))
933 macros << quotedblbase_def << '\n';
934 if (mustProvide("guilsinglleft"))
935 macros << guilsinglleft_def << '\n';
936 if (mustProvide("guilsinglright"))
937 macros << guilsinglright_def << '\n';
938 if (mustProvide("guillemotleft"))
939 macros << guillemotleft_def << '\n';
940 if (mustProvide("guillemotright"))
941 macros << guillemotright_def << '\n';
944 if (mustProvide("binom") && !isRequired("amsmath"))
945 macros << binom_def << '\n';
946 if (mustProvide("mathcircumflex"))
947 macros << mathcircumflex_def << '\n';
950 if (mustProvide("ParagraphLeftIndent"))
951 macros << paragraphleftindent_def;
952 if (mustProvide("NeedLyXFootnoteCode"))
953 macros << floatingfootnote_def;
955 // some problems with tex->html converters
956 if (mustProvide("NeedTabularnewline"))
957 macros << tabularnewline_def;
959 // greyed-out environment (note inset)
960 // the color is specified in the routine
961 // getColorOptions() to avoid LaTeX-package clashes
962 if (mustProvide("lyxgreyedout"))
963 macros << lyxgreyedout_def;
965 if (mustProvide("lyxdot"))
966 macros << lyxdot_def << '\n';
969 getFloatDefinitions(macros);
971 if (mustProvide("refstyle"))
972 macros << lyxref_def << '\n';
975 if (mustProvide("ct-dvipost"))
976 macros << changetracking_dvipost_def;
978 if (mustProvide("ct-xcolor-ulem")) {
979 streamsize const prec = macros.precision(2);
981 RGBColor cadd = rgbFromHexName(lcolor.getX11Name(Color_addedtext));
982 macros << "\\providecolor{lyxadded}{rgb}{"
983 << cadd.r / 255.0 << ',' << cadd.g / 255.0 << ',' << cadd.b / 255.0 << "}\n";
985 RGBColor cdel = rgbFromHexName(lcolor.getX11Name(Color_deletedtext));
986 macros << "\\providecolor{lyxdeleted}{rgb}{"
987 << cdel.r / 255.0 << ',' << cdel.g / 255.0 << ',' << cdel.b / 255.0 << "}\n";
989 macros.precision(prec);
991 if (isRequired("hyperref"))
992 macros << changetracking_xcolor_ulem_hyperref_def;
994 macros << changetracking_xcolor_ulem_def;
997 if (mustProvide("ct-none"))
998 macros << changetracking_none_def;
1000 return macros.str();
1004 string const LaTeXFeatures::getBabelPresettings() const
1008 LanguageList::const_iterator it = UsedLanguages_.begin();
1009 LanguageList::const_iterator end = UsedLanguages_.end();
1010 for (; it != end; ++it)
1011 if (!(*it)->babel_presettings().empty())
1012 tmp << (*it)->babel_presettings() << '\n';
1013 if (!params_.language->babel_presettings().empty())
1014 tmp << params_.language->babel_presettings() << '\n';
1020 string const LaTeXFeatures::getBabelPostsettings() const
1024 LanguageList::const_iterator it = UsedLanguages_.begin();
1025 LanguageList::const_iterator end = UsedLanguages_.end();
1026 for (; it != end; ++it)
1027 if (!(*it)->babel_postsettings().empty())
1028 tmp << (*it)->babel_postsettings() << '\n';
1029 if (!params_.language->babel_postsettings().empty())
1030 tmp << params_.language->babel_postsettings() << '\n';
1036 bool LaTeXFeatures::needBabelLangOptions() const
1038 if (!lyxrc.language_global_options || params_.language->asBabelOptions())
1041 LanguageList::const_iterator it = UsedLanguages_.begin();
1042 LanguageList::const_iterator end = UsedLanguages_.end();
1043 for (; it != end; ++it)
1044 if ((*it)->asBabelOptions())
1051 string const LaTeXFeatures::loadAMSPackages() const
1054 if (mustProvide("amsthm"))
1055 tmp << "\\usepackage{amsthm}\n";
1057 if (mustProvide("amsmath")
1058 && params_.use_package("amsmath") != BufferParams::package_off) {
1059 tmp << "\\usepackage{amsmath}\n";
1061 // amsbsy and amstext are already provided by amsmath
1062 if (mustProvide("amsbsy"))
1063 tmp << "\\usepackage{amsbsy}\n";
1064 if (mustProvide("amstext"))
1065 tmp << "\\usepackage{amstext}\n";
1068 if (mustProvide("amssymb")
1069 || params_.use_package("amsmath") == BufferParams::package_on)
1070 tmp << "\\usepackage{amssymb}\n";
1076 docstring const LaTeXFeatures::getTClassPreamble() const
1078 // the text class specific preamble
1079 DocumentClass const & tclass = params_.documentClass();
1080 odocstringstream tcpreamble;
1082 tcpreamble << tclass.preamble();
1084 list<docstring>::const_iterator cit = usedLayouts_.begin();
1085 list<docstring>::const_iterator end = usedLayouts_.end();
1086 for (; cit != end; ++cit)
1087 tcpreamble << tclass[*cit].preamble();
1089 cit = usedInsetLayouts_.begin();
1090 end = usedInsetLayouts_.end();
1091 TextClass::InsetLayouts const & ils = tclass.insetLayouts();
1092 for (; cit != end; ++cit) {
1093 TextClass::InsetLayouts::const_iterator it = ils.find(*cit);
1094 if (it == ils.end())
1096 tcpreamble << it->second.preamble();
1099 return tcpreamble.str();
1103 docstring const LaTeXFeatures::getTClassHTMLPreamble() const
1105 DocumentClass const & tclass = params_.documentClass();
1106 odocstringstream tcpreamble;
1108 tcpreamble << tclass.htmlpreamble();
1110 list<docstring>::const_iterator cit = usedLayouts_.begin();
1111 list<docstring>::const_iterator end = usedLayouts_.end();
1112 for (; cit != end; ++cit)
1113 tcpreamble << tclass[*cit].htmlpreamble();
1115 cit = usedInsetLayouts_.begin();
1116 end = usedInsetLayouts_.end();
1117 TextClass::InsetLayouts const & ils = tclass.insetLayouts();
1118 for (; cit != end; ++cit) {
1119 TextClass::InsetLayouts::const_iterator it = ils.find(*cit);
1120 if (it == ils.end())
1122 tcpreamble << it->second.htmlpreamble();
1125 return tcpreamble.str();
1129 docstring const LaTeXFeatures::getTClassHTMLStyles() const
1131 DocumentClass const & tclass = params_.documentClass();
1132 odocstringstream tcpreamble;
1134 tcpreamble << tclass.htmlstyles();
1136 list<docstring>::const_iterator cit = usedLayouts_.begin();
1137 list<docstring>::const_iterator end = usedLayouts_.end();
1138 for (; cit != end; ++cit)
1139 tcpreamble << tclass[*cit].htmlstyle();
1141 cit = usedInsetLayouts_.begin();
1142 end = usedInsetLayouts_.end();
1143 TextClass::InsetLayouts const & ils = tclass.insetLayouts();
1144 for (; cit != end; ++cit) {
1145 TextClass::InsetLayouts::const_iterator it = ils.find(*cit);
1146 if (it == ils.end())
1148 tcpreamble << it->second.htmlstyle();
1151 return tcpreamble.str();
1156 docstring const getFloatI18nPreamble(docstring const & type,
1157 docstring const & name, Language const * lang,
1158 Encoding const & enc, bool const polyglossia)
1160 // Check whether name can be encoded in the buffer encoding
1161 bool encodable = true;
1162 for (size_t i = 0; i < name.size(); ++i) {
1163 if (!enc.encodable(name[i])) {
1169 docstring const language = polyglossia ? from_ascii(lang->polyglossia())
1170 : from_ascii(lang->babel());
1171 docstring const langenc = from_ascii(lang->encoding()->iconvName());
1172 docstring const texenc = from_ascii(lang->encoding()->latexName());
1173 docstring const bufenc = from_ascii(enc.iconvName());
1174 docstring const s1 = docstring(1, 0xF0000);
1175 docstring const s2 = docstring(1, 0xF0001);
1176 docstring const translated = encodable ? name
1177 : from_ascii("\\inputencoding{") + texenc + from_ascii("}")
1178 + s1 + langenc + s2 + name + s1 + bufenc + s2;
1180 odocstringstream os;
1181 os << "\\addto\\captions" << language
1182 << "{\\renewcommand{\\" << type << "name}{" << translated << "}}\n";
1187 docstring const i18npreamble(docstring const & templ, Language const * lang,
1188 Encoding const & enc, bool const polyglossia)
1193 string preamble = polyglossia ?
1194 subst(to_utf8(templ), "$$lang", lang->polyglossia()) :
1195 subst(to_utf8(templ), "$$lang", lang->babel());
1197 string const langenc = lang->encoding()->iconvName();
1198 string const texenc = lang->encoding()->latexName();
1199 string const bufenc = enc.iconvName();
1200 // First and second character of plane 15 (Private Use Area)
1201 string const s1 = "\xf3\xb0\x80\x80"; // U+F0000
1202 string const s2 = "\xf3\xb0\x80\x81"; // U+F0001
1204 // lyx::regex is not unicode-safe.
1205 // Should use QRegExp or (boost::u32regex, but that requires ICU)
1206 static regex const reg("_\\(([^\\)]+)\\)");
1208 while (regex_search(preamble, sub, reg)) {
1209 string const key = sub.str(1);
1210 docstring const name = lang->translateLayout(key);
1211 // Check whether name can be encoded in the buffer encoding
1212 bool encodable = true;
1213 for (size_t i = 0; i < name.size(); ++i) {
1214 if (!enc.encodable(name[i])) {
1219 string const translated = encodable ? to_utf8(name)
1220 : "\\inputencoding{" + texenc + "}"
1221 + s1 + langenc + s2 + to_utf8(name)
1223 preamble = subst(preamble, sub.str(), translated);
1225 return from_utf8(preamble);
1231 docstring const LaTeXFeatures::getTClassI18nPreamble(bool use_babel, bool use_polyglossia) const
1233 DocumentClass const & tclass = params_.documentClass();
1234 // collect preamble snippets in a set to prevent multiple identical
1235 // commands (would happen if e.g. both theorem and theorem* are used)
1236 set<docstring> snippets;
1237 typedef LanguageList::const_iterator lang_it;
1238 lang_it const lbeg = UsedLanguages_.begin();
1239 lang_it const lend = UsedLanguages_.end();
1240 list<docstring>::const_iterator cit = usedLayouts_.begin();
1241 list<docstring>::const_iterator end = usedLayouts_.end();
1242 for (; cit != end; ++cit) {
1243 // language dependent commands (once per document)
1244 snippets.insert(i18npreamble(tclass[*cit].langpreamble(),
1245 buffer().language(),
1246 buffer().params().encoding(),
1248 // commands for language changing (for multilanguage documents)
1249 if ((use_babel || use_polyglossia) && !UsedLanguages_.empty()) {
1250 snippets.insert(i18npreamble(
1251 tclass[*cit].babelpreamble(),
1252 buffer().language(),
1253 buffer().params().encoding(),
1255 for (lang_it lit = lbeg; lit != lend; ++lit)
1256 snippets.insert(i18npreamble(
1257 tclass[*cit].babelpreamble(),
1259 buffer().params().encoding(),
1263 if ((use_babel || use_polyglossia) && !UsedLanguages_.empty()) {
1264 FloatList const & floats = params_.documentClass().floats();
1265 UsedFloats::const_iterator fit = usedFloats_.begin();
1266 UsedFloats::const_iterator fend = usedFloats_.end();
1267 for (; fit != fend; ++fit) {
1268 Floating const & fl = floats.getType(fit->first);
1269 // we assume builtin floats are translated
1270 if (fl.isPredefined())
1272 docstring const type = from_ascii(fl.floattype());
1273 docstring const flname = from_utf8(fl.name());
1274 docstring name = buffer().language()->translateLayout(fl.name());
1275 // only request translation if we have a real translation
1276 // (that differs from the source)
1278 snippets.insert(getFloatI18nPreamble(
1279 type, name, buffer().language(),
1280 buffer().params().encoding(),
1282 for (lang_it lit = lbeg; lit != lend; ++lit) {
1283 string const code = (*lit)->code();
1284 name = (*lit)->translateLayout(fl.name());
1285 // we assume we have a suitable translation if
1286 // either the language is English (we need to
1287 // translate into English if English is a secondary
1288 // language) or if translateIfPossible returns
1289 // something different to the English source.
1290 bool const have_translation =
1291 (flname != name || contains(code, "en"));
1292 if (have_translation)
1293 snippets.insert(getFloatI18nPreamble(
1295 buffer().params().encoding(),
1301 cit = usedInsetLayouts_.begin();
1302 end = usedInsetLayouts_.end();
1303 TextClass::InsetLayouts const & ils = tclass.insetLayouts();
1304 for (; cit != end; ++cit) {
1305 TextClass::InsetLayouts::const_iterator it = ils.find(*cit);
1306 if (it == ils.end())
1308 // language dependent commands (once per document)
1309 snippets.insert(i18npreamble(it->second.langpreamble(),
1310 buffer().language(),
1311 buffer().params().encoding(),
1313 // commands for language changing (for multilanguage documents)
1314 if ((use_babel || use_polyglossia) && !UsedLanguages_.empty()) {
1315 snippets.insert(i18npreamble(
1316 it->second.babelpreamble(),
1317 buffer().language(),
1318 buffer().params().encoding(),
1320 for (lang_it lit = lbeg; lit != lend; ++lit)
1321 snippets.insert(i18npreamble(
1322 it->second.babelpreamble(),
1324 buffer().params().encoding(),
1329 odocstringstream tcpreamble;
1330 set<docstring>::const_iterator const send = snippets.end();
1331 set<docstring>::const_iterator it = snippets.begin();
1332 for (; it != send; ++it)
1334 return tcpreamble.str();
1338 docstring const LaTeXFeatures::getLyXSGMLEntities() const
1340 // Definition of entities used in the document that are LyX related.
1341 odocstringstream entities;
1343 if (mustProvide("lyxarrow")) {
1344 entities << "<!ENTITY lyxarrow \"->\">" << '\n';
1347 return entities.str();
1351 docstring const LaTeXFeatures::getIncludedFiles(string const & fname) const
1353 odocstringstream sgmlpreamble;
1355 docstring const basename(from_utf8(onlyPath(fname)));
1357 FileMap::const_iterator end = IncludedFiles_.end();
1358 for (FileMap::const_iterator fi = IncludedFiles_.begin();
1361 sgmlpreamble << "\n<!ENTITY " << fi->first
1362 << (isSGMLFileName(fi->second) ? " SYSTEM \"" : " \"")
1363 << makeRelPath(from_utf8(fi->second), basename) << "\">";
1365 return sgmlpreamble.str();
1369 void LaTeXFeatures::showStruct() const
1371 lyxerr << "LyX needs the following commands when LaTeXing:"
1372 << "\n***** Packages:" << getPackages()
1373 << "\n***** Macros:" << to_utf8(getMacros())
1374 << "\n***** Textclass stuff:" << to_utf8(getTClassPreamble())
1375 << "\n***** done." << endl;
1379 Buffer const & LaTeXFeatures::buffer() const
1385 void LaTeXFeatures::setBuffer(Buffer const & buffer)
1391 BufferParams const & LaTeXFeatures::bufferParams() const
1397 void LaTeXFeatures::getFloatDefinitions(odocstream & os) const
1399 FloatList const & floats = params_.documentClass().floats();
1401 // Here we will output the code to create the needed float styles.
1402 // We will try to do this as minimal as possible.
1403 // \floatstyle{ruled}
1404 // \newfloat{algorithm}{htbp}{loa}
1405 // \providecommand{\algorithmname}{Algorithm}
1406 // \floatname{algorithm}{\protect\algorithmname}
1407 UsedFloats::const_iterator cit = usedFloats_.begin();
1408 UsedFloats::const_iterator end = usedFloats_.end();
1409 for (; cit != end; ++cit) {
1410 Floating const & fl = floats.getType(cit->first);
1412 // For builtin floats we do nothing.
1413 if (fl.isPredefined())
1416 // We have to special case "table" and "figure"
1417 if (fl.floattype() == "tabular" || fl.floattype() == "figure") {
1418 // Output code to modify "table" or "figure"
1419 // but only if builtin == false
1420 // and that have to be true at this point in the
1422 docstring const type = from_ascii(fl.floattype());
1423 docstring const placement = from_ascii(fl.placement());
1424 docstring const style = from_ascii(fl.style());
1425 if (!style.empty()) {
1426 os << "\\floatstyle{" << style << "}\n"
1427 << "\\restylefloat{" << type << "}\n";
1429 if (!placement.empty()) {
1430 os << "\\floatplacement{" << type << "}{"
1431 << placement << "}\n";
1434 // The other non builtin floats.
1436 docstring const type = from_ascii(fl.floattype());
1437 docstring const placement = from_ascii(fl.placement());
1438 docstring const ext = from_ascii(fl.ext());
1439 docstring const within = from_ascii(fl.within());
1440 docstring const style = from_ascii(fl.style());
1441 docstring const name =
1442 buffer().language()->translateLayout(fl.name());
1443 os << "\\floatstyle{" << style << "}\n"
1444 << "\\newfloat{" << type << "}{" << placement
1445 << "}{" << ext << '}';
1446 if (!within.empty())
1447 os << '[' << within << ']';
1449 << "\\providecommand{\\" << type << "name}{"
1451 << "\\floatname{" << type << "}{\\protect\\"
1452 << type << "name}\n";
1454 // What missing here is to code to minimalize the code
1455 // output so that the same floatstyle will not be
1456 // used several times, when the same style is still in
1460 os << "\n\\newsubfloat{" << from_ascii(fl.floattype()) << "}\n";
1465 void LaTeXFeatures::resolveAlternatives()
1467 for (Features::iterator it = features_.begin(); it != features_.end();) {
1468 if (contains(*it, '|')) {
1469 vector<string> const alternatives = getVectorFromString(*it, "|");
1470 vector<string>::const_iterator const end = alternatives.end();
1471 vector<string>::const_iterator ita = alternatives.begin();
1472 for (; ita != end; ++ita) {
1473 if (isRequired(*ita))
1477 require(alternatives.front());
1478 features_.erase(it);
1479 it = features_.begin();