565 lines
16 KiB
PHP
565 lines
16 KiB
PHP
<?php
|
|
/**
|
|
* Handler for SVG images.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*
|
|
* @file
|
|
* @ingroup Media
|
|
*/
|
|
use Wikimedia\ScopedCallback;
|
|
|
|
/**
|
|
* Handler for SVG images.
|
|
*
|
|
* @ingroup Media
|
|
*/
|
|
class SvgHandler extends ImageHandler {
|
|
const SVG_METADATA_VERSION = 2;
|
|
|
|
/** @var array 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:..}}
|
|
*/
|
|
private static $metaConversion = [
|
|
'originalwidth' => 'ImageWidth',
|
|
'originalheight' => 'ImageLength',
|
|
'description' => 'ImageDescription',
|
|
'title' => 'ObjectName',
|
|
];
|
|
|
|
function isEnabled() {
|
|
global $wgSVGConverters, $wgSVGConverter;
|
|
if ( !isset( $wgSVGConverters[$wgSVGConverter] ) ) {
|
|
wfDebug( "\$wgSVGConverter is invalid, disabling SVG rendering.\n" );
|
|
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public function mustRender( $file ) {
|
|
return true;
|
|
}
|
|
|
|
function isVectorized( $file ) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param File $file
|
|
* @return bool
|
|
*/
|
|
function isAnimatedImage( $file ) {
|
|
# @todo Detect animated SVGs
|
|
$metadata = $file->getMetadata();
|
|
if ( $metadata ) {
|
|
$metadata = $this->unpackMetadata( $metadata );
|
|
if ( isset( $metadata['animated'] ) ) {
|
|
return $metadata['animated'];
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param File $file
|
|
* @return array Array of language codes, or empty if no language switching supported.
|
|
*/
|
|
public function getAvailableLanguages( File $file ) {
|
|
$metadata = $file->getMetadata();
|
|
$langList = [];
|
|
if ( $metadata ) {
|
|
$metadata = $this->unpackMetadata( $metadata );
|
|
if ( isset( $metadata['translations'] ) ) {
|
|
foreach ( $metadata['translations'] as $lang => $langType ) {
|
|
if ( $langType === SVGReader::LANG_FULL_MATCH ) {
|
|
$langList[] = $lang;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return $langList;
|
|
}
|
|
|
|
/**
|
|
* What language to render file in if none selected.
|
|
*
|
|
* @param File $file
|
|
* @return string Language code.
|
|
*/
|
|
public function getDefaultRenderLanguage( File $file ) {
|
|
return 'en';
|
|
}
|
|
|
|
/**
|
|
* We do not support making animated svg thumbnails
|
|
* @param File $file
|
|
* @return bool
|
|
*/
|
|
function canAnimateThumbnail( $file ) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param File $image
|
|
* @param array &$params
|
|
* @return bool
|
|
*/
|
|
function normaliseParams( $image, &$params ) {
|
|
global $wgSVGMaxSize;
|
|
if ( !parent::normaliseParams( $image, $params ) ) {
|
|
return false;
|
|
}
|
|
# Don't make an image bigger than wgMaxSVGSize on the smaller side
|
|
if ( $params['physicalWidth'] <= $params['physicalHeight'] ) {
|
|
if ( $params['physicalWidth'] > $wgSVGMaxSize ) {
|
|
$srcWidth = $image->getWidth( $params['page'] );
|
|
$srcHeight = $image->getHeight( $params['page'] );
|
|
$params['physicalWidth'] = $wgSVGMaxSize;
|
|
$params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight, $wgSVGMaxSize );
|
|
}
|
|
} else {
|
|
if ( $params['physicalHeight'] > $wgSVGMaxSize ) {
|
|
$srcWidth = $image->getWidth( $params['page'] );
|
|
$srcHeight = $image->getHeight( $params['page'] );
|
|
$params['physicalWidth'] = File::scaleHeight( $srcHeight, $srcWidth, $wgSVGMaxSize );
|
|
$params['physicalHeight'] = $wgSVGMaxSize;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param File $image
|
|
* @param string $dstPath
|
|
* @param string $dstUrl
|
|
* @param array $params
|
|
* @param int $flags
|
|
* @return bool|MediaTransformError|ThumbnailImage|TransformParameterError
|
|
*/
|
|
function doTransform( $image, $dstPath, $dstUrl, $params, $flags = 0 ) {
|
|
if ( !$this->normaliseParams( $image, $params ) ) {
|
|
return new TransformParameterError( $params );
|
|
}
|
|
$clientWidth = $params['width'];
|
|
$clientHeight = $params['height'];
|
|
$physicalWidth = $params['physicalWidth'];
|
|
$physicalHeight = $params['physicalHeight'];
|
|
$lang = isset( $params['lang'] ) ? $params['lang'] : $this->getDefaultRenderLanguage( $image );
|
|
|
|
if ( $flags & self::TRANSFORM_LATER ) {
|
|
return new ThumbnailImage( $image, $dstUrl, $dstPath, $params );
|
|
}
|
|
|
|
$metadata = $this->unpackMetadata( $image->getMetadata() );
|
|
if ( isset( $metadata['error'] ) ) { // sanity check
|
|
$err = wfMessage( 'svg-long-error', $metadata['error']['message'] );
|
|
|
|
return new MediaTransformError( 'thumbnail_error', $clientWidth, $clientHeight, $err );
|
|
}
|
|
|
|
if ( !wfMkdirParents( dirname( $dstPath ), null, __METHOD__ ) ) {
|
|
return new MediaTransformError( 'thumbnail_error', $clientWidth, $clientHeight,
|
|
wfMessage( 'thumbnail_dest_directory' ) );
|
|
}
|
|
|
|
$srcPath = $image->getLocalRefPath();
|
|
if ( $srcPath === false ) { // Failed to get local copy
|
|
wfDebugLog( 'thumbnail',
|
|
sprintf( 'Thumbnail failed on %s: could not get local copy of "%s"',
|
|
wfHostname(), $image->getName() ) );
|
|
|
|
return new MediaTransformError( 'thumbnail_error',
|
|
$params['width'], $params['height'],
|
|
wfMessage( 'filemissing' )
|
|
);
|
|
}
|
|
|
|
// Make a temp dir with a symlink to the local copy in it.
|
|
// This plays well with rsvg-convert policy for external entities.
|
|
// https://git.gnome.org/browse/librsvg/commit/?id=f01aded72c38f0e18bc7ff67dee800e380251c8e
|
|
$tmpDir = wfTempDir() . '/svg_' . wfRandomString( 24 );
|
|
$lnPath = "$tmpDir/" . basename( $srcPath );
|
|
$ok = mkdir( $tmpDir, 0771 );
|
|
if ( !$ok ) {
|
|
wfDebugLog( 'thumbnail',
|
|
sprintf( 'Thumbnail failed on %s: could not create temporary directory %s',
|
|
wfHostname(), $tmpDir ) );
|
|
return new MediaTransformError( 'thumbnail_error',
|
|
$params['width'], $params['height'],
|
|
wfMessage( 'thumbnail-temp-create' )->text()
|
|
);
|
|
}
|
|
$ok = symlink( $srcPath, $lnPath );
|
|
/** @noinspection PhpUnusedLocalVariableInspection */
|
|
$cleaner = new ScopedCallback( function () use ( $tmpDir, $lnPath ) {
|
|
MediaWiki\suppressWarnings();
|
|
unlink( $lnPath );
|
|
rmdir( $tmpDir );
|
|
MediaWiki\restoreWarnings();
|
|
} );
|
|
if ( !$ok ) {
|
|
wfDebugLog( 'thumbnail',
|
|
sprintf( 'Thumbnail failed on %s: could not link %s to %s',
|
|
wfHostname(), $lnPath, $srcPath ) );
|
|
return new MediaTransformError( 'thumbnail_error',
|
|
$params['width'], $params['height'],
|
|
wfMessage( 'thumbnail-temp-create' )
|
|
);
|
|
}
|
|
|
|
$status = $this->rasterize( $lnPath, $dstPath, $physicalWidth, $physicalHeight, $lang );
|
|
if ( $status === true ) {
|
|
return new ThumbnailImage( $image, $dstUrl, $dstPath, $params );
|
|
} else {
|
|
return $status; // MediaTransformError
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Transform an SVG file to PNG
|
|
* This function can be called outside of thumbnail contexts
|
|
* @param string $srcPath
|
|
* @param string $dstPath
|
|
* @param string $width
|
|
* @param string $height
|
|
* @param bool|string $lang Language code of the language to render the SVG in
|
|
* @throws MWException
|
|
* @return bool|MediaTransformError
|
|
*/
|
|
public function rasterize( $srcPath, $dstPath, $width, $height, $lang = false ) {
|
|
global $wgSVGConverters, $wgSVGConverter, $wgSVGConverterPath;
|
|
$err = false;
|
|
$retval = '';
|
|
if ( isset( $wgSVGConverters[$wgSVGConverter] ) ) {
|
|
if ( is_array( $wgSVGConverters[$wgSVGConverter] ) ) {
|
|
// This is a PHP callable
|
|
$func = $wgSVGConverters[$wgSVGConverter][0];
|
|
$args = array_merge( [ $srcPath, $dstPath, $width, $height, $lang ],
|
|
array_slice( $wgSVGConverters[$wgSVGConverter], 1 ) );
|
|
if ( !is_callable( $func ) ) {
|
|
throw new MWException( "$func is not callable" );
|
|
}
|
|
$err = call_user_func_array( $func, $args );
|
|
$retval = (bool)$err;
|
|
} else {
|
|
// External command
|
|
$cmd = str_replace(
|
|
[ '$path/', '$width', '$height', '$input', '$output' ],
|
|
[ $wgSVGConverterPath ? wfEscapeShellArg( "$wgSVGConverterPath/" ) : "",
|
|
intval( $width ),
|
|
intval( $height ),
|
|
wfEscapeShellArg( $srcPath ),
|
|
wfEscapeShellArg( $dstPath ) ],
|
|
$wgSVGConverters[$wgSVGConverter]
|
|
);
|
|
|
|
$env = [];
|
|
if ( $lang !== false ) {
|
|
$env['LANG'] = $lang;
|
|
}
|
|
|
|
wfDebug( __METHOD__ . ": $cmd\n" );
|
|
$err = wfShellExecWithStderr( $cmd, $retval, $env );
|
|
}
|
|
}
|
|
$removed = $this->removeBadFile( $dstPath, $retval );
|
|
if ( $retval != 0 || $removed ) {
|
|
$this->logErrorForExternalProcess( $retval, $err, $cmd );
|
|
return new MediaTransformError( 'thumbnail_error', $width, $height, $err );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public static function rasterizeImagickExt( $srcPath, $dstPath, $width, $height ) {
|
|
$im = new Imagick( $srcPath );
|
|
$im->setImageFormat( 'png' );
|
|
$im->setBackgroundColor( 'transparent' );
|
|
$im->setImageDepth( 8 );
|
|
|
|
if ( !$im->thumbnailImage( intval( $width ), intval( $height ), /* fit */ false ) ) {
|
|
return 'Could not resize image';
|
|
}
|
|
if ( !$im->writeImage( $dstPath ) ) {
|
|
return "Could not write to $dstPath";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param File|FSFile $file
|
|
* @param string $path Unused
|
|
* @param bool|array $metadata
|
|
* @return array
|
|
*/
|
|
function getImageSize( $file, $path, $metadata = false ) {
|
|
if ( $metadata === false && $file instanceof File ) {
|
|
$metadata = $file->getMetadata();
|
|
}
|
|
$metadata = $this->unpackMetadata( $metadata );
|
|
|
|
if ( isset( $metadata['width'] ) && isset( $metadata['height'] ) ) {
|
|
return [ $metadata['width'], $metadata['height'], 'SVG',
|
|
"width=\"{$metadata['width']}\" height=\"{$metadata['height']}\"" ];
|
|
} else { // error
|
|
return [ 0, 0, 'SVG', "width=\"0\" height=\"0\"" ];
|
|
}
|
|
}
|
|
|
|
function getThumbType( $ext, $mime, $params = null ) {
|
|
return [ 'png', 'image/png' ];
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param File $file
|
|
* @return string
|
|
*/
|
|
function getLongDesc( $file ) {
|
|
global $wgLang;
|
|
|
|
$metadata = $this->unpackMetadata( $file->getMetadata() );
|
|
if ( isset( $metadata['error'] ) ) {
|
|
return wfMessage( 'svg-long-error', $metadata['error']['message'] )->text();
|
|
}
|
|
|
|
$size = $wgLang->formatSize( $file->getSize() );
|
|
|
|
if ( $this->isAnimatedImage( $file ) ) {
|
|
$msg = wfMessage( 'svg-long-desc-animated' );
|
|
} else {
|
|
$msg = wfMessage( 'svg-long-desc' );
|
|
}
|
|
|
|
$msg->numParams( $file->getWidth(), $file->getHeight() )->params( $size );
|
|
|
|
return $msg->parse();
|
|
}
|
|
|
|
/**
|
|
* @param File|FSFile $file
|
|
* @param string $filename
|
|
* @return string Serialised metadata
|
|
*/
|
|
function getMetadata( $file, $filename ) {
|
|
$metadata = [ 'version' => self::SVG_METADATA_VERSION ];
|
|
try {
|
|
$metadata += SVGMetadataExtractor::getMetadata( $filename );
|
|
} catch ( Exception $e ) { // @todo SVG specific exceptions
|
|
// File not found, broken, etc.
|
|
$metadata['error'] = [
|
|
'message' => $e->getMessage(),
|
|
'code' => $e->getCode()
|
|
];
|
|
wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
|
|
}
|
|
|
|
return serialize( $metadata );
|
|
}
|
|
|
|
function unpackMetadata( $metadata ) {
|
|
MediaWiki\suppressWarnings();
|
|
$unser = unserialize( $metadata );
|
|
MediaWiki\restoreWarnings();
|
|
if ( isset( $unser['version'] ) && $unser['version'] == self::SVG_METADATA_VERSION ) {
|
|
return $unser;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function getMetadataType( $image ) {
|
|
return 'parsed-svg';
|
|
}
|
|
|
|
function isMetadataValid( $image, $metadata ) {
|
|
$meta = $this->unpackMetadata( $metadata );
|
|
if ( $meta === false ) {
|
|
return self::METADATA_BAD;
|
|
}
|
|
if ( !isset( $meta['originalWidth'] ) ) {
|
|
// Old but compatible
|
|
return self::METADATA_COMPATIBLE;
|
|
}
|
|
|
|
return self::METADATA_GOOD;
|
|
}
|
|
|
|
protected function visibleMetadataFields() {
|
|
$fields = [ 'objectname', 'imagedescription' ];
|
|
|
|
return $fields;
|
|
}
|
|
|
|
/**
|
|
* @param File $file
|
|
* @param bool|IContextSource $context Context to use (optional)
|
|
* @return array|bool
|
|
*/
|
|
function formatMetadata( $file, $context = false ) {
|
|
$result = [
|
|
'visible' => [],
|
|
'collapsed' => []
|
|
];
|
|
$metadata = $file->getMetadata();
|
|
if ( !$metadata ) {
|
|
return false;
|
|
}
|
|
$metadata = $this->unpackMetadata( $metadata );
|
|
if ( !$metadata || isset( $metadata['error'] ) ) {
|
|
return false;
|
|
}
|
|
|
|
/* @todo Add a formatter
|
|
$format = new FormatSVG( $metadata );
|
|
$formatted = $format->getFormattedData();
|
|
*/
|
|
|
|
// Sort fields into visible and collapsed
|
|
$visibleFields = $this->visibleMetadataFields();
|
|
|
|
$showMeta = false;
|
|
foreach ( $metadata as $name => $value ) {
|
|
$tag = strtolower( $name );
|
|
if ( isset( self::$metaConversion[$tag] ) ) {
|
|
$tag = strtolower( self::$metaConversion[$tag] );
|
|
} else {
|
|
// Do not output other metadata not in list
|
|
continue;
|
|
}
|
|
$showMeta = true;
|
|
self::addMeta( $result,
|
|
in_array( $tag, $visibleFields ) ? 'visible' : 'collapsed',
|
|
'exif',
|
|
$tag,
|
|
$value
|
|
);
|
|
}
|
|
|
|
return $showMeta ? $result : false;
|
|
}
|
|
|
|
/**
|
|
* @param string $name Parameter name
|
|
* @param mixed $value Parameter value
|
|
* @return bool Validity
|
|
*/
|
|
public function validateParam( $name, $value ) {
|
|
if ( in_array( $name, [ 'width', 'height' ] ) ) {
|
|
// Reject negative heights, widths
|
|
return ( $value > 0 );
|
|
} elseif ( $name == 'lang' ) {
|
|
// Validate $code
|
|
if ( $value === '' || !Language::isValidBuiltInCode( $value ) ) {
|
|
wfDebug( "Invalid user language code\n" );
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Only lang, width and height are acceptable keys
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param array $params Name=>value pairs of parameters
|
|
* @return string Filename to use
|
|
*/
|
|
public function makeParamString( $params ) {
|
|
$lang = '';
|
|
if ( isset( $params['lang'] ) && $params['lang'] !== 'en' ) {
|
|
$params['lang'] = strtolower( $params['lang'] );
|
|
$lang = "lang{$params['lang']}-";
|
|
}
|
|
if ( !isset( $params['width'] ) ) {
|
|
return false;
|
|
}
|
|
|
|
return "$lang{$params['width']}px";
|
|
}
|
|
|
|
public function parseParamString( $str ) {
|
|
$m = false;
|
|
if ( preg_match( '/^lang([a-z]+(?:-[a-z]+)*)-(\d+)px$/', $str, $m ) ) {
|
|
return [ 'width' => array_pop( $m ), 'lang' => $m[1] ];
|
|
} elseif ( preg_match( '/^(\d+)px$/', $str, $m ) ) {
|
|
return [ 'width' => $m[1], 'lang' => 'en' ];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function getParamMap() {
|
|
return [ 'img_lang' => 'lang', 'img_width' => 'width' ];
|
|
}
|
|
|
|
/**
|
|
* @param array $params
|
|
* @return array
|
|
*/
|
|
function getScriptParams( $params ) {
|
|
$scriptParams = [ 'width' => $params['width'] ];
|
|
if ( isset( $params['lang'] ) ) {
|
|
$scriptParams['lang'] = $params['lang'];
|
|
}
|
|
|
|
return $scriptParams;
|
|
}
|
|
|
|
public function getCommonMetaArray( File $file ) {
|
|
$metadata = $file->getMetadata();
|
|
if ( !$metadata ) {
|
|
return [];
|
|
}
|
|
$metadata = $this->unpackMetadata( $metadata );
|
|
if ( !$metadata || isset( $metadata['error'] ) ) {
|
|
return [];
|
|
}
|
|
$stdMetadata = [];
|
|
foreach ( $metadata as $name => $value ) {
|
|
$tag = strtolower( $name );
|
|
if ( $tag === 'originalwidth' || $tag === 'originalheight' ) {
|
|
// Skip these. In the exif metadata stuff, it is assumed these
|
|
// are measured in px, which is not the case here.
|
|
continue;
|
|
}
|
|
if ( isset( self::$metaConversion[$tag] ) ) {
|
|
$tag = self::$metaConversion[$tag];
|
|
$stdMetadata[$tag] = $value;
|
|
}
|
|
}
|
|
|
|
return $stdMetadata;
|
|
}
|
|
}
|