Add suggested result to jQuery UI autocomplete input?

I am attempting to expand the jQuery UI autocomplete to resemble that of Google's search field, where the remaining text in the top suggested result (i.e. anything that's not the request.t开发者_如何转开发erm), is added to the end of the user entered string in a different color.

I had planned to do this by placing an identically sized transparent div behind the original input using relative positioning, and the top matched result placed in this div in a lighter color.

My question is, the correct way to access the matched results array. My approach being as follows (streamlined example):

$(function() {
    var tags = [
        "One",
        "Two",
        "Three"
    ];
    $("input").autocomplete({
        source: tags,
        open: function() {
            // var topResult = HOW TO ACCESS?
            $('#divForText').text(topResult);
        }
    });
});

Can anyone clarify how to access the first value in the matched results array?

---

Here's one way you could accomplish this:

$("input").autocomplete({
    source: function(request, response) {
        var filtered = $.ui.autocomplete.filter(tags, request.term)
            , first = filtered.length ? filtered[0] : null;

        if (first) {
            $("#divForText").text(first);
        } else {
            $("#divForText").empty();
        }

        response($.ui.autocomplete.filter(langs, request.term));
    }
});

Basically, this is using the version of source that takes a function as a parameter. That function simply uses the filter method that autocomplete uses internally, and then updates the content.

Here's a working example: http://jsfiddle.net/UGsHR/75/