From ca32f08966f1b51fcb19460f0996bb0c4048e6fe Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Sat, 3 Dec 2011 13:29:22 +0100
Subject: Update to MediaWiki 1.18.0

* also update ArchLinux skin to chagnes in MonoBook
* Use only css to hide our menu bar when printing
---
 includes/cache/LinkCache.php | 219 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 219 insertions(+)
 create mode 100644 includes/cache/LinkCache.php

(limited to 'includes/cache/LinkCache.php')

diff --git a/includes/cache/LinkCache.php b/includes/cache/LinkCache.php
new file mode 100644
index 00000000..aeb10eb0
--- /dev/null
+++ b/includes/cache/LinkCache.php
@@ -0,0 +1,219 @@
+<?php
+/**
+ * Cache for article titles (prefixed DB keys) and ids linked from one source
+ *
+ * @ingroup Cache
+ */
+class LinkCache {
+	// Increment $mClassVer whenever old serialized versions of this class
+	// becomes incompatible with the new version.
+	private $mClassVer = 4;
+
+	private $mGoodLinks, $mBadLinks;
+	private $mForUpdate;
+
+	/**
+	 * Get an instance of this class
+	 *
+	 * @return LinkCache
+	 */
+	static function &singleton() {
+		static $instance;
+		if ( !isset( $instance ) ) {
+			$instance = new LinkCache;
+		}
+		return $instance;
+	}
+
+	function __construct() {
+		$this->mForUpdate = false;
+		$this->mGoodLinks = array();
+		$this->mGoodLinkFields = array();
+		$this->mBadLinks = array();
+	}
+
+	/**
+	 * General accessor to get/set whether SELECT FOR UPDATE should be used
+	 *
+	 * @return bool
+	 */
+	public function forUpdate( $update = null ) {
+		return wfSetVar( $this->mForUpdate, $update );
+	}
+
+	/**
+	 * @param $title
+	 * @return array|int
+	 */
+	public function getGoodLinkID( $title ) {
+		if ( array_key_exists( $title, $this->mGoodLinks ) ) {
+			return $this->mGoodLinks[$title];
+		} else {
+			return 0;
+		}
+	}
+
+	/**
+	 * Get a field of a title object from cache.
+	 * If this link is not good, it will return NULL.
+	 * @param $title Title
+	 * @param $field String: ('length','redirect','revision')
+	 * @return mixed
+	 */
+	public function getGoodLinkFieldObj( $title, $field ) {
+		$dbkey = $title->getPrefixedDbKey();
+		if ( array_key_exists( $dbkey, $this->mGoodLinkFields ) ) {
+			return $this->mGoodLinkFields[$dbkey][$field];
+		} else {
+			return null;
+		}
+	}
+
+	/**
+	 * @param $title
+	 * @return bool
+	 */
+	public function isBadLink( $title ) {
+		return array_key_exists( $title, $this->mBadLinks );
+	}
+
+	/**
+	 * Add a link for the title to the link cache
+	 *
+	 * @param $id Integer: page's ID
+	 * @param $title Title object
+	 * @param $len Integer: text's length
+	 * @param $redir Integer: whether the page is a redirect
+	 * @param $revision Integer: latest revision's ID
+	 */
+	public function addGoodLinkObj( $id, $title, $len = -1, $redir = null, $revision = false ) {
+		$dbkey = $title->getPrefixedDbKey();
+		$this->mGoodLinks[$dbkey] = intval( $id );
+		$this->mGoodLinkFields[$dbkey] = array(
+			'length' => intval( $len ),
+			'redirect' => intval( $redir ),
+			'revision' => intval( $revision ) );
+	}
+
+	/**
+	 * @param $title Title
+	 */
+	public function addBadLinkObj( $title ) {
+		$dbkey = $title->getPrefixedDbKey();
+		if ( !$this->isBadLink( $dbkey ) ) {
+			$this->mBadLinks[$dbkey] = 1;
+		}
+	}
+
+	public function clearBadLink( $title ) {
+		unset( $this->mBadLinks[$title] );
+	}
+
+	/**
+	 * @param $title Title
+	 */
+	public function clearLink( $title ) {
+		$dbkey = $title->getPrefixedDbKey();
+		if( isset($this->mBadLinks[$dbkey]) ) {
+			unset($this->mBadLinks[$dbkey]);
+		}
+		if( isset($this->mGoodLinks[$dbkey]) ) {
+			unset($this->mGoodLinks[$dbkey]);
+		}
+		if( isset($this->mGoodLinkFields[$dbkey]) ) {
+			unset($this->mGoodLinkFields[$dbkey]);
+		}
+	}
+
+	public function getGoodLinks() { return $this->mGoodLinks; }
+	public function getBadLinks() { return array_keys( $this->mBadLinks ); }
+
+	/**
+	 * Add a title to the link cache, return the page_id or zero if non-existent
+	 *
+	 * @param $title String: title to add
+	 * @return Integer
+	 */
+	public function addLink( $title ) {
+		$nt = Title::newFromDBkey( $title );
+		if( $nt ) {
+			return $this->addLinkObj( $nt );
+		} else {
+			return 0;
+		}
+	}
+
+	/**
+	 * Add a title to the link cache, return the page_id or zero if non-existent
+	 *
+	 * @param $nt Title object to add
+	 * @return Integer
+	 */
+	public function addLinkObj( $nt ) {
+		global $wgAntiLockFlags;
+		wfProfileIn( __METHOD__ );
+
+		$key = $nt->getPrefixedDBkey();
+		if ( $this->isBadLink( $key ) || $nt->isExternal() ) {
+			wfProfileOut( __METHOD__ );
+			return 0;
+		}
+		$id = $this->getGoodLinkID( $key );
+		if ( $id != 0 ) {
+			wfProfileOut( __METHOD__ );
+			return $id;
+		}
+
+		if ( $key === '' ) {
+			wfProfileOut( __METHOD__ );
+			return 0;
+		}
+
+		# Some fields heavily used for linking...
+		if ( $this->mForUpdate ) {
+			$db = wfGetDB( DB_MASTER );
+			if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
+				$options = array( 'FOR UPDATE' );
+			} else {
+				$options = array();
+			}
+		} else {
+			$db = wfGetDB( DB_SLAVE );
+			$options = array();
+		}
+
+		$s = $db->selectRow( 'page',
+			array( 'page_id', 'page_len', 'page_is_redirect', 'page_latest' ),
+			array( 'page_namespace' => $nt->getNamespace(), 'page_title' => $nt->getDBkey() ),
+			__METHOD__, $options );
+		# Set fields...
+		if ( $s !== false ) {
+			$id = intval( $s->page_id );
+			$len = intval( $s->page_len );
+			$redirect = intval( $s->page_is_redirect );
+			$revision = intval( $s->page_latest );
+		} else {
+			$id = 0;
+			$len = -1;
+			$redirect = 0;
+			$revision = 0;
+		}
+
+		if ( $id == 0 ) {
+			$this->addBadLinkObj( $nt );
+		} else {
+			$this->addGoodLinkObj( $id, $nt, $len, $redirect, $revision );
+		}
+		wfProfileOut( __METHOD__ );
+		return $id;
+	}
+
+	/**
+	 * Clears cache
+	 */
+	public function clear() {
+		$this->mGoodLinks = array();
+		$this->mGoodLinkFields = array();
+		$this->mBadLinks = array();
+	}
+}
-- 
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