• File: block-editor.php
  • Full Path: /home/u505525515/domains/medineeestates.com/public_html/wp-includes/block-editor.php
  • Date Modified: 05/25/2026 6:29 AM
  • File size: 28.05 KB
  • MIME-type: text/x-php
  • Charset: utf-8
<?php
/**
 * Block Editor API.
 *
 * @package WordPress
 * @subpackage Editor
 * @since 5.8.0
 */

/**
 * Returns the list of default categories for block types.
 *
 * @since 5.8.0
 * @since 6.3.0 Reusable Blocks renamed to Patterns.
 *
 * @return array[] Array of categories for block types.
 */
function get_default_block_categories() {
    return array(
        array(
            'slug'  => 'text',
            'title' => _x( 'Text', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'media',
            'title' => _x( 'Media', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'design',
            'title' => _x( 'Design', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'widgets',
            'title' => _x( 'Widgets', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'theme',
            'title' => _x( 'Theme', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'embed',
            'title' => _x( 'Embeds', 'block category' ),
            'icon'  => null,
        ),
        array(
            'slug'  => 'reusable',
            'title' => _x( 'Patterns', 'block category' ),
            'icon'  => null,
        ),
    );
}

/**
 * Returns all the categories for block types that will be shown in the block editor.
 *
 * @since 5.0.0
 * @since 5.8.0 It is possible to pass the block editor context as param.
 *
 * @param WP_Post|WP_Block_Editor_Context $post_or_block_editor_context The current post object or
 *                                                                      the block editor context.
 *
 * @return array[] Array of categories for block types.
 */
function get_block_categories( $post_or_block_editor_context ) {
    $block_categories     = get_default_block_categories();
    $block_editor_context = $post_or_block_editor_context instanceof WP_Post ?
        new WP_Block_Editor_Context(
            array(
                'post' => $post_or_block_editor_context,
            )
        ) : $post_or_block_editor_context;

    /**
     * Filters the default array of categories for block types.
     *
     * @since 5.8.0
     *
     * @param array[]                 $block_categories     Array of categories for block types.
     * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
     */
    $block_categories = apply_filters( 'block_categories_all', $block_categories, $block_editor_context );

    if ( ! empty( $block_editor_context->post ) ) {
        $post = $block_editor_context->post;

        /**
         * Filters the default array of categories for block types.
         *
         * @since 5.0.0
         * @deprecated 5.8.0 Use the {@see 'block_categories_all'} filter instead.
         *
         * @param array[] $block_categories Array of categories for block types.
         * @param WP_Post $post             Post being loaded.
         */
        $block_categories = apply_filters_deprecated( 'block_categories', array( $block_categories, $post ), '5.8.0', 'block_categories_all' );
    }

    return $block_categories;
}

/**
 * Gets the list of allowed block types to use in the block editor.
 *
 * @since 5.8.0
 *
 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
 *
 * @return bool|string[] Array of block type slugs, or boolean to enable/disable all.
 */
function get_allowed_block_types( $block_editor_context ) {
    $allowed_block_types = true;

    /**
     * Filters the allowed block types for all editor types.
     *
     * @since 5.8.0
     *
     * @param bool|string[]           $allowed_block_types  Array of block type slugs, or boolean to enable/disable all.
     *                                                      Default true (all registered block types supported).
     * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
     */
    $allowed_block_types = apply_filters( 'allowed_block_types_all', $allowed_block_types, $block_editor_context );

    if ( ! empty( $block_editor_context->post ) ) {
        $post = $block_editor_context->post;

        /**
         * Filters the allowed block types for the editor.
         *
         * @since 5.0.0
         * @deprecated 5.8.0 Use the {@see 'allowed_block_types_all'} filter instead.
         *
         * @param bool|string[] $allowed_block_types Array of block type slugs, or boolean to enable/disable all.
         *                                           Default true (all registered block types supported)
         * @param WP_Post       $post                The post resource data.
         */
        $allowed_block_types = apply_filters_deprecated( 'allowed_block_types', array( $allowed_block_types, $post ), '5.8.0', 'allowed_block_types_all' );
    }

    return $allowed_block_types;
}

/**
 * Returns the default block editor settings.
 *
 * @since 5.8.0
 *
 * @return array The default block editor settings.
 */
function get_default_block_editor_settings() {
    // Media settings.

    // wp_max_upload_size() can be expensive, so only call it when relevant for the current user.
    $max_upload_size = 0;
    if ( current_user_can( 'upload_files' ) ) {
        $max_upload_size = wp_max_upload_size();
        if ( ! $max_upload_size ) {
            $max_upload_size = 0;
        }
    }

    /** This filter is documented in wp-admin/includes/media.php */
    $image_size_names = apply_filters(
        'image_size_names_choose',
        array(
            'thumbnail' => __( 'Thumbnail' ),
            'medium'    => __( 'Medium' ),
            'large'     => __( 'Large' ),
            'full'      => __( 'Full Size' ),
        )
    );

    $available_image_sizes = array();
    foreach ( $image_size_names as $image_size_slug => $image_size_name ) {
        $available_image_sizes[] = array(
            'slug' => $image_size_slug,
            'name' => $image_size_name,
        );
    }

    $default_size       = get_option( 'image_default_size', 'large' );
    $image_default_size = in_array( $default_size, array_keys( $image_size_names ), true ) ? $default_size : 'large';

    $image_dimensions = array();
    $all_sizes        = wp_get_registered_image_subsizes();
    foreach ( $available_image_sizes as $size ) {
        $key = $size['slug'];
        if ( isset( $all_sizes[ $key ] ) ) {
            $image_dimensions[ $key ] = $all_sizes[ $key ];
        }
    }

    // These styles are used if the "no theme styles" options is triggered or on
    // themes without their own editor styles.
    $default_editor_styles_file = ABSPATH . WPINC . '/css/dist/block-editor/default-editor-styles.css';

    static $default_editor_styles_file_contents = false;
    if ( ! $default_editor_styles_file_contents && file_exists( $default_editor_styles_file ) ) {
        $default_editor_styles_file_contents = file_get_contents( $default_editor_styles_file );
    }

    $default_editor_styles = array();
    if ( $default_editor_styles_file_contents ) {
        $default_editor_styles = array(
            array( 'css' => $default_editor_styles_file_contents ),
        );
    }

    $editor_settings = array(
        'alignWide'                        => get_theme_support( 'align-wide' ),
        'allowedBlockTypes'                => true,
        'allowedMimeTypes'                 => get_allowed_mime_types(),
        'defaultEditorStyles'              => $default_editor_styles,
        'blockCategories'                  => get_default_block_categories(),
        'isRTL'                            => is_rtl(),
        'imageDefaultSize'                 => $image_default_size,
        'imageDimensions'                  => $image_dimensions,
        'imageEditing'                     => true,
        'imageSizes'                       => $available_image_sizes,
        'maxUploadFileSize'                => $max_upload_size,
        '__experimentalDashboardLink'      => admin_url( '/' ),
        // The following flag is required to enable the new Gallery block format on the mobile apps in 5.9.
        '__unstableGalleryWithImageBlocks' => true,
    );

    $theme_settings = get_classic_theme_supports_block_editor_settings();
    foreach ( $theme_settings as $key => $value ) {
        $editor_settings[ $key ] = $value;
    }

    return $editor_settings;
}

/**
 * Returns the block editor settings needed to use the Legacy Widget block which
 * is not registered by default.
 *
 * @since 5.8.0
 *
 * @return array Settings to be used with get_block_editor_settings().
 */
function get_legacy_widget_block_editor_settings() {
    $editor_settings = array();

    /**
     * Filters the list of widget-type IDs that should **not** be offered by the
     * Legacy Widget block.
     *
     * Returning an empty array will make all widgets available.
     *
     * @since 5.8.0
     *
     * @param string[] $widgets An array of excluded widget-type IDs.
     */
    $editor_settings['widgetTypesToHideFromLegacyWidgetBlock'] = apply_filters(
        'widget_types_to_hide_from_legacy_widget_block',
        array(
            'pages',
            'calendar',
            'archives',
            'media_audio',
            'media_image',
            'media_gallery',
            'media_video',
            'search',
            'text',
            'categories',
            'recent-posts',
            'recent-comments',
            'rss',
            'tag_cloud',
            'custom_html',
            'block',
        )
    );

    return $editor_settings;
}

/**
 * Collect the block editor assets that need to be loaded into the editor's iframe.
 *
 * @since 6.0.0
 * @access private
 *
 * @global WP_Styles  $wp_styles  The WP_Styles current instance.
 * @global WP_Scripts $wp_scripts The WP_Scripts current instance.
 *
 * @return array {
 *     The block editor assets.
 *
 *     @type string|false $styles  String containing the HTML for styles.
 *     @type string|false $scripts String containing the HTML for scripts.
 * }
 */
function _wp_get_iframed_editor_assets() {
    global $wp_styles, $wp_scripts;

    // Keep track of the styles and scripts instance to restore later.
    $current_wp_styles  = $wp_styles;
    $current_wp_scripts = $wp_scripts;

    // Create new instances to collect the assets.
    $wp_styles  = new WP_Styles();
    $wp_scripts = new WP_Scripts();

    /*
     * Register all currently registered styles and scripts. The actions that
     * follow enqueue assets, but don't necessarily register them.
     */
    $wp_styles->registered  = $current_wp_styles->registered;
    $wp_scripts->registered = $current_wp_scripts->registered;

    /*
     * We generally do not need reset styles for the iframed editor.
     * However, if it's a classic theme, margins will be added to every block,
     * which is reset specifically for list items, so classic themes rely on
     * these reset styles.
     */
    $wp_styles->done =
        wp_theme_has_theme_json() ? array( 'wp-reset-editor-styles' ) : array();

    wp_enqueue_script( 'wp-polyfill' );
    // Enqueue the `editorStyle` handles for all core block, and dependencies.
    wp_enqueue_style( 'wp-edit-blocks' );

    if ( current_theme_supports( 'wp-block-styles' ) ) {
        wp_enqueue_style( 'wp-block-library-theme' );
    }

    /*
     * We don't want to load EDITOR scripts in the iframe, only enqueue
     * front-end assets for the content.
     */
    add_filter( 'should_load_block_editor_scripts_and_styles', '__return_false' );
    /** This action is documented in wp-includes/script-loader.php */
    do_action( 'enqueue_block_assets' );
    remove_filter( 'should_load_block_editor_scripts_and_styles', '__return_false' );

    $block_registry = WP_Block_Type_Registry::get_instance();

    /*
     * Additionally, do enqueue `editorStyle` assets for all blocks, which
     * contains editor-only styling for blocks (editor content).
     */
    foreach ( $block_registry->get_all_registered() as $block_type ) {
        if ( isset( $block_type->editor_style_handles ) && is_array( $block_type->editor_style_handles ) ) {
            foreach ( $block_type->editor_style_handles as $style_handle ) {
                wp_enqueue_style( $style_handle );
            }
        }
    }

    /**
     * Remove the deprecated `print_emoji_styles` handler.
     * It avoids breaking style generation with a deprecation message.
     */
    $has_emoji_styles = has_action( 'wp_print_styles', 'print_emoji_styles' );
    if ( $has_emoji_styles ) {
        remove_action( 'wp_print_styles', 'print_emoji_styles' );
    }

    ob_start();
    wp_print_styles();
    wp_print_font_faces();
    wp_print_font_faces_from_style_variations();
    $styles = ob_get_clean();

    if ( $has_emoji_styles ) {
        add_action( 'wp_print_styles', 'print_emoji_styles' );
    }

    ob_start();
    wp_print_head_scripts();
    wp_print_footer_scripts();
    $scripts = ob_get_clean();

    // Restore the original instances.
    $wp_styles  = $current_wp_styles;
    $wp_scripts = $current_wp_scripts;

    return array(
        'styles'  => $styles,
        'scripts' => $scripts,
    );
}

/**
 * Finds the first occurrence of a specific block in an array of blocks.
 *
 * @since 6.3.0
 *
 * @param array  $blocks     Array of blocks.
 * @param string $block_name Name of the block to find.
 * @return array Found block, or empty array if none found.
 */
function wp_get_first_block( $blocks, $block_name ) {
    foreach ( $blocks as $block ) {
        if ( $block_name === $block['blockName'] ) {
            return $block;
        }
        if ( ! empty( $block['innerBlocks'] ) ) {
            $found_block = wp_get_first_block( $block['innerBlocks'], $block_name );

            if ( ! empty( $found_block ) ) {
                return $found_block;
            }
        }
    }

    return array();
}

/**
 * Retrieves Post Content block attributes from the current post template.
 *
 * @since 6.3.0
 * @since 6.4.0 Return null if there is no post content block.
 * @access private
 *
 * @global int $post_ID
 *
 * @return array|null Post Content block attributes array or null if Post Content block doesn't exist.
 */
function wp_get_post_content_block_attributes() {
    global $post_ID;

    $is_block_theme = wp_is_block_theme();

    if ( ! $is_block_theme || ! $post_ID ) {
        return null;
    }

    $template_slug = get_page_template_slug( $post_ID );

    if ( ! $template_slug ) {
        $post_slug      = 'singular';
        $page_slug      = 'singular';
        $template_types = get_block_templates();

        foreach ( $template_types as $template_type ) {
            if ( 'page' === $template_type->slug ) {
                $page_slug = 'page';
            }
            if ( 'single' === $template_type->slug ) {
                $post_slug = 'single';
            }
        }

        $what_post_type = get_post_type( $post_ID );
        switch ( $what_post_type ) {
            case 'page':
                $template_slug = $page_slug;
                break;
            default:
                $template_slug = $post_slug;
                break;
        }
    }

    $current_template = get_block_templates( array( 'slug__in' => array( $template_slug ) ) );

    if ( ! empty( $current_template ) ) {
        $template_blocks    = parse_blocks( $current_template[0]->content );
        $post_content_block = wp_get_first_block( $template_blocks, 'core/post-content' );

        if ( isset( $post_content_block['attrs'] ) ) {
            return $post_content_block['attrs'];
        }
    }

    return null;
}

/**
 * Returns the contextualized block editor settings for a selected editor context.
 *
 * @since 5.8.0
 *
 * @param array                   $custom_settings      Custom settings to use with the given editor type.
 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
 *
 * @return array The contextualized block editor settings.
 */
function get_block_editor_settings( array $custom_settings, $block_editor_context ) {
    $editor_settings = array_merge(
        get_default_block_editor_settings(),
        array(
            'allowedBlockTypes' => get_allowed_block_types( $block_editor_context ),
            'blockCategories'   => get_block_categories( $block_editor_context ),
        ),
        $custom_settings
    );

    $editor_settings['__experimentalBlockBindingsSupportedAttributes'] = array();
    foreach ( array_keys( WP_Block_Type_Registry::get_instance()->get_all_registered() ) as $block_type ) {
        $supported_block_attributes = get_block_bindings_supported_attributes( $block_type );
        if ( ! empty( $supported_block_attributes ) ) {
            $editor_settings['__experimentalBlockBindingsSupportedAttributes'][ $block_type ] = $supported_block_attributes;
        }
    }

    $global_styles = array();
    $presets       = array(
        array(
            'css'            => 'variables',
            '__unstableType' => 'presets',
            'isGlobalStyles' => true,
        ),
        array(
            'css'            => 'presets',
            '__unstableType' => 'presets',
            'isGlobalStyles' => true,
        ),
    );
    foreach ( $presets as $preset_style ) {
        $actual_css = wp_get_global_stylesheet( array( $preset_style['css'] ) );
        if ( '' !== $actual_css ) {
            $preset_style['css'] = $actual_css;
            $global_styles[]     = $preset_style;
        }
    }

    $block_classes = array(
        'css'            => 'styles',
        '__unstableType' => 'theme',
        'isGlobalStyles' => true,
    );
    $actual_css    = wp_get_global_stylesheet( array( $block_classes['css'] ) );
    if ( '' !== $actual_css ) {
        $block_classes['css'] = $actual_css;
        $global_styles[]      = $block_classes;
    }

    // Get any additional css from the customizer and add it before global styles custom CSS.
    $global_styles[] = array(
        'css'            => wp_get_custom_css(),
        '__unstableType' => 'user',
        'isGlobalStyles' => false,
    );

    /*
     * Add the custom CSS as a separate stylesheet so any invalid CSS
     * entered by users does not break other global styles.
     */
    $global_styles[] = array(
        'css'            => wp_get_global_stylesheet( array( 'custom-css' ) ),
        '__unstableType' => 'user',
        'isGlobalStyles' => true,
    );

    $editor_settings['styles'] = array_merge( $global_styles, get_block_editor_theme_styles() );

    $editor_settings['__experimentalFeatures'] = wp_get_global_settings();
    // These settings may need to be updated based on data coming from theme.json sources.
    if ( isset( $editor_settings['__experimentalFeatures']['color']['palette'] ) ) {
        $colors_by_origin          = $editor_settings['__experimentalFeatures']['color']['palette'];
        $editor_settings['colors'] = $colors_by_origin['custom'] ?? $colors_by_origin['theme'] ?? $colors_by_origin['default'];
    }
    if ( isset( $editor_settings['__experimentalFeatures']['color']['gradients'] ) ) {
        $gradients_by_origin          = $editor_settings['__experimentalFeatures']['color']['gradients'];
        $editor_settings['gradients'] = $gradients_by_origin['custom'] ?? $gradients_by_origin['theme'] ?? $gradients_by_origin['default'];
    }
    if ( isset( $editor_settings['__experimentalFeatures']['typography']['fontSizes'] ) ) {
        $font_sizes_by_origin         = $editor_settings['__experimentalFeatures']['typography']['fontSizes'];
        $editor_settings['fontSizes'] = $font_sizes_by_origin['custom'] ?? $font_sizes_by_origin['theme'] ?? $font_sizes_by_origin['default'];
    }
    if ( isset( $editor_settings['__experimentalFeatures']['color']['custom'] ) ) {
        $editor_settings['disableCustomColors'] = ! $editor_settings['__experimentalFeatures']['color']['custom'];
        unset( $editor_settings['__experimentalFeatures']['color']['custom'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['color']['customGradient'] ) ) {
        $editor_settings['disableCustomGradients'] = ! $editor_settings['__experimentalFeatures']['color']['customGradient'];
        unset( $editor_settings['__experimentalFeatures']['color']['customGradient'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['typography']['customFontSize'] ) ) {
        $editor_settings['disableCustomFontSizes'] = ! $editor_settings['__experimentalFeatures']['typography']['customFontSize'];
        unset( $editor_settings['__experimentalFeatures']['typography']['customFontSize'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['typography']['lineHeight'] ) ) {
        $editor_settings['enableCustomLineHeight'] = $editor_settings['__experimentalFeatures']['typography']['lineHeight'];
        unset( $editor_settings['__experimentalFeatures']['typography']['lineHeight'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['spacing']['units'] ) ) {
        $editor_settings['enableCustomUnits'] = $editor_settings['__experimentalFeatures']['spacing']['units'];
        unset( $editor_settings['__experimentalFeatures']['spacing']['units'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['spacing']['padding'] ) ) {
        $editor_settings['enableCustomSpacing'] = $editor_settings['__experimentalFeatures']['spacing']['padding'];
        unset( $editor_settings['__experimentalFeatures']['spacing']['padding'] );
    }
    if ( isset( $editor_settings['__experimentalFeatures']['spacing']['customSpacingSize'] ) ) {
        $editor_settings['disableCustomSpacingSizes'] = ! $editor_settings['__experimentalFeatures']['spacing']['customSpacingSize'];
        unset( $editor_settings['__experimentalFeatures']['spacing']['customSpacingSize'] );
    }

    if ( isset( $editor_settings['__experimentalFeatures']['spacing']['spacingSizes'] ) ) {
        $spacing_sizes_by_origin         = $editor_settings['__experimentalFeatures']['spacing']['spacingSizes'];
        $editor_settings['spacingSizes'] = $spacing_sizes_by_origin['custom'] ?? $spacing_sizes_by_origin['theme'] ?? $spacing_sizes_by_origin['default'];
    }

    $editor_settings['__unstableResolvedAssets']         = _wp_get_iframed_editor_assets();
    $editor_settings['__unstableIsBlockBasedTheme']      = wp_is_block_theme();
    $editor_settings['localAutosaveInterval']            = 15;
    $editor_settings['disableLayoutStyles']              = current_theme_supports( 'disable-layout-styles' );
    $editor_settings['__experimentalDiscussionSettings'] = array(
        'commentOrder'         => get_option( 'comment_order' ),
        'commentsPerPage'      => get_option( 'comments_per_page' ),
        'defaultCommentsPage'  => get_option( 'default_comments_page' ),
        'pageComments'         => get_option( 'page_comments' ),
        'threadComments'       => get_option( 'thread_comments' ),
        'threadCommentsDepth'  => get_option( 'thread_comments_depth' ),
        'defaultCommentStatus' => get_option( 'default_comment_status' ),
        'avatarURL'            => get_avatar_url(
            '',
            array(
                'size'          => 96,
                'force_default' => true,
                'default'       => get_option( 'avatar_default' ),
            )
        ),
    );

    $post_content_block_attributes = wp_get_post_content_block_attributes();

    if ( isset( $post_content_block_attributes ) ) {
        $editor_settings['postContentAttributes'] = $post_content_block_attributes;
    }

    $editor_settings['canUpdateBlockBindings'] = current_user_can( 'edit_block_binding', $block_editor_context );

    /**
     * Filters the settings to pass to the block editor for all editor type.
     *
     * @since 5.8.0
     *
     * @param array                   $editor_settings      Default editor settings.
     * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
     */
    $editor_settings = apply_filters( 'block_editor_settings_all', $editor_settings, $block_editor_context );

    if ( ! empty( $block_editor_context->post ) ) {
        $post = $block_editor_context->post;

        /**
         * Filters the settings to pass to the block editor.
         *
         * @since 5.0.0
         * @deprecated 5.8.0 Use the {@see 'block_editor_settings_all'} filter instead.
         *
         * @param array   $editor_settings Default editor settings.
         * @param WP_Post $post            Post being edited.
         */
        $editor_settings = apply_filters_deprecated( 'block_editor_settings', array( $editor_settings, $post ), '5.8.0', 'block_editor_settings_all' );
    }

    $editor_settings['canEditCSS'] = current_user_can( 'edit_css' );

    return $editor_settings;
}

/**
 * Preloads common data used with the block editor by specifying an array of
 * REST API paths that will be preloaded for a given block editor context.
 *
 * @since 5.8.0
 *
 * @global WP_Post    $post       Global post object.
 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
 * @global WP_Styles  $wp_styles  The WP_Styles object for printing styles.
 *
 * @param (string|string[])[]     $preload_paths        List of paths to preload.
 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
 */
function block_editor_rest_api_preload( array $preload_paths, $block_editor_context ) {
    global $post, $wp_scripts, $wp_styles;

    /**
     * Filters the array of REST API paths that will be used to preloaded common data for the block editor.
     *
     * @since 5.8.0
     *
     * @param (string|string[])[]     $preload_paths        Array of paths to preload.
     * @param WP_Block_Editor_Context $block_editor_context The current block editor context.
     */
    $preload_paths = apply_filters( 'block_editor_rest_api_preload_paths', $preload_paths, $block_editor_context );

    if ( ! empty( $block_editor_context->post ) ) {
        $selected_post = $block_editor_context->post;

        /**
         * Filters the array of paths that will be preloaded.
         *
         * Preload common data by specifying an array of REST API paths that will be preloaded.
         *
         * @since 5.0.0
         * @deprecated 5.8.0 Use the {@see 'block_editor_rest_api_preload_paths'} filter instead.
         *
         * @param (string|string[])[] $preload_paths Array of paths to preload.
         * @param WP_Post             $selected_post Post being edited.
         */
        $preload_paths = apply_filters_deprecated( 'block_editor_preload_paths', array( $preload_paths, $selected_post ), '5.8.0', 'block_editor_rest_api_preload_paths' );
    }

    if ( empty( $preload_paths ) ) {
        return;
    }

    /*
     * Ensure the global $post, $wp_scripts, and $wp_styles remain the same after
     * API data is preloaded.
     * Because API preloading can call the_content and other filters, plugins
     * can unexpectedly modify the global $post or enqueue assets which are not
     * intended for the block editor.
     */
    $backup_global_post = ! empty( $post ) ? clone $post : $post;
    $backup_wp_scripts  = ! empty( $wp_scripts ) ? clone $wp_scripts : $wp_scripts;
    $backup_wp_styles   = ! empty( $wp_styles ) ? clone $wp_styles : $wp_styles;

    foreach ( $preload_paths as &$path ) {
        if ( is_string( $path ) && ! str_starts_with( $path, '/' ) ) {
            $path = '/' . $path;
            continue;
        }

        if ( is_array( $path ) && is_string( $path[0] ) && ! str_starts_with( $path[0], '/' ) ) {
            $path[0] = '/' . $path[0];
        }
    }

    unset( $path );

    $preload_data = array_reduce(
        $preload_paths,
        'rest_preload_api_request',
        array()
    );

    // Restore the global $post, $wp_scripts, and $wp_styles as they were before API preloading.
    $post       = $backup_global_post;
    $wp_scripts = $backup_wp_scripts;
    $wp_styles  = $backup_wp_styles;

    wp_add_inline_script(
        'wp-api-fetch',
        sprintf(
            'wp.apiFetch.use( wp.apiFetch.createPreloadingMiddleware( %s ) );',
            wp_json_encode( $preload_data, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES )
        ),
        'after'
    );
}

/**
 * Creates an array of theme styles to load into the block editor.
 *
 * @since 5.8.0
 *
 * @global array $editor_styles
 *
 * @return array An array of theme styles for the block editor.
 */
function get_block_editor_theme_styles() {
    global $editor_styles;

    $styles = array();

    if ( $editor_styles && current_theme_supports( 'editor-styles' ) ) {
        foreach ( $editor_styles as $style ) {
            if ( preg_match( '~^(https?:)?//~', $style ) ) {
                $response = wp_remote_get( $style );
                if ( ! is_wp_error( $response ) ) {
                    $styles[] = array(
                        'css'            => wp_remote_retrieve_body( $response ),
                        '__unstableType' => 'theme',
                        'isGlobalStyles' => false,
                    );
                }
            } else {
                $file = get_theme_file_path( $style );
                if ( is_file( $file ) ) {
                    $styles[] = array(
                        'css'            => file_get_contents( $file ),
                        'baseURL'        => get_theme_file_uri( $style ),
                        '__unstableType' => 'theme',
                        'isGlobalStyles' => false,
                    );
                }
            }
        }
    }

    return $styles;
}

/**
 * Returns the classic theme supports settings for block editor.
 *
 * @since 6.2.0
 * @since 6.6.0 Add support for 'editor-spacing-sizes' theme support.
 *
 * @return array The classic theme supports settings.
 */
function get_classic_theme_supports_block_editor_settings() {
    $theme_settings = array(
        'disableCustomColors'    => get_theme_support( 'disable-custom-colors' ),
        'disableCustomFontSizes' => get_theme_support( 'disable-custom-font-sizes' ),
        'disableCustomGradients' => get_theme_support( 'disable-custom-gradients' ),
        'disableLayoutStyles'    => get_theme_support( 'disable-layout-styles' ),
        'enableCustomLineHeight' => get_theme_support( 'custom-line-height' ),
        'enableCustomSpacing'    => get_theme_support( 'custom-spacing' ),
        'enableCustomUnits'      => get_theme_support( 'custom-units' ),
    );

    // Theme settings.
    $color_palette = current( (array) get_theme_support( 'editor-color-palette' ) );
    if ( false !== $color_palette ) {
        $theme_settings['colors'] = $color_palette;
    }

    $font_sizes = current( (array) get_theme_support( 'editor-font-sizes' ) );
    if ( false !== $font_sizes ) {
        $theme_settings['fontSizes'] = $font_sizes;
    }

    $gradient_presets = current( (array) get_theme_support( 'editor-gradient-presets' ) );
    if ( false !== $gradient_presets ) {
        $theme_settings['gradients'] = $gradient_presets;
    }

    $spacing_sizes = current( (array) get_theme_support( 'editor-spacing-sizes' ) );
    if ( false !== $spacing_sizes ) {
        $theme_settings['spacingSizes'] = $spacing_sizes;
    }

    return $theme_settings;
}

/**
 * Initialize site preview.
 *
 * This function sets IFRAME_REQUEST to true if the site preview parameter is set.
 *
 * @since 6.8.0
 */
function wp_initialize_site_preview_hooks() {
    if (
        ! defined( 'IFRAME_REQUEST' ) &&
        isset( $_GET['wp_site_preview'] ) &&
        1 === (int) $_GET['wp_site_preview'] &&
        current_user_can( 'edit_theme_options' )
    ) {
        define( 'IFRAME_REQUEST', true );
    }
}