Fix bug #6469: Times Roman and \textgreek produce error with pdflatex on a PC

The problem here is that the metafont sources and tfm files are missing
in normal installations, because the Times Roman Greek fonts are not free
and should be purchased. When the grtimes package is not installed, the
fonts are substitued with cmr glyphs. However, if grtimes is installed
and and the actual fonts are missing, an error is generated. So, we simply
check whether the greek fonts are installed and, if they are not, we
perform the font substitution by ourselves. In this way the error is
avoided whether grtimes is installed or not.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@33372 a592a061-630c-0410-9148-cb99ea01b6c8

src/LaTeXFeatures.cpp

@@ -741,8 +741,17 @@ string const LaTeXFeatures::getMacros() const
 	if (mustProvide("lyxarrow"))
 		macros << lyxarrow_def << '\n';
 
-	if (mustProvide("textgreek"))
-		macros << textgreek_def << '\n';
+	if (mustProvide("textgreek")) {
+		// Avoid a LaTeX error if times fonts are used and the grtimes
+		// package is installed but actual fonts are not (bug 6469).
+		if (params_.fontsRoman == "times")
+			macros << subst(textgreek_def, "\\greektext #1",
+					"%\n  \\IfFileExists{grtm10.tfm}{}"
+					"{\\fontfamily{cmr}}\\greektext #1")
+			       << '\n';
+		else
+			macros << textgreek_def << '\n';
+	}
 
 	if (mustProvide("textcyr"))
 		macros << textcyr_def << '\n';

status.16x

@@ -105,6 +105,9 @@ What's new
 
 - Do not insert \foreignlanguage in ERTs (bug 6426).
 
+- Allow using greek symbols also when the package grtimes is installed but
+  actual fonts are not and "Times Roman" glyphs are requested (bug 6469).
+
 - Reset the language at the end of the document to the correct
   language (bug 6387).