Commit 926a26b6 authored by Dries's avatar Dries

- Patch #787670 by casey, Kiphaas7: clean up tableheader.js.

parent c7b77049
......@@ -331,7 +331,21 @@ $('html').addClass('js');
// 'js enabled' cookie.
document.cookie = 'has_js=1; path=/';
// Attach all behaviors.
/**
* Additions to jQuery.support.
*/
$(function () {
/**
* Boolean indicating whether or not position:fixed is supported.
*/
if (jQuery.support.positionFixed === undefined) {
var el = $('<div style="position:fixed; top:10px" />').appendTo(document.body);
jQuery.support.positionFixed = el[0].offsetTop === 10;
el.remove();
}
});
//Attach all behaviors.
$(function () {
Drupal.attachBehaviors(document, Drupal.settings);
});
......
// $Id$
(function ($) {
Drupal.tableHeaderDoScroll = function () {
if ($.isFunction(Drupal.tableHeaderOnScroll)) {
Drupal.tableHeaderOnScroll();
}
};
/**
* Attaches sticky table headers.
*/
Drupal.behaviors.tableHeader = {
attach: function (context, settings) {
// This breaks in anything less than IE 7. Prevent it from running.
if ($.browser.msie && parseInt($.browser.version, 10) < 7) {
if (!$.support.positionFixed) {
return;
}
$('table.sticky-enabled thead', context).once('tableheader', function () {
// Clone the table header so it inherits original jQuery properties. Hide
// the table to avoid a flash of the header clone upon page load.
var headerClone = $(this).clone(true).hide().insertBefore(this.parentNode).wrap('<table class="sticky-header"></table>').parent().css({
position: 'fixed',
top: '0px'
});
headerClone = $(headerClone)[0];
$('table.sticky-enabled', context).once('tableheader', function () {
$(this).data("drupal-tableheader", new Drupal.tableHeader(this));
});
}
};
// Store parent table.
var table = $(this).parent('table')[0];
headerClone.table = table;
// Finish initializing header positioning.
tracker(headerClone);
// We hid the header to avoid it showing up erroneously on page load;
// we need to unhide it now so that it will show up when expected.
$(headerClone).children('thead').show();
/**
* Constructor for the tableHeader object. Provides sticky table headers.
*
* @param table
* DOM object for the table to add a sticky header to.
*/
Drupal.tableHeader = function (table) {
var self = this;
$(table).addClass('sticky-table');
});
this.originalTable = $(table);
this.originalHeader = $(table).children('thead');
this.originalHeaderCells = this.originalHeader.find('> tr > th');
// Define the anchor holding var.
var prevAnchor = '';
// Clone the table header so it inherits original jQuery properties. Hide
// the table to avoid a flash of the header clone upon page load.
this.stickyTable = $('<table class="sticky-header"/>')
.insertBefore(this.originalTable)
.css({ position: 'fixed', top: '0px' });
this.stickyHeader = this.originalHeader.clone(true)
.hide()
.appendTo(this.stickyTable);
this.stickyHeaderCells = this.stickyHeader.find('> tr > th');
// Track positioning and visibility.
function tracker(e) {
// Reset top position of sticky table headers to the current top offset.
var topOffset = Drupal.settings.tableHeaderOffset ? eval(Drupal.settings.tableHeaderOffset + '()') : 0;
$('.sticky-header').css('top', topOffset + 'px');
// 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 - topOffset;
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'));
this.originalTable.addClass('sticky-table');
$(window)
.bind('scroll.drupal-tableheader', $.proxy(this, 'eventhandlerRecalculateStickyHeader'))
.bind('resize.drupal-tableheader', { calculateWidth: true }, $.proxy(this, 'eventhandlerRecalculateStickyHeader'))
// Make sure the anchor being scrolled into view is not hidden beneath the
// sticky table header. Adjust the scrollTop if it does.
.bind('drupalDisplaceAnchor.drupal-tableheader', function () {
window.scrollBy(0, -self.stickyTable.outerHeight());
})
// Make sure the element being focused is not hidden beneath the sticky
// table header. Adjust the scrollTop if it does.
.bind('drupalDisplaceFocus.drupal-tableheader', function (event) {
if (self.stickyVisible && event.clientY < (self.stickyOffsetTop + self.stickyTable.outerHeight()) && event.$target.closest('sticky-header').length === 0) {
window.scrollBy(0, -self.stickyTable.outerHeight());
}
})
.triggerHandler('resize.drupal-tableheader');
// 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 });
// We hid the header to avoid it showing up erroneously on page load;
// we need to unhide it now so that it will show up when expected.
this.stickyHeader.show();
};
// Check the previous anchor to see if we need to scroll to make room for the header.
// Get the height of the header table and scroll up that amount.
if (prevAnchor != location.hash) {
if (location.hash != '') {
var scrollLocation = $('td' + location.hash).offset().top - $(e).height();
$('body, html').scrollTop(scrollLocation);
}
prevAnchor = location.hash;
}
}
/**
* Event handler: recalculates position of the sticky table header.
*
* @param event
* Event being triggered.
*/
Drupal.tableHeader.prototype.eventhandlerRecalculateStickyHeader = function (event) {
var self = this;
var calculateWidth = event.data && event.data.calculateWidth;
// Only attach to scrollbars once, even if Drupal.attachBehaviors is called
// multiple times.
$('body').once(function () {
$(window).scroll(Drupal.tableHeaderDoScroll);
$(document.documentElement).scroll(Drupal.tableHeaderDoScroll);
});
// Reset top position of sticky table headers to the current top offset.
this.stickyOffsetTop = Drupal.settings.tableHeaderOffset ? eval(Drupal.settings.tableHeaderOffset + '()') : 0;
this.stickyTable.css('top', this.stickyOffsetTop + 'px');
// Track scrolling.
Drupal.tableHeaderOnScroll = function () {
$('table.sticky-header').each(function () {
tracker(this);
});
};
// Save positioning data.
var viewHeight = document.documentElement.scrollHeight || document.body.scrollHeight;
if (calculateWidth || this.viewHeight !== viewHeight) {
this.viewHeight = viewHeight;
this.vPosition = this.originalTable.offset().top - 4 - this.stickyOffsetTop;
this.hPosition = this.originalTable.offset().left;
this.vLength = this.originalTable[0].clientHeight - 100;
calculateWidth = true;
}
// 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) - this.vPosition;
this.stickyVisible = vOffset > 0 && vOffset < this.vLength;
this.stickyTable.css({ left: (-hScroll + this.hPosition) + 'px', visibility: this.stickyVisible ? 'visible' : 'hidden' });
// Track resizing.
var time = null;
var resize = function () {
// Ensure minimum time between adjustments.
if (time) {
return;
// Only perform expensive calculations if the sticky header is actually
// visible or when forced.
if (this.stickyVisible && (calculateWidth || !this.widthCalculated)) {
this.widthCalculated = true;
// Resize header and its cell widths.
this.stickyHeaderCells.each(function (index) {
var cellWidth = self.originalHeaderCells.eq(index).css('width');
// Exception for IE7.
if (cellWidth == 'auto') {
cellWidth = self.originalHeaderCells.get(index).clientWidth + 'px';
}
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);
$(this).css('width', cellWidth);
});
this.stickyTable.css('width', this.originalTable.css('width'));
}
};
......
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