compare.js | |
|---|---|
(function ($) { | |
| See http://ejohn.org/blog/comparing-document-position/ | $.fn.compare = function (element) { //usually
try { |
| Firefox 3 throws an error with XUL - we can't use compare then | element = element.jquery ? element[0] : element;
} catch (e) {
return null;
} |
| make sure we aren't coming from XUL element | if (window.HTMLElement) {
var s = HTMLElement.prototype.toString.call(element)
if (s == '[xpconnect wrapped native prototype]' || s == '[object XULElement]' || s === '[object Window]') {
return null;
}
}
if (this[0].compareDocumentPosition) { |
| For browsers that support it, use compareDocumentPosition https://developer.mozilla.org/en/DOM/Node.compareDocumentPosition | return this[0].compareDocumentPosition(element);
} |
| this[0] contains element | if (this[0] == document && element != document) return 8;
var number = |
| this[0] contains element | (this[0] !== element && this[0].contains(element) && 16) + |
| element contains this[0] | (this[0] != element && element.contains(this[0]) && 8),
docEl = document.documentElement; |
| Use the sourceIndex | if (this[0].sourceIndex) { |
| this[0] precedes element | number += (this[0].sourceIndex < element.sourceIndex && 4) |
| element precedes foo[0] | number += (this[0].sourceIndex > element.sourceIndex && 2) |
| The nodes are in different documents | number += (this[0].ownerDocument !== element.ownerDocument || (this[0] != docEl && this[0].sourceIndex <= 0) || (element != docEl && element.sourceIndex <= 0)) && 1
}
return number;
}
return $;
})(jQuery);
|