<?php

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/**

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* Used to set up all core blocks used with the block editor.

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*

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* @package WordPress

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*/

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// Don't load directly.

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if ( ! defined( 'ABSPATH' ) ) {

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die( '-1' );

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}

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define( 'BLOCKS_PATH', ABSPATH . WPINC . '/blocks/' );

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// Include files required for core blocks registration.

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require BLOCKS_PATH . 'legacy-widget.php';

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require BLOCKS_PATH . 'widget-group.php';

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require BLOCKS_PATH . 'require-dynamic-blocks.php';

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/**

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* Registers core block style handles.

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*

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* While {@see register_block_style_handle()} is typically used for that, the way it is

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* implemented is inefficient for core block styles. Registering those style handles here

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* avoids unnecessary logic and filesystem lookups in the other function.

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*

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* @since 6.3.0

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*/

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function register_core_block_style_handles() {

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$wp_version = wp_get_wp_version();

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if ( ! wp_should_load_separate_core_block_assets() ) {

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return;

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}

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$blocks_url = includes_url( 'blocks/' );

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$suffix = wp_scripts_get_suffix();

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$wp_styles = wp_styles();

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$style_fields = array(

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'style' => 'style',

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'editorStyle' => 'editor',

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);

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static $core_blocks_meta;

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if ( ! $core_blocks_meta ) {

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$core_blocks_meta = require BLOCKS_PATH . 'blocks-json.php';

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}

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$files = false;

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$transient_name = 'wp_core_block_css_files';

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/*

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* Ignore transient cache when the development mode is set to 'core'. Why? To avoid interfering with

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* the core developer's workflow.

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*/

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$can_use_cached = ! wp_is_development_mode( 'core' );

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if ( $can_use_cached ) {

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$cached_files = get_transient( $transient_name );

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// Check the validity of cached values by checking against the current WordPress version.

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if (

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is_array( $cached_files )

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&& isset( $cached_files['version'] )

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&& $cached_files['version'] === $wp_version

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&& isset( $cached_files['files'] )

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) {

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$files = $cached_files['files'];

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}

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}

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if ( ! $files ) {

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$files = glob( wp_normalize_path( BLOCKS_PATH . '**/**.css' ) );

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// Normalize BLOCKS_PATH prior to substitution for Windows environments.

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$normalized_blocks_path = wp_normalize_path( BLOCKS_PATH );

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$files = array_map(

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static function ( $file ) use ( $normalized_blocks_path ) {

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return str_replace( $normalized_blocks_path, '', $file );

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},

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$files

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);

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// Save core block style paths in cache when not in development mode.

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if ( $can_use_cached ) {

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set_transient(

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$transient_name,

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array(

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'version' => $wp_version,

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'files' => $files,

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)

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);

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}

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}

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$register_style = static function ( $name, $filename, $style_handle ) use ( $blocks_url, $suffix, $wp_styles, $files ) {

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$style_path = "{$name}/{$filename}{$suffix}.css";

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$path = wp_normalize_path( BLOCKS_PATH . $style_path );

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if ( ! in_array( $style_path, $files, true ) ) {

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$wp_styles->add(

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$style_handle,

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false

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);

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return;

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}

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$wp_styles->add( $style_handle, $blocks_url . $style_path );

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$wp_styles->add_data( $style_handle, 'path', $path );

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$rtl_file = "{$name}/{$filename}-rtl{$suffix}.css";

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if ( is_rtl() && in_array( $rtl_file, $files, true ) ) {

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$wp_styles->add_data( $style_handle, 'rtl', 'replace' );

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$wp_styles->add_data( $style_handle, 'suffix', $suffix );

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$wp_styles->add_data( $style_handle, 'path', str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $path ) );

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}

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};

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foreach ( $core_blocks_meta as $name => $schema ) {

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/** This filter is documented in wp-includes/blocks.php */

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$schema = apply_filters( 'block_type_metadata', $schema );

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// Backfill these properties similar to `register_block_type_from_metadata()`.

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if ( ! isset( $schema['style'] ) ) {

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$schema['style'] = "wp-block-{$name}";

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}

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if ( ! isset( $schema['editorStyle'] ) ) {

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$schema['editorStyle'] = "wp-block-{$name}-editor";

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}

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// Register block theme styles.

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$register_style( $name, 'theme', "wp-block-{$name}-theme" );

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foreach ( $style_fields as $style_field => $filename ) {

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$style_handle = $schema[ $style_field ];

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if ( is_array( $style_handle ) ) {

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continue;

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}

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$register_style( $name, $filename, $style_handle );

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}

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}

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}

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add_action( 'init', 'register_core_block_style_handles', 9 );

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/**

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* Registers core block types using metadata files.

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* Dynamic core blocks are registered separately.

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*

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* @since 5.5.0

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*/

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function register_core_block_types_from_metadata() {

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$block_folders = require BLOCKS_PATH . 'require-static-blocks.php';

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foreach ( $block_folders as $block_folder ) {

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register_block_type_from_metadata(

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BLOCKS_PATH . $block_folder

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);

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}

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}

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add_action( 'init', 'register_core_block_types_from_metadata' );

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/**

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* Registers the core block metadata collection.

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*

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* This function is hooked into the 'init' action with a priority of 9,

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* ensuring that the core block metadata is registered before the regular

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* block initialization that happens at priority 10.

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*

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* @since 6.7.0

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*/

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function wp_register_core_block_metadata_collection() {

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wp_register_block_metadata_collection(

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BLOCKS_PATH,

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BLOCKS_PATH . 'blocks-json.php'

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);

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}

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add_action( 'init', 'wp_register_core_block_metadata_collection', 9 );

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