wp-includes/customize/class-wp-customize-selective-refresh.php:300Handles the Ajax request to return the rendered partials for the requested placements.
3 hooks fire while WP_Customize_Selective_Refresh::handle_render_partials_request() runs, in this order:
Fires immediately before partials are rendered.
Fires immediately after partials are rendered.
Filters the response from rendering the partials.
public function handle_render_partials_request() { if ( ! $this->is_render_partials_request() ) { return; } /* * Note that is_customize_preview() returning true will entail that the * user passed the 'customize' capability check and the nonce check, since * WP_Customize_Manager::setup_theme() is where the previewing flag is set. */ if ( ! is_customize_preview() ) { wp_send_json_error( 'expected_customize_preview', 403 ); } elseif ( ! isset( $_POST['partials'] ) ) { wp_send_json_error( 'missing_partials', 400 ); } // Ensure that doing selective refresh on 404 template doesn't result in fallback rendering behavior (full refreshes). status_header( 200 ); $partials = json_decode( wp_unslash( $_POST['partials'] ), true ); if ( ! is_array( $partials ) ) { wp_send_json_error( 'malformed_partials' ); } $this->add_dynamic_partials( array_keys( $partials ) ); /** * Fires immediately before partials are rendered. * * Plugins may do things like call wp_enqueue_scripts() and gather a list of the scripts * and styles which may get enqueued in the response. * * @since 4.5.0 * * @param WP_Customize_Selective_Refresh $refresh Selective refresh component. * @param array $partials Placements' context data for the partials rendered in the request. * The array is keyed by partial ID, with each item being an array of * the placements' context data. */ do_action( 'customize_render_partials_before', $this, $partials ); set_error_handler( array( $this, 'handle_error' ), error_reporting() ); $contents = array(); foreach ( $partials as $partial_id => $container_contexts ) { $this->current_partial_id = $partial_id; if ( ! is_array( $container_contexts ) ) { wp_send_json_error( 'malformed_container_contexts' ); } $partial = $this->get_partial( $partial_id ); if ( ! $partial || ! $partial->check_capabilities() ) { $contents[ $partial_id ] = null; continue; } $contents[ $partial_id ] = array(); // @todo The array should include not only the contents, but also whether the container is included? if ( empty( $container_contexts ) ) { // Since there are no container contexts, render just once. $contents[ $partial_id ][] = $partial->render( null ); } else { foreach ( $container_contexts as $container_context ) { $contents[ $partial_id ][] = $partial->render( $container_context ); } } } $this->current_partial_id = null; restore_error_handler(); /** * Fires immediately after partials are rendered. * * Plugins may do things like call wp_footer() to scrape scripts output and return themIntroduced in 4.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/customize/class-wp-customize-selective-refresh.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.