media/jquery/tablesorter-master/js/widgets/widget-stickyHeaders.js
/*! Widget: stickyHeaders - updated 9/27/2017 (v2.29.0) *//*
* Requires tablesorter v2.8+ and jQuery 1.4.3+
* by Rob Garrison
*/
;(function ($, window) {
'use strict';
var ts = $.tablesorter || {};
$.extend(ts.css, {
sticky : 'tablesorter-stickyHeader', // stickyHeader
stickyVis : 'tablesorter-sticky-visible',
stickyHide: 'tablesorter-sticky-hidden',
stickyWrap: 'tablesorter-sticky-wrapper'
});
// Add a resize event to table headers
ts.addHeaderResizeEvent = function(table, disable, settings) {
table = $(table)[0]; // make sure we're using a dom element
if ( !table.config ) { return; }
var defaults = {
timer : 250
},
options = $.extend({}, defaults, settings),
c = table.config,
wo = c.widgetOptions,
checkSizes = function( triggerEvent ) {
var index, headers, $header, sizes, width, height,
len = c.$headers.length;
wo.resize_flag = true;
headers = [];
for ( index = 0; index < len; index++ ) {
$header = c.$headers.eq( index );
sizes = $header.data( 'savedSizes' ) || [ 0, 0 ]; // fixes #394
width = $header[0].offsetWidth;
height = $header[0].offsetHeight;
if ( width !== sizes[0] || height !== sizes[1] ) {
$header.data( 'savedSizes', [ width, height ] );
headers.push( $header[0] );
}
}
if ( headers.length && triggerEvent !== false ) {
c.$table.triggerHandler( 'resize', [ headers ] );
}
wo.resize_flag = false;
};
clearInterval(wo.resize_timer);
if (disable) {
wo.resize_flag = false;
return false;
}
checkSizes( false );
wo.resize_timer = setInterval(function() {
if (wo.resize_flag) { return; }
checkSizes();
}, options.timer);
};
function getStickyOffset(c, wo) {
var $el = isNaN(wo.stickyHeaders_offset) ? $(wo.stickyHeaders_offset) : [];
return $el.length ?
$el.height() || 0 :
parseInt(wo.stickyHeaders_offset, 10) || 0;
}
// Sticky headers based on this awesome article:
// http://css-tricks.com/13465-persistent-headers/
// and https://github.com/jmosbech/StickyTableHeaders by Jonas Mosbech
// **************************
ts.addWidget({
id: 'stickyHeaders',
priority: 54, // sticky widget must be initialized after the filter & before pager widget!
options: {
stickyHeaders : '', // extra class name added to the sticky header row
stickyHeaders_appendTo : null, // jQuery selector or object to phycially attach the sticky headers
stickyHeaders_attachTo : null, // jQuery selector or object to attach scroll listener to (overridden by xScroll & yScroll settings)
stickyHeaders_xScroll : null, // jQuery selector or object to monitor horizontal scroll position (defaults: xScroll > attachTo > window)
stickyHeaders_yScroll : null, // jQuery selector or object to monitor vertical scroll position (defaults: yScroll > attachTo > window)
stickyHeaders_offset : 0, // number or jquery selector targeting the position:fixed element
stickyHeaders_filteredToTop: true, // scroll table top into view after filtering
stickyHeaders_cloneId : '-sticky', // added to table ID, if it exists
stickyHeaders_addResizeEvent : true, // trigger 'resize' event on headers
stickyHeaders_includeCaption : true, // if false and a caption exist, it won't be included in the sticky header
stickyHeaders_zIndex : 2 // The zIndex of the stickyHeaders, allows the user to adjust this to their needs
},
format: function(table, c, wo) {
// filter widget doesn't initialize on an empty table. Fixes #449
if ( c.$table.hasClass('hasStickyHeaders') || ($.inArray('filter', c.widgets) >= 0 && !c.$table.hasClass('hasFilters')) ) {
return;
}
var index, len, $t,
$table = c.$table,
// add position: relative to attach element, hopefully it won't cause trouble.
$attach = $(wo.stickyHeaders_attachTo),
namespace = c.namespace + 'stickyheaders ',
// element to watch for the scroll event
$yScroll = $(wo.stickyHeaders_yScroll || wo.stickyHeaders_attachTo || window),
$xScroll = $(wo.stickyHeaders_xScroll || wo.stickyHeaders_attachTo || window),
$thead = $table.children('thead:first'),
$header = $thead.children('tr').not('.sticky-false').children(),
$tfoot = $table.children('tfoot'),
stickyOffset = getStickyOffset(c, wo),
// is this table nested? If so, find parent sticky header wrapper (div, not table)
$nestedSticky = $table.parent().closest('.' + ts.css.table).hasClass('hasStickyHeaders') ?
$table.parent().closest('table.tablesorter')[0].config.widgetOptions.$sticky.parent() : [],
nestedStickyTop = $nestedSticky.length ? $nestedSticky.height() : 0,
// clone table, then wrap to make sticky header
$stickyTable = wo.$sticky = $table.clone()
.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders + ' ' + c.namespace.slice(1) + '_extra_table' )
.wrap('<div class="' + ts.css.stickyWrap + '">'),
$stickyWrap = $stickyTable.parent()
.addClass(ts.css.stickyHide)
.css({
position : $attach.length ? 'absolute' : 'fixed',
padding : parseInt( $stickyTable.parent().parent().css('padding-left'), 10 ),
top : stickyOffset + nestedStickyTop,
left : 0,
visibility : 'hidden',
zIndex : wo.stickyHeaders_zIndex || 2
}),
$stickyThead = $stickyTable.children('thead:first'),
$stickyCells,
laststate = '',
setWidth = function($orig, $clone){
var index, width, border, $cell, $this,
$cells = $orig.filter(':visible'),
len = $cells.length;
for ( index = 0; index < len; index++ ) {
$cell = $clone.filter(':visible').eq(index);
$this = $cells.eq(index);
// code from https://github.com/jmosbech/StickyTableHeaders
if ($this.css('box-sizing') === 'border-box') {
width = $this.outerWidth();
} else {
if ($cell.css('border-collapse') === 'collapse') {
if (window.getComputedStyle) {
width = parseFloat( window.getComputedStyle($this[0], null).width );
} else {
// ie8 only
border = parseFloat( $this.css('border-width') );
width = $this.outerWidth() - parseFloat( $this.css('padding-left') ) - parseFloat( $this.css('padding-right') ) - border;
}
} else {
width = $this.width();
}
}
$cell.css({
'width': width,
'min-width': width,
'max-width': width
});
}
},
getLeftPosition = function() {
return $attach.length ?
parseInt($attach.css('padding-left'), 10) || 0 :
$table.offset().left - parseInt($table.css('margin-left'), 10) - $(window).scrollLeft();
},
resizeHeader = function() {
$stickyWrap.css({
left : getLeftPosition(),
width: $table.outerWidth()
});
setWidth( $table, $stickyTable );
setWidth( $header, $stickyCells );
},
scrollSticky = function( resizing ) {
if (!$table.is(':visible')) { return; } // fixes #278
// Detect nested tables - fixes #724
nestedStickyTop = $nestedSticky.length ? $nestedSticky.offset().top - $yScroll.scrollTop() + $nestedSticky.height() : 0;
var tmp,
offset = $table.offset(),
stickyOffset = getStickyOffset(c, wo),
yWindow = $.isWindow( $yScroll[0] ), // $.isWindow needs jQuery 1.4.3
attachTop = $attach.length ?
( yWindow ? $yScroll.scrollTop() : $yScroll.offset().top ) :
$yScroll.scrollTop(),
captionHeight = wo.stickyHeaders_includeCaption ? 0 : $table.children( 'caption' ).height() || 0,
scrollTop = attachTop + stickyOffset + nestedStickyTop - captionHeight,
tableHeight = $table.height() - ($stickyWrap.height() + ($tfoot.height() || 0)) - captionHeight,
isVisible = ( scrollTop > offset.top ) && ( scrollTop < offset.top + tableHeight ) ? 'visible' : 'hidden',
state = isVisible === 'visible' ? ts.css.stickyVis : ts.css.stickyHide,
needsUpdating = !$stickyWrap.hasClass( state ),
cssSettings = { visibility : isVisible };
if ($attach.length) {
// attached sticky headers always need updating
needsUpdating = true;
cssSettings.top = yWindow ? scrollTop - $attach.offset().top : $attach.scrollTop();
}
// adjust when scrolling horizontally - fixes issue #143
tmp = getLeftPosition();
if (tmp !== parseInt($stickyWrap.css('left'), 10)) {
needsUpdating = true;
cssSettings.left = tmp;
}
cssSettings.top = ( cssSettings.top || 0 ) + stickyOffset + nestedStickyTop;
if (needsUpdating) {
$stickyWrap
.removeClass( ts.css.stickyVis + ' ' + ts.css.stickyHide )
.addClass( state )
.css(cssSettings);
}
if (isVisible !== laststate || resizing) {
// make sure the column widths match
resizeHeader();
laststate = isVisible;
}
};
// only add a position relative if a position isn't already defined
if ($attach.length && !$attach.css('position')) {
$attach.css('position', 'relative');
}
// fix clone ID, if it exists - fixes #271
if ($stickyTable.attr('id')) { $stickyTable[0].id += wo.stickyHeaders_cloneId; }
// clear out cloned table, except for sticky header
// include caption & filter row (fixes #126 & #249) - don't remove cells to get correct cell indexing
$stickyTable.find('thead:gt(0), tr.sticky-false').hide();
$stickyTable.find('tbody, tfoot').remove();
$stickyTable.find('caption').toggle(wo.stickyHeaders_includeCaption);
// issue #172 - find td/th in sticky header
$stickyCells = $stickyThead.children().children();
$stickyTable.css({ height:0, width:0, margin: 0 });
// remove resizable block
$stickyCells.find('.' + ts.css.resizer).remove();
// update sticky header class names to match real header after sorting
$table
.addClass('hasStickyHeaders')
.bind('pagerComplete' + namespace, function() {
resizeHeader();
});
ts.bindEvents(table, $stickyThead.children().children('.' + ts.css.header));
if (wo.stickyHeaders_appendTo) {
$(wo.stickyHeaders_appendTo).append( $stickyWrap );
} else {
// add stickyheaders AFTER the table. If the table is selected by ID, the original one (first) will be returned.
$table.after( $stickyWrap );
}
// onRenderHeader is defined, we need to do something about it (fixes #641)
if (c.onRenderHeader) {
$t = $stickyThead.children('tr').children();
len = $t.length;
for ( index = 0; index < len; index++ ) {
// send second parameter
c.onRenderHeader.apply( $t.eq( index ), [ index, c, $stickyTable ] );
}
}
// make it sticky!
$xScroll.add($yScroll)
.unbind( ('scroll resize '.split(' ').join( namespace )).replace(/\s+/g, ' ') )
.bind('scroll resize '.split(' ').join( namespace ), function( event ) {
scrollSticky( event.type === 'resize' );
});
c.$table
.unbind('stickyHeadersUpdate' + namespace)
.bind('stickyHeadersUpdate' + namespace, function(){
scrollSticky( true );
});
if (wo.stickyHeaders_addResizeEvent) {
ts.addHeaderResizeEvent(table);
}
// look for filter widget
if ($table.hasClass('hasFilters') && wo.filter_columnFilters) {
// scroll table into view after filtering, if sticky header is active - #482
$table.bind('filterEnd' + namespace, function() {
// $(':focus') needs jQuery 1.6+
var $td = $(document.activeElement).closest('td'),
column = $td.parent().children().index($td);
// only scroll if sticky header is active
if ($stickyWrap.hasClass(ts.css.stickyVis) && wo.stickyHeaders_filteredToTop) {
// scroll to original table (not sticky clone)
window.scrollTo(0, $table.position().top);
// give same input/select focus; check if c.$filters exists; fixes #594
if (column >= 0 && c.$filters) {
c.$filters.eq(column).find('a, select, input').filter(':visible').focus();
}
}
});
ts.filter.bindSearch( $table, $stickyCells.find('.' + ts.css.filter) );
// support hideFilters
if (wo.filter_hideFilters) {
ts.filter.hideFilters(c, $stickyTable);
}
}
// resize table (Firefox)
if (wo.stickyHeaders_addResizeEvent) {
$table.bind('resize' + c.namespace + 'stickyheaders', function() {
resizeHeader();
});
}
// make sure sticky is visible if page is partially scrolled
scrollSticky( true );
$table.triggerHandler('stickyHeadersInit');
},
remove: function(table, c, wo) {
var namespace = c.namespace + 'stickyheaders ';
c.$table
.removeClass('hasStickyHeaders')
.unbind( ('pagerComplete resize filterEnd stickyHeadersUpdate '.split(' ').join(namespace)).replace(/\s+/g, ' ') )
.next('.' + ts.css.stickyWrap).remove();
if (wo.$sticky && wo.$sticky.length) { wo.$sticky.remove(); } // remove cloned table
$(window)
.add(wo.stickyHeaders_xScroll)
.add(wo.stickyHeaders_yScroll)
.add(wo.stickyHeaders_attachTo)
.unbind( ('scroll resize '.split(' ').join(namespace)).replace(/\s+/g, ' ') );
ts.addHeaderResizeEvent(table, true);
}
});
})(jQuery, window);