MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */

/** START 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];
            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 [[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;
                }
            }
        }
    }

}

$( 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 );
    };

})();/**END COLLAPSIBLE TABLES********************************************/