post_parent !== $post->ID && $compare_from->ID !== $post->ID ) return false; if ( $compare_to->post_parent !== $post->ID && $compare_to->ID !== $post->ID ) return false; if ( $compare_from && strtotime( $compare_from->post_date_gmt ) > strtotime( $compare_to->post_date_gmt ) ) { $temp = $compare_from; $compare_from = $compare_to; $compare_to = $temp; } // Add default title if title field is empty if ( $compare_from && empty( $compare_from->post_title ) ) $compare_from->post_title = __( '(no title)' ); if ( empty( $compare_to->post_title ) ) $compare_to->post_title = __( '(no title)' ); $return = array(); foreach ( _wp_post_revision_fields() as $field => $name ) { $content_from = $compare_from ? apply_filters( "_wp_post_revision_field_$field", $compare_from->$field, $field, $compare_from, 'from' ) : ''; $content_to = apply_filters( "_wp_post_revision_field_$field", $compare_to->$field, $field, $compare_to, 'to' ); $diff = wp_text_diff( $content_from, $content_to, array( 'show_split_view' => true ) ); if ( ! $diff && 'post_title' === $field ) { // It's a better user experience to still show the Title, even if it didn't change. // No, you didn't see this. $diff = ''; $diff .= ''; $diff .= ''; $diff .= '

' . esc_html( $compare_from->post_title ) . '

' . esc_html( $compare_to->post_title ) . '

'; } if ( $diff ) { $return[] = array( 'id' => $field, 'name' => $name, 'diff' => $diff, ); } } return $return; } /** * Prepare revisions for JavaScript. * * @since 3.6.0 * * @param object $post The post object. * @param int $selected_revision_id The selected revision id. * @param int $from (optional) The revision id to compare from. * * @return array An associative array of revision data and related settings. */ function wp_prepare_revisions_for_js( $post, $selected_revision_id, $from = null ) { $post = get_post( $post ); $revisions = $authors = array(); $now_gmt = time(); $revisions = wp_get_post_revisions( $post->ID, array( 'order' => 'ASC', 'check_enabled' => false ) ); // If revisions are disabled, we only want autosaves and the current post. if ( ! wp_revisions_enabled( $post ) ) { foreach ( $revisions as $revision_id => $revision ) { if ( ! wp_is_post_autosave( $revision ) ) unset( $revisions[ $revision_id ] ); } $revisions = array( $post->ID => $post ) + $revisions; } $show_avatars = get_option( 'show_avatars' ); cache_users( wp_list_pluck( $revisions, 'post_author' ) ); $can_restore = current_user_can( 'edit_post', $post->ID ); foreach ( $revisions as $revision ) { $modified = strtotime( $revision->post_modified ); $modified_gmt = strtotime( $revision->post_modified_gmt ); if ( $can_restore ) { $restore_link = str_replace( '&', '&', wp_nonce_url( add_query_arg( array( 'revision' => $revision->ID, 'action' => 'restore' ), admin_url( 'revision.php' ) ), "restore-post_{$revision->ID}" ) ); } if ( ! isset( $authors[ $revision->post_author ] ) ) { $authors[ $revision->post_author ] = array( 'id' => (int) $revision->post_author, 'avatar' => $show_avatars ? get_avatar( $revision->post_author, 32 ) : '', 'name' => get_the_author_meta( 'display_name', $revision->post_author ), ); } $autosave = (bool) wp_is_post_autosave( $revision ); $current = ! $autosave && $revision->post_modified_gmt === $post->post_modified_gmt; if ( $current && ! empty( $current_id ) ) { // If multiple revisions have the same post_modified_gmt, highest ID is current. if ( $current_id < $revision->ID ) { $revisions[ $current_id ]['current'] = false; $current_id = $revision->ID; } else { $current = false; } } elseif ( $current ) { $current_id = $revision->ID; } $revisions[ $revision->ID ] = array( 'id' => $revision->ID, 'title' => get_the_title( $post->ID ), 'author' => $authors[ $revision->post_author ], 'date' => date_i18n( __( 'M j, Y @ G:i' ), $modified ), 'dateShort' => date_i18n( _x( 'j M @ G:i', 'revision date short format' ), $modified ), 'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( $modified_gmt, $now_gmt ) ), 'autosave' => $autosave, 'current' => $current, 'restoreUrl' => $can_restore ? $restore_link : false, ); } // If a post has been saved since the last revision (no revisioned fields were changed) // we may not have a "current" revision. Mark the latest revision as "current". if ( empty( $current_id ) ) { if ( $revisions[ $revision->ID ]['autosave'] ) { $revision = end( $revisions ); while ( $revision['autosave'] ) { $revision = prev( $revisions ); } $current_id = $revision['id']; } else { $current_id = $revision->ID; } $revisions[ $current_id ]['current'] = true; } // Now, grab the initial diff $compare_two_mode = is_numeric( $from ); if ( ! $compare_two_mode ) { $found = array_search( $selected_revision_id, array_keys( $revisions ) ); if ( $found ) { $from = array_keys( array_slice( $revisions, $found - 1, 1, true ) ); $from = reset( $from ); } else { $from = 0; } } $from = absint( $from ); $diffs = array( array( 'id' => $from . ':' . $selected_revision_id, 'fields' => wp_get_revision_ui_diff( $post->ID, $from, $selected_revision_id ), )); return array( 'postId' => $post->ID, 'nonce' => wp_create_nonce( 'revisions-ajax-nonce' ), 'revisionData' => array_values( $revisions ), 'to' => $selected_revision_id, 'from' => $from, 'diffData' => $diffs, 'baseUrl' => parse_url( admin_url( 'revision.php' ), PHP_URL_PATH ), 'compareTwoMode' => absint( $compare_two_mode ), // Apparently booleans are not allowed 'revisionIds' => array_keys( $revisions ), ); }