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Responsive improvement and fix header cells width #7

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42be9b5
Change stickyheader.jquery.js to be responsive
bascoder Oct 8, 2015
63bdd6d
Fix header width for tables with borders
bascoder Oct 8, 2015
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116 changes: 68 additions & 48 deletions stickyheader.jquery.js
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Original file line number Diff line number Diff line change
@@ -1,48 +1,68 @@
jQuery(document).ready(function ($) {
var tables = $('table.stickyHeader');
tables.each(function(i){
var table = tables[i];
var tableClone = $(table).clone(true).empty().removeClass('stickyHeader');
var theadClone = $(table).find('thead').clone(true);
var stickyHeader = $('<div></div>').addClass('stickyHeader hide').attr('aria-hidden', 'true');
stickyHeader.append(tableClone).find('table').append(theadClone);
$(table).after(stickyHeader);

var tableHeight = $(table).height();
var tableWidth = $(table).width() + Number($(table).css('padding-left').replace(/px/ig,"")) + Number($(table).css('padding-right').replace(/px/ig,"")) + Number($(table).css('border-left-width').replace(/px/ig,"")) + Number($(table).css('border-right-width').replace(/px/ig,""));

var headerCells = $(table).find('thead th');
var headerCellHeight = $(headerCells[0]).height();

var no_fixed_support = false;
if (stickyHeader.css('position') == "absolute") {
no_fixed_support = true;
}

var stickyHeaderCells = stickyHeader.find('th');
stickyHeader.css('width', tableWidth);
var cellWidths = [];
for (var i = 0, l = headerCells.length; i < l; i++) {
cellWidths[i] = $(headerCells[i]).width();
}
for (var i = 0, l = headerCells.length; i < l; i++) {
$(stickyHeaderCells[i]).css('width', cellWidths[i]);
}

var cutoffTop = $(table).offset().top;
var cutoffBottom = tableHeight + cutoffTop - headerCellHeight;

$(window).scroll(function() {
var currentPosition = $(window).scrollTop();
if (currentPosition > cutoffTop && currentPosition < cutoffBottom) {
stickyHeader.removeClass('hide');
if (no_fixed_support) {
stickyHeader.css('top', currentPosition + 'px');
}
}
else {
stickyHeader.addClass('hide');
}
});
});
});
var initStickyHeaders = function () {
var tables = jQuery('table.stickyHeader');
tables.each(function(i){
var table = tables[i];
var tableClone = jQuery(table).clone(true).empty().removeClass('stickyHeader');
var theadClone = jQuery(table).find('thead').clone(true);
var stickyHeader = jQuery('<div></div>').addClass('stickyHeader hide').attr('aria-hidden', 'true');
stickyHeader.append(tableClone).find('table').append(theadClone);
jQuery(table).after(stickyHeader);

var tableHeight = jQuery(table).height();
var tableWidth = jQuery(table).width()
+ Number(jQuery(table).css('padding-left').replace(/px/ig, ""))
+ Number(jQuery(table).css('padding-right').replace(/px/ig, ""))
+ Number(jQuery(table).css('border-left-width').replace(/px/ig, ""))
+ Number(jQuery(table).css('border-right-width').replace(/px/ig, ""));

var headerCells = jQuery(table).find('thead th');
var headerCellHeight = jQuery(headerCells[0]).height();

var no_fixed_support = false;
if (stickyHeader.css('position') == "absolute") {
no_fixed_support = true;
}

var stickyHeaderCells = stickyHeader.find('th');
stickyHeader.css('width', tableWidth);
var cellWidths = [];
for (var i = 0, l = headerCells.length; i < l; i++) {
cellWidths[i] = jQuery(headerCells[i]).outerWidth(); //outerWidth also calculates border
}
for (var i = 0, l = headerCells.length; i < l; i++) {
jQuery(stickyHeaderCells[i]).css('width', cellWidths[i]);
}

var cutoffTop = jQuery(table).offset().top;
var cutoffBottom = tableHeight + cutoffTop - headerCellHeight;

jQuery(window).scroll(function() {
var currentPosition = jQuery(window).scrollTop();
if (currentPosition > cutoffTop && currentPosition < cutoffBottom) {
stickyHeader.removeClass('hide');
if (no_fixed_support) {
stickyHeader.css('top', currentPosition + 'px');
}
}
else {
stickyHeader.addClass('hide');
}
});

// init sticky headers again on resize
jQuery(window).on('resize', reInitStickyHeaders);
});
};

function reInitStickyHeaders() {
// remove old sticky header
jQuery('div.stickyHeader').remove();
// unbind scroll and resize handlers
jQuery(window).off('scroll');
jQuery(window).off('resize');
// run initStickyHeaders again
initStickyHeaders();
}

// init sticky headers on dom load
jQuery(document).ready(initStickyHeaders);