(Bug 15936) New page's patrol button should always be visible

includes/Article.php

@@ -967,6 +967,13 @@ class Article {
 			$wgOut->addWikiMsg('anontalkpagetext');
 		}
 
+		# Only diffs and new page links from RC give rcid params, so if
+		# we are just viewing the page normally with no rcid, try to find it. 
+		# This is more convenient for users.
+		if( empty($rcid) && $this->mTitle->userCan('patrol') ) {
+			$firstRev = $this->mTitle->getFirstRevision();
+			$rcid = $firstRev->isUnpatrolled();
+		}
 		# If we have been passed an &rcid= parameter, we want to give the user a
 		# chance to mark this new article as patrolled.
 		if( !empty($rcid) && $this->mTitle->exists() && $this->mTitle->userCan('patrol') ) {

includes/Revision.php

@@ -363,6 +363,7 @@ class Revision {
 		} else {
 			throw new MWException( 'Revision constructor passed invalid row format.' );
 		}
+		$this->mUnpatrolled = NULL;
 	}
 
 	/**#@+
@@ -536,6 +537,27 @@ class Revision {
 	public function isMinor() {
 		return (bool)$this->mMinorEdit;
 	}
+	
+	/**
+	 * @return int rcid of the unpatrolled row, zero if there isn't one
+	 */
+	public function isUnpatrolled() {
+		if( $this->mUnpatrolled !== NULL ) {
+			return $this->mUnpatrolled;
+		}
+		$dbr = wfGetDB( DB_SLAVE );
+		$this->mUnpatrolled = $dbr->selectField( 'recentchanges',
+			'rc_id',
+			array( // Add redundant user,timestamp condition so we can use the existing index
+				'rc_user_text'  => $this->getRawUserText(),
+				'rc_timestamp'  => $dbr->timestamp( $this->getTimestamp() ),
+				'rc_this_oldid' => $this->getId(),
+				'rc_patrolled'  => 0
+			),
+			__METHOD__
+		);
+		return (int)$this->mUnpatrolled;
+	}
 
 	/**
 	 * int $field one of DELETED_* bitfield constants

includes/Title.php

@@ -3033,6 +3033,28 @@ class Title {
 		);
 	}
 	
+	/**
+	 * Get the first revision of the page
+	 *
+	 * @param $flags \type{\int} GAID_FOR_UPDATE
+	 * @return Revision (or NULL if page doesn't exist)
+	 */
+	public function getFirstRevision( $flags=0 ) {
+		$db = ($flags & GAID_FOR_UPDATE) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE );
+		$pageId = $this->getArticleId($flags);
+		if( !$pageId ) return NULL;
+		$row = $db->selectRow( 'revision', '*',
+			array( 'rev_page' => $pageId ),
+			__METHOD__,
+			array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 1 )
+		);
+		if( !$row ) {
+			return NULL;
+		} else {
+			return new Revision( $row );
+		}
+	}
+	
 	/**
 	 * Check if this is a new page
 	 *