From: Daniel Friesen <dantman@users.mediawiki.org>
Date: Thu, 15 Sep 2011 15:47:15 +0000 (+0000)
Subject: Implement DerivativeContext. Can be used to inherit context from another context... 
X-Git-Tag: 1.31.0-rc.0~27639
X-Git-Url: http://git.cyclocoop.org/%22.%24h.%22?a=commitdiff_plain;h=900a0adad944ca6e694dd22d42aa8a2b8a502234;p=lhc%2Fweb%2Fwiklou.git

Implement DerivativeContext. Can be used to inherit context from another context while overriding only parts of the context.
---

diff --git a/includes/RequestContext.php b/includes/RequestContext.php
index 298ab275ca..2d2dc66dd5 100644
--- a/includes/RequestContext.php
+++ b/includes/RequestContext.php
@@ -444,3 +444,191 @@ abstract class ContextSource implements IContextSource {
 		return call_user_func_array( array( $this->getContext(), 'msg' ), func_get_args() );
 	}
 }
+
+/**
+ * An IContextSource implementation which will inherit context from another source
+ * but allow individual pieces of context to be changed locally
+ * eg: A ContextSource that can inherit from the main RequestContext but have
+ *     a different Title instance set on it.
+ */
+class DerivativeContext extends ContextSource {
+
+	/**
+	 * @var WebRequest
+	 */
+	private $request;
+
+	/**
+	 * @var Title
+	 */
+	private $title;
+
+	/**
+	 * @var OutputPage
+	 */
+	private $output;
+
+	/**
+	 * @var User
+	 */
+	private $user;
+
+	/**
+	 * @var Language
+	 */
+	private $lang;
+
+	/**
+	 * @var Skin
+	 */
+	private $skin;
+
+	/**
+	 * Constructor
+	 * @param $context IContextSource Context to inherit from
+	 */
+	public function __construct( IContextSource $context ) {
+		$this->setContext( $context );
+	}
+
+	/**
+	 * Set the WebRequest object
+	 *
+	 * @param $r WebRequest object
+	 */
+	public function setRequest( WebRequest $r ) {
+		$this->request = $r;
+	}
+
+	/**
+	 * Get the WebRequest object
+	 *
+	 * @return WebRequest
+	 */
+	public function getRequest() {
+		if ( !is_null( $this->request ) ) {
+			return $this->request;
+		} else {
+			return $this->getContext()->getRequest();
+		}
+	}
+
+	/**
+	 * Set the Title object
+	 *
+	 * @param $t Title object
+	 */
+	public function setTitle( Title $t ) {
+		$this->title = $t;
+	}
+
+	/**
+	 * Get the Title object
+	 *
+	 * @return Title
+	 */
+	public function getTitle() {
+		if ( !is_null( $this->title ) ) {
+			return $this->title;
+		} else {
+			return $this->getContext()->getTitle();
+		}
+	}
+
+	/**
+	 * @param $o OutputPage
+	 */
+	public function setOutput( OutputPage $o ) {
+		$this->output = $o;
+	}
+
+	/**
+	 * Get the OutputPage object
+	 *
+	 * @return OutputPage object
+	 */
+	public function getOutput() {
+		if ( !is_null( $this->output ) ) {
+			return $this->output;
+		} else {
+			return $this->getContext()->getOutput();
+		}
+	}
+
+	/**
+	 * Set the User object
+	 *
+	 * @param $u User
+	 */
+	public function setUser( User $u ) {
+		$this->user = $u;
+	}
+
+	/**
+	 * Get the User object
+	 *
+	 * @return User
+	 */
+	public function getUser() {
+		if ( !is_null( $this->user ) ) {
+			return $this->user;
+		} else {
+			return $this->getContext()->getUser();
+		}
+	}
+
+	/**
+	 * Set the Language object
+	 *
+	 * @param $l Mixed Language instance or language code
+	 */
+	public function setLang( $l ) {
+		if ( $l instanceof Language ) {
+			$this->lang = $l;
+		} elseif ( is_string( $l ) ) {
+			$l = self::sanitizeLangCode( $l );
+			$obj = Language::factory( $l );
+			$this->lang = $obj;
+		} else {
+			throw new MWException( __METHOD__ . " was passed an invalid type of data." );
+		}
+	}
+
+	/**
+	 * Get the Language object
+	 *
+	 * @return Language
+	 */
+	public function getLang() {
+		if ( !is_null( $this->lang ) ) {
+			return $this->lang;
+		} else {
+			return $this->getContext()->getLang();
+		}
+	}
+
+	/**
+	 * Set the Skin object
+	 *
+	 * @param $s Skin
+	 */
+	public function setSkin( Skin $s ) {
+		$this->skin = clone $s;
+		$this->skin->setContext( $this );
+	}
+
+	/**
+	 * Get the Skin object
+	 *
+	 * @return Skin
+	 */
+	public function getSkin() {
+		if ( !is_null( $this->skin ) ) {
+			return $this->skin;
+		} else {
+			return $this->getContext()->getSkin();
+		}
+	}
+
+}
+