mj-single] SVG output: add xlink to href in <image>

Fixes #241

Author: pkra

lib/mj-single.js

@@ -627,7 +627,7 @@ function GetSVG(result) {
   //
   var svgdata = svg.outerHTML.replace(/><([^/])/g,">\n<$1")
                              .replace(/(<\/[a-z]*>)(?=<\/)/g,"$1\n")
-                             .replace(/(<use [^>]*)(href=)/g,' $1xlink:$2');
+                             .replace(/(<(?:use|image) [^>]*)(href=)/g,' $1xlink:$2');
   //
   //  The file version includes the xml and DOCTYPE comments
   //

test/issue241.js

@@ -0,0 +1,18 @@
+var tape = require('tape');
+var mjAPI = require("../lib/mj-single.js");
+var jsdom = require('jsdom').jsdom;
+
+tape('SVG output: add xlink to href in <image>', function(t) {
+  t.plan(1);
+  mjAPI.start();
+  var mml = '<math><mglyph src="equation.svg" width="319pt" height="14pt"></mglyph></math>';
+  var expected = /xlink:href/;
+
+  mjAPI.typeset({
+    math: mml,
+    format: "MathML",
+    svg: true
+  }, function(data) {
+    t.ok(data.svg.match(expected));
+  });
+});