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commit 4f40c0eed61c2b7500ffb261fb9bd312f8973360
parent 6f679216e25141a1e180d3a818f396e6399348da
Author: Davide P. Cervone <dpvc@union.edu>
Date:   Wed,  1 May 2013 13:21:10 -0400

Fix some crashes when elements are missing their children.

Diffstat:
M
unpacked/jax/output/SVG/jax.js
 | 
9
+++++++--

1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/unpacked/jax/output/SVG/jax.js b/unpacked/jax/output/SVG/jax.js
@@ -1013,8 +1013,13 @@
 	return svg;
       },
       
+      SVGchildSVG: function (i) {
+        return (this.data[i] ? this.data[i].toSVG() : BBOX());
+      },
+      
       SVGdataStretched: function (i,HW,D) {
         this.SVGdata = {HW:HW, D:D};
+        if (!this.data[i]) {return BBOX()}
         if (D  != null) {return this.data[i].SVGstretchV(HW,D)}
         if (HW != null) {return this.data[i].SVGstretchH(HW)}
         return this.data[i].toSVG();
@@ -1599,7 +1604,7 @@
       toSVG: function () {
         this.SVGgetStyles();
         var svg = this.SVG(); this.SVGhandleSpace(svg);
-        var num = this.data[0].toSVG(), den = this.data[1].toSVG();
+        var num = this.SVGchildSVG(0), den = this.SVGchildSVG(1);
 	var values = this.getValues("displaystyle","linethickness","numalign","denomalign","bevelled");
 	var scale = svg.scale = this.SVGgetScale(), isDisplay = values.displaystyle;
 	var a = SVG.TeX.axis_height * scale;
@@ -1649,7 +1654,7 @@
       toSVG: function () {
         this.SVGgetStyles();
         var svg = this.SVG(); this.SVGhandleSpace(svg);
-	var base = this.data[0].toSVG(), rule, surd;
+	var base = this.SVGchildSVG(0), rule, surd;
 	var scale = this.SVGgetScale();
 	var t = SVG.TeX.rule_thickness * scale, p,q, H, x = 0;
 	if (this.Get("displaystyle")) {p = SVG.TeX.x_height * scale} else {p = t}