includes/clientside/static/sliders.js
author Dan
Fri, 05 Oct 2007 01:57:00 -0400
changeset 161 e1a22031b5bd
parent 57 b354deeaa4c4
permissions -rw-r--r--
Major revamps to the template parser. Fixed a few security holes that could allow PHP to be injected in untimely places in TPL code. Improved Ux for XSS attempt in tplWikiFormat. Documented many functions. Backported much cleaner parser from 2.0 branch. Beautified a lot of code in the depths of the template class. Pretty much a small-scale Extreme Makeover.
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// Sliding drawers on the sidebar
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// our global vars
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// the delay between the slide in/out, and a little inertia
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var sliders_initted = false;
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function initSliders()
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{
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  sliders_initted = true;
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  if ( KILL_SWITCH )
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    return false;
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    // detect whether the user has ie or not, how we get the height is different 
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    var useragent = navigator.userAgent.toLowerCase();
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    var ie = ((useragent.indexOf('msie') != -1) && (useragent.indexOf('opera') == -1) && (useragent.indexOf('webtv') == -1));
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    if(ie)
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      return;
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    var divs = getElementsByClassName(document, "div", "slideblock");
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    for(var i=0; i<divs.length; i++)
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    {
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        // set a unique id for this slider
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        divs[i].metaid = i;
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        // get the original height
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        var baseheight = (ie) ? divs[i].offsetHeight + "px" : document.defaultView.getComputedStyle(divs[i], null).getPropertyValue('height', null);
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        // use cookies to toggle whether to display it or not
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        var id = ( divs[i].parentNode.firstChild.nextSibling ) ? divs[i].parentNode.firstChild.nextSibling.firstChild : divs[i].parentNode.parentNode.firstChild.nextSibling.firstChild;
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        if(id.innerHTML || id.nextSibling.length < 1) id = id.innerHTML;
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        else id = id.nextSibling.innerHTML; // Gecko fix
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        var cookieName = 'mdgSliderState_'+i; // id.replace(' ', '_');
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        //alert(cookieName + ': ' + readCookie(cookieName));
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        if(readCookie(cookieName)=='closed')
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        {
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          divs[i].style.display = "none";
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        }
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        else
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        {
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          divs[i].style.display = "block";
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        }
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        // "save" our div height, because once it's display is set to none we can't get the original height again
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        var d = new div();
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        d.el = divs[i];
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        d.ht = baseheight.substring(0, baseheight.indexOf("p"));
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        // store our saved version
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        divheights[i] = d;        
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    }
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}
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// this is one of our divs, it just has a DOM reference to the element and the original height
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function div(_el, _ht)
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{
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    this.el = _el;
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    this.ht = _ht;
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}
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function toggle(t)
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{
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  if(IE)
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    return false;
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  if ( KILL_SWITCH )
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    return false;
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  if ( !sliders_initted )
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    initSliders();
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    // reset our inertia base and interval
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    inertiabase = inertiabaseoriginal;
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    clearInterval(slideinterval);
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    // get our block
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    block = t.parentNode.nextSibling;
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    // for mozilla, it doesn't like whitespace between elements
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    if(block.className == undefined)
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        block = t.parentNode.nextSibling.nextSibling;
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    if(block.style.display == "none")
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    {
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        block.style.display = "block";
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        block.style.height = "1px";
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        // our goal and current height
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        targetheight = divheight(block);
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        heightnow = 1;
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        // remember toggled state
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        cookieName = 'mdgSliderState_'+block.metaid; // t.innerHTML.replace(' ', '_');
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        createCookie(cookieName, 'open', 3650);
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        // our interval
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        slideinterval = setInterval(slideout, slideintervalinc);
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    }
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    else
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    {
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        // our goal and current height
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        targetheight = 1;
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        heightnow = divheight(block);
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        // remember toggled state
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        cookieName = 'mdgSliderState_'+block.metaid; // t.innerHTML.replace(' ', '_');
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        createCookie(cookieName, 'closed', 3650);
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        // our interval
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        slideinterval = setInterval(slidein, slideintervalinc);
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    }
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}
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// this is our slidein function the interval uses, it keeps subtracting
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// from the height till it's 1px then it hides it
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function slidein()
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{
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    if(heightnow > targetheight)
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    {
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        // reduce the height by intertiabase * inertiainc
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        heightnow -= inertiabase;
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        // increase the intertiabase by the amount to keep it changing
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        inertiabase += inertiainc;
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        // it's possible to exceed the height we want so we use a ternary - (condition) ? when true : when false;
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        block.style.height = (heightnow > 1) ? heightnow + "px" : targetheight + "px";
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    }
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    else
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    {
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        // finished, so hide the div properly and kill the interval
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        clearInterval(slideinterval);
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        block.style.display = "none";
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    }
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}
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// this is the function our slideout interval uses, it keeps adding
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// to the height till it's fully displayed
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function slideout()
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{
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    block.style.display = 'block';
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    if(heightnow < targetheight)
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    {
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        // increases the height by the inertia stuff
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        heightnow += inertiabase;
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        // increase the inertia stuff
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        inertiabase += inertiainc;
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        // it's possible to exceed the height we want so we use a ternary - (condition) ? when true : when false;
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        block.style.height = (heightnow < targetheight) ? heightnow + "px" : targetheight + "px";
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    }
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    else
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    {
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        // finished, so make sure the height is what it's meant to be (inertia can make it off a little)
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        // then kill the interval
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        clearInterval(slideinterval);
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        block.style.height = targetheight + "px";
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    }
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}
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// returns the height of the div from our array of such things
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function divheight(d)
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{
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    for(var i=0; i<divheights.length; i++)
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    {
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        if(divheights[i].el == d)
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        {
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            return divheights[i].ht;
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        }
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    }
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}
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/*
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    the getElementsByClassName function I pilfered from this guy.  It's
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    a useful function that'll return any/all tags with a specific css class.
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    Written by Jonathan Snook, http://www.snook.ca/jonathan
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    Add-ons by Robert Nyman, http://www.robertnyman.com
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    Modified to match all elements that match the class name plus an integer after the name
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    This is used in Enano to allow sliding sidebar widgets that use their own CSS
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*/
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function getElementsByClassName(oElm, strTagName, strClassName)
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{
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    // first it gets all of the specified tags
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    var arrElements = (strTagName == "*" && document.all) ? document.all : oElm.getElementsByTagName(strTagName);
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    // then it sets up an array that'll hold the results
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    var arrReturnElements = new Array();
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    // some regex stuff you don't need to worry about
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    strClassName = strClassName.replace(/\-/g, "\\-");
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    var oRegExp = new RegExp("(^|\\s)" + strClassName + "([0-9]*)(\\s|$)");
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    var oElement;
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    // now it iterates through the elements it grabbed above
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    for(var i=0; i<arrElements.length; i++)
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    {
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        oElement = arrElements[i];
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        // if the class matches what we're looking for it ads to the results array
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        if(oElement.className.match(oRegExp))
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        {
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            arrReturnElements.push(oElement);
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        }
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    }
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    // then it kicks the results back to us
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    return (arrReturnElements)
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}
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