MediaWiki:Common.js

//================================================================================
//*** Dynamic Navigation Bars

// set up max count of Navigation Bars on page,
// if there are more, all will be hidden
// mw.user.options.set( 'NavigationBarShowDefault', 0 ); // all bars will be hidden
// mw.user.options.set( 'NavigationBarShowDefault', 1 ); // on pages with more than 1 bar all bars will be hidden

// adds show/hide-button to navigation bars
// using 'jquery.makeCollapsible': for messages
// using 'user', 'mediawiki.user', 'user.options': wait for overrides in user.js
mw.loader.using( [ 'jquery.makeCollapsible', 'user', 'mediawiki.user', 'user.options' ], function() { mw.hook( 'wikipage.content' ).add( function( $content ) {
	// allow setting NavigationBarShowDefault
	var showDefaultCount = mw.user.options.get( 'NavigationBarShowDefault',
		typeof NavigationBarShowDefault !== 'undefined' ? NavigationBarShowDefault : 1 );
	// allow user overrides for b/c
	var textHide = typeof NavigationBarHide === 'string' ? NavigationBarHide : mw.msg( 'collapsible-collapse' );
	var textShow = typeof NavigationBarShow === 'string' ? NavigationBarShow : mw.msg( 'collapsible-expand' );

	// shows and hides content and picture (if available) of navigation bars
	// Parameters:
	//     indexNavigationBar: the index of navigation bar to be toggled
	function toggleNavigationBar(NavToggle, NavFrame)
	{
		if (!NavFrame || !NavToggle) {
			return false;
		}

		// if shown now
		if (NavToggle.firstChild.data === textHide) {
			for (
					var NavChild = NavFrame.firstChild;
					NavChild !== null;
					NavChild = NavChild.nextSibling
				) {
				if (NavChild.className === 'NavPic' || NavChild.className === 'NavContent') {
					NavChild.style.display = 'none';
				}
			}
			NavToggle.firstChild.data = textShow;

		// if hidden now
		} else if (NavToggle.firstChild.data === textShow) {
			for (
					var NavChild = NavFrame.firstChild;
					NavChild !== null;
					NavChild = NavChild.nextSibling
				) {
				if (NavChild.className === 'NavPic' || NavChild.className === 'NavContent') {
					NavChild.style.display = 'block';
				}
			}
			NavToggle.firstChild.data = textHide;
		}
	}

	function toggleNavigationBarFunction(NavToggle, NavFrame) {
		return function() {
			toggleNavigationBar(NavToggle, NavFrame);
			return false;
		};
	}
	// iterate over all NavFrames
	var NavFrames = $content.find( 'div.NavFrame' );

	// if more Navigation Bars found and not template namespace than Default: hide all
	var initiallyToggle	= showDefaultCount < NavFrames.length && mw.config.get( 'wgNamespaceNumber' ) !== 10;
	for (var i=0; i<NavFrames.length; i++) {
		var NavFrame = NavFrames[i];
		var NavToggle = document.createElement("a");
		NavToggle.className = 'NavToggle';
		NavToggle.setAttribute('href', '#');

		var NavToggleText = document.createTextNode(textHide);
		NavToggle.appendChild(NavToggleText);

		// add NavToggle-Button as first div-element
		// in < div class="NavFrame" >
		NavFrame.insertBefore(NavToggle, NavFrame.firstChild);

		NavToggle.onclick = toggleNavigationBarFunction(NavToggle, NavFrame);
		if (initiallyToggle) {
			toggleNavigationBar(NavToggle, NavFrame);
		} else { // make sure that 'display' is always set for every NavFrame
			for (
					var NavChild = NavFrame.firstChild;
					NavChild !== null;
					NavChild = NavChild.nextSibling
				) {
				if (NavChild.className === 'NavPic' || NavChild.className === 'NavContent') {
					NavChild.style.display = 'block';
				}
			}
		}
	}
})});