/*
 * xLazyLoader 1.0 - Plugin for jQuery
 *
 * Load js, css and  images
 *
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * Depends:
 *   jquery.js
 *
 *  Copyright (c) 2008 Oleg Slobodskoi (jimdo.com)
 */
/*
$.xLazyLoader({
     js: 'ui.core.js','ui.dialog.js',
     css: 'ui.dialog.css',
     image: 'your_image1.jpg', 'your_image2.jpg',
     name: 'dialog',
     load: function(){
         alert('All files are loaded');
     }
});
 */
;(function($){

        $.xLazyLoader =  function ( method, options ) {
                if (typeof method == 'object') {
                        options = method;
                        method = 'load';
                };
               
                xLazyLoader[method]( options );
        };
       
        var xLazyLoader = new function ()
        {

               
                var head = document.getElementsByTagName("head")[0];
               
               
                this.load = function ( options )
                {
                        //Defaults
                        var d = {
                                js: [],
                                css: [],
                                image: [],
                                name: null,
                                load: function(){}
                        };
                        $.extend(d, options);
                       
                        var self = this,
                                ready = false,
                                loaded = {
                                        js: [],
                                        css: [],
                                        image: []
                                }
                        ;
                       
                        each('js', d.js);
                        each('css', d.css);
                        each('image', d.image);
                       
                        function each (type, urls)
                        {
                                if ( $.isArray(urls) && urls.length>0 )
                                        $.each( urls, function(i, url){
                                                load(type, url);
                                        });
                                else if (typeof urls == 'string')
                                        load(type, urls);
                        };

                        function load (type, url)
                        {
                                self[type](url, function() {
                                        $.isArray(d[type]) ? loaded[type].push(url) : loaded[type] = url;
                                        d.js.length == loaded.js.length
                                        && d.css.length == loaded.css.length
                                        && d.image.length == loaded.image.length
                                        && d.load.apply(loaded, []);
                    return;
                                }, d.name ?'lazy-loaded-'+ d.name : 'lazy-loaded-'+new Date().getTime());
                        };
                       
                };
               
                this.js = function (src, callback, name)
                {
                        if ($('script[src*="'+src+'"]').length>0) {
                                callback();
                                return;
                        };

            var script = document.createElement('script');
            script.setAttribute("type","text/javascript");
            script.setAttribute("src", src);
            script.setAttribute('id', name);

                        if ($.browser.msie)
                                script.onreadystatechange = function () {
                                         /loaded|complete/.test(script.readyState) && callback();
                                }
                        else
                                //FF, Safari, Opera
                                script.onload = callback;

                        head.appendChild(script);
                };
               
                this.css = function (href, callback, name)
                {

                        if ($('link[href*="'+href+'"]').length>0) {
                                callback();
                                return;
                        };
                       

                        var link = $('<link rel="stylesheet" type="text/css" media="all" href="'+href+'" id="'+name+'"></link>')[0];

                        if ($.browser.msie)
                                link.onreadystatechange = function ()   {
                    /loaded|complete/.test(link.readyState) && callback();
                                }
                        else if ($.browser.opera)
                                link.onload = callback;
                        else
                                //FF, Safari, Chrome
                                (function(){
                                        try {
                                                link.sheet.cssRule;
                                        } catch(e){
                                                setTimeout(arguments.callee, 20);
                                                return;
                                        };
                                        callback();
                                })();
                        head.appendChild(link);
                };
               
                this.image = function (src, callback)
                {
                        var img = new Image();
                        img.onload = callback;
                        img.src = src;
                };
       
                this.disable = function ( name )
                {      
                        $('#lazy-loaded-'+name, head).attr('disabled', 'disabled');
                };

                this.enable = function ( name )
                {      
                        $('#lazy-loaded-'+name, head).removeAttr('disabled');
                };
               
               
                this.destroy = function ( name )
                {
                        $('#lazy-loaded-'+name, head).remove();
                };
               
               
               



        };



})(jQuery);