128 lines
2.8 KiB
PHP
128 lines
2.8 KiB
PHP
<?php
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/**
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* Handler for PNG images.
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*
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* @file
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* @ingroup Media
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*/
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/**
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* Handler for PNG images.
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*
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* @ingroup Media
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*/
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class PNGHandler extends BitmapHandler {
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const BROKEN_FILE = '0';
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/**
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* @param File $image
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* @param string $filename
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* @return string
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*/
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function getMetadata( $image, $filename ) {
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try {
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$metadata = BitmapMetadataHandler::PNG( $filename );
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} catch( Exception $e ) {
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// Broken file?
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wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
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return self::BROKEN_FILE;
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}
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return serialize($metadata);
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}
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function formatMetadata( $image ) {
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$meta = $image->getMetadata();
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if ( !$meta ) {
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return false;
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}
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$meta = unserialize( $meta );
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if ( !isset( $meta['metadata'] ) || count( $meta['metadata'] ) <= 1 ) {
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return false;
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}
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if ( isset( $meta['metadata']['_MW_PNG_VERSION'] ) ) {
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unset( $meta['metadata']['_MW_PNG_VERSION'] );
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}
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return $this->formatMetadataHelper( $meta['metadata'] );
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}
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/**
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* @param $image File
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* @return bool
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*/
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function isAnimatedImage( $image ) {
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$ser = $image->getMetadata();
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if ($ser) {
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$metadata = unserialize($ser);
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if( $metadata['frameCount'] > 1 ) return true;
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}
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return false;
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}
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function getMetadataType( $image ) {
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return 'parsed-png';
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}
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function isMetadataValid( $image, $metadata ) {
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if ( $metadata === self::BROKEN_FILE ) {
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// Do not repetitivly regenerate metadata on broken file.
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return self::METADATA_GOOD;
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}
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wfSuppressWarnings();
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$data = unserialize( $metadata );
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wfRestoreWarnings();
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if ( !$data || !is_array( $data ) ) {
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wfDebug(__METHOD__ . ' invalid png metadata' );
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return self::METADATA_BAD;
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}
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if ( !isset( $data['metadata']['_MW_PNG_VERSION'] )
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|| $data['metadata']['_MW_PNG_VERSION'] != PNGMetadataExtractor::VERSION ) {
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wfDebug(__METHOD__ . ' old but compatible png metadata' );
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return self::METADATA_COMPATIBLE;
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}
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return self::METADATA_GOOD;
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}
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/**
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* @param $image File
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* @return string
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*/
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function getLongDesc( $image ) {
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global $wgLang;
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$original = parent::getLongDesc( $image );
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wfSuppressWarnings();
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$metadata = unserialize($image->getMetadata());
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wfRestoreWarnings();
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if( !$metadata || $metadata['frameCount'] <= 0 )
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return $original;
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$info = array();
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$info[] = $original;
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if ( $metadata['loopCount'] == 0 ) {
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$info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
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} elseif ( $metadata['loopCount'] > 1 ) {
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$info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );
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}
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if ( $metadata['frameCount'] > 0 ) {
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$info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
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}
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if ( $metadata['duration'] ) {
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$info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
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}
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return $wgLang->commaList( $info );
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}
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}
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