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Path: /data/applications/aps/gallery/2.2-08/htdocs/modules/thumbnail/classes/ [ Home ]
File: ThumbnailToolkit.class
<?php
/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2007 Bharat Mediratta
 *
 * 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.
 */

GalleryCoreApi::requireOnce('modules/core/classes/GalleryToolkit.class');

/**
 * A version of GalleryToolkit to supply default thumbnail images for non-image mime types.
 * @package Thumbnail
 * @subpackage Classes
 * @author Alan Harder <alan.harder@sun.com>
 * @version $Revision: 15513 $
 */
class ThumbnailToolkit extends GalleryToolkit {

    /**
     * @see GalleryToolkit::getProperty
     */
    function getProperty($mimeType, $propertyName, $sourceFilename) {
	return array(GalleryCoreApi::error(ERROR_UNIMPLEMENTED), null);
    }

    /**
     * @see GalleryToolkit::performOperation
     */
    function performOperation($mimeType, $operationName, $sourceFilename,
			      $destFilename, $parameters, $context=array()) {
	GalleryCoreApi::requireOnce('modules/thumbnail/classes/ThumbnailHelper.class');
	global $gallery;
	$platform =& $gallery->getPlatform();

	list ($ret, $mimeTypeMap) = ThumbnailHelper::fetchMimeTypeMap();
	if ($ret) {
	    return array($ret, null, null);
	}
	if (!isset($mimeTypeMap[$mimeType]) || $operationName != 'thumbnail') {
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION, __FILE__, __LINE__,
					       "$operationName $mimeType"), null, null);
	}
	list ($ret, $thumbImage) = GalleryCoreApi::loadEntitiesById($mimeTypeMap[$mimeType]);
	if ($ret) {
	    return array($ret, null, null);
	}
	list ($ret, $thumbPath) = $thumbImage->fetchPath();
	if ($ret) {
	    return array($ret, null, null);
	}

	$mimeType = 'image/jpeg';
	$success = $platform->copy($thumbPath, $destFilename);
	if (!$success) {
	    return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE, __FILE__, __LINE__,
			 "Failed copying $thumbPath -> $destFilename"), null, null);
	}
	$context['width'] = $thumbImage->getWidth();
	$context['height'] = $thumbImage->getHeight();

	/* Now get toolkit to resize image to thumbnail size */
	list ($ret, $toolkit) = GalleryCoreApi::getToolkitByOperation($mimeType, 'thumbnail');
	if ($ret) {
	    return array($ret, null, null);
	}
	if (!isset($toolkit) || get_class($toolkit) == get_class($this)) {
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION, __FILE__, __LINE__,
					       "thumbnail $mimeType"), null, null);
	}
	list ($ret, $mimeType, $context) =
	    $toolkit->performOperation($mimeType, 'thumbnail', $destFilename, $destFilename,
				       $parameters, $context);
	if ($ret) {
	    return array($ret, null, null);
	}

	return array(null, $mimeType, $context);
    }
}
?>