<?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

 *

 * @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( 'Reusable Blocks', '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.

	$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';

	if ( file_exists( $default_editor_styles_file ) ) {

		$default_editor_styles = array(

			array( 'css' => file_get_contents( $default_editor_styles_file ) ),

		);

	} else {

		$default_editor_styles = array();

	}

	$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(),

		'disableCustomColors'              => get_theme_support( 'disable-custom-colors' ),

		'disableCustomFontSizes'           => get_theme_support( 'disable-custom-font-sizes' ),

		'disableCustomGradients'           => get_theme_support( 'disable-custom-gradients' ),

		'enableCustomLineHeight'           => get_theme_support( 'custom-line-height' ),

		'enableCustomSpacing'              => get_theme_support( 'custom-spacing' ),

		'enableCustomUnits'                => get_theme_support( 'custom-units' ),

		'isRTL'                            => is_rtl(),

		'imageDefaultSize'                 => $image_default_size,

		'imageDimensions'                  => $image_dimensions,

		'imageEditing'                     => true,

		'imageSizes'                       => $available_image_sizes,

		'maxUploadFileSize'                => $max_upload_size,

		// The following flag is required to enable the new Gallery block format on the mobile apps in 5.9.

		'__unstableGalleryWithImageBlocks' => true,

	);

	// Theme settings.

	$color_palette = current( (array) get_theme_support( 'editor-color-palette' ) );

	if ( false !== $color_palette ) {

		$editor_settings['colors'] = $color_palette;

	}

	$font_sizes = current( (array) get_theme_support( 'editor-font-sizes' ) );

	if ( false !== $font_sizes ) {

		$editor_settings['fontSizes'] = $font_sizes;

	}

	$gradient_presets = current( (array) get_theme_support( 'editor-gradient-presets' ) );

	if ( false !== $gradient_presets ) {

		$editor_settings['gradients'] = $gradient_presets;

	}

	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 string $pagenow The filename of the current screen.

 *

 * @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 $pagenow;

	$script_handles = array();

	$style_handles  = array(

		'wp-block-editor',

		'wp-block-library',

		'wp-edit-blocks',

	);

	if ( current_theme_supports( 'wp-block-styles' ) ) {

		$style_handles[] = 'wp-block-library-theme';

	}

	if ( 'widgets.php' === $pagenow || 'customize.php' === $pagenow ) {

		$style_handles[] = 'wp-widgets';

		$style_handles[] = 'wp-edit-widgets';

	}

	$block_registry = WP_Block_Type_Registry::get_instance();

	foreach ( $block_registry->get_all_registered() as $block_type ) {

		if ( ! empty( $block_type->style ) ) {

			$style_handles[] = $block_type->style;

		}

		if ( ! empty( $block_type->editor_style ) ) {

			$style_handles[] = $block_type->editor_style;

		}

		if ( ! empty( $block_type->script ) ) {

			$script_handles[] = $block_type->script;

		}

	}

	$style_handles = array_unique( $style_handles );

	$done          = wp_styles()->done;

	ob_start();

	// We do not need reset styles for the iframed editor.

	wp_styles()->done = array( 'wp-reset-editor-styles' );

	wp_styles()->do_items( $style_handles );

	wp_styles()->done = $done;

	$styles = ob_get_clean();

	$script_handles = array_unique( $script_handles );

	$done           = wp_scripts()->done;

	ob_start();

	wp_scripts()->done = array();

	wp_scripts()->do_items( $script_handles );

	wp_scripts()->done = $done;

	$scripts = ob_get_clean();

	return array(

		'styles'  => $styles,

		'scripts' => $scripts,

	);

}

/**

 * 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

	);

	$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;

		}

	}

	if ( WP_Theme_JSON_Resolver::theme_has_support() ) {

		$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;

		}

	}

	$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'] = isset( $colors_by_origin['custom'] ) ?

			$colors_by_origin['custom'] : (

				isset( $colors_by_origin['theme'] ) ?