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Make getNode() non-recursive and add comments for what it does. Issue #1447.

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Davide P. Cervone 2016-05-17 12:31:47 -04:00
parent 7116cde328
commit e1d430d1b3
1 changed files with 18 additions and 9 deletions
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27
unpacked/jax/output/CommonHTML/jax.js
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@ -337,20 +337,29 @@
setScript: HTML.setScript,
//
// Look through the children of a node for one with the given type
// but don't step into child nodes that are from MathML elements
// themselves (they will have IDs).
// Look through the direct children of a node for one with the given
// type (but if the node has intervening containers for its children,
// step into them; note that elements corresponding to MathML nodes
// will have id's so we don't step into them).
//
// This is used by munderover and msubsup to locate their child elements
// when they are part of an embellished operator that is being stretched.
// We don't use querySelector because we want to find only the direct child
// nodes, not nodes that might be nested deeper in the tree (see issue #1447).
//
getNode: function (node,type) {
var name = RegExp("\\b"+type+"\\b");
for (var i = 0, m = node.childNodes.length; i < m; i++) {
var child = node.childNodes[i];
if (name.test(child.className)) return child;
if (child.id == null) return this.getNode(child,type);
while (node && node.childNodes.length === 1 && node.firstChild.id == null)
node = node.firstChild;
if (node) {
var name = RegExp("\\b"+type+"\\b");
for (var i = 0, m = node.childNodes.length; i < m; i++) {
var child = node.childNodes[i];
if (name.test(child.className)) return child;
}
}
return null;
},
/********************************************/
preTranslate: function (state) {