/*
Created By: Chris Campbell
Website: http://particletree.com
Date: 2/1/2006

Adapted By: Simon de Haan
Website: http://blog.eight.nl
Date: 21/2/2006

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
And the lightbox gone wild by ParticleTree at http://particletree.com/features/lightbox-gone-wild/

*/

/*-------------------------------GLOBAL VARIABLES------------------------------------*/

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

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

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 								= "an unknown operating system";
	}
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

// higinio
function onClickLightbox(url) {
    var popup = new lightbox(null); 
    popup.content = url; 
    popup.activate();
	window.scrollTo(0,0);
}

function onClickLightboxClose(url) {
    $('overlay').style.display = 'none';
}

function closeLightbox() {
        Element.remove($('lbContent'));
        $('overlay').style.display = 'none';
        $('lightbox').style.display = 'none';
}
// end higinio

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

Event.observe(window, 'load', initialize, false);
Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var lightbox = Class.create();

lightbox.prototype = {

    yPos: 0,
    xPos: 0,

    // Higinio patch
    initialize: function(ctrl) {
        if (ctrl != null) {

            // begin onload patch
            if ($('lbOnAuto')) {
                var lbOnAuto = $('lbOnAuto').value;
                if (lbOnAuto) {
                    this.content = lbOnAuto;
                    if (browser == 'Internet Explorer') {
                        this.getScroll();                        
                        this.prepareIE('100%', '');
                        this.setScroll(0, 0);
                        this.hideSelects('hidden');
                    }
                    this.displayLightbox("block");                    
                    $('lbOnAuto').value = '';
                }
            }
            // end onload patch

            this.content = ctrl.rel;
            Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
            ctrl.onclick = function() { $('lightbox').className = "loading"; return false; };
        }
    },

    // end higinio patch

    // Turn everything on - mainly the IE fixes
    activate: function() {
        if (browser == 'Internet Explorer') {
            this.getScroll();
            this.prepareIE('100%', '');
            this.setScroll(0, 0);
            this.hideSelects('hidden');
        }
        /*
		else {
            this.setScroll(0, 0);
        }
		*/
        this.displayLightbox("block");
    },

    // Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox	
    prepareIE: function(height, overflow) {
        bod = document.getElementsByTagName('body')[0];
        bod.style.height = height;
        bod.style.overflow = overflow;

        htm = document.getElementsByTagName('html')[0];
        htm.style.height = height;
        htm.style.overflow = overflow;
    },



    // In IE, select elements hover on top of the lightbox
    hideSelects: function(visibility) {
        selects = document.getElementsByTagName('select');
        for (i = 0; i < selects.length; i++) {
            selects[i].style.visibility = visibility;
        }
    },

    // Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
    getScroll: function() {
        if (self.pageYOffset) {
            this.yPos = self.pageYOffset;
        } else if (document.documentElement && document.documentElement.scrollTop) {
            this.yPos = document.documentElement.scrollTop;
        } else if (document.body) {
            this.yPos = document.body.scrollTop;
        }
    },

    setScroll: function(x, y) {
        window.scrollTo(x, y);
    },

    displayLightbox: function(display) {
        $('overlay').style.display = display;
        $(this.content).style.display = display;
        if (display != 'none') this.actions();
    },

    // Search through new links within the lightbox, and attach click event
    actions: function() {
        lbActions = document.getElementsByClassName('lbAction');

        for (i = 0; i < lbActions.length; i++) {
            Event.observe(lbActions[i], 'click', this[lbActions[i].rel].bindAsEventListener(this), false);
            lbActions[i].onclick = function() { return false; };
        }

    },

    // Example of creating your own functionality once lightbox is initiated
    deactivate: function() {
        if (browser == "Internet Explorer") {
            this.setScroll(0, 0);
            this.prepareIE("auto", "");
            this.hideSelects("visible");
        }

        this.displayLightbox("none");
    }
}

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

// Onload, make all links that need to trigger a lightbox active
function initialize(){
	addLightboxMarkup();
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		valid = new lightbox(lbox[i]);
	}
}

// Add in markup necessary to make this work. Basically two divs:
// Overlay holds the shadow
// Lightbox is the centered square that the content is put into.
function addLightboxMarkup() {

	bod 				= document.getElementsByTagName('body')[0];

	overlay 			= document.createElement('div');
	overlay.id			= 'overlay';

	bod.appendChild(overlay);
}