Base media handler class. More...

Inheritance diagram for MediaHandler:

[legend]

Public Member Functions
	canAnimateThumbnail ( $file)
	If the material is animated, we can animate the thumbnail. More...

	canRender ( $file)
	True if the handled types can be transformed. More...

	convertMetadataVersion ( $metadata, $version=1)
	Convert metadata version. More...

	doTransform ( $image, $dstPath, $dstUrl, $params, $flags=0)
	Get a MediaTransformOutput object representing the transformed output. More...

	filterThumbnailPurgeList (&$files, $options)
	Remove files from the purge list. More...

	formatMetadata ( $image)
	Get an array structure that looks like this: More...

	formatMetadataHelper ( $metadataArray)
	sorts the visible/invisible field. More...

	getAvailableLanguages (File $file)
	Get list of languages file can be viewed in. More...

	getCommonMetaArray (File $file)
	Get an array of standard (FormatMetadata type) metadata values. More...

	getDefaultRenderLanguage (File $file)
	On file types that support renderings in multiple languages, which language is used by default if unspecified. More...

	getDimensionsString ( $file)
	Shown in file history box on image description page. More...

	getEntireText (File $file)
	Get the text of the entire document. More...

	getImageSize ( $image, $path)
	Get an image size array like that returned by getimagesize(), or false if it can't be determined. More...

	getLength ( $file)
	If its an audio file, return the length of the file. More...

	getLongDesc ( $file)
	Short description. More...

	getMetadata ( $image, $path)
	Get handler-specific metadata which will be saved in the img_metadata field. More...

	getMetadataType ( $image)
	Get a string describing the type of metadata, for display purposes. More...

	getPageDimensions ( $image, $page)
	Get an associative array of page dimensions Currently "width" and "height" are understood, but this might be expanded in the future. More...

	getPageText ( $image, $page)
	Generic getter for text layer. More...

	getParamMap ()
	Get an associative array mapping magic word IDs to parameter names. More...

	getRotation ( $file)
	On supporting image formats, try to read out the low-level orientation of the file and return the angle that the file needs to be rotated to be viewed. More...

	getScriptedTransform ( $image, $script, $params)
	Get a MediaTransformOutput object representing an alternate of the transformed output which will call an intermediary thumbnail assist script. More...

	getShortDesc ( $file)
	Used instead of getLongDesc if there is no handler registered for file. More...

	getStreamHeaders ( $metadata)
	Get useful response headers for GET/HEAD requests for a file with the given metadata. More...

	getThumbType ( $ext, $mime, $params=null)
	Get the thumbnail extension and MIME type for a given source MIME type. More...

	getTransform ( $image, $dstPath, $dstUrl, $params)
	Get a MediaTransformOutput object representing the transformed output. More...

	isAnimatedImage ( $file)
	The material is an image, and is animated. More...

	isEnabled ()
	False if the handler is disabled for all files. More...

	isMetadataValid ( $image, $metadata)
	Check if the metadata string is valid for this handler. More...

	isMultiPage ( $file)
	True if the type has multi-page capabilities. More...

	isVectorized ( $file)
	The material is vectorized and thus scaling is lossless. More...

	makeParamString ( $params)
	Merge a parameter array into a string appropriate for inclusion in filenames. More...

	mustRender ( $file)
	True if handled types cannot be displayed directly in a browser but can be rendered. More...

	normaliseParams ( $image, &$params)
	Changes the parameter array as necessary, ready for transformation. More...

	pageCount ( $file)
	Page count for a multi-page document, false if unsupported or unknown. More...

	parseParamString ( $str)
	Parse a param string made with makeParamString back into an array. More...

	parserTransformHook ( $parser, $file)
	Modify the parser object post-transform. More...

	removeBadFile ( $dstPath, $retval=0)
	Check for zero-sized thumbnails. More...

	validateParam ( $name, $value)
	Validate a thumbnail parameter at parse time. More...

	verifyUpload ( $fileName)
	File validation hook called on upload. More...

Static Public Member Functions
static	canRotate ()

static	fitBoxWidth ( $boxWidth, $boxHeight, $maxHeight)
	Calculate the largest thumbnail width for a given original file size such that the thumbnail's height is at most $maxHeight. More...

static	getGeneralLongDesc ( $file)
	Used instead of getShortDesc if there is no handler registered for file. More...

static	getGeneralShortDesc ( $file)
	Long description. More...

static	getHandler ( $type)
	Get a MediaHandler for a given MIME type from the instance cache. More...

static	getMetadataVersion ()
	Get metadata version. More...

Public Attributes
const	MAX_ERR_LOG_SIZE = 65535
	Max length of error logged by logErrorForExternalProcess() More...

const	METADATA_BAD = false

const	METADATA_COMPATIBLE = 2

const	METADATA_GOOD = true

const	TRANSFORM_LATER = 1

Protected Member Functions
	logErrorForExternalProcess ( $retval, $err, $cmd)
	Log an error that occurred in an external process. More...

	visibleMetadataFields ()
	Get a list of metadata items which should be displayed when the metadata table is collapsed. More...

Static Protected Member Functions
static	addMeta (&$array, $visibility, $type, $id, $value, $param=false)
	This is used to generate an array element for each metadata value That array is then used to generate the table of metadata values on the image page. More...

Static Protected Attributes
static	$handlers = array()

Detailed Description

Base media handler class.

Definition at line 29 of file MediaHandler.php.

Member Function Documentation

◆ addMeta()

static MediaHandler::addMeta	(	&	$array,
			$visibility,
			$type,
			$id,
			$value,
			$param = `false`
	)

staticprotected

This is used to generate an array element for each metadata value That array is then used to generate the table of metadata values on the image page.

Parameters

array	&$array	An array containing elements for each type of visibility and each of those elements being an array of metadata items. This function adds a value to that array.
string	$visibility	('visible' or 'collapsed') if this value is hidden by default.
string	$type	Type of metadata tag (currently always 'exif')
string	$id	The name of the metadata tag (like 'artist' for example). its name in the table displayed is the message "$type-$id" (Ex exif-artist ).
string	$value	Thingy goes into a wikitext table; it used to be escaped but that was incompatible with previous practise of customized display with wikitext formatting via messages such as 'exif-model-value'. So the escaping is taken back out, but generally this seems a confusing interface.
bool \| string	$param	Value to pass to the message for the name of the field as $1. Currently this parameter doesn't seem to ever be used.

Note, everything here is passed through the parser later on (!)

Definition at line 555 of file MediaHandler.php.

References $name, $value, array(), wfDebug(), wfEscapeWikiText(), and wfMessage().

Referenced by SvgHandler\formatMetadata(), and formatMetadataHelper().

◆ canAnimateThumbnail()

MediaHandler::canAnimateThumbnail ( $file )

If the material is animated, we can animate the thumbnail.

Since: 1.20

Parameters

File $file

Returns: bool If material is not animated, handler may return any value.

Reimplemented in PNGHandler, and GIFHandler.

Definition at line 384 of file MediaHandler.php.

Referenced by File\canAnimateThumbIfAppropriate().

◆ canRender()

MediaHandler::canRender ( $file )

True if the handled types can be transformed.

Parameters

File $file

Returns: bool

Reimplemented in TiffHandler, and ImageHandler.

Definition at line 320 of file MediaHandler.php.

◆ canRotate()

static MediaHandler::canRotate ( )

static

Reimplemented in BitmapHandler.

Definition at line 733 of file MediaHandler.php.

◆ convertMetadataVersion()

MediaHandler::convertMetadataVersion	(	$metadata,
		$version = `1`
	)

Convert metadata version.

By default just returns $metadata, but can be used to allow media handlers to convert between metadata versions.

Parameters

string \| array	$metadata	Metadata array (serialized if string)
int	$version	Target version

Returns: array Serialized metadata in specified version, or $metadata on fail.

Reimplemented in ExifBitmapHandler.

Definition at line 162 of file MediaHandler.php.

References $ret, wfRestoreWarnings(), and wfSuppressWarnings().

Referenced by File\convertMetadataVersion().

◆ doTransform()

MediaHandler::doTransform	(	$image,
		$dstPath,
		$dstUrl,
		$params,
		$flags = `0`
	)

abstract

Get a MediaTransformOutput object representing the transformed output.

Does the transform unless $flags contains self::TRANSFORM_LATER.

Parameters

File	$image	The image object
string	$dstPath	Filesystem destination path
string	$dstUrl	Destination URL to use in output HTML
array	$params	Arbitrary set of parameters validated by $this->validateParam() Note: These parameters have not gone through $this->normaliseParams()
int	$flags	A bitfield, may contain self::TRANSFORM_LATER

Returns: MediaTransformOutput

Reimplemented in SvgHandler, DjVuHandler, BitmapHandler, BitmapHandler_ClientOnly, MockBitmapHandler, and MockSvgHandler.

Referenced by getTransform(), and File\transform().

◆ filterThumbnailPurgeList()

MediaHandler::filterThumbnailPurgeList	(	&	$files,
			$options
	)

Remove files from the purge list.

This is used by some video handlers to prevent ?action=purge from removing a transcoded video, which is expensive to regenerate.

See also: LocalFile::purgeThumbnails

Parameters

array	$files
array	$options	Purge options. Currently will always be an array with a single key 'forThumbRefresh' set to true.

Definition at line 724 of file MediaHandler.php.

Referenced by ForeignAPIFile\purgeThumbnails(), and LocalFile\purgeThumbnails().

◆ fitBoxWidth()

static MediaHandler::fitBoxWidth	(	$boxWidth,
		$boxHeight,
		$maxHeight
	)

static

Calculate the largest thumbnail width for a given original file size such that the thumbnail's height is at most $maxHeight.

Parameters

int	$boxWidth	Width of the thumbnail box.
int	$boxHeight	Height of the thumbnail box.
int	$maxHeight	Maximum height expected for the thumbnail.

Returns: int

Definition at line 633 of file MediaHandler.php.

Referenced by ImageHandler\normaliseParams(), and MediaHandlerTest\testFitBoxWidth().

◆ formatMetadata()

MediaHandler::formatMetadata ( $image )

Get an array structure that looks like this:

array( 'visible' => array( 'Human-readable name' => 'Human readable value', ... ), 'collapsed' => array( 'Human-readable name' => 'Human readable value', ... ) ) The UI will format this into a table where the visible fields are always visible, and the collapsed fields are optionally visible.

The function should return false if there is no metadata to display.

Todo:: FIXME: This interface is not very flexible.

The media handler should generate HTML instead. It can do all the formatting according to some standard. That makes it possible to do things like visual indication of grouped and chained streams in ogg container files.

Parameters

File $image

Returns: array|bool

Reimplemented in ExifBitmapHandler, PNGHandler, GIFHandler, and SvgHandler.

Definition at line 487 of file MediaHandler.php.

◆ formatMetadataHelper()

MediaHandler::formatMetadataHelper ( $metadataArray )

sorts the visible/invisible field.

Split off from ImageHandler::formatMetadata, as used by more than one type of handler.

This is used by the media handlers that use the FormatMetadata class

Parameters

array $metadataArray Metadata array

Returns: array for use displaying metadata.

Definition at line 500 of file MediaHandler.php.

References $name, $value, addMeta(), array(), as, FormatMetadata\getFormattedData(), and visibleMetadataFields().

Referenced by GIFHandler\formatMetadata(), PNGHandler\formatMetadata(), and ExifBitmapHandler\formatMetadata().

◆ getAvailableLanguages()

MediaHandler::getAvailableLanguages ( File $file )

Get list of languages file can be viewed in.

Parameters

File $file

Returns: Array Array of language codes, or empty array if unsupported.

Since: 1.23

Reimplemented in SvgHandler.

Definition at line 782 of file MediaHandler.php.

References array().

Referenced by File\getAvailableLanguages().

◆ getCommonMetaArray()

MediaHandler::getCommonMetaArray ( File $file )

Get an array of standard (FormatMetadata type) metadata values.

The returned data is largely the same as that from getMetadata(), but formatted in a standard, stable, handler-independent way. The idea being that some values like ImageDescription or Artist are universal and should be retrievable in a handler generic way.

The specific properties are the type of properties that can be handled by the FormatMetadata class. These values are exposed to the user via the filemetadata parser function.

Details of the response format of this function can be found at https://www.mediawiki.org/wiki/Manual:File_metadata_handling tl/dr: the response is an associative array of properties keyed by name, but the value can be complex. You probably want to call one of the FormatMetadata::flatten* functions on the property values before using them, or call FormatMetadata::getFormattedData() on the full response array, which transforms all values into prettified, human-readable text.

Subclasses overriding this function must return a value which is a valid API response fragment (all associative array keys are valid XML tagnames).

Note, if the file simply has no metadata, but the handler supports this interface, it should return an empty array, not false.

Parameters

File $file

Returns: array|bool False if interface not supported

Since: 1.23

Reimplemented in PNGHandler, GIFHandler, SvgHandler, and ExifBitmapHandler.

Definition at line 232 of file MediaHandler.php.

Referenced by File\getCommonMetaArray().

◆ getDefaultRenderLanguage()

MediaHandler::getDefaultRenderLanguage ( File $file )

On file types that support renderings in multiple languages, which language is used by default if unspecified.

If getAvailableLanguages returns a non-empty array, this must return a valid language code. Otherwise can return null if files of this type do not support alternative language renderings.

Parameters

File $file

Returns: String language code or null if multi-language not supported for filetype.

Since: 1.23

Reimplemented in SvgHandler.

Definition at line 798 of file MediaHandler.php.

Referenced by File\getDefaultRenderLanguage().

◆ getDimensionsString()

MediaHandler::getDimensionsString ( $file )

Shown in file history box on image description page.

Parameters

File $file

Returns: String Dimensions

Reimplemented in ImageHandler.

Definition at line 649 of file MediaHandler.php.

Referenced by File\getDimensionsString().

◆ getEntireText()

MediaHandler::getEntireText ( File $file )

Get the text of the entire document.

Parameters

File $file

Returns: bool|string The text of the document or false if unsupported.

Definition at line 441 of file MediaHandler.php.

References $file, and getPageText().

◆ getGeneralLongDesc()

static MediaHandler::getGeneralLongDesc ( $file )

static

Used instead of getShortDesc if there is no handler registered for file.

Parameters

File $file

Returns: string

Definition at line 618 of file MediaHandler.php.

References $file, $wgLang, global, and wfMessage().

Referenced by File\getLongDesc().

◆ getGeneralShortDesc()

static MediaHandler::getGeneralShortDesc ( $file )

static

Long description.

Shown under image on image description page surounded by ().

Parameters

File $file

Returns: string

Definition at line 606 of file MediaHandler.php.

References $file, $wgLang, and global.

Referenced by File\getShortDesc().

◆ getHandler()

static MediaHandler::getHandler ( $type )

static

Get a MediaHandler for a given MIME type from the instance cache.

Parameters

string $type

Returns: MediaHandler

Definition at line 48 of file MediaHandler.php.

References $type, global, isEnabled(), and wfDebug().

Referenced by ArchivedFile\getHandler(), File\getHandler(), FSFile\getProps(), LocalFile\upload(), and UploadBase\verifyFile().

◆ getImageSize()

MediaHandler::getImageSize	(	$image,
		$path
	)

abstract

Get an image size array like that returned by getimagesize(), or false if it can't be determined.

Parameters

File	$image	The image object, or false if there isn't one
string	$path	the filename

Returns: array Follow the format of PHP getimagesize() internal function. See http://www.php.net/getimagesize

Reimplemented in DjVuHandler, ImageHandler, ExifBitmapHandler, XCFHandler, and BmpHandler.

Referenced by getPageDimensions().

◆ getLength()

MediaHandler::getLength ( $file )

If its an audio file, return the length of the file.

Otherwise 0.

File::getLength() existed for a long time, but was calling a method that only existed in some subclasses of this class (The TMH ones).

Parameters

File $file

Returns: float Length in seconds

Since: 1.23

Definition at line 812 of file MediaHandler.php.

Referenced by File\getLength().

◆ getLongDesc()

MediaHandler::getLongDesc ( $file )

Short description.

Shown on Special:Search results.

Parameters

File $file

Returns: string

Reimplemented in GIFHandler, PNGHandler, SvgHandler, and ImageHandler.

Definition at line 593 of file MediaHandler.php.

References $file, $wgLang, global, and wfMessage().

Referenced by File\getLongDesc().

◆ getMetadata()

MediaHandler::getMetadata	(	$image,
		$path
	)

Get handler-specific metadata which will be saved in the img_metadata field.

Parameters

File	$image	The image object, or false if there isn't one. Warning, FSFile::getPropsFromPath might pass an (object)array() instead (!)
string	$path	The filename

Returns: string

Reimplemented in DjVuHandler, TiffHandler, PNGHandler, JpegHandler, GIFHandler, and SvgHandler.

Definition at line 126 of file MediaHandler.php.

Referenced by ExifBitmapHandler\getImageSize().

◆ getMetadataType()

MediaHandler::getMetadataType ( $image )

Get a string describing the type of metadata, for display purposes.

Parameters

File $image

Returns: string

Reimplemented in DjVuHandler, SvgHandler, ExifBitmapHandler, GIFHandler, and PNGHandler.

Definition at line 181 of file MediaHandler.php.

◆ getMetadataVersion()

static MediaHandler::getMetadataVersion ( )

static

Get metadata version.

This is not used for validating metadata, this is used for the api when returning metadata, since api content formats should stay the same over time, and so things using ForiegnApiRepo can keep backwards compatibility

All core media handlers share a common version number, and extensions can use the GetMetadataVersion hook to append to the array (they should append a unique string so not to get confusing). If there was a media handler named 'foo' with metadata version 3 it might add to the end of the array the element 'foo=3'. if the core metadata version is 2, the end version string would look like '2;foo=3'.

Returns: string Version string

Definition at line 145 of file MediaHandler.php.

References $version, array(), and wfRunHooks().

Referenced by ForeignAPIFile\newFromTitle().

◆ getPageDimensions()

MediaHandler::getPageDimensions	(	$image,
		$page
	)

Get an associative array of page dimensions Currently "width" and "height" are understood, but this might be expanded in the future.

Returns false if unknown.

It is expected that handlers for paged media (e.g. DjVuHandler) will override this method so that it gives the correct results for each specific page of the file, using the $page argument.

Note: For non-paged media, use getImageSize.

Parameters

File	$image
int	$page	What page to get dimensions of

Returns: array|bool

Reimplemented in DjVuHandler.

Definition at line 412 of file MediaHandler.php.

References array(), and getImageSize().

Referenced by LocalFile\getHeight(), and LocalFile\getWidth().

◆ getPageText()

MediaHandler::getPageText	(	$image,
		$page
	)

Generic getter for text layer.

Currently overloaded by PDF and DjVu handlers

Parameters

File	$image
int	$page	Page number to get information for

Returns: bool|string Page text or false when no text found or if unsupported.

Reimplemented in DjVuHandler.

Definition at line 432 of file MediaHandler.php.

Referenced by getEntireText().

◆ getParamMap()

MediaHandler::getParamMap ( )

abstract

Get an associative array mapping magic word IDs to parameter names.

Will be used by the parser to identify parameters.

Reimplemented in SvgHandler, DjVuHandler, and ImageHandler.

◆ getRotation()

MediaHandler::getRotation ( $file )

On supporting image formats, try to read out the low-level orientation of the file and return the angle that the file needs to be rotated to be viewed.

This information is only useful when manipulating the original file; the width and height we normally work with is logical, and will match any produced output views.

For files we don't know, we return 0.

Parameters

File $file

Returns: int 0, 90, 180 or 270

Reimplemented in ExifBitmapHandler.

Definition at line 751 of file MediaHandler.php.

Referenced by BitmapHandler\mustRender(), BitmapHandler\rotate(), BitmapHandler\transformGd(), BitmapHandler\transformImageMagick(), and BitmapHandler\transformImageMagickExt().

◆ getScriptedTransform()

MediaHandler::getScriptedTransform	(	$image,
		$script,
		$params
	)

Get a MediaTransformOutput object representing an alternate of the transformed output which will call an intermediary thumbnail assist script.

Used when the repository has a thumbnailScriptUrl option configured.

Return false to fall back to the regular getTransform().

Parameters

File	$image
string	$script
array	$params

Returns: bool|ThumbnailImage

Reimplemented in ImageHandler.

Definition at line 248 of file MediaHandler.php.

Referenced by File\transform().

◆ getShortDesc()

MediaHandler::getShortDesc ( $file )

Used instead of getLongDesc if there is no handler registered for file.

Parameters

File $file

Returns: string

Reimplemented in ImageHandler.

Definition at line 581 of file MediaHandler.php.

References $file, $wgLang, and global.

Referenced by File\getShortDesc().

◆ getStreamHeaders()

MediaHandler::getStreamHeaders ( $metadata )

Get useful response headers for GET/HEAD requests for a file with the given metadata.

Parameters

mixed $metadata Result of the getMetadata() function of this handler for a file

Returns: array

Definition at line 310 of file MediaHandler.php.

References array().

Referenced by File\getStreamHeaders(), and LocalFile\upload().

◆ getThumbType()

MediaHandler::getThumbType	(	$ext,
		$mime,
		$params = `null`
	)

Get the thumbnail extension and MIME type for a given source MIME type.

Parameters

string	$ext	Extension of original file
string	$mime	MIME type of original file
array	$params	Handler specific rendering parameters

Returns: array thumbnail extension and MIME type

Reimplemented in BmpHandler, DjVuHandler, SvgHandler, TiffHandler, and XCFHandler.

Definition at line 288 of file MediaHandler.php.

References $ext, $extensions, $mime, array(), and false.

◆ getTransform()

MediaHandler::getTransform	(	$image,
		$dstPath,
		$dstUrl,
		$params
	)

final

Get a MediaTransformOutput object representing the transformed output.

Does not actually do the transform.

Parameters

File	$image	The image object
string	$dstPath	Filesystem destination path
string	$dstUrl	Destination URL to use in output HTML
array	$params	Arbitrary set of parameters validated by $this->validateParam()

Returns: MediaTransformOutput

Definition at line 262 of file MediaHandler.php.

References $params, and doTransform().

Referenced by File\transform(), and File\transformErrorOutput().

◆ isAnimatedImage()

MediaHandler::isAnimatedImage ( $file )

The material is an image, and is animated.

In particular, video material need not return true.

Note: Before 1.20, this was a method of ImageHandler only

Parameters

File $file

Returns: bool

Reimplemented in GIFHandler, PNGHandler, and SvgHandler.

Definition at line 373 of file MediaHandler.php.

Referenced by File\canAnimateThumbIfAppropriate(), BitmapHandler\transformImageMagick(), and BitmapHandler\transformImageMagickExt().

◆ isEnabled()

MediaHandler::isEnabled ( )

False if the handler is disabled for all files.

Returns: bool

Reimplemented in SvgHandler, and DjVuHandler.

Definition at line 392 of file MediaHandler.php.

Referenced by getHandler().

◆ isMetadataValid()

MediaHandler::isMetadataValid	(	$image,
		$metadata
	)

Check if the metadata string is valid for this handler.

If it returns MediaHandler::METADATA_BAD (or false), Image will reload the metadata from the file and update the database. MediaHandler::METADATA_GOOD for if the metadata is a-ok, MediaHanlder::METADATA_COMPATIBLE if metadata is old but backwards compatible (which may or may not trigger a metadata reload).

Parameters

File	$image
array	$metadata

Returns: bool

Reimplemented in DjVuHandler, SvgHandler, GIFHandler, PNGHandler, and ExifBitmapHandler.

Definition at line 196 of file MediaHandler.php.

References METADATA_GOOD.

Referenced by LocalFile\maybeUpgradeRow().

◆ isMultiPage()

MediaHandler::isMultiPage ( $file )

True if the type has multi-page capabilities.

Parameters

File $file

Returns: bool

Reimplemented in DjVuHandler.

Definition at line 341 of file MediaHandler.php.

◆ isVectorized()

MediaHandler::isVectorized ( $file )

The material is vectorized and thus scaling is lossless.

Parameters

File $file

Returns: bool

Reimplemented in SvgHandler.

Definition at line 361 of file MediaHandler.php.

Referenced by File\isVectorized().

◆ logErrorForExternalProcess()

MediaHandler::logErrorForExternalProcess	(	$retval,
		$err,
		$cmd
	)

protected

Log an error that occurred in an external process.

Moved from BitmapHandler to MediaHandler with MediaWiki 1.23

Since: 1.23

Parameters

int	$retval
string	$err	Error reported by command. Anything longer than MediaHandler::MAX_ERR_LOG_SIZE is stripped off.
string	$cmd

Definition at line 766 of file MediaHandler.php.

References $retval, wfDebugLog(), and wfHostname().

Referenced by DjVuHandler\doTransform(), SvgHandler\rasterize(), JpegHandler\rotate(), BitmapHandler\rotate(), BitmapHandler\transformCustom(), and BitmapHandler\transformImageMagick().

◆ makeParamString()

MediaHandler::makeParamString ( $params )

abstract

Merge a parameter array into a string appropriate for inclusion in filenames.

Parameters

array $params Array of parameters that have been through normaliseParams.

Returns: string

Reimplemented in SvgHandler, DjVuHandler, and ImageHandler.

◆ mustRender()

MediaHandler::mustRender ( $file )

True if handled types cannot be displayed directly in a browser but can be rendered.

Parameters

File $file

Returns: bool

Reimplemented in BitmapHandler, TiffHandler, SvgHandler, DjVuHandler, XCFHandler, and BmpHandler.

Definition at line 331 of file MediaHandler.php.

◆ normaliseParams()

MediaHandler::normaliseParams	(		$image,
		&	$params
	)

abstract

Changes the parameter array as necessary, ready for transformation.

Should be idempotent. Returns false if the parameters are unacceptable and the transform should fail

Parameters

File	$image
array	$params

Reimplemented in SvgHandler, ImageHandler, BitmapHandler_ClientOnly, and BitmapHandler.

Referenced by File\transform().

◆ pageCount()

MediaHandler::pageCount ( $file )

Page count for a multi-page document, false if unsupported or unknown.

Parameters

File $file

Returns: bool

Reimplemented in DjVuHandler.

Definition at line 351 of file MediaHandler.php.

◆ parseParamString()

MediaHandler::parseParamString ( $str )

abstract

Parse a param string made with makeParamString back into an array.

Parameters

string $str The parameter string without file name (e.g. 122px)

Returns: array|bool Array of parameters or false on failure.

Reimplemented in SvgHandler, DjVuHandler, and ImageHandler.

◆ parserTransformHook()

MediaHandler::parserTransformHook	(	$parser,
		$file
	)

Modify the parser object post-transform.

This is often used to do $parser->addOutputHook(), in order to add some javascript to render a viewer. See TimedMediaHandler or OggHandler for an example.

Parameters

Parser	$parser
File	$file

Definition at line 663 of file MediaHandler.php.

◆ removeBadFile()

MediaHandler::removeBadFile	(	$dstPath,
		$retval = `0`
	)

Check for zero-sized thumbnails.

These can be generated when no disk space is available or some other error occurs

Parameters

string	$dstPath	The location of the suspect file
int	$retval	Return value of some shell process, file will be deleted if this is non-zero

Returns: bool True if removed, false otherwise

Definition at line 688 of file MediaHandler.php.

References $retval, and wfDebugLog().

Referenced by BitmapHandler\doTransform(), DjVuHandler\doTransform(), and SvgHandler\rasterize().

◆ validateParam()

MediaHandler::validateParam	(	$name,
		$value
	)

abstract

Validate a thumbnail parameter at parse time.

Return true to accept the parameter, and false to reject it. If you return false, the parser will do something quiet and forgiving.

Parameters

string	$name
mixed	$value

Reimplemented in SvgHandler, DjVuHandler, and ImageHandler.

◆ verifyUpload()

MediaHandler::verifyUpload ( $fileName )

File validation hook called on upload.

If the file at the given local path is not valid, or its MIME type does not match the handler class, a Status object should be returned containing relevant errors.

Parameters

string $fileName The local path to the file.

Returns: Status object

Definition at line 676 of file MediaHandler.php.

References Status\newGood().

◆ visibleMetadataFields()

MediaHandler::visibleMetadataFields ( )

protected

Get a list of metadata items which should be displayed when the metadata table is collapsed.

Returns: array of strings

Reimplemented in SvgHandler.

Definition at line 528 of file MediaHandler.php.

References FormatMetadata\getVisibleFields().

Referenced by formatMetadataHelper().

Member Data Documentation

◆ $handlers

MediaHandler::$handlers = array()

staticprotected

Definition at line 40 of file MediaHandler.php.

◆ MAX_ERR_LOG_SIZE

const MediaHandler::MAX_ERR_LOG_SIZE = 65535

Max length of error logged by logErrorForExternalProcess()

Definition at line 37 of file MediaHandler.php.

◆ METADATA_BAD

const MediaHandler::METADATA_BAD = false

Definition at line 32 of file MediaHandler.php.

Referenced by ExifBitmapHandler\isMetadataValid(), PNGHandler\isMetadataValid(), GIFHandler\isMetadataValid(), SvgHandler\isMetadataValid(), LocalFile\maybeUpgradeRow(), GIFHandlerTest\provideIsMetadataValid(), PNGHandlerTest\provideIsMetadataValid(), ExifBitmapTest\testIsInvalid(), and ExifBitmapTest\testPagedTiffHandledGracefully().

◆ METADATA_COMPATIBLE

const MediaHandler::METADATA_COMPATIBLE = 2

Definition at line 33 of file MediaHandler.php.

Referenced by ExifBitmapHandler\isMetadataValid(), PNGHandler\isMetadataValid(), GIFHandler\isMetadataValid(), SvgHandler\isMetadataValid(), LocalFile\maybeUpgradeRow(), ExifBitmapTest\testIsOldBroken(), and ExifBitmapTest\testIsOldGood().

◆ METADATA_GOOD

const MediaHandler::METADATA_GOOD = true

Definition at line 31 of file MediaHandler.php.

Referenced by ExifBitmapHandler\isMetadataValid(), PNGHandler\isMetadataValid(), GIFHandler\isMetadataValid(), isMetadataValid(), SvgHandler\isMetadataValid(), GIFHandlerTest\provideIsMetadataValid(), PNGHandlerTest\provideIsMetadataValid(), ExifBitmapTest\testGoodMetadata(), and ExifBitmapTest\testIsBrokenFile().

◆ TRANSFORM_LATER

const MediaHandler::TRANSFORM_LATER = 1

Definition at line 30 of file MediaHandler.php.

The documentation for this class was generated from the following file:

includes/media/MediaHandler.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Static Protected Attributes

Detailed Description

Member Function Documentation

◆ addMeta()

◆ canAnimateThumbnail()

◆ canRender()

◆ canRotate()

◆ convertMetadataVersion()

◆ doTransform()

◆ filterThumbnailPurgeList()

◆ fitBoxWidth()

◆ formatMetadata()

◆ formatMetadataHelper()

◆ getAvailableLanguages()

◆ getCommonMetaArray()

◆ getDefaultRenderLanguage()

◆ getDimensionsString()

◆ getEntireText()

◆ getGeneralLongDesc()

◆ getGeneralShortDesc()

◆ getHandler()

◆ getImageSize()

◆ getLength()

◆ getLongDesc()

◆ getMetadata()

◆ getMetadataType()

◆ getMetadataVersion()

◆ getPageDimensions()

◆ getPageText()

◆ getParamMap()

◆ getRotation()

◆ getScriptedTransform()

◆ getShortDesc()

◆ getStreamHeaders()

◆ getThumbType()

◆ getTransform()

◆ isAnimatedImage()

◆ isEnabled()

◆ isMetadataValid()

◆ isMultiPage()

◆ isVectorized()

◆ logErrorForExternalProcess()

◆ makeParamString()

◆ mustRender()

◆ normaliseParams()

◆ pageCount()

◆ parseParamString()

◆ parserTransformHook()

◆ removeBadFile()

◆ validateParam()

◆ verifyUpload()

◆ visibleMetadataFields()

Member Data Documentation

◆ $handlers

◆ MAX_ERR_LOG_SIZE

◆ METADATA_BAD

◆ METADATA_COMPATIBLE

◆ METADATA_GOOD

◆ TRANSFORM_LATER