Ticket #5018: 5018.diff

wordpress.org/public_html/wp-content/themes/pub/wporg-developer/inc/explanations.php

@@ -60 +60 @@
                 // Output checkmark in explanations column if post has an explanation.
                 add_action( 'manage_posts_custom_column', array( $this, 'handle_column_data'  ), 10, 2 );
 
+                add_filter( 'preview_post_link',           array ( $this, 'preview_post_link'     ), 10, 2 );
+
                 // Permissions.
                 add_action( 'after_switch_theme',      array( $this, 'add_roles'              )        );
                 add_filter( 'user_has_cap',            array( $this, 'grant_caps'             )        );
@@ -92 +94 @@
                                 'not_found_in_trash'  => __( 'No Explanations found in trash', 'wporg' ),
                         ),
                         'public'            => false,
+                        'publicly_queryable'=> true,
                         'hierarchical'      => false,
                         'show_ui'           => true,
                         'show_in_menu'      => true,
@@ -117 +120 @@
                 }
         }
 
+        /**
+         * Catch and complement preview post links from 'explanation' post types,
+         * divert them to their parent Function/Hook/etc. post preview with extra
+         * query parameters to override the respective section with the user's edits.
+         *
+         * @param string $preview_link The preview URL as generated by a previous internal call to get_preview_post_link
+         * @param WP_Post $post Current post object.
+         *
+         * @see 'preview_post_link' filter
+         * @access public
+         * @return string
+         **/
+        public function preview_post_link( $preview_link, $post ) {
+                if ( $this->exp_post_type != $post->post_type ) {
+                        return $preview_link;
+                }
+
+                if ( false !== strpos( $preview_link, 'preview_nonce=' ) ) {
+                        $url = parse_url( $preview_link );
+                        $url_query = array();
+                        parse_str ( $url['query'], $url_query );
+
+                        return get_preview_post_link(
+                                $post->post_parent,
+                                array(
+                                        'wporg_explanations_preview_id' => $url_query['preview_id'],
+                                        'wporg_explanations_preview_nonce' => $url_query['preview_nonce'],
+                                )
+                        );
+                }
+
+                return $preview_link;
+        }
+
         /**
          * Customizes admin menu.
          *

wordpress.org/public_html/wp-content/themes/pub/wporg-developer/inc/template-tags.php

@@ -1681 +1681 @@
                 $post = get_explanation( $_post );
 
                 // Get explanation's raw post content.
-                $content = get_explanation_field( 'post_content', $_post );
+                if ( !empty( $_GET['wporg_explanations_preview_nonce'] )
+                        && false !== wp_verify_nonce( $_GET['wporg_explanations_preview_nonce'], 'post_preview_' . $post->ID )
+                ) {
+                        $preview = wp_get_post_autosave( $post->ID );
+
+                        if ( is_object( $preview ) ) {
+                                $post = $preview;
+                                $content = get_post_field( 'post_content', $preview, 'display' );
+                        }
+                } else {
+                        $content = get_explanation_field( 'post_content', $_post );
+                }
 
                 // Pass the content through expected content filters.
                 $content = apply_filters( 'the_content', apply_filters( 'get_the_content', $content ) );