1042 lines
28 KiB
JavaScript
1042 lines
28 KiB
JavaScript
/*! FixedHeader 3.2.1
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* ©2009-2021 SpryMedia Ltd - datatables.net/license
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*/
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/**
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* @summary FixedHeader
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* @description Fix a table's header or footer, so it is always visible while
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* scrolling
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* @version 3.2.1
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* @file dataTables.fixedHeader.js
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* @author SpryMedia Ltd (www.sprymedia.co.uk)
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* @contact www.sprymedia.co.uk/contact
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* @copyright Copyright 2009-2021 SpryMedia Ltd.
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*
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* This source file is free software, available under the following license:
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* MIT license - http://datatables.net/license/mit
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*
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* This source file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
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*
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* For details please refer to: http://www.datatables.net
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*/
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(function( factory ){
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if ( typeof define === 'function' && define.amd ) {
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// AMD
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define( ['jquery', 'datatables.net'], function ( $ ) {
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return factory( $, window, document );
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} );
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}
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else if ( typeof exports === 'object' ) {
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// CommonJS
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module.exports = function (root, $) {
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if ( ! root ) {
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root = window;
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}
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if ( ! $ || ! $.fn.dataTable ) {
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$ = require('datatables.net')(root, $).$;
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}
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return factory( $, root, root.document );
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};
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}
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else {
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// Browser
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factory( jQuery, window, document );
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}
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}(function( $, window, document, undefined ) {
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'use strict';
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var DataTable = $.fn.dataTable;
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var _instCounter = 0;
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var FixedHeader = function ( dt, config ) {
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// Sanity check - you just know it will happen
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if ( ! (this instanceof FixedHeader) ) {
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throw "FixedHeader must be initialised with the 'new' keyword.";
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}
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// Allow a boolean true for defaults
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if ( config === true ) {
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config = {};
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}
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dt = new DataTable.Api( dt );
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this.c = $.extend( true, {}, FixedHeader.defaults, config );
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this.s = {
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dt: dt,
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position: {
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theadTop: 0,
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tbodyTop: 0,
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tfootTop: 0,
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tfootBottom: 0,
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width: 0,
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left: 0,
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tfootHeight: 0,
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theadHeight: 0,
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windowHeight: $(window).height(),
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visible: true
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},
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headerMode: null,
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footerMode: null,
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autoWidth: dt.settings()[0].oFeatures.bAutoWidth,
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namespace: '.dtfc'+(_instCounter++),
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scrollLeft: {
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header: -1,
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footer: -1
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},
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enable: true
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};
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this.dom = {
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floatingHeader: null,
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thead: $(dt.table().header()),
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tbody: $(dt.table().body()),
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tfoot: $(dt.table().footer()),
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header: {
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host: null,
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floating: null,
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floatingParent: $('<div class="dtfh-floatingparent">'),
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placeholder: null
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},
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footer: {
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host: null,
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floating: null,
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floatingParent: $('<div class="dtfh-floatingparent">'),
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placeholder: null
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}
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};
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this.dom.header.host = this.dom.thead.parent();
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this.dom.footer.host = this.dom.tfoot.parent();
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var dtSettings = dt.settings()[0];
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if ( dtSettings._fixedHeader ) {
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throw "FixedHeader already initialised on table "+dtSettings.nTable.id;
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}
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dtSettings._fixedHeader = this;
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this._constructor();
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};
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/*
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* Variable: FixedHeader
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* Purpose: Prototype for FixedHeader
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* Scope: global
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*/
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$.extend( FixedHeader.prototype, {
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* API methods
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*/
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/**
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* Kill off FH and any events
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*/
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destroy: function () {
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this.s.dt.off( '.dtfc' );
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$(window).off( this.s.namespace );
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if ( this.c.header ) {
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this._modeChange( 'in-place', 'header', true );
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}
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if ( this.c.footer && this.dom.tfoot.length ) {
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this._modeChange( 'in-place', 'footer', true );
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}
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},
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/**
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* Enable / disable the fixed elements
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*
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* @param {boolean} enable `true` to enable, `false` to disable
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*/
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enable: function ( enable, update )
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{
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this.s.enable = enable;
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if ( update || update === undefined ) {
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this._positions();
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this._scroll( true );
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}
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},
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/**
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* Get enabled status
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*/
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enabled: function ()
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{
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return this.s.enable;
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},
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/**
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* Set header offset
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*
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* @param {int} new value for headerOffset
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*/
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headerOffset: function ( offset )
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{
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if ( offset !== undefined ) {
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this.c.headerOffset = offset;
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this.update();
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}
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return this.c.headerOffset;
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},
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/**
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* Set footer offset
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*
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* @param {int} new value for footerOffset
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*/
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footerOffset: function ( offset )
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{
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if ( offset !== undefined ) {
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this.c.footerOffset = offset;
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this.update();
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}
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return this.c.footerOffset;
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},
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/**
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* Recalculate the position of the fixed elements and force them into place
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*/
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update: function (force)
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{
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var table = this.s.dt.table().node();
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if ( $(table).is(':visible') ) {
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this.enable( true, false );
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}
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else {
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this.enable( false, false );
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}
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// Don't update if header is not in the document atm (due to
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// async events)
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if ($(table).children('thead').length === 0) {
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return;
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}
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this._positions();
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this._scroll( force !== undefined ? force : true );
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},
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Constructor
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*/
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/**
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* FixedHeader constructor - adding the required event listeners and
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* simple initialisation
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*
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* @private
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*/
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_constructor: function ()
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{
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var that = this;
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var dt = this.s.dt;
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$(window)
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.on( 'scroll'+this.s.namespace, function () {
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that._scroll();
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} )
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.on( 'resize'+this.s.namespace, DataTable.util.throttle( function () {
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that.s.position.windowHeight = $(window).height();
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that.update();
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}, 50 ) );
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var autoHeader = $('.fh-fixedHeader');
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if ( ! this.c.headerOffset && autoHeader.length ) {
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this.c.headerOffset = autoHeader.outerHeight();
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}
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var autoFooter = $('.fh-fixedFooter');
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if ( ! this.c.footerOffset && autoFooter.length ) {
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this.c.footerOffset = autoFooter.outerHeight();
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}
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dt
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.on( 'column-reorder.dt.dtfc column-visibility.dt.dtfc column-sizing.dt.dtfc responsive-display.dt.dtfc', function (e, ctx) {
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that.update();
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} )
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.on( 'draw.dt.dtfc', function (e, ctx) {
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// For updates from our own table, don't reclone, but for all others, do
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that.update(ctx === dt.settings()[0] ? false : true);
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} );
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dt.on( 'destroy.dtfc', function () {
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that.destroy();
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} );
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this._positions();
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this._scroll();
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},
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Private methods
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*/
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/**
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* Clone a fixed item to act as a place holder for the original element
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* which is moved into a clone of the table element, and moved around the
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* document to give the fixed effect.
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*
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* @param {string} item 'header' or 'footer'
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* @param {boolean} force Force the clone to happen, or allow automatic
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* decision (reuse existing if available)
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* @private
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*/
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_clone: function ( item, force )
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{
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var dt = this.s.dt;
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var itemDom = this.dom[ item ];
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var itemElement = item === 'header' ?
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this.dom.thead :
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this.dom.tfoot;
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// If footer and scrolling is enabled then we don't clone
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// Instead the table's height is decreased accordingly - see `_scroll()`
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if (item === 'footer' && this._scrollEnabled()) {
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return;
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}
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if ( ! force && itemDom.floating ) {
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// existing floating element - reuse it
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itemDom.floating.removeClass( 'fixedHeader-floating fixedHeader-locked' );
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}
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else {
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if ( itemDom.floating ) {
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if(itemDom.placeholder !== null) {
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itemDom.placeholder.remove();
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}
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this._unsize( item );
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itemDom.floating.children().detach();
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itemDom.floating.remove();
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}
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var tableNode = $(dt.table().node());
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var scrollBody = $(tableNode.parent());
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var scrollEnabled = this._scrollEnabled();
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itemDom.floating = $( dt.table().node().cloneNode( false ) )
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.attr( 'aria-hidden', 'true' )
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.css({
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'table-layout': 'fixed',
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top: 0,
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left: 0
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})
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.removeAttr( 'id' )
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.append( itemElement );
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itemDom.floatingParent
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.css({
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width: scrollBody.width(),
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overflow: 'hidden',
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height: 'fit-content',
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position: 'fixed',
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left: scrollEnabled ? tableNode.offset().left + scrollBody.scrollLeft() : 0
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})
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.css(
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item === 'header' ?
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{
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top: this.c.headerOffset,
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bottom: ''
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} :
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{
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top: '',
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bottom: this.c.footerOffset
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}
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)
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.addClass(item === 'footer' ? 'dtfh-floatingparentfoot' : 'dtfh-floatingparenthead')
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.append(itemDom.floating)
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.appendTo( 'body' );
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this._stickyPosition(itemDom.floating, '-');
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var scrollLeftUpdate = () => {
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var scrollLeft = scrollBody.scrollLeft()
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this.s.scrollLeft = {footer: scrollLeft, header: scrollLeft};
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itemDom.floatingParent.scrollLeft(this.s.scrollLeft.header);
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}
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scrollLeftUpdate();
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scrollBody.scroll(scrollLeftUpdate)
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// Insert a fake thead/tfoot into the DataTable to stop it jumping around
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itemDom.placeholder = itemElement.clone( false );
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itemDom.placeholder
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.find( '*[id]' )
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.removeAttr( 'id' );
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itemDom.host.prepend( itemDom.placeholder );
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// Clone widths
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this._matchWidths( itemDom.placeholder, itemDom.floating );
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}
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},
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/**
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* This method sets the sticky position of the header elements to match fixed columns
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* @param {JQuery<HTMLElement>} el
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* @param {string} sign
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*/
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_stickyPosition(el, sign) {
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if (this._scrollEnabled()) {
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var that = this
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var rtl = $(that.s.dt.table().node()).css('direction') === 'rtl';
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el.find('th').each(function() {
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// Find out if fixed header has previously set this column
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if ($(this).css('position') === 'sticky') {
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var right = $(this).css('right');
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var left = $(this).css('left');
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if (right !== 'auto' && !rtl) {
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// New position either adds or dismisses the barWidth
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var potential = +right.replace(/px/g, '') + (sign === '-' ? -1 : 1) * that.s.dt.settings()[0].oBrowser.barWidth;
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$(this).css('right', potential > 0 ? potential : 0);
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}
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else if(left !== 'auto' && rtl) {
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var potential = +left.replace(/px/g, '') + (sign === '-' ? -1 : 1) * that.s.dt.settings()[0].oBrowser.barWidth;
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$(this).css('left', potential > 0 ? potential : 0);
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}
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}
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});
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}
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},
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/**
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* Copy widths from the cells in one element to another. This is required
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* for the footer as the footer in the main table takes its sizes from the
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* header columns. That isn't present in the footer so to have it still
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* align correctly, the sizes need to be copied over. It is also required
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* for the header when auto width is not enabled
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*
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* @param {jQuery} from Copy widths from
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* @param {jQuery} to Copy widths to
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* @private
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*/
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_matchWidths: function ( from, to ) {
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var get = function ( name ) {
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return $(name, from)
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.map( function () {
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return $(this).css('width').replace(/[^\d\.]/g, '') * 1;
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} ).toArray();
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};
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var set = function ( name, toWidths ) {
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$(name, to).each( function ( i ) {
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$(this).css( {
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width: toWidths[i],
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minWidth: toWidths[i]
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} );
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} );
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};
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var thWidths = get( 'th' );
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var tdWidths = get( 'td' );
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set( 'th', thWidths );
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set( 'td', tdWidths );
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},
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/**
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* Remove assigned widths from the cells in an element. This is required
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* when inserting the footer back into the main table so the size is defined
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* by the header columns and also when auto width is disabled in the
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* DataTable.
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*
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* @param {string} item The `header` or `footer`
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* @private
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*/
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_unsize: function ( item ) {
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var el = this.dom[ item ].floating;
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if ( el && (item === 'footer' || (item === 'header' && ! this.s.autoWidth)) ) {
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$('th, td', el).css( {
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width: '',
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minWidth: ''
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} );
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}
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else if ( el && item === 'header' ) {
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$('th, td', el).css( 'min-width', '' );
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}
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},
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/**
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* Reposition the floating elements to take account of horizontal page
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* scroll
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*
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* @param {string} item The `header` or `footer`
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* @param {int} scrollLeft Document scrollLeft
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* @private
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*/
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_horizontal: function ( item, scrollLeft )
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{
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var itemDom = this.dom[ item ];
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var position = this.s.position;
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var lastScrollLeft = this.s.scrollLeft;
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if ( itemDom.floating && lastScrollLeft[ item ] !== scrollLeft ) {
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// If scrolling is enabled we need to match the floating header to the body
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if (this._scrollEnabled()) {
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var newScrollLeft = $($(this.s.dt.table().node()).parent()).scrollLeft()
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itemDom.floating.scrollLeft(newScrollLeft);
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itemDom.floatingParent.scrollLeft(newScrollLeft);
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}
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lastScrollLeft[ item ] = scrollLeft;
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}
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},
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/**
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* Change from one display mode to another. Each fixed item can be in one
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* of:
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*
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* * `in-place` - In the main DataTable
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* * `in` - Floating over the DataTable
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* * `below` - (Header only) Fixed to the bottom of the table body
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* * `above` - (Footer only) Fixed to the top of the table body
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*
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* @param {string} mode Mode that the item should be shown in
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* @param {string} item 'header' or 'footer'
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* @param {boolean} forceChange Force a redraw of the mode, even if already
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* in that mode.
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* @private
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*/
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_modeChange: function ( mode, item, forceChange )
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{
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var dt = this.s.dt;
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var itemDom = this.dom[ item ];
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var position = this.s.position;
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// Just determine if scroll is enabled once
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var scrollEnabled = this._scrollEnabled();
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|
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// If footer and scrolling is enabled then we don't clone
|
|
// Instead the table's height is decreased accordingly - see `_scroll()`
|
|
if (item === 'footer' && scrollEnabled) {
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return;
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}
|
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|
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// It isn't trivial to add a !important css attribute...
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var importantWidth = function (w) {
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itemDom.floating.attr('style', function(i,s) {
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return (s || '') + 'width: '+w+'px !important;';
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});
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|
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// If not scrolling also have to update the floatingParent
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if (!scrollEnabled) {
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itemDom.floatingParent.attr('style', function(i,s) {
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return (s || '') + 'width: '+w+'px !important;';
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});
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}
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};
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|
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// Record focus. Browser's will cause input elements to loose focus if
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// they are inserted else where in the doc
|
|
var tablePart = this.dom[ item==='footer' ? 'tfoot' : 'thead' ];
|
|
var focus = $.contains( tablePart[0], document.activeElement ) ?
|
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document.activeElement :
|
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null;
|
|
var scrollBody = $($(this.s.dt.table().node()).parent());
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|
|
|
if ( mode === 'in-place' ) {
|
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// Insert the header back into the table's real header
|
|
if ( itemDom.placeholder ) {
|
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itemDom.placeholder.remove();
|
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itemDom.placeholder = null;
|
|
}
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this._unsize( item );
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if ( item === 'header' ) {
|
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itemDom.host.prepend( tablePart );
|
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}
|
|
else {
|
|
itemDom.host.append( tablePart );
|
|
}
|
|
|
|
if ( itemDom.floating ) {
|
|
itemDom.floating.remove();
|
|
itemDom.floating = null;
|
|
this._stickyPosition(itemDom.host, '+');
|
|
}
|
|
|
|
if ( itemDom.floatingParent ) {
|
|
itemDom.floatingParent.remove();
|
|
}
|
|
|
|
$($(itemDom.host.parent()).parent()).scrollLeft(scrollBody.scrollLeft())
|
|
}
|
|
else if ( mode === 'in' ) {
|
|
// Remove the header from the read header and insert into a fixed
|
|
// positioned floating table clone
|
|
this._clone( item, forceChange );
|
|
|
|
// Get useful position values
|
|
var scrollOffset = scrollBody.offset();
|
|
var windowTop = $(document).scrollTop();
|
|
var windowHeight = $(window).height();
|
|
var windowBottom = windowTop + windowHeight;
|
|
var bodyTop = scrollEnabled ? scrollOffset.top : position.tbodyTop;
|
|
var bodyBottom = scrollEnabled ? scrollOffset.top + scrollBody.outerHeight() : position.tfootTop
|
|
|
|
// Calculate the amount that the footer or header needs to be shuffled
|
|
var shuffle = item === 'footer' ?
|
|
// footer and top of body isn't on screen
|
|
bodyTop > windowBottom ?
|
|
// Yes - push the footer below
|
|
position.tfootHeight :
|
|
// No - bottom set to the gap between the top of the body and the bottom of the window
|
|
bodyTop + position.tfootHeight - windowBottom :
|
|
// Otherwise must be a header so get the difference from the bottom of the
|
|
// desired floating header and the bottom of the table body
|
|
windowTop + this.c.headerOffset + position.theadHeight - bodyBottom
|
|
|
|
// Set the top or bottom based off of the offset and the shuffle value
|
|
var prop = item === 'header' ? 'top' : 'bottom';
|
|
var val = this.c[item+'Offset'] - (shuffle > 0 ? shuffle : 0);
|
|
|
|
itemDom.floating.addClass( 'fixedHeader-floating' );
|
|
itemDom.floatingParent
|
|
.css(prop, val)
|
|
.css( {
|
|
'left': position.left,
|
|
'height': item === 'header' ? position.theadHeight : position.tfootHeight,
|
|
'z-index': 2
|
|
})
|
|
.append(itemDom.floating);
|
|
|
|
importantWidth(position.width);
|
|
|
|
if ( item === 'footer' ) {
|
|
itemDom.floating.css( 'top', '' );
|
|
}
|
|
}
|
|
else if ( mode === 'below' ) { // only used for the header
|
|
// Fix the position of the floating header at base of the table body
|
|
this._clone( item, forceChange );
|
|
|
|
itemDom.floating.addClass( 'fixedHeader-locked' );
|
|
itemDom.floatingParent.css({
|
|
position: 'absolute',
|
|
top: position.tfootTop - position.theadHeight,
|
|
left: position.left+'px'
|
|
});
|
|
|
|
importantWidth(position.width);
|
|
}
|
|
else if ( mode === 'above' ) { // only used for the footer
|
|
// Fix the position of the floating footer at top of the table body
|
|
this._clone( item, forceChange );
|
|
|
|
itemDom.floating.addClass( 'fixedHeader-locked' );
|
|
itemDom.floatingParent.css({
|
|
position: 'absolute',
|
|
top: position.tbodyTop,
|
|
left: position.left+'px'
|
|
});
|
|
|
|
importantWidth(position.width);
|
|
}
|
|
|
|
// Restore focus if it was lost
|
|
if ( focus && focus !== document.activeElement ) {
|
|
setTimeout( function () {
|
|
focus.focus();
|
|
}, 10 );
|
|
}
|
|
|
|
this.s.scrollLeft.header = -1;
|
|
this.s.scrollLeft.footer = -1;
|
|
this.s[item+'Mode'] = mode;
|
|
},
|
|
|
|
/**
|
|
* Cache the positional information that is required for the mode
|
|
* calculations that FixedHeader performs.
|
|
*
|
|
* @private
|
|
*/
|
|
_positions: function ()
|
|
{
|
|
var dt = this.s.dt;
|
|
var table = dt.table();
|
|
var position = this.s.position;
|
|
var dom = this.dom;
|
|
var tableNode = $(table.node());
|
|
var scrollEnabled = this._scrollEnabled();
|
|
|
|
// Need to use the header and footer that are in the main table,
|
|
// regardless of if they are clones, since they hold the positions we
|
|
// want to measure from
|
|
var thead = $(dt.table().header());
|
|
var tfoot = $(dt.table().footer());
|
|
var tbody = dom.tbody;
|
|
var scrollBody = tableNode.parent();
|
|
|
|
position.visible = tableNode.is(':visible');
|
|
position.width = tableNode.outerWidth();
|
|
position.left = tableNode.offset().left;
|
|
position.theadTop = thead.offset().top;
|
|
position.tbodyTop = scrollEnabled ? scrollBody.offset().top : tbody.offset().top;
|
|
position.tbodyHeight = scrollEnabled ? scrollBody.outerHeight() : tbody.outerHeight();
|
|
position.theadHeight = thead.outerHeight();
|
|
position.theadBottom = position.theadTop + position.theadHeight;
|
|
|
|
if ( tfoot.length ) {
|
|
position.tfootTop = position.tbodyTop + position.tbodyHeight; //tfoot.offset().top;
|
|
position.tfootBottom = position.tfootTop + tfoot.outerHeight();
|
|
position.tfootHeight = tfoot.outerHeight();
|
|
}
|
|
else {
|
|
position.tfootTop = position.tbodyTop + tbody.outerHeight();
|
|
position.tfootBottom = position.tfootTop;
|
|
position.tfootHeight = position.tfootTop;
|
|
}
|
|
},
|
|
|
|
|
|
/**
|
|
* Mode calculation - determine what mode the fixed items should be placed
|
|
* into.
|
|
*
|
|
* @param {boolean} forceChange Force a redraw of the mode, even if already
|
|
* in that mode.
|
|
* @private
|
|
*/
|
|
_scroll: function ( forceChange )
|
|
{
|
|
// ScrollBody details
|
|
var scrollEnabled = this._scrollEnabled();
|
|
var scrollBody = $(this.s.dt.table().node()).parent();
|
|
var scrollOffset = scrollBody.offset();
|
|
var scrollHeight = scrollBody.outerHeight();
|
|
|
|
// Window details
|
|
var windowLeft = $(document).scrollLeft();
|
|
var windowTop = $(document).scrollTop();
|
|
var windowHeight = $(window).height();
|
|
var windowBottom = windowHeight + windowTop
|
|
|
|
|
|
var position = this.s.position;
|
|
var headerMode, footerMode;
|
|
|
|
// Body Details
|
|
var bodyTop = (scrollEnabled ? scrollOffset.top : position.tbodyTop);
|
|
var bodyLeft = (scrollEnabled ? scrollOffset.left : position.left);
|
|
var bodyBottom = (scrollEnabled ? scrollOffset.top + scrollHeight : position.tfootTop);
|
|
var bodyWidth = (scrollEnabled ? scrollBody.outerWidth() : position.tbodyWidth);
|
|
|
|
var windowBottom = windowTop + windowHeight;
|
|
|
|
if ( this.c.header ) {
|
|
if ( ! this.s.enable ) {
|
|
headerMode = 'in-place';
|
|
}
|
|
// The header is in it's normal place if the body top is lower than
|
|
// the scroll of the window plus the headerOffset and the height of the header
|
|
else if ( ! position.visible || windowTop + this.c.headerOffset + position.theadHeight <= bodyTop) {
|
|
headerMode = 'in-place';
|
|
}
|
|
// The header should be floated if
|
|
else if (
|
|
// The scrolling plus the header offset plus the height of the header is lower than the top of the body
|
|
windowTop + this.c.headerOffset + position.theadHeight > bodyTop &&
|
|
// And the scrolling at the top plus the header offset is above the bottom of the body
|
|
windowTop + this.c.headerOffset < bodyBottom
|
|
) {
|
|
headerMode = 'in';
|
|
var scrollBody = $($(this.s.dt.table().node()).parent());
|
|
|
|
// Further to the above, If the scrolling plus the header offset plus the header height is lower
|
|
// than the bottom of the table a shuffle is required so have to force the calculation
|
|
if(windowTop + this.c.headerOffset + position.theadHeight > bodyBottom || this.dom.header.floatingParent === undefined){
|
|
forceChange = true;
|
|
}
|
|
else {
|
|
this.dom.header.floatingParent
|
|
.css({
|
|
'top': this.c.headerOffset,
|
|
'position': 'fixed'
|
|
})
|
|
.append(this.dom.header.floating);
|
|
}
|
|
}
|
|
// Anything else and the view is below the table
|
|
else {
|
|
headerMode = 'below';
|
|
}
|
|
|
|
if ( forceChange || headerMode !== this.s.headerMode ) {
|
|
this._modeChange( headerMode, 'header', forceChange );
|
|
}
|
|
|
|
this._horizontal( 'header', windowLeft );
|
|
}
|
|
|
|
var header = {
|
|
offset: {top: 0, left: 0},
|
|
height: 0
|
|
}
|
|
var footer = {
|
|
offset: {top: 0, left: 0},
|
|
height: 0
|
|
}
|
|
|
|
if ( this.c.footer && this.dom.tfoot.length ) {
|
|
if ( ! this.s.enable ) {
|
|
footerMode = 'in-place';
|
|
}
|
|
else if ( ! position.visible || position.tfootBottom + this.c.footerOffset <= windowBottom ) {
|
|
footerMode = 'in-place';
|
|
}
|
|
else if (
|
|
bodyBottom + position.tfootHeight + this.c.footerOffset > windowBottom &&
|
|
bodyTop + this.c.footerOffset < windowBottom
|
|
) {
|
|
footerMode = 'in';
|
|
forceChange = true;
|
|
}
|
|
else {
|
|
footerMode = 'above';
|
|
}
|
|
|
|
if ( forceChange || footerMode !== this.s.footerMode ) {
|
|
this._modeChange( footerMode, 'footer', forceChange );
|
|
}
|
|
|
|
this._horizontal( 'footer', windowLeft );
|
|
|
|
var getOffsetHeight = (el) => {
|
|
return {
|
|
offset: el.offset(),
|
|
height: el.outerHeight()
|
|
}
|
|
}
|
|
|
|
header = this.dom.header.floating ? getOffsetHeight(this.dom.header.floating) : getOffsetHeight(this.dom.thead);
|
|
footer = this.dom.footer.floating ? getOffsetHeight(this.dom.footer.floating) : getOffsetHeight(this.dom.tfoot);
|
|
|
|
// If scrolling is enabled and the footer is off the screen
|
|
if (scrollEnabled && footer.offset.top > windowTop){// && footer.offset.top >= windowBottom) {
|
|
// Calculate the gap between the top of the scrollBody and the top of the window
|
|
var overlap = windowTop - scrollOffset.top;
|
|
// The new height is the bottom of the window
|
|
var newHeight = windowBottom +
|
|
// If the gap between the top of the scrollbody and the window is more than
|
|
// the height of the header then the top of the table is still visible so add that gap
|
|
// Doing this has effectively calculated the height from the top of the table to the bottom of the current page
|
|
(overlap > -header.height ? overlap : 0) -
|
|
// Take from that
|
|
(
|
|
// The top of the header plus
|
|
header.offset.top +
|
|
// The header height if the standard header is present
|
|
(overlap < -header.height ? header.height : 0) +
|
|
// And the height of the footer
|
|
footer.height
|
|
)
|
|
|
|
// Don't want a negative height
|
|
if (newHeight < 0) {
|
|
newHeight = 0;
|
|
}
|
|
|
|
// At the end of the above calculation the space between the header (top of the page if floating)
|
|
// and the point just above the footer should be the new value for the height of the table.
|
|
scrollBody.outerHeight(newHeight);
|
|
|
|
// Need some rounding here as sometimes very small decimal places are encountered
|
|
// If the actual height is bigger or equal to the height we just applied then the footer is "Floating"
|
|
if(Math.round(scrollBody.outerHeight()) >= Math.round(newHeight)) {
|
|
$(this.dom.tfoot.parent()).addClass("fixedHeader-floating");
|
|
}
|
|
// Otherwise max-width has kicked in so it is not floating
|
|
else {
|
|
$(this.dom.tfoot.parent()).removeClass("fixedHeader-floating");
|
|
}
|
|
}
|
|
}
|
|
|
|
if(this.dom.header.floating){
|
|
this.dom.header.floatingParent.css('left', bodyLeft-windowLeft);
|
|
}
|
|
if(this.dom.footer.floating){
|
|
this.dom.footer.floatingParent.css('left', bodyLeft-windowLeft);
|
|
}
|
|
|
|
// If fixed columns is being used on this table then the blockers need to be copied across
|
|
// Cloning these is cleaner than creating as our own as it will keep consistency with fixedColumns automatically
|
|
// ASSUMING that the class remains the same
|
|
if (this.s.dt.settings()[0]._fixedColumns !== undefined) {
|
|
var adjustBlocker = (side, end, el) => {
|
|
if (el === undefined) {
|
|
let blocker = $('div.dtfc-'+side+'-'+end+'-blocker');
|
|
el = blocker.length === 0 ?
|
|
null :
|
|
blocker.clone().appendTo('body').css('z-index', 1);
|
|
}
|
|
if(el !== null) {
|
|
el.css({
|
|
top: end === 'top' ? header.offset.top : footer.offset.top,
|
|
left: side === 'right' ? bodyLeft + bodyWidth - el.width() : bodyLeft
|
|
});
|
|
}
|
|
|
|
return el;
|
|
}
|
|
|
|
// Adjust all blockers
|
|
this.dom.header.rightBlocker = adjustBlocker('right', 'top', this.dom.header.rightBlocker);
|
|
this.dom.header.leftBlocker = adjustBlocker('left', 'top', this.dom.header.leftBlocker);
|
|
this.dom.footer.rightBlocker = adjustBlocker('right', 'bottom', this.dom.footer.rightBlocker);
|
|
this.dom.footer.leftBlocker = adjustBlocker('left', 'bottom', this.dom.footer.leftBlocker);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Function to check if scrolling is enabled on the table or not
|
|
* @returns Boolean value indicating if scrolling on the table is enabled or not
|
|
*/
|
|
_scrollEnabled: function() {
|
|
var oScroll = this.s.dt.settings()[0].oScroll;
|
|
if(oScroll.sY !== "" || oScroll.sX !== "") {
|
|
return true;
|
|
}
|
|
return false
|
|
}
|
|
} );
|
|
|
|
|
|
/**
|
|
* Version
|
|
* @type {String}
|
|
* @static
|
|
*/
|
|
FixedHeader.version = "3.2.1";
|
|
|
|
/**
|
|
* Defaults
|
|
* @type {Object}
|
|
* @static
|
|
*/
|
|
FixedHeader.defaults = {
|
|
header: true,
|
|
footer: false,
|
|
headerOffset: 0,
|
|
footerOffset: 0
|
|
};
|
|
|
|
|
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
* DataTables interfaces
|
|
*/
|
|
|
|
// Attach for constructor access
|
|
$.fn.dataTable.FixedHeader = FixedHeader;
|
|
$.fn.DataTable.FixedHeader = FixedHeader;
|
|
|
|
|
|
// DataTables creation - check if the FixedHeader option has been defined on the
|
|
// table and if so, initialise
|
|
$(document).on( 'init.dt.dtfh', function (e, settings, json) {
|
|
if ( e.namespace !== 'dt' ) {
|
|
return;
|
|
}
|
|
|
|
var init = settings.oInit.fixedHeader;
|
|
var defaults = DataTable.defaults.fixedHeader;
|
|
|
|
if ( (init || defaults) && ! settings._fixedHeader ) {
|
|
var opts = $.extend( {}, defaults, init );
|
|
|
|
if ( init !== false ) {
|
|
new FixedHeader( settings, opts );
|
|
}
|
|
}
|
|
} );
|
|
|
|
// DataTables API methods
|
|
DataTable.Api.register( 'fixedHeader()', function () {} );
|
|
|
|
DataTable.Api.register( 'fixedHeader.adjust()', function () {
|
|
return this.iterator( 'table', function ( ctx ) {
|
|
var fh = ctx._fixedHeader;
|
|
|
|
if ( fh ) {
|
|
fh.update();
|
|
}
|
|
} );
|
|
} );
|
|
|
|
DataTable.Api.register( 'fixedHeader.enable()', function ( flag ) {
|
|
return this.iterator( 'table', function ( ctx ) {
|
|
var fh = ctx._fixedHeader;
|
|
|
|
flag = ( flag !== undefined ? flag : true );
|
|
if ( fh && flag !== fh.enabled() ) {
|
|
fh.enable( flag );
|
|
}
|
|
} );
|
|
} );
|
|
|
|
DataTable.Api.register( 'fixedHeader.enabled()', function () {
|
|
if ( this.context.length ) {
|
|
var fh = this.context[0]._fixedHeader;
|
|
|
|
if ( fh ) {
|
|
return fh.enabled();
|
|
}
|
|
}
|
|
|
|
return false;
|
|
} );
|
|
|
|
DataTable.Api.register( 'fixedHeader.disable()', function ( ) {
|
|
return this.iterator( 'table', function ( ctx ) {
|
|
var fh = ctx._fixedHeader;
|
|
|
|
if ( fh && fh.enabled() ) {
|
|
fh.enable( false );
|
|
}
|
|
} );
|
|
} );
|
|
|
|
$.each( ['header', 'footer'], function ( i, el ) {
|
|
DataTable.Api.register( 'fixedHeader.'+el+'Offset()', function ( offset ) {
|
|
var ctx = this.context;
|
|
|
|
if ( offset === undefined ) {
|
|
return ctx.length && ctx[0]._fixedHeader ?
|
|
ctx[0]._fixedHeader[el +'Offset']() :
|
|
undefined;
|
|
}
|
|
|
|
return this.iterator( 'table', function ( ctx ) {
|
|
var fh = ctx._fixedHeader;
|
|
|
|
if ( fh ) {
|
|
fh[ el +'Offset' ]( offset );
|
|
}
|
|
} );
|
|
} );
|
|
} );
|
|
|
|
|
|
return FixedHeader;
|
|
}));
|