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/**
 * 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(
			&#039;slug&#039;  =&gt; &#039;text&#039;,
			&#039;title&#039; =&gt; _x( &#039;Text&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;media&#039;,
			&#039;title&#039; =&gt; _x( &#039;Media&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;design&#039;,
			&#039;title&#039; =&gt; _x( &#039;Design&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;widgets&#039;,
			&#039;title&#039; =&gt; _x( &#039;Widgets&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;theme&#039;,
			&#039;title&#039; =&gt; _x( &#039;Theme&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;embed&#039;,
			&#039;title&#039; =&gt; _x( &#039;Embeds&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; null,
		),
		array(
			&#039;slug&#039;  =&gt; &#039;reusable&#039;,
			&#039;title&#039; =&gt; _x( &#039;Patterns&#039;, &#039;block category&#039; ),
			&#039;icon&#039;  =&gt; 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(
				&#039;post&#039; =&gt; $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( &#039;block_categories_all&#039;, $block_categories, $block_editor_context );

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

		/**
		 * Filters the default array of categories for block types.
		 *
		 * @since 5.0.0
		 * @deprecated 5.8.0 Use the {@see &#039;block_categories_all&#039;} filter instead.
		 *
		 * @param array[] $block_categories Array of categories for block types.
		 * @param WP_Post $post             Post being loaded.
		 */
		$block_categories = apply_filters_deprecated( &#039;block_categories&#039;, array( $block_categories, $post ), &#039;5.8.0&#039;, &#039;block_categories_all&#039; );
	}

	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( &#039;allowed_block_types_all&#039;, $allowed_block_types, $block_editor_context );

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

		/**
		 * Filters the allowed block types for the editor.
		 *
		 * @since 5.0.0
		 * @deprecated 5.8.0 Use the {@see &#039;allowed_block_types_all&#039;} 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( &#039;allowed_block_types&#039;, array( $allowed_block_types, $post ), &#039;5.8.0&#039;, &#039;allowed_block_types_all&#039; );
	}

	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( &#039;upload_files&#039; ) ) {
		$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(
		&#039;image_size_names_choose&#039;,
		array(
			&#039;thumbnail&#039; =&gt; __( &#039;Thumbnail&#039; ),
			&#039;medium&#039;    =&gt; __( &#039;Medium&#039; ),
			&#039;large&#039;     =&gt; __( &#039;Large&#039; ),
			&#039;full&#039;      =&gt; __( &#039;Full Size&#039; ),
		)
	);

	$available_image_sizes = array();
	foreach ( $image_size_names as $image_size_slug =&gt; $image_size_name ) {
		$available_image_sizes[] = array(
			&#039;slug&#039; =&gt; $image_size_slug,
			&#039;name&#039; =&gt; $image_size_name,
		);
	}

	$default_size       = get_option( &#039;image_default_size&#039;, &#039;large&#039; );
	$image_default_size = in_array( $default_size, array_keys( $image_size_names ), true ) ? $default_size : &#039;large&#039;;

	$image_dimensions = array();
	$all_sizes        = wp_get_registered_image_subsizes();
	foreach ( $available_image_sizes as $size ) {
		$key = $size[&#039;slug&#039;];
		if ( isset( $all_sizes[ $key ] ) ) {
			$image_dimensions[ $key ] = $all_sizes[ $key ];
		}
	}

	// These styles are used if the &quot;no theme styles&quot; options is triggered or on
	// themes without their own editor styles.
	$default_editor_styles_file = ABSPATH . WPINC . &#039;/css/dist/block-editor/default-editor-styles.css&#039;;

	static $default_editor_styles_file_contents = false;
	if ( ! $default_editor_styles_file_contents &amp;&amp; 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( &#039;css&#039; =&gt; $default_editor_styles_file_contents ),
		);
	}

	$editor_settings = array(
		&#039;alignWide&#039;                        =&gt; get_theme_support( &#039;align-wide&#039; ),
		&#039;allowedBlockTypes&#039;                =&gt; true,
		&#039;allowedMimeTypes&#039;                 =&gt; get_allowed_mime_types(),
		&#039;defaultEditorStyles&#039;              =&gt; $default_editor_styles,
		&#039;blockCategories&#039;                  =&gt; get_default_block_categories(),
		&#039;isRTL&#039;                            =&gt; is_rtl(),
		&#039;imageDefaultSize&#039;                 =&gt; $image_default_size,
		&#039;imageDimensions&#039;                  =&gt; $image_dimensions,
		&#039;imageEditing&#039;                     =&gt; true,
		&#039;imageSizes&#039;                       =&gt; $available_image_sizes,
		&#039;maxUploadFileSize&#039;                =&gt; $max_upload_size,
		// The following flag is required to enable the new Gallery block format on the mobile apps in 5.9.
		&#039;__unstableGalleryWithImageBlocks&#039; =&gt; true,
	);

	$theme_settings = get_classic_theme_supports_block_editor_settings();
	foreach ( $theme_settings as $key =&gt; $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[&#039;widgetTypesToHideFromLegacyWidgetBlock&#039;] = apply_filters(
		&#039;widget_types_to_hide_from_legacy_widget_block&#039;,
		array(
			&#039;pages&#039;,
			&#039;calendar&#039;,
			&#039;archives&#039;,
			&#039;media_audio&#039;,
			&#039;media_image&#039;,
			&#039;media_gallery&#039;,
			&#039;media_video&#039;,
			&#039;search&#039;,
			&#039;text&#039;,
			&#039;categories&#039;,
			&#039;recent-posts&#039;,
			&#039;recent-comments&#039;,
			&#039;rss&#039;,
			&#039;tag_cloud&#039;,
			&#039;custom_html&#039;,
			&#039;block&#039;,
		)
	);

	return $editor_settings;
}

/**
 * Collect the block editor assets that need to be loaded into the editor&#039;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&#039;t necessarily register them.
	 */
	$wp_styles-&gt;registered  = $current_wp_styles-&gt;registered;
	$wp_scripts-&gt;registered = $current_wp_scripts-&gt;registered;

	/*
	 * We generally do not need reset styles for the iframed editor.
	 * However, if it&#039;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-&gt;done =
		wp_theme_has_theme_json() ? array( &#039;wp-reset-editor-styles&#039; ) : array();

	wp_enqueue_script( &#039;wp-polyfill&#039; );
	// Enqueue the `editorStyle` handles for all core block, and dependencies.
	wp_enqueue_style( &#039;wp-edit-blocks&#039; );

	if ( current_theme_supports( &#039;wp-block-styles&#039; ) ) {
		wp_enqueue_style( &#039;wp-block-library-theme&#039; );
	}

	/*
	 * We don&#039;t want to load EDITOR scripts in the iframe, only enqueue
	 * front-end assets for the content.
	 */
	add_filter( &#039;should_load_block_editor_scripts_and_styles&#039;, &#039;__return_false&#039; );
	do_action( &#039;enqueue_block_assets&#039; );
	remove_filter( &#039;should_load_block_editor_scripts_and_styles&#039;, &#039;__return_false&#039; );

	$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-&gt;get_all_registered() as $block_type ) {
		if ( isset( $block_type-&gt;editor_style_handles ) &amp;&amp; is_array( $block_type-&gt;editor_style_handles ) ) {
			foreach ( $block_type-&gt;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( &#039;wp_print_styles&#039;, &#039;print_emoji_styles&#039; );
	if ( $has_emoji_styles ) {
		remove_action( &#039;wp_print_styles&#039;, &#039;print_emoji_styles&#039; );
	}

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

	if ( $has_emoji_styles ) {
		add_action( &#039;wp_print_styles&#039;, &#039;print_emoji_styles&#039; );
	}

	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(
		&#039;styles&#039;  =&gt; $styles,
		&#039;scripts&#039; =&gt; $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[&#039;blockName&#039;] ) {
			return $block;
		}
		if ( ! empty( $block[&#039;innerBlocks&#039;] ) ) {
			$found_block = wp_get_first_block( $block[&#039;innerBlocks&#039;], $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&#039;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      = &#039;singular&#039;;
		$page_slug      = &#039;singular&#039;;
		$template_types = get_block_templates();

		foreach ( $template_types as $template_type ) {
			if ( &#039;page&#039; === $template_type-&gt;slug ) {
				$page_slug = &#039;page&#039;;
			}
			if ( &#039;single&#039; === $template_type-&gt;slug ) {
				$post_slug = &#039;single&#039;;
			}
		}

		$what_post_type = get_post_type( $post_ID );
		switch ( $what_post_type ) {
			case &#039;page&#039;:
				$template_slug = $page_slug;
				break;
			default:
				$template_slug = $post_slug;
				break;
		}
	}

	$current_template = get_block_templates( array( &#039;slug__in&#039; =&gt; array( $template_slug ) ) );

	if ( ! empty( $current_template ) ) {
		$template_blocks    = parse_blocks( $current_template[0]-&gt;content );
		$post_content_block = wp_get_first_block( $template_blocks, &#039;core/post-content&#039; );

		if ( isset( $post_content_block[&#039;attrs&#039;] ) ) {
			return $post_content_block[&#039;attrs&#039;];
		}
	}

	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(
			&#039;allowedBlockTypes&#039; =&gt; get_allowed_block_types( $block_editor_context ),
			&#039;blockCategories&#039;   =&gt; get_block_categories( $block_editor_context ),
		),
		$custom_settings
	);

	$global_styles = array();
	$presets       = array(
		array(
			&#039;css&#039;            =&gt; &#039;variables&#039;,
			&#039;__unstableType&#039; =&gt; &#039;presets&#039;,
			&#039;isGlobalStyles&#039; =&gt; true,
		),
		array(
			&#039;css&#039;            =&gt; &#039;presets&#039;,
			&#039;__unstableType&#039; =&gt; &#039;presets&#039;,
			&#039;isGlobalStyles&#039; =&gt; true,
		),
	);
	foreach ( $presets as $preset_style ) {
		$actual_css = wp_get_global_stylesheet( array( $preset_style[&#039;css&#039;] ) );
		if ( &#039;&#039; !== $actual_css ) {
			$preset_style[&#039;css&#039;] = $actual_css;
			$global_styles[]     = $preset_style;
		}
	}

	if ( wp_theme_has_theme_json() ) {
		$block_classes = array(
			&#039;css&#039;            =&gt; &#039;styles&#039;,
			&#039;__unstableType&#039; =&gt; &#039;theme&#039;,
			&#039;isGlobalStyles&#039; =&gt; true,
		);
		$actual_css    = wp_get_global_stylesheet( array( $block_classes[&#039;css&#039;] ) );
		if ( &#039;&#039; !== $actual_css ) {
			$block_classes[&#039;css&#039;] = $actual_css;
			$global_styles[]      = $block_classes;
		}

		/*
		 * Add the custom CSS as a separate stylesheet so any invalid CSS
		 * entered by users does not break other global styles.
		 */
		$global_styles[] = array(
			&#039;css&#039;            =&gt; wp_get_global_styles_custom_css(),
			&#039;__unstableType&#039; =&gt; &#039;user&#039;,
			&#039;isGlobalStyles&#039; =&gt; true,
		);
	} else {
		// If there is no `theme.json` file, ensure base layout styles are still available.
		$block_classes = array(
			&#039;css&#039;            =&gt; &#039;base-layout-styles&#039;,
			&#039;__unstableType&#039; =&gt; &#039;base-layout&#039;,
			&#039;isGlobalStyles&#039; =&gt; true,
		);
		$actual_css    = wp_get_global_stylesheet( array( $block_classes[&#039;css&#039;] ) );
		if ( &#039;&#039; !== $actual_css ) {
			$block_classes[&#039;css&#039;] = $actual_css;
			$global_styles[]      = $block_classes;
		}
	}

	$editor_settings[&#039;styles&#039;] = array_merge( $global_styles, get_block_editor_theme_styles() );

	$editor_settings[&#039;__experimentalFeatures&#039;] = wp_get_global_settings();
	// These settings may need to be updated based on data coming from theme.json sources.
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;palette&#039;] ) ) {
		$colors_by_origin          = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;palette&#039;];
		$editor_settings[&#039;colors&#039;] = isset( $colors_by_origin[&#039;custom&#039;] ) ?
			$colors_by_origin[&#039;custom&#039;] : (
				isset( $colors_by_origin[&#039;theme&#039;] ) ?
					$colors_by_origin[&#039;theme&#039;] :
					$colors_by_origin[&#039;default&#039;]
			);
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;gradients&#039;] ) ) {
		$gradients_by_origin          = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;gradients&#039;];
		$editor_settings[&#039;gradients&#039;] = isset( $gradients_by_origin[&#039;custom&#039;] ) ?
			$gradients_by_origin[&#039;custom&#039;] : (
				isset( $gradients_by_origin[&#039;theme&#039;] ) ?
					$gradients_by_origin[&#039;theme&#039;] :
					$gradients_by_origin[&#039;default&#039;]
			);
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;fontSizes&#039;] ) ) {
		$font_sizes_by_origin         = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;fontSizes&#039;];
		$editor_settings[&#039;fontSizes&#039;] = isset( $font_sizes_by_origin[&#039;custom&#039;] ) ?
			$font_sizes_by_origin[&#039;custom&#039;] : (
				isset( $font_sizes_by_origin[&#039;theme&#039;] ) ?
					$font_sizes_by_origin[&#039;theme&#039;] :
					$font_sizes_by_origin[&#039;default&#039;]
			);
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;custom&#039;] ) ) {
		$editor_settings[&#039;disableCustomColors&#039;] = ! $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;custom&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;custom&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;customGradient&#039;] ) ) {
		$editor_settings[&#039;disableCustomGradients&#039;] = ! $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;customGradient&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;color&#039;][&#039;customGradient&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;customFontSize&#039;] ) ) {
		$editor_settings[&#039;disableCustomFontSizes&#039;] = ! $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;customFontSize&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;customFontSize&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;lineHeight&#039;] ) ) {
		$editor_settings[&#039;enableCustomLineHeight&#039;] = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;lineHeight&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;typography&#039;][&#039;lineHeight&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;units&#039;] ) ) {
		$editor_settings[&#039;enableCustomUnits&#039;] = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;units&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;units&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;padding&#039;] ) ) {
		$editor_settings[&#039;enableCustomSpacing&#039;] = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;padding&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;padding&#039;] );
	}
	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;customSpacingSize&#039;] ) ) {
		$editor_settings[&#039;disableCustomSpacingSizes&#039;] = ! $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;customSpacingSize&#039;];
		unset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;customSpacingSize&#039;] );
	}

	if ( isset( $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;spacingSizes&#039;] ) ) {
		$spacing_sizes_by_origin         = $editor_settings[&#039;__experimentalFeatures&#039;][&#039;spacing&#039;][&#039;spacingSizes&#039;];
		$editor_settings[&#039;spacingSizes&#039;] = isset( $spacing_sizes_by_origin[&#039;custom&#039;] ) ?
			$spacing_sizes_by_origin[&#039;custom&#039;] : (
				isset( $spacing_sizes_by_origin[&#039;theme&#039;] ) ?
					$spacing_sizes_by_origin[&#039;theme&#039;] :
					$spacing_sizes_by_origin[&#039;default&#039;]
			);
	}

	$editor_settings[&#039;__unstableResolvedAssets&#039;]         = _wp_get_iframed_editor_assets();
	$editor_settings[&#039;__unstableIsBlockBasedTheme&#039;]      = wp_is_block_theme();
	$editor_settings[&#039;localAutosaveInterval&#039;]            = 15;
	$editor_settings[&#039;disableLayoutStyles&#039;]              = current_theme_supports( &#039;disable-layout-styles&#039; );
	$editor_settings[&#039;__experimentalDiscussionSettings&#039;] = array(
		&#039;commentOrder&#039;         =&gt; get_option( &#039;comment_order&#039; ),
		&#039;commentsPerPage&#039;      =&gt; get_option( &#039;comments_per_page&#039; ),
		&#039;defaultCommentsPage&#039;  =&gt; get_option( &#039;default_comments_page&#039; ),
		&#039;pageComments&#039;         =&gt; get_option( &#039;page_comments&#039; ),
		&#039;threadComments&#039;       =&gt; get_option( &#039;thread_comments&#039; ),
		&#039;threadCommentsDepth&#039;  =&gt; get_option( &#039;thread_comments_depth&#039; ),
		&#039;defaultCommentStatus&#039; =&gt; get_option( &#039;default_comment_status&#039; ),
		&#039;avatarURL&#039;            =&gt; get_avatar_url(
			&#039;&#039;,
			array(
				&#039;size&#039;          =&gt; 96,
				&#039;force_default&#039; =&gt; true,
				&#039;default&#039;       =&gt; get_option( &#039;avatar_default&#039; ),
			)
		),
	);

	$post_content_block_attributes = wp_get_post_content_block_attributes();

	if ( isset( $post_content_block_attributes ) ) {
		$editor_settings[&#039;postContentAttributes&#039;] = $post_content_block_attributes;
	}

	/**
	 * 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( &#039;block_editor_settings_all&#039;, $editor_settings, $block_editor_context );

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

		/**
		 * Filters the settings to pass to the block editor.
		 *
		 * @since 5.0.0
		 * @deprecated 5.8.0 Use the {@see &#039;block_editor_settings_all&#039;} filter instead.
		 *
		 * @param array   $editor_settings Default editor settings.
		 * @param WP_Post $post            Post being edited.
		 */
		$editor_settings = apply_filters_deprecated( &#039;block_editor_settings&#039;, array( $editor_settings, $post ), &#039;5.8.0&#039;, &#039;block_editor_settings_all&#039; );
	}

	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( &#039;block_editor_rest_api_preload_paths&#039;, $preload_paths, $block_editor_context );

	if ( ! empty( $block_editor_context-&gt;post ) ) {
		$selected_post = $block_editor_context-&gt;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 &#039;block_editor_rest_api_preload_paths&#039;} 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( &#039;block_editor_preload_paths&#039;, array( $preload_paths, $selected_post ), &#039;5.8.0&#039;, &#039;block_editor_rest_api_preload_paths&#039; );
	}

	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 ( $preload_paths as &amp;$path ) {
		if ( is_string( $path ) &amp;&amp; ! str_starts_with( $path, &#039;/&#039; ) ) {
			$path = &#039;/&#039; . $path;
			continue;
		}

		if ( is_array( $path ) &amp;&amp; is_string( $path[0] ) &amp;&amp; ! str_starts_with( $path[0], &#039;/&#039; ) ) {
			$path[0] = &#039;/&#039; . $path[0];
		}
	}

	unset( $path );

	$preload_data = array_reduce(
		$preload_paths,
		&#039;rest_preload_api_request&#039;,
		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(
		&#039;wp-api-fetch&#039;,
		sprintf(
			&#039;wp.apiFetch.use( wp.apiFetch.createPreloadingMiddleware( %s ) );&#039;,
			wp_json_encode( $preload_data )
		),
		&#039;after&#039;
	);
}

/**
 * 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 &amp;&amp; current_theme_supports( &#039;editor-styles&#039; ) ) {
		foreach ( $editor_styles as $style ) {
			if ( preg_match( &#039;~^(https?:)?//~&#039;, $style ) ) {
				$response = wp_remote_get( $style );
				if ( ! is_wp_error( $response ) ) {
					$styles[] = array(
						&#039;css&#039;            =&gt; wp_remote_retrieve_body( $response ),
						&#039;__unstableType&#039; =&gt; &#039;theme&#039;,
						&#039;isGlobalStyles&#039; =&gt; false,
					);
				}
			} else {
				$file = get_theme_file_path( $style );
				if ( is_file( $file ) ) {
					$styles[] = array(
						&#039;css&#039;            =&gt; file_get_contents( $file ),
						&#039;baseURL&#039;        =&gt; get_theme_file_uri( $style ),
						&#039;__unstableType&#039; =&gt; &#039;theme&#039;,
						&#039;isGlobalStyles&#039; =&gt; false,
					);
				}
			}
		}
	}

	return $styles;
}

/**
 * Returns the classic theme supports settings for block editor.
 *
 * @since 6.2.0
 * @since 6.6.0 Add support for &#039;editor-spacing-sizes&#039; theme support.
 *
 * @return array The classic theme supports settings.
 */
function get_classic_theme_supports_block_editor_settings() {
	$theme_settings = array(
		&#039;disableCustomColors&#039;    =&gt; get_theme_support( &#039;disable-custom-colors&#039; ),
		&#039;disableCustomFontSizes&#039; =&gt; get_theme_support( &#039;disable-custom-font-sizes&#039; ),
		&#039;disableCustomGradients&#039; =&gt; get_theme_support( &#039;disable-custom-gradients&#039; ),
		&#039;disableLayoutStyles&#039;    =&gt; get_theme_support( &#039;disable-layout-styles&#039; ),
		&#039;enableCustomLineHeight&#039; =&gt; get_theme_support( &#039;custom-line-height&#039; ),
		&#039;enableCustomSpacing&#039;    =&gt; get_theme_support( &#039;custom-spacing&#039; ),
		&#039;enableCustomUnits&#039;      =&gt; get_theme_support( &#039;custom-units&#039; ),
	);

	// Theme settings.
	$color_palette = current( (array) get_theme_support( &#039;editor-color-palette&#039; ) );
	if ( false !== $color_palette ) {
		$theme_settings[&#039;colors&#039;] = $color_palette;
	}

	$font_sizes = current( (array) get_theme_support( &#039;editor-font-sizes&#039; ) );
	if ( false !== $font_sizes ) {
		$theme_settings[&#039;fontSizes&#039;] = $font_sizes;
	}

	$gradient_presets = current( (array) get_theme_support( &#039;editor-gradient-presets&#039; ) );
	if ( false !== $gradient_presets ) {
		$theme_settings[&#039;gradients&#039;] = $gradient_presets;
	}

	$spacing_sizes = current( (array) get_theme_support( &#039;editor-spacing-sizes&#039; ) );
	if ( false !== $spacing_sizes ) {
		$theme_settings[&#039;spacingSizes&#039;] = $spacing_sizes;
	}

	return $theme_settings;
}
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