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// Javascript code by Máirín Duffy <duffy@redhat.com>
IMAGE_COLLAPSED_PATH = '/img/list-expand.gif';
IMAGE_EXPANDED_PATH = '/img/list-collapse.gif';
IMAGE_CHILDLESS_PATH = '/img/rhn-bullet-parentchannel.gif';
var rowHash = new Array();
var browserType;
var columnsPerRow;
// tip of the Red Hat to Mar Orlygsson for this little IE detection script
var is_ie/*@cc_on = {
quirksmode : (document.compatMode=="BackCompat"),
version : parseFloat(navigator.appVersion.match(/MSIE (.+?);/)[1])
}@*/;
browserType = is_ie;
function onLoadStuff(columns) {
columnsPerRow = columns;
var channelTable = document.getElementById('channel-list');
createParentRows(channelTable, rowHash);
reuniteChildrenWithParents(channelTable, rowHash);
iconifyChildlessParents(rowHash);
}
function iconifyChildlessParents(rowHash) {
for (var i in rowHash) {
if (!rowHash[i].hasChildren && rowHash[i].image) { rowHash[i].image.src = IMAGE_CHILDLESS_PATH; }
}
}
// called from clicking the show/hide button on individual rows in the page
function toggleRowVisibility(id) {
if (!rowHash[id]) { return; }
if (!rowHash[id].hasChildren) { return; }
rowHash[id].toggleVisibility();
return;
}
function showAllRows() {
var row;
for (var i in rowHash) {
row = rowHash[i];
if (!row) { continue; }
if (!row.hasChildren) { continue; }
row.show();
}
return;
}
function hideAllRows() {
var row;
for (var i in rowHash) {
row = rowHash[i];
if (!row) { continue; }
if (!row.hasChildren) { continue; }
row.hide();
}
return;
}
function Row(cells, image) {
this.cells = new Array();
for (var i = 0; i < cells.length; i++) { this.cells[i] = cells[i]; }
this.image = image;
this.hasChildren = 0;
this.isHidden = 1; // 1 = hidden; 0 = visible. all rows are hidden by default
// Row object methods below!
this.toggleVisibility = function() {
if (this.isHidden == 1) { this.show(); }
else if (this.isHidden == 0) { this.hide(); }
return;
}
this.hide = function hide() {
this.image.src = IMAGE_COLLAPSED_PATH;
// we start with columnsPerRow, because we want to skip the td cells of the parent tr.
for (var i = columnsPerRow; i < this.cells.length; i++) {
this.cells[i].parentNode.style.display = 'none';
this.cells[i].style.display = 'none';
}
this.isHidden = 1;
return;
}
this.show = function() {
displayType = '';
this.image.src = IMAGE_EXPANDED_PATH;
for (var i = 0; i < this.cells.length; i++) {
this.cells[i].style.display = displayType;
this.cells[i].parentNode.style.display = displayType;
}
this.isHidden = 0;
return;
}
}
function createParentRows(channelTable, rowHash) {
for (var i = 0; i < channelTable.rows.length; i++) {
tableRowNode = channelTable.rows[i];
if (isParentRowNode(tableRowNode)) {
if (!tableRowNode.id) { continue; }
id = tableRowNode.id;
var cells = tableRowNode.cells;
var image = findRowImageFromCells(cells, id)
if (!image) { continue; }
rowHash[id] = new Row(cells, image);
}
}
return;
}
function reuniteChildrenWithParents(channelTable, rowHash) {
var parentNode;
var childId;
var tableChildRowNode;
for (var i = 0; i < channelTable.rows.length; i++) {
tableChildRowNode = channelTable.rows[i];
// when we find a parent, set it as parent for the children after it
if (isParentRowNode(tableChildRowNode) && tableChildRowNode.id) {
parentNode = tableChildRowNode;
continue;
}
if (!parentNode) { continue; }
// it its not a child node we bail here
if (!isChildRowNode(tableChildRowNode)) { continue; }
// FIXME: chceck child id against parent id
if (!rowHash[parentNode.id]) { /*alert('bailing, cant find parent in hash');*/ continue; }
for (var j = 0; j < tableChildRowNode.cells.length; j++) {
rowHash[parentNode.id].cells.push(tableChildRowNode.cells[j]);
rowHash[parentNode.id].hasChildren = 1;
}
}
return;
}
function getNodeTagName(node) {
var tagName;
var nodeId;
tagName = new String(node.tagName);
return tagName.toLowerCase();
}
function isParentRowNode(node) {
var nodeInLowercase = getNodeTagName(node);
if (nodeInLowercase != 'tr') { return 0; }
nodeId = node.id;
if ((nodeId.indexOf('id')) && !(nodeId.indexOf('child'))) { return 0; }
return 1;
}
function isChildRowNode(node) {
var nodeInLowercase = getNodeTagName(node);
var nodeId;
if (nodeInLowercase != 'tr') { return 0; }
nodeId = node.id;
if (nodeId.indexOf('child')) { return 0; }
return 1;
}
function findRowImageFromCells(cells, id) {
var imageId = id + '-image';
var childNodes; // first level child
var grandchildNodes; // second level child
for (var i = 0; i < cells.length; i++) {
childNodes = null;
grandchildNodes = null;
if (!cells[i].hasChildNodes()) { continue; }
childNodes = cells[i].childNodes;
for (var j = 0; j < childNodes.length; j++) {
if (!childNodes[j].hasChildNodes()) { continue; }
if (getNodeTagName(childNodes[j]) != 'a') { continue; }
grandchildNodes = childNodes[j].childNodes;
for (var k = 0; k < grandchildNodes.length; k++) {
if (grandchildNodes[k].name != imageId) { continue; }
if (grandchildNodes[k].nodeName == 'IMG' || grandchildNodes[k].nodeName == 'img') { return grandchildNodes[k]; }
}
}
}
return null;
}
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