MediaWiki:Common.js

/**
 * Collapsible tables
 *
 * Allows tables to be collapsed, showing only the header. See [[Help:Collapsing]].
 *
 * @version 2.0.3 (2014-03-14)
 * @source https://www.mediawiki.org/wiki/MediaWiki:Gadget-collapsibleTables.js
 * @author [[User:R. Koot]]
 * @author [[User:Krinkle]]
 * @deprecated Since MediaWiki 1.20: Use class="mw-collapsible" instead which
 * is supported in MediaWiki core.
 */

var autoCollapse = 2;
var collapseCaption = 'hide';
var expandCaption = 'show';
var tableIndex = 0;

function collapseTable( tableIndex ) {
	var Button = document.getElementById( 'collapseButton' + tableIndex );
	var Table = document.getElementById( 'collapsibleTable' + tableIndex );

	if ( !Table || !Button ) {
		return false;
	}

	var Rows = Table.rows;
	var i;
	var $row0 = $(Rows[0]);

	if ( Button.firstChild.data === collapseCaption ) {
		for ( i = 1; i < Rows.length; i++ ) {
			Rows[i].style.display = 'none';
		}
		Button.firstChild.data = expandCaption;
	} else {
		for ( i = 1; i < Rows.length; i++ ) {
			Rows[i].style.display = $row0.css( 'display' );
		}
		Button.firstChild.data = collapseCaption;
	}
}

function createClickHandler( tableIndex ) {
	return function ( e ) {
		e.preventDefault();
		collapseTable( tableIndex );
	};
}

function createCollapseButtons( $content ) {
	var NavigationBoxes = {};
	var $Tables = $content.find( 'table' );
	var i;

	$Tables.each( function( i, table ) {
		if ( $(table).hasClass( 'collapsible' ) ) {

			/* only add button and increment count if there is a header row to work with */
			var HeaderRow = table.getElementsByTagName( 'tr' )[0];
			if ( !HeaderRow ) {
				return;
			}
			var Header = table.getElementsByTagName( 'th' )[0];
			if ( !Header ) {
				return;
			}

			NavigationBoxes[ tableIndex ] = table;
			table.setAttribute( 'id', 'collapsibleTable' + tableIndex );

			var Button     = document.createElement( 'span' );
			var ButtonLink = document.createElement( 'a' );
			var ButtonText = document.createTextNode( collapseCaption );
			// Styles are declared in [[MediaWiki:Common.css]]
			Button.className = 'collapseButton';

			ButtonLink.style.color = Header.style.color;
			ButtonLink.setAttribute( 'id', 'collapseButton' + tableIndex );
			ButtonLink.setAttribute( 'href', '#' );
			$( ButtonLink ).on( 'click', createClickHandler( tableIndex ) );
			ButtonLink.appendChild( ButtonText );

			Button.appendChild( document.createTextNode( '[' ) );
			Button.appendChild( ButtonLink );
			Button.appendChild( document.createTextNode( ']' ) );

			Header.insertBefore( Button, Header.firstChild );
			tableIndex++;
		}
	} );

	for ( i = 0;  i < tableIndex; i++ ) {
		if ( $( NavigationBoxes[i] ).hasClass( 'collapsed' ) ||
			( tableIndex >= autoCollapse && $( NavigationBoxes[i] ).hasClass( 'autocollapse' ) )
		) {
			collapseTable( i );
		}
	}
}

mw.hook( 'wikipage.content' ).add( createCollapseButtons );