MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
/** Collapsible tables *********************************************************
*
*  Description: Allows tables to be collapsed, showing only the header. See
*               [[Wikipedia:NavFrame]].
*  Maintainers: [[User:R. Koot]]
*/
 
var autoCollapse = 2;
var collapseCaption = "hide";
var expandCaption = "show";
 
function collapseTable( tableIndex )
{
var Button = document.getElementById( "collapseButton" + tableIndex );
var Table = document.getElementById( "collapsibleTable" + tableIndex );
 
if ( !Table || !Button ) {
return false;
}
 
var Rows = Table.rows;
 
if ( Button.firstChild.data == collapseCaption ) {
for ( var i = 1; i < Rows.length; i++ ) {
Rows[i].style.display = "none";
}
Button.firstChild.data = expandCaption;
} else {
for ( var i = 1; i < Rows.length; i++ ) {
Rows[i].style.display = Rows[0].style.display;
}
Button.firstChild.data = collapseCaption;
}
}
 
function createCollapseButtons()
{
var tableIndex = 0;
var NavigationBoxes = new Object();
var Tables = document.getElementsByTagName( "table" );
 
for ( var i = 0; i < Tables.length; i++ ) {
if ( hasClass( Tables[i], "collapsible" ) ) {
 
/* only add button and increment count if there is a header row to work with */
var HeaderRow = Tables[i].getElementsByTagName( "tr" )[0];
if (!HeaderRow) continue;
var Header = HeaderRow.getElementsByTagName( "th" )[0];
if (!Header) continue;
 
NavigationBoxes[ tableIndex ] = Tables[i];
Tables[i].setAttribute( "id", "collapsibleTable" + tableIndex );
 
var Button     = document.createElement( "span" );
var ButtonLink = document.createElement( "a" );
var ButtonText = document.createTextNode( collapseCaption );
 
Button.className = "collapseButton";  //Styles are declared in Common.css
 
ButtonLink.style.color = Header.style.color;
ButtonLink.setAttribute( "id", "collapseButton" + tableIndex );
ButtonLink.setAttribute( "href", "#" );
addHandler( ButtonLink,  "click", new Function( "evt", "collapseTable(" + tableIndex + " ); return killEvt( evt );") );
ButtonLink.appendChild( ButtonText );
 
Button.appendChild( document.createTextNode( "[" ) );
Button.appendChild( ButtonLink );
Button.appendChild( document.createTextNode( "]" ) );
 
Header.insertBefore( Button, Header.childNodes[0] );
tableIndex++;
}
}
 
for ( var i = 0;  i < tableIndex; i++ ) {
if ( hasClass( NavigationBoxes[i], "collapsed" ) || ( tableIndex >= autoCollapse && hasClass( NavigationBoxes[i], "autocollapse" ) ) ) {
collapseTable( i );
}
else if ( hasClass( NavigationBoxes[i], "innercollapse" ) ) {
var element = NavigationBoxes[i];
while (element = element.parentNode) {
if ( hasClass( element, "outercollapse" ) ) {
collapseTable ( i );
break;
}
}
}
}
}
 
addOnloadHook( createCollapseButtons );
 
 
/** Dynamic Navigation Bars (experimental) *************************************
*
*  Description: See [[Wikipedia:NavFrame]].
*  Maintainers: UNMAINTAINED
*/
 
// set up the words in your language
var NavigationBarHide = '[' + collapseCaption + ']';
var NavigationBarShow = '[' + expandCaption + ']';
 
// shows and hides content and picture (if available) of navigation bars
// Parameters:
//     indexNavigationBar: the index of navigation bar to be toggled
function toggleNavigationBar(indexNavigationBar)
{
var NavToggle = document.getElementById("NavToggle" + indexNavigationBar);
var NavFrame = document.getElementById("NavFrame" + indexNavigationBar);
 
if (!NavFrame || !NavToggle) {
return false;
}
 
// if shown now
if (NavToggle.firstChild.data == NavigationBarHide) {
for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
if (hasClass(NavChild, 'NavContent') || hasClass(NavChild, 'NavPic')) {
NavChild.style.display = 'none';
}
}
NavToggle.firstChild.data = NavigationBarShow;
 
// if hidden now
} else if (NavToggle.firstChild.data == NavigationBarShow) {
for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
if (hasClass(NavChild, 'NavContent') || hasClass(NavChild, 'NavPic')) {
NavChild.style.display = 'block';
}
}
NavToggle.firstChild.data = NavigationBarHide;
}
}
 
// adds show/hide-button to navigation bars
function createNavigationBarToggleButton()
{
var indexNavigationBar = 0;
// iterate over all < div >-elements 
var divs = document.getElementsByTagName("div");
for (var i = 0; NavFrame = divs[i]; i++) {
// if found a navigation bar
if (hasClass(NavFrame, "NavFrame")) {
 
indexNavigationBar++;
var NavToggle = document.createElement("a");
NavToggle.className = 'NavToggle';
NavToggle.setAttribute('id', 'NavToggle' + indexNavigationBar);
NavToggle.setAttribute('href', 'javascript:toggleNavigationBar(' + indexNavigationBar + ');');
 
var isCollapsed = hasClass( NavFrame, "collapsed" );
/*
* Check if any children are already hidden.  This loop is here for backwards compatibility:
* the old way of making NavFrames start out collapsed was to manually add style="display:none"
* to all the NavPic/NavContent elements.  Since this was bad for accessibility (no way to make
* the content visible without JavaScript support), the new recommended way is to add the class
* "collapsed" to the NavFrame itself, just like with collapsible tables.
*/
for (var NavChild = NavFrame.firstChild; NavChild != null && !isCollapsed; NavChild = NavChild.nextSibling) {
if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
if ( NavChild.style.display == 'none' ) {
isCollapsed = true;
}
}
}
if (isCollapsed) {
for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
NavChild.style.display = 'none';
}
}
}
var NavToggleText = document.createTextNode(isCollapsed ? NavigationBarShow : NavigationBarHide);
NavToggle.appendChild(NavToggleText);
 
// Find the NavHead and attach the toggle link (Must be this complicated because Moz's firstChild handling is borked)
for(var j=0; j < NavFrame.childNodes.length; j++) {
if (hasClass(NavFrame.childNodes[j], "NavHead")) {
NavFrame.childNodes[j].appendChild(NavToggle);
}
}
NavFrame.setAttribute('id', 'NavFrame' + indexNavigationBar);
}
}
}
 
addOnloadHook( createNavigationBarToggleButton );

/** Test if an element has a certain class **************************************
*
* Description: Uses regular expressions and caching for better performance.
* Maintainers: [[User:Mike Dillon]], [[User:R. Koot]], [[User:SG]]
*/

var hasClass = (function() {
	var reCache = {};
	return function( element, className ) {
		return (reCache[className] ? reCache[className] : (reCache[className] = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"))).test(element.className);
	};
})();