MediaWiki:Gadget-site.js

/**
 * Collapsible elements
 *
 * Add the "collapsible" class to an element and the child element with class "collapsible-content"
 * (or everything but the header row if a table) will be hidden when the element is collapsed.
 *
 * * Add the class "collapsed" to the element to make it start out collapsed.
 * * Add either "collapsetoggle-left" or "collapsetoggle-inline" to the element to choose the collapse
 *   toggle alignment (defaults to right).
 * * Add an ID in the format of "collapsible-<x>" to the element to make any element with the class
 *  "collapsetoggle-custom" and a matching class in the format of "collapsible-<x>-toggle" control
 *   the collapsing instead of the standard button.
 *   If the custom toggle contains an element with the "jslink" class, only that will be clickable.
 */
( function() {
	var $collapsibles = $wikipageContent.find( '.collapsible' );
	if ( !$collapsibles.length ) {
		return;
	}
	
	var $toggleTemplate = $( '<span>' ).addClass( 'collapsetoggle' ).append(
		'[', $( '<span>' ).addClass( 'jslink' ), ']'
	);
	$collapsibles.each( function() {
		var $collapsible = $( this );
		if ( $collapsible.data( 'made-collapsible' ) ) {
			return true;
		}
		
		var $children = $collapsible.children();
		var showText = $collapsible.data( 'expandtext' ) || i18n.showText;
		var hideText = $collapsible.data( 'collapsetext' ) || i18n.hideText;
		
		// If there is no content area, add it
		if ( !$collapsible.is( 'table' ) && !$children.filter( '.collapsible-content' ).length ) {
			if ( $collapsible.is( 'tr.collapsible-rows' ) ) {
				var $collapsibleRows = $collapsible.nextUntil( '.collapsible-rows' );
				if ( $collapsibleRows.hasClass( 'collapsible-row' ) ) {
					$collapsibleRows = $collapsibleRows.filter( 'collapsible-row' );
				} else {
					$collapsibleRows.addClass( 'collapsible-row' );
				}
				if ( $collapsible.hasClass( 'collapsed' ) && !$collapsibleRows.hasClass( 'collapsed' ) ) {
					$collapsibleRows.addClass( 'collapsed' );
				}
				$collapsible = $collapsible.add( $collapsibleRows );
			} else if ( $collapsible.is( 'tr' ) ) {
				$children.addClass( 'collapsible-content' );
			} else {
				$collapsible.wrapInner( '<div class="collapsible-content">' );
				$children = $collapsible.children();
			}
		}
		
		var $toggle;
		var id = $collapsible.attr( 'id' );
		if ( id && id.match( /^collapsible-./ ) ) {
			$toggle = $( $wikipageContent[0].getElementsByClassName( id + '-toggle' ) )
				.filter( '.collapsetoggle-custom' ).css( 'visibility', 'visible' );
		}
		
		// Create and insert the toggle button if there is no custom one
		if ( !$toggle || !$toggle.length ) {
			var $toggleContainer;
			if ( $collapsible.is( 'table' ) ) {
				var $rows = $children.filter( 'thead' ).children();
				if ( !$rows.length ) {
					$rows = $children.filter( 'tbody' ).first().children();
					if ( !$rows.length ) {
						$rows = $children.filter( 'tr' );
					}
				}
				$toggleContainer = $rows.first().children().last();
			} else {
				$toggleContainer = $children.first();
				if ( $toggleContainer.hasClass( 'collapsible-content' ) ) {
					$toggleContainer = $collapsible;
				}
			}
			
			$toggle = $toggleTemplate.clone();
			if (
				$toggleContainer !== $collapsible && (
				$collapsible.hasClass( 'collapsetoggle-inline' ) ||
				$collapsible.hasClass( 'collapse-button-none' )
			) ) {
				$toggleContainer.append( $toggle );
			} else {
				$toggleContainer.prepend( $toggle );
			}
		}
		
		var $toggleLink = $toggle.find( '.jslink' );
		if ( !$toggleLink.length ) {
			$toggleLink = $toggle;
		}
		$toggleLink.attr( 'tabindex', 0 ).text( hideText );
		
		// Find max toggle size, and set its min-width to it
		var hideWidth = $toggle.width();
		$toggleLink.text( showText );
		var showWidth = $toggle.width();
		if ( hideWidth !== showWidth ) {
			$toggle.css( 'min-width', hideWidth > showWidth ? hideWidth : showWidth );
		}
		
		// Set the text back to hide if it's not collapsed to begin with
		if ( !$collapsible.first().hasClass( 'collapsed' ) ) {
			$toggleLink.text( hideText );
		}
		
		$toggleLink.on( 'click keydown', function( e ) {
			// Only trigger on enter press
			if ( e.keyCode && e.keyCode !== 13 ) {
				return;
			}
			
			// Don't toggle when clicking buttons or links inside the toggle
			var $target = $( e.target );
			if ( $target.is( 'button' ) || $target.is( 'a' ) ) {
				return;
			}
			
			$collapsible.toggleClass( 'collapsed' );
			if ( $collapsible.first().hasClass( 'collapsed' ) ) {
				$toggleLink.text( showText );
			} else {
				$toggleLink.text( hideText );
			}
			
			// Stop table sorting activating when clicking the link
			e.stopPropagation();
		} );
		
		$collapsible.data( 'made-collapsible', true );
	} );
}() );