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
7 * \author Jean-Marc Lasgouttes
8 * \author Angus Leeming
12 * Full author contact details are available in file CREDITS.
19 #include "BufferParams.h" // stateText
23 #include "LaTeXFeatures.h"
26 #include "output_latex.h"
27 #include "OutputParams.h"
28 #include "texstream.h"
30 #include "support/lassert.h"
31 #include "support/convert.h"
32 #include "support/debug.h"
33 #include "support/gettext.h"
34 #include "support/lstrings.h"
39 using namespace lyx::support;
44 // Strings used to read and write .lyx format files
46 // These are defined in FontInfo.cpp
47 extern char const * LyXFamilyNames[NUM_FAMILIES + 2];
48 extern char const * LyXSeriesNames[NUM_SERIES + 2];
49 extern char const * LyXShapeNames[NUM_SHAPE + 2];
50 extern char const * LyXSizeNames[NUM_SIZE + 4];
51 extern char const * LyXMiscNames[5];
59 char const * GUIFamilyNames[NUM_FAMILIES + 2 /* default & error */] =
60 { N_("Roman"), N_("Sans Serif"), N_("Typewriter"), N_("Symbol"),
61 "cmr", "cmsy", "cmm", "cmex", "msa", "msb", "eufrak", "rsfs", "stmry",
62 "wasy", "esint", N_("Inherit"), N_("Ignore") };
64 char const * GUISeriesNames[NUM_SERIES + 2 /* default & error */] =
65 { N_("Medium"), N_("Bold"), N_("Inherit"), N_("Ignore") };
67 char const * GUIShapeNames[NUM_SHAPE + 2 /* default & error */] =
68 { N_("Upright"), N_("Italic"), N_("Slanted"), N_("Smallcaps"), N_("Inherit"),
71 char const * GUISizeNames[NUM_SIZE + 4 /* increase, decrease, default & error */] =
72 { N_("Tiny"), N_("Smallest"), N_("Smaller"), N_("Small"), N_("Normal"), N_("Large"),
73 N_("Larger"), N_("Largest"), N_("Huge"), N_("Huger"), N_("Increase"), N_("Decrease"),
74 N_("Inherit"), N_("Ignore") };
76 char const * GUIMiscNames[5] =
77 { N_("Off"), N_("On"), N_("Toggle"), N_("Inherit"), N_("Ignore") };
80 // Strings used to write LaTeX files
82 char const * LaTeXFamilyNames[NUM_FAMILIES + 2] =
83 { "textrm", "textsf", "texttt", "error1", "error2", "error3", "error4",
84 "error5", "error6", "error7", "error8", "error9", "error10", "error11",
85 "error12", "error13" };
87 char const * LaTeXSeriesNames[NUM_SERIES + 2] =
88 { "textmd", "textbf", "error4", "error5" };
90 char const * LaTeXShapeNames[NUM_SHAPE + 2] =
91 { "textup", "textit", "textsl", "textsc", "error6", "error7" };
93 char const * LaTeXSizeNames[NUM_SIZE + 4] =
94 { "tiny", "scriptsize", "footnotesize", "small", "normalsize", "large",
95 "Large", "LARGE", "huge", "Huge", "error8", "error9", "error10", "error11" };
100 Font::Font(FontInfo bits, Language const * l)
101 : bits_(bits), lang_(l), open_encoding_(false)
104 lang_ = default_language;
108 bool Font::isRightToLeft() const
110 return lang_->rightToLeft();
114 bool Font::isVisibleRightToLeft() const
116 return (lang_->rightToLeft() &&
117 bits_.number() != FONT_ON);
121 void Font::setLanguage(Language const * l)
127 /// Updates font settings according to request
128 void Font::update(Font const & newfont,
129 Language const * document_language,
132 bits_.update(newfont.fontInfo(), toggleall);
134 if (newfont.language() == language() && toggleall)
135 if (language() == document_language)
136 setLanguage(default_language);
138 setLanguage(document_language);
139 else if (newfont.language() == reset_language)
140 setLanguage(document_language);
141 else if (newfont.language() != ignore_language)
142 setLanguage(newfont.language());
146 docstring const stateText(FontInfo const & f, bool const terse)
149 if (f.family() != INHERIT_FAMILY && (!terse || f.family() != IGNORE_FAMILY))
150 os << _(GUIFamilyNames[f.family()]) << ", ";
151 if (f.series() != INHERIT_SERIES && (!terse || f.series() != IGNORE_SERIES))
152 os << _(GUISeriesNames[f.series()]) << ", ";
153 if (f.shape() != INHERIT_SHAPE && (!terse || f.shape() != IGNORE_SHAPE))
154 os << _(GUIShapeNames[f.shape()]) << ", ";
155 if (f.size() != FONT_SIZE_INHERIT && (!terse || f.size() != FONT_SIZE_IGNORE))
156 os << _(GUISizeNames[f.size()]) << ", ";
157 // FIXME: shall style be handled there? Probably not.
158 if (f.color() != Color_inherit && (!terse || f.color() != Color_ignore))
159 os << lcolor.getGUIName(f.color()) << ", ";
160 // FIXME: uncomment this when we support background.
161 //if (f.background() != Color_inherit)
162 // os << lcolor.getGUIName(f.background()) << ", ";
163 if (f.emph() != FONT_INHERIT && (!terse || f.emph() != FONT_IGNORE))
164 os << bformat(_("Emphasis %1$s, "),
165 _(GUIMiscNames[f.emph()]));
166 if (f.underbar() != FONT_INHERIT && (!terse || f.underbar() == FONT_ON))
167 os << bformat(_("Underline %1$s, "),
168 _(GUIMiscNames[f.underbar()]));
169 if (f.uuline() != FONT_INHERIT && (!terse || f.uuline() == FONT_ON))
170 os << bformat(_("Double underline %1$s, "),
171 _(GUIMiscNames[f.uuline()]));
172 if (f.uwave() != FONT_INHERIT && (!terse || f.uwave() == FONT_ON))
173 os << bformat(_("Wavy underline %1$s, "),
174 _(GUIMiscNames[f.uwave()]));
175 if (f.strikeout() != FONT_INHERIT && (!terse || f.strikeout() == FONT_ON))
176 os << bformat(_("Strike out %1$s, "),
177 _(GUIMiscNames[f.strikeout()]));
178 if (f.xout() != FONT_INHERIT && (!terse || f.xout() == FONT_ON))
179 os << bformat(_("Cross out %1$s, "),
180 _(GUIMiscNames[f.xout()]));
181 if (f.noun() != FONT_INHERIT && (!terse || f.noun() != FONT_IGNORE))
182 os << bformat(_("Noun %1$s, "),
183 _(GUIMiscNames[f.noun()]));
184 if (f == inherit_font)
185 os << _("Default") << ", ";
191 docstring const Font::stateText(BufferParams * params, bool const terse) const
194 os << lyx::stateText(bits_, terse);
195 if ((!params || (language() != params->language))
196 && (!terse || language() != ignore_language)) {
197 // reset_language is a null pointer!
198 os << bformat(_("Language: %1$s, "),
199 (language() == reset_language) ? _("Default")
200 : _(language()->display()));
202 if (bits_.number() != FONT_OFF)
203 os << " " << bformat(_("Number %1$s"),
204 _(GUIMiscNames[bits_.number()]));
205 return rtrim(os.str(), ", ");
209 // Returns size in latex format
210 string const Font::latexSize() const
212 return LaTeXSizeNames[bits_.size()];
216 /// Writes the changes from this font to orgfont in .lyx format in file
217 void Font::lyxWriteChanges(Font const & orgfont,
221 if (orgfont.fontInfo().family() != bits_.family())
222 os << "\\family " << LyXFamilyNames[bits_.family()] << "\n";
223 if (orgfont.fontInfo().series() != bits_.series())
224 os << "\\series " << LyXSeriesNames[bits_.series()] << "\n";
225 if (orgfont.fontInfo().shape() != bits_.shape())
226 os << "\\shape " << LyXShapeNames[bits_.shape()] << "\n";
227 if (orgfont.fontInfo().size() != bits_.size())
228 os << "\\size " << LyXSizeNames[bits_.size()] << "\n";
229 // FIXME: shall style be handled there? Probably not.
230 if (orgfont.fontInfo().emph() != bits_.emph())
231 os << "\\emph " << LyXMiscNames[bits_.emph()] << "\n";
232 if (orgfont.fontInfo().number() != bits_.number())
233 os << "\\numeric " << LyXMiscNames[bits_.number()] << "\n";
234 if (orgfont.fontInfo().nospellcheck() != bits_.nospellcheck())
235 os << "\\nospellcheck " << LyXMiscNames[bits_.nospellcheck()] << "\n";
236 if (orgfont.fontInfo().underbar() != bits_.underbar()) {
237 // This is only for backwards compatibility
238 switch (bits_.underbar()) {
239 case FONT_OFF: os << "\\bar no\n"; break;
240 case FONT_ON: os << "\\bar under\n"; break;
241 case FONT_TOGGLE: lyxerr << "Font::lyxWriteFontChanges: "
242 "FONT_TOGGLE should not appear here!"
245 case FONT_INHERIT: os << "\\bar default\n"; break;
246 case FONT_IGNORE: lyxerr << "Font::lyxWriteFontChanges: "
247 "IGNORE should not appear here!"
252 if (orgfont.fontInfo().strikeout() != bits_.strikeout()) {
253 os << "\\strikeout " << LyXMiscNames[bits_.strikeout()] << "\n";
255 if (orgfont.fontInfo().xout() != bits_.xout()) {
256 os << "\\xout " << LyXMiscNames[bits_.xout()] << "\n";
258 if (orgfont.fontInfo().uuline() != bits_.uuline()) {
259 os << "\\uuline " << LyXMiscNames[bits_.uuline()] << "\n";
261 if (orgfont.fontInfo().uwave() != bits_.uwave()) {
262 os << "\\uwave " << LyXMiscNames[bits_.uwave()] << "\n";
264 if (orgfont.fontInfo().noun() != bits_.noun()) {
265 os << "\\noun " << LyXMiscNames[bits_.noun()] << "\n";
267 if (orgfont.fontInfo().color() != bits_.color())
268 os << "\\color " << lcolor.getLyXName(bits_.color()) << '\n';
269 // FIXME: uncomment this when we support background.
270 //if (orgfont.fontInfo().background() != bits_.background())
271 // os << "\\color " << lcolor.getLyXName(bits_.background()) << '\n';
272 if (orgfont.language() != language() &&
273 language() != latex_language) {
275 os << "\\lang " << language()->lang() << "\n";
277 os << "\\lang unknown\n";
282 /// Writes the head of the LaTeX needed to impose this font
283 // Returns number of chars written.
284 int Font::latexWriteStartChanges(odocstream & os, BufferParams const & bparams,
285 OutputParams const & runparams,
287 Font const & prev) const
293 // polyglossia or babel?
294 if (runparams.use_polyglossia
295 && language()->lang() != base.language()->lang()
296 && language() != prev.language()) {
297 if (!language()->polyglossia().empty()) {
298 string tmp = "\\text" + language()->polyglossia();
299 if (!language()->polyglossiaOpts().empty())
300 tmp += "[" + language()->polyglossiaOpts() + "]";
302 os << from_ascii(tmp);
303 count += tmp.length();
304 pushLanguageName(language()->polyglossia(), true);
305 } else if (language()->encoding()->package() != Encoding::CJK) {
309 } else if (language()->babel() != base.language()->babel() &&
310 language() != prev.language()) {
311 if (language()->lang() == "farsi") {
314 } else if (!isRightToLeft() &&
315 base.language()->lang() == "farsi") {
318 } else if (language()->lang() == "arabic_arabi") {
321 } else if (!isRightToLeft() &&
322 base.language()->lang() == "arabic_arabi") {
325 // currently the remaining RTL languages are arabic_arabtex and hebrew
326 } else if (isRightToLeft() != prev.isRightToLeft()) {
327 if (isRightToLeft()) {
334 } else if (!language()->babel().empty()) {
336 subst(lyxrc.language_command_local,
337 "$$lang", language()->babel());
338 os << from_ascii(tmp);
339 count += tmp.length();
340 if (!lyxrc.language_command_end.empty())
341 pushLanguageName(language()->babel(), true);
342 } else if (language()->encoding()->package() != Encoding::CJK) {
348 if (language()->encoding()->package() == Encoding::CJK) {
349 pair<bool, int> const c = switchEncoding(os, bparams,
350 runparams, *(language()->encoding()));
352 open_encoding_ = true;
354 runparams.encoding = language()->encoding();
359 f.reduce(base.bits_);
361 p.reduce(prev.bits_);
363 if (f.family() != INHERIT_FAMILY) {
365 << LaTeXFamilyNames[f.family()]
367 count += strlen(LaTeXFamilyNames[f.family()]) + 2;
368 env = true; //We have opened a new environment
370 if (f.series() != INHERIT_SERIES) {
372 << LaTeXSeriesNames[f.series()]
374 count += strlen(LaTeXSeriesNames[f.series()]) + 2;
375 env = true; //We have opened a new environment
377 if (f.shape() != INHERIT_SHAPE) {
379 << LaTeXShapeNames[f.shape()]
381 count += strlen(LaTeXShapeNames[f.shape()]) + 2;
382 env = true; //We have opened a new environment
384 if (f.color() != Color_inherit && f.color() != Color_ignore) {
385 if (f.color() == Color_none && p.color() != Color_none) {
386 // Color none: Close previous color, if any
389 } else if (f.color() != Color_none) {
391 << from_ascii(lcolor.getLaTeXName(f.color()))
393 count += lcolor.getLaTeXName(f.color()).length() + 13;
395 env = true; //We have opened a new environment
397 // FIXME: uncomment this when we support background.
399 if (f.background() != Color_inherit && f.background() != Color_ignore) {
401 << from_ascii(lcolor.getLaTeXName(f.background()))
403 count += lcolor.getLaTeXName(f.background()).length() + 13;
404 env = true; //We have opened a new environment
407 // If the current language is Hebrew, Arabic, or Farsi
408 // the numbers are written Left-to-Right. ArabTeX package
409 // and bidi (polyglossia) reorder the number automatically
410 // but the packages used for Hebrew and Farsi (Arabi) do not.
411 if (!runparams.use_polyglossia
412 && !runparams.pass_thru
413 && bits_.number() == FONT_ON
414 && prev.fontInfo().number() != FONT_ON
415 && (language()->lang() == "hebrew"
416 || language()->lang() == "farsi"
417 || language()->lang() == "arabic_arabi")) {
421 if (f.emph() == FONT_ON) {
424 env = true; //We have opened a new environment
426 // \noun{} is a LyX special macro
427 if (f.noun() == FONT_ON) {
430 env = true; //We have opened a new environment
432 if (f.size() != FONT_SIZE_INHERIT) {
433 // If we didn't open an environment above, we open one here
439 << LaTeXSizeNames[f.size()]
441 count += strlen(LaTeXSizeNames[f.size()]) + 3;
443 // The ulem commands need to be on the deepest nesting level
444 // because ulem puts every nested group or macro in a box,
445 // which prevents linebreaks (#8424, #8733)
446 if (f.underbar() == FONT_ON) {
449 ++runparams.inulemcmd;
451 if (f.uuline() == FONT_ON) {
454 ++runparams.inulemcmd;
456 if (f.strikeout() == FONT_ON) {
459 ++runparams.inulemcmd;
461 if (f.xout() == FONT_ON) {
464 ++runparams.inulemcmd;
466 if (f.uwave() == FONT_ON) {
467 if (runparams.inulemcmd) {
468 // needed with nested uwave in xout
469 // see https://tex.stackexchange.com/a/263042
470 os << "\\ULdepth=1000pt";
475 ++runparams.inulemcmd;
481 /// Writes ending block of LaTeX needed to close use of this font
482 // Returns number of chars written
483 // This one corresponds to latexWriteStartChanges(). (Asger)
484 int Font::latexWriteEndChanges(otexstream & os, BufferParams const & bparams,
485 OutputParams const & runparams,
489 bool const & closeLanguage) const
494 // reduce the current font to changes against the base
495 // font (of the layout). We use a temporary for this to
496 // avoid changing this font instance, as that would break
498 f.reduce(base.bits_);
500 if (f.family() != INHERIT_FAMILY) {
503 env = true; // Size change need not bother about closing env.
505 if (f.series() != INHERIT_SERIES) {
508 env = true; // Size change need not bother about closing env.
510 if (f.shape() != INHERIT_SHAPE) {
513 env = true; // Size change need not bother about closing env.
515 if (f.color() != Color_inherit && f.color() != Color_ignore && f.color() != Color_none) {
518 env = true; // Size change need not bother about closing env.
520 if (f.emph() == FONT_ON) {
523 env = true; // Size change need not bother about closing env.
525 if (f.noun() == FONT_ON) {
528 env = true; // Size change need not bother about closing env.
530 if (f.size() != FONT_SIZE_INHERIT) {
531 // We only have to close if only size changed
533 if (needPar && !closeLanguage) {
542 if (f.underbar() == FONT_ON) {
545 --runparams.inulemcmd;
547 if (f.strikeout() == FONT_ON) {
550 --runparams.inulemcmd;
552 if (f.xout() == FONT_ON) {
555 --runparams.inulemcmd;
557 if (f.uuline() == FONT_ON) {
560 --runparams.inulemcmd;
562 if (f.uwave() == FONT_ON) {
565 --runparams.inulemcmd;
568 // If the current language is Hebrew, Arabic, or Farsi
569 // the numbers are written Left-to-Right. ArabTeX package
570 // and bidi (polyglossia) reorder the number automatically
571 // but the packages used for Hebrew and Farsi (Arabi) do not.
572 if (!runparams.use_polyglossia
573 && !runparams.pass_thru
574 && bits_.number() == FONT_ON
575 && next.fontInfo().number() != FONT_ON
576 && (language()->lang() == "hebrew"
577 || language()->lang() == "farsi"
578 || language()->lang() == "arabic_arabi")) {
583 if (open_encoding_) {
584 // We need to close the encoding even if it does not change
585 // to do correct environment nesting
586 Encoding const * const ascii = encodings.fromLyXName("ascii");
587 pair<bool, int> const c = switchEncoding(os.os(), bparams,
591 runparams.encoding = ascii;
592 open_encoding_ = false;
596 && language() != base.language() && language() != next.language()
597 && language()->encoding()->package() != Encoding::CJK) {
600 bool const using_begin_end =
601 runparams.use_polyglossia ||
602 !lyxrc.language_command_end.empty();
611 string Font::toString(bool const toggle) const
613 string const lang = (language() == reset_language)
614 ? "reset" : language()->lang();
617 os << "family " << bits_.family() << '\n'
618 << "series " << bits_.series() << '\n'
619 << "shape " << bits_.shape() << '\n'
620 << "size " << bits_.size() << '\n'
621 << "emph " << bits_.emph() << '\n'
622 << "underbar " << bits_.underbar() << '\n'
623 << "strikeout " << bits_.strikeout() << '\n'
624 << "xout " << bits_.xout() << '\n'
625 << "uuline " << bits_.uuline() << '\n'
626 << "uwave " << bits_.uwave() << '\n'
627 << "noun " << bits_.noun() << '\n'
628 << "number " << bits_.number() << '\n'
629 << "nospellcheck " << bits_.nospellcheck() << '\n'
630 << "color " << bits_.color() << '\n'
631 << "language " << lang << '\n'
632 << "toggleall " << convert<string>(toggle);
637 bool Font::fromString(string const & data, bool & toggle)
639 istringstream is(data);
647 token = lex.getString();
649 if (token.empty() || !lex.next())
652 if (token == "family") {
653 int const next = lex.getInteger();
654 bits_.setFamily(FontFamily(next));
656 } else if (token == "series") {
657 int const next = lex.getInteger();
658 bits_.setSeries(FontSeries(next));
660 } else if (token == "shape") {
661 int const next = lex.getInteger();
662 bits_.setShape(FontShape(next));
664 } else if (token == "size") {
665 int const next = lex.getInteger();
666 bits_.setSize(FontSize(next));
667 // FIXME: shall style be handled there? Probably not.
668 } else if (token == "emph" || token == "underbar"
669 || token == "noun" || token == "number"
670 || token == "uuline" || token == "uwave"
671 || token == "strikeout" || token == "xout"
672 || token == "nospellcheck") {
674 int const next = lex.getInteger();
675 FontState const misc = FontState(next);
679 else if (token == "underbar")
680 bits_.setUnderbar(misc);
681 else if (token == "strikeout")
682 bits_.setStrikeout(misc);
683 else if (token == "xout")
685 else if (token == "uuline")
686 bits_.setUuline(misc);
687 else if (token == "uwave")
688 bits_.setUwave(misc);
689 else if (token == "noun")
691 else if (token == "number")
692 bits_.setNumber(misc);
693 else if (token == "nospellcheck")
694 bits_.setNoSpellcheck(misc);
696 } else if (token == "color") {
697 int const next = lex.getInteger();
698 bits_.setColor(ColorCode(next));
701 } else if (token == "background") {
702 int const next = lex.getInteger();
703 bits_.setBackground(ColorCode(next));
706 } else if (token == "language") {
707 string const next = lex.getString();
708 setLanguage(languages.getLanguage(next));
710 } else if (token == "toggleall") {
711 toggle = lex.getBool();
714 // Unrecognised token
724 void Font::validate(LaTeXFeatures & features) const
726 BufferParams const & bparams = features.bufferParams();
727 Language const * doc_language = bparams.language;
729 if (bits_.noun() == FONT_ON) {
730 LYXERR(Debug::LATEX, "font.noun: " << bits_.noun());
731 features.require("noun");
732 LYXERR(Debug::LATEX, "Noun enabled. Font: " << to_utf8(stateText(0)));
734 if (bits_.underbar() == FONT_ON) {
735 LYXERR(Debug::LATEX, "font.underline: " << bits_.underbar());
736 features.require("ulem");
737 LYXERR(Debug::LATEX, "Underline enabled. Font: " << to_utf8(stateText(0)));
739 if (bits_.strikeout() == FONT_ON) {
740 LYXERR(Debug::LATEX, "font.strikeout: " << bits_.strikeout());
741 features.require("ulem");
742 LYXERR(Debug::LATEX, "Strike out enabled. Font: " << to_utf8(stateText(0)));
744 if (bits_.xout() == FONT_ON) {
745 LYXERR(Debug::LATEX, "font.xout: " << bits_.xout());
746 features.require("ulem");
747 LYXERR(Debug::LATEX, "Cross out enabled. Font: " << to_utf8(stateText(0)));
749 if (bits_.uuline() == FONT_ON) {
750 LYXERR(Debug::LATEX, "font.uuline: " << bits_.uuline());
751 features.require("ulem");
752 LYXERR(Debug::LATEX, "Double underline enabled. Font: " << to_utf8(stateText(0)));
754 if (bits_.uwave() == FONT_ON) {
755 LYXERR(Debug::LATEX, "font.uwave: " << bits_.uwave());
756 features.require("ulem");
757 LYXERR(Debug::LATEX, "Wavy underline enabled. Font: " << to_utf8(stateText(0)));
759 switch (bits_.color()) {
763 // probably we should put here all interface colors used for
764 // font displaying! For now I just add this ones I know of (Jug)
766 case Color_notelabel:
771 case Color_lightgray:
779 features.require("xcolor");
782 features.require("color");
783 LYXERR(Debug::LATEX, "Color enabled. Font: " << to_utf8(stateText(0)));
786 // FIXME: Do something for background and soul package?
788 if (((features.usePolyglossia() && lang_->polyglossia() != doc_language->polyglossia())
789 || (features.useBabel() && lang_->babel() != doc_language->babel())
790 || (doc_language->encoding()->package() == Encoding::CJK && lang_ != doc_language))
791 && lang_ != ignore_language
792 && lang_ != latex_language)
794 features.useLanguage(lang_);
795 LYXERR(Debug::LATEX, "Found language " << lang_->lang());
800 ostream & operator<<(ostream & os, FontState fms)
802 return os << int(fms);
806 ostream & operator<<(ostream & os, FontInfo const & f)
809 << " family " << f.family()
810 << " series " << f.series()
811 << " shape " << f.shape()
812 << " size " << f.size()
813 << " style " << f.style()
814 << " color " << f.color()
815 // FIXME: uncomment this when we support background.
816 //<< " background " << f.background()
817 << " emph " << f.emph()
818 << " underbar " << f.underbar()
819 << " strikeout " << f.strikeout()
820 << " xout " << f.xout()
821 << " uuline " << f.uuline()
822 << " uwave " << f.uwave()
823 << " noun " << f.noun()
824 << " number " << f.number()
825 << " nospellcheck " << f.nospellcheck();
829 ostream & operator<<(ostream & os, Font const & font)
831 return os << font.bits_
832 << " lang: " << (font.lang_ ? font.lang_->lang() : 0);