sort.js
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/*******************************************************************************
* Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
(function () {
/**
* Sets the initial sorting derived from the hash.
*
* @param linkelementids
* list of element ids to search for links to add sort inidcator
* hash links
*/
function initialSort(linkelementids) {
window.linkelementids = linkelementids;
var hash = window.location.hash;
if (hash) {
var m = hash.match(/up-./);
if (m) {
var header = window.document.getElementById(m[0].charAt(3));
if (header) {
sortColumn(header, true);
}
return;
}
var m = hash.match(/dn-./);
if (m) {
var header = window.document.getElementById(m[0].charAt(3));
if (header) {
sortColumn(header, false);
}
return
}
}
}
/**
* Sorts the columns with the given header dependening on the current sort state.
*/
function toggleSort(header) {
var sortup = header.className.indexOf('down ') == 0;
sortColumn(header, sortup);
}
/**
* Sorts the columns with the given header in the given direction.
*/
function sortColumn(header, sortup) {
var table = header.parentNode.parentNode.parentNode;
var body = table.tBodies[0];
var colidx = getNodePosition(header);
resetSortedStyle(table);
var rows = body.rows;
var sortedrows = [];
for (var i = 0; i < rows.length; i++) {
r = rows[i];
sortedrows[parseInt(r.childNodes[colidx].id.slice(1))] = r;
}
var hash;
if (sortup) {
for (var i = sortedrows.length - 1; i >= 0; i--) {
body.appendChild(sortedrows[i]);
}
header.className = 'up ' + header.className;
hash = 'up-' + header.id;
} else {
for (var i = 0; i < sortedrows.length; i++) {
body.appendChild(sortedrows[i]);
}
header.className = 'down ' + header.className;
hash = 'dn-' + header.id;
}
setHash(hash);
}
/**
* Adds the sort indicator as a hash to the document URL and all links.
*/
function setHash(hash) {
window.document.location.hash = hash;
ids = window.linkelementids;
for (var i = 0; i < ids.length; i++) {
setHashOnAllLinks(document.getElementById(ids[i]), hash);
}
}
/**
* Extend all links within the given tag with the given hash.
*/
function setHashOnAllLinks(tag, hash) {
links = tag.getElementsByTagName("a");
for (var i = 0; i < links.length; i++) {
var a = links[i];
var href = a.href;
var hashpos = href.indexOf("#");
if (hashpos != -1) {
href = href.substring(0, hashpos);
}
a.href = href + "#" + hash;
}
}
/**
* Calculates the position of a element within its parent.
*/
function getNodePosition(element) {
var pos = -1;
while (element) {
element = element.previousSibling;
pos++;
}
return pos;
}
/**
* Remove the sorting indicator style from all headers.
*/
function resetSortedStyle(table) {
for (var c = table.tHead.firstChild.firstChild; c; c = c.nextSibling) {
if (c.className) {
if (c.className.indexOf('down ') == 0) {
c.className = c.className.slice(5);
}
if (c.className.indexOf('up ') == 0) {
c.className = c.className.slice(3);
}
}
}
}
window['initialSort'] = initialSort;
window['toggleSort'] = toggleSort;
})();