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(function($) { |
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'use strict'; |
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|
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var Paginator = function() { |
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return { |
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// Attributes |
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obj: null, |
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options: null, |
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nav: null, |
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|
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// Methods |
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build: function(obj, opts) { |
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this.obj = obj; |
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this.options = opts; |
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|
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if(!this.options.optional || this._totalRows() > this.options.limit) { |
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this._createNavigation(); |
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this._setPage(); |
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} |
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|
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if(this.options.onCreate) this.options.onCreate(obj); |
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|
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return this.obj; |
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}, |
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|
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_createNavigation: function() { |
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this._createNavigationWrapper(); |
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this._createNavigationButtons(); |
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this._appendNavigation(); |
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this._addNavigationCallbacks(); |
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}, |
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_createNavigationWrapper: function() { |
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this.nav = $('<div>', { |
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class: this.options.navigationClass |
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}); |
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}, |
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_createNavigationButtons: function() { |
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// Add 'first' button |
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if(this.options.first) { |
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this._createNavigationButton(this.options.firstText, { |
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'data-first': true |
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}); |
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} |
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|
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// Add 'previous' button |
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if(this.options.previous) { |
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this._createNavigationButton(this.options.previousText, { |
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'data-direction': -1, |
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'data-previous': true |
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}); |
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} |
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|
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// Add page buttons |
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for(var i = 0; i < this._totalPages(); ++i) { |
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this._createNavigationButton(this.options.pageToText(i), { |
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'data-page': i |
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}); |
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} |
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|
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// Add 'next' button |
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if(this.options.next) { |
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this._createNavigationButton(this.options.nextText, { |
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'data-direction': 1, |
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'data-next': true |
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}); |
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} |
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|
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// Add 'last' button |
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if(this.options.last) { |
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this._createNavigationButton(this.options.lastText, { |
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'data-last': true |
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}); |
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} |
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}, |
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_createNavigationButton: function(text, options) { |
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this.nav.append($('<a>', $.extend(options, { href: '#', text: text }))); |
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}, |
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_appendNavigation: function() { |
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// Add the content to the navigation block |
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if(this.options.navigationWrapper) this.options.navigationWrapper.append(this.nav); |
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// Add it after the table |
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else this.obj.after(this.nav); |
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}, |
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_addNavigationCallbacks: function() { |
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var paginator = this; |
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|
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paginator.nav.find('a').click(function(e) { |
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var direction = $(this).data('direction') * 1; |
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|
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// 'First' button |
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if($(this).data('first') !== undefined) { |
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paginator._setPage(0); |
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} |
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// Page button |
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else if ($(this).data('page') !== undefined) { |
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paginator._setPage($(this).data('page') * 1); |
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} |
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// 'Previous' or 'Next' button |
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else if ($(this).data('previous') !== undefined || $(this).data('next') !== undefined) { |
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var page = paginator._currentPage() + direction; |
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if(page >= 0 && page <= paginator._totalPages() - 1) { |
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paginator._setPage(page); |
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} |
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} |
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// 'Last' button |
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else if ($(this).data('last') !== undefined) { |
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paginator._setPage(paginator._totalPages() - 1); |
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} |
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|
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// Handle callback |
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if(paginator.options.onSelect) paginator.options.onSelect(paginator.obj, paginator._currentPage()); |
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e.preventDefault(); |
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return false; |
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}); |
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}, |
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|
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_setPage: function(index) { |
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if(index == undefined) index = this.options.initialPage; |
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|
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// Hide all elements, and then show the current page. |
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this._rows().hide().slice(index * this.options.limit, (index + 1) * this.options.limit).show(); |
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|
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// Set the current button as active |
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this.nav.find('a').removeAttr('data-selected').siblings('a[data-page=' + index + ']') |
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.attr('data-selected', true); |
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}, |
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|
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_currentPage: function() { |
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return this.nav.find('a[data-selected=true]').data('page'); |
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}, |
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_totalRows: function() { |
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// Count the total rows of the selector |
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return this._rows().length; |
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}, |
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_rows: function() { |
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return this.obj.find(this.options.childrenSelector); |
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}, |
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_totalPages: function() { |
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return Math.ceil(this._totalRows() / this.options.limit); |
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} |
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}; |
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}; |
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|
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$.fn.paginate = function(options) { |
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switch(options) { |
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// Example of custom actions: |
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// case 'destroy': return pagination.destroy(this); |
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default: return Paginator().build(this, $.extend( {}, $.fn.paginate.defaults, options)); |
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} |
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}; |
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|
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$.fn.paginate.defaults = { |
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limit: 20, |
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initialPage: 0, |
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|
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previous: true, |
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previousText: '<', |
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next: true, |
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nextText: '>', |
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first: true, |
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firstText: '<<', |
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last: true, |
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lastText: '>>', |
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|
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optional: true, |
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|
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onCreate: null, |
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onSelect: null, |
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|
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childrenSelector: 'tbody > tr', |
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navigationWrapper: null, |
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navigationClass: 'page-navigation', |
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pageToText: function(i) { return (i + 1).toString(); } |
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} |
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|
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}(jQuery)); |
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|
