ChangesList: Expose basic properties of lines as data attributes

[lhc/web/wiklou.git] / includes / Sanitizer.php

diff --git a/includes/Sanitizer.php b/includes/Sanitizer.php
index c4883ba..5aaa3ed 100644 (file)
--- a/includes/Sanitizer.php
+++ b/includes/Sanitizer.php
@@ -782,15 +782,12 @@ class Sanitizer {
 
                        # Allow any attribute beginning with "data-"
                        # However:
-                       # * data-ooui is reserved for ooui
-                       # * data-mw and data-parsoid are reserved for parsoid
-                       # * data-mw-<name here> is reserved for extensions (or core) if
-                       #   they need to communicate some data to the client and want to be
-                       #   sure that it isn't coming from an untrusted user.
+                       # * Disallow data attributes used by MediaWiki code
                        # * Ensure that the attribute is not namespaced by banning
                        #   colons.
-                       if ( !preg_match( '/^data-(?!ooui|mw|parsoid)[^:]*$/i', $attribute )
+                       if ( !preg_match( '/^data-[^:]*$/i', $attribute )
                                && !isset( $whitelist[$attribute] )
+                               || self::isReservedDataAttribute( $attribute )
                        ) {
                                continue;
                        }
@@ -858,6 +855,24 @@ class Sanitizer {
                return $out;
        }
 
+       /**
+        * Given an attribute name, checks whether it is a reserved data attribute
+        * (such as data-mw-foo) which is unavailable to user-generated HTML so MediaWiki
+        * core and extension code can safely use it to communicate with frontend code.
+        * @param string $attr Attribute name.
+        * @return bool
+        */
+       public static function isReservedDataAttribute( $attr ) {
+               // data-ooui is reserved for ooui.
+               // data-mw and data-parsoid are reserved for parsoid.
+               // data-mw-<name here> is reserved for extensions (or core) if
+               // they need to communicate some data to the client and want to be
+               // sure that it isn't coming from an untrusted user.
+               // We ignore the possibility of namespaces since user-generated HTML
+               // can't use them anymore.
+               return (bool)preg_match( '/^data-(ooui|mw|parsoid)/i', $attr );
+       }
+
        /**
         * Merge two sets of HTML attributes.  Conflicting items in the second set
         * will override those in the first, except for 'class' attributes which