// -----------------------------------------------------------------------------------
//
//	Lightboxdiv v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//	3/31/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightboxdiv2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

	Table of Contents
	-----------------
	Configuration
	Global Variables
	Extending Built-in Objects

	- Object.extend(Element)
	- Array.prototype.removeDuplicates()
	- Array.prototype.empty()

	Lightboxdiv Class Declaration
	- initialize()
	- start()
	- changeImage()
	- resizeImageContainer()
	- showImage()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()

	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- pause()
	- initLightboxdiv()

	Function Calls
	- addLoadEvent(initLightboxdiv)

*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "../images/loading.gif";
var fileBottomNavCloseImage = "../images/closelabel.gif";
var browserCheck = (document.all) ? 1 : 0; // ternary operator statements to check if IE. set 1 if is, set 0 if not.
var resizeSpeed = 7;	// controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 10;	//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;

if (resizeSpeed > 10) {
    resizeSpeed = 10;
}
if (resizeSpeed < 1) {
    resizeSpeed = 1;
}
resizeDuration = (11 - resizeSpeed) * 0.15;

// -----------------------------------------------------------------------------------

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
    getWidth: function(element) {
        element = $(element);
        return element.offsetWidth;
    },
    setWidth: function(element, w) {
        element = $(element);
        element.style.width = w + "px";
    },
    setHeight: function(element, h) {
        element = $(element);
        element.style.height = h + "px";
    },
    setTop: function(element, t) {
        element = $(element);
        element.style.top = t + "px";
//        "100px";
    },
    //	setTop: function(element,t) {
    //	   	element = $(element);
    //    	element.style.top = t +"px";
    //	},
    setSrc: function(element, src) {
        element = $(element);
        element.src = src;
    },
    setHref: function(element, href) {
        element = $(element);
        element.href = href;
    },
    setInnerHTML: function(element, content) {
        element = $(element);
        element.innerHTML = content;
    }
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for (i = 1; i < this.length; i++) {
        if (this[i][0] == this[i - 1][0]) {
            this.splice(i, 1);
        }
    }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
    for (i = 0; i <= this.length; i++) {
        this.shift();
    }
}

// -----------------------------------------------------------------------------------

//
//	Lightboxdiv Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightboxdiv = Class.create();

Lightboxdiv.prototype = {


    // initialize()
    // Constructor runs on completion of the DOM loading. Loops through anchor tags looking for
    // 'lightboxdiv' references and applies onclick events to appropriate links. The 2nd section of
    // the function inserts html at the bottom of the page which is used to display the shadow
    // overlay and the image container.
    //
    initialize: function() {
        if (!document.getElementsByTagName) {
            return;
        }
        var anchors = document.getElementsByTagName('a');

		// loop through all anchor tags
        for (var i = 0; i < anchors.length; i++) {
            var anchor = anchors[i];

            var relAttribute = String(anchor.getAttribute('rel'));

			// use the string.match() method to catch 'lightboxdiv' references in the rel attribute
            if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightboxdiv'))) {
                anchor.onclick = function () {
                    myLightboxdiv.start(this);
                    return false;
                }
            }
        }

		// The rest of this code inserts html at the bottom of the page that looks similar to this:
        //
        //	<div id="overlay"></div>
        //	<div id="lightboxdiv">
        //		<div id="outerImageContainer">
        //			<div id="imageContainer">
        //				<img id="lightboxdivImage">
        //				<div style="" id="hoverNav">
        //					<a href="#" id="prevLink"></a>
        //					<a href="#" id="nextLink"></a>
        //				</div>
        //				<div id="loading">
        //					<a href="#" id="loadingLink">
        //						<img src="images/loading.gif">
        //					</a>
        //				</div>
        //			</div>
        //		</div>
        //		<div id="imageDataContainer">
        //			<div id="imageData">
        //				<div id="imageDetails">
        //					<span id="caption"></span>
        //					<span id="numberDisplay"></span>
        //				</div>
        //				<div id="bottomNav">
        //					<a href="#" id="bottomNavClose">
        //						<img src="images/close.gif">
        //					</a>
        //				</div>
        //			</div>
        //		</div>
        //	</div>


        var objBody = document.getElementsByTagName("body").item(0);

        var objOverlay = document.createElement("div");
        objOverlay.setAttribute('id', 'overlay');
        objOverlay.style.display = 'none';
        objBody.appendChild(objOverlay);

        var objLightboxdiv = document.createElement("div");
        objLightboxdiv.setAttribute('id', 'lightboxdiv');
        objLightboxdiv.style.display = 'none';
        objBody.appendChild(objLightboxdiv);


        var objOuterImageContainer = document.createElement("div");
        objOuterImageContainer.setAttribute('id', 'outerImageContainer');
        objLightboxdiv.appendChild(objOuterImageContainer);
//
//        var objLightboxClose = document.createElement("div");
//        objLightboxClose.setAttribute('id', 'lightboxDivCloseButton');
//        objLightboxClose.innerHTML = "CLOSE";
//        objLightboxClose.onclick = function() {
//            myLightboxdiv.end();
//            return false;
//        }
//        objOuterImageContainer.appendChild(objLightboxClose);


        var objLightboxdivImage = document.createElement("div");
        objLightboxdivImage.setAttribute('id', 'lightboxdivContent');
        objOuterImageContainer.appendChild(objLightboxdivImage);


    },

    onclick: '',
    //
    //	start()
    //	Display overlay and lightboxdiv. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {
        if (!document.getElementsByTagName) {
            return;
        }
        var rel = imageLink.getAttribute('rel');
        var divName = imageLink.getAttribute('title');
        var href = imageLink.getAttribute('href');
        onclick = imageLink.getAttribute('onfocus');        
        var params = new Array();
        var form = null;
        var formPattern = /.*\[(.+)\]/;
        var result = rel.match(formPattern);
        if (result != null && result.length > 1) {
            form = result[1];
            params = parseParams(href);
            fillParams(form, params);
        }

		// stretch overlay to fill page and fade in
        var arrayPageSize = getPageSize();

        Element.setHeight('overlay', arrayPageSize[1]);

        new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.5 });

        // calculate top offset for the lightboxdiv and display
        var arrayPageScroll = getPageScroll();
        var lightboxdivTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);
        Element.setTop('lightboxdiv', lightboxdivTop);
        Element.show('lightboxdiv');

        this.changeImage(divName);

    },

    // if you aren't using an <a> tag, start with div id like so
    // myLightboxdiv.startDiv(divId);
    startDiv: function(divName, formName, formParams) {
        if (!document.getElementsByTagName) {
            return;
        }        

        var params = new Array();
        onclick = "";
        if (arguments.length >= 2) {
            form = formName;
            if (arguments.length >=3) {
                params = parseParams(formParams);
                fillParams(form, params);
            }
        }

		// stretch overlay to fill page and fade in
        var arrayPageSize = getPageSize();

        Element.setHeight('overlay', arrayPageSize[1]);

        new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.5 });

        // calculate top offset for the lightboxdiv and display
        var arrayPageScroll = getPageScroll();
        var lightboxdivTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);
        Element.setTop('lightboxdiv', lightboxdivTop);
        Element.show('lightboxdiv');

        this.changeImage(divName);
    },
    //
    //	changeImage()
    //	Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(divName) {

        // hide elements during transition
        Element.hide('lightboxdivContent');
        var cont = document.getElementById('lightboxdivContent');

        if (cont.childNodes != null && cont.childNodes.length > 0) {
            for (var k = 0; k < cont.childNodes.length; k++) {
                cont.childNodes[k].style.display = 'none';
            }
        }

        var contentDiv = document.getElementById(divName);


        var contentContainer = document.getElementById('outerImageContainer');
        contentContainer.style.width = contentDiv.style.width;
        contentContainer.style.height = contentDiv.style.height;
        
        cont.style.width = contentDiv.style.width;
        cont.style.height = contentDiv.style.height;
        cont.appendChild(contentDiv);        
//        Element.setInnerHTML('lightboxdivContent', html);
        this.showContent(divName);
        hideSelectBoxes(divName);
    },

    //
    //	resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {
        /*
// get current height and width
this.wCur = Element.getWidth('outerImageContainer');
this.hCur = Element.getHeight('outerImageContainer');
// scalars based on change from old to new
this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

// calculate size difference between new and old image, and resize if necessary
wDiff = (this.wCur - borderSize * 2) - imgWidth;
hDiff = (this.hCur - borderSize * 2) - imgHeight;

//		if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
//		if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

// if new and old image are same size and no scaling transition is necessary,
// do a quick pause to prevent image flicker.
//		if((hDiff == 0) && (wDiff == 0)){
//			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
//		}
//
//		Element.setHeight('prevLink', imgHeight);
//		Element.setHeight('nextLink', imgHeight);
//		Element.setWidth( 'imageDataContainer', imgWidth + (borderSize * 2));

        */
    },

    //
    //	showImage()
    //	Display image and begin preloading neighbors.
    //
    showContent: function(divName) {
        myLightboxdiv.updateDetails();
        document.getElementById(divName).style.display = '';
        new Effect.Appear('lightboxdivContent', { duration: 0.5, queue: 'end'});
    },

    //
    //	updateDetails()
    //	This is where we'll execute any additional fuctions specified.
    //
    updateDetails: function() {
        eval(onclick);
    },

    //
    //	updateNav()
    //	Display appropriate previous and next hover navigation.
    //
    updateNav: function() {

    },

    //
    //	enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.onkeydown = this.keyboardAction;
    },

    //
    //	disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.onkeydown = '';
    },

    //
    //	keyboardAction()
    //
    keyboardAction: function(e) {
        if (e == null) { // ie
            keycode = event.keyCode;
        } else { // mozilla
            keycode = e.which;
        }

        key = String.fromCharCode(keycode).toLowerCase();

        if ((key == 'x') || (key == 'o') || (key == 'c')) {    // close lightboxdiv
            myLightboxdiv.end();
        } else if (key == 'p') {    // display previous image
            if (activeImage != 0) {
                myLightboxdiv.disableKeyboardNav();
                myLightboxdiv.changeImage(activeImage - 1);
            }
        } else if (key == 'n') {    // display next image
            if (activeImage != (imageArray.length - 1)) {
                myLightboxdiv.disableKeyboardNav();
                myLightboxdiv.changeImage(activeImage + 1);
            }
        }


    },

    //
    //	preloadNeighborImages()
    //	Preload previous and next images.
    //
    preloadNeighborImages: function() {

        if ((imageArray.length - 1) > activeImage) {
            preloadNextImage = new Image();
            preloadNextImage.src = imageArray[activeImage + 1][0];
        }
        if (activeImage > 0) {
            preloadPrevImage = new Image();
            preloadPrevImage.src = imageArray[activeImage - 1][0];
        }

    },

    //
    //	end()
    //
    end: function() {
        this.disableKeyboardNav();
        Element.hide('lightboxdiv');
        new Effect.Fade('overlay', { duration: 0.2});
        showSelectBoxes();
    }
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll() {

    var yScroll;

    if (self.pageYOffset) {
        yScroll = self.pageYOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {     // Explorer 6 Strict
        yScroll = document.documentElement.scrollTop;
    } else if (document.body) {// all other Explorers
        yScroll = document.body.scrollTop;
    }

    arrayPageScroll = new Array('', yScroll)
    return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize() {

    var xScroll, yScroll;

    if (window.innerHeight && window.scrollMaxY) {
        xScroll = document.body.scrollWidth;
        yScroll = window.innerHeight + window.scrollMaxY;
    } else if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac
        xScroll = document.body.scrollWidth;
        yScroll = document.body.scrollHeight;
    } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
        xScroll = document.body.offsetWidth;
        yScroll = document.body.offsetHeight;
    }

    var windowWidth, windowHeight;
    if (self.innerHeight) {    // all except Explorer
        windowWidth = self.innerWidth;
        windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
        windowWidth = document.documentElement.clientWidth;
        windowHeight = document.documentElement.clientHeight;
    } else if (document.body) { // other Explorers
        windowWidth = document.body.clientWidth;
        windowHeight = document.body.clientHeight;
    }

	// for small pages with total height less then height of the viewport
    if (yScroll < windowHeight) {
        pageHeight = windowHeight;
    } else {
        pageHeight = yScroll;
    }

	// for small pages with total width less then width of the viewport
    if (xScroll < windowWidth) {
        pageWidth = windowWidth;
    } else {
        pageWidth = xScroll;
    }


    arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight)
    return arrayPageSize;
}

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightboxdiv.
//
function getKey(e) {
    if (e == null) { // ie
        keycode = event.keyCode;
    } else { // mozilla
        keycode = e.which;
    }
    key = String.fromCharCode(keycode).toLowerCase();

    if (key == 'x') {
    }
}

// -----------------------------------------------------------------------------------

//
// listenKey()
//
function listenKey() {
    document.onkeypress = getKey;
}

// ---------------------------------------------------

function showSelectBoxes() {
    selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "visible";
    }
}

//
// parseParams
// pulls the param=value pairs from the query string of a url.
//
function parseParams(href) {
    var start = href.indexOf('?') + 1;
    var queryString = href.substring(start, href.length);
    var queryArr = queryString.split('&');
    var ret = new Array(queryArr.length);
    for (var i = 0; i < queryArr.length; i++) {
        var param = queryArr[i].substring(0, queryArr[i].indexOf('='));
        var value = queryArr[i].substring(queryArr[i].indexOf('=') + 1, queryArr[i].length);
        ret[i] = new Array(2);
        ret[i][0] = param;
        ret[i][1] = value;
    }
    return ret;
}

function fillParams(form, params) {
    if (document.forms[form]) {
        for (var p = 0; p < params.length; p++) {
            for (var k = 0; k < document.forms[form].elements.length; k++) {
                if (params[p][0] == document.forms[form].elements[k].name && document.forms[form].elements[k].type != 'submit') {                    
                    if (document.forms[form].elements[k].type == 'select-one') {
                        for (var j = 0; j < document.forms[form].elements[k].options.length; j++) {
                            if (document.forms[form].elements[k].options[j].value == params[p][1]) {
                                document.forms[form].elements[k].options[j].selected = true;
                            }
                        }
                    } else if (document.forms[form].elements[k].type == 'radio') {
                        if (document.forms[form].elements[k].value == params[p][1]) {
                            document.forms[form].elements[k].checked = true;
                        }
                    } else {
                        document.forms[form].elements[k].value = params[p][1] + "";
                    }
                }
            }
        }
    }
}
// ---------------------------------------------------

function hideSelectBoxes(divName) {
    selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "hidden";
    }
    selects = document.getElementById(divName).getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "visible";
    }
}

// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
    var now = new Date();
    var exitTime = now.getTime() + numberMillis;
    while (true) {
        now = new Date();
        if (now.getTime() > exitTime)
            return;
    }
}

// ---------------------------------------------------

var myLightboxdiv;
function initLightboxdiv() {
    myLightboxdiv = new Lightboxdiv();
}
Event.observe(window, 'load', initLightboxdiv, false);