<?php
/**
+ * Handler for GIF 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
*/
* @ingroup Media
*/
class GIFHandler extends BitmapHandler {
-
+
+ const BROKEN_FILE = '0'; // value to store in img_metadata if error extracting metadata.
+
function getMetadata( $image, $filename ) {
- if ( !isset($image->parsedGIFMetadata) ) {
- try {
- $image->parsedGIFMetadata = GIFMetadataExtractor::getMetadata( $filename );
- } catch( Exception $e ) {
- // Broken file?
- wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
- return '0';
- }
+ try {
+ $parsedGIFMetadata = BitmapMetadataHandler::GIF( $filename );
+ } catch( Exception $e ) {
+ // Broken file?
+ wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
+ return self::BROKEN_FILE;
}
- return serialize($image->parsedGIFMetadata);
-
+ return serialize($parsedGIFMetadata);
}
-
+
+ /**
+ * @param $image File
+ * @return array|bool
+ */
function formatMetadata( $image ) {
- return false;
+ $meta = $image->getMetadata();
+
+ if ( !$meta ) {
+ return false;
+ }
+ $meta = unserialize( $meta );
+ if ( !isset( $meta['metadata'] ) || count( $meta['metadata'] ) <= 1 ) {
+ return false;
+ }
+
+ if ( isset( $meta['metadata']['_MW_GIF_VERSION'] ) ) {
+ unset( $meta['metadata']['_MW_GIF_VERSION'] );
+ }
+ return $this->formatMetadataHelper( $meta['metadata'] );
}
-
- function getImageArea( $image, $width, $height ) {
+
+ /**
+ * @param $image File
+ * @todo unittests
+ * @return bool
+ */
+ function getImageArea( $image ) {
$ser = $image->getMetadata();
- if ($ser) {
- $metadata = unserialize($ser);
- return $width * $height * $metadata['frameCount'];
+ if ( $ser ) {
+ $metadata = unserialize( $ser );
+ return $image->getWidth() * $image->getHeight() * $metadata['frameCount'];
} else {
- return $width * $height;
+ return $image->getWidth() * $image->getHeight();
+ }
+ }
+
+ /**
+ * @param $image File
+ * @return bool
+ */
+ function isAnimatedImage( $image ) {
+ $ser = $image->getMetadata();
+ if ( $ser ) {
+ $metadata = unserialize($ser);
+ if( $metadata['frameCount'] > 1 ) {
+ return true;
+ }
}
+ return false;
}
-
+
+ /**
+ * We cannot animate thumbnails that are bigger than a particular size
+ * @param File $file
+ * @return bool
+ */
+ function canAnimateThumbnail( $file ) {
+ global $wgMaxAnimatedGifArea;
+ $answer = $this->getImageArea( $file ) <= $wgMaxAnimatedGifArea;
+ return $answer;
+ }
+
function getMetadataType( $image ) {
return 'parsed-gif';
}
-
+
+ function isMetadataValid( $image, $metadata ) {
+ if ( $metadata === self::BROKEN_FILE ) {
+ // Do not repetitivly regenerate metadata on broken file.
+ return self::METADATA_GOOD;
+ }
+
+ wfSuppressWarnings();
+ $data = unserialize( $metadata );
+ wfRestoreWarnings();
+
+ if ( !$data || !is_array( $data ) ) {
+ wfDebug(__METHOD__ . ' invalid GIF metadata' );
+ return self::METADATA_BAD;
+ }
+
+ if ( !isset( $data['metadata']['_MW_GIF_VERSION'] )
+ || $data['metadata']['_MW_GIF_VERSION'] != GIFMetadataExtractor::VERSION ) {
+ wfDebug(__METHOD__ . ' old but compatible GIF metadata' );
+ return self::METADATA_COMPATIBLE;
+ }
+ return self::METADATA_GOOD;
+ }
+
+ /**
+ * @param $image File
+ * @return string
+ */
function getLongDesc( $image ) {
- global $wgUser, $wgLang;
- $sk = $wgUser->getSkin();
-
- $metadata = @unserialize($image->getMetadata());
-
- if (!$metadata) return parent::getLongDesc( $image );
-
+ global $wgLang;
+
+ $original = parent::getLongDesc( $image );
+
+ wfSuppressWarnings();
+ $metadata = unserialize($image->getMetadata());
+ wfRestoreWarnings();
+
+ if (!$metadata || $metadata['frameCount'] <= 1) {
+ return $original;
+ }
+
+ /* Preserve original image info string, but strip the last char ')' so we can add even more */
$info = array();
- $info[] = $image->getMimeType();
- $info[] = $sk->formatSize( $image->getSize() );
-
- if ($metadata['looped'])
- $info[] = wfMsgExt( 'file-info-gif-looped', 'parseinline' );
-
- if ($metadata['frameCount'] > 1)
- $info[] = wfMsgExt( 'file-info-gif-frames', 'parseinline', $metadata['frameCount'] );
-
- if ($metadata['duration'])
+ $info[] = $original;
+
+ if ( $metadata['looped'] ) {
+ $info[] = wfMessage( 'file-info-gif-looped' )->parse();
+ }
+
+ if ( $metadata['frameCount'] > 1 ) {
+ $info[] = wfMessage( 'file-info-gif-frames' )->numParams( $metadata['frameCount'] )->parse();
+ }
+
+ if ( $metadata['duration'] ) {
$info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
-
- $infoString = $wgLang->commaList( $info );
-
- return "($infoString)";
+ }
+
+ return $wgLang->commaList( $info );
}
}
dépôts / lhc / web / wiklou.git / blobdiff