// Sliding drawers on the sidebar

// our global vars

// the delay between the slide in/out, and a little inertia

var sliders_initted = false;

function initSliders()

{

  sliders_initted = true;

    // detect whether the user has ie or not, how we get the height is different 

    var useragent = navigator.userAgent.toLowerCase();

    var ie = ((useragent.indexOf('msie') != -1) && (useragent.indexOf('opera') == -1) && (useragent.indexOf('webtv') == -1));

    if(ie)

      return;

    var divs = getElementsByClassName(document, "div", "slideblock");

    for(var i=0; i<divs.length; i++)

    {

        // set a unique id for this slider

        divs[i].metaid = i;

        // get the original height

        var baseheight = (ie) ? divs[i].offsetHeight + "px" : document.defaultView.getComputedStyle(divs[i], null).getPropertyValue('height', null);

        // use cookies to toggle whether to display it or not

        var id = ( divs[i].parentNode.firstChild.nextSibling ) ? divs[i].parentNode.firstChild.nextSibling.firstChild : divs[i].parentNode.parentNode.firstChild.nextSibling.firstChild;

        if(id.innerHTML || id.nextSibling.length < 1) id = id.innerHTML;

        else id = id.nextSibling.innerHTML; // Gecko fix

        var cookieName = 'mdgSliderState_'+i; // id.replace(' ', '_');

        //alert(cookieName + ': ' + readCookie(cookieName));

        if(readCookie(cookieName)=='closed')

        {

          divs[i].style.display = "none";

        }

        else

        {

          divs[i].style.display = "block";

        }

        // "save" our div height, because once it's display is set to none we can't get the original height again

        var d = new div();

        d.el = divs[i];

        d.ht = baseheight.substring(0, baseheight.indexOf("p"));

        // store our saved version

        divheights[i] = d;        

    }

}

// this is one of our divs, it just has a DOM reference to the element and the original height

function div(_el, _ht)

{

    this.el = _el;

    this.ht = _ht;

}

function toggle(t)

{

  if(IE)

    return false;

  if ( !sliders_initted )

    initSliders();

    // reset our inertia base and interval

    inertiabase = inertiabaseoriginal;

    clearInterval(slideinterval);

    // get our block

    block = t.parentNode.nextSibling;

    // for mozilla, it doesn't like whitespace between elements

    if(block.className == undefined)

        block = t.parentNode.nextSibling.nextSibling;

    if(block.style.display == "none")

    {

        block.style.display = "block";

        block.style.height = "1px";

        // our goal and current height

        targetheight = divheight(block);

        heightnow = 1;

        // remember toggled state

        cookieName = 'mdgSliderState_'+block.metaid; // t.innerHTML.replace(' ', '_');

        createCookie(cookieName, 'open', 3650);

        // our interval

        slideinterval = setInterval(slideout, slideintervalinc);

    }

    else

    {

        // our goal and current height

        targetheight = 1;

        heightnow = divheight(block);

        // remember toggled state

        cookieName = 'mdgSliderState_'+block.metaid; // t.innerHTML.replace(' ', '_');

        createCookie(cookieName, 'closed', 3650);

        // our interval

        slideinterval = setInterval(slidein, slideintervalinc);

    }

}

// this is our slidein function the interval uses, it keeps subtracting

// from the height till it's 1px then it hides it

function slidein()

{

    if(heightnow > targetheight)

    {

        // reduce the height by intertiabase * inertiainc

        heightnow -= inertiabase;

        // increase the intertiabase by the amount to keep it changing

        inertiabase += inertiainc;

        // it's possible to exceed the height we want so we use a ternary - (condition) ? when true : when false;

        block.style.height = (heightnow > 1) ? heightnow + "px" : targetheight + "px";

    }

    else

    {

        // finished, so hide the div properly and kill the interval

        clearInterval(slideinterval);

        block.style.display = "none";

    }

}

// this is the function our slideout interval uses, it keeps adding

// to the height till it's fully displayed

function slideout()

{

    block.style.display = 'block';

    if(heightnow < targetheight)

    {

        // increases the height by the inertia stuff

        heightnow += inertiabase;

        // increase the inertia stuff

        inertiabase += inertiainc;

        // it's possible to exceed the height we want so we use a ternary - (condition) ? when true : when false;

        block.style.height = (heightnow < targetheight) ? heightnow + "px" : targetheight + "px";

    }

    else

    {

        // finished, so make sure the height is what it's meant to be (inertia can make it off a little)

        // then kill the interval

        clearInterval(slideinterval);

        block.style.height = targetheight + "px";

    }

}

// returns the height of the div from our array of such things

function divheight(d)

{

    for(var i=0; i<divheights.length; i++)

    {

        if(divheights[i].el == d)

        {

            return divheights[i].ht;

        }

    }

}

/*

    the getElementsByClassName function I pilfered from this guy.  It's

    a useful function that'll return any/all tags with a specific css class.

    Written by Jonathan Snook, http://www.snook.ca/jonathan

    Add-ons by Robert Nyman, http://www.robertnyman.com

    Modified to match all elements that match the class name plus an integer after the name

    This is used in Enano to allow sliding sidebar widgets that use their own CSS

*/

function getElementsByClassName(oElm, strTagName, strClassName)

{

    // first it gets all of the specified tags

    var arrElements = (strTagName == "*" && document.all) ? document.all : oElm.getElementsByTagName(strTagName);

    // then it sets up an array that'll hold the results

    var arrReturnElements = new Array();

    // some regex stuff you don't need to worry about

    strClassName = strClassName.replace(/\-/g, "\\-");

    var oRegExp = new RegExp("(^|\\s)" + strClassName + "([0-9]*)(\\s|$)");

    var oElement;

    // now it iterates through the elements it grabbed above

    for(var i=0; i<arrElements.length; i++)

    {

        oElement = arrElements[i];

        // if the class matches what we're looking for it ads to the results array

        if(oElement.className.match(oRegExp))

        {

            arrReturnElements.push(oElement);

        }

    }

    // then it kicks the results back to us

    return (arrReturnElements)

}