/* ===========================================================================
 *
 * JQuery Quick Pagination
 * Version 1.0.1
 * Quick and dirty pagination for pretty much any set of elements on the page.
 *
 * Author: Mark Perkins
 * Author email: mark@allmarkedup.com
 * For full documentation and more go to http://projects.allmarkedup.com/jquery_quick_paginate/
 *
 * ---------------------------------------------------------------------------
 *
 * LICENCE:
 *
 * Released under a MIT Licence. See licence.txt that should have been supplied with this file,
 * or visit http://projects.allmarkedup.com/jquery_quick_paginate/licence.txt
 *
 * ---------------------------------------------------------------------------
 *
 * EXAMPLES OF USE:
 *
 * jQuery('.news_item').quickpaginate(); // would paginate all items on the page with the class of 'news_item'
 *
 * jQuery('div#quick_slideshow img').quickpaginate(); // would paginate all img elements within the div with an id of 'quick_slideshow'
 *
 * // Paginate everything with the class of "news_item",
 * // 5 per 'page' and without the page counter.
 * jQuery('.news_item').quickpaginate( { perpage: 5, showcounter: false } );
 *
 * // Paginate all img elements and the element with the id of "info",
 * // with the prev/next/counter element appended to the element with the id of "pager_here"
 * jQuery('img, #info').quickpaginate({ pager : $("#pager_here") });
 *
 */

jQuery.fn.quickpaginate = function( settings ) {

	settings = jQuery.extend({

		perpage: 6,

		pager : null,

		showcounter : true,

		prev : "qp_next",

		next : "qp_prev",

		pagenumber : "qp_pagenumber",

		totalnumber : "qp_totalnumber",

		counter : "qp_counter"

	}, settings);

	var cm;

	var total;

	var last = false;

	var first = true;

	var items = jQuery(this);

	var nextbut;

	var prevbut;

	var init = function()
	{
		items.show();

		total = items.size();

		if ( items.size() > settings.perpage )
		{
			items.filter(":gt("+(settings.perpage-1)+")").hide();

			cm = settings.perpage;

			setNav();
		}
	};

	var goNext = function()
	{
		if ( !last )
		{
			var nm = cm + settings.perpage;
			items.hide();

			items.slice( cm, nm ).show();
			cm = nm;

			if ( cm >= total  )
			{
				last = true;
				nextbut.addClass("qp_disabled");
			}

			if ( settings.showcounter ) settings.pager.find("."+settings.pagenumber).text(cm/settings.perpage);

			prevbut.removeClass("qp_disabled");
			first = false;
		}
	};

	var goPrev = function()
	{
		if ( !first )
		{
			var nm = cm-settings.perpage;
			items.hide();

			items.slice( (nm - settings.perpage), nm ).show();
			cm = nm;

			if ( cm == settings.perpage  )
			{
				first = true;
				prevbut.addClass("qp_disabled");
			}

			if ( settings.showcounter ) settings.pager.find("."+settings.pagenumber).text(cm/settings.perpage);

			nextbut.removeClass("qp_disabled");
			last = false;
		}
	};

	var setNav = function()
	{
		if ( settings.pager === null )
		{
			settings.pager = jQuery('<div class="qc_pager"></div>');
			items.eq( items.size() -1 ).after(settings.pager);
		}

		var pagerNav = $('<a class="'+settings.prev+'" href="#">&laquo; Предишна</a><a class="'+settings.next+'" href="#">Следваща &raquo;</a>');

		jQuery(settings.pager).append( pagerNav );

		if ( settings.showcounter )
		{
			var counter = '<span class="'+settings.counter+'"><span class="'+settings.pagenumber+'"></span> / <span class="'+settings.totalnumber+'"></span></span>';

			settings.pager.find("."+settings.prev).after( counter );

			settings.pager.find("."+settings.pagenumber).text( 1 );
			settings.pager.find("."+settings.totalnumber).text( Math.ceil(total / settings.perpage) );
		}

		nextbut = settings.pager.find("."+settings.next);

		prevbut = settings.pager.find("."+settings.prev);

		prevbut.addClass("qp_disabled");

		nextbut.click(function(){
			goNext();
			return false;
		});

		prevbut.click(function(){
			goPrev();
			return false;
		});

	};

	init(); // run the function
};