mambax7/alumni-26x

/*!
 * custom pager controls - beta testing
  initialize custom pager script BEFORE initializing tablesorter/tablesorter pager
  custom pager looks like this:
  1 | 2 … 5 | 6 | 7 … 99 | 100
    _       _   _        _     adjacentSpacer
        _           _          distanceSpacer
  _____               ________ ends (2 default)
          _________            aroundCurrent (1 default)

 */
/*jshint browser:true, jquery:true, unused:false, loopfunc:true */
/*global jQuery: false */

;(function($){
"use strict";

$.tablesorter = $.tablesorter || {};

$.tablesorter.customPagerControls = function(settings) {
    var defaults = {
        table          : 'table',
        pager          : '.pager',
        pageSize       : '.left a',
        currentPage    : '.right a',
        ends           : 2,                        // number of pages to show of either end
        aroundCurrent  : 1,                        // number of pages surrounding the current page
        link           : '<a href="#">{page}</a>', // page element; use {page} to include the page number
        currentClass   : 'current',                // current page class name
        adjacentSpacer : ' | ',                    // spacer for page numbers next to each other
        distanceSpacer : ' &#133; ',               // spacer for page numbers away from each other (ellipsis)
        addKeyboard    : true                      // add left/right keyboard arrows to change current page
    },
    options = $.extend({}, defaults, settings),
    $table = $(options.table);

    $table
        .on('pagerInitialized pagerComplete', function (e, c) {
            var indx, pages = $('<div/>'), pageArray = [],
            cur = c.page + 1,
            start = cur > 1 ? (c.totalPages - cur < options.aroundCurrent ? -(options.aroundCurrent + 1) + (c.totalPages - cur) : -options.aroundCurrent) : 0,
            end = cur < options.aroundCurrent + 1 ? options.aroundCurrent + 3 - cur : options.aroundCurrent + 1;
            for (indx = start; indx < end; indx++) {
                if (cur + indx >= 1 && cur + indx < c.totalPages) { pageArray.push( cur + indx ); }
            }
            if (pageArray.length) {
                // include first and last pages (ends) in the pagination
                for (indx = 0; indx < options.ends; indx++){
                    if ($.inArray(indx + 1, pageArray) === -1) { pageArray.push(indx + 1); }
                    if ($.inArray(c.totalPages - indx, pageArray) === -1) { pageArray.push(c.totalPages - indx); }
                }
                // sort the list
                pageArray = pageArray.sort(function(a, b){ return a - b; });
                // make links and spacers
                $.each(pageArray, function(indx, value){
                    pages
                        .append( $(options.link.replace(/\{page\}/g, value)).toggleClass(options.currentClass, value === cur).attr('data-page', value) )
                        .append( '<span>' + (indx < pageArray.length - 1 && ( pageArray[ indx + 1 ] - 1 !== value ) ? options.distanceSpacer :
                            ( indx >= pageArray.length - 1 ? '' : options.adjacentSpacer )) + '</span>' );
                });
            }
            $('.pagecount').html(pages.html());
        });

    // set up pager controls
    $(options.pager).find(options.pageSize).on('click', function () {
        $(this)
        .addClass(options.currentClass)
        .siblings()
        .removeClass(options.currentClass);
        $table.trigger('pageSize', $(this).html());
        return false;
    }).end()
    .on('click', options.currentPage, function(){
        $(this)
        .addClass(options.currentClass)
        .siblings()
        .removeClass(options.currentClass);
        $table.trigger('pageSet', $(this).attr('data-page'));
        return false;
    });

    // make right/left arrow keys work
    if (options.addKeyboard) {
        $(document).on('keydown', function(events){
            // ignore arrows inside form elements
            if (/input|select|textarea/i.test(events.target.tagName)) { return; }
            if (events.which === 37) {
                // left
                $(options.pager).find(options.currentPage).filter('.' + options.currentClass).prevAll(':not(span):first').click();
            } else if (events.which === 39) {
                // right
                $(options.pager).find(options.currentPage).filter('.' + options.currentClass).nextAll(':not(span):first').click();
            }
        });
    }
};
})(jQuery);