/* ===========================================================================
 *
 * JQuery Quick Pagination
 * Version 2.0
 * Quick and dirty pagination for pretty much any set of elements on the page.
 *
 * Authors: Mark Perkins & Brian Landau
 *
 * ---------------------------------------------------------------------------
 *
 * 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
 *
 */
(function($) {
    $.fn.quickpaginate = function(settings) {
        settings = jQuery.extend({
            perpage: 10,
            pager: null,
            showcounter: true,
            prev_class: "qp_prev",
            next_class: "qp_next",
            prev_text: '<img src="resources/img/b_previous.gif" />',
            next_text: '<img src="resources/img/b_next.gif" />',
            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();
            }
            $(document).trigger('init_finished.quickpaginate');
        };

        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;
                $(document).trigger('paginate.quickpaginate', ['next', (cm / settings.perpage)]);
            }
        };

        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;
                $(document).trigger('paginate.quickpaginate', ['prev', (cm / settings.perpage)]);
            }
        };

        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 = $('<div class="' + settings.prev_class + '"><a href="#">' + settings.prev_text + '</a></div><div class="pagecounter"><span class="' + settings.counter + '">Page <span class="' + settings.pagenumber + '">1</span> of  <span class="' + settings.totalnumber + '">' + Math.ceil(total / settings.perpage)  + '</span></span></div><div class="' + settings.next_class + '"><a href="#">' + settings.next_text + '</a></div>');

            //alert(settings.prev_class);
            settings.pager.find("." + settings.prev_class).after(pagerNav);
            settings.pager.find("." + settings.pagenumber).text(1);
            //settings.pager.find("." + settings.totalnumber).text(Math.ceil(total / settings.perpage));

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

            nextbut = settings.pager.find("." + settings.next_class + ' a');
            prevbut = settings.pager.find("." + settings.prev_class + ' a');
            prevbut.addClass("qp_disabled");

            nextbut.click(function(e) {
                e.preventDefault();
                goNext();
                return false;
            });
            prevbut.click(function(e) {
                e.preventDefault();
                goPrev();
                return false;
            });
        };

        init(); // run the function
    };
})(jQuery);