<?php
-
/**
* Media-handling base classes and generic functionality
+ *
+ * @file
+ * @ingroup Media
*/
/**
* Base media handler class
*
- * @addtogroup Media
+ * @ingroup Media
*/
abstract class MediaHandler {
const TRANSFORM_LATER = 1;
-
+ const METADATA_GOOD = true;
+ const METADATA_BAD = false;
+ const METADATA_COMPATIBLE = 2; // for old but backwards compatible.
/**
* Instance cache
*/
/**
* Get a MediaHandler for a given MIME type from the instance cache
+ *
+ * @param $type string
+ *
+ * @return MediaHandler
*/
static function getHandler( $type ) {
global $wgMediaHandlers;
return self::$handlers[$class];
}
- /*
- * Validate a thumbnail parameter at parse time.
+ /**
+ * Get an associative array mapping magic word IDs to parameter names.
+ * Will be used by the parser to identify parameters.
+ */
+ abstract function getParamMap();
+
+ /**
+ * 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.
+ *
+ * @param $name
+ * @param $value
*/
abstract function validateParam( $name, $value );
/**
* Merge a parameter array into a string appropriate for inclusion in filenames
+ *
+ * @param $params array
*/
abstract function makeParamString( $params );
/**
* Parse a param string made with makeParamString back into an array
+ *
+ * @param $str string
*/
abstract function parseParamString( $str );
/**
- * Changes the parameter array as necessary, ready for transformation.
+ * Changes the parameter array as necessary, ready for transformation.
* Should be idempotent.
* Returns false if the parameters are unacceptable and the transform should fail
+ * @param $image
+ * @param $params
*/
abstract function normaliseParams( $image, &$params );
/**
- * Get an image size array like that returned by getimagesize(), or false if it
+ * Get an image size array like that returned by getimagesize(), or false if it
* can't be determined.
*
- * @param Image $image The image object, or false if there isn't one
- * @param string $fileName The filename
- * @return array
+ * @param $image File: the image object, or false if there isn't one
+ * @param $path String: the filename
+ * @return Array
*/
abstract function getImageSize( $image, $path );
/**
* Get handler-specific metadata which will be saved in the img_metadata field.
*
- * @param Image $image The image object, or false if there isn't one
- * @param string $fileName The filename
- * @return string
+ * @param $image File: the image object, or false if there isn't one.
+ * Warning, File::getPropsFromPath might pass an (object)array() instead (!)
+ * @param $path String: the filename
+ * @return String
*/
function getMetadata( $image, $path ) { return ''; }
+ /**
+ * 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'.
+ *
+ * @return string version string
+ */
+ static function getMetadataVersion () {
+ $version = Array( '2' ); // core metadata version
+ wfRunHooks('GetMetadataVersion', Array(&$version));
+ return implode( ';', $version);
+ }
+
+ /**
+ * Convert metadata version.
+ *
+ * By default just returns $metadata, but can be used to allow
+ * media handlers to convert between metadata versions.
+ *
+ * @param $metadata Mixed String or Array metadata array (serialized if string)
+ * @param $version Integer target version
+ * @return Array serialized metadata in specified version, or $metadata on fail.
+ */
+ function convertMetadataVersion( $metadata, $version = 1 ) {
+ if ( !is_array( $metadata ) ) {
+
+ //unserialize to keep return parameter consistent.
+ wfSuppressWarnings();
+ $ret = unserialize( $metadata );
+ wfRestoreWarnings();
+ return $ret;
+ }
+ return $metadata;
+ }
+
/**
* Get a string describing the type of metadata, for display purposes.
+ *
+ * @return string
*/
function getMetadataType( $image ) { return false; }
/**
* Check if the metadata string is valid for this handler.
- * If it returns false, Image will reload the metadata from the file and update the database
+ * 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).
+ */
+ function isMetadataValid( $image, $metadata ) {
+ return self::METADATA_GOOD;
+ }
+
+
+ /**
+ * 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().
*/
- function isMetadataValid( $image, $metadata ) { return true; }
+ function getScriptedTransform( $image, $script, $params ) {
+ return false;
+ }
/**
- * Get a MediaTransformOutput object representing the transformed output. Does not
+ * Get a MediaTransformOutput object representing the transformed output. Does not
* actually do the transform.
*
- * @param Image $image The image object
- * @param string $dstPath Filesystem destination path
- * @param string $dstUrl Destination URL to use in output HTML
- * @param array $params Arbitrary set of parameters validated by $this->validateParam()
+ * @param $image File: the image object
+ * @param $dstPath String: filesystem destination path
+ * @param $dstUrl String: Destination URL to use in output HTML
+ * @param $params Array: Arbitrary set of parameters validated by $this->validateParam()
*/
function getTransform( $image, $dstPath, $dstUrl, $params ) {
return $this->doTransform( $image, $dstPath, $dstUrl, $params, self::TRANSFORM_LATER );
}
/**
- * Get a MediaTransformOutput object representing the transformed output. Does the
+ * Get a MediaTransformOutput object representing the transformed output. Does the
* transform unless $flags contains self::TRANSFORM_LATER.
*
- * @param Image $image The image object
- * @param string $dstPath Filesystem destination path
- * @param string $dstUrl Destination URL to use in output HTML
- * @param array $params Arbitrary set of parameters validated by $this->validateParam()
- * @param integer $flags A bitfield, may contain self::TRANSFORM_LATER
+ * @param $image File: the image object
+ * @param $dstPath String: filesystem destination path
+ * @param $dstUrl String: destination URL to use in output HTML
+ * @param $params Array: arbitrary set of parameters validated by $this->validateParam()
+ * @param $flags Integer: a bitfield, may contain self::TRANSFORM_LATER
+ *
+ * @return MediaTransformOutput
*/
abstract function doTransform( $image, $dstPath, $dstUrl, $params, $flags = 0 );
* Get the thumbnail extension and MIME type for a given source MIME type
* @return array thumbnail extension and MIME type
*/
- function getThumbType( $ext, $mime ) {
+ function getThumbType( $ext, $mime, $params = null ) {
+ $magic = MimeMagic::singleton();
+ if ( !$ext || $magic->isMatchingExtension( $ext, $mime ) === false ) {
+ // The extension is not valid for this mime type and we do
+ // recognize the mime type
+ $extensions = $magic->getExtensionsForType( $mime );
+ if ( $extensions ) {
+ return array( strtok( $extensions, ' ' ), $mime );
+ }
+ }
+
+ // The extension is correct (true) or the mime type is unknown to
+ // MediaWiki (null)
return array( $ext, $mime );
- }
+ }
/**
* True if the handled types can be transformed
*/
- function canRender() { return true; }
+ function canRender( $file ) { return true; }
/**
- * True if handled types cannot be displayed directly in a browser
+ * True if handled types cannot be displayed directly in a browser
* but can be rendered
*/
- function mustRender() { return false; }
+ function mustRender( $file ) { return false; }
/**
* True if the type has multi-page capabilities
*/
- function isMultiPage() { return false; }
+ function isMultiPage( $file ) { return false; }
/**
* Page count for a multi-page document, false if unsupported or unknown
*/
- function pageCount() { return false; }
+ function pageCount( $file ) { return false; }
+ /**
+ * The material is vectorized and thus scaling is lossless
+ */
+ function isVectorized( $file ) { return false; }
/**
* False if the handler is disabled for all files
*/
/**
* Get an associative array of page dimensions
- * Currently "width" and "height" are understood, but this might be
+ * Currently "width" and "height" are understood, but this might be
* expanded in the future.
* Returns false if unknown or if the document is not multi-page.
+ *
+ * @param $image File
*/
function getPageDimensions( $image, $page ) {
- $gis = $this->getImageSize( $image, $image->getImagePath() );
+ $gis = $this->getImageSize( $image, $image->getPath() );
return array(
'width' => $gis[0],
'height' => $gis[1]
);
}
+
+ /**
+ * Generic getter for text layer.
+ * Currently overloaded by PDF and DjVu handlers
+ */
+ function getPageText( $image, $page ) {
+ return false;
+ }
+
+ /**
+ * 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: I don't really like this interface, it's not very flexible
+ * I think 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.
+ */
+ function formatMetadata( $image ) {
+ return false;
+ }
+
+ /** 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
+ *
+ * @param $metadataArray Array metadata array
+ * @return array for use displaying metadata.
+ */
+ function formatMetadataHelper( $metadataArray ) {
+ $result = array(
+ 'visible' => array(),
+ 'collapsed' => array()
+ );
+
+ $formatted = FormatMetadata::getFormattedData( $metadataArray );
+ // Sort fields into visible and collapsed
+ $visibleFields = $this->visibleMetadataFields();
+ foreach ( $formatted as $name => $value ) {
+ $tag = strtolower( $name );
+ self::addMeta( $result,
+ in_array( $tag, $visibleFields ) ? 'visible' : 'collapsed',
+ 'exif',
+ $tag,
+ $value
+ );
+ }
+ return $result;
+ }
+
+ /**
+ * Get a list of metadata items which should be displayed when
+ * the metadata table is collapsed.
+ *
+ * @return array of strings
+ * @access protected
+ */
+ function visibleMetadataFields() {
+ $fields = array();
+ $lines = explode( "\n", wfMsgForContent( 'metadata-fields' ) );
+ foreach( $lines as $line ) {
+ $matches = array();
+ if( preg_match( '/^\\*\s*(.*?)\s*$/', $line, $matches ) ) {
+ $fields[] = $matches[1];
+ }
+ }
+ $fields = array_map( 'strtolower', $fields );
+ return $fields;
+ }
+
+
+ /**
+ * This is used to generate an array element for each metadata value
+ * That array is then used to generate the table of metadata values
+ * on the image page
+ *
+ * @param &$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.
+ * @param $visbility string ('visible' or 'collapsed') if this value is hidden
+ * by default.
+ * @param $type String type of metadata tag (currently always 'exif')
+ * @param $id String the name of the metadata tag (like 'artist' for example).
+ * its name in the table displayed is the message "$type-$id" (Ex exif-artist ).
+ * @param $value String 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.
+ * @param $param String value to pass to the message for the name of the field
+ * as $1. Currently this parameter doesn't seem to ever be used.
+ *
+ * Note, everything here is passed through the parser later on (!)
+ */
+ protected static function addMeta( &$array, $visibility, $type, $id, $value, $param = false ) {
+ $msg = wfMessage( "$type-$id", $param );
+ if ( $msg->exists() ) {
+ $name = $msg->text();
+ } else {
+ // This is for future compatibility when using instant commons.
+ // So as to not display as ugly a name if a new metadata
+ // property is defined that we don't know about
+ // (not a major issue since such a property would be collapsed
+ // by default).
+ wfDebug( __METHOD__ . ' Unknown metadata name: ' . $id . "\n" );
+ $name = wfEscapeWikiText( $id );
+ }
+ $array[$visibility][] = array(
+ 'id' => "$type-$id",
+ 'name' => $name,
+ 'value' => $value
+ );
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ function getShortDesc( $file ) {
+ return wfMessage( 'nbytes' )->numParams( $file->getSize() )->escaped();
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ function getLongDesc( $file ) {
+ global $wgLang;
+ return wfMessage( 'file-info', $wgLang->formatSize( $file->getSize() ),
+ $file->getMimeType() )->parse();
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ static function getGeneralShortDesc( $file ) {
+ return wfMessage( 'nbytes' )->numParams( $file->getSize() )->escaped();
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ static function getGeneralLongDesc( $file ) {
+ global $wgLang;
+ return wfMessage( 'file-info', $wgLang->formatSize( $file->getSize() ),
+ $file->getMimeType() )->parse();
+ }
+
+ /**
+ * Calculate the largest thumbnail width for a given original file size
+ * such that the thumbnail's height is at most $maxHeight.
+ * @param $boxWidth Integer Width of the thumbnail box.
+ * @param $boxHeight Integer Height of the thumbnail box.
+ * @param $maxHeight Integer Maximum height expected for the thumbnail.
+ * @return Integer.
+ */
+ public static function fitBoxWidth( $boxWidth, $boxHeight, $maxHeight ) {
+ $idealWidth = $boxWidth * $maxHeight / $boxHeight;
+ $roundedUp = ceil( $idealWidth );
+ if( round( $roundedUp * $boxHeight / $boxWidth ) > $maxHeight ) {
+ return floor( $idealWidth );
+ } else {
+ return $roundedUp;
+ }
+ }
+
+ function getDimensionsString( $file ) {
+ return '';
+ }
+
+ /**
+ * Modify the parser object post-transform
+ */
+ function parserTransformHook( $parser, $file ) {}
+
+ /**
+ * 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.
+ *
+ * @param $fileName The local path to the file.
+ * @return Status object
+ */
+ function verifyUpload( $fileName ) {
+ return Status::newGood();
+ }
+
+ /**
+ * Check for zero-sized thumbnails. These can be generated when
+ * no disk space is available or some other error occurs
+ *
+ * @param $dstPath The location of the suspect file
+ * @param $retval Return value of some shell process, file will be deleted if this is non-zero
+ * @return true if removed, false otherwise
+ */
+ function removeBadFile( $dstPath, $retval = 0 ) {
+ if( file_exists( $dstPath ) ) {
+ $thumbstat = stat( $dstPath );
+ if( $thumbstat['size'] == 0 || $retval != 0 ) {
+ $result = unlink( $dstPath );
+
+ if ( $result ) {
+ wfDebugLog( 'thumbnail',
+ sprintf( 'Removing bad %d-byte thumbnail "%s". unlink() succeeded',
+ $thumbstat['size'], $dstPath ) );
+ } else {
+ wfDebugLog( 'thumbnail',
+ sprintf( 'Removing bad %d-byte thumbnail "%s". unlink() failed',
+ $thumbstat['size'], $dstPath ) );
+ }
+ return true;
+ }
+ }
+ return false;
+ }
}
/**
* Media handler abstract base class for images
*
- * @addtogroup Media
+ * @ingroup Media
*/
abstract class ImageHandler extends MediaHandler {
+
+ /**
+ * @param $file File
+ * @return bool
+ */
+ function canRender( $file ) {
+ return ( $file->getWidth() && $file->getHeight() );
+ }
+
+ function getParamMap() {
+ return array( 'img_width' => 'width' );
+ }
+
function validateParam( $name, $value ) {
if ( in_array( $name, array( 'width', 'height' ) ) ) {
if ( $value <= 0 ) {
return array( 'width' => $params['width'] );
}
+ /**
+ * @param $image File
+ * @param $params
+ * @return bool
+ */
function normaliseParams( $image, &$params ) {
$mimeType = $image->getMimeType();
if ( !isset( $params['width'] ) ) {
return false;
}
+
if ( !isset( $params['page'] ) ) {
$params['page'] = 1;
+ } else {
+ if ( $params['page'] > $image->pageCount() ) {
+ $params['page'] = $image->pageCount();
+ }
+
+ if ( $params['page'] < 1 ) {
+ $params['page'] = 1;
+ }
}
+
$srcWidth = $image->getWidth( $params['page'] );
$srcHeight = $image->getHeight( $params['page'] );
+
if ( isset( $params['height'] ) && $params['height'] != -1 ) {
+ # Height & width were both set
if ( $params['width'] * $srcHeight > $params['height'] * $srcWidth ) {
- $params['width'] = wfFitBoxWidth( $srcWidth, $srcHeight, $params['height'] );
+ # Height is the relative smaller dimension, so scale width accordingly
+ $params['width'] = self::fitBoxWidth( $srcWidth, $srcHeight, $params['height'] );
+
+ if ( $params['width'] == 0 ) {
+ # Very small image, so we need to rely on client side scaling :(
+ $params['width'] = 1;
+ }
+
+ $params['physicalWidth'] = $params['width'];
+ } else {
+ # Height was crap, unset it so that it will be calculated later
+ unset( $params['height'] );
}
}
- $params['height'] = Image::scaleHeight( $srcWidth, $srcHeight, $params['width'] );
- if ( !$this->validateThumbParams( $params['width'], $params['height'], $srcWidth, $srcHeight, $mimeType ) ) {
+
+ if ( !isset( $params['physicalWidth'] ) ) {
+ # Passed all validations, so set the physicalWidth
+ $params['physicalWidth'] = $params['width'];
+ }
+
+ # Because thumbs are only referred to by width, the height always needs
+ # to be scaled by the width to keep the thumbnail sizes consistent,
+ # even if it was set inside the if block above
+ $params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight,
+ $params['physicalWidth'] );
+
+ # Set the height if it was not validated in the if block higher up
+ if ( !isset( $params['height'] ) || $params['height'] == -1 ) {
+ $params['height'] = $params['physicalHeight'];
+ }
+
+
+ if ( !$this->validateThumbParams( $params['physicalWidth'],
+ $params['physicalHeight'], $srcWidth, $srcHeight, $mimeType ) ) {
return false;
}
return true;
function getTransform( $image, $dstPath, $dstUrl, $params ) {
return $this->doTransform( $image, $dstPath, $dstUrl, $params, self::TRANSFORM_LATER );
}
-
+
/**
* Validate thumbnail parameters and fill in the correct height
*
- * @param integer &$width Specified width (input/output)
- * @param integer &$height Height (output only)
- * @return false to indicate that an error should be returned to the user.
+ * @param $width Integer: specified width (input/output)
+ * @param $height Integer: height (output only)
+ * @param $srcWidth Integer: width of the source image
+ * @param $srcHeight Integer: height of the source image
+ * @param $mimeType Unused
+ * @return false to indicate that an error should be returned to the user.
*/
function validateThumbParams( &$width, &$height, $srcWidth, $srcHeight, $mimeType ) {
$width = intval( $width );
return false;
}
- $height = Image::scaleHeight( $srcWidth, $srcHeight, $width );
+ $height = File::scaleHeight( $srcWidth, $srcHeight, $width );
+ if ( $height == 0 ) {
+ # Force height to be at least 1 pixel
+ $height = 1;
+ }
return true;
}
+ /**
+ * @param $image File
+ * @param $script
+ * @param $params
+ * @return bool|ThumbnailImage
+ */
function getScriptedTransform( $image, $script, $params ) {
if ( !$this->normaliseParams( $image, $params ) ) {
return false;
}
$url = $script . '&' . wfArrayToCGI( $this->getScriptParams( $params ) );
- return new ThumbnailImage( $url, $params['width'], $params['height'] );
- }
+ $page = isset( $params['page'] ) ? $params['page'] : false;
- /**
- * Check for zero-sized thumbnails. These can be generated when
- * no disk space is available or some other error occurs
- *
- * @param $dstPath The location of the suspect file
- * @param $retval Return value of some shell process, file will be deleted if this is non-zero
- * @return true if removed, false otherwise
- */
- function removeBadFile( $dstPath, $retval = 0 ) {
- if( file_exists( $dstPath ) ) {
- $thumbstat = stat( $dstPath );
- if( $thumbstat['size'] == 0 || $retval != 0 ) {
- wfDebugLog( 'thumbnail',
- sprintf( 'Removing bad %d-byte thumbnail "%s"',
- $thumbstat['size'], $dstPath ) );
- unlink( $dstPath );
- return true;
- }
+ if( $image->mustRender() || $params['width'] < $image->getWidth() ) {
+ return new ThumbnailImage( $image, $url, $params['width'], $params['height'], $page );
}
- return false;
}
function getImageSize( $image, $path ) {
wfRestoreWarnings();
return $gis;
}
-}
-?>
+ function isAnimatedImage( $image ) {
+ return false;
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ function getShortDesc( $file ) {
+ $nbytes = wfMessage( 'nbytes' )->numParams( $file->getSize() )->escaped();
+ $widthheight = wfMessage( 'widthheight' )->numParams( $file->getWidth(), $file->getHeight() )->escaped();
+
+ return "$widthheight ($nbytes)";
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ function getLongDesc( $file ) {
+ global $wgLang;
+ $pages = $file->pageCount();
+ if ( $pages === false || $pages <= 1 ) {
+ $msg = wfMessage( 'file-info-size' )->numParams( $file->getWidth(),
+ $file->getHeight() )->params( $wgLang->formatSize( $file->getSize() ),
+ $file->getMimeType() )->parse();
+ } else {
+ $msg = wfMessage( 'file-info-size-pages' )->numParams( $file->getWidth(),
+ $file->getHeight() )->params( $wgLang->formatSize( $file->getSize() ),
+ $file->getMimeType() )->numParams( $pages )->parse();
+ }
+ return $msg;
+ }
+
+ /**
+ * @param $file File
+ * @return string
+ */
+ function getDimensionsString( $file ) {
+ $pages = $file->pageCount();
+ if ( $pages > 1 ) {
+ return wfMessage( 'widthheightpage' )->numParams( $file->getWidth(), $file->getHeight(), $pages )->text();
+ } else {
+ return wfMessage( 'widthheight' )->numParams( $file->getWidth(), $file->getHeight() )->text();
+ }
+ }
+}
dépôts / lhc / web / wiklou.git / blobdiff