From a5151c92a9259ac20ba0b0056230b3297ded723f Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Sat, 22 Sep 2012 10:59:53 +0200
Subject: [PATCH] Much more flexible implementation of alternative (LaTeX)
 fonts

The LaTeX font now do not specify simply alternative packages or packages for OT1 encoding etc., but they refer to complete AltFonts (which are not directly accessible via the GUI). This way, alternative fonts can also have options (osf, sc etc.), and they can use all sorts of initializing methods (\usepackage, \setrmfamily etc.).
---
 lib/latexfonts                    |  91 +++++++---
 src/LaTeXFeatures.cpp             |  13 +-
 src/LaTeXFonts.cpp                | 270 ++++++++++++++++++------------
 src/LaTeXFonts.h                  |  52 +++---
 src/frontends/qt4/GuiDocument.cpp |  18 +-
 src/frontends/qt4/GuiDocument.h   |   2 +
 6 files changed, 287 insertions(+), 159 deletions(-)

diff --git a/lib/latexfonts b/lib/latexfonts
index b4d19a19ad..fdb59fa070 100644
--- a/lib/latexfonts
+++ b/lib/latexfonts
@@ -10,11 +10,12 @@
 #	SwitchDefault      <0|1>
 #	Package            <LaTeX package to be loaded>
 #	Requires           <LaTeX package to test for>
-#	AltPackages        <alternative packages (comma-separated)>
-#	OT1Package         <alternative package specifically for OT1 encoding>
-#	CompletePackage    <alternative package for the complete family>
+#	AltFonts           <alternative fonts (comma-separated)>
+#	OT1Font            <alternative font specifically for OT1 encoding>
+#	CompleteFont       <alternative package for the complete family>
 #	PackageOptions     <general options to be passed to the package>
 #	OsfOption          <option for oldstyle figure support>
+#	OsfFont            <extra font for oldstyle figures>
 #	OsfDefault         <0|1>
 #	ScOption           <option for true smallcaps support>
 #	OsfScOption        <option for combined osf and true smallcaps support>
@@ -33,23 +34,30 @@
 #   Package <package> loads it via \usepackage{package}. Only one of these
 #   options is used per font (SwitchDefault takes precendende). Note that
 #   SwitchDefault uses the font name.
-# * If AltPackages are defined, LyX will try to load them in the defined
+# * In addition to normal fonts, you can also define alternative fonts
+#   using the AltFont...EndFont tags. These alternative fonts will not
+#   be added to the GUI, but LyX will fall back on them under specific
+#   circumstances (e.g. if the main font is not available; see below).
+# * If AltFonts are defined, LyX will try to load them in the defined
 #   order if the main package is not available. So
 #       Package          mathptmx
-#       AltPackages      mathptm,times
+#       AltFonts         mathptm,times
 #   will try to load mathptm if mathptmx is not available and then times
 #   if mathptm is not available either.
-#   No options will be passed to alternative packages!
+#   AltFonts need to be defined separately using AltFont ... EndFont tags.
 # * If Requires is set, LyX will check for this. If not, it will check
-#   for Package and AltPackages.
-# * OT1Package will load the defined package instead of the default
-#   package if the font encoding is OT1. This is necessary since some
-#   newer packages for a font do not support this encoding.
+#   for Package and AltFonts.
+# * OT1Font will load the defined font if the font encoding is OT1. This is
+#   necessary since some newer font packages do not support this encoding.
 #   The value "none" tells LyX not to load a package in OT1 encoding.
-#   No options will be passed to OT1 packages!
-# * CompletePackage is a package that is loaded if the current font is
-#   selected as rm and both sf and tt are set to "default" (this allows
-#   f. ex. to load "bera" as opposed to "beraserif").
+#   OT1Fonts need to be defined separately using AltFont ... EndFont tags.
+# * The CompleteFont is loaded if the current font is selected as rm and
+#   both sf and tt are set to "default" (this allows f. ex. to load "bera"
+#   as opposed to "beraserif").
+#   CompleteFonts need to be defined separately using AltFont ... EndFont
+#   tags.
+# * OsfFont is a font that is loaded additionally in and that provides
+#   Old Style Figures for a given font (e.g. eco).
 # * OsfScOption overrides any OsfOption and ScOption if both features
 #   are selected.
 # * Set OsfDefault to true for fonts which have Old Style Figures by
@@ -67,7 +75,7 @@ Font ae
 	GuiName          "AE (Almost European)"
 	Family           rm
 	Package          "ae,aecompl"
-	OT1Package       none
+	OT1Font          none
 	Requires         ae
 EndFont
 
@@ -75,10 +83,16 @@ Font beraserif
 	GuiName          "Bera Serif"
 	Family           rm
 	Package          beraserif
-	CompletePackage  bera
+	CompleteFont     bera
 	Requires         bera
 EndFont
 
+AltFont bera
+	GuiName          "Bera Serif"
+	Family           rm
+	Package          bera
+EndFont
+
 Font bookman
 	GuiName          "Bookman"
 	Family           rm
@@ -107,7 +121,12 @@ Font cmr
 	GuiName          "Computer Modern Roman"
 	Family           rm
 	SwitchDefault    1
-	OsfPackage       eco
+	OsfFont          eco
+EndFont
+
+AltFont eco
+	Family           rm
+	Package          eco
 EndFont
 
 Font libertine
@@ -181,18 +200,42 @@ Font palatino
 	ScOption         sc
 	OsfScOption      osf
 	Package          mathpazo
-	AltPackages      "mathpple,palatino"
+	AltFonts         mathpple,palatino
 	Requires         psnfss
 EndFont
 
+AltFont mathpple
+	GuiName          "Palatino"
+	Family           rm
+	Package          mathpple
+EndFont
+
+AltFont palatino
+	GuiName          "Palatino"
+	Family           rm
+	Package          palatino
+EndFont
+
 Font times
 	GuiName          "Times Roman"
 	Family           rm
 	Package          mathptmx
-	AltPackages      "mathptm,times"
+	AltFonts         mathptm,times
 	Requires         psnfss
 EndFont
 
+AltFont mathptm
+	GuiName          "Times Roman"
+	Family           rm
+	Package          mathptm
+EndFont
+
+AltFont times
+	GuiName          "Times Roman"
+	Family           rm
+	Package          times
+EndFont
+
 Font tgbonum
 	GuiName          "TeX Gyre Bonum"
 	Family           rm
@@ -231,8 +274,14 @@ Font utopia
 	OsfOption        oldstyle
 	ScOption         expert
 	Package          fourier
-	AltPackages      utopia
-	OT1Package       utopia
+	AltFonts         utopia-sty
+	OT1Font          utopia-sty
+EndFont
+
+AltFont utopia-sty
+	GuiName          "Utopia (Fourier)"
+	Family           rm
+	Package          utopia
 EndFont
 
 
diff --git a/src/LaTeXFeatures.cpp b/src/LaTeXFeatures.cpp
index 34c2a0177f..7960ad2625 100644
--- a/src/LaTeXFeatures.cpp
+++ b/src/LaTeXFeatures.cpp
@@ -438,10 +438,17 @@ bool LaTeXFeatures::isRequired(string const & name) const
 
 bool LaTeXFeatures::isProvided(string const & name) const
 {
+	bool const ot1 = (params_.font_encoding() == "default"
+		|| params_.font_encoding() == "OT1");
+	bool const complete = (params_.fonts_sans == "default")
+		&& (params_.fonts_typewriter == "default");
 	return params_.documentClass().provides(name)
-		|| theLaTeXFonts().getLaTeXFont(from_ascii(params_.fonts_roman)).provides(name)
-		|| theLaTeXFonts().getLaTeXFont(from_ascii(params_.fonts_sans)).provides(name)
-		|| theLaTeXFonts().getLaTeXFont(from_ascii(params_.fonts_typewriter)).provides(name);
+		|| theLaTeXFonts().getLaTeXFont(
+			from_ascii(params_.fonts_roman)).provides(name, ot1, complete)
+		|| theLaTeXFonts().getLaTeXFont(
+			from_ascii(params_.fonts_sans)).provides(name, ot1, complete)
+		|| theLaTeXFonts().getLaTeXFont(
+			from_ascii(params_.fonts_typewriter)).provides(name, ot1, complete);
 }
 
 bool LaTeXFeatures::mustProvide(string const & name) const
diff --git a/src/LaTeXFonts.cpp b/src/LaTeXFonts.cpp
index 4084a73694..08a40ba757 100644
--- a/src/LaTeXFonts.cpp
+++ b/src/LaTeXFonts.cpp
@@ -34,54 +34,92 @@ namespace lyx {
 LaTeXFonts latexfonts;
 
 
-bool LaTeXFont::available(bool ot1) const
+LaTeXFont LaTeXFont::altFont(docstring const & name)
 {
-	return ot1 ? available_ot1_ : available_;
+	return theLaTeXFonts().getAltFont(name);
 }
 
 
-bool LaTeXFont::providesOSF(bool ot1) const
+bool LaTeXFont::available(bool ot1)
 {
-	if (!osfpackage_.empty())
-		return LaTeXFeatures::isAvailable(to_ascii(osfpackage_));
+	if (ot1 && !ot1font_.empty())
+		return (ot1font_ == "none") ?
+			true : altFont(ot1font_).available(ot1);
+	else if (requires_.empty() && package_.empty())
+		return true;
+	else if (!requires_.empty()
+		&& LaTeXFeatures::isAvailable(to_ascii(requires_)))
+		return true;
+	else if (!package_.empty()
+		&& LaTeXFeatures::isAvailable(to_ascii(package_)))
+		return true;
+	else if (!altfonts_.empty()) {
+		for (size_t i = 0; i < altfonts_.size(); ++i) {
+			if (altFont(altfonts_[i]).available(ot1))
+				return true;
+		}
+	}
+	return false;
+}
 
-	if (ot1 && !ot1package_.empty() && ot1package_ != "none")
+
+bool LaTeXFont::providesOSF(bool ot1, bool complete)
+{
+	docstring const usedfont = getUsedFont(ot1, complete);
+
+	if (usedfont.empty())
 		return false;
-
-	if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
+	else if (usedfont != name_)
+		return altFont(usedfont).providesOSF(ot1, complete);
+	else if (!osffont_.empty())
+		return altFont(osffont_).available(ot1);
+	else if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
 		return false;
 
 	return (!osfoption_.empty() || !osfscoption_.empty());
 }
 
 
-bool LaTeXFont::providesSC(bool ot1) const
+bool LaTeXFont::providesSC(bool ot1, bool complete)
 {
-	if (ot1 && !ot1package_.empty() && ot1package_ != "none")
-		return false;
+	docstring const usedfont = getUsedFont(ot1, complete);
 
-	if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
+	if (usedfont.empty())
+		return false;
+	else if (usedfont != name_)
+		return altFont(usedfont).providesSC(ot1, complete);
+	else if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
 		return false;
 
 	return (!scoption_.empty() || !osfscoption_.empty());
 }
 
 
-bool LaTeXFont::providesScale(bool ot1) const
+bool LaTeXFont::providesScale(bool ot1, bool complete)
 {
-	if (ot1 && !ot1package_.empty() && ot1package_ != "none")
-		return false;
+	docstring const usedfont = getUsedFont(ot1, complete);
 
-	if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
+	if (usedfont.empty())
+		return false;
+	else if (usedfont != name_)
+		return altFont(usedfont).providesScale(ot1, complete);
+	else if (!package_.empty() && !LaTeXFeatures::isAvailable(to_ascii(package_)))
 		return false;
 
 	return (!scaleoption_.empty());
 }
 
-bool LaTeXFont::provides(std::string const & name) const
+bool LaTeXFont::provides(std::string const & name, bool ot1, bool complete)
 {
-	if (provides_.empty())
+	docstring const usedfont = getUsedFont(ot1, complete);
+
+	if (usedfont.empty())
 		return false;
+	else if (usedfont != name_)
+		return altFont(usedfont).provides(name, ot1, complete);
+	else if (provides_.empty())
+		return false;
+
 	for (size_t i = 0; i < provides_.size(); ++i) {
 		if (provides_[i] == name)
 			return true;
@@ -90,75 +128,91 @@ bool LaTeXFont::provides(std::string const & name) const
 }
 
 
-string const LaTeXFont::getAvailablePackage(bool dryrun, bool ot1, bool complete, bool & alt)
+docstring const LaTeXFont::getUsedFont(bool ot1, bool complete)
 {
-	if (ot1 && !ot1package_.empty()) {
-		if (ot1package_ != "none"
-		    && (LaTeXFeatures::isAvailable(to_ascii(ot1package_)) || dryrun))
-			return to_ascii(ot1package_);
-		if (!dryrun && ot1package_ != "none")
-			frontend::Alert::warning(_("Font not available"),
-					bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
-						  "is not available on your system. LyX will fall back to the default font."),
-						ot1package_, guiname_), true);
-		return string();
+	if (ot1 && !ot1font_.empty())
+		return (ot1font_ == "none") ? docstring() : ot1font_;
+	else if (family_ == "rm" && complete && !completefont_.empty()
+	         && altFont(completefont_).available(ot1))
+			return completefont_;
+	else if (switchdefault_) {
+		if (requires_.empty()
+		    || (!requires_.empty()
+		        && LaTeXFeatures::isAvailable(to_ascii(requires_))))
+			return name_;
 	}
-	if (family_ == "rm" && complete && !completepackage_.empty()) {
-		if (LaTeXFeatures::isAvailable(to_ascii(completepackage_)) || dryrun)
-			return to_ascii(completepackage_);
-	}
-	if (!package_.empty()) {
-		if (!requires_.empty() && LaTeXFeatures::isAvailable(to_ascii(requires_)))
-			return to_ascii(package_);
-		if (LaTeXFeatures::isAvailable(to_ascii(package_)))
-			return to_ascii(package_);
-		else if (!altpackages_.empty()) {
-			for (size_t i = 0; i < altpackages_.size(); ++i) {
-				if (LaTeXFeatures::isAvailable(to_ascii(altpackages_[i]))) {
-					alt = true;
-					return to_ascii(altpackages_[i]);
-				}
-			}
+	else if (!requires_.empty()
+		&& LaTeXFeatures::isAvailable(to_ascii(requires_)))
+			return name_;
+	else if (!package_.empty()
+		&& LaTeXFeatures::isAvailable(to_ascii(package_)))
+			return name_;
+	else if (!altfonts_.empty()) {
+		for (size_t i = 0; i < altfonts_.size(); ++i) {
+			LaTeXFont altf = altFont(altfonts_[i]);
+			if (altf.available(ot1))
+				return altf.getUsedFont(ot1, complete);
 		}
-		// Output unavailable packages in source preview
-		if (dryrun)
-			return to_ascii(package_);
-		docstring const req = requires_.empty() ? package_ : requires_;
-			frontend::Alert::warning(_("Font not available"),
-					bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
-						  "is not available on your system. LyX will fall back to the default font."),
-						req, guiname_), true);
 	}
+
+	return docstring();
+}
+
+
+string const LaTeXFont::getAvailablePackage(bool dryrun)
+{
+	if (package_.empty())
+		return string();
+
+	string const package = to_ascii(package_);
+	if (!requires_.empty() && LaTeXFeatures::isAvailable(to_ascii(requires_)))
+		return package;
+	else if (LaTeXFeatures::isAvailable(package))
+		return package;
+	// Output unavailable packages in source preview
+	else if (dryrun)
+		return package;
+
+	docstring const req = requires_.empty() ? package_ : requires_;
+	frontend::Alert::warning(_("Font not available"),
+			bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
+				  "is not available on your system. LyX will fall back to the default font."),
+				req, guiname_), true);
+
 	return string();
 }
 
 
-string const LaTeXFont::getPackageOptions(bool ot1, bool sc, bool osf, int scale)
+string const LaTeXFont::getPackageOptions(bool ot1, bool complete, bool sc, bool osf, int scale)
 {
-	if (ot1 && !ot1package_.empty())
-		return string();
-
 	ostringstream os;
 	bool const needosfopt = (osf != osfdefault_);
+	bool const has_osf = providesOSF(ot1, complete);
+	bool const has_sc = providesSC(ot1, complete);
+
 	if (!packageoption_.empty())
 		os << to_ascii(packageoption_);
-	if (sc && needosfopt && providesOSF() && providesSC()) {
+
+	if (sc && needosfopt && has_osf && has_sc) {
 		if (!os.str().empty())
 			os << ',';
 		if (!osfscoption_.empty())
 			os << to_ascii(osfscoption_);
 		else
-			os << to_ascii(osfoption_) << ',' << to_ascii(scoption_);
-	} else if (needosfopt && providesOSF()) {
+			os << to_ascii(osfoption_)
+			   << ',' << to_ascii(scoption_);
+	} else if (needosfopt && has_osf) {
 		if (!os.str().empty())
 			os << ',';
 		os << to_ascii(osfoption_);
-	} else if (sc && providesSC()) {
+	} else if (sc && has_sc) {
 		if (!os.str().empty())
 			os << ',';
 		os << to_ascii(scoption_);
 	}
-	if (scale != 100 && !scaleoption_.empty()) {
+
+	if (scale != 100 && !scaleoption_.empty()
+	    && providesScale(ot1, complete)) {
 		if (!os.str().empty())
 			os << ',';
 		os << subst(to_ascii(scaleoption_), "$$val",
@@ -173,6 +227,12 @@ string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool
 {
 	ostringstream os;
 
+	docstring const usedfont = getUsedFont(ot1, complete);
+	if (usedfont.empty())
+		return string();
+	else if (usedfont != name_)
+		return altFont(usedfont).getLaTeXCode(dryrun, ot1, complete, sc, osf, scale);
+
 	if (switchdefault_) {
 		if (family_.empty()) {
 			LYXERR0("Error: Font `" << name_ << "' has no family defined!");
@@ -180,25 +240,23 @@ string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool
 		}
 		if (available(ot1) || dryrun)
 			os << "\\renewcommand{\\" << to_ascii(family_) << "default}{"
-			<< to_ascii(name_) << "}\n";
+			   << to_ascii(name_) << "}\n";
 		else
 			frontend::Alert::warning(_("Font not available"),
 					bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
 						  "is not available on your system. LyX will fall back to the default font."),
 						requires_, guiname_), true);
 	} else {
-		bool alt = false;
 		string const package =
-			getAvailablePackage(dryrun, ot1, complete, alt);
-		// Package options are not for alternative packages
-		string const packageopts = alt ? string() : getPackageOptions(ot1, sc, osf, scale);
+			getAvailablePackage(dryrun);
+		string const packageopts = getPackageOptions(ot1, complete, sc, osf, scale);
 		if (packageopts.empty() && !package.empty())
 			os << "\\usepackage{" << package << "}\n";
 		else if (!packageopts.empty() && !package.empty())
 			os << "\\usepackage[" << packageopts << "]{" << package << "}\n";
 	}
-	if (osf && providesOSF(ot1) && !osfpackage_.empty())
-		os << "\\usepackage{" << to_ascii(osfpackage_) << "}\n";
+	if (osf && providesOSF(ot1, complete) && !osffont_.empty())
+		os << altFont(osffont_).getLaTeXCode(dryrun, ot1, complete, sc, osf, scale);
 
 	return os.str();
 }
@@ -207,16 +265,16 @@ string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool
 bool LaTeXFont::readFont(Lexer & lex)
 {
 	enum LaTeXFontTags {
-		LF_ALT_PACKAGES = 1,
-		LF_COMPLETE_PACKAGE,
+		LF_ALT_FONTS = 1,
+		LF_COMPLETE_FONT,
 		LF_END,
 		LF_FAMILY,
 		LF_GUINAME,
 		LF_OSFDEFAULT,
+		LF_OSFFONT,
 		LF_OSFOPTION,
-		LF_OSFPACKAGE,
 		LF_OSFSCOPTION,
-		LF_OT1_PACKAGE,
+		LF_OT1_FONT,
 		LF_PACKAGE,
 		LF_PACKAGEOPTION,
 		LF_PROVIDES,
@@ -228,16 +286,16 @@ bool LaTeXFont::readFont(Lexer & lex)
 
 	// Keep these sorted alphabetically!
 	LexerKeyword latexFontTags[] = {
-		{ "altpackages",          LF_ALT_PACKAGES },
-		{ "completepackage",      LF_COMPLETE_PACKAGE },
+		{ "altfonts",             LF_ALT_FONTS },
+		{ "completefont",         LF_COMPLETE_FONT },
 		{ "endfont",              LF_END },
 		{ "family",               LF_FAMILY },
 		{ "guiname",              LF_GUINAME },
 		{ "osfdefault",           LF_OSFDEFAULT },
+		{ "osffont",              LF_OSFFONT },
 		{ "osfoption",            LF_OSFOPTION },
-		{ "osfpackage",           LF_OSFPACKAGE },
 		{ "osfscoption",          LF_OSFSCOPTION },
-		{ "ot1package",           LF_OT1_PACKAGE },
+		{ "ot1font",              LF_OT1_FONT },
 		{ "package",              LF_PACKAGE },
 		{ "packageoption",        LF_PACKAGEOPTION },
 		{ "provides",             LF_PROVIDES },
@@ -270,14 +328,14 @@ bool LaTeXFont::readFont(Lexer & lex)
 		case LF_END: // end of structure
 			finished = true;
 			break;
-		case LF_ALT_PACKAGES: {
+		case LF_ALT_FONTS: {
 			lex.eatLine();
 			docstring altp = lex.getDocString();
-			altpackages_ = getVectorFromString(altp);
+			altfonts_ = getVectorFromString(altp);
 			break;
 		}
-		case LF_COMPLETE_PACKAGE:
-			lex >> completepackage_;
+		case LF_COMPLETE_FONT:
+			lex >> completefont_;
 			break;
 		case LF_FAMILY:
 			lex >> family_;
@@ -288,8 +346,8 @@ bool LaTeXFont::readFont(Lexer & lex)
 		case LF_OSFOPTION:
 			lex >> osfoption_;
 			break;
-		case LF_OSFPACKAGE:
-			lex >> osfpackage_;
+		case LF_OSFFONT:
+			lex >> osffont_;
 			break;
 		case LF_OSFDEFAULT:
 			lex >> osfdefault_;
@@ -297,8 +355,8 @@ bool LaTeXFont::readFont(Lexer & lex)
 		case LF_OSFSCOPTION:
 			lex >> osfscoption_;
 			break;
-		case LF_OT1_PACKAGE:
-			lex >> ot1package_;
+		case LF_OT1_FONT:
+			lex >> ot1font_;
 			break;
 		case LF_PACKAGE:
 			lex >> package_;
@@ -352,26 +410,6 @@ bool LaTeXFont::read(Lexer & lex)
 		return false;
 	}
 
-	bool available = true;
-	if (!requires_.empty())
-		available = LaTeXFeatures::isAvailable(to_ascii(requires_));
-	else if (!package_.empty()) {
-		available = LaTeXFeatures::isAvailable(to_ascii(package_));
-		if (!available && !altpackages_.empty()) {
-			for (size_t i = 0; i < altpackages_.size(); ++i) {
-				available = LaTeXFeatures::isAvailable(to_ascii(altpackages_[i]));
-				if (available)
-					break;
-			}
-		}
-	}
-	available_ = available;
-
-	if (!ot1package_.empty() && ot1package_ != "none")
-		available_ot1_ = LaTeXFeatures::isAvailable(to_ascii(ot1package_));
-	else
-		available_ot1_ = available;
-
 	return true;
 }
 
@@ -396,7 +434,8 @@ void LaTeXFonts::readLaTeXFonts()
 		default:
 			break;
 		}
-		if (lex.getString() != "Font") {
+		string const type = lex.getString();
+		if (type != "Font" && type != "AltFont") {
 			lex.printError("Unknown LaTeXFont tag `$$Token'");
 			continue;
 		}
@@ -405,7 +444,10 @@ void LaTeXFonts::readLaTeXFonts()
 		if (!lex)
 			break;
 
-		texfontmap_[f.name()] = f;
+		if (type == "AltFont")
+			texaltfontmap_[f.name()] = f;
+		else
+			texfontmap_[f.name()] = f;
 	}
 }
 
@@ -432,4 +474,18 @@ LaTeXFont LaTeXFonts::getLaTeXFont(docstring const & name)
 }
 
 
+LaTeXFont LaTeXFonts::getAltFont(docstring const & name)
+{
+	if (name == "default")
+		return LaTeXFont();
+	if (texaltfontmap_.empty())
+		readLaTeXFonts();
+	if (texaltfontmap_.find(name) == texaltfontmap_.end()) {
+		LYXERR0("LaTeXFonts::getAltFont: alternative font '" << name << "' not found!");
+		return LaTeXFont();
+	}
+	return texaltfontmap_[name];
+}
+
+
 } // namespace lyx
diff --git a/src/LaTeXFonts.h b/src/LaTeXFonts.h
index 01886be6ca..034658e8a2 100644
--- a/src/LaTeXFonts.h
+++ b/src/LaTeXFonts.h
@@ -35,14 +35,14 @@ public:
 	docstring const & family() { return family_; }
 	/// The package that provides this font
 	docstring const & package() { return package_; }
-	/// Alternative packages if package() is not available
-	std::vector<docstring> const & altpackages() { return altpackages_; }
-	/// A package that provides all families
-	docstring const & completepackage() { return completepackage_; }
-	/// A package specifically needed for OT1 font encoding
-	docstring const & ot1package() { return ot1package_; }
-	/// A package that provides Old Style Figures for this font
-	docstring const & osfpackage() { return osfpackage_; }
+	/// Alternative font if package() is not available
+	std::vector<docstring> const & altfonts() { return altfonts_; }
+	/// A font that provides all families
+	docstring const & completefont() { return completefont_; }
+	/// A font specifically needed for OT1 font encoding
+	docstring const & ot1font() { return ot1font_; }
+	/// A font that provides Old Style Figures for this type face
+	docstring const & osffont() { return osffont_; }
 	/// A package option needed to load this font
 	docstring const & packageoption() { return packageoption_; }
 	/// A package option for Old Style Figures
@@ -56,38 +56,40 @@ public:
 	/// Alternative requirement to test for
 	docstring const & requires() { return requires_; }
 	/// Does this font provide a given \p feature
-	bool provides(std::string const & name) const;
+	bool provides(std::string const & name, bool ot1, bool complete);
 	/// Issue the familydefault switch
 	bool switchdefault() const { return switchdefault_; }
 	/// Does the font provide Old Style Figures as default?
 	bool osfDefault() const { return osfdefault_; }
 	/// Is this font available?
-	bool available(bool ot1 = false) const;
+	bool available(bool ot1);
 	/// Does this font provide Old Style Figures?
-	bool providesOSF(bool ot1 = false) const;
+	bool providesOSF(bool ot1, bool complete);
 	/// Does this font provide optional true SmallCaps?
-	bool providesSC(bool ot1 = false) const;
+	bool providesSC(bool ot1, bool complete);
 	/// Does this font provide scaling?
-	bool providesScale(bool ot1 = false) const;
+	bool providesScale(bool ot1, bool complete);
 	/// Return the LaTeX Code
 	std::string const getLaTeXCode(bool dryrun, bool ot1, bool complete,
 				       bool sc, bool osf,
 				       int const & scale = 100);
+	/// Return the actually used font
+	docstring const getUsedFont(bool ot1, bool complete);
 	///
 	bool read(Lexer & lex);
 	///
 	bool readFont(Lexer & lex);
 private:
 	/// Return the preferred available package 
-	std::string const getAvailablePackage(bool dryrun,
-					      bool ot1,
-					      bool complete,
-					      bool & alt);
+	std::string const getAvailablePackage(bool dryrun);
 	/// Return the package options
 	std::string const getPackageOptions(bool ot1,
+					    bool complete,
 					    bool sc,
 					    bool osf,
 					    int scale);
+	/// Return an alternative font
+	LaTeXFont altFont(docstring const & name);
 	///
 	docstring name_;
 	///
@@ -97,13 +99,13 @@ private:
 	///
 	docstring package_;
 	///
-	std::vector<docstring> altpackages_;
+	std::vector<docstring> altfonts_;
 	///
-	docstring completepackage_;
+	docstring completefont_;
 	///
-	docstring ot1package_;
+	docstring ot1font_;
 	///
-	docstring osfpackage_;
+	docstring osffont_;
 	///
 	docstring packageoption_;
 	///
@@ -122,10 +124,6 @@ private:
 	bool osfdefault_;
 	///
 	bool switchdefault_;
-	///
-	bool available_;
-	///
-	bool available_ot1_;
 };
   
   
@@ -139,11 +137,15 @@ public:
 	TexFontMap getLaTeXFonts();
 	/// Get a specific LaTeXFont \p name
 	LaTeXFont getLaTeXFont(docstring const & name);
+	/// Get a specific AltFont \p name
+	LaTeXFont getAltFont(docstring const & name);
 private:
 	///
 	void readLaTeXFonts();
 	///
 	TexFontMap texfontmap_;
+	///
+	TexFontMap texaltfontmap_;
 };
 
 /// Implementation is in LyX.cpp
diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index 6ccc86e879..f5e96ad731 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -1832,6 +1832,15 @@ bool GuiDocument::ot1() const
 }
 
 
+bool GuiDocument::completeFontset() const
+{
+	return (fontModule->fontsSansCO->itemData(
+			fontModule->fontsSansCO->currentIndex()).toString() == "default"
+		&& fontModule->fontsSansCO->itemData(
+			fontModule->fontsSansCO->currentIndex()).toString() == "default");
+}
+
+
 void GuiDocument::updateTexFonts()
 {
 	LaTeXFonts::TexFontMap texfontmap = theLaTeXFonts().getLaTeXFonts();
@@ -3622,7 +3631,8 @@ bool GuiDocument::providesOSF(QString const & font) const
 		// FIXME: we should check if the fonts really
 		// have OSF support. But how?
 		return true;
-	return theLaTeXFonts().getLaTeXFont(qstring_to_ucs4(font)).providesOSF(ot1());
+	return theLaTeXFonts().getLaTeXFont(
+				qstring_to_ucs4(font)).providesOSF(ot1(), completeFontset());
 }
 
 
@@ -3630,7 +3640,8 @@ bool GuiDocument::providesSC(QString const & font) const
 {
 	if (fontModule->osFontsCB->isChecked())
 		return false;
-	return theLaTeXFonts().getLaTeXFont(qstring_to_ucs4(font)).providesSC(ot1());
+	return theLaTeXFonts().getLaTeXFont(
+				qstring_to_ucs4(font)).providesSC(ot1(), completeFontset());
 }
 
 
@@ -3638,7 +3649,8 @@ bool GuiDocument::providesScale(QString const & font) const
 {
 	if (fontModule->osFontsCB->isChecked())
 		return true;
-	return theLaTeXFonts().getLaTeXFont(qstring_to_ucs4(font)).providesScale(ot1());
+	return theLaTeXFonts().getLaTeXFont(
+				qstring_to_ucs4(font)).providesScale(ot1(), completeFontset());
 }
 
 
diff --git a/src/frontends/qt4/GuiDocument.h b/src/frontends/qt4/GuiDocument.h
index 24353a7678..dad82ea75c 100644
--- a/src/frontends/qt4/GuiDocument.h
+++ b/src/frontends/qt4/GuiDocument.h
@@ -250,6 +250,8 @@ private:
 	///
 	bool ot1() const;
 	///
+	bool completeFontset() const;
+	///
 	BufferParams bp_;
 	/// List of names of available modules
 	std::list<modInfoStruct> moduleNames_;