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- // $Id: tableheader.js,v 1.16 2008/01/30 10:17:39 goba Exp $
-
- Drupal.tableHeaderDoScroll = function() {
- if (typeof(Drupal.tableHeaderOnScroll)=='function') {
- Drupal.tableHeaderOnScroll();
- }
- };
-
- Drupal.behaviors.tableHeader = function (context) {
- // This breaks in anything less than IE 7. Prevent it from running.
- if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 7) {
- return;
- }
-
- // Keep track of all cloned table headers.
- var headers = [];
-
- $('table.sticky-enabled thead:not(.tableHeader-processed)', context).each(function () {
- // Clone thead so it inherits original jQuery properties.
- var headerClone = $(this).clone(true).insertBefore(this.parentNode).wrap('<table class="sticky-header"></table>').parent().css({
- position: 'fixed',
- top: '0px'
- });
-
- headerClone = $(headerClone)[0];
- headers.push(headerClone);
-
- // Store parent table.
- var table = $(this).parent('table')[0];
- headerClone.table = table;
- // Finish initialzing header positioning.
- tracker(headerClone);
-
- $(table).addClass('sticky-table');
- $(this).addClass('tableHeader-processed');
- });
-
- // Track positioning and visibility.
- function tracker(e) {
- // Save positioning data.
- var viewHeight = document.documentElement.scrollHeight || document.body.scrollHeight;
- if (e.viewHeight != viewHeight) {
- e.viewHeight = viewHeight;
- e.vPosition = $(e.table).offset().top - 4;
- e.hPosition = $(e.table).offset().left;
- e.vLength = e.table.clientHeight - 100;
- // Resize header and its cell widths.
- var parentCell = $('th', e.table);
- $('th', e).each(function(index) {
- var cellWidth = parentCell.eq(index).css('width');
- // Exception for IE7.
- if (cellWidth == 'auto') {
- cellWidth = parentCell.get(index).clientWidth +'px';
- }
- $(this).css('width', cellWidth);
- });
- $(e).css('width', $(e.table).css('width'));
- }
-
- // Track horizontal positioning relative to the viewport and set visibility.
- var hScroll = document.documentElement.scrollLeft || document.body.scrollLeft;
- var vOffset = (document.documentElement.scrollTop || document.body.scrollTop) - e.vPosition;
- var visState = (vOffset > 0 && vOffset < e.vLength) ? 'visible' : 'hidden';
- $(e).css({left: -hScroll + e.hPosition +'px', visibility: visState});
- }
-
- // Only attach to scrollbars once, even if Drupal.attachBehaviors is called
- // multiple times.
- if (!$('body').hasClass('tableHeader-processed')) {
- $('body').addClass('tableHeader-processed');
- $(window).scroll(Drupal.tableHeaderDoScroll);
- $(document.documentElement).scroll(Drupal.tableHeaderDoScroll);
- }
-
- // Track scrolling.
- Drupal.tableHeaderOnScroll = function() {
- $(headers).each(function () {
- tracker(this);
- });
- };
-
- // Track resizing.
- var time = null;
- var resize = function () {
- // Ensure minimum time between adjustments.
- if (time) {
- return;
- }
- time = setTimeout(function () {
- $('table.sticky-header').each(function () {
- // Force cell width calculation.
- this.viewHeight = 0;
- tracker(this);
- });
- // Reset timer
- time = null;
- }, 250);
- };
- $(window).resize(resize);
- };
-