Preamble tag for LaTeXFonts (#8530)

lib/latexfonts

@@ -22,6 +22,9 @@
 #	OsfScOption        <option for combined osf and true smallcaps support>
 #	ScaleOption        <option for font scaling>
 #	Provides           <features provided by the font packages (comma-separated)>
+#	Preamble
+#	  <some arbitrary LaTeX code to be issued in the preamble>
+#	EndPreamble
 # EndFont
 #
 #
@@ -53,8 +56,8 @@
 #   The value "none" tells LyX not to load any font in OT1 encoding.
 #   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").
+#   both sf and tt are set to "default" (this allows for instance 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
@@ -65,9 +68,12 @@
 #   default and provide an option for lining figures. Pass this option
 #   to OsfOption.
 # * ScaleOption supports the placeholder $$val for the scale value.
+# * The Preamble code is output immediately after the respective font
+#   loading command.
 #
 ##########################################################################
 
+
 #
 # ROMAN FONTS
 #

src/LaTeXFonts.cpp

@@ -275,6 +275,9 @@ string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool
 	if (osf && providesOSF(ot1, complete, nomath) && !osffont_.empty())
 		os << altFont(osffont_).getLaTeXCode(dryrun, ot1, complete, sc, osf, nomath, scale);
 
+	if (!preamble_.empty())
+		os << preamble_;
+
 	return os.str();
 }
 
@@ -295,6 +298,7 @@ bool LaTeXFont::readFont(Lexer & lex)
 		LF_OT1_FONT,
 		LF_PACKAGE,
 		LF_PACKAGEOPTION,
+		LF_PREAMBLE,
 		LF_PROVIDES,
 		LF_REQUIRES,
 		LF_SCALEOPTION,
@@ -317,6 +321,7 @@ bool LaTeXFont::readFont(Lexer & lex)
 		{ "ot1font",              LF_OT1_FONT },
 		{ "package",              LF_PACKAGE },
 		{ "packageoption",        LF_PACKAGEOPTION },
+		{ "preamble",             LF_PREAMBLE },
 		{ "provides",             LF_PROVIDES },
 		{ "requires",             LF_REQUIRES },
 		{ "scaleoption",          LF_SCALEOPTION },
@@ -386,6 +391,9 @@ bool LaTeXFont::readFont(Lexer & lex)
 		case LF_PACKAGEOPTION:
 			lex >> packageoption_;
 			break;
+		case LF_PREAMBLE:
+			preamble_ = lex.getLongString("EndPreamble");
+			break;
 		case LF_PROVIDES: {
 			lex.eatLine();
 			string features = lex.getString();

src/LaTeXFonts.h

@@ -127,6 +127,8 @@ private:
 	///
 	docstring requires_;
 	///
+	std::string preamble_;
+	///
 	bool osfdefault_;
 	///
 	bool switchdefault_;