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StickyHeaders: only update class as needed. See #1018

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This commit is contained in:
Rob Garrison 2017-08-31 14:46:57 -05:00
parent 4e54230321
commit 2854dc4340
1 changed files with 8 additions and 4 deletions
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6
js/widgets/widget-stickyHeaders.js
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@ -174,6 +174,7 @@
scrollTop = attachTop + stickyOffset + nestedStickyTop - captionHeight,
tableHeight = $table.height() - ($stickyWrap.height() + ($tfoot.height() || 0)) - captionHeight,
isVisible = ( scrollTop > offset.top ) && ( scrollTop < offset.top + tableHeight ) ? 'visible' : 'hidden',
state = isVisible === 'visible' ? ts.css.stickyVis : ts.css.stickyHide,
cssSettings = { visibility : isVisible };
if ($attach.length) {
cssSettings.top = yWindow ? scrollTop - $attach.offset().top : $attach.scrollTop();
@ -183,10 +184,13 @@
cssSettings.left = $table.offset().left - parseInt($table.css('margin-left'), 10) - $xScroll.scrollLeft();
}
cssSettings.top = ( cssSettings.top || 0 ) + stickyOffset + nestedStickyTop;
// attached sticky headers always need updating
if ( !$stickyWrap.hasClass( state ) || $attach.length ) {
$stickyWrap
.removeClass( ts.css.stickyVis + ' ' + ts.css.stickyHide )
.addClass( isVisible === 'visible' ? ts.css.stickyVis : ts.css.stickyHide )
.addClass( state )
.css(cssSettings);
}
if (isVisible !== laststate || resizing) {
// make sure the column widths match
resizeHeader();