MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
/**
 * Page loader
 *
 * Allows a page to be downloaded and displayed on demand.
 * Use with [[Template:LoadPage]] and [[Template:LoadBox]]
 */
( function() {
	var $loadPage = $wikipageContent.find( '.load-page' );
	if ( !$loadPage.length ) {
		return;
	}
	
	// We need the spinner to show loading is happening, but we don't want
	// to have a delay while the module downloads, so we'll load this now,
	// regardless of if something is clicked
	mw.loader.load( 'jquery.spinner' );
	
	// Create button starting with hide text
	// Will be changed to the show text while calculating the maximum button size
	var $buttonTemplate = $( '<span>' ).addClass( 'mw-editsection-like load-page-button' )
		.append( '[', $( '<span>' ).addClass( 'jslink' ).text( i18n.hideText ), ']' );
	
	var extractList = function( $contentContainer, listClass ) {
		var $content = $contentContainer.find( '.mw-parser-output > ul > li > ul' ).children();
		if ( listClass ) {
			$content.addClass( listClass );
		}
		
		return $content;
	};
	
	$loadPage.each( function() {
		var $body = $( this );
		var page = $body.data( 'page' );
		if ( !page ) {
			return;
		}
		
		var template = $body.data( 'template' );
		var treeview = $body.data( 'treeview' );
		var treeviewClass = $body.data( 'treeviewclass' );
		var $heading;
		var $contentContainer;
		var $content;
		var $button = $buttonTemplate.clone();
		var $buttonLink = $button.find( '.jslink' );
		if ( treeview ) {
			$heading = $body;
			$contentContainer = $( '<div>' );
		} else {
			$heading = $body.children().first();
			$contentContainer = $body.find( '.load-page-content' );
		}
		
		// Add the button
		$heading.append( $button );
		
		// Move the edit button to the right spot
		$contentContainer.find( '.mw-editsection, .mw-editsection-like' ).insertAfter( $button );
		
		// Find max button width, and set its min-width to it
		var hideWidth = $button.width();
		$buttonLink.text( i18n.showText );
		var showWidth = $button.width();
		
		if ( hideWidth !== showWidth ) {
			$button.css( 'min-width', hideWidth > showWidth ? hideWidth : showWidth );
		}
		
		$buttonLink.click( function() {
			if ( $body.hasClass( 'pageloader-contentloaded' ) ) {
				if ( $buttonLink.text() === i18n.showText ) {
					if ( treeview ) {
						$content.insertAfter( $body );
					} else {
						$contentContainer.show();
					}
					$buttonLink.text( i18n.hideText );
				} else {
					if ( treeview ) {
						$content.children(".load-page-button").children(".jslink").each(function() {
							if ($(this).text() === i18n.hideText) this.click();
						});
						$content.detach();
					} else {
						$contentContainer.hide();
					}
					$buttonLink.text( i18n.showText );
				}
				return;
			}
			
			// See if this was loaded elsewhere before making a request
			var gotContent;
			$( '.pageloader-contentloaded' ).each( function() {
				var $fLoader = $( this );
				if ( $fLoader.data( 'page' ) === page && $fLoader.data( 'pageloader-content' ) ) {
					$contentContainer.html( $fLoader.data( 'pageloader-content' ) ).removeClass( 'noscript' );
					mw.hook( 'wikipage.content' ).fire( $contentContainer );
					
					if ( treeview ) {
						$body.find( '.noscript' ).remove();
						$content = extractList( $contentContainer, treeviewClass );
						$content.insertAfter( $body );
					}
					
					$buttonLink.text( i18n.hideText );
					$body.addClass( 'pageloader-contentloaded' );
					gotContent = true;
					return false;
				}
			} );
			if ( gotContent ) {
				return;
			}
			
			// Just in-case the spinner module is still not ready yet
			var $spinner = $();
			mw.loader.using( 'jquery.spinner', function() {
				// $spinner will be false if the content somehow loaded before the module did
				if ( $spinner ) {
					$spinner = $.createSpinner().addClass( 'mw-editsection-like' )
						.css( 'min-width', $button.css( 'min-width' ) );
					$button.hide().after( $spinner );
				}
			} );
			
			var requestData = {
				action: 'parse',
				prop: 'text|modules|jsconfigvars'
			};
			if ( template ) {
				requestData.page = page;
			} else {
				requestData.title = mw.config.get( 'wgPageName' );
				requestData.text = '{' + '{:' + page + '}}';
			}
			new mw.Api().get( requestData ).done( function( data ) {
				// Add config and modules
				if ( data.parse.jsconfigvars ) {
					mw.config.set( data.parse.jsconfigvars );
				}
				if ( data.parse.modules ) {
					mw.loader.load( data.parse.modules.concat(
						data.parse.modulescripts,
						data.parse.modulestyles
					) );
				}
				
				var html = data.parse.text['*'];
				$contentContainer.html( html ).removeClass( 'noscript' );
				
				// Resolve self-links
				if ( template ) {
					var curPage = '/' + mw.config.get( 'wgPageName' );
					$contentContainer.find( 'a' ).each( function() {
						var $link = $( this );
						if ( $link.attr( 'href' ) === curPage ) {
							$link.replaceWith( $( '<strong>' ).addClass( 'selflink' ).append( $link.contents() ) );
						}
					} );
					html = $contentContainer.html();
				}
				
				$body.data( 'pageloader-content', html );
				
				// Fire content hook on the new content, running all this stuff again and more :)
				mw.hook( 'wikipage.content' ).fire( $contentContainer );
				
				if ( treeview ) {
					$body.find( '.noscript' ).remove();
					$content = extractList( $contentContainer, treeviewClass );
					$content.insertAfter( $body );
				}
				
				$spinner.remove();
				$spinner = false;
				$buttonLink.text( i18n.hideText );
				$button.show();
				$body.addClass( 'pageloader-contentloaded' );
			} ).fail( function( _, error ) {
				$spinner.remove();
				$spinner = false;
				$button.show();
				
				var errorText = '';
				if ( error.textStatus ) {
					errorText = error.textStatus;
				} else if ( error.error ) {
					errorText = error.error.info;
				}
				
				mw.notify( errorText, { title: i18n.loadErrorTitle, autoHide: false } );
			} );
		} );
	} );
}() );