Debug mediawiki skin sidebar

debug-mw-sidebar.php

<?php

// Code to output sidebar on original Example skin:
// https://github.com/wikimedia/mediawiki-skins-Example/blob/master/Example.skin.php#L177-L179
foreach ( $this->getSidebar() as $boxName => $box ) {
	$this->outputPortlet( $box );
}

// Code to output sidebar in my modified Example skin:
$this->outputPortlet( array(
		'id' => 'p-navigation',
		'headerMessage' => 'navigation',
//		'content' => $this->data['nav_urls'],
		'content' => $this->data['sidebar']['navigation'],
) );

// What does $this->outputPortlet() do?
// https://github.com/wikimedia/mediawiki-skins-Example/blob/master/Example.skin.php#L40-L74
private function outputPortlet( $box ) {
	
	// ...
	
	if ( is_array( $box['content'] ) ) {
		echo '<ul>';
		foreach ( $box['content'] as $key => $item ) {
			if ( $item ) {
				echo $this->makeListItem( $key, $item );
			}
		}
		echo '</ul>';
	} else {
		echo $box['content'];
	}
	
	// ...
	
}

// I originally used $this->data['nav_urls'] while the original Example code uses $this->getSidebar()
// 1) How is this->data['nav_urls'] set?

	// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/SkinTemplate.php#L456-L457
	$tpl->set( 'sidebar', $this->buildSidebar() );
	$tpl->set( 'nav_urls', $this->buildNavUrls() );

		// What is $tpl?
		// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/SkinTemplate.php#L183
		$tpl = $this->setupTemplate( $this->template, 'skins' );
		
			// What does $this->setupTemplate do?
			// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/SkinTemplate.php#L72-L74
			function setupTemplate( $classname, $repository = false, $cache_dir = false ) {
				return new $classname( $this->getConfig() );
			}

			// Where is $this->template defined?
			// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/SkinTemplate.php#L42-L46
			public $template = 'QuickTemplate';

		// What does $tpl->set() do?
		// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/QuickTemplate.php#L49-L51
		public function set( $name, $value ) {
			$this->data[$name] = $value; // <####################
		}

		// What does $this->buildSidebar() do?
		// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/Skin.php#L1201-L1247
		function buildSidebar() {
			//...
			$this->addToSidebar( $bar, 'sidebar' );
			//...
		}
		
			// What does $this->addToSidebar() do?
			// Add content from MediaWiki:Sidebar
			function addToSidebar( &$bar, $message ) {
				$this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
			}
				
				// Add content from plain text
				function addToSidebarPlain &$bar, $text ) {
					$lines = explode( "\n", $text );
					foreach ( $lines as $line ) {
						// ...
					}
					// ...
				}

		// What does $this->buildNavUrls() do?
		// https://github.com/wikimedia/mediawiki/blob/master/includes/skins/SkinTemplate.php#L1159-L1272
		protected function buildNavUrls() { // <####################
			//...
		}

// 2) What does $this->getSidebar() return?

?>