JQuery, Filter by User Selection? Range?

How can I filter my selector by what the user has selected???

I'm trying to find specific elements inside what the user has highlighted.

$('.item', document.selection) ?
$('.item', editor.getSelection().getRanges()[0]) ?

Insert selected text on the page into textarea (jQuery)

This might help. Maybe push it into a hidden element and then have jQuery reference that

Check this out, it will give you the text a user has selected (highlighted) on a page. However, this will not get the DOM structure, but merely the text.