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Plugins/features/lengthLinks/dataTables.lengthLinks.js

91 lines
2.5 KiB
JavaScript

/*! Page length control via links for DataTables
* 2014 SpryMedia Ltd - datatables.net/license
*/
/**
* @summary LengthLinks
* @description Page length control via links for DataTables
* @version 1.1.0
* @file dataTables.searchHighlight.js
* @author SpryMedia Ltd (www.sprymedia.co.uk)
* @contact www.sprymedia.co.uk/contact
* @copyright Copyright 2014 SpryMedia Ltd.
*
* License MIT - http://datatables.net/license/mit
*
* This feature plug-in for DataTables adds page length control links to the
* DataTable. The `dom` option can be used to insert the control using the `L`
* character option and it uses the `lengthMenu` options of DataTables to
* determine what to display.
*
* @example
* $('#myTable').DataTable( {
* dom: 'Lfrtip'
* } );
*
* @example
* $('#myTable').DataTable( {
* lengthMenu: [ [10, 25, 50, -1], [10, 25, 50, "All"] ]
* dom: 'Lfrtip'
* } );
*/
(function(window, document, $, undefined) {
$.fn.dataTable.LengthLinks = function ( inst ) {
var api = new $.fn.dataTable.Api( inst );
var settings = api.settings()[0];
var container = $('<div></div>').addClass( settings.oClasses.sLength );
var lastLength = null;
// API so the feature wrapper can return the node to insert
this.container = function () {
return container[0];
};
// Listen for events to change the page length
container.on( 'click.dtll', 'a', function (e) {
e.preventDefault();
api.page.len( $(this).data('length')*1 ).draw( false );
} );
// Update on each draw
api.on( 'draw', function () {
// No point in updating - nothing has changed
if ( api.page.len() === lastLength ) {
return;
}
var menu = settings.aLengthMenu;
var lang = menu.length===2 && $.isArray(menu[0]) ? menu[1] : menu;
var lens = menu.length===2 && $.isArray(menu[0]) ? menu[0] : menu;
var out = $.map( lens, function (el, i) {
return el == api.page.len() ?
'<a class="active" data-length="'+lens[i]+'">'+lang[i]+'</a>' :
'<a data-length="'+lens[i]+'">'+lang[i]+'</a>';
} );
container.html( settings.oLanguage.sLengthMenu.replace( '_MENU_', out.join(' | ') ) );
lastLength = api.page.len();
} );
api.on( 'destroy', function () {
container.off( 'click.dtll', 'a' );
} );
};
// Subscribe the feature plug-in to DataTables, ready for use
$.fn.dataTable.ext.feature.push( {
"fnInit": function( settings ) {
var l = new $.fn.dataTable.LengthLinks( settings );
return l.container();
},
"cFeature": "L",
"sFeature": "LengthLinks"
} );
})(window, document, jQuery);