Handler for SVG images. More...

Inherits ImageHandler.

Collaboration diagram for SvgHandler:

[legend]

Public Member Functions

canAnimateThumbnail ( $file)

We do not support making animated svg thumbnails.

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

formatMetadata ( $file, $context=false)

getAvailableLanguages (File $file)

Which languages (systemLanguage attribute) is supported.

getCommonMetaArray (File $file)

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

getDefaultRenderLanguage (File $file)

What language to render file in if none selected.

getLongDesc ( $file)

Subtitle for the image.

getMatchedLanguage ( $userPreferredLanguage, array $svgLanguages)

SVG's systemLanguage matching rules state: 'The systemLanguage attribute ... [e]valuates to "true" if one of the languages indicated by user preferences exactly equals one of the languages given in the value of this parameter, or if one of the languages indicated by user preferences exactly equals a prefix of one of the languages given in the value of this parameter such that the first tag character following the prefix is "-".

getMetadataType ( $image)

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

getParamMap ()

Get an associative array mapping magic word IDs to parameter names.Will be used by the parser to identify parameters.

Returns: string[]

Stability: stable: to override

Returns: string[]

getSizeAndMetadata ( $state, $filename)

getThumbType ( $ext, $mime, $params=null)

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

isAnimatedImage ( $file)

isEnabled ()

False if the handler is disabled for all files.

isFileMetadataValid ( $image)

Check if the metadata is valid for this handler.

isVectorized ( $file)

The material is vectorized and thus scaling is lossless.

makeParamString ( $params)

mustRender ( $file)

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

normaliseParams ( $image, &$params)

parseParamString ( $str)

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|false Array of parameters or false on failure.

Stability: stable: to override

rasterize ( $srcPath, $dstPath, $width, $height, $lang=false)

Transform an SVG file to PNG This function can be called outside of thumbnail contexts.

validateParam ( $name, $value)

Public Member Functions inherited from ImageHandler

canRender ( $file)

True if the handled types can be transformed.

Stability: stable: to override

Parameters

File $file

Returns: bool

getDimensionsString ( $file)

Shown in file history box on image description page.

Stability: stable: to override

Parameters

File $file

Returns: string Dimensions

getImageArea ( $image)

Function that returns the number of pixels to be thumbnailed.

getImageSize ( $image, $path)

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

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().

Stability: stable: to override

Parameters

File	$image
string	$script
array	$params

Returns: ThumbnailImage|false

getShortDesc ( $file)

Short description.Shown on Special:Search results.

Stability: stable: to override

Parameters

File $file

Returns: string

sanitizeParamsForBucketing ( $params)

Returns a normalised params array for which parameters have been cleaned up for bucketing purposes.

Stability: stable: to override

Parameters

array $params

Returns: array

Public Member Functions inherited from MediaHandler

canRotate ()

True if the handler can rotate the media.

convertMetadataVersion ( $metadata, $version=1)

Convert metadata version.

filterThumbnailPurgeList (&$files, $options)

Remove files from the purge list.

getContentHeaders ( $metadata)

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

getEntireText (File $file)

Get the text of the entire document.

getLength ( $file)

If it's an audio file, return the length of the file.

getMetadata ( $image, $path)

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

getPageDimensions (File $image, $page)

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

getPageText (File $image, $page)

Generic getter for text layer.

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.

getSizeAndMetadataWithFallback ( $file, $path)

Get the metadata array and the image size, with b/c fallback.

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

Get a MediaTransformOutput object representing the transformed output.

getWarningConfig ( $file)

Gets configuration for the file warning message.

isExpensiveToThumbnail ( $file)

True if creating thumbnails from the file is large or otherwise resource-intensive.

isMetadataValid ( $image, $metadata)

Check if the metadata string is valid for this handler.

isMultiPage ( $file)

True if the type has multi-page capabilities.

pageCount (File $file)

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

parserTransformHook ( $parser, $file)

Modify the parser object post-transform.

removeBadFile ( $dstPath, $retval=0)

Check for zero-sized thumbnails.

supportsBucketing ()

Returns whether or not this handler supports the chained generation of thumbnails according to buckets.

useSplitMetadata ()

If this returns true, LocalFile may split metadata up and store its constituent items separately.

verifyUpload ( $fileName)

File validation hook called on upload.

Static Public Member Functions
static	rasterizeImagickExt ( $srcPath, $dstPath, $width, $height)

Static Public Member Functions inherited from MediaHandler
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.

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

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

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

static	getMetadataVersion ()
	Get metadata version.

static	getPageRangesByDimensions ( $pagesByDimensions)
	Converts a dimensions array about a potentially multipage document from an exhaustive list of ordered page numbers to a list of page ranges.

Public Attributes
const	SVG_METADATA_VERSION = 2

Public Attributes inherited from MediaHandler
const	METADATA_BAD = false

const	METADATA_COMPATIBLE = 2

const	METADATA_GOOD = true

const	TRANSFORM_LATER = 1

Protected Member Functions
	getLanguageFromParams (array $params)
	Determines render language from image parameters This is a lowercase IETF language.

	getScriptParams ( $params)

	normaliseParamsInternal ( $image, $params)
	Code taken out of normaliseParams() for testability.

	validateMetadata ( $unser)

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

Protected Member Functions inherited from MediaHandler
	formatMetadataHelper ( $metadataArray, $context=false)
	sorts the visible/invisible field.

	formatTag (string $key, $vals, $context=false)
	Override default formatting for the given metadata field.

	hasMostDerivedMethod ( $name)
	Check whether a method is implemented in the most derived class.

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

	useLegacyMetadata ()
	If this returns true, the new method getSizeAndMetadata() will not be called.

Additional Inherited Members
Static Protected Member Functions inherited from MediaHandler
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.

Detailed Description

Handler for SVG images.

Definition at line 36 of file SvgHandler.php.

Member Function Documentation

◆ canAnimateThumbnail()

SvgHandler::canAnimateThumbnail ( $file )

We do not support making animated svg thumbnails.

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 172 of file SvgHandler.php.

◆ doTransform()

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

Parameters

File	$image
string	$dstPath
string	$dstUrl
array	$params
int	$flags

Returns: MediaTransformError|ThumbnailImage|TransformParameterError|false

Reimplemented from MediaHandler.

Definition at line 233 of file SvgHandler.php.

References $lang, getLanguageFromParams(), normaliseParams(), rasterize(), validateMetadata(), wfDebugLog(), wfHostname(), wfMessage(), wfMkdirParents(), wfRandomString(), and wfTempDir().

◆ formatMetadata()

SvgHandler::formatMetadata	(		$file,
			$context = false )

Parameters

File	$file
IContextSource \| false	$context

Returns: array[]|false

Reimplemented from MediaHandler.

Definition at line 491 of file SvgHandler.php.

References $file, validateMetadata(), and visibleMetadataFields().

◆ getAvailableLanguages()

SvgHandler::getAvailableLanguages ( File $file )

Which languages (systemLanguage attribute) is supported.

Note: This list is not guaranteed to be exhaustive. To avoid OOM errors, we only look at first bit of a file. Thus all languages on this list are present in the file, but its possible for the file to have a language not on this list.

Parameters

File $file

Returns: string[] Array of language codes, or empty if no language switching supported.

Reimplemented from MediaHandler.

Definition at line 98 of file SvgHandler.php.

References $file, $lang, and validateMetadata().

◆ getCommonMetaArray()

SvgHandler::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.

Stability: stable: to override

Parameters

File $file

Returns: array|false False if interface not supported

Since: 1.23

Reimplemented from MediaHandler.

Definition at line 604 of file SvgHandler.php.

References $file, and validateMetadata().

◆ getDefaultRenderLanguage()

SvgHandler::getDefaultRenderLanguage ( File $file )

What language to render file in if none selected.

Parameters

File $file Language code

Returns: string

Reimplemented from MediaHandler.

Definition at line 163 of file SvgHandler.php.

◆ getLanguageFromParams()

SvgHandler::getLanguageFromParams ( array $params )

protected

Determines render language from image parameters This is a lowercase IETF language.

Parameters

array $params

Returns: string

Definition at line 153 of file SvgHandler.php.

Referenced by doTransform(), and makeParamString().

◆ getLongDesc()

SvgHandler::getLongDesc ( $file )

Subtitle for the image.

Different from the base class so it can be denoted that SVG's have a "nominal" resolution, and not a fixed one, as well as so animation can be denoted.

Parameters

File $file

Returns: string

Reimplemented from ImageHandler.

Definition at line 413 of file SvgHandler.php.

References $file, isAnimatedImage(), validateMetadata(), and wfMessage().

◆ getMatchedLanguage()

SvgHandler::getMatchedLanguage	(		$userPreferredLanguage,
		array	$svgLanguages )

SVG's systemLanguage matching rules state: 'The systemLanguage attribute ... [e]valuates to "true" if one of the languages indicated by user preferences exactly equals one of the languages given in the value of this parameter, or if one of the languages indicated by user preferences exactly equals a prefix of one of the languages given in the value of this parameter such that the first tag character following the prefix is "-".

'

Return the first element of $svgLanguages that matches $userPreferredLanguage

See also: https://www.w3.org/TR/SVG/struct.html#SystemLanguageAttribute

Parameters

string	$userPreferredLanguage
string[]	$svgLanguages

Returns: string|null

Reimplemented from MediaHandler.

Definition at line 126 of file SvgHandler.php.

◆ getMetadataType()

SvgHandler::getMetadataType ( $image )

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

Stability: stable: to override

Note: This method is currently unused.

Parameters

File $image

Returns: string|false

Reimplemented from MediaHandler.

Definition at line 465 of file SvgHandler.php.

◆ getParamMap()

SvgHandler::getParamMap ( )

Get an associative array mapping magic word IDs to parameter names.Will be used by the parser to identify parameters.

Returns: string[]

Stability: stable: to override

Returns: string[]

Stability: stable: to override

Returns: string[]

Reimplemented from ImageHandler.

Definition at line 587 of file SvgHandler.php.

◆ getScriptParams()

SvgHandler::getScriptParams ( $params )

protected

Parameters

array $params

Returns: array

Reimplemented from ImageHandler.

Definition at line 595 of file SvgHandler.php.

◆ getSizeAndMetadata()

SvgHandler::getSizeAndMetadata	(		$state,
			$filename )

Parameters

MediaHandlerState	$state
string	$filename

Returns: array

Reimplemented from ImageHandler.

Definition at line 433 of file SvgHandler.php.

References wfDebug().

◆ getThumbType()

SvgHandler::getThumbType	(	$ext,
		$mime,
		$params = null )

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

Stability: stable: to override

Parameters

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

Returns: array Thumbnail extension and MIME type

Reimplemented from MediaHandler.

Definition at line 400 of file SvgHandler.php.

◆ isAnimatedImage()

SvgHandler::isAnimatedImage ( $file )

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 76 of file SvgHandler.php.

References $file, and validateMetadata().

Referenced by getLongDesc().

◆ isEnabled()

SvgHandler::isEnabled ( )

False if the handler is disabled for all files.

Stability: stable: to override

Returns: bool

Reimplemented from MediaHandler.

Definition at line 52 of file SvgHandler.php.

References wfDebug().

◆ isFileMetadataValid()

SvgHandler::isFileMetadataValid ( $image )

Check if the metadata 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, MediaHandler::METADATA_COMPATIBLE if metadata is old but backwards compatible (which may or may not trigger a metadata reload).

Note: Returning self::METADATA_BAD will trigger a metadata reload from file on page view. Always returning this from a broken file, or suddenly triggering as bad metadata for a large number of files can cause performance problems.

This was introduced in 1.37 to replace isMetadataValid(), which took a serialized string as a parameter. Handlers overriding this method are expected to use accessors to get the metadata out of the File. The reasons for the change were to get rid of serialization, and to allow handlers to partially load metadata with getMetadataItem(). For example a handler could just validate a version number.

Stability: stable: to override

Since: 1.37

Parameters

File $image

Returns: bool|int

Reimplemented from MediaHandler.

Definition at line 469 of file SvgHandler.php.

References validateMetadata().

◆ isVectorized()

SvgHandler::isVectorized ( $file )

The material is vectorized and thus scaling is lossless.

Stability: stable: to override

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 68 of file SvgHandler.php.

◆ makeParamString()

SvgHandler::makeParamString ( $params )

Parameters

array $params Name=>value pairs of parameters

Returns: string|false Filename to use

Reimplemented from ImageHandler.

Definition at line 559 of file SvgHandler.php.

References $lang, and getLanguageFromParams().

◆ mustRender()

SvgHandler::mustRender ( $file )

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

Stability: stable: to override

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 64 of file SvgHandler.php.

◆ normaliseParams()

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

Parameters

File	$image
array	&$params

Returns: bool

Reimplemented from ImageHandler.

Definition at line 181 of file SvgHandler.php.

References normaliseParamsInternal().

Referenced by doTransform().

◆ normaliseParamsInternal()

SvgHandler::normaliseParamsInternal	(		$image,
			$params )

protected

Code taken out of normaliseParams() for testability.

Since: 1.33

Parameters

File	$image
array	$params

Returns: array Modified $params

Definition at line 199 of file SvgHandler.php.

Referenced by normaliseParams().

◆ parseParamString()

SvgHandler::parseParamString ( $str )

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|false Array of parameters or false on failure.

Stability: stable: to override

Stability: stable: to override

Reimplemented from ImageHandler.

Definition at line 572 of file SvgHandler.php.

◆ rasterize()

SvgHandler::rasterize	(	$srcPath,
		$dstPath,
		$width,
		$height,
		$lang = false )

Transform an SVG file to PNG This function can be called outside of thumbnail contexts.

Parameters

string	$srcPath
string	$dstPath
int	$width
int	$height
string \| false	$lang	Language code of the language to render the SVG in

Exceptions

MWException

Returns: bool|MediaTransformError

Definition at line 327 of file SvgHandler.php.

References $lang, $path, MediaHandler\logErrorForExternalProcess(), MediaHandler\removeBadFile(), wfDebug(), and wfShellExecWithStderr().

Referenced by doTransform(), and MediaWiki\ResourceLoader\Image\rasterize().

◆ rasterizeImagickExt()

static SvgHandler::rasterizeImagickExt	(	$srcPath,
		$dstPath,
		$width,
		$height )

static

Definition at line 385 of file SvgHandler.php.

◆ validateMetadata()

SvgHandler::validateMetadata ( $unser )

protected

Definition at line 457 of file SvgHandler.php.

Referenced by doTransform(), formatMetadata(), getAvailableLanguages(), getCommonMetaArray(), getLongDesc(), isAnimatedImage(), and isFileMetadataValid().

◆ validateParam()

SvgHandler::validateParam	(		$name,
			$value )

Parameters

string	$name	Parameter name
mixed	$value	Parameter value

Returns: bool Validity

Reimplemented from ImageHandler.

Definition at line 535 of file SvgHandler.php.

◆ visibleMetadataFields()

SvgHandler::visibleMetadataFields ( )

protected

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

Stability: stable: to override

Returns: string[]

Reimplemented from MediaHandler.

Definition at line 482 of file SvgHandler.php.

Referenced by formatMetadata().

Member Data Documentation

◆ SVG_METADATA_VERSION

const SvgHandler::SVG_METADATA_VERSION = 2

Definition at line 37 of file SvgHandler.php.

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

includes/media/SvgHandler.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ canAnimateThumbnail()

◆ doTransform()

◆ formatMetadata()

◆ getAvailableLanguages()

◆ getCommonMetaArray()

◆ getDefaultRenderLanguage()

◆ getLanguageFromParams()

◆ getLongDesc()

◆ getMatchedLanguage()

◆ getMetadataType()

◆ getParamMap()

◆ getScriptParams()

◆ getSizeAndMetadata()

◆ getThumbType()

◆ isAnimatedImage()

◆ isEnabled()

◆ isFileMetadataValid()

◆ isVectorized()

◆ makeParamString()

◆ mustRender()

◆ normaliseParams()

◆ normaliseParamsInternal()

◆ parseParamString()

◆ rasterize()

◆ rasterizeImagickExt()

◆ validateMetadata()

◆ validateParam()

◆ visibleMetadataFields()

Member Data Documentation

◆ SVG_METADATA_VERSION