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(function ($, window, document, undefined) {

    'use strict';

    var old = $.fn.twbsPagination;

    // PROTOTYPE AND CONSTRUCTOR

    var TwbsPagination = function (element, options) {
        this.$element = $(element);
        this.options = $.extend({}, $.fn.twbsPagination.defaults, options);
        this.init(this.options);
    };

    TwbsPagination.prototype = {

        constructor: TwbsPagination,

        init: function (options) {
            this.options = $.extend({}, this.options, options);

            this.currentPages = this.getPages(this.options.startPage);

            if (this.options.startPage < 1 || this.options.startPage > this.options.totalPages) {
                throw new Error('Start page option is incorrect');
            }

            if (this.options.totalPages <= 0) {
                throw new Error('Total pages option cannot be less 1 (one)!');
            }

            if (!$.isNumeric(this.options.visiblePages) && !this.options.visiblePages) {
                this.options.visiblePages = this.options.totalPages;
            }

            if (this.options.onPageClick instanceof Function) {
                this.$element.bind('page', this.options.onPageClick);
            }

            var tagName = (typeof this.$element.prop === 'function') ?
                this.$element.prop('tagName') : this.$element.attr('tagName');

            if (tagName === 'UL') {
                this.$listContainer = this.$element;
            } else {
                this.$listContainer = $('
    '); } this.$listContainer.addClass(this.options.paginationClass); this.$listContainer.append(this.buildListItems(this.currentPages.numeric)); if (tagName !== 'UL') { this.$element.append(this.$listContainer); } this.render(this.currentPages); this.setupEvents(); this.$element.trigger('page', this.options.startPage); }, show: function (page) { if (page < 1 || page > this.options.totalPages) { throw new Error('Page is incorrect.'); } this.render(this.getPages(page)); this.setupEvents(); this.$element.trigger('page', page); }, buildListItems: function (pages) { var $listItems = $(); if (this.options.first) { $listItems = $listItems.add(this.buildItem('first', 1)); } if (this.options.prev) { $listItems = $listItems.add(this.buildItem('prev', 1)); } for (var i = 0; i < pages.length; i++) { $listItems = $listItems.add(this.buildItem('page', pages[i])); } if (this.options.next) { $listItems = $listItems.add(this.buildItem('next', 2)); } if (this.options.last) { $listItems = $listItems.add(this.buildItem('last', this.options.totalPages)); } return $listItems; }, buildItem: function (type, page) { var itemContainer = $('
  • '), itemContent = $(''), itemText = null; itemContainer.addClass(type); itemContainer.attr('data-page', page); switch (type) { case 'page': itemText = page; break; case 'first': itemText = this.options.first; break; case 'prev': itemText = this.options.prev; break; case 'next': itemText = this.options.next; break; case 'last': itemText = this.options.last; break; default: break; } itemContainer.append(itemContent.attr('href', this.href(page)).text(itemText)); return itemContainer; }, getPages: function (currentPage) { var pages = []; var half = Math.floor(this.options.visiblePages / 2); var start = currentPage - half + 1 - this.options.visiblePages % 2; var end = currentPage + half; // handle boundary case if (start <= 0) { start = 1; end = this.options.visiblePages; } if (end > this.options.totalPages) { start = this.options.totalPages - this.options.visiblePages + 1; end = this.options.totalPages; } var itPage = start; while (itPage <= end) { pages.push(itPage); itPage++; } return {"currentPage": currentPage, "numeric": pages}; }, render: function (pages) { if (!this.equals(this.currentPages.numeric, pages.numeric)) { this.$listContainer.children().remove(); this.$listContainer.append(this.buildListItems(pages.numeric)); this.currentPages = pages; } this.$listContainer.find('.page').removeClass('active'); this.$listContainer.find('.page').filter('[data-page="' + pages.currentPage + '"]').addClass('active'); this.$listContainer.find('.first') .toggleClass('disabled', pages.currentPage === 1); this.$listContainer.find('.last') .toggleClass('disabled', pages.currentPage === this.options.totalPages); var prev = pages.currentPage - 1; this.$listContainer.find('.prev') .toggleClass('disabled', pages.currentPage === 1) .data('page', prev > 1 ? prev : 1); var next = pages.currentPage + 1; this.$listContainer.find('.next') .toggleClass('disabled', pages.currentPage === this.options.totalPages) .data('page', next < this.options.totalPages ? next : this.options.totalPages); }, setupEvents: function () { var base = this; this.$listContainer.find('li').each(function () { var $this = $(this); $this.off(); if ($this.hasClass('disabled') || $this.hasClass('active')) return; $this.click(function () { base.show(parseInt($this.data('page'), 10)); }); }); }, equals: function (arr1, arr2) { var i = 0; while ((i < arr1.length) || (i < arr2.length)) { if (arr1[i] !== arr2[i]) { return false; } i++; } return true; }, href: function (c) { return this.options.href.replace(this.options.hrefVariable, c); } }; // PLUGIN DEFINITION $.fn.twbsPagination = function (option) { var args = Array.prototype.slice.call(arguments, 1); var methodReturn; var $set = this.each(function () { var $this = $(this); var data = $this.data('twbs-pagination'); var options = typeof option === 'object' && option; if (!data) $this.data('twbs-pagination', (data = new TwbsPagination(this, options) )); if (typeof option === 'string') methodReturn = data[ option ].apply(data, args); }); return ( methodReturn === undefined ) ? $set : methodReturn; }; $.fn.twbsPagination.defaults = { totalPages: 0, startPage: 1, visiblePages: 5, href: 'javascript:void(0);', hrefVariable: '{{number}}', first: 'First', prev: 'Previous', next: 'Next', last: 'Last', paginationClass: 'pagination', onPageClick: null }; $.fn.twbsPagination.Constructor = TwbsPagination; $.fn.twbsPagination.noConflict = function () { $.fn.twbsPagination = old; return this; }; })(jQuery, window, document);

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