implement server side use of previews

apps/files/templates/part.list.php

@@ -1,6 +1,7 @@
 <input type="hidden" id="disableSharing" data-status="<?php p($_['disableSharing']); ?>">
 
 <?php foreach($_['files'] as $file):
+	$relativePath = substr($file['path'], 6);
 	$simple_file_size = OCP\simple_file_size($file['size']);
 	// the bigger the file, the darker the shade of grey; megabytes*2
 	$simple_size_color = intval(160-$file['size']/(1024*1024)*2);
@@ -23,7 +24,7 @@
 		<?php if($file['type'] == 'dir'): ?>
 			style="background-image:url(<?php print_unescaped(OCP\mimetype_icon('dir')); ?>)"
 		<?php else: ?>
-			style="background-image:url(<?php print_unescaped(OCP\mimetype_icon($file['mimetype'])); ?>)"
+			style="background-image:url(<?php print_unescaped(OCP\preview_icon($relativePath)); ?>)"
 		<?php endif; ?>
 			>
 		<?php if(!isset($_['readonly']) || !$_['readonly']): ?><input type="checkbox" /><?php endif; ?>

lib/helper.php

@@ -223,6 +223,17 @@ class OC_Helper {
 		}
 	}
 
+	/**
+	 * @brief get path to preview of file
+	 * @param string $path path
+	 * @return string the url
+	 *
+	 * Returns the path to the preview of the file.
+	 */
+	public static function previewIcon($path) {
+		return self::linkToRoute( 'core_ajax_preview', array('x' => 32, 'y' => 32, 'file' => $path));
+	}
+
 	/**
 	 * @brief Make a human file size
 	 * @param int $bytes file size in bytes

lib/public/template.php

@@ -54,6 +54,15 @@ function mimetype_icon( $mimetype ) {
 	return(\mimetype_icon( $mimetype ));
 }
 
+/**
+ * @brief make preview_icon available as a simple function
+ * Returns the path to the preview of the image.
+ * @param $path path of file
+ * @returns link to the preview
+ */
+function preview_icon( $path ) {
+	return(\preview_icon( $path ));
+}
 
 /**
  * @brief make OC_Helper::humanFileSize available as a simple function

lib/template.php

@@ -62,6 +62,18 @@ function image_path( $app, $image ) {
 	return OC_Helper::imagePath( $app, $image );
 }
 
+/**
+ * @brief make preview_icon available as a simple function
+ * Returns the path to the preview of the image.
+ * @param $path path of file
+ * @returns link to the preview
+ *
+ * For further information have a look at OC_Helper::previewIcon
+ */
+function preview_icon( $path ) {
+	return OC_Helper::previewIcon( $path );
+}
+
 /**
  * @brief make OC_Helper::mimetypeIcon available as a simple function
  * @param string $mimetype mimetype