Update to MediaWiki 1.19.0

1 files changed, 1719 insertions, 0 deletions

diff --git a/includes/filerepo/file/File.php b/includes/filerepo/file/File.php
new file mode 100644
index 00000000..f74fb678
--- /dev/null
+++ b/includes/filerepo/file/File.php
@@ -0,0 +1,1719 @@
+<?php
+/**
+ * @defgroup FileAbstraction File abstraction
+ * @ingroup FileRepo
+ *
+ * Represents files in a repository.
+ */
+
+/**
+ * Base code for files.
+ *
+ * @file
+ * @ingroup FileAbstraction
+ */
+
+/**
+ * Implements some public methods and some protected utility functions which
+ * are required by multiple child classes. Contains stub functionality for
+ * unimplemented public methods.
+ *
+ * Stub functions which should be overridden are marked with STUB. Some more
+ * concrete functions are also typically overridden by child classes.
+ *
+ * Note that only the repo object knows what its file class is called. You should
+ * never name a file class explictly outside of the repo class. Instead use the
+ * repo's factory functions to generate file objects, for example:
+ *
+ * RepoGroup::singleton()->getLocalRepo()->newFile($title);
+ *
+ * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
+ * in most cases.
+ *
+ * @ingroup FileAbstraction
+ */
+abstract class File {
+	const DELETED_FILE = 1;
+	const DELETED_COMMENT = 2;
+	const DELETED_USER = 4;
+	const DELETED_RESTRICTED = 8;
+
+	/** Force rendering in the current process */
+	const RENDER_NOW   = 1;
+	/**
+	 * Force rendering even if thumbnail already exist and using RENDER_NOW
+	 * I.e. you have to pass both flags: File::RENDER_NOW | File::RENDER_FORCE
+	 */
+	const RENDER_FORCE = 2;
+
+	const DELETE_SOURCE = 1;
+
+	/**
+	 * Some member variables can be lazy-initialised using __get(). The
+	 * initialisation function for these variables is always a function named
+	 * like getVar(), where Var is the variable name with upper-case first
+	 * letter.
+	 *
+	 * The following variables are initialised in this way in this base class:
+	 *    name, extension, handler, path, canRender, isSafeFile,
+	 *    transformScript, hashPath, pageCount, url
+	 *
+	 * Code within this class should generally use the accessor function
+	 * directly, since __get() isn't re-entrant and therefore causes bugs that
+	 * depend on initialisation order.
+	 */
+
+	/**
+	 * The following member variables are not lazy-initialised
+	 */
+
+	/**
+	 * @var FileRepo|false
+	 */
+	var $repo;
+
+	/**
+	 * @var Title|false
+	 */
+	var $title;
+
+	var $lastError, $redirected, $redirectedTitle;
+
+	/**
+	 * @var FSFile|false
+	 */
+	protected $fsFile;
+
+	/**
+	 * @var MediaHandler
+	 */
+	protected $handler;
+
+	/**
+	 * @var string
+	 */
+	protected $url, $extension, $name, $path, $hashPath, $pageCount, $transformScript;
+
+	/**
+	 * @var bool
+	 */
+	protected $canRender, $isSafeFile;
+
+	/**
+	 * @var string Required Repository class type
+	 */
+	protected $repoClass = 'FileRepo';
+
+	/**
+	 * Call this constructor from child classes.
+	 *
+	 * Both $title and $repo are optional, though some functions
+	 * may return false or throw exceptions if they are not set.
+	 * Most subclasses will want to call assertRepoDefined() here.
+	 *
+	 * @param $title Title|string|false
+	 * @param $repo FileRepo|false
+	 */
+	function __construct( $title, $repo ) {
+		if ( $title !== false ) { // subclasses may not use MW titles
+			$title = self::normalizeTitle( $title, 'exception' );
+		}
+		$this->title = $title;
+		$this->repo = $repo;
+	}
+
+	/**
+	 * Given a string or Title object return either a
+	 * valid Title object with namespace NS_FILE or null
+	 *
+	 * @param $title Title|string
+	 * @param $exception string|false Use 'exception' to throw an error on bad titles
+	 * @return Title|null
+	 */
+	static function normalizeTitle( $title, $exception = false ) {
+		$ret = $title;
+		if ( $ret instanceof Title ) {
+			# Normalize NS_MEDIA -> NS_FILE
+			if ( $ret->getNamespace() == NS_MEDIA ) {
+				$ret = Title::makeTitleSafe( NS_FILE, $ret->getDBkey() );
+			# Sanity check the title namespace
+			} elseif ( $ret->getNamespace() !== NS_FILE ) {
+				$ret = null;
+			}
+		} else {
+			# Convert strings to Title objects
+			$ret = Title::makeTitleSafe( NS_FILE, (string)$ret );
+		}
+		if ( !$ret && $exception !== false ) {
+			throw new MWException( "`$title` is not a valid file title." );
+		}
+		return $ret;
+	}
+
+	function __get( $name ) {
+		$function = array( $this, 'get' . ucfirst( $name ) );
+		if ( !is_callable( $function ) ) {
+			return null;
+		} else {
+			$this->$name = call_user_func( $function );
+			return $this->$name;
+		}
+	}
+
+	/**
+	 * Normalize a file extension to the common form, and ensure it's clean.
+	 * Extensions with non-alphanumeric characters will be discarded.
+	 *
+	 * @param $ext string (without the .)
+	 * @return string
+	 */
+	static function normalizeExtension( $ext ) {
+		$lower = strtolower( $ext );
+		$squish = array(
+			'htm' => 'html',
+			'jpeg' => 'jpg',
+			'mpeg' => 'mpg',
+			'tiff' => 'tif',
+			'ogv' => 'ogg' );
+		if( isset( $squish[$lower] ) ) {
+			return $squish[$lower];
+		} elseif( preg_match( '/^[0-9a-z]+$/', $lower ) ) {
+			return $lower;
+		} else {
+			return '';
+		}
+	}
+
+	/**
+	 * Checks if file extensions are compatible
+	 *
+	 * @param $old File Old file
+	 * @param $new string New name
+	 *
+	 * @return bool|null
+	 */
+	static function checkExtensionCompatibility( File $old, $new ) {
+		$oldMime = $old->getMimeType();
+		$n = strrpos( $new, '.' );
+		$newExt = self::normalizeExtension( $n ? substr( $new, $n + 1 ) : '' );
+		$mimeMagic = MimeMagic::singleton();
+		return $mimeMagic->isMatchingExtension( $newExt, $oldMime );
+	}
+
+	/**
+	 * Upgrade the database row if there is one
+	 * Called by ImagePage
+	 * STUB
+	 */
+	function upgradeRow() {}
+
+	/**
+	 * Split an internet media type into its two components; if not
+	 * a two-part name, set the minor type to 'unknown'.
+	 *
+	 * @param string $mime "text/html" etc
+	 * @return array ("text", "html") etc
+	 */
+	public static function splitMime( $mime ) {
+		if( strpos( $mime, '/' ) !== false ) {
+			return explode( '/', $mime, 2 );
+		} else {
+			return array( $mime, 'unknown' );
+		}
+	}
+
+	/**
+	 * Return the name of this file
+	 *
+	 * @return string
+	 */
+	public function getName() {
+		if ( !isset( $this->name ) ) {
+			$this->assertRepoDefined();
+			$this->name = $this->repo->getNameFromTitle( $this->title );
+		}
+		return $this->name;
+	}
+
+	/**
+	 * Get the file extension, e.g. "svg"
+	 *
+	 * @return string
+	 */
+	function getExtension() {
+		if ( !isset( $this->extension ) ) {
+			$n = strrpos( $this->getName(), '.' );
+			$this->extension = self::normalizeExtension(
+				$n ? substr( $this->getName(), $n + 1 ) : '' );
+		}
+		return $this->extension;
+	}
+
+	/**
+	 * Return the associated title object
+	 *
+	 * @return Title|false
+	 */
+	public function getTitle() {
+		return $this->title;
+	}
+
+	/**
+	 * Return the title used to find this file
+	 *
+	 * @return Title
+	 */
+	public function getOriginalTitle() {
+		if ( $this->redirected ) {
+			return $this->getRedirectedTitle();
+		}
+		return $this->title;
+	}
+
+	/**
+	 * Return the URL of the file
+	 *
+	 * @return string
+	 */
+	public function getUrl() {
+		if ( !isset( $this->url ) ) {
+			$this->assertRepoDefined();
+			$this->url = $this->repo->getZoneUrl( 'public' ) . '/' . $this->getUrlRel();
+		}
+		return $this->url;
+	}
+
+	/**
+	 * Return a fully-qualified URL to the file.
+	 * Upload URL paths _may or may not_ be fully qualified, so
+	 * we check. Local paths are assumed to belong on $wgServer.
+	 *
+	 * @return String
+	 */
+	public function getFullUrl() {
+		return wfExpandUrl( $this->getUrl(), PROTO_RELATIVE );
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getCanonicalUrl() {
+		return wfExpandUrl( $this->getUrl(), PROTO_CANONICAL );
+	}
+
+	/**
+	 * @return string
+	 */
+	function getViewURL() {
+		if ( $this->mustRender() ) {
+			if ( $this->canRender() ) {
+				return $this->createThumb( $this->getWidth() );
+			} else {
+				wfDebug( __METHOD__.': supposed to render ' . $this->getName() .
+					' (' . $this->getMimeType() . "), but can't!\n" );
+				return $this->getURL(); #hm... return NULL?
+			}
+		} else {
+			return $this->getURL();
+		}
+	}
+
+	/**
+	* Return the storage path to the file. Note that this does
+	* not mean that a file actually exists under that location.
+	*
+	* This path depends on whether directory hashing is active or not,
+	* i.e. whether the files are all found in the same directory,
+	* or in hashed paths like /images/3/3c.
+	*
+	* Most callers don't check the return value, but ForeignAPIFile::getPath
+	* returns false.
+	 *
+	 * @return string|false
+	*/
+	public function getPath() {
+		if ( !isset( $this->path ) ) {
+			$this->assertRepoDefined();
+			$this->path = $this->repo->getZonePath( 'public' ) . '/' . $this->getRel();
+		}
+		return $this->path;
+	}
+
+	/**
+	 * Get an FS copy or original of this file and return the path.
+	 * Returns false on failure. Callers must not alter the file.
+	 * Temporary files are cleared automatically.
+	 *
+	 * @return string|false
+	 */
+	public function getLocalRefPath() {
+		$this->assertRepoDefined();
+		if ( !isset( $this->fsFile ) ) {
+			$this->fsFile = $this->repo->getLocalReference( $this->getPath() );
+			if ( !$this->fsFile ) {
+				$this->fsFile = false; // null => false; cache negative hits
+			}
+		}
+		return ( $this->fsFile )
+			? $this->fsFile->getPath()
+			: false;
+	}
+
+	/**
+	 * Return the width of the image. Returns false if the width is unknown
+	 * or undefined.
+	 *
+	 * STUB
+	 * Overridden by LocalFile, UnregisteredLocalFile
+	 *
+	 * @param $page int
+	 *
+	 * @return number
+	 */
+	public function getWidth( $page = 1 ) {
+		return false;
+	}
+
+	/**
+	 * Return the height of the image. Returns false if the height is unknown
+	 * or undefined
+	 *
+	 * STUB
+	 * Overridden by LocalFile, UnregisteredLocalFile
+	 *
+	 * @param $page int
+	 *
+	 * @return false|number
+	 */
+	public function getHeight( $page = 1 ) {
+		return false;
+	}
+
+	/**
+	 * Returns ID or name of user who uploaded the file
+	 * STUB
+	 *
+	 * @param $type string 'text' or 'id'
+	 *
+	 * @return string|int
+	 */
+	public function getUser( $type = 'text' ) {
+		return null;
+	}
+
+	/**
+	 * Get the duration of a media file in seconds
+	 *
+	 * @return number
+	 */
+	public function getLength() {
+		$handler = $this->getHandler();
+		if ( $handler ) {
+			return $handler->getLength( $this );
+		} else {
+			return 0;
+		}
+	}
+
+	/**
+	 * Return true if the file is vectorized
+	 *
+	 * @return bool
+	 */
+	public function isVectorized() {
+		$handler = $this->getHandler();
+		if ( $handler ) {
+			return $handler->isVectorized( $this );
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Get handler-specific metadata
+	 * Overridden by LocalFile, UnregisteredLocalFile
+	 * STUB
+	 */
+	public function getMetadata() {
+		return false;
+	}
+
+	/**
+	* get versioned metadata
+	*
+	* @param $metadata Mixed Array or String of (serialized) metadata
+	* @param $version integer version number.
+	* @return Array containing metadata, or what was passed to it on fail (unserializing if not array)
+	*/
+	public function convertMetadataVersion($metadata, $version) {
+		$handler = $this->getHandler();
+		if ( !is_array( $metadata ) ) {
+			// Just to make the return type consistent
+			$metadata = unserialize( $metadata );
+		}
+		if ( $handler ) {
+			return $handler->convertMetadataVersion( $metadata, $version );
+		} else {
+			return $metadata;
+		}
+	}
+
+	/**
+	 * Return the bit depth of the file
+	 * Overridden by LocalFile
+	 * STUB
+	 */
+	public function getBitDepth() {
+		return 0;
+	}
+
+	/**
+	 * Return the size of the image file, in bytes
+	 * Overridden by LocalFile, UnregisteredLocalFile
+	 * STUB
+	 */
+	public function getSize() {
+		return false;
+	}
+
+	/**
+	 * Returns the mime type of the file.
+	 * Overridden by LocalFile, UnregisteredLocalFile
+	 * STUB
+	 *
+	 * @return string
+	 */
+	function getMimeType() {
+		return 'unknown/unknown';
+	}
+
+	/**
+	 * Return the type of the media in the file.
+	 * Use the value returned by this function with the MEDIATYPE_xxx constants.
+	 * Overridden by LocalFile,
+	 * STUB
+	 */
+	function getMediaType() {
+		return MEDIATYPE_UNKNOWN;
+	}
+
+	/**
+	 * Checks if the output of transform() for this file is likely
+	 * to be valid. If this is false, various user elements will
+	 * display a placeholder instead.
+	 *
+	 * Currently, this checks if the file is an image format
+	 * that can be converted to a format
+	 * supported by all browsers (namely GIF, PNG and JPEG),
+	 * or if it is an SVG image and SVG conversion is enabled.
+	 *
+	 * @return bool
+	 */
+	function canRender() {
+		if ( !isset( $this->canRender ) ) {
+			$this->canRender = $this->getHandler() && $this->handler->canRender( $this );
+		}
+		return $this->canRender;
+	}
+
+	/**
+	 * Accessor for __get()
+	 */
+	protected function getCanRender() {
+		return $this->canRender();
+	}
+
+	/**
+	 * Return true if the file is of a type that can't be directly
+	 * rendered by typical browsers and needs to be re-rasterized.
+	 *
+	 * This returns true for everything but the bitmap types
+	 * supported by all browsers, i.e. JPEG; GIF and PNG. It will
+	 * also return true for any non-image formats.
+	 *
+	 * @return bool
+	 */
+	function mustRender() {
+		return $this->getHandler() && $this->handler->mustRender( $this );
+	}
+
+	/**
+	 * Alias for canRender()
+	 *
+	 * @return bool
+	 */
+	function allowInlineDisplay() {
+		return $this->canRender();
+	}
+
+	/**
+	 * Determines if this media file is in a format that is unlikely to
+	 * contain viruses or malicious content. It uses the global
+	 * $wgTrustedMediaFormats list to determine if the file is safe.
+	 *
+	 * This is used to show a warning on the description page of non-safe files.
+	 * It may also be used to disallow direct [[media:...]] links to such files.
+	 *
+	 * Note that this function will always return true if allowInlineDisplay()
+	 * or isTrustedFile() is true for this file.
+	 *
+	 * @return bool
+	 */
+	function isSafeFile() {
+		if ( !isset( $this->isSafeFile ) ) {
+			$this->isSafeFile = $this->_getIsSafeFile();
+		}
+		return $this->isSafeFile;
+	}
+
+	/**
+	 * Accessor for __get()
+	 *
+	 * @return bool
+	 */
+	protected function getIsSafeFile() {
+		return $this->isSafeFile();
+	}
+
+	/**
+	 * Uncached accessor
+	 *
+	 * @return bool
+	 */
+	protected function _getIsSafeFile() {
+		global $wgTrustedMediaFormats;
+
+		if ( $this->allowInlineDisplay() ) {
+			return true;
+		}
+		if ($this->isTrustedFile()) {
+			return true;
+		}
+
+		$type = $this->getMediaType();
+		$mime = $this->getMimeType();
+		#wfDebug("LocalFile::isSafeFile: type= $type, mime= $mime\n");
+
+		if ( !$type || $type === MEDIATYPE_UNKNOWN ) {
+			return false; #unknown type, not trusted
+		}
+		if ( in_array( $type, $wgTrustedMediaFormats ) ) {
+			return true;
+		}
+
+		if ( $mime === "unknown/unknown" ) {
+			return false; #unknown type, not trusted
+		}
+		if ( in_array( $mime, $wgTrustedMediaFormats) ) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Returns true if the file is flagged as trusted. Files flagged that way
+	 * can be linked to directly, even if that is not allowed for this type of
+	 * file normally.
+	 *
+	 * This is a dummy function right now and always returns false. It could be
+	 * implemented to extract a flag from the database. The trusted flag could be
+	 * set on upload, if the user has sufficient privileges, to bypass script-
+	 * and html-filters. It may even be coupled with cryptographics signatures
+	 * or such.
+	 *
+	 * @return bool
+	 */
+	function isTrustedFile() {
+		#this could be implemented to check a flag in the database,
+		#look for signatures, etc
+		return false;
+	}
+
+	/**
+	 * Returns true if file exists in the repository.
+	 *
+	 * Overridden by LocalFile to avoid unnecessary stat calls.
+	 *
+	 * @return boolean Whether file exists in the repository.
+	 */
+	public function exists() {
+		return $this->getPath() && $this->repo->fileExists( $this->path );
+	}
+
+	/**
+	 * Returns true if file exists in the repository and can be included in a page.
+	 * It would be unsafe to include private images, making public thumbnails inadvertently
+	 *
+	 * @return boolean Whether file exists in the repository and is includable.
+	 */
+	public function isVisible() {
+		return $this->exists();
+	}
+
+	/**
+	 * @return string
+	 */
+	function getTransformScript() {
+		if ( !isset( $this->transformScript ) ) {
+			$this->transformScript = false;
+			if ( $this->repo ) {
+				$script = $this->repo->getThumbScriptUrl();
+				if ( $script ) {
+					$this->transformScript = "$script?f=" . urlencode( $this->getName() );
+				}
+			}
+		}
+		return $this->transformScript;
+	}
+
+	/**
+	 * Get a ThumbnailImage which is the same size as the source
+	 *
+	 * @param $handlerParams array
+	 *
+	 * @return string
+	 */
+	function getUnscaledThumb( $handlerParams = array() ) {
+		$hp =& $handlerParams;
+		$page = isset( $hp['page'] ) ? $hp['page'] : false;
+		$width = $this->getWidth( $page );
+		if ( !$width ) {
+			return $this->iconThumb();
+		}
+		$hp['width'] = $width;
+		return $this->transform( $hp );
+	}
+
+	/**
+	 * Return the file name of a thumbnail with the specified parameters
+	 *
+	 * @param $params Array: handler-specific parameters
+	 * @private -ish
+	 *
+	 * @return string
+	 */
+	function thumbName( $params ) {
+		return $this->generateThumbName( $this->getName(), $params );
+	}
+
+	/**
+	 * Generate a thumbnail file name from a name and specified parameters
+	 *
+	 * @param string $name
+	 * @param array $params Parameters which will be passed to MediaHandler::makeParamString
+	 *
+	 * @return string
+	 */
+	function generateThumbName( $name, $params ) {
+		if ( !$this->getHandler() ) {
+			return null;
+		}
+		$extension = $this->getExtension();
+		list( $thumbExt, $thumbMime ) = $this->handler->getThumbType(
+			$extension, $this->getMimeType(), $params );
+		$thumbName = $this->handler->makeParamString( $params ) . '-' . $name;
+		if ( $thumbExt != $extension ) {
+			$thumbName .= ".$thumbExt";
+		}
+		return $thumbName;
+	}
+
+	/**
+	 * Create a thumbnail of the image having the specified width/height.
+	 * The thumbnail will not be created if the width is larger than the
+	 * image's width. Let the browser do the scaling in this case.
+	 * The thumbnail is stored on disk and is only computed if the thumbnail
+	 * file does not exist OR if it is older than the image.
+	 * Returns the URL.
+	 *
+	 * Keeps aspect ratio of original image. If both width and height are
+	 * specified, the generated image will be no bigger than width x height,
+	 * and will also have correct aspect ratio.
+	 *
+	 * @param $width Integer: maximum width of the generated thumbnail
+	 * @param $height Integer: maximum height of the image (optional)
+	 *
+	 * @return string
+	 */
+	public function createThumb( $width, $height = -1 ) {
+		$params = array( 'width' => $width );
+		if ( $height != -1 ) {
+			$params['height'] = $height;
+		}
+		$thumb = $this->transform( $params );
+		if ( is_null( $thumb ) || $thumb->isError() ) {
+			return '';
+		}
+		return $thumb->getUrl();
+	}
+
+	/**
+	 * Return either a MediaTransformError or placeholder thumbnail (if $wgIgnoreImageErrors)
+	 * 
+	 * @param $thumbPath string Thumbnail storage path
+	 * @param $thumbUrl string Thumbnail URL
+	 * @param $params Array
+	 * @param $flags integer
+	 * @return MediaTransformOutput
+	 */
+	protected function transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags ) {
+		global $wgIgnoreImageErrors;
+
+		if ( $wgIgnoreImageErrors && !( $flags & self::RENDER_NOW ) ) {
+			return $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+		} else {
+			return new MediaTransformError( 'thumbnail_error',
+				$params['width'], 0, wfMsg( 'thumbnail-dest-create' ) );
+		}
+	}
+
+	/**
+	 * Transform a media file
+	 *
+	 * @param $params Array: an associative array of handler-specific parameters.
+	 *                Typical keys are width, height and page.
+	 * @param $flags Integer: a bitfield, may contain self::RENDER_NOW to force rendering
+	 * @return MediaTransformOutput|false
+	 */
+	function transform( $params, $flags = 0 ) {
+		global $wgUseSquid, $wgIgnoreImageErrors, $wgThumbnailEpoch;
+
+		wfProfileIn( __METHOD__ );
+		do {
+			if ( !$this->canRender() ) {
+				$thumb = $this->iconThumb();
+				break; // not a bitmap or renderable image, don't try
+			}
+
+			// Get the descriptionUrl to embed it as comment into the thumbnail. Bug 19791.
+			$descriptionUrl = $this->getDescriptionUrl();
+			if ( $descriptionUrl ) {
+				$params['descriptionUrl'] = wfExpandUrl( $descriptionUrl, PROTO_CANONICAL );
+			}
+
+			$script = $this->getTransformScript();
+			if ( $script && !( $flags & self::RENDER_NOW ) ) {
+				// Use a script to transform on client request, if possible
+				$thumb = $this->handler->getScriptedTransform( $this, $script, $params );
+				if ( $thumb ) {
+					break;
+				}
+			}
+
+			$normalisedParams = $params;
+			$this->handler->normaliseParams( $this, $normalisedParams );
+
+			$thumbName = $this->thumbName( $normalisedParams );
+			$thumbUrl = $this->getThumbUrl( $thumbName );
+			$thumbPath = $this->getThumbPath( $thumbName ); // final thumb path
+
+			if ( $this->repo ) {
+				// Defer rendering if a 404 handler is set up...
+				if ( $this->repo->canTransformVia404() && !( $flags & self::RENDER_NOW ) ) {
+					wfDebug( __METHOD__ . " transformation deferred." );
+					// XXX: Pass in the storage path even though we are not rendering anything
+					// and the path is supposed to be an FS path. This is due to getScalerType()
+					// getting called on the path and clobbering $thumb->getUrl() if it's false.
+					$thumb = $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+					break;
+				}
+				// Clean up broken thumbnails as needed
+				$this->migrateThumbFile( $thumbName );
+				// Check if an up-to-date thumbnail already exists...
+				wfDebug( __METHOD__.": Doing stat for $thumbPath\n" );
+				if ( $this->repo->fileExists( $thumbPath ) && !( $flags & self::RENDER_FORCE ) ) {
+					$timestamp = $this->repo->getFileTimestamp( $thumbPath );
+					if ( $timestamp !== false && $timestamp >= $wgThumbnailEpoch ) {
+						// XXX: Pass in the storage path even though we are not rendering anything
+						// and the path is supposed to be an FS path. This is due to getScalerType()
+						// getting called on the path and clobbering $thumb->getUrl() if it's false.
+						$thumb = $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+						$thumb->setStoragePath( $thumbPath );
+						break;
+					}
+				} elseif ( $flags & self::RENDER_FORCE ) {
+					wfDebug( __METHOD__ . " forcing rendering per flag File::RENDER_FORCE\n" );
+				}
+			}
+
+			// Create a temp FS file with the same extension and the thumbnail
+			$thumbExt = FileBackend::extensionFromPath( $thumbPath );
+			$tmpFile = TempFSFile::factory( 'transform_', $thumbExt );
+			if ( !$tmpFile ) {
+				$thumb = $this->transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags );
+				break;
+			}
+			$tmpThumbPath = $tmpFile->getPath(); // path of 0-byte temp file
+
+			// Actually render the thumbnail...
+			$thumb = $this->handler->doTransform( $this, $tmpThumbPath, $thumbUrl, $params );
+			$tmpFile->bind( $thumb ); // keep alive with $thumb
+
+			if ( !$thumb ) { // bad params?
+				$thumb = null;
+			} elseif ( $thumb->isError() ) { // transform error
+				$this->lastError = $thumb->toText();
+				// Ignore errors if requested
+				if ( $wgIgnoreImageErrors && !( $flags & self::RENDER_NOW ) ) {
+					$thumb = $this->handler->getTransform( $this, $tmpThumbPath, $thumbUrl, $params );
+				}
+			} elseif ( $this->repo && $thumb->hasFile() && !$thumb->fileIsSource() ) {
+				$backend = $this->repo->getBackend();
+				// Copy the thumbnail from the file system into storage. This avoids using
+				// FileRepo::store(); getThumbPath() uses a different zone in some subclasses.
+				$backend->prepare( array( 'dir' => dirname( $thumbPath ) ) );
+				$status = $backend->store(
+					array( 'src' => $tmpThumbPath, 'dst' => $thumbPath, 'overwrite' => 1 ),
+					array( 'force' => 1, 'nonLocking' => 1, 'allowStale' => 1 )
+				);
+				if ( $status->isOK() ) {
+					$thumb->setStoragePath( $thumbPath );
+				} else {
+					$thumb = $this->transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags );
+				}
+			}
+
+			// Purge. Useful in the event of Core -> Squid connection failure or squid
+			// purge collisions from elsewhere during failure. Don't keep triggering for
+			// "thumbs" which have the main image URL though (bug 13776)
+			if ( $wgUseSquid ) {
+				if ( !$thumb || $thumb->isError() || $thumb->getUrl() != $this->getURL() ) {
+					SquidUpdate::purge( array( $thumbUrl ) );
+				}
+			}
+		} while ( false );
+
+		wfProfileOut( __METHOD__ );
+		return is_object( $thumb ) ? $thumb : false;
+	}
+
+	/**
+	 * Hook into transform() to allow migration of thumbnail files
+	 * STUB
+	 * Overridden by LocalFile
+	 */
+	function migrateThumbFile( $thumbName ) {}
+
+	/**
+	 * Get a MediaHandler instance for this file
+	 *
+	 * @return MediaHandler
+	 */
+	function getHandler() {
+		if ( !isset( $this->handler ) ) {
+			$this->handler = MediaHandler::getHandler( $this->getMimeType() );
+		}
+		return $this->handler;
+	}
+
+	/**
+	 * Get a ThumbnailImage representing a file type icon
+	 *
+	 * @return ThumbnailImage
+	 */
+	function iconThumb() {
+		global $wgStylePath, $wgStyleDirectory;
+
+		$try = array( 'fileicon-' . $this->getExtension() . '.png', 'fileicon.png' );
+		foreach ( $try as $icon ) {
+			$path = '/common/images/icons/' . $icon;
+			$filepath = $wgStyleDirectory . $path;
+			if ( file_exists( $filepath ) ) { // always FS
+				return new ThumbnailImage( $this, $wgStylePath . $path, 120, 120 );
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Get last thumbnailing error.
+	 * Largely obsolete.
+	 */
+	function getLastError() {
+		return $this->lastError;
+	}
+
+	/**
+	 * Get all thumbnail names previously generated for this file
+	 * STUB
+	 * Overridden by LocalFile
+	 */
+	function getThumbnails() {
+		return array();
+	}
+
+	/**
+	 * Purge shared caches such as thumbnails and DB data caching
+	 * STUB
+	 * Overridden by LocalFile
+	 * @param $options Array Options, which include:
+	 *     'forThumbRefresh' : The purging is only to refresh thumbnails
+	 */
+	function purgeCache( $options = array() ) {}
+
+	/**
+	 * Purge the file description page, but don't go after
+	 * pages using the file. Use when modifying file history
+	 * but not the current data.
+	 */
+	function purgeDescription() {
+		$title = $this->getTitle();
+		if ( $title ) {
+			$title->invalidateCache();
+			$title->purgeSquid();
+		}
+	}
+
+	/**
+	 * Purge metadata and all affected pages when the file is created,
+	 * deleted, or majorly updated.
+	 */
+	function purgeEverything() {
+		// Delete thumbnails and refresh file metadata cache
+		$this->purgeCache();
+		$this->purgeDescription();
+
+		// Purge cache of all pages using this file
+		$title = $this->getTitle();
+		if ( $title ) {
+			$update = new HTMLCacheUpdate( $title, 'imagelinks' );
+			$update->doUpdate();
+		}
+	}
+
+	/**
+	 * Return a fragment of the history of file.
+	 *
+	 * STUB
+	 * @param $limit integer Limit of rows to return
+	 * @param $start timestamp Only revisions older than $start will be returned
+	 * @param $end timestamp Only revisions newer than $end will be returned
+	 * @param $inc bool Include the endpoints of the time range
+	 *
+	 * @return array
+	 */
+	function getHistory($limit = null, $start = null, $end = null, $inc=true) {
+		return array();
+	}
+
+	/**
+	 * Return the history of this file, line by line. Starts with current version,
+	 * then old versions. Should return an object similar to an image/oldimage
+	 * database row.
+	 *
+	 * STUB
+	 * Overridden in LocalFile
+	 */
+	public function nextHistoryLine() {
+		return false;
+	}
+
+	/**
+	 * Reset the history pointer to the first element of the history.
+	 * Always call this function after using nextHistoryLine() to free db resources
+	 * STUB
+	 * Overridden in LocalFile.
+	 */
+	public function resetHistory() {}
+
+	/**
+	 * Get the filename hash component of the directory including trailing slash,
+	 * e.g. f/fa/
+	 * If the repository is not hashed, returns an empty string.
+	 *
+	 * @return string
+	 */
+	function getHashPath() {
+		if ( !isset( $this->hashPath ) ) {
+			$this->assertRepoDefined();
+			$this->hashPath = $this->repo->getHashPath( $this->getName() );
+		}
+		return $this->hashPath;
+	}
+
+	/**
+	 * Get the path of the file relative to the public zone root.
+	 * This function is overriden in OldLocalFile to be like getArchiveRel().
+	 *
+	 * @return string
+	 */
+	function getRel() {
+		return $this->getHashPath() . $this->getName();
+	}
+
+	/**
+	 * Get the path of an archived file relative to the public zone root
+	 *
+	 * @param $suffix bool|string if not false, the name of an archived thumbnail file
+	 *
+	 * @return string
+	 */
+	function getArchiveRel( $suffix = false ) {
+		$path = 'archive/' . $this->getHashPath();
+		if ( $suffix === false ) {
+			$path = substr( $path, 0, -1 );
+		} else {
+			$path .= $suffix;
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the path, relative to the thumbnail zone root, of the
+	 * thumbnail directory or a particular file if $suffix is specified
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getThumbRel( $suffix = false ) {
+		$path = $this->getRel();
+		if ( $suffix !== false ) {
+			$path .= '/' . $suffix;
+		}
+		return $path;
+	}
+
+	/**
+	 * Get urlencoded path of the file relative to the public zone root.
+	 * This function is overriden in OldLocalFile to be like getArchiveUrl().
+	 *
+	 * @return string
+	 */
+	function getUrlRel() {
+		return $this->getHashPath() . rawurlencode( $this->getName() );
+	}
+
+	/**
+	 * Get the path, relative to the thumbnail zone root, for an archived file's thumbs directory
+	 * or a specific thumb if the $suffix is given.
+	 *
+	 * @param $archiveName string the timestamped name of an archived image
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getArchiveThumbRel( $archiveName, $suffix = false ) {
+		$path = 'archive/' . $this->getHashPath() . $archiveName . "/";
+		if ( $suffix === false ) {
+			$path = substr( $path, 0, -1 );
+		} else {
+			$path .= $suffix;
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the path of the archived file.
+	 *
+	 * @param $suffix bool|string if not false, the name of an archived file.
+	 *
+	 * @return string
+	 */
+	function getArchivePath( $suffix = false ) {
+		$this->assertRepoDefined();
+		return $this->repo->getZonePath( 'public' ) . '/' . $this->getArchiveRel( $suffix );
+	}
+
+	/**
+	 * Get the path of an archived file's thumbs, or a particular thumb if $suffix is specified
+	 *
+	 * @param $archiveName string the timestamped name of an archived image
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getArchiveThumbPath( $archiveName, $suffix = false ) {
+		$this->assertRepoDefined();
+		return $this->repo->getZonePath( 'thumb' ) . '/' .
+			$this->getArchiveThumbRel( $archiveName, $suffix );
+	}
+
+	/**
+	 * Get the path of the thumbnail directory, or a particular file if $suffix is specified
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getThumbPath( $suffix = false ) {
+		$this->assertRepoDefined();
+		return $this->repo->getZonePath( 'thumb' ) . '/' . $this->getThumbRel( $suffix );
+	}
+
+	/**
+	 * Get the URL of the archive directory, or a particular file if $suffix is specified
+	 *
+	 * @param $suffix bool|string if not false, the name of an archived file
+	 *
+	 * @return string
+	 */
+	function getArchiveUrl( $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getZoneUrl( 'public' ) . '/archive/' . $this->getHashPath();
+		if ( $suffix === false ) {
+			$path = substr( $path, 0, -1 );
+		} else {
+			$path .= rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the URL of the archived file's thumbs, or a particular thumb if $suffix is specified
+	 *
+	 * @param $archiveName string the timestamped name of an archived image
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getArchiveThumbUrl( $archiveName, $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getZoneUrl( 'thumb' ) . '/archive/' .
+			$this->getHashPath() . rawurlencode( $archiveName ) . "/";
+		if ( $suffix === false ) {
+			$path = substr( $path, 0, -1 );
+		} else {
+			$path .= rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the URL of the thumbnail directory, or a particular file if $suffix is specified
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return path
+	 */
+	function getThumbUrl( $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getZoneUrl( 'thumb' ) . '/' . $this->getUrlRel();
+		if ( $suffix !== false ) {
+			$path .= '/' . rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the public zone virtual URL for a current version source file
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getVirtualUrl( $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getVirtualUrl() . '/public/' . $this->getUrlRel();
+		if ( $suffix !== false ) {
+			$path .= '/' . rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the public zone virtual URL for an archived version source file
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getArchiveVirtualUrl( $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getVirtualUrl() . '/public/archive/' . $this->getHashPath();
+		if ( $suffix === false ) {
+			$path = substr( $path, 0, -1 );
+		} else {
+			$path .= rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * Get the virtual URL for a thumbnail file or directory
+	 *
+	 * @param $suffix bool|string if not false, the name of a thumbnail file
+	 *
+	 * @return string
+	 */
+	function getThumbVirtualUrl( $suffix = false ) {
+		$this->assertRepoDefined();
+		$path = $this->repo->getVirtualUrl() . '/thumb/' . $this->getUrlRel();
+		if ( $suffix !== false ) {
+			$path .= '/' . rawurlencode( $suffix );
+		}
+		return $path;
+	}
+
+	/**
+	 * @return bool
+	 */
+	function isHashed() {
+		$this->assertRepoDefined();
+		return $this->repo->isHashed();
+	}
+
+	/**
+	 * @throws MWException
+	 */
+	function readOnlyError() {
+		throw new MWException( get_class($this) . ': write operations are not supported' );
+	}
+
+	/**
+	 * Record a file upload in the upload log and the image table
+	 * STUB
+	 * Overridden by LocalFile
+	 * @param $oldver
+	 * @param $desc
+	 * @param $license string
+	 * @param $copyStatus string
+	 * @param $source string
+	 * @param $watch bool
+	 */
+	function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '', $watch = false ) {
+		$this->readOnlyError();
+	}
+
+	/**
+	 * Move or copy a file to its public location. If a file exists at the
+	 * destination, move it to an archive. Returns a FileRepoStatus object with
+	 * the archive name in the "value" member on success.
+	 *
+	 * The archive name should be passed through to recordUpload for database
+	 * registration.
+	 *
+	 * @param $srcPath String: local filesystem path to the source image
+	 * @param $flags Integer: a bitwise combination of:
+	 *     File::DELETE_SOURCE    Delete the source file, i.e. move
+	 *         rather than copy
+	 * @return FileRepoStatus object. On success, the value member contains the
+	 *     archive name, or an empty string if it was a new file.
+	 *
+	 * STUB
+	 * Overridden by LocalFile
+	 */
+	function publish( $srcPath, $flags = 0 ) {
+		$this->readOnlyError();
+	}
+
+	/**
+	 * @return bool
+	 */
+	function formatMetadata() {
+		if ( !$this->getHandler() ) {
+			return false;
+		}
+		return $this->getHandler()->formatMetadata( $this, $this->getMetadata() );
+	}
+
+	/**
+	 * Returns true if the file comes from the local file repository.
+	 *
+	 * @return bool
+	 */
+	function isLocal() {
+		return $this->repo && $this->repo->isLocal();
+	}
+
+	/**
+	 * Returns the name of the repository.
+	 *
+	 * @return string
+	 */
+	function getRepoName() {
+		return $this->repo ? $this->repo->getName() : 'unknown';
+	}
+
+	/**
+	 * Returns the repository
+	 *
+	 * @return FileRepo|false
+	 */
+	function getRepo() {
+		return $this->repo;
+	}
+
+	/**
+	 * Returns true if the image is an old version
+	 * STUB
+	 *
+	 * @return bool
+	 */
+	function isOld() {
+		return false;
+	}
+
+	/**
+	 * Is this file a "deleted" file in a private archive?
+	 * STUB
+	 *
+	 * @param $field
+	 *
+	 * @return bool
+	 */
+	function isDeleted( $field ) {
+		return false;
+	}
+
+	/**
+	 * Return the deletion bitfield
+	 * STUB
+	 */
+	function getVisibility() {
+		return 0;
+	}
+
+	/**
+	 * Was this file ever deleted from the wiki?
+	 *
+	 * @return bool
+	 */
+	function wasDeleted() {
+		$title = $this->getTitle();
+		return $title && $title->isDeletedQuick();
+	}
+
+	/**
+	 * Move file to the new title
+	 *
+	 * Move current, old version and all thumbnails
+	 * to the new filename. Old file is deleted.
+	 *
+	 * Cache purging is done; checks for validity
+	 * and logging are caller's responsibility
+	 *
+	 * @param $target Title New file name
+	 * @return FileRepoStatus object.
+	 */
+	 function move( $target ) {
+		$this->readOnlyError();
+	 }
+
+	/**
+	 * Delete all versions of the file.
+	 *
+	 * Moves the files into an archive directory (or deletes them)
+	 * and removes the database rows.
+	 *
+	 * Cache purging is done; logging is caller's responsibility.
+	 *
+	 * @param $reason String
+	 * @param $suppress Boolean: hide content from sysops?
+	 * @return true on success, false on some kind of failure
+	 * STUB
+	 * Overridden by LocalFile
+	 */
+	function delete( $reason, $suppress = false ) {
+		$this->readOnlyError();
+	}
+
+	/**
+	 * Restore all or specified deleted revisions to the given file.
+	 * Permissions and logging are left to the caller.
+	 *
+	 * May throw database exceptions on error.
+	 *
+	 * @param $versions array set of record ids of deleted items to restore,
+	 *                    or empty to restore all revisions.
+	 * @param $unsuppress bool remove restrictions on content upon restoration?
+	 * @return int|false the number of file revisions restored if successful,
+	 *         or false on failure
+	 * STUB
+	 * Overridden by LocalFile
+	 */
+	function restore( $versions = array(), $unsuppress = false ) {
+		$this->readOnlyError();
+	}
+
+	/**
+	 * Returns 'true' if this file is a type which supports multiple pages,
+	 * e.g. DJVU or PDF. Note that this may be true even if the file in
+	 * question only has a single page.
+	 *
+	 * @return Bool
+	 */
+	function isMultipage() {
+		return $this->getHandler() && $this->handler->isMultiPage( $this );
+	}
+
+	/**
+	 * Returns the number of pages of a multipage document, or false for
+	 * documents which aren't multipage documents
+	 *
+	 * @return false|int
+	 */
+	function pageCount() {
+		if ( !isset( $this->pageCount ) ) {
+			if ( $this->getHandler() && $this->handler->isMultiPage( $this ) ) {
+				$this->pageCount = $this->handler->pageCount( $this );
+			} else {
+				$this->pageCount = false;
+			}
+		}
+		return $this->pageCount;
+	}
+
+	/**
+	 * Calculate the height of a thumbnail using the source and destination width
+	 *
+	 * @param $srcWidth
+	 * @param $srcHeight
+	 * @param $dstWidth
+	 *
+	 * @return int
+	 */
+	static function scaleHeight( $srcWidth, $srcHeight, $dstWidth ) {
+		// Exact integer multiply followed by division
+		if ( $srcWidth == 0 ) {
+			return 0;
+		} else {
+			return round( $srcHeight * $dstWidth / $srcWidth );
+		}
+	}
+
+	/**
+	 * Get an image size array like that returned by getImageSize(), or false if it
+	 * can't be determined.
+	 *
+	 * @param $fileName String: The filename
+	 * @return Array
+	 */
+	function getImageSize( $fileName ) {
+		if ( !$this->getHandler() ) {
+			return false;
+		}
+		return $this->handler->getImageSize( $this, $fileName );
+	}
+
+	/**
+	 * Get the URL of the image description page. May return false if it is
+	 * unknown or not applicable.
+	 *
+	 * @return string
+	 */
+	function getDescriptionUrl() {
+		if ( $this->repo ) {
+			return $this->repo->getDescriptionUrl( $this->getName() );
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Get the HTML text of the description page, if available
+	 *
+	 * @return string
+	 */
+	function getDescriptionText() {
+		global $wgMemc, $wgLang;
+		if ( !$this->repo || !$this->repo->fetchDescription ) {
+			return false;
+		}
+		$renderUrl = $this->repo->getDescriptionRenderUrl( $this->getName(), $wgLang->getCode() );
+		if ( $renderUrl ) {
+			if ( $this->repo->descriptionCacheExpiry > 0 ) {
+				wfDebug("Attempting to get the description from cache...");
+				$key = $this->repo->getLocalCacheKey( 'RemoteFileDescription', 'url', $wgLang->getCode(),
+									$this->getName() );
+				$obj = $wgMemc->get($key);
+				if ($obj) {
+					wfDebug("success!\n");
+					return $obj;
+				}
+				wfDebug("miss\n");
+			}
+			wfDebug( "Fetching shared description from $renderUrl\n" );
+			$res = Http::get( $renderUrl );
+			if ( $res && $this->repo->descriptionCacheExpiry > 0 ) {
+				$wgMemc->set( $key, $res, $this->repo->descriptionCacheExpiry );
+			}
+			return $res;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Get discription of file revision
+	 * STUB
+	 *
+	 * @return string
+	 */
+	function getDescription() {
+		return null;
+	}
+
+	/**
+	 * Get the 14-character timestamp of the file upload
+	 *
+	 * @return string|false TS_MW timestamp or false on failure
+	 */
+	function getTimestamp() {
+		$this->assertRepoDefined();
+		return $this->repo->getFileTimestamp( $this->getPath() );
+	}
+
+	/**
+	 * Get the SHA-1 base 36 hash of the file
+	 *
+	 * @return string
+	 */
+	function getSha1() {
+		$this->assertRepoDefined();
+		return $this->repo->getFileSha1( $this->getPath() );
+	}
+
+	/**
+	 * Get the deletion archive key, <sha1>.<ext>
+	 *
+	 * @return string
+	 */
+	function getStorageKey() {
+		$hash = $this->getSha1();
+		if ( !$hash ) {
+			return false;
+		}
+		$ext = $this->getExtension();
+		$dotExt = $ext === '' ? '' : ".$ext";
+		return $hash . $dotExt;
+	}
+
+	/**
+	 * Determine if the current user is allowed to view a particular
+	 * field of this file, if it's marked as deleted.
+	 * STUB
+	 * @param $field Integer
+	 * @param $user User object to check, or null to use $wgUser
+	 * @return Boolean
+	 */
+	function userCan( $field, User $user = null ) {
+		return true;
+	}
+
+	/**
+	 * Get an associative array containing information about a file in the local filesystem.
+	 *
+	 * @param $path String: absolute local filesystem path
+	 * @param $ext Mixed: the file extension, or true to extract it from the filename.
+	 *             Set it to false to ignore the extension.
+	 *
+	 * @return array
+	 */
+	static function getPropsFromPath( $path, $ext = true ) {
+		wfDebug( __METHOD__.": Getting file info for $path\n" );
+		wfDeprecated( __METHOD__, '1.19' );
+
+		$fsFile = new FSFile( $path );
+		return $fsFile->getProps();
+	}
+
+	/**
+	 * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case
+	 * encoding, zero padded to 31 digits.
+	 *
+	 * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36
+	 * fairly neatly.
+	 *
+	 * @param $path string
+	 *
+	 * @return false|string False on failure
+	 */
+	static function sha1Base36( $path ) {
+		wfDeprecated( __METHOD__, '1.19' );
+
+		$fsFile = new FSFile( $path );
+		return $fsFile->getSha1Base36();
+	}
+
+	/**
+	 * @return string
+	 */
+	function getLongDesc() {
+		$handler = $this->getHandler();
+		if ( $handler ) {
+			return $handler->getLongDesc( $this );
+		} else {
+			return MediaHandler::getGeneralLongDesc( $this );
+		}
+	}
+
+	/**
+	 * @return string
+	 */
+	function getShortDesc() {
+		$handler = $this->getHandler();
+		if ( $handler ) {
+			return $handler->getShortDesc( $this );
+		} else {
+			return MediaHandler::getGeneralShortDesc( $this );
+		}
+	}
+
+	/**
+	 * @return string
+	 */
+	function getDimensionsString() {
+		$handler = $this->getHandler();
+		if ( $handler ) {
+			return $handler->getDimensionsString( $this );
+		} else {
+			return '';
+		}
+	}
+
+	/**
+	 * @return
+	 */
+	function getRedirected() {
+		return $this->redirected;
+	}
+
+	/**
+	 * @return Title
+	 */
+	function getRedirectedTitle() {
+		if ( $this->redirected ) {
+			if ( !$this->redirectTitle ) {
+				$this->redirectTitle = Title::makeTitle( NS_FILE, $this->redirected );
+			}
+			return $this->redirectTitle;
+		}
+	}
+
+	/**
+	 * @param  $from
+	 * @return void
+	 */
+	function redirectedFrom( $from ) {
+		$this->redirected = $from;
+	}
+
+	/**
+	 * @return bool
+	 */
+	function isMissing() {
+		return false;
+	}
+
+	/**
+	 * Assert that $this->repo is set to a valid FileRepo instance
+	 * @throws MWException
+	 */
+	protected function assertRepoDefined() {
+		if ( !( $this->repo instanceof $this->repoClass ) ) {
+			throw new MWException( "A {$this->repoClass} object is not set for this File.\n" );
+		}
+	}
+
+	/**
+	 * Assert that $this->title is set to a Title
+	 * @throws MWException
+	 */
+	protected function assertTitleDefined() {
+		if ( !( $this->title instanceof Title ) ) {
+			throw new MWException( "A Title object is not set for this File.\n" );
+		}
+	}
+}