Index: branches/5.2.x/core/ckeditor/plugins/my_document/dialogs/document.js
===================================================================
diff -u -N -r15042 -r16526
--- branches/5.2.x/core/ckeditor/plugins/my_document/dialogs/document.js	(.../document.js)	(revision 15042)
+++ branches/5.2.x/core/ckeditor/plugins/my_document/dialogs/document.js	(.../document.js)	(revision 16526)
@@ -18,7 +18,18 @@
 			}
 		};
 
+		var makeRelativeUrl = function ($url) {
+			if ( $url.indexOf(':/') == -1 && path.slice(0, 2) != '//' ) {
+				return $url;
+			}
 
+			var $link = document.createElement('a');
+
+			$link.href = $url;
+
+			return $link.pathname;
+		};
+
 		var parseLink = function( editor ) {
 			var retval = {
 					documentUrl: '',
@@ -343,7 +354,7 @@
 				this.commitContent( data );
 
 				var $filename = data.documentUrl.slice(data.documentUrl.lastIndexOf('\/') + 1);
-				var $icon_url = CKEDITOR.basePath.split('/');
+				var $icon_url = makeRelativeUrl(CKEDITOR.basePath).split('/');
 
 				$icon_url.splice($icon_url.length - 3); // remove "/core/ckeditor/"
 				$icon_url = $icon_url.join('/') + editor.config.documentIconsUrl;
@@ -371,4 +382,4 @@
 
 		};
 	}
-);
\ No newline at end of file
+);