Switch to using createRange for element comparision instead of Array indexOf checks...

diff --git a/src/selector.js b/src/selector.js
index 6538d97..3e1d711 100644 (file)
--- a/src/selector.js
+++ b/src/selector.js
@@ -692,20 +692,22 @@ if ( document.documentElement.compareDocumentPosition ) {
                }
                return ret;
        };
-} else if ( Array.prototype.indexOf ) {
-       var indexOf = Array.prototype.indexOf,
-               allSort = document.getElementsByTagName("*");
-
+} else if ( "sourceIndex" in document.documentElement ) {
        sortOrder = function( a, b ) {
-               var ret = indexOf.call( allSort, a ) - indexOf.call( allSort, b );
+               var ret = a.sourceIndex - b.sourceIndex;
                if ( ret === 0 ) {
                        hasDuplicate = true;
                }
                return ret;
        };
-} else if ( "sourceIndex" in document.documentElement ) {
+} else if ( document.createRange ) {
        sortOrder = function( a, b ) {
-               var ret = a.sourceIndex - b.sourceIndex;
+               var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();
+               aRange.selectNode(a);
+               aRange.collapse(true);
+               bRange.selectNode(b);
+               bRange.collapse(true);
+               var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);
                if ( ret === 0 ) {
                        hasDuplicate = true;
                }