List-Expander-Prototype_jquery

// TBLOP V3 List Expander Prototype
// Grows list height (increasing number of visible links) when hovering
// after list grows to ~90% of window height, will scroll window to make list full window height
// huge improvement on the previous version thats been on tblop for years
tblop.currently = {}
tblop.currently.hoveringList = false;
tblop.currently.startingHeight = 256;
$("div.a_list").hover(
    function () {

        if (!viewingMobile && !tblop.currently.hoveringList) {
            tblop.currently.hoverStartingTime=Date.now();
            tblop.currently.startingHeight = $(this).children("div.list_contents").css('max-height').replace('px', '');
            // this get the total height viewable, not the TOTAL height of the hidden parts
            tblop.currently.totalHeight = $(this).children("div.list_contents").height();
            // each link is 17 pixels high, so multiply the number of links by 17 to get the TOTAL list height.
            tblop.currently.completeHeight = 17 * $(this).children("div.list_contents").children("a").length;
            tblop.currently.heightLeft = tblop.currently.completeHeight - tblop.currently.totalHeight;
            tblop.that = this;
            tblop.listGrowTimer = setInterval(function () {
                var listHeight = $(tblop.that).children("div.list_contents").height();
                // increase max list height by 1 pixel every half second

                // wamt tp grpw the list at a percentage of current height rate.
                tblop.currently.heightLeft = tblop.currently.completeHeight - listHeight;
                var heightToAdd = (tblop.currently.heightLeft / 8.5);
                if (tblop.currently.heightLeft < 10) {

                    heightToAdd = 1;
                }
                if (heightToAdd > 8.5) {
                    heightToAdd = 8.5;
                }
                if (listHeight > document.body.clientHeight * 0.9) {
                    heightToAdd = 0;
                    $(tblop.that).children("div.list_contents").css('max-height', (document.body.clientHeight - 96) + 'px');
                    listHeight = $(tblop.that).children("div.list_contents").height();
                    window.scrollTo(0, $(tblop.that).offset().top);
                    clearInterval(tblop.listGrowTimer);
                    tblop.listGrowTimer = null;
                }
                if (Date.now()-tblop.currently.hoverStartingTime>1600){
                    listHeight += heightToAdd;
                    //console.log(tblop.currently.heightLeft);
                    $(tblop.that).children("div.list_contents").css('max-height', listHeight + 'px');

                }
            }, 67)
            tblop.currently.hoveringList = true;


        }
    },
    function () {
        if (!viewingMobile) {
            tblop.that = this;
            $(tblop.that).children("div.list_contents").css('max-height', tblop.currently.startingHeight + 'px');

            clearInterval(tblop.listGrowTimer);
            tblop.listGrowTimer = null;
            tblop.currently.hoveringList = false;
        }
    }
);