<?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'
);
}
/**
* Set a JavaScript constant for theme activation.
*
* Sets the JavaScript global WP_BLOCK_THEME_ACTIVATE_NONCE containing the nonce
* required to activate a theme. For use within the site editor.
*
* @see https://github.com/WordPress/gutenberg/pull/41836
*
* @since 6.3.0
* @access private
*/
function wp_block_theme_activate_nonce() {
$nonce_handle = 'switch-theme_' . wp_get_theme_preview_path();
?>
<script type="text/javascript">
window.WP_BLOCK_THEME_ACTIVATE_NONCE = <?php echo wp_json_encode( wp_create_nonce( $nonce_handle ) ); ?>;
</script>
<?php
}
/**
* Add filters and actions to enable Block Theme Previews in the Site Editor.
*
* The filters and actions should be added after `pluggable.php` is included as they may
* trigger code that uses `current_user_can()` which requires functionality from `pluggable.php`.
*
* @since 6.3.2
*/
function wp_initialize_theme_preview_hooks() {
if ( ! empty( $_GET['wp_theme_preview'] ) ) {
add_filter( 'stylesheet', 'wp_get_theme_preview_path' );
add_filter( 'template', 'wp_get_theme_preview_path' );
add_action( 'init', 'wp_attach_theme_preview_middleware' );
add_action( 'admin_head', 'wp_block_theme_activate_nonce' );
}
}
في جولة حصرية داخل “الغرفة الزرقاء” بقناة BBC العربية، نكشف كواليس واحدة من أكثر غرف الأخبار تطورًا في العالم.
كيف الذكاء اصطناعي يتحكم بالبث دون تدخل بشري، لتقدم تجربة بصرية مذهلة.
الفيديو يستعرض كيف تمزج BBC بين التقنية والاحتراف لتصنع نشرات إخبارية من قلب المستقبل.