- adding class to header div: share-folder or share-file

- for supported previews are shown with a size of 500px; icons with a size of 128px

apps/files_sharing/templates/public.php

@@ -9,7 +9,7 @@
 <input type="hidden" name="sharingToken" value="<?php p($_['sharingToken']) ?>" id="sharingToken">
 <input type="hidden" name="filename" value="<?php p($_['filename']) ?>" id="filename">
 <input type="hidden" name="mimetype" value="<?php p($_['mimetype']) ?>" id="mimetype">
-<header><div id="header" class="icon icon-noise">
+<header><div id="header" class="icon icon-noise <?php p((isset($_['folder']) ? 'share-folder' : 'share-file')) ?>">
 		<a href="<?php print_unescaped(link_to('', 'index.php')); ?>" title="" id="owncloud"><img class="svg"
 		                                                                                          src="<?php print_unescaped(image_path('', 'logo-wide.svg')); ?>" alt="<?php p($theme->getName()); ?>" /></a>
 		<div id="logo-claim" style="display:none;"><?php p($theme->getLogoClaim()); ?></div>
@@ -34,7 +34,8 @@
 				</div>
 			<?php else: ?>
 				<div id="imgframe">
-					<img src="<?php p(OCP\Util::linkToRoute( 'core_ajax_public_preview', array('x' => 128, 'y' => 128, 'file' => urlencode($_['directory_path']), 't' => $_['dirToken']))); ?>" class="publicpreview"/>
+					<?php $size = \OC\Preview::isMimeSupported($_['mimetype']) ? 500 : 128 ?>
+					<img src="<?php p(OCP\Util::linkToRoute( 'core_ajax_public_preview', array('x' => $size, 'y' => $size, 'file' => urlencode($_['directory_path']), 't' => $_['dirToken']))); ?>" class="publicpreview"/>
 				</div>
 			<?php endif; ?>
 			<div class="directDownload">