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104 lines
3.7 KiB
JavaScript
104 lines
3.7 KiB
JavaScript
4 years ago
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/**
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* @summary ConditionalPageLength
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* @description Hide the page length control when the amount of pages is <= 1
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* @version 1.0.0
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* @file dataTables.conditionalPageLength.js
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* @author Garrett Hyder (https://github.com/garretthyder)
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* @contact garrett.m.hyder@gmail.com
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* @copyright Copyright 2020 Garrett Hyder
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*
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* License MIT - http://datatables.net/license/mit
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*
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* This feature plugin for DataTables hides the page length control when the amount
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* of pages is <= 1. The control can either appear / disappear or fade in / out.
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*
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* Based off conditionalPaging by Matthew Hasbach (https://github.com/mjhasbach)
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* Reference: https://github.com/DataTables/Plugins/blob/master/features/conditionalPaging/dataTables.conditionalPaging.js
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*
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* @example
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* $('#myTable').DataTable({
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* conditionalPageLength: true
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* });
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*
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* @example
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* $('#myTable').DataTable({
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* conditionalPageLength: {
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* style: 'fade',
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* speed: 500 // optional
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* }
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* });
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*
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* Conditionally hide the Page Length options that are less than the current result size.
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* @example
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* $('#myTable').DataTable({
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* conditionalPageLength: {
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* conditionalOptions: true
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* }
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* });
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*/
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(function(window, document, $) {
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$(document).on('init.dt', function(e, dtSettings) {
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if ( e.namespace !== 'dt' ) {
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return;
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}
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var options = dtSettings.oInit.conditionalPageLength || $.fn.dataTable.defaults.conditionalPageLength;
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if ($.isPlainObject(options) || options === true) {
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var config = $.isPlainObject(options) ? options : {},
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api = new $.fn.dataTable.Api(dtSettings),
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speed = 'slow',
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conditionalPageLength = function(e) {
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var $paging = $(api.table().container()).find('div.dataTables_length'),
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pages = api.page.info().pages,
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size = api.rows({search:'applied'}).count();
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if (e instanceof $.Event) {
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if (pages <= 1) {
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if (config.style === 'fade') {
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$paging.stop().fadeTo(speed, 0);
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}
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else {
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$paging.css('visibility', 'hidden');
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}
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}
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else {
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if (config.style === 'fade') {
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$paging.stop().fadeTo(speed, 1);
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}
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else {
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$paging.css('visibility', '');
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}
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}
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}
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else if (pages <= 1) {
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if (config.style === 'fade') {
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$paging.css('opacity', 0);
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}
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else {
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$paging.css('visibility', 'hidden');
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}
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}
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if (config.conditionalOptions) {
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$paging.find('select option').each(function(index) {
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if ($(this).attr('value') > size) {
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$(this).hide();
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} else {
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$(this).show();
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}
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});
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}
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};
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if ( config.speed !== undefined ) {
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speed = config.speed;
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}
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conditionalPageLength();
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api.on('draw.dt', conditionalPageLength);
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}
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});
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})(window, document, jQuery);
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