/* Ultimate Fade-in slideshow (v2.4)
* Last updated: May 24th, 2010. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize
//May 24th, 10' (v2.4): Adds new "peakaboo" option to "descreveal" setting. oninit and onslide event handlers added.

var fadeSlideShow_descpanel = {
    controls: [['x.png', 7, 7], ['restore.png', 10, 11], ['loading.gif', 54, 55]], //full URL and dimensions of close, restore, and loading images
    fontStyle: 'normal 11px Verdana', //font style for text descriptions
    slidespeed: 200 //speed of description panel animation (in millisec)
}

//No need to edit beyond here...

jQuery.noConflict()

function fadeSlideShow(settingarg) {
    this.setting = settingarg
    settingarg = null
    var setting = this.setting
    setting.fadeduration = setting.fadeduration ? parseInt(setting.fadeduration) : 500
    setting.curimage = (setting.persist) ? fadeSlideShow.routines.getCookie("gallery-" + setting.wrapperid) : 0
    setting.curimage = setting.curimage || 0 //account for curimage being null if cookie is empty
    setting.currentstep = 0 //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
    setting.totalsteps = setting.imagearray.length * (setting.displaymode.cycles > 0 ? setting.displaymode.cycles : Infinity) //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
    setting.fglayer = 0, setting.bglayer = 1 //index of active and background layer (switches after each change of slide)
    setting.oninit = setting.oninit || function() { }
    setting.onslide = setting.onslide || function() { }
    if (setting.displaymode.randomize) //randomly shuffle order of images?
        setting.imagearray.sort(function() { return 0.5 - Math.random() })
    var preloadimages = [] //preload images
    setting.longestdesc = "" //get longest description of all slides. If no desciptions defined, variable contains ""
    for (var i = 0; i < setting.imagearray.length; i++) { //preload images
        preloadimages[i] = new Image()
        preloadimages[i].src = setting.imagearray[i][0]
        if (setting.imagearray[i][3] && setting.imagearray[i][3].length > setting.longestdesc.length)
            setting.longestdesc = setting.imagearray[i][3]
    }
    var closebutt = fadeSlideShow_descpanel.controls[0] //add close button to "desc" panel if descreveal="always"
    setting.closebutton = (setting.descreveal == "always") ? '<img class="close" src="' + closebutt[0] + '" style="float:right;cursor:hand;cursor:pointer;width:' + closebutt[1] + 'px;height:' + closebutt[2] + 'px;margin-left:2px" title="Hide Description" />' : ''
    var slideshow = this
    jQuery(document).ready(function($) { //fire on DOM ready
        var setting = slideshow.setting
        var fullhtml = fadeSlideShow.routines.getFullHTML(setting.imagearray) //get full HTML of entire slideshow
        setting.$wrapperdiv = $('#' + setting.wrapperid).css({ position: 'relative', visibility: 'visible', background: 'black', overflow: 'hidden', width: setting.dimensions[0], height: setting.dimensions[1] }).empty() //main slideshow DIV
        if (setting.$wrapperdiv.length == 0) { //if no wrapper DIV found
            alert("Error: DIV with ID \"" + setting.wrapperid + "\" not found on page.")
            return
        }
        setting.$gallerylayers = $('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 
			.css({ position: 'absolute', left: 0, top: 0, width: '100%', height: '100%', background: 'black' })
			.appendTo(setting.$wrapperdiv)
        var $loadingimg = $('<img src="' + fadeSlideShow_descpanel.controls[2][0] + '" style="position:absolute;width:' + fadeSlideShow_descpanel.controls[2][1] + ';height:' + fadeSlideShow_descpanel.controls[2][2] + '" />')
			.css({ left: setting.dimensions[0] / 2 - fadeSlideShow_descpanel.controls[2][1] / 2, top: setting.dimensions[1] / 2 - fadeSlideShow_descpanel.controls[2][2] }) //center loading gif
			.appendTo(setting.$wrapperdiv)
        var $curimage = setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage) //prefill both layers with entire slideshow content, hide all images, and return current image
        if (setting.longestdesc != "" && setting.descreveal != "none") { //if at least one slide contains a description (versus feature is enabled but no descriptions defined) and descreveal not explicitly disabled
            fadeSlideShow.routines.adddescpanel($, setting)
            if (setting.descreveal == "always") { //position desc panel so it's visible to begin with
                setting.$descpanel.css({ top: setting.dimensions[1] - setting.panelheight })
                setting.$descinner.click(function(e) { //asign click behavior to "close" icon
                    if (e.target.className == "close") {
                        slideshow.showhidedescpanel('hide')
                    }
                })
                setting.$restorebutton.click(function(e) { //asign click behavior to "restore" icon
                    slideshow.showhidedescpanel('show')
                    $(this).css({ visibility: 'hidden' })
                })
            }
            else if (setting.descreveal == "ondemand") { //display desc panel on demand (mouseover)
                setting.$wrapperdiv.bind('mouseenter', function() { slideshow.showhidedescpanel('show') })
                setting.$wrapperdiv.bind('mouseleave', function() { slideshow.showhidedescpanel('hide') })
            }
        }
        setting.$wrapperdiv.bind('mouseenter', function() { setting.ismouseover = true }) //pause slideshow mouseover
        setting.$wrapperdiv.bind('mouseleave', function() { setting.ismouseover = false })
        if ($curimage.get(0).complete) { //accounf for IE not firing image.onload
            $loadingimg.hide()
            slideshow.paginateinit($)
            slideshow.showslide(setting.curimage)
        }
        else { //initialize slideshow when first image has fully loaded
            $loadingimg.hide()
            slideshow.paginateinit($)
            $curimage.bind('load', function() { slideshow.showslide(setting.curimage) })
        }
        setting.oninit.call(slideshow) //trigger oninit() event
        $(window).bind('unload', function() { //clean up and persist
            if (slideshow.setting.persist) //remember last shown image's index
                fadeSlideShow.routines.setCookie("gallery-" + setting.wrapperid, setting.curimage)
            jQuery.each(slideshow.setting, function(k) {
                if (slideshow.setting[k] instanceof Array) {
                    for (var i = 0; i < slideshow.setting[k].length; i++) {
                        if (slideshow.setting[k][i].tagName == "DIV") //catches 2 gallerylayer divs, gallerystatus div
                            slideshow.setting[k][i].innerHTML = null
                        slideshow.setting[k][i] = null
                    }
                }
            })
            slideshow = slideshow.setting = null
        })
    })
}

fadeSlideShow.prototype = {

    navigate: function(keyword) {
        var setting = this.setting
        clearTimeout(setting.playtimer)
        if (setting.displaymode.type == "auto") { //in auto mode
            setting.displaymode.type = "manual" //switch to "manual" mode when nav buttons are clicked on
            setting.displaymode.wraparound = true //set wraparound option to true
        }
        if (!isNaN(parseInt(keyword))) { //go to specific slide?
            this.showslide(parseInt(keyword))
        }
        else if (/(prev)|(next)/i.test(keyword)) { //go back or forth inside slide?
            this.showslide(keyword.toLowerCase())
        }
    },

    showslide: function(keyword) {
        var slideshow = this
        var setting = slideshow.setting
        if (setting.displaymode.type == "auto" && setting.ismouseover && setting.currentstep <= setting.totalsteps) { //if slideshow in autoplay mode and mouse is over it, pause it
            setting.playtimer = setTimeout(function() { slideshow.showslide('next') }, setting.displaymode.pause)
            return
        }
        var totalimages = setting.imagearray.length
        var imgindex = (keyword == "next") ? (setting.curimage < totalimages - 1 ? setting.curimage + 1 : 0)
			: (keyword == "prev") ? (setting.curimage > 0 ? setting.curimage - 1 : totalimages - 1)
			: Math.min(keyword, totalimages - 1)
        var $slideimage = setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show() //hide all images except current one
        var imgdimensions = [$slideimage.width(), $slideimage.height()] //center align image
        $slideimage.css({ marginLeft: (imgdimensions[0] > 0 && imgdimensions[0] < setting.dimensions[0]) ? setting.dimensions[0] / 2 - imgdimensions[0] / 2 : 0 })
        $slideimage.css({ marginTop: (imgdimensions[1] > 0 && imgdimensions[1] < setting.dimensions[1]) ? setting.dimensions[1] / 2 - imgdimensions[1] / 2 : 0 })
        if (setting.descreveal == "peekaboo" && setting.longestdesc != "") { //if descreveal is set to "peekaboo", make sure description panel is hidden before next slide is shown
            clearTimeout(setting.hidedesctimer) //clear hide desc panel timer
            slideshow.showhidedescpanel('hide', 0) //and hide it immediately
        }
        setting.$gallerylayers.eq(setting.bglayer).css({ zIndex: 90, opacity: 0 }) //background layer becomes foreground
			.stop().css({ opacity: 0 }).animate({ opacity: 1 }, setting.fadeduration, function() { //Callback function after fade animation is complete:
			    clearTimeout(setting.playtimer)
			    try {
			        setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
			    } catch (e) {
			        alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: " + e)
			    }
			    if (setting.descreveal == "peekaboo" && setting.longestdesc != "") {
			        slideshow.showhidedescpanel('show')
			        setting.hidedesctimer = setTimeout(function() { slideshow.showhidedescpanel('hide') }, setting.displaymode.pause - fadeSlideShow_descpanel.slidespeed)
			    }
			    setting.currentstep += 1
			    if (setting.displaymode.type == "auto") {
			        if (setting.currentstep <= setting.totalsteps || setting.displaymode.cycles == 0)
			            setting.playtimer = setTimeout(function() { slideshow.showslide('next') }, setting.displaymode.pause)
			    }
			}) //end callback function
        setting.$gallerylayers.eq(setting.fglayer).css({ zIndex: 89 }) //foreground layer becomes background
        setting.fglayer = setting.bglayer
        setting.bglayer = (setting.bglayer == 0) ? 1 : 0
        setting.curimage = imgindex
        if (setting.$descpanel) {
            setting.$descpanel.css({ visibility: (setting.imagearray[imgindex][3]) ? 'visible' : 'hidden' })
            if (setting.imagearray[imgindex][3]) //if this slide contains a description
                setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3])
        }
        if (setting.displaymode.type == "manual" && !setting.displaymode.wraparound) {
            this.paginatecontrol()
        }
        if (setting.$status) //if status container defined
            setting.$status.html(setting.curimage + 1 + "/" + totalimages)
    },

    showhidedescpanel: function(state, animateduration) {
        var setting = this.setting
        var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1]
        setting.$descpanel.stop().animate({ top: endpoint }, (typeof animateduration != "undefined" ? animateduration : fadeSlideShow_descpanel.slidespeed), function() {
            if (setting.descreveal == "always" && state == "hide")
                setting.$restorebutton.css({ visibility: 'visible' }) //show restore button
        })
    },

    paginateinit: function($) {
        var slideshow = this
        var setting = this.setting
        if (setting.togglerid) { //if toggler div defined
            setting.$togglerdiv = $("#" + setting.togglerid)
            setting.$prev = setting.$togglerdiv.find('.prev').data('action', 'prev')
            setting.$next = setting.$togglerdiv.find('.next').data('action', 'next')
            setting.$prev.add(setting.$next).click(function(e) { //assign click behavior to prev and next controls
                var $target = $(this)
                slideshow.navigate($target.data('action'))
                e.preventDefault()
            })
            setting.$status = setting.$togglerdiv.find('.status')
        }
    },

    paginatecontrol: function() {
        var setting = this.setting
        setting.$prev.css({ opacity: (setting.curimage == 0) ? 0.4 : 1 }).data('action', (setting.curimage == 0) ? 'none' : 'prev')
        setting.$next.css({ opacity: (setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1 }).data('action', (setting.curimage == setting.imagearray.length - 1) ? 'none' : 'next')
        if (document.documentMode == 8) { //in IE8 standards mode, apply opacity to inner image of link
            setting.$prev.find('img:eq(0)').css({ opacity: (setting.curimage == 0) ? 0.4 : 1 })
            setting.$next.find('img:eq(0)').css({ opacity: (setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1 })
        }
    }


}

fadeSlideShow.routines = {

    getSlideHTML: function(imgelement) {
        var layerHTML = (imgelement[1]) ? '<a href="' + imgelement[1] + '" target="' + imgelement[2] + '">\n' : '' //hyperlink slide?
        layerHTML += '<img src="' + imgelement[0] + '" style="border-width:0;" />\n'
        layerHTML += (imgelement[1]) ? '</a>\n' : ''
        return layerHTML //return HTML for this layer
    },

    getFullHTML: function(imagearray) {
        var preloadhtml = ''
        for (var i = 0; i < imagearray.length; i++)
            preloadhtml += this.getSlideHTML(imagearray[i])
        return preloadhtml
    },

    adddescpanel: function($, setting) {
        setting.$descpanel = $('<div class="fadeslidedescdiv"></div>')
			.css({ position: 'absolute', visibility: 'hidden', width: '100%', left: 0, top: setting.dimensions[1], font: fadeSlideShow_descpanel.fontStyle, zIndex: '91' })
			.appendTo(setting.$wrapperdiv)
        $('<div class="descpanelbg"></div><div class="descpanelfg"></div>') //create inner nav panel DIVs
			.css({ position: 'absolute', left: 0, top: 0, width: setting.$descpanel.width() - 8, padding: '4px' })
			.eq(0).css({ background: 'black', opacity: 0.7 }).end() //"descpanelbg" div
			.eq(1).css({ color: 'white' }).html(setting.closebutton + setting.longestdesc).end() //"descpanelfg" div
			.appendTo(setting.$descpanel)
        setting.$descinner = setting.$descpanel.find('div.descpanelfg')
        setting.panelheight = setting.$descinner.outerHeight()
        setting.$descpanel.css({ height: setting.panelheight }).find('div').css({ height: '100%' })
        if (setting.descreveal == "always") { //create restore button
            setting.$restorebutton = $('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] + '" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:92;width:' + fadeSlideShow_descpanel.controls[1][1] + 'px;height:' + fadeSlideShow_descpanel.controls[1][2] + 'px;cursor:pointer;cursor:hand" />')
				.appendTo(setting.$wrapperdiv)


        }
    },


    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=/"
    }
}