WordPress/wp-admin/includes/theme-previews.php

57 lines
1.6 KiB
PHP

<?php
/**
* Theme previews using the Site Editor for block themes.
*
* @package WordPress
*/
/**
* Filters the blog option to return the path for the previewed theme.
*
* @since 6.3.0
*
* @param string $current_stylesheet The current theme's stylesheet or template path.
* @return string The previewed theme's stylesheet or template path.
*/
function wp_get_theme_preview_path( $current_stylesheet = null ) {
if ( ! current_user_can( 'switch_themes' ) ) {
return $current_stylesheet;
}
$preview_stylesheet = ! empty( $_GET['wp_theme_preview'] ) ? sanitize_text_field( wp_unslash( $_GET['wp_theme_preview'] ) ) : null;
$wp_theme = wp_get_theme( $preview_stylesheet );
if ( ! is_wp_error( $wp_theme->errors() ) ) {
if ( current_filter() === 'template' ) {
$theme_path = $wp_theme->get_template();
} else {
$theme_path = $wp_theme->get_stylesheet();
}
return sanitize_text_field( $theme_path );
}
return $current_stylesheet;
}
/**
* Adds a middleware to `apiFetch` to set the theme for the preview.
* This adds a `wp_theme_preview` URL parameter to API requests from the Site Editor, so they also respond as if the theme is set to the value of the parameter.
*
* @since 6.3.0
*/
function wp_attach_theme_preview_middleware() {
// Don't allow non-admins to preview themes.
if ( ! current_user_can( 'switch_themes' ) ) {
return;
}
wp_add_inline_script(
'wp-api-fetch',
sprintf(
'wp.apiFetch.use( wp.apiFetch.createThemePreviewMiddleware( %s ) );',
wp_json_encode( sanitize_text_field( wp_unslash( $_GET['wp_theme_preview'] ) ) )
),
'after'
);
}