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Merge pull request #1475 from dpvc/issue1474

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Avoid error when \overset or \underset is empty.  Resolves issue #1474.
This commit is contained in:
Davide P. Cervone 2016-05-17 11:26:36 -04:00
commit c0c63b1e12
1 changed files with 8 additions and 4 deletions
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12
unpacked/jax/output/PreviewHTML/jax.js
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@ -767,8 +767,10 @@
bbox = this.PHTMLbboxFor(this.base),
BBOX = this.PHTML, acc = obox.acc;
if (this.data[this.over]) {
span.lastChild.firstChild.style.marginLeft = obox.l =
span.lastChild.firstChild.style.marginRight = obox.r = 0;
if (span.lastChild.firstChild){
span.lastChild.firstChild.style.marginLeft = obox.l =
span.lastChild.firstChild.style.marginRight = obox.r = 0;
}
var over = HTML.Element("span",{},[["span",{className:"MJXp-over"}]]);
over.firstChild.appendChild(span.lastChild);
if (span.childNodes.length > (this.data[this.under] ? 1 : 0))
@ -786,8 +788,10 @@
else {span.appendChild(over)}
}
if (this.data[this.under]) {
span.lastChild.firstChild.style.marginLeft = ubox.l =
span.lastChild.firstChild.marginRight = ubox.r = 0;
if (span.lastChild.firstChild) {
span.lastChild.firstChild.style.marginLeft = ubox.l =
span.lastChild.firstChild.marginRight = ubox.r = 0;
}
this.data[this.under].PHTMLhandleScriptlevel(span.lastChild);
}
BBOX.w = Math.max(.8*obox.w,.8*ubox.w,bbox.w);