Difference between revisions of "MediaWiki:Common.js"

Revision as of 02:51, 4 February 2011

/* 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]]
 */
 
function collapseTable( tableIndex ) {

	var elem = document.getElementById( 'collapsibleTable' + tableIndex );

	if ( elem )
	{
		if(elem.className=="" || elem.className=="hide")
		{
			elem.className = 'show';
			showCells( 'collapsibleTable' + tableIndex );
		}
		else
		{
			elem.className = 'hide';
			hideCells( 'collapsibleTable' + tableIndex );
		}
	}
}
 
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 );
			var ButtonText = document.createTextNode( Header.innerHTML );
 
			Button.className = 'collapseButton'; // Styles are declared in [[MediaWiki:Common.css]]
 
			ButtonLink.style.color = Header.style.color;
			ButtonLink.setAttribute( 'id', 'collapseButton' + tableIndex );
			ButtonLink.setAttribute( 'class', 'hide' );
			ButtonLink.setAttribute( 'href', "javascript:collapseTable(" + tableIndex + ");" );
			//ButtonLink.appendChild( ButtonText );
 
			Header.innerHTML = '<a href="' + ButtonLink + '">' + Header.innerHTML + '</a>';

			// collapse all tables 
			collapseTable(tableIndex);

			tableIndex++;
		}
	}
 
}
 
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 );
	};
})();


function hideCells(root) {
  root = document.getElementById(root);
  var all  = root.getElementsByTagName("td");
  to = all.length;
  for ( var i = 0; i < to; i++ ) {
      all[i].style.display = "none";    
  }
}

function showCells(root) {
  root = document.getElementById(root);
  var all  = root.getElementsByTagName("td");
  to = all.length;
  for ( var i = 0; i < to; i++ ) {
      all[i].style.display = "block";
  }
}