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this fixes #672

This commit is contained in:
gorhill 2015-09-04 16:30:53 -04:00
parent 9c88478984
commit b3d243324f
1 changed files with 33 additions and 17 deletions
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50
src/js/contentscript-end.js
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@ -679,31 +679,47 @@ var uBlockCollapser = (function() {
// Extract all classes: these will be passed to the cosmetic filtering
// engine, and in return we will obtain only the relevant CSS selectors.
// https://github.com/gorhill/uBlock/issues/672
// http://www.w3.org/TR/2014/REC-html5-20141028/infrastructure.html#space-separated-tokens
// http://jsperf.com/enumerate-classes/6
var classesFromNodeList = function(nodes) {
if ( !nodes || !nodes.length ) {
return;
}
var qq = queriedSelectors;
var ll = lowGenericSelectors;
var node, v, vv, j;
var v, vv, len, c, beg, end;
var i = nodes.length;
while ( i-- ) {
node = nodes[i];
// http://jsperf.com/enumerate-classes
// Chromium: classList a bit faster than manually enumerating
// class names.
// Firefox: classList quite slower than manually enumerating
// class names.
vv = node.classList;
if ( typeof vv !== 'object' ) { continue; }
j = vv.length || 0;
while ( j-- ) {
v = vv[j];
if ( typeof v !== 'string' ) { continue; }
v = '.' + v;
if ( qq.hasOwnProperty(v) ) { continue; }
ll.push(v);
qq[v] = true;
vv = nodes[i].className;
if ( typeof vv !== 'string' ) { continue; }
len = vv.length;
beg = 0;
for (;;) {
// Skip whitespaces
while ( beg !== len ) {
c = vv.charCodeAt(beg);
if ( c !== 0x20 && (c > 0x0D || c < 0x09) ) { break; }
beg++;
}
if ( beg === len ) { break; }
end = beg + 1;
// Skip non-whitespaces
while ( end !== len ) {
c = vv.charCodeAt(end);
if ( c === 0x20 || (c <= 0x0D && c >= 0x09) ) { break; }
end++;
}
v = '.' + vv.slice(beg, end);
if ( qq.hasOwnProperty(v) === false ) {
ll.push(v);
qq[v] = true;
}
if ( end === len ) { break; }
beg = end + 1;
}
}
};