Difference between revisions of "MediaWiki:Common.js"

Revision as of 05:22, 31 July 2009

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

/* Event attach functions. */
function DW_eventAttach (obj, event, handler) {
	if (obj.addEventListener) {
		obj.addEventListener(event, handler, false);
	} else if (obj.attachEvent) {
		var r = obj.attachEvent('on' + event, handler);
	} else {
		obj['on' + event] = handler;
	}
}

/* Functions for Template:SpoilerWindow */
function DW_createSpoilerLink () {
	var el_list = document.getElementsByTagName('div');
	var el_cur;
	for (var i = 0, l = el_list.length; i < l; i++){ 
		el_cur = el_list[i];
		
		if ((el_cur.className && el_cur.className == 'dwspoiler')) {
			var container = el_cur.getElementsByTagName('div');
			if (!container.item(1).style.display || container.item(1).style.display == 'block') {
				var text = document.createTextNode('Hide');
			} else {
				var text = document.createTextNode('Show');
			}
			
			var link = document.createElement('a');
			link.appendChild(text);
			link.setAttribute('href', 'javascript:void(0);');
			DW_eventAttach(link, 'click', function () { DW_toggleVisibility(this); });
			
			var toggle_element = el_cur.getElementsByTagName('span');
			toggle_element.item(0).appendChild(document.createTextNode('['));
			toggle_element.item(0).appendChild(link);
			toggle_element.item(0).appendChild(document.createTextNode(']'));
			
		}
	}
}
addOnloadHook(DW_createSpoilerLink);

function DW_toggleVisibility (obj) {
	var container = obj.parentNode.parentNode.parentNode.getElementsByTagName('div').item(1);
	if (!container.style.display || container.style.display == 'block') {
		container.style.display = 'none';
		obj.innerHTML = 'Show';
	} else {
		container.style.display = 'block';
		obj.innerHTML = 'Hide';
	}
}

/** Collapsible tables *********************************************************
 *
 *  Description: Allows tables to be collapsed, showing only the header. See
 *               [[**DOCUMENTATION LINK**]].
 *  Maintainers: [[**MAINTAINERS**]]
 */
 
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 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 );
        } 
    }
}
 
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);
	};
})();