/*
 * Thickbox 2.1 - jQuery plugin for displaying content in a box above the page
 *
 * Copyright (c) 2006, 2007 Cody Lindley (http://www.codylindley.com)
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

// on page load call TB_init
$(document).ready(TB_init);

// add thickbox to href elements that have a class of .thickbox
function TB_init(){
        $("a.thickbox").click(function(event){
                // stop default behaviour
                event.preventDefault();
                // remove click border
                this.blur();

                // get caption: either title or name attribute
                var caption = this.title || this.name || "";

                // get rel attribute for image groups
                var group = this.rel || false;

                // display the box for the elements href
                TB_show(caption, this.href, group);
        });
}

// called when the user clicks on a thickbox link
function TB_show(caption, url, rel) {

        // create iframe, overlay and box if non-existent
        if ( !$("#TB_HideSelect").length ) {
                $("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
                //$("#TB_overlay").click(TB_remove); // tp: schließen wenn außerhalb des bilds geklickt wird
        }
        // TODO replace or check if event is already assigned
        $(window).scroll(TB_position);

        // TODO replace
        TB_overlaySize();

        // TODO create loader only once, hide and show on demand
        $("body").append("<div id='TB_load'><img src='http://projects.tp82.de/thickbox/loadingAnimation.gif' /></div>");
        TB_load_position();

        // check if a query string is involved
        var baseURL = url.match(/(.+)?/)[1] || url;

        // regex to check if a href refers to an image
        var imageURL = /\.(jpe?g|png|gif|bmp)/gi;

        // check for images
        if ( baseURL.match(imageURL) ) {
                var dummy = { caption: "", url: "", html: "" };

                var prev = dummy,
                        next = dummy,
                        imageCount = "";

                // if an image group is given
                if ( rel ) {
                        function getInfo(image, id, label) {
                                return {
                                        caption: image.title,
                                        url: image.href,
                                        html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"
                                }
                        }

                        // find the anchors that point to the group
                        var imageGroup = $("a[@rel="+rel+"]").get();
                        var foundSelf = false;

                        // loop through the anchors, looking for ourself, saving information about previous and next image
                        for (var i = 0; i < imageGroup.length; i++) {
                                var image = imageGroup[i];
                                var urlTypeTemp = image.href.match(imageURL);

                                // look for ourself
                                if ( image.href == url ) {
                                        foundSelf = true;
                                        imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);
                                } else {
                                        // when we found ourself, the current is the next image
                                        if ( foundSelf ) {
                                                next = getInfo(image, "next", "Next &gt;");
                                                // stop searching
                                                break;
                                        } else {
                                                // didn't find ourself yet, so this may be the one before ourself
                                                prev = getInfo(image, "prev", "&lt; Prev");
                                        }
                                }
                        }
                }

                imgPreloader = new Image();
                imgPreloader.onload = function() {
                        imgPreloader.onload = null;

                        // Resizing large images
                        var pagesize = TB_getPageSize();
                        var x = pagesize[0] - 150;
                        var y = pagesize[1] - 150;
                        var imageWidth = imgPreloader.width;
                        var imageHeight = imgPreloader.height;
                        if (imageWidth > x) {
                                imageHeight = imageHeight * (x / imageWidth);
                                imageWidth = x;
                                if (imageHeight > y) {
                                        imageWidth = imageWidth * (y / imageHeight);
                                        imageHeight = y;
                                }
                        } else if (imageHeight > y) {
                                imageWidth = imageWidth * (y / imageHeight);
                                imageHeight = y;
                                if (imageWidth > x) {
                                        imageHeight = imageHeight * (x / imageWidth);
                                        imageWidth = x;
                                }
                        }
                        // End Resizing

                        // TODO don't use globals
                        TB_WIDTH = imageWidth + 30;
                        TB_HEIGHT = imageHeight + 60;

                        // TODO empty window content instead
                        /* tp: thickbox beim anklicken des angezeigten bildes schließen
                        $("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>");
                        */
                        // thickbox nicht schließen; gar nix machen
                        $("#TB_window").append("<img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"' title='"+caption+"'/>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>");


                        $("#TB_closeWindowButton").click(TB_remove);

                        function buildClickHandler(image) {
                                return function() {
                                        $("#TB_window").remove();
                                        $("body").append("<div id='TB_window'></div>");
                                        TB_show(image.caption, image.url, rel);
                                        return false;
                                };
                        }
                        var goPrev = buildClickHandler(prev);
                        var goNext = buildClickHandler(next);
                        if ( prev.html ) {
                                $("#TB_prev").click(goPrev);
                        }

                        if ( next.html ) {
                                $("#TB_next").click(goNext);
                        }

                        // TODO use jQuery, maybe with event fix plugin, or just get the necessary parts of it
                        document.onkeydown = function(e) {
                                if (e == null) { // ie
                                        keycode = event.keyCode;
                                } else { // mozilla
                                        keycode = e.which;
                                }
                                switch(keycode) {
                                case 27:
                                        TB_remove();
                                        break;
                                case 190:
                                        if( next.html ) {
                                                document.onkeydown = null;
                                                goNext();
                                        }
                                        break;
                                case 188:
                                        if( prev.html ) {
                                                document.onkeydown = null;
                                                goPrev();
                                        }
                                        break;
                                }
                        }

                        // TODO don't remove loader etc., just hide and show later
                        TB_position();
                        $("#TB_load").remove();
                        /*$("#TB_ImageOff").click(TB_remove);*/

                        // for safari using css instead of show
                        // TODO is that necessary? can't test safari
                        $("#TB_window").css({display:"block"});
                }
                imgPreloader.src = url;

        } else { //code to show html pages

                var queryString = url.match(/\?(.+)/)[1];
                var params = TB_parseQuery( queryString );

                TB_WIDTH = (params['width']*1) + 30;
                TB_HEIGHT = (params['height']*1) + 40;

                var ajaxContentW = TB_WIDTH - 30,
                        ajaxContentH = TB_HEIGHT - 45;

                if(url.indexOf('TB_iframe') != -1){
                        urlNoQuery = url.split('TB_');
                        $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' onload='TB_showIframe()'> </iframe>");
                } else {
                        $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");
                }

                $("#TB_closeWindowButton").click(TB_remove);

                        if(url.indexOf('TB_inline') != -1){
                                $("#TB_ajaxContent").html($('#' + params['inlineId']).html());
                                TB_position();
                                $("#TB_load").remove();
                                $("#TB_window").css({display:"block"});
                        }else if(url.indexOf('TB_iframe') != -1){
                                TB_position();
                                if(frames['TB_iframeContent'] == undefined){//be nice to safari
                                        $("#TB_load").remove();
                                        $("#TB_window").css({display:"block"});
                                        $(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });
                                }
                        }else{
                                $("#TB_ajaxContent").load(url, function(){
                                        TB_position();
                                        $("#TB_load").remove();
                                        $("#TB_window").css({display:"block"});
                                });
                        }

        }

        $(window).resize(TB_position);

        document.onkeyup = function(e){
                if (e == null) { // ie
                        keycode = event.keyCode;
                } else { // mozilla
                        keycode = e.which;
                }
                if(keycode == 27){ // close
                        TB_remove();
                }
        }

}

//helper functions below

function TB_showIframe(){
        $("#TB_load").remove();
        $("#TB_window").css({display:"block"});
}

function TB_remove() {
         $("#TB_imageOff").unbind("click");
        $("#TB_overlay").unbind("click");
        $("#TB_closeWindowButton").unbind("click");
        $("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});
        $("#TB_load").remove();
        return false;
}

function TB_position() {
        var pagesize = TB_getPageSize();
        var arrayPageScroll = TB_getPageScrollTop();
        var style = {width: TB_WIDTH, left: (arrayPageScroll[0] + (pagesize[0] - TB_WIDTH)/2), top: (arrayPageScroll[1] + (pagesize[1]-TB_HEIGHT)/2)};
        $("#TB_window").css(style);
}

function TB_overlaySize(){
        if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX) {
                yScroll = window.innerHeight + window.scrollMaxY;
                xScroll = window.innerWidth + window.scrollMaxX;
                var deff = document.documentElement;
                var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;
                var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;
                xScroll -= (window.innerWidth - wff);
                yScroll -= (window.innerHeight - hff);
        } else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){ // all but Explorer Mac
                yScroll = document.body.scrollHeight;
                xScroll = document.body.scrollWidth;
        } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
                yScroll = document.body.offsetHeight;
                xScroll = document.body.offsetWidth;
          }
        $("#TB_overlay").css({"height": yScroll, "width": xScroll});
        $("#TB_HideSelect").css({"height": yScroll,"width": xScroll});
}

function TB_load_position() {
        var pagesize = TB_getPageSize();
        var arrayPageScroll = TB_getPageScrollTop();
        $("#TB_load")
                .css({left: (arrayPageScroll[0] + (pagesize[0] - 100)/2), top: (arrayPageScroll[1] + ((pagesize[1]-100)/2)) })
                .css({display:"block"});
}

function TB_parseQuery ( query ) {
        // return empty object
        if( !query )
                return {};
        var params = {};

        // parse query
        var pairs = query.split(/[;&]/);
        for ( var i = 0; i < pairs.length; i++ ) {
                var pair = pairs[i].split('=');
                if ( !pair || pair.length != 2 )
                        continue;
                // unescape both key and value, replace "+" with spaces in value
                params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');
   }
   return params;
}

function TB_getPageScrollTop(){
        var yScrolltop;
        var xScrollleft;
        if (self.pageYOffset || self.pageXOffset) {
                yScrolltop = self.pageYOffset;
                xScrollleft = self.pageXOffset;
        } else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft ){         // Explorer 6 Strict
                yScrolltop = document.documentElement.scrollTop;
                xScrollleft = document.documentElement.scrollLeft;
        } else if (document.body) {// all other Explorers
                yScrolltop = document.body.scrollTop;
                xScrollleft = document.body.scrollLeft;
        }
        arrayPageScroll = new Array(xScrollleft,yScrolltop)
        return arrayPageScroll;
}

function TB_getPageSize(){
        var de = document.documentElement;
        var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
        var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight
        arrayPageSize = new Array(w,h)
        return arrayPageSize;
}