/* Horizontal Accordion script
* Created: Oct 27th, 2009. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/


var haccordion = {
    //customize loading message if accordion markup is fetched via Ajax:
    ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="ajaxloadr.gif" style="vertical-align: middle" /></div>',

    accordioninfo: {}, //class that holds config information of each haccordion instance

    expandli: function(accordionid, targetli) {
        var config = haccordion.accordioninfo[accordionid]
        var $targetli = (typeof targetli == "number") ? config.$targetlis.eq(targetli) : (typeof targetli == "string") ? jQuery('#' + targetli) : jQuery(targetli)
        if (typeof config.$lastexpanded != "undefined") //targetli may be an index, ID string, or DOM reference to LI
            config.$lastexpanded.stop().animate({ width: config.paneldimensions.peekw }, config.speed) //contract last opened content
        $targetli.stop().animate({ width: $targetli.data('hpaneloffsetw') }, config.speed) //expand current content
        config.$lastexpanded = $targetli
    },


    urlparamselect: function(accordionid) {
        var result = window.location.search.match(new RegExp(accordionid + "=(\\d+)", "i")) //check for "?accordionid=index" in URL
        if (result != null)
            result = parseInt(RegExp.$1) + "" //return value as string so 0 doesn't test for false
        return result //returns null or index, where index is the desired selected hcontent index
    },

    getCookie: function(Name) {
        var re = new RegExp(Name + "=[^;]+", "i") //construct RE to search for target name/value pair
        if (document.cookie.match(re)) //if cookie found
            return document.cookie.match(re)[0].split("=")[1] //return its value
        return null
    },

    setCookie: function(name, value) {
        document.cookie = name + "=" + value + "; path=/"
    },


    loadexternal: function($, config) { //function to fetch external page containing the entire accordion content markup
        var $hcontainer = $('#' + config.ajaxsource.container).html(this.ajaxloadingmsg)
        $.ajax({
            url: config.ajaxsource.path, //path to external content
            async: true,
            error: function(ajaxrequest) {
                $hcontainer.html('Error fetching content.<br />Server Response: ' + ajaxrequest.responseText)
            },
            success: function(content) {
                $hcontainer.html(content)
                haccordion.init($, config)
            }
        })
    },


    init: function($, config) {
        haccordion.accordioninfo[config.accordionid] = config //cache config info for this accordion
        var $targetlis = $('#' + config.accordionid).find('ul:eq(0) > li') //find top level LIs
        config.$targetlis = $targetlis
        config.selectedli = config.selectedli || [] //set default selectedli option
        config.speed = config.speed || "normal" //set default speed
        $targetlis.each(function(i) {
            var $target = $(this).data('pos', i) //give each li an index #
            $target.data('hpaneloffsetw', $target.find('.hpanel:eq(0)').outerWidth()) //get offset width of each .hpanel DIV (config.dimensions.fullw + any DIV padding)
            $target.mouseenter(function() {
                haccordion.expandli(config.accordionid, this)
                config.$lastexpanded = $(this)
            })
            if (config.collapsecurrent) { //if previous content should be contracted when expanding current
                $target.mouseleave(function() {
                    $(this).stop().animate({ width: config.paneldimensions.peekw }, config.speed) //contract previous content
                })
            }
        }) //end $targetlis.each
        var selectedli = haccordion.urlparamselect(config.accordionid) || ((config.selectedli[1] && haccordion.getCookie(config.accordionid)) ? parseInt(haccordion.getCookie(config.accordionid)) : config.selectedli[0])
        selectedli = parseInt(selectedli)
        if (selectedli >= 0 && selectedli < config.$targetlis.length) { //if selectedli index is within range
            config.$lastexpanded = $targetlis.eq(selectedli)
            config.$lastexpanded.css('width', config.$lastexpanded.data('hpaneloffsetw')) //expand selected li
        }
        $(window).bind('unload', function() { //clean up and persist on page unload
            haccordion.uninit($, config)
        }) //end window.onunload
    },

    uninit: function($, config) {
        var $targetlis = config.$targetlis
        var expandedliindex = -1 //index of expanded content to remember (-1 indicates non)
        $targetlis.each(function() {
            var $target = $(this)
            $target.unbind()
            if ($target.width() == $target.data('hpaneloffsetw'))
                expandedliindex = $target.data('pos')
        })
        if (config.selectedli[1] == true) //enable persistence?
            haccordion.setCookie(config.accordionid, expandedliindex)
    },

    setup: function(config) {
        //Use JS to write out CSS that sets up initial dimensions of each LI, for JS enabled browsers only
        document.write('<style type="text/css">\n')
        document.write('#' + config.accordionid + ' li{width: ' + config.paneldimensions.peekw + ';\nheight: ' + config.paneldimensions.h + ';\n}\n')
        document.write('#' + config.accordionid + ' li .hpanel{width: ' + config.paneldimensions.fullw + ';\nheight: ' + config.paneldimensions.h + ';\n}\n')
        document.write('<\/style>')
        jQuery(document).ready(function($) { //on Dom load
            if (config.ajaxsource) //if config.ajaxsource option defined
                haccordion.loadexternal($, config)
            else
                haccordion.init($, config)
        }) //end DOM load
    }

}