jQuery("document").ready(function(){

	// register ajax gallery-navigation listeners

	jQuery("a.page-numbers").click(function(e) {

		return ngg_ajax_navigation(e, this);

	});

	jQuery("a.prev").click(function(e) {

		return ngg_ajax_navigation(e, this);

	});
	
	jQuery("a.next").click(function(e) {

		return ngg_ajax_navigation(e, this);

	});

	// register ajax browser-navigation listeners

	jQuery("a.ngg-browser-next").click(function(e) {

		return ngg_ajax_browser_navigation(e, this);

	});

	jQuery("a.ngg-browser-prev").click(function(e) {

		return ngg_ajax_browser_navigation(e, this);

	});

});



function ngg_ajax_navigation(e, obj) {

	// try to find page number

	var pageNumber = 0;

	if (jQuery(obj).hasClass("page-numbers")) {

		pageNumber = jQuery(obj).contents()[0].data;

	} else if (jQuery(obj).hasClass("prev")) {

		pageNumber = jQuery(obj).attr("id").substr(9);

	} else if (jQuery(obj).hasClass("next")) {

		pageNumber = jQuery(obj).attr("id").substr(9);

	}

	

	// try to find gallery number by checking the parents ID until we find a matching one

	var currentNode = obj;

	while (null != currentNode.parentNode && !jQuery.nodeName(currentNode.parentNode, "body") && "ngg-gallery-" != jQuery(currentNode.parentNode).attr("id").substring(0, 12)) {

		currentNode = currentNode.parentNode;

	}

	

	if (jQuery(currentNode.parentNode).attr("id")) {

		var gallery = jQuery(currentNode.parentNode);



		// we found a gallery, let's extract the post id & gallery id

		var payload = gallery.attr("id").substring(12);

		var separatorPosition = parseInt(payload.indexOf("-"));

		

		var galleryId = payload.substr(0, separatorPosition);

		var postId = payload.substr(separatorPosition + 1);



		if ( (galleryId.length == 0) || (postId.length == 0) ) {

			return true;

		}

				

		ngg_show_loading(e);

		

		// load gallery content

		jQuery.get(ngg_ajax.path + "nggajax.php", {p: postId, galleryid: galleryId, nggpage: pageNumber, type: "gallery"}, function (data, textStatus) {

			

			// delete old content

			gallery.children().remove();

			

			// add new content

			gallery.replaceWith(data);

			

			// add ajax-navigation, again

			jQuery("document").ready(function(){

				// remove old listeners to avoid double-clicks

				jQuery("a.page-numbers").unbind("click");

				jQuery("a.prev").unbind("click");

				jQuery("a.next").unbind("click");

				

				// add shutter-listeners again

				shutterReloaded.init('sh');

				

				jQuery("a.page-numbers").click(function(e) {

					return ngg_ajax_navigation(e, this);

				});

				jQuery("a.prev").click(function(e) {

					return ngg_ajax_navigation(e, this);

				});

				jQuery("a.next").click(function(e) {

					return ngg_ajax_navigation(e, this);

				});

				

				ngg_remove_loading();

			});

		});

		

		// deactivate HTML link

		return false;

	}

	

	// an error occurred, use traditional HTML link

	return true;

};



function ngg_ajax_browser_navigation(e, obj) {

	



	// try to find gallery number

	if ("ngg-prev-" == jQuery(obj).attr("id").substr(0, 9) || "ngg-next-" == jQuery(obj).attr("id").substr(0, 9)) {

		

		// extract the image-id

		var imageNumber = jQuery(obj).attr("id").substr(9);



		// find the image-browser-container

		var currentNode = obj;

		while (null != currentNode.parentNode && !jQuery.nodeName(currentNode.parentNode, "body") && !jQuery(currentNode.parentNode).hasClass("ngg-imagebrowser")) {

			currentNode = currentNode.parentNode;

		}

		

		if (jQuery(currentNode.parentNode).hasClass("ngg-imagebrowser")) {

			var gallery = jQuery(currentNode.parentNode);



			// let's extract the post id & gallery id

			var payload = gallery.attr("id").substring(17);

			var separatorPosition = parseInt(payload.indexOf("-"));

			

			var galleryId = payload.substr(0, separatorPosition);

			var postId = payload.substr(separatorPosition + 1);

			

			if ( (galleryId.length == 0) || (postId.length == 0) ) {

				return true;

			}

			

			ngg_show_loading(e);

			

			// get content

			jQuery.get(ngg_ajax.path + "nggajax.php", {p: postId, galleryid: galleryId, pid: imageNumber, type: "browser"}, function (data, textStatus) {

				// delete old content

				gallery.children().remove();

				

				// add new content

				gallery.replaceWith(data);

				

				// add ajax-navigation, again

				jQuery("document").ready(function(){

					// remove old listeners to avoid double-clicks

					jQuery("a.ngg-browser-next").unbind("click");

					jQuery("a.ngg-browser-prev").unbind("click");

					

					// add shutter-listeners again

					shutterReloaded.init('sh');

					

					// register ajax browser-navigation listeners

					jQuery("a.ngg-browser-next").click(function(e) {

						return ngg_ajax_browser_navigation(e, this);

					});

					jQuery("a.ngg-browser-prev").click(function(e) {

						return ngg_ajax_browser_navigation(e, this);

					});

					

					ngg_remove_loading();

				});

			});

	

			// deactivate HTML link

			return false;

		}

	}

	

	return true;

}



var loadingImage;

function ngg_show_loading(obj) {

	loadingImage = jQuery(document.createElement("img")).attr("src", ngg_ajax.path + "images/ajax-loader.gif").attr("alt", ngg_ajax.loading);



	jQuery("body").append(loadingImage);

	

	jQuery(loadingImage).css({

		position: "absolute",

		top: (obj.pageY + 15) + "px",

		left: (obj.pageX + 15) + "px"

	});

	

	jQuery(document).mousemove(function(e) {

		loadingImage.css({

			top: (e.pageY + 15) + "px",

			left: (e.pageX + 15) + "px"

		});

	});

}



function ngg_remove_loading() {

	jQuery(document).unbind("mousemove");

	

	jQuery(loadingImage).remove();

}