298 lines
12 KiB
JavaScript
298 lines
12 KiB
JavaScript
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/*! Widget: stickyHeaders - updated 5/1/2016 (v2.26.0) *//*
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* Requires tablesorter v2.8+ and jQuery 1.4.3+
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* by Rob Garrison
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*/
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;(function ($, window) {
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'use strict';
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var ts = $.tablesorter || {};
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$.extend(ts.css, {
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sticky : 'tablesorter-stickyHeader', // stickyHeader
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stickyVis : 'tablesorter-sticky-visible',
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stickyHide: 'tablesorter-sticky-hidden',
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stickyWrap: 'tablesorter-sticky-wrapper'
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});
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// Add a resize event to table headers
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ts.addHeaderResizeEvent = function(table, disable, settings) {
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table = $(table)[0]; // make sure we're using a dom element
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if ( !table.config ) { return; }
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var defaults = {
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timer : 250
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},
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options = $.extend({}, defaults, settings),
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c = table.config,
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wo = c.widgetOptions,
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checkSizes = function( triggerEvent ) {
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var index, headers, $header, sizes, width, height,
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len = c.$headers.length;
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wo.resize_flag = true;
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headers = [];
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for ( index = 0; index < len; index++ ) {
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$header = c.$headers.eq( index );
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sizes = $header.data( 'savedSizes' ) || [ 0, 0 ]; // fixes #394
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width = $header[0].offsetWidth;
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height = $header[0].offsetHeight;
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if ( width !== sizes[0] || height !== sizes[1] ) {
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$header.data( 'savedSizes', [ width, height ] );
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headers.push( $header[0] );
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}
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}
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if ( headers.length && triggerEvent !== false ) {
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c.$table.triggerHandler( 'resize', [ headers ] );
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}
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wo.resize_flag = false;
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};
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clearInterval(wo.resize_timer);
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if (disable) {
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wo.resize_flag = false;
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return false;
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}
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checkSizes( false );
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wo.resize_timer = setInterval(function() {
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if (wo.resize_flag) { return; }
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checkSizes();
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}, options.timer);
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};
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// Sticky headers based on this awesome article:
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// http://css-tricks.com/13465-persistent-headers/
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// and https://github.com/jmosbech/StickyTableHeaders by Jonas Mosbech
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// **************************
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ts.addWidget({
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id: 'stickyHeaders',
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priority: 60, // sticky widget must be initialized after the filter widget!
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options: {
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stickyHeaders : '', // extra class name added to the sticky header row
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stickyHeaders_attachTo : null, // jQuery selector or object to attach sticky header to
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stickyHeaders_xScroll : null, // jQuery selector or object to monitor horizontal scroll position (defaults: xScroll > attachTo > window)
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stickyHeaders_yScroll : null, // jQuery selector or object to monitor vertical scroll position (defaults: yScroll > attachTo > window)
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stickyHeaders_offset : 0, // number or jquery selector targeting the position:fixed element
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stickyHeaders_filteredToTop: true, // scroll table top into view after filtering
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stickyHeaders_cloneId : '-sticky', // added to table ID, if it exists
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stickyHeaders_addResizeEvent : true, // trigger 'resize' event on headers
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stickyHeaders_includeCaption : true, // if false and a caption exist, it won't be included in the sticky header
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stickyHeaders_zIndex : 2 // The zIndex of the stickyHeaders, allows the user to adjust this to their needs
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},
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format: function(table, c, wo) {
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// filter widget doesn't initialize on an empty table. Fixes #449
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if ( c.$table.hasClass('hasStickyHeaders') || ($.inArray('filter', c.widgets) >= 0 && !c.$table.hasClass('hasFilters')) ) {
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return;
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}
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var index, len, $t,
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$table = c.$table,
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// add position: relative to attach element, hopefully it won't cause trouble.
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$attach = $(wo.stickyHeaders_attachTo),
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namespace = c.namespace + 'stickyheaders ',
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// element to watch for the scroll event
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$yScroll = $(wo.stickyHeaders_yScroll || wo.stickyHeaders_attachTo || window),
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$xScroll = $(wo.stickyHeaders_xScroll || wo.stickyHeaders_attachTo || window),
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$thead = $table.children('thead:first'),
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$header = $thead.children('tr').not('.sticky-false').children(),
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$tfoot = $table.children('tfoot'),
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$stickyOffset = isNaN(wo.stickyHeaders_offset) ? $(wo.stickyHeaders_offset) : '',
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stickyOffset = $stickyOffset.length ? $stickyOffset.height() || 0 : parseInt(wo.stickyHeaders_offset, 10) || 0,
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// is this table nested? If so, find parent sticky header wrapper (div, not table)
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$nestedSticky = $table.parent().closest('.' + ts.css.table).hasClass('hasStickyHeaders') ?
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$table.parent().closest('table.tablesorter')[0].config.widgetOptions.$sticky.parent() : [],
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nestedStickyTop = $nestedSticky.length ? $nestedSticky.height() : 0,
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// clone table, then wrap to make sticky header
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$stickyTable = wo.$sticky = $table.clone()
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.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders + ' ' + c.namespace.slice(1) + '_extra_table' )
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.wrap('<div class="' + ts.css.stickyWrap + '">'),
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$stickyWrap = $stickyTable.parent()
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.addClass(ts.css.stickyHide)
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.css({
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position : $attach.length ? 'absolute' : 'fixed',
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padding : parseInt( $stickyTable.parent().parent().css('padding-left'), 10 ),
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top : stickyOffset + nestedStickyTop,
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left : 0,
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visibility : 'hidden',
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zIndex : wo.stickyHeaders_zIndex || 2
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}),
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$stickyThead = $stickyTable.children('thead:first'),
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$stickyCells,
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laststate = '',
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spacing = 0,
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setWidth = function($orig, $clone){
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var index, width, border, $cell, $this,
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$cells = $orig.filter(':visible'),
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len = $cells.length;
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for ( index = 0; index < len; index++ ) {
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$cell = $clone.filter(':visible').eq(index);
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$this = $cells.eq(index);
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// code from https://github.com/jmosbech/StickyTableHeaders
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if ($this.css('box-sizing') === 'border-box') {
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width = $this.outerWidth();
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} else {
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if ($cell.css('border-collapse') === 'collapse') {
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if (window.getComputedStyle) {
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width = parseFloat( window.getComputedStyle($this[0], null).width );
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} else {
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// ie8 only
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border = parseFloat( $this.css('border-width') );
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width = $this.outerWidth() - parseFloat( $this.css('padding-left') ) - parseFloat( $this.css('padding-right') ) - border;
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}
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} else {
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width = $this.width();
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}
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}
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$cell.css({
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'width': width,
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'min-width': width,
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'max-width': width
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});
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}
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},
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resizeHeader = function() {
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stickyOffset = $stickyOffset.length ? $stickyOffset.height() || 0 : parseInt(wo.stickyHeaders_offset, 10) || 0;
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spacing = 0;
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$stickyWrap.css({
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left : $attach.length ? parseInt($attach.css('padding-left'), 10) || 0 :
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$table.offset().left - parseInt($table.css('margin-left'), 10) - $xScroll.scrollLeft() - spacing,
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width: $table.outerWidth()
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});
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setWidth( $table, $stickyTable );
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setWidth( $header, $stickyCells );
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},
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scrollSticky = function( resizing ) {
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if (!$table.is(':visible')) { return; } // fixes #278
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// Detect nested tables - fixes #724
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nestedStickyTop = $nestedSticky.length ? $nestedSticky.offset().top - $yScroll.scrollTop() + $nestedSticky.height() : 0;
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var offset = $table.offset(),
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yWindow = $.isWindow( $yScroll[0] ), // $.isWindow needs jQuery 1.4.3
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xWindow = $.isWindow( $xScroll[0] ),
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attachTop = $attach.length ?
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( yWindow ? $yScroll.scrollTop() : $yScroll.offset().top ) :
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$yScroll.scrollTop(),
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captionHeight = wo.stickyHeaders_includeCaption ? 0 : $table.children( 'caption' ).height() || 0,
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scrollTop = attachTop + stickyOffset + nestedStickyTop - captionHeight,
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tableHeight = $table.height() - ($stickyWrap.height() + ($tfoot.height() || 0)) - captionHeight,
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isVisible = ( scrollTop > offset.top ) && ( scrollTop < offset.top + tableHeight ) ? 'visible' : 'hidden',
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cssSettings = { visibility : isVisible };
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if ($attach.length) {
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cssSettings.top = yWindow ? scrollTop - $attach.offset().top : $attach.scrollTop();
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}
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if (xWindow) {
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// adjust when scrolling horizontally - fixes issue #143
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cssSettings.left = $table.offset().left - parseInt($table.css('margin-left'), 10) - $xScroll.scrollLeft() - spacing;
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}
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if ($nestedSticky.length) {
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cssSettings.top = ( cssSettings.top || 0 ) + stickyOffset + nestedStickyTop;
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}
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$stickyWrap
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.removeClass( ts.css.stickyVis + ' ' + ts.css.stickyHide )
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.addClass( isVisible === 'visible' ? ts.css.stickyVis : ts.css.stickyHide )
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.css(cssSettings);
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if (isVisible !== laststate || resizing) {
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// make sure the column widths match
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resizeHeader();
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laststate = isVisible;
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}
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};
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// only add a position relative if a position isn't already defined
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if ($attach.length && !$attach.css('position')) {
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$attach.css('position', 'relative');
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}
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// fix clone ID, if it exists - fixes #271
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if ($stickyTable.attr('id')) { $stickyTable[0].id += wo.stickyHeaders_cloneId; }
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// clear out cloned table, except for sticky header
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// include caption & filter row (fixes #126 & #249) - don't remove cells to get correct cell indexing
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$stickyTable.find('thead:gt(0), tr.sticky-false').hide();
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$stickyTable.find('tbody, tfoot').remove();
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$stickyTable.find('caption').toggle(wo.stickyHeaders_includeCaption);
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// issue #172 - find td/th in sticky header
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$stickyCells = $stickyThead.children().children();
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$stickyTable.css({ height:0, width:0, margin: 0 });
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// remove resizable block
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$stickyCells.find('.' + ts.css.resizer).remove();
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// update sticky header class names to match real header after sorting
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$table
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.addClass('hasStickyHeaders')
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.bind('pagerComplete' + namespace, function() {
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resizeHeader();
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});
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ts.bindEvents(table, $stickyThead.children().children('.' + ts.css.header));
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// add stickyheaders AFTER the table. If the table is selected by ID, the original one (first) will be returned.
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$table.after( $stickyWrap );
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// onRenderHeader is defined, we need to do something about it (fixes #641)
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if (c.onRenderHeader) {
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$t = $stickyThead.children('tr').children();
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len = $t.length;
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for ( index = 0; index < len; index++ ) {
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// send second parameter
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c.onRenderHeader.apply( $t.eq( index ), [ index, c, $stickyTable ] );
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}
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}
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// make it sticky!
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$xScroll.add($yScroll)
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.unbind( ('scroll resize '.split(' ').join( namespace )).replace(/\s+/g, ' ') )
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.bind('scroll resize '.split(' ').join( namespace ), function( event ) {
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scrollSticky( event.type === 'resize' );
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});
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c.$table
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.unbind('stickyHeadersUpdate' + namespace)
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.bind('stickyHeadersUpdate' + namespace, function(){
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scrollSticky( true );
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});
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if (wo.stickyHeaders_addResizeEvent) {
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ts.addHeaderResizeEvent(table);
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}
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// look for filter widget
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if ($table.hasClass('hasFilters') && wo.filter_columnFilters) {
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// scroll table into view after filtering, if sticky header is active - #482
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$table.bind('filterEnd' + namespace, function() {
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// $(':focus') needs jQuery 1.6+
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var $td = $(document.activeElement).closest('td'),
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column = $td.parent().children().index($td);
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// only scroll if sticky header is active
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if ($stickyWrap.hasClass(ts.css.stickyVis) && wo.stickyHeaders_filteredToTop) {
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// scroll to original table (not sticky clone)
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window.scrollTo(0, $table.position().top);
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// give same input/select focus; check if c.$filters exists; fixes #594
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if (column >= 0 && c.$filters) {
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c.$filters.eq(column).find('a, select, input').filter(':visible').focus();
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}
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}
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});
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ts.filter.bindSearch( $table, $stickyCells.find('.' + ts.css.filter) );
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// support hideFilters
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if (wo.filter_hideFilters) {
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ts.filter.hideFilters(c, $stickyTable);
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}
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}
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// resize table (Firefox)
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if (wo.stickyHeaders_addResizeEvent) {
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$table.bind('resize' + c.namespace + 'stickyheaders', function() {
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resizeHeader();
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});
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}
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$table.triggerHandler('stickyHeadersInit');
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},
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remove: function(table, c, wo) {
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var namespace = c.namespace + 'stickyheaders ';
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c.$table
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.removeClass('hasStickyHeaders')
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.unbind( ('pagerComplete resize filterEnd stickyHeadersUpdate '.split(' ').join(namespace)).replace(/\s+/g, ' ') )
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.next('.' + ts.css.stickyWrap).remove();
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if (wo.$sticky && wo.$sticky.length) { wo.$sticky.remove(); } // remove cloned table
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$(window)
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.add(wo.stickyHeaders_xScroll)
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.add(wo.stickyHeaders_yScroll)
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.add(wo.stickyHeaders_attachTo)
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.unbind( ('scroll resize '.split(' ').join(namespace)).replace(/\s+/g, ' ') );
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ts.addHeaderResizeEvent(table, true);
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}
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});
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})(jQuery, window);
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