From 0190b003b000a616a93b67cc1d01dd50dd1526e7 Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Tue, 30 Mar 2010 02:03:45 +0000
Subject: [PATCH] Fractions via HTML.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33945 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/InsetMathFrac.cpp | 16 ++++++++++++++++
 src/mathed/InsetMathFrac.h   |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/src/mathed/InsetMathFrac.cpp b/src/mathed/InsetMathFrac.cpp
index 9a244eaa34..b2ab13c9fa 100644
--- a/src/mathed/InsetMathFrac.cpp
+++ b/src/mathed/InsetMathFrac.cpp
@@ -393,6 +393,15 @@ void InsetMathFrac::mathmlize(MathStream & os) const
 }
 
 
+void InsetMathFrac::htmlize(HtmlStream & os) const
+{
+	os << MTag("span", "class='frac'")
+		 << MTag("span", "class='numer'") << cell(0) << ETag("span")
+		 << MTag("span", "class='denom'") << cell(1) << ETag("span")
+		 << ETag("span");
+}
+
+
 void InsetMathFrac::validate(LaTeXFeatures & features) const
 {
 	if (kind_ == NICEFRAC || kind_ == UNITFRAC || kind_ == UNIT)
@@ -400,6 +409,13 @@ void InsetMathFrac::validate(LaTeXFeatures & features) const
 	if (kind_ == CFRAC || kind_ == CFRACLEFT || kind_ == CFRACRIGHT
 		|| kind_ == DFRAC || kind_ == TFRAC)
 		features.require("amsmath");
+	if (features.runparams().flavor == OutputParams::HTML)
+		// CSS adapted from eLyXer
+		features.addPreambleSnippet("<style type=\"text/css\">\n"
+			"span.frac{display: inline-block; vertical-align: middle; text-align:center;}\n"
+			"span.numer{display: block;}\n"
+			"span.denom{display: block; border-top: thin solid #000040;}\n"
+			"</style>");
 	InsetMathNest::validate(features);
 }
 
diff --git a/src/mathed/InsetMathFrac.h b/src/mathed/InsetMathFrac.h
index 36e7ba363b..3de485f2db 100644
--- a/src/mathed/InsetMathFrac.h
+++ b/src/mathed/InsetMathFrac.h
@@ -84,6 +84,8 @@ public:
 	///
 	void mathmlize(MathStream &) const;
 	///
+	void htmlize(HtmlStream &) const;
+	///
 	void validate(LaTeXFeatures & features) const;
 public:
 	Inset * clone() const;