Handler for SVG images. More...

Inheritance diagram for SvgHandler:

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Collaboration diagram for SvgHandler:

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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.

	getImageSize ( $file, $path, $metadata=false)

	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 "-".

	getMetadata ( $file, $filename)

	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.

	getScriptParams ( $params)

	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.

	isMetadataValid ( $image, $metadata)
	Check if the metadata string 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.

	rasterize ( $srcPath, $dstPath, $width, $height, $lang=false)
	Transform an SVG file to PNG This function can be called outside of thumbnail contexts.

	unpackMetadata ( $metadata)

	validateParam ( $name, $value)

Public Member Functions inherited from ImageHandler
	canRender ( $file)

	getDimensionsString ( $file)

	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)

	getShortDesc ( $file)

	sanitizeParamsForBucketing ( $params)
	Returns a normalised params array for which parameters have been cleaned up for bucketing purposes.

	validateThumbParams (&$width, &$height, $srcWidth, $srcHeight, $mimeType)
	Validate thumbnail parameters and fill in the correct height.

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.

	formatMetadataHelper ( $metadataArray, $context=false)
	sorts the visible/invisible field.

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

	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.

	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.

	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.

	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	MAX_ERR_LOG_SIZE = 65535
	Max length of error logged by logErrorForExternalProcess()

const	METADATA_BAD = false

const	METADATA_COMPATIBLE = 2

const	METADATA_GOOD = true

const	TRANSFORM_LATER = 1

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

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

Static Private Attributes
static array	$metaConversion
	A list of metadata tags that can be converted to the commonly used exif tags.

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 30 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 154 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: bool|MediaTransformError|ThumbnailImage|TransformParameterError

Reimplemented from MediaHandler.

Reimplemented in MockSvgHandler.

Definition at line 196 of file SvgHandler.php.

References $image, $lang, $params, getDefaultRenderLanguage(), normaliseParams(), rasterize(), text, unpackMetadata(), use, wfDebugLog(), wfHostname(), wfMessage(), wfMkdirParents(), wfRandomString(), and wfTempDir().

◆ formatMetadata()

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

Parameters

File	$file
bool \| IContextSource	$context	Context to use (optional)

Returns: array|bool

Reimplemented from MediaHandler.

Definition at line 463 of file SvgHandler.php.

References $name, $value, MediaHandler\addMeta(), as, unpackMetadata(), 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: array Array of language codes, or empty if no language switching supported.

Reimplemented from MediaHandler.

Definition at line 92 of file SvgHandler.php.

References $lang, as, File\getMetadata(), SVGReader\LANG_FULL_MATCH, and unpackMetadata().

◆ 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.

Parameters

File $file

Returns: array|bool False if interface not supported

Since: 1.23

Reimplemented from MediaHandler.

Definition at line 572 of file SvgHandler.php.

References $name, $value, as, File\getMetadata(), and unpackMetadata().

◆ 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 145 of file SvgHandler.php.

Referenced by doTransform().

◆ getImageSize()

SvgHandler::getImageSize	(	$file,
		$path,
		$metadata = `false`
	)

Parameters

File \| FSFile	$file
string	$path	Unused
bool \| array	$metadata

Returns: array

Definition at line 355 of file SvgHandler.php.

References unpackMetadata().

◆ 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 382 of file SvgHandler.php.

References $wgLang, isAnimatedImage(), unpackMetadata(), 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
array	$svgLanguages

Returns: string|null

Reimplemented from MediaHandler.

Definition at line 123 of file SvgHandler.php.

References as.

◆ getMetadata()

SvgHandler::getMetadata	(	$file,
		$filename
	)

Parameters

File \| FSFile	$file
string	$filename

Returns: string Serialised metadata

Reimplemented from MediaHandler.

Definition at line 408 of file SvgHandler.php.

References $e, SVGMetadataExtractor\getMetadata(), serialize(), SVG_METADATA_VERSION, and wfDebug().

◆ getMetadataType()

SvgHandler::getMetadataType ( $image )

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

Note: This method is currently unused.

Parameters

File $image

Returns: string

Reimplemented from MediaHandler.

Definition at line 435 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.

Reimplemented from ImageHandler.

Definition at line 555 of file SvgHandler.php.

◆ getScriptParams()

SvgHandler::getScriptParams ( $params )

Parameters

array $params

Returns: array

Reimplemented from ImageHandler.

Definition at line 563 of file SvgHandler.php.

References $params.

◆ getThumbType()

SvgHandler::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 \| null	$params	Handler specific rendering parameters

Returns: array Thumbnail extension and MIME type

Reimplemented from MediaHandler.

Definition at line 369 of file SvgHandler.php.

◆ isAnimatedImage()

SvgHandler::isAnimatedImage ( $file )

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 67 of file SvgHandler.php.

References unpackMetadata().

Referenced by getLongDesc().

◆ isEnabled()

SvgHandler::isEnabled ( )

False if the handler is disabled for all files.

Returns: bool

Reimplemented from MediaHandler.

Definition at line 44 of file SvgHandler.php.

References $wgSVGConverter, $wgSVGConverters, and wfDebug().

◆ isMetadataValid()

SvgHandler::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, 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.

Parameters

File	$image
string	$metadata	The metadata in serialized form

Returns: bool

Reimplemented from MediaHandler.

Definition at line 439 of file SvgHandler.php.

References MediaHandler\METADATA_BAD, MediaHandler\METADATA_COMPATIBLE, MediaHandler\METADATA_GOOD, and unpackMetadata().

◆ isVectorized()

SvgHandler::isVectorized ( $file )

The material is vectorized and thus scaling is lossless.

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 59 of file SvgHandler.php.

◆ makeParamString()

SvgHandler::makeParamString ( $params )

Parameters

array $params Name=>value pairs of parameters

Returns: string Filename to use

Reimplemented from ImageHandler.

Definition at line 532 of file SvgHandler.php.

References $lang, and $params.

◆ mustRender()

SvgHandler::mustRender ( $file )

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

Parameters

File $file

Returns: bool

Reimplemented from MediaHandler.

Definition at line 55 of file SvgHandler.php.

◆ normaliseParams()

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

Parameters

File	$image
array	&$params

Returns: bool

Reimplemented from ImageHandler.

Definition at line 163 of file SvgHandler.php.

References $image, $params, $wgSVGMaxSize, and File\scaleHeight().

Referenced by doTransform().

◆ 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|bool Array of parameters or false on failure.

Reimplemented from ImageHandler.

Definition at line 544 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
string	$width
string	$height
bool \| string	$lang	Language code of the language to render the SVG in

Exceptions

MWException

Returns: bool|MediaTransformError

Definition at line 286 of file SvgHandler.php.

References $lang, $retval, $wgSVGConverter, $wgSVGConverterPath, $wgSVGConverters, MediaHandler\logErrorForExternalProcess(), MediaHandler\removeBadFile(), wfDebug(), wfEscapeShellArg(), and wfShellExecWithStderr().

Referenced by doTransform(), and ResourceLoaderImage\rasterize().

◆ rasterizeImagickExt()

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

static

Definition at line 335 of file SvgHandler.php.

◆ unpackMetadata()

SvgHandler::unpackMetadata ( $metadata )

Definition at line 424 of file SvgHandler.php.

References unserialize().

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

◆ validateParam()

SvgHandler::validateParam	(	$name,
		$value
	)

Parameters

string	$name	Parameter name
mixed	$value	Parameter value

Returns: bool Validity

Reimplemented from ImageHandler.

Definition at line 511 of file SvgHandler.php.

References $name, and $value.

◆ visibleMetadataFields()

SvgHandler::visibleMetadataFields ( )

protected

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

Returns: array Array of strings

Reimplemented from MediaHandler.

Definition at line 452 of file SvgHandler.php.

Referenced by formatMetadata().

Member Data Documentation

◆ $metaConversion

array SvgHandler::$metaConversion

staticprivate

Initial value:

= [
        'originalwidth' => 'ImageWidth',
        'originalheight' => 'ImageLength',
        'description' => 'ImageDescription',
        'title' => 'ObjectName',
    ]

A list of metadata tags that can be converted to the commonly used exif tags.

This allows messages to be reused, and consistent tag names for {{#formatmetadata:..}}

Definition at line 37 of file SvgHandler.php.

◆ SVG_METADATA_VERSION

const SvgHandler::SVG_METADATA_VERSION = 2

Definition at line 31 of file SvgHandler.php.

Referenced by getMetadata().

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

Static Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ canAnimateThumbnail()

◆ doTransform()

◆ formatMetadata()

◆ getAvailableLanguages()

◆ getCommonMetaArray()

◆ getDefaultRenderLanguage()

◆ getImageSize()

◆ getLongDesc()

◆ getMatchedLanguage()

◆ getMetadata()

◆ getMetadataType()

◆ getParamMap()

◆ getScriptParams()

◆ getThumbType()

◆ isAnimatedImage()

◆ isEnabled()

◆ isMetadataValid()

◆ isVectorized()

◆ makeParamString()

◆ mustRender()

◆ normaliseParams()

◆ parseParamString()

◆ rasterize()

◆ rasterizeImagickExt()

◆ unpackMetadata()

◆ validateParam()

◆ visibleMetadataFields()

Member Data Documentation

◆ $metaConversion

◆ SVG_METADATA_VERSION