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Plugins/features/conditionalPageLength/dataTables.conditionalPageL...

107 lines
3.7 KiB
JavaScript

/*! © SpryMedia Ltd, Garrett Hyder - datatables.net/license */
import jQuery from 'jquery';
import DataTable from 'datatables.net';
// Allow reassignment of the $ variable
let $ = jQuery;
/**
* @summary ConditionalPageLength
* @description Hide the page length control when the amount of pages is <= 1
* @version 1.0.0
* @author Garrett Hyder (https://github.com/garretthyder)
* @copyright Copyright 2020 Garrett Hyder
*
* License MIT - http://datatables.net/license/mit
*
* This feature plugin for DataTables hides the page length control when the amount
* of pages is <= 1. The control can either appear / disappear or fade in / out.
*
* Based off conditionalPaging by Matthew Hasbach (https://github.com/mjhasbach)
* Reference: https://github.com/DataTables/Plugins/blob/master/features/conditionalPaging/dataTables.conditionalPaging.js
*
* @example
* $('#myTable').DataTable({
* conditionalPageLength: true
* });
*
* @example
* $('#myTable').DataTable({
* conditionalPageLength: {
* style: 'fade',
* speed: 500 // optional
* }
* });
*
* Conditionally hide the Page Length options that are less than the current result size.
* @example
* $('#myTable').DataTable({
* conditionalPageLength: {
* conditionalOptions: true
* }
* });
*/
$(document).on('init.dt', function (e, dtSettings) {
if (e.namespace !== 'dt') {
return;
}
var options = dtSettings.oInit.conditionalPageLength ||
DataTable.defaults.conditionalPageLength, lengthMenu = dtSettings.aLengthMenu || DataTable.defaults.lengthMenu, lengthMenuValues = Array.isArray(lengthMenu[0])
? lengthMenu[0]
: lengthMenu;
lengthMenuValues = lengthMenuValues.filter(function (n) {
return n > 0;
});
var smallestLength = Math.min.apply(Math, lengthMenuValues);
if ($.isPlainObject(options) || options === true) {
var config = $.isPlainObject(options) ? options : {}, api = new DataTable.Api(dtSettings), speed = 500, conditionalPageLength = function (e) {
var $paging = $(api.table().container()).find('div.dt-length'), pages = api.page.info().pages, size = api.rows({ search: 'applied' }).count();
if (e instanceof $.Event) {
if (pages <= 1 && size <= smallestLength) {
if (config.style === 'fade') {
$paging.stop().fadeTo(speed, 0);
}
else {
$paging.css('visibility', 'hidden');
}
}
else {
if (config.style === 'fade') {
$paging.stop().fadeTo(speed, 1);
}
else {
$paging.css('visibility', '');
}
}
}
else if (pages <= 1 && size <= smallestLength) {
if (config.style === 'fade') {
$paging.css('opacity', 0);
}
else {
$paging.css('visibility', 'hidden');
}
}
if (config.conditionalOptions) {
$paging.find('select option').each(function (index) {
if (parseInt($(this).attr('value'), 10) > size) {
$(this).hide();
}
else {
$(this).show();
}
});
}
};
if (config.speed !== undefined) {
speed = config.speed;
}
conditionalPageLength(null);
api.on('draw.dt', conditionalPageLength);
}
});
export default DataTable;