MediaWiki:Common.js

/* 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 
 * http://www.mediawiki.org/wiki/Manual:Collapsible_tables. 
 *  Maintainers: [[en: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];
			ables[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 [[MediaWiki:Common.css]]
			ButtonLink.style.color = Header.style.color;
			ButtonLink.setAttribute( 'id', 'collapseButton' + tableIndex );
			ButtonLink.setAttribute( 'href', "javascript:collapseTable(" + tableIndex + ");" );
			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 );

/** 
 * 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 );
	};
})();