Файловый менеджер - Редактировать - /var/www/html/mediawiki-1.43.1/includes/media/DjVuHandler.php
Ðазад
<?php /** * Handler for DjVu 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 MediaWiki\MainConfigNames; use MediaWiki\MediaWikiServices; use MediaWiki\PoolCounter\PoolCounterWorkViaCallback; use MediaWiki\Shell\Shell; /** * Handler for DjVu images * * @ingroup Media */ class DjVuHandler extends ImageHandler { private const EXPENSIVE_SIZE_LIMIT = 10_485_760; // 10MiB // Constants for getHandlerState private const STATE_DJVU_IMAGE = 'djvuImage'; private const STATE_TEXT_TREE = 'djvuTextTree'; private const STATE_META_TREE = 'djvuMetaTree'; private const CACHE_VERSION = 'v2'; /** * @return bool */ public function isEnabled() { $djvuRenderer = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::DjvuRenderer ); $djvuDump = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::DjvuDump ); if ( !$djvuRenderer || !$djvuDump ) { wfDebug( "DjVu is disabled, please set \$wgDjvuRenderer and \$wgDjvuDump" ); return false; } return true; } /** * @param File $file * @return bool */ public function mustRender( $file ) { return true; } /** * True if creating thumbnails from the file is large or otherwise resource-intensive. * @param File $file * @return bool */ public function isExpensiveToThumbnail( $file ) { return $file->getSize() > static::EXPENSIVE_SIZE_LIMIT; } /** * @param File $file * @return bool */ public function isMultiPage( $file ) { return true; } /** * @return array */ public function getParamMap() { return [ 'img_width' => 'width', 'img_page' => 'page', ]; } /** * @param string $name * @param mixed $value * @return bool */ public function validateParam( $name, $value ) { if ( $name === 'page' && trim( $value ) !== (string)intval( $value ) ) { // Extra junk on the end of page, probably actually a caption // e.g. [[File:Foo.djvu|thumb|Page 3 of the document shows foo]] return false; } return in_array( $name, [ 'width', 'height', 'page' ] ) && $value > 0; } /** * @param array $params * @return string|false */ public function makeParamString( $params ) { $page = $params['page'] ?? 1; if ( !isset( $params['width'] ) ) { return false; } return "page{$page}-{$params['width']}px"; } /** * @param string $str * @return array|false */ public function parseParamString( $str ) { $m = false; if ( preg_match( '/^page(\d+)-(\d+)px$/', $str, $m ) ) { return [ 'width' => $m[2], 'page' => $m[1] ]; } return false; } /** * @param array $params * @return array */ protected function getScriptParams( $params ) { return [ 'width' => $params['width'], 'page' => $params['page'], ]; } /** * @param File $image * @param string $dstPath * @param string $dstUrl * @param array $params * @param int $flags * @return MediaTransformError|ThumbnailImage|TransformParameterError */ public function doTransform( $image, $dstPath, $dstUrl, $params, $flags = 0 ) { $djvuRenderer = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::DjvuRenderer ); $djvuPostProcessor = MediaWikiServices::getInstance()->getMainConfig() ->get( MainConfigNames::DjvuPostProcessor ); if ( !$this->normaliseParams( $image, $params ) ) { return new TransformParameterError( $params ); } $width = $params['width']; $height = $params['height']; $page = $params['page']; if ( $flags & self::TRANSFORM_LATER ) { $params = [ 'width' => $width, 'height' => $height, 'page' => $page ]; return new ThumbnailImage( $image, $dstUrl, $dstPath, $params ); } if ( !wfMkdirParents( dirname( $dstPath ), null, __METHOD__ ) ) { return new MediaTransformError( 'thumbnail_error', $width, $height, wfMessage( 'thumbnail_dest_directory' ) ); } // Get local copy source for shell scripts // Thumbnail extraction is very inefficient for large files. // Provide a way to pool count limit the number of downloaders. if ( $image->getSize() >= 1e7 ) { // 10 MB $work = new PoolCounterWorkViaCallback( 'GetLocalFileCopy', sha1( $image->getName() ), [ 'doWork' => static function () use ( $image ) { return $image->getLocalRefPath(); } ] ); $srcPath = $work->execute(); } else { $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' ) ); } # Use a subshell (brackets) to aggregate stderr from both pipeline commands # before redirecting it to the overall stdout. This works in both Linux and Windows XP. $cmd = '(' . Shell::escape( $djvuRenderer, "-format=ppm", "-page={$page}", "-size={$params['physicalWidth']}x{$params['physicalHeight']}", $srcPath ); if ( $djvuPostProcessor ) { $cmd .= " | {$djvuPostProcessor}"; } $cmd .= ' > ' . Shell::escape( $dstPath ) . ') 2>&1'; wfDebug( __METHOD__ . ": $cmd" ); $retval = 0; $err = wfShellExec( $cmd, $retval ); $removed = $this->removeBadFile( $dstPath, $retval ); if ( $retval !== 0 || $removed ) { $this->logErrorForExternalProcess( $retval, $err, $cmd ); return new MediaTransformError( 'thumbnail_error', $width, $height, $err ); } $params = [ 'width' => $width, 'height' => $height, 'page' => $page ]; return new ThumbnailImage( $image, $dstUrl, $dstPath, $params ); } /** * Cache an instance of DjVuImage in a MediaHandlerState object, return * that instance * * @param MediaHandlerState $state * @param string $path * @return DjVuImage */ private function getDjVuImage( $state, $path ) { $deja = $state->getHandlerState( self::STATE_DJVU_IMAGE ); if ( !$deja ) { $deja = new DjVuImage( $path ); $state->setHandlerState( self::STATE_DJVU_IMAGE, $deja ); } return $deja; } /** * Get metadata, unserializing it if necessary. * * @param File $file The DjVu file in question * @param bool $gettext * @return string|false|array metadata */ private function getMetadataInternal( File $file, $gettext ) { $itemNames = [ 'error', '_error', 'data' ]; if ( $gettext ) { $itemNames[] = 'text'; } $unser = $file->getMetadataItems( $itemNames ); if ( isset( $unser['error'] ) ) { return false; } if ( isset( $unser['_error'] ) ) { return false; } return $unser; } /** * Cache a document tree for the DjVu metadata * @param File $image * @param bool $gettext DOCUMENT (Default: false) * @return false|array */ public function getMetaTree( $image, $gettext = false ) { if ( $gettext && $image->getHandlerState( self::STATE_TEXT_TREE ) ) { return $image->getHandlerState( self::STATE_TEXT_TREE ); } if ( !$gettext && $image->getHandlerState( self::STATE_META_TREE ) ) { return $image->getHandlerState( self::STATE_META_TREE ); } $metadata = $this->getMetadataInternal( $image, $gettext ); if ( !$metadata ) { return false; } if ( !$gettext ) { unset( $metadata['text'] ); } return $metadata; } public function getThumbType( $ext, $mime, $params = null ) { $djvuOutputExtension = MediaWikiServices::getInstance()->getMainConfig() ->get( MainConfigNames::DjvuOutputExtension ); static $mime; if ( !isset( $mime ) ) { $magic = MediaWikiServices::getInstance()->getMimeAnalyzer(); $mime = $magic->getMimeTypeFromExtensionOrNull( $djvuOutputExtension ); } return [ $djvuOutputExtension, $mime ]; } public function getSizeAndMetadata( $state, $path ) { wfDebug( "Getting DjVu metadata for $path" ); $djvuImage = $this->getDjVuImage( $state, $path ); $metadata = $djvuImage->retrieveMetaData(); if ( $metadata === false ) { // Special value so that we don't repetitively try and decode a broken file. $metadata = [ 'error' => 'Error extracting metadata' ]; } return [ 'metadata' => $metadata ] + $djvuImage->getImageSize(); } public function getMetadataType( $image ) { // historical reasons return 'djvuxml'; } public function isFileMetadataValid( $image ) { return $image->getMetadataArray() ? self::METADATA_GOOD : self::METADATA_BAD; } public function pageCount( File $image ) { $info = $this->getDimensionInfo( $image ); return $info ? $info['pageCount'] : false; } public function getPageDimensions( File $image, $page ) { $index = $page - 1; // MW starts pages at 1 $info = $this->getDimensionInfo( $image ); if ( $info && isset( $info['dimensionsByPage'][$index] ) ) { return $info['dimensionsByPage'][$index]; } return false; } protected function getDimensionInfo( File $file ) { $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); return $cache->getWithSetCallback( $cache->makeKey( 'file-djvu', 'dimensions', self::CACHE_VERSION, $file->getSha1() ), $cache::TTL_INDEFINITE, function () use ( $file ) { $tree = $this->getMetaTree( $file ); return $this->getDimensionInfoFromMetaTree( $tree ); }, [ 'pcTTL' => $cache::TTL_INDEFINITE ] ); } /** * Given the metadata, returns dimension information about the document * @param false|array $metatree The file's metadata tree * @return array|false */ protected function getDimensionInfoFromMetaTree( $metatree ) { if ( !$metatree ) { return false; } $dimsByPage = []; if ( !isset( $metatree['data'] ) || !$metatree['data'] ) { return false; } foreach ( $metatree['data']['pages'] as $page ) { if ( !$page ) { $dimsByPage[] = false; } else { $dimsByPage[] = [ 'width' => (int)$page['width'], 'height' => (int)$page['height'], ]; } } return [ 'pageCount' => count( $metatree['data']['pages'] ), 'dimensionsByPage' => $dimsByPage ]; } /** * @param File $image * @param int $page Page number to get information for * @return string|false Page text or false when no text found. */ public function getPageText( File $image, $page ) { $tree = $this->getMetaTree( $image, true ); if ( !$tree ) { return false; } if ( isset( $tree['text'] ) && isset( $tree['text'][$page - 1] ) ) { return $tree['text'][$page - 1]; } return false; } public function useSplitMetadata() { return true; } }
| ver. 1.1 | |
.
| PHP 8.4.18 | Ð“ÐµÐ½ÐµÑ€Ð°Ñ†Ð¸Ñ Ñтраницы: 0 |
proxy
|
phpinfo
|
ÐаÑтройка