MediaWiki:Common.js

/* 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]]
 */

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 );
        } 
        else if ( hasClass( NavigationBoxes[i], "innercollapse" ) ) {
            var element = NavigationBoxes[i];
            while (element = element.parentNode) {
                if ( hasClass( element, "outercollapse" ) ) {
                    collapseTable ( i );
                    break;
                }
            }
        }
    }
}

addOnloadHook( createCollapseButtons );

/** Dynamic Navigation Bars (experimental) *************************************
 *
 *  Description: See [[Wikipedia:NavFrame]].
 *  Maintainers: UNMAINTAINED
 */

// set up the words in your language
var NavigationBarHide = '[' + collapseCaption + ']';
var NavigationBarShow = '[' + expandCaption + ']';

// shows and hides content and picture (if available) of navigation bars
// Parameters:
//     indexNavigationBar: the index of navigation bar to be toggled
function toggleNavigationBar(indexNavigationBar)
{
    var NavToggle = document.getElementById("NavToggle" + indexNavigationBar);
    var NavFrame = document.getElementById("NavFrame" + indexNavigationBar);

    if (!NavFrame || !NavToggle) {
        return false;
    }

    // if shown now
    if (NavToggle.firstChild.data == NavigationBarHide) {
        for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
            if ( hasClass( NavChild, 'NavPic' ) ) {
                NavChild.style.display = 'none';
            }
            if ( hasClass( NavChild, 'NavContent') ) {
                NavChild.style.display = 'none';
            }
        }
    NavToggle.firstChild.data = NavigationBarShow;

    // if hidden now
    } else if (NavToggle.firstChild.data == NavigationBarShow) {
        for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
            if (hasClass(NavChild, 'NavPic')) {
                NavChild.style.display = 'block';
            }
            if (hasClass(NavChild, 'NavContent')) {
                NavChild.style.display = 'block';
            }
        }
        NavToggle.firstChild.data = NavigationBarHide;
    }
}

// adds show/hide-button to navigation bars
function createNavigationBarToggleButton()
{
    var indexNavigationBar = 0;
    // iterate over all < div >-elements 
    var divs = document.getElementsByTagName("div");
    for (var i = 0; NavFrame = divs[i]; i++) {
        // if found a navigation bar
        if (hasClass(NavFrame, "NavFrame")) {

            indexNavigationBar++;
            var NavToggle = document.createElement("a");
            NavToggle.className = 'NavToggle';
            NavToggle.setAttribute('id', 'NavToggle' + indexNavigationBar);
            NavToggle.setAttribute('href', 'javascript:toggleNavigationBar(' + indexNavigationBar + ');');

            var isCollapsed = hasClass( NavFrame, "collapsed" );
            /*
             * Check if any children are already hidden.  This loop is here for backwards compatibility:
             * the old way of making NavFrames start out collapsed was to manually add style="display:none"
             * to all the NavPic/NavContent elements.  Since this was bad for accessibility (no way to make
             * the content visible without JavaScript support), the new recommended way is to add the class
             * "collapsed" to the NavFrame itself, just like with collapsible tables.
             */
            for (var NavChild = NavFrame.firstChild; NavChild != null && !isCollapsed; NavChild = NavChild.nextSibling) {
                if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
                    if ( NavChild.style.display == 'none' ) {
                        isCollapsed = true;
                    }
                }
            }
            if (isCollapsed) {
                for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
                    if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
                        NavChild.style.display = 'none';
                    }
                }
            }
            var NavToggleText = document.createTextNode(isCollapsed ? NavigationBarShow : NavigationBarHide);
            NavToggle.appendChild(NavToggleText);

            // Find the NavHead and attach the toggle link (Must be this complicated because Moz's firstChild handling is borked)
            for(var j=0; j < NavFrame.childNodes.length; j++) {
                if (hasClass(NavFrame.childNodes[j], "NavHead")) {
                    NavFrame.childNodes[j].appendChild(NavToggle);
                }
            }
            NavFrame.setAttribute('id', 'NavFrame' + indexNavigationBar);
        }
    }
}

addOnloadHook( createNavigationBarToggleButton );


/*
	EXPAND HIDDEN TEMPLATES
	Description: Expands and collapses hidden templates on a page.
		Templates affected include {{hidden}}, {{hidden archive top}}, and their derivatives.
	Documentation: [[Wikipedia:Expand Hidden Templates]]
	Link: [[User:Gary King/expand hidden templates.js]]
*/
 
if (typeof(unsafeWindow) != 'undefined')
{
	var addPortletLink = unsafeWindow.addPortletLink;
	var collapseTable = unsafeWindow.collapseTable;
	var expandHiddenTemplates = expandHiddenTemplates;
	var toggleNavigationBar = unsafeWindow.toggleNavigationBar;
	var wgAction = unsafeWindow.wgAction;
}
 
if (typeof(expandHiddenTemplates) == 'undefined')
	expandHiddenTemplates = {};
 
expandHiddenTemplatesMain = function()
{
	var nodeText = document.getElementById('t-expand-hidden-templates').firstChild.firstChild.firstChild;
	if (nodeText.nodeValue == 'Expand templates')
		var action = 'expanding';
	else
		var action = 'collapsing';
 
	// .collapseButton
	var buttons = document.getElementsByClassName('collapseButton');
	for (var i = 0; i < buttons.length; i++)
	{
		if (
			(action == 'expanding' && buttons[i].childNodes[1].firstChild.nodeValue == 'show')
			|| (action == 'collapsing' && buttons[i].childNodes[1].firstChild.nodeValue == 'hide')
		)
			buttons[i].childNodes[1].click(); // IE-only?
	}
 
	// .NavToggle
	var toggles = document.getElementsByClassName('NavToggle');
	for (var i = 0; i < toggles.length; i++)
	{
		if (
			(action == 'expanding' && toggles[i].firstChild.nodeValue == '[show]')
			|| (action == 'collapsing' && toggles[i].firstChild.nodeValue == '[hide]')
		)
		toggles[i].click(); // IE-only?
	}
 
	if (buttons.length == 0 && toggles.length == 0)
		alert('There are no templates to expand on this page.');
	else
	{
		if (action == 'expanding')
			nodeText.nodeValue = 'Collapse templates';
		else
			nodeText.nodeValue = 'Expand templates';
	}
}
 
expandHiddenTemplatesPortletLink = function()
{
	if (addPortletLink)
	{
		if ((wgAction != 'view' && wgAction != 'submit' && wgAction != 'edit' && wgAction != 'purge') || navigator.appName.indexOf('Microsoft Internet Explorer') == -1)
			return;
 
		var buttons = document.getElementsByClassName('collapseButton');
		var toggles = document.getElementsByClassName('NavToggle');
 
		if (buttons.length + toggles.length == 0)
			return;
 
		if (typeof(expandHiddenTemplates) == 'undefined')
			expandHiddenTemplates = {};
 
		if (typeof(expandHiddenTemplates.addTab) == 'undefined')
			expandHiddenTemplates.addTab = false;
 
		if (typeof(expandHiddenTemplates.addToNavigation) == 'undefined')
			expandHiddenTemplates.addToNavigation = false;
 
		if (expandHiddenTemplates.addTab)
			addPortletLink('p-cactions', 'javascript:expandHiddenTemplatesMain()', 'Expand templates', 't-expand-hidden-templates', 'Expands or hides all collapsible templates');
		if (expandHiddenTemplates.addToNavigation)
			addPortletLink('p-navigation', 'javascript:expandHiddenTemplatesMain()', 'Expand templates', 't-expand-hidden-templates', 'Expands or hides all collapsible templates');
		if (!expandHiddenTemplates.addTab && !expandHiddenTemplates.addToNavigation)
			addPortletLink('p-tb', 'javascript:expandHiddenTemplatesMain()', 'Expand templates', 't-expand-hidden-templates', 'Expands or hides all collapsible templates');
	}
}
 
if (typeof(unsafeWindow) == 'undefined')
	addOnloadHook(expandHiddenTemplatesPortletLink);
else
	expandHiddenTemplatesPortletLink();
 
if (typeof(unsafeWindow) != 'undefined')
	unsafeWindow.expandHiddenTemplatesMain = expandHiddenTemplatesMain;