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<?php
class CreatePdfThumbnailsJob extends Job {
/**
* Flags for thumbnail jobs
*/
const BIG_THUMB = 1;
const SMALL_THUMB = 2;
/**
* Construct a thumbnail job
*
* @param Title $title Title object
* @param array $params Associative array of options:
* page: page number for which the thumbnail will be created
* jobtype: CreatePDFThumbnailsJob::BIG_THUMB or CreatePDFThumbnailsJob::SMALL_THUMB
* BIG_THUMB will create a thumbnail visible for full thumbnail view,
* SMALL_THUMB will create a thumbnail shown in "previous page"/"next page" boxes
*/
public function __construct( $title, $params ) {
parent::__construct( 'createPdfThumbnailsJob', $title, $params );
}
/**
* Run a thumbnail job on a given PDF file.
* @return bool true
*/
public function run() {
if ( !isset( $this->params['page'] ) ) {
wfDebugLog( 'thumbnails', 'A page for thumbnails job of ' . $this->title->getText() .
' was not specified! That should never happen!' );
return true; // no page set? that should never happen
}
$file = wfLocalFile( $this->title ); // we just want a local file
if ( !$file ) {
return true; // Just silently fail, perhaps the file was already deleted, don't bother
}
switch ( $this->params['jobtype'] ) {
case self::BIG_THUMB:
global $wgImageLimits;
// Ignore user preferences, do default thumbnails
// everything here shamelessy copied and reused from includes/ImagePage.php
$sizeSel = User::getDefaultOption( 'imagesize' );
// The user offset might still be incorrect, specially if
// $wgImageLimits got changed (see bug #8858).
if ( !isset( $wgImageLimits[$sizeSel] ) ) {
// Default to the first offset in $wgImageLimits
$sizeSel = 0;
}
$max = $wgImageLimits[$sizeSel];
$maxWidth = $max[0];
$maxHeight = $max[1];
$width_orig = $file->getWidth( $this->params['page'] );
$width = $width_orig;
$height_orig = $file->getHeight( $this->params['page'] );
$height = $height_orig;
if ( $width > $maxWidth || $height > $maxHeight ) {
// Calculate the thumbnail size.
// First case, the limiting factor is the width, not the height.
if ( $width / $height >= $maxWidth / $maxHeight ) {
// $height = round( $height * $maxWidth / $width );
$width = $maxWidth;
// Note that $height <= $maxHeight now.
} else {
$newwidth = floor( $width * $maxHeight / $height );
// $height = round( $height * $newwidth / $width );
$width = $newwidth;
// Note that $height <= $maxHeight now, but might not be identical
// because of rounding.
}
$transformParams = [ 'page' => $this->params['page'], 'width' => $width ];
$file->transform( $transformParams );
}
break;
case self::SMALL_THUMB:
Linker::makeThumbLinkObj( $this->title, $file, '', '', 'none',
[ 'page' => $this->params['page'] ] );
break;
}
return true;
}
/**
* @param UploadBase $upload
* @param string $mime
* @param string &$error
* @return bool
*/
public static function insertJobs( $upload, $mime, &$error ) {
global $wgPdfCreateThumbnailsInJobQueue;
if ( !$wgPdfCreateThumbnailsInJobQueue ) {
return true;
}
$magic = MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer();
if ( !$magic->isMatchingExtension( 'pdf', $mime ) ) {
return true; // not a PDF, abort
}
$title = $upload->getTitle();
$uploadFile = $upload->getLocalFile();
if ( is_null( $uploadFile ) ) {
wfDebugLog( 'thumbnails', '$uploadFile seems to be null, should never happen...' );
return true; // should never happen, but it's better to be secure
}
$metadata = $uploadFile->getMetadata();
$unserialized = unserialize( $metadata );
$pages = intval( $unserialized['Pages'] );
$jobs = [];
for ( $i = 1; $i <= $pages; $i++ ) {
$jobs[] = new CreatePdfThumbnailsJob(
$title,
[ 'page' => $i, 'jobtype' => self::BIG_THUMB ]
);
$jobs[] = new CreatePdfThumbnailsJob(
$title,
[ 'page' => $i, 'jobtype' => self::SMALL_THUMB ]
);
}
JobQueueGroup::singleton()->push( $jobs );
return true;
}
}
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