From 1eb8311aff065f843e6d34bfa7f8e2d9757eb9ce Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Wed, 31 Mar 2010 21:33:33 +0000
Subject: [PATCH] HTML for binomials.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33995 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/InsetMathFrac.cpp | 45 ++++++++++++++++++++++++++++++++----
 src/mathed/InsetMathFrac.h   |  2 ++
 2 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/src/mathed/InsetMathFrac.cpp b/src/mathed/InsetMathFrac.cpp
index 9ec6c7b086..e017b91d9a 100644
--- a/src/mathed/InsetMathFrac.cpp
+++ b/src/mathed/InsetMathFrac.cpp
@@ -578,12 +578,49 @@ void InsetMathBinom::mathmlize(MathStream & os) const
 }
 
 
+void InsetMathBinom::htmlize(HtmlStream & os) const
+{
+	char ldelim = ' ';
+	char rdelim = ' ';
+	switch (kind_) {
+	case BINOM:
+	case TBINOM:
+	case DBINOM:
+	case CHOOSE:
+		ldelim = '(';
+		rdelim = ')';
+		break;
+	case BRACE:
+		ldelim = '{';
+		rdelim = '}';
+		break;
+	case BRACK:
+		ldelim = '[';
+		rdelim = ']';
+		break;
+	}
+	os << MTag("span", "class='binomdelim'") << ldelim << ETag("span") << '\n'
+	   << MTag("span", "class='binom'") << '\n'
+	   << MTag("span") << cell(0) << ETag("span") << '\n'
+	   << MTag("span") << cell(1) << ETag("span") << '\n'
+	   << ETag("span") << '\n'
+		 << MTag("span", "class='binomdelim'") << rdelim << ETag("span") << '\n';
+}
+
+
 void InsetMathBinom::validate(LaTeXFeatures & features) const
 {
-	if (kind_ == BINOM)
-		features.require("binom");
-	if (kind_ == DBINOM || kind_ == TBINOM)
-		features.require("amsmath");
+	if (features.runparams().isLaTeX()) {
+		if (kind_ == BINOM)
+			features.require("binom");
+		if (kind_ == DBINOM || kind_ == TBINOM)
+			features.require("amsmath");
+	} else if (features.runparams().math_flavor == OutputParams::MathAsHTML)
+		features.addPreambleSnippet("<style type=\"text/css\">\n"
+			"span.binom{display: inline-block; vertical-align: bottom; text-align:center;}\n"
+			"span.binom span{display: block;}\n"
+			"span.binomdelim{font-size: 2em;}\n"
+			"</style>");
 	InsetMathNest::validate(features);
 }
 
diff --git a/src/mathed/InsetMathFrac.h b/src/mathed/InsetMathFrac.h
index 3de485f2db..5030730647 100644
--- a/src/mathed/InsetMathFrac.h
+++ b/src/mathed/InsetMathFrac.h
@@ -125,6 +125,8 @@ public:
 	///
 	void mathmlize(MathStream &) const;
 	///
+	void htmlize(HtmlStream &) const;
+	///
 	void validate(LaTeXFeatures & features) const;
 	///
 	InsetCode lyxCode() const { return MATH_FRAC_CODE; }
-- 
2.39.2