Changeset 42185 for trunk/src/wp-includes/widgets/class-wp-widget-custom-html.php

Timestamp:

11/15/2017 02:26:56 AM (9 years ago)

Author:

westonruter

Message:

Widgets: Set global $post to current queried object instead of nullifying when is_singular() while applying filters (and shortcodes) in Text widget and (via plugin) Custom HTML widget.

Also prevent [gallery] shortcode from dumping out every attachment on the site when a containing Text widget is shown on an archive template.

Props westonruter, bobbingwide, joemcgill for testing.
See #10457.
Fixes #42548, #42547 for trunk.

File:

• trunk/src/wp-includes/widgets/class-wp-widget-custom-html.php (modified) (3 diffs)

trunk/src/wp-includes/widgets/class-wp-widget-custom-html.php

@@ -82 +82 @@
 
         /**
+         * Filter gallery shortcode attributes.
+         *
+         * Prevents all of a site's attachments from being shown in a gallery displayed on a
+         * non-singular template where a $post context is not available.
+         *
+         * @since 4.9.0
+         *
+         * @param array $attrs Attributes.
+         * @return array Attributes.
+         */
+        public function _filter_gallery_shortcode_attrs( $attrs ) {
+                if ( ! is_singular() && empty( $attrs['id'] ) && empty( $attrs['include'] ) ) {
+                        $attrs['id'] = -1;
+                }
+                return $attrs;
+        }
+
+        /**
          * Outputs the content for the current Custom HTML widget instance.
          *
          * @since 4.8.1
          *
+         * @global WP_Post $post
          * @param array $args     Display arguments including 'before_title', 'after_title',
          *                        'before_widget', and 'after_widget'.
@@ -91 +110 @@
          */
         public function widget( $args, $instance ) {
+                global $post;
+
+                // Override global $post so filters (and shortcodes) apply in a consistent context.
+                $original_post = $post;
+                if ( is_singular() ) {
+                        // Make sure post is always the queried object on singular queries (not from another sub-query that failed to clean up the global $post).
+                        $post = get_queried_object();
+                } else {
+                        // Nullify the $post global during widget rendering to prevent shortcodes from running with the unexpected context on archive queries.
+                        $post = null;
+                }
+
+                // Prevent dumping out all attachments from the media library.
+                add_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
 
                 $instance = array_merge( $this->default_instance, $instance );
@@ -118 +151 @@
                  */
                 $content = apply_filters( 'widget_custom_html_content', $content, $instance, $this );
+
+                // Restore post global.
+                $post = $original_post;
+                remove_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
 
                 // Inject the Text widget's container class name alongside this widget's class name for theme styling compatibility.