if ( typeof t != "string" )
return [ t ];
- // Make sure that the context is a DOM Element
- if ( context && !context.nodeType )
- context = null;
+ // check to make sure context is a DOM element or a document
+ if ( context && context.nodeType != 1 && context.nodeType != 9)
+ return [ ];
// Set the correct context (if none is provided)
context = context || document;
// Initialize the search
- var ret = [context], done = [], last;
+ var ret = [context], done = [], last, nodeName;
// Continue while a selector expression exists, and while
// we're no longer looping upon ourselves
var m = re.exec(t);
if ( m ) {
- var nodeName = m[1];
+ nodeName = m[1].toUpperCase();
// Perform our own iteration and filter
for ( var i = 0; ret[i]; i++ )
for ( var c = ret[i].firstChild; c; c = c.nextSibling )
- if ( c.nodeType == 1 && (nodeName == "*" || jQuery.nodeName(c, nodeName)) )
+ if ( c.nodeType == 1 && (nodeName == "*" || c.nodeName.toUpperCase() == nodeName) )
r.push( c );
ret = r;
if ( (m = re.exec(t)) != null ) {
r = [];
- var nodeName = m[2], merge = {};
+ var merge = {};
+ nodeName = m[2].toUpperCase();
m = m[1];
for ( var j = 0, rl = ret.length; j < rl; j++ ) {
if ( m == "~" && merge[id] ) break;
- if (!nodeName || jQuery.nodeName(n, nodeName)) {
+ if (!nodeName || n.nodeName.toUpperCase() == nodeName ) {
if ( m == "~" ) merge[id] = true;
r.push( n );
}
// :not() is a special case that can be optimized by
// keeping it out of the expression list
if ( m[1] == ":" && m[2] == "not" )
- r = jQuery.filter(m[3], r, true).r;
+ // optimize if only one selector found (most common case)
+ r = isSimple.test( m[3] ) ?
+ jQuery.filter(m[3], r, true).r :
+ jQuery( r ).not( m[3] );
// We can get a big speed boost by filtering by class here
else if ( m[1] == "." )
return r;
}
});
+