/* Simple AJAX Code-Kit (SACK) v1.6.1 */
/* ©2005 Gregory Wild-Smith */
/* www.twilightuniverse.com */
/* Software licenced under a modified X11 licence,
   see documentation or authors website for more details */

//alert('Javascript loaded');

function sack(file) {
	this.xmlhttp = null;

	this.resetData = function() {
		this.method = "POST";
  		this.queryStringSeparator = "?";
		this.argumentSeparator = "&";
		this.URLString = "";
		this.encodeURIString = true;
  		this.execute = false;
  		this.element = null;
		this.elementObj = null;
		this.requestFile = file;
		this.vars = new Object();
		this.responseStatus = new Array(2);
  	};

	this.resetFunctions = function() {
  		this.onLoading = function() { };
  		this.onLoaded = function() { };
  		this.onInteractive = function() { };
  		this.onCompletion = function() { };
  		this.onError = function() { };
		this.onFail = function() { };
	};

	this.reset = function() {
		this.resetFunctions();
		this.resetData();
	};

	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e2) {
				this.xmlhttp = null;
			}
		}

		if (! this.xmlhttp) {
			if (typeof XMLHttpRequest != "undefined") {
				this.xmlhttp = new XMLHttpRequest();
			} else {
				this.failed = true;
			}
		}
	};

	this.setVar = function(name, value){
		this.vars[name] = Array(value, false);
	};

	this.encVar = function(name, value, returnvars) {
		if (true == returnvars) {
			return Array(encodeURIComponent(name), encodeURIComponent(value));
		} else {
			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
		}
	}

	this.processURLString = function(string, encode) {
		encoded = encodeURIComponent(this.argumentSeparator);
		regexp = new RegExp(this.argumentSeparator + "|" + encoded);
		varArray = string.split(regexp);
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split("=");
			if (true == encode){
				this.encVar(urlVars[0], urlVars[1]);
			} else {
				this.setVar(urlVars[0], urlVars[1]);
			}
		}
	}

	this.createURLString = function(urlstring) {
		if (this.encodeURIString && this.URLString.length) {
			this.processURLString(this.URLString, true);
		}

		if (urlstring) {
			if (this.URLString.length) {
				this.URLString += this.argumentSeparator + urlstring;
			} else {
				this.URLString = urlstring;
			}
		}

		// prevents caching of URLString
		this.setVar("rndval", new Date().getTime());

		urlstringtemp = new Array();
		for (key in this.vars) {
			if (false == this.vars[key][1] && true == this.encodeURIString) {
				encoded = this.encVar(key, this.vars[key][0], true);
				delete this.vars[key];
				this.vars[encoded[0]] = Array(encoded[1], true);
				key = encoded[0];
			}

			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
		}
		if (urlstring){
			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
		} else {
			this.URLString += urlstringtemp.join(this.argumentSeparator);
		}
	}

	this.runResponse = function() {
		eval(this.response);
	}

	this.runAJAX = function(urlstring) {
		if (this.failed) {
			this.onFail();
		} else {
			this.createURLString(urlstring);
			if (this.element) {
				this.elementObj = document.getElementById(this.element);
			}
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else {
					this.xmlhttp.open(this.method, this.requestFile, true);
					try {
						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
					} catch (e) { }
				}

				this.xmlhttp.onreadystatechange = function() {
					switch (self.xmlhttp.readyState) {
						case 1:
							self.onLoading();
							break;
						case 2:
							self.onLoaded();
							break;
						case 3:
							self.onInteractive();
							break;
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;

							if (self.execute) {
								self.runResponse();
							}

							if (self.elementObj) {
								elemNodeName = self.elementObj.nodeName;
								elemNodeName.toLowerCase();
								if (elemNodeName == "input"
								|| elemNodeName == "select"
								|| elemNodeName == "option"
								|| elemNodeName == "textarea") {
									self.elementObj.value = self.response;
								} else {
									self.elementObj.innerHTML = self.response;
								}
							}
							if (self.responseStatus[0] == "200") {
								self.onCompletion();
							} else {
								self.onError();
							}

							self.URLString = "";
							break;
					}
				};

				this.xmlhttp.send(this.URLString);
			}
		}
	};

	this.reset();
	this.createAJAX();
}


// JavaScript Document

var ajax_obj = new Array();

function eGallery_ajax(url_php, id_html) {
    // Only used to debug ajax
    // alert('Ajax started... wait for result... '+url_php);
    
    // Function to send request to display folder/page infos
    var url = url_php;
    
    var ajaxIndex = ajax_obj.length;
    ajax_obj[ajaxIndex] = new sack();
    
    ajax_obj[ajaxIndex].requestFile = url;	// Specifying which file to get
	ajax_obj[ajaxIndex].onCompletion = function(){ eGallery_return(ajaxIndex, id_html); };	// Specify function that will be executed after file has been found
	ajax_obj[ajaxIndex].runAJAX();		// Execute AJAX function
}


function eGallery_return(ajaxIndex, id_html){

    document.getElementById(id_html).innerHTML = ajax_obj[ajaxIndex].response;
	
    // Only used to debug ajax
    // alert('Ajax completed ! '+ajax_obj[ajaxIndex].response);
    
    ajax_obj[ajaxIndex] = false;
    
}

function showMedia(pic, w, h){
    // alert('showMedia: ' + pic);
    if(egall_lim == 1){
        // Ajust to screen size
        var rap = parseInt(w)/parseInt(h);
        
        // Check width
        if (window.innerWidth && w > (window.innerWidth-20)){
            w = window.innerWidth-90;
            h = Math.ceil(w/rap);
        }
        if (window.innerHeight && h > (window.innerHeight-20)){
            h = window.innerHeight-90;
            w = rap*h;
        }

        if (document.body.offsetWidth && w > (document.body.offsetWidth-20)){
            w = document.body.offsetWidth-90;
            h = Math.ceil(w/rap);
        }
        if (document.body.offsetHeight && h > (document.body.offsetHeight-20)){
            h = document.body.offsetHeight-90;
            w = rap*h;
        }
    }
    
    document.getElementById('egallery_previewMedia').src = pic;
    document.getElementById('egallery_previewMedia').width = w;
    document.getElementById('egallery_previewMedia').height = h;
    
    document.getElementById('egallery_overlay').style.display = 'block';
    
    document.getElementById('egallery_box').style.display = 'block';
    document.getElementById('egallery_box').width = (w+20);
    document.getElementById('egallery_box').height = (h+20);
    
    centerMedia('egallery_box');
    return false;
}

var egall_timer;
var g = -1;

function hideMedia(){
    document.getElementById('egallery_box').style.display = 'none';
    document.getElementById('egallery_overlay').style.display = 'none';
    clearTimeout(egall_timer);
    g = -1;
    return false;
}

function centerMedia(element){
    try{
        element = document.getElementById(element);
    }catch(e){
        return;
    }

    var my_width  = 0;
    var my_height = 0;

    if ( typeof( window.innerWidth ) == 'number' ){
        my_width  = window.innerWidth;
        my_height = window.innerHeight;
    }else if ( document.documentElement && 
             ( document.documentElement.clientWidth ||
               document.documentElement.clientHeight ) ){
        my_width  = document.documentElement.clientWidth;
        my_height = document.documentElement.clientHeight;
    }
    else if ( document.body && 
            ( document.body.clientWidth || document.body.clientHeight ) ){
        my_width  = document.body.clientWidth;
        my_height = document.body.clientHeight;
    }

    element.style.position = 'absolute';
    element.style.zIndex   = 99;

    var scrollY = 0;

    if ( document.documentElement && document.documentElement.scrollTop ){
        scrollY = document.documentElement.scrollTop;
    }else if ( document.body && document.body.scrollTop ){
        scrollY = document.body.scrollTop;
    }else if ( window.pageYOffset ){
        scrollY = window.pageYOffset;
    }else if ( window.scrollY ){
        scrollY = window.scrollY;
    }
    
    var elementDimensions = getDimensions(element);
    //alert(elementDimensions.width);
    
    var setX = ( my_width  - elementDimensions.width  ) / 2;
    var setY = ( my_height - elementDimensions.height ) / 2 + scrollY;

    setX = ( setX < 0 ) ? 0 : setX;
    setY = ( setY < 0 ) ? 0 : setY;

    element.style.left = setX + "px";
    element.style.top  = setY + "px";

    element.style.display  = 'block';
}

function getDimensions(element) {

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
}

function egallery_displayPreview(filepath, w, h){
    document.getElementById('egallery_preview_img').src = filepath;
    document.getElementById('egallery_preview_img').setAttribute("onclick", "showMedia('"+filepath+"','"+w+"','"+h+"');");
}

function egallery_displayInfosFile(filename, filesize, img_width, img_height, desc){
    
    if(desc != ''){
        document.getElementById('egallery_infos_albums').style.display = 'block';
        document.getElementById('egallery_infos_albums').innerHTML = desc+'<br /><br />';
    }else{
        document.getElementById('egallery_infos_albums').style.display = 'none';
    }
    
    document.getElementById('egallery_infos_file_src').innerHTML = filename;
    document.getElementById('egallery_infos_file_size').innerHTML = filesize;
    document.getElementById('egallery_infos_file_dim').innerHTML = img_width+' x '+img_height+' px';
    
    document.getElementById('egallery_infos_file').style.display = 'block';
}

function egallery_hideInfosFile(){
    document.getElementById('egallery_infos_albums').style.display = 'block';
    
    document.getElementById('egallery_infos_file').style.display = 'none';
}

function egallery_displayInfosAlbum(album_description){
    document.getElementById('egallery_infos_albums').innerHTML = album_description;
}

function diaShow_pause(){
    clearTimeout(egall_timer);
}

function diaShow_first(){
    diaShow_pause()
    g=0;
    diaShow();
}

function diaShow_previous(){
    diaShow_pause()
    if(g>1){
        g=g-2;
    }else if(g == 0){
        g=cc-2;
    }else if(g == 1){
        g=cc-1;
    }
    diaShow();
}

function diaShow_next(){
    diaShow_pause()
    //g++;
    diaShow();
}

function diaShow_last(){
    diaShow_pause()
    g=cc-1;
    diaShow();
}

function diaShow(){
    //alert('Diashow will start now... ');
    
    if(g==-1){
        document.getElementById('egallery_diashow_command').style.display = 'block';
        g=0;
    }
    
    // Display pic
    showMedia(egall_diafile[g], egall_diaw[g], egall_diah[g]);
    
    g++;
    if(g == cc){
        g = 0;
        egall_timer = window.setTimeout("diaShow()",12000);
        // Display end diashow
        //alert('Diashow end.');
    }else{
        egall_timer = window.setTimeout("diaShow()",4000);
    }
    
    //document.getElementById('egallery_box').innerHTML += 'TEST';
}