MediaWiki:Common.js

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

/* 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);
    };
})();

/** Collapsible tables *********************************************************
 *
 *  Description: Allows tables to be collapsed, showing only the header. See
 *               [[Wikipedia:NavFrame]].
 *  Maintainers: [[User:R. Koot]]
 *
 *  Modified by Proformatique
 */

var autoCollapse = 3;
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 i;
    var Rows = Table.rows;

    var TitleRowSpans = Rows[0].getElementsByTagName( "span" );
 
    if ( Button.firstChild.data == collapseCaption ) {
        if (TitleRowSpans) {
            for ( i = 0; i < TitleRowSpans.length; i++ ) {
                if (hasClass(TitleRowSpans[i], "hideExpanded")) {
                  TitleRowSpans[i].style.display = Rows[0].style.display;
                }
                if (hasClass(TitleRowSpans[i], "hideCollapsed")) {
                  TitleRowSpans[i].style.display = "none";
                }
            }
        }
        for ( i = 1; i < Rows.length; i++ ) {
            Rows[i].style.display = "none";
        }
        Button.firstChild.data = expandCaption;
    } else {
        if (TitleRowSpans) {
            for ( i = 0; i < TitleRowSpans.length; i++ ) {
                if (hasClass(TitleRowSpans[i], "hideExpanded")) {
                  TitleRowSpans[i].style.display = "none";
                }
                if (hasClass(TitleRowSpans[i], "hideCollapsed")) {
                  TitleRowSpans[i].style.display = Rows[0].style.display;
                }
            }
        }
        for ( 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;

            var TitleRowSpans = Tables[i].rows[0].getElementsByTagName( "span" );
            for ( j = 0; j < TitleRowSpans.length; j++ ) {
                if (hasClass(TitleRowSpans[j], "hideExpanded")) {
                  TitleRowSpans[j].style.display = "none";
                }
            }

            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", "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" ) || ( i >= 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 );