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classic-editor.php

<?php
/**
 * Classic Editor
 *
 * Plugin Name: Classic Editor
 * Plugin URI:  https://wordpress.org/plugins/classic-editor/
 * Description: Enables the WordPress classic editor and the old-style Edit Post screen with TinyMCE, Meta Boxes, etc. Supports the older plugins that extend this screen.
 * Version:     1.6.3
 * Author:      WordPress Contributors
 * Author URI:  https://github.com/WordPress/classic-editor/
 * License:     GPLv2 or later
 * License URI: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * Text Domain: classic-editor
 * Domain Path: /languages
 * Requires at least: 4.9
 * Requires PHP: 5.2.4
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License version 2, as published by the Free Software Foundation. You may NOT assume
 * that you can use any other version of the GPL.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

if ( ! defined( 'ABSPATH' ) ) {
	die( 'Invalid request.' );
}

if ( ! class_exists( 'Classic_Editor' ) ) :
class Classic_Editor {
	private static $settings;
	private static $supported_post_types = array();

private function __construct() {}

public static function init_actions() {
		$block_editor = has_action( 'enqueue_block_assets' );
		$gutenberg = function_exists( 'gutenberg_register_scripts_and_styles' );

register_activation_hook( __FILE__, array( __CLASS__, 'activate' ) );

$settings = self::get_settings();

if ( is_multisite() ) {
			add_action( 'wpmu_options', array( __CLASS__, 'network_settings' ) );
			add_action( 'update_wpmu_options', array( __CLASS__, 'save_network_settings' ) );
		}

if ( ! $settings['hide-settings-ui'] ) {
			// Add a link to the plugin's settings and/or network admin settings in the plugins list table.
			add_filter( 'plugin_action_links', array( __CLASS__, 'add_settings_link' ), 10, 2 );
			add_filter( 'network_admin_plugin_action_links', array( __CLASS__, 'add_settings_link' ), 10, 2 );

add_action( 'admin_init', array( __CLASS__, 'register_settings' ) );

if ( $settings['allow-users'] ) {
				// User settings.
				add_action( 'personal_options_update', array( __CLASS__, 'save_user_settings' ) );
				add_action( 'profile_personal_options', array( __CLASS__, 'user_settings' ) );
			}
		}

// Always remove the "Try Gutenberg" dashboard widget. See https://core.trac.wordpress.org/ticket/44635.
		remove_action( 'try_gutenberg_panel', 'wp_try_gutenberg_panel' );

if ( ! $block_editor && ! $gutenberg  ) {
			return;
		}

if ( $settings['allow-users'] ) {
			// Also used in Gutenberg.
			add_filter( 'use_block_editor_for_post', array( __CLASS__, 'choose_editor' ), 100, 2 );

if ( $gutenberg ) {
				// Support older Gutenberg versions.
				add_filter( 'gutenberg_can_edit_post', array( __CLASS__, 'choose_editor' ), 100, 2 );

if ( $settings['editor'] === 'classic' ) {
					self::remove_gutenberg_hooks( 'some' );
				}
			}

add_filter( 'get_edit_post_link', array( __CLASS__, 'get_edit_post_link' ) );
			add_filter( 'redirect_post_location', array( __CLASS__, 'redirect_location' ) );
			add_action( 'edit_form_top', array( __CLASS__, 'add_redirect_helper' ) );
			add_action( 'admin_head-edit.php', array( __CLASS__, 'add_edit_php_inline_style' ) );

add_action( 'edit_form_top', array( __CLASS__, 'remember_classic_editor' ) );

if ( version_compare( $GLOBALS['wp_version'], '5.8', '>=' ) ) {
				add_filter( 'block_editor_settings_all', array( __CLASS__, 'remember_block_editor' ), 10, 2 );
			} else {
				add_filter( 'block_editor_settings', array( __CLASS__, 'remember_block_editor' ), 10, 2 );
			}

// Post state (edit.php)
			add_filter( 'display_post_states', array( __CLASS__, 'add_post_state' ), 10, 2 );
			// Row actions (edit.php)
			add_filter( 'page_row_actions', array( __CLASS__, 'add_edit_links' ), 15, 2 );
			add_filter( 'post_row_actions', array( __CLASS__, 'add_edit_links' ), 15, 2 );

// Switch editors while editing a post
			add_action( 'add_meta_boxes', array( __CLASS__, 'add_meta_box' ), 10, 2 );
			add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'enqueue_block_editor_scripts' ) );
		} else {
			if ( $settings['editor'] === 'classic' ) {
				// Also used in Gutenberg.
				// Consider disabling other Block Editor functionality.
				add_filter( 'use_block_editor_for_post_type', '__return_false', 100 );

if ( $gutenberg ) {
					// Support older Gutenberg versions.
					add_filter( 'gutenberg_can_edit_post_type', '__return_false', 100 );
					self::remove_gutenberg_hooks();
				}
			} else {
				// $settings['editor'] === 'block', nothing to do :)
				return;
			}
		}

if ( $block_editor ) {
			// Move the Privacy Page notice back under the title.
			add_action( 'admin_init', array( __CLASS__, 'on_admin_init' ) );
		}
		if ( $gutenberg ) {
			// These are handled by this plugin. All are older, not used in 5.3+.
			remove_action( 'admin_init', 'gutenberg_add_edit_link_filters' );
			remove_action( 'admin_print_scripts-edit.php', 'gutenberg_replace_default_add_new_button' );
			remove_filter( 'redirect_post_location', 'gutenberg_redirect_to_classic_editor_when_saving_posts' );
			remove_filter( 'display_post_states', 'gutenberg_add_gutenberg_post_state' );
			remove_action( 'edit_form_top', 'gutenberg_remember_classic_editor_when_saving_posts' );
		}
	}

public static function remove_gutenberg_hooks( $remove = 'all' ) {
		remove_action( 'admin_menu', 'gutenberg_menu' );
		remove_action( 'admin_init', 'gutenberg_redirect_demo' );

if ( $remove !== 'all' ) {
			return;
		}

// Gutenberg 5.3+
		remove_action( 'wp_enqueue_scripts', 'gutenberg_register_scripts_and_styles' );
		remove_action( 'admin_enqueue_scripts', 'gutenberg_register_scripts_and_styles' );
		remove_action( 'admin_notices', 'gutenberg_wordpress_version_notice' );
		remove_action( 'rest_api_init', 'gutenberg_register_rest_widget_updater_routes' );
		remove_action( 'admin_print_styles', 'gutenberg_block_editor_admin_print_styles' );
		remove_action( 'admin_print_scripts', 'gutenberg_block_editor_admin_print_scripts' );
		remove_action( 'admin_print_footer_scripts', 'gutenberg_block_editor_admin_print_footer_scripts' );
		remove_action( 'admin_footer', 'gutenberg_block_editor_admin_footer' );
		remove_action( 'admin_enqueue_scripts', 'gutenberg_widgets_init' );
		remove_action( 'admin_notices', 'gutenberg_build_files_notice' );

remove_filter( 'load_script_translation_file', 'gutenberg_override_translation_file' );
		remove_filter( 'block_editor_settings', 'gutenberg_extend_block_editor_styles' );
		remove_filter( 'default_content', 'gutenberg_default_demo_content' );
		remove_filter( 'default_title', 'gutenberg_default_demo_title' );
		remove_filter( 'block_editor_settings', 'gutenberg_legacy_widget_settings' );
		remove_filter( 'rest_request_after_callbacks', 'gutenberg_filter_oembed_result' );

// Previously used, compat for older Gutenberg versions.
		remove_filter( 'wp_refresh_nonces', 'gutenberg_add_rest_nonce_to_heartbeat_response_headers' );
		remove_filter( 'get_edit_post_link', 'gutenberg_revisions_link_to_editor' );
		remove_filter( 'wp_prepare_revision_for_js', 'gutenberg_revisions_restore' );

remove_action( 'rest_api_init', 'gutenberg_register_rest_routes' );
		remove_action( 'rest_api_init', 'gutenberg_add_taxonomy_visibility_field' );
		remove_filter( 'registered_post_type', 'gutenberg_register_post_prepare_functions' );

remove_action( 'do_meta_boxes', 'gutenberg_meta_box_save' );
		remove_action( 'submitpost_box', 'gutenberg_intercept_meta_box_render' );
		remove_action( 'submitpage_box', 'gutenberg_intercept_meta_box_render' );
		remove_action( 'edit_page_form', 'gutenberg_intercept_meta_box_render' );
		remove_action( 'edit_form_advanced', 'gutenberg_intercept_meta_box_render' );
		remove_filter( 'redirect_post_location', 'gutenberg_meta_box_save_redirect' );
		remove_filter( 'filter_gutenberg_meta_boxes', 'gutenberg_filter_meta_boxes' );

remove_filter( 'body_class', 'gutenberg_add_responsive_body_class' );
		remove_filter( 'admin_url', 'gutenberg_modify_add_new_button_url' ); // old
		remove_action( 'admin_enqueue_scripts', 'gutenberg_check_if_classic_needs_warning_about_blocks' );
		remove_filter( 'register_post_type_args', 'gutenberg_filter_post_type_labels' );

// phpcs:disable Squiz.PHP.CommentedOutCode.Found
		// Keep
		// remove_filter( 'wp_kses_allowed_html', 'gutenberg_kses_allowedtags', 10, 2 ); // not needed in 5.0
		// remove_filter( 'bulk_actions-edit-wp_block', 'gutenberg_block_bulk_actions' );
		// remove_filter( 'wp_insert_post_data', 'gutenberg_remove_wpcom_markdown_support' );
		// remove_filter( 'the_content', 'do_blocks', 9 );
		// remove_action( 'init', 'gutenberg_register_post_types' );

// Continue to manage wpautop for posts that were edited in Gutenberg.
		// remove_filter( 'wp_editor_settings', 'gutenberg_disable_editor_settings_wpautop' );
		// remove_filter( 'the_content', 'gutenberg_wpautop', 8 );
		// phpcs:enable Squiz.PHP.CommentedOutCode.Found

}

private static function get_settings( $refresh = 'no' ) {
		/**
		 * Can be used to override the plugin's settings. Always hides the settings UI when used (as users cannot change the settings).
		 *
		 * Has to return an associative array with two keys.
		 * The defaults are:
		 *   'editor' => 'classic', // Accepted values: 'classic', 'block'.
		 *   'allow-users' => false,
		 *
		 * @param boolean To override the settings return an array with the above keys.
		 */
		$settings = apply_filters( 'classic_editor_plugin_settings', false );

if ( is_array( $settings ) ) {
			return array(
				'editor' => ( isset( $settings['editor'] ) && $settings['editor'] === 'block' ) ? 'block' : 'classic',
				'allow-users' => ! empty( $settings['allow-users'] ),
				'hide-settings-ui' => true,
			);
		}

if ( ! empty( self::$settings ) && $refresh === 'no' ) {
			return self::$settings;
		}

if ( is_multisite() ) {
			$defaults = array(
				'editor' => get_network_option( null, 'classic-editor-replace' ) === 'block' ? 'block' : 'classic',
				'allow-users' => false,
			);

/**
			 * Filters the default network options.
			 *
			 * @param array $defaults The default options array. See `classic_editor_plugin_settings` for supported keys and values.
			 */
			$defaults = apply_filters( 'classic_editor_network_default_settings', $defaults );

if ( get_network_option( null, 'classic-editor-allow-sites' ) !== 'allow' ) {
				// Per-site settings are disabled. Return default network options nad hide the settings UI.
				$defaults['hide-settings-ui'] = true;
				return $defaults;
			}

// Override with the site options.
			$editor_option = get_option( 'classic-editor-replace' );
			$allow_users_option = get_option( 'classic-editor-allow-users' );

if ( $editor_option ) {
				$defaults['editor'] = $editor_option;
			}
			if ( $allow_users_option ) {
				$defaults['allow-users'] = ( $allow_users_option === 'allow' );
			}

$editor = ( isset( $defaults['editor'] ) && $defaults['editor'] === 'block' ) ? 'block' : 'classic';
			$allow_users = ! empty( $defaults['allow-users'] );
		} else {
			$allow_users = ( get_option( 'classic-editor-allow-users' ) === 'allow' );
			$option = get_option( 'classic-editor-replace' );

// Normalize old options.
			if ( $option === 'block' || $option === 'no-replace' ) {
				$editor = 'block';
			} else {
				// empty( $option ) || $option === 'classic' || $option === 'replace'
				$editor = 'classic';
			}
		}

// Override the defaults with the user options.
		if ( ( ! isset( $GLOBALS['pagenow'] ) || $GLOBALS['pagenow'] !== 'options-writing.php' ) && $allow_users ) {
			$user_options = get_user_option( 'classic-editor-settings' );

if ( $user_options === 'block' || $user_options === 'classic' ) {
				$editor = $user_options;
			}
		}

self::$settings = array(
			'editor' => $editor,
			'hide-settings-ui' => false,
			'allow-users' => $allow_users,
		);

return self::$settings;
	}

private static function is_classic( $post_id = 0 ) {
		if ( ! $post_id ) {
			$post_id = self::get_edited_post_id();
		}

if ( $post_id ) {
			$settings = self::get_settings();

if ( $settings['allow-users'] && ! isset( $_GET['classic-editor__forget'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$which = get_post_meta( $post_id, 'classic-editor-remember', true );

if ( $which ) {
					// The editor choice will be "remembered" when the post is opened in either the classic or the block editor.
					if ( 'classic-editor' === $which ) {
						return true;
					} elseif ( 'block-editor' === $which ) {
						return false;
					}
				}

return ( ! self::has_blocks( $post_id ) );
			}
		}

if ( isset( $_GET['classic-editor'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return true;
		}

return false;
	}

/**
	 * Get the edited post ID (early) when loading the Edit Post screen.
	 */
	private static function get_edited_post_id() {
		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		if (
			! empty( $_GET['post'] ) &&
			! empty( $_GET['action'] ) &&
			$_GET['action'] === 'edit' &&
			! empty( $GLOBALS['pagenow'] ) &&
			$GLOBALS['pagenow'] === 'post.php'
		) {
			return (int) $_GET['post']; // post_ID
		}
		// phpcs:enable WordPress.Security.NonceVerification.Recommended

return 0;
	}

public static function register_settings() {
		// Add an option to Settings -> Writing
		register_setting( 'writing', 'classic-editor-replace', array(
			'sanitize_callback' => array( __CLASS__, 'validate_option_editor' ),
		) );

register_setting( 'writing', 'classic-editor-allow-users', array(
			'sanitize_callback' => array( __CLASS__, 'validate_option_allow_users' ),
		) );

$allowed_options = array(
			'writing' => array(
				'classic-editor-replace',
				'classic-editor-allow-users'
			),
		);

if ( function_exists( 'add_allowed_options' ) ) {
			add_allowed_options( $allowed_options );
		} else {
			add_option_whitelist( $allowed_options );
		}

$heading_1 = __( 'Default editor for all users', 'classic-editor' );
		$heading_2 = __( 'Allow users to switch editors', 'classic-editor' );

add_settings_field( 'classic-editor-1', $heading_1, array( __CLASS__, 'settings_1' ), 'writing' );
		add_settings_field( 'classic-editor-2', $heading_2, array( __CLASS__, 'settings_2' ), 'writing' );
	}

public static function save_user_settings( $user_id ) {
		if (
			isset( $_POST['classic-editor-user-settings'] ) &&
			isset( $_POST['classic-editor-replace'] ) &&
			wp_verify_nonce( $_POST['classic-editor-user-settings'], 'allow-user-settings' ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		) {
			$user_id = (int) $user_id;

if ( $user_id !== get_current_user_id() && ! current_user_can( 'edit_user', $user_id ) ) {
				return;
			}

$editor = self::validate_option_editor( $_POST['classic-editor-replace'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
			update_user_option( $user_id, 'classic-editor-settings', $editor );
		}
	}

/**
	 * Validate
	 */
	public static function validate_option_editor( $value ) {
		if ( $value === 'block' ) {
			return 'block';
		}

return 'classic';
	}

public static function validate_option_allow_users( $value ) {
		if ( $value === 'allow' ) {
			return 'allow';
		}

return 'disallow';
	}

public static function settings_1() {
		$settings = self::get_settings( 'refresh' );

?>
		<div class="classic-editor-options">
			<p>
				<input type="radio" name="classic-editor-replace" id="classic-editor-classic" value="classic"<?php if ( $settings['editor'] === 'classic' ) echo ' checked'; ?> />
				<label for="classic-editor-classic"><?php _ex( 'Classic editor', 'Editor Name', 'classic-editor' ); ?></label>
			</p>
			<p>
				<input type="radio" name="classic-editor-replace" id="classic-editor-block" value="block"<?php if ( $settings['editor'] !== 'classic' ) echo ' checked'; ?> />
				<label for="classic-editor-block"><?php _ex( 'Block editor', 'Editor Name', 'classic-editor' ); ?></label>
			</p>
		</div>
		<script>
		jQuery( 'document' ).ready( function( $ ) {
			if ( window.location.hash === '#classic-editor-options' ) {
				$( '.classic-editor-options' ).closest( 'td' ).addClass( 'highlight' );
			}
		} );
		</script>
		<?php
	}

public static function settings_2() {
		$settings = self::get_settings( 'refresh' );

?>
		<div class="classic-editor-options">
			<p>
				<input type="radio" name="classic-editor-allow-users" id="classic-editor-allow" value="allow"<?php if ( $settings['allow-users'] ) echo ' checked'; ?> />
				<label for="classic-editor-allow"><?php _e( 'Yes', 'classic-editor' ); ?></label>
			</p>
			<p>
				<input type="radio" name="classic-editor-allow-users" id="classic-editor-disallow" value="disallow"<?php if ( ! $settings['allow-users'] ) echo ' checked'; ?> />
				<label for="classic-editor-disallow"><?php _e( 'No', 'classic-editor' ); ?></label>
			</p>
		</div>
		<?php
	}

/**
	 * Shown on the Profile page when allowed by admin.
	 */
	public static function user_settings() {
		global $user_can_edit;
		$settings = self::get_settings( 'update' );

if (
			! defined( 'IS_PROFILE_PAGE' ) ||
			! IS_PROFILE_PAGE ||
			! $user_can_edit ||
			! $settings['allow-users']
		) {
			return;
		}

?>
		<table class="form-table">
			<tr class="classic-editor-user-options">
				<th scope="row"><?php _e( 'Default Editor', 'classic-editor' ); ?></th>
				<td>
				<?php wp_nonce_field( 'allow-user-settings', 'classic-editor-user-settings' ); ?>
				<?php self::settings_1(); ?>
				</td>
			</tr>
		</table>
		<script>jQuery( 'tr.user-rich-editing-wrap' ).before( jQuery( 'tr.classic-editor-user-options' ) );</script>
		<?php
	}

public static function network_settings() {
		$editor = get_network_option( null, 'classic-editor-replace' );
		$is_checked = ( get_network_option( null, 'classic-editor-allow-sites' ) === 'allow' );

?>
		<h2 id="classic-editor-options"><?php _e( 'Editor Settings', 'classic-editor' ); ?></h2>
		<table class="form-table">
			<?php wp_nonce_field( 'allow-site-admin-settings', 'classic-editor-network-settings' ); ?>
			<tr>
				<th scope="row"><?php _e( 'Default editor for all sites', 'classic-editor' ); ?></th>
				<td>
					<p>
						<input type="radio" name="classic-editor-replace" id="classic-editor-classic" value="classic"<?php if ( $editor !== 'block' ) echo ' checked'; ?> />
						<label for="classic-editor-classic"><?php _ex( 'Classic Editor', 'Editor Name', 'classic-editor' ); ?></label>
					</p>
					<p>
						<input type="radio" name="classic-editor-replace" id="classic-editor-block" value="block"<?php if ( $editor === 'block' ) echo ' checked'; ?> />
						<label for="classic-editor-block"><?php _ex( 'Block editor', 'Editor Name', 'classic-editor' ); ?></label>
					</p>
				</td>
			</tr>
			<tr>
				<th scope="row"><?php _e( 'Change settings', 'classic-editor' ); ?></th>
				<td>
					<input type="checkbox" name="classic-editor-allow-sites" id="classic-editor-allow-sites" value="allow"<?php if ( $is_checked ) echo ' checked'; ?>>
					<label for="classic-editor-allow-sites"><?php _e( 'Allow site admins to change settings', 'classic-editor' ); ?></label>
					<p class="description"><?php _e( 'By default the block editor is replaced with the classic editor and users cannot switch editors.', 'classic-editor' ); ?></p>
				</td>
			</tr>
		</table>
		<?php
	}

public static function save_network_settings() {
		if (
			isset( $_POST['classic-editor-network-settings'] ) &&
			current_user_can( 'manage_network_options' ) &&
			wp_verify_nonce( $_POST['classic-editor-network-settings'], 'allow-site-admin-settings' ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		) {
			if ( isset( $_POST['classic-editor-replace'] ) && $_POST['classic-editor-replace'] === 'block' ) {
				update_network_option( null, 'classic-editor-replace', 'block' );
			} else {
				update_network_option( null, 'classic-editor-replace', 'classic' );
			}
			if ( isset( $_POST['classic-editor-allow-sites'] ) && $_POST['classic-editor-allow-sites'] === 'allow' ) {
				update_network_option( null, 'classic-editor-allow-sites', 'allow' );
			} else {
				update_network_option( null, 'classic-editor-allow-sites', 'disallow' );
			}
		}
	}

/**
	 * Add a hidden field in edit-form-advanced.php
	 * to help redirect back to the classic editor on saving.
	 */
	public static function add_redirect_helper() {
		?>
		<input type="hidden" name="classic-editor" value="" />
		<?php
	}

/**
	 * Remember when the classic editor was used to edit a post.
	 */
	public static function remember_classic_editor( $post ) {
		$post_type = get_post_type( $post );

if ( $post_type && post_type_supports( $post_type, 'editor' ) ) {
			self::remember( $post->ID, 'classic-editor' );
		}
	}

/**
	 * Remember when the block editor was used to edit a post.
	 */
	public static function remember_block_editor( $editor_settings, $context ) {
		if ( is_a( $context, 'WP_Post' ) ) {
			$post = $context;
		} elseif ( ! empty( $context->post ) ) {
			$post = $context->post;
		} else {
			return $editor_settings;
		}

$post_type = get_post_type( $post );

if ( $post_type && self::can_edit_post_type( $post_type ) ) {
			self::remember( $post->ID, 'block-editor' );
		}

return $editor_settings;
	}

private static function remember( $post_id, $editor ) {
		if ( get_post_meta( $post_id, 'classic-editor-remember', true ) !== $editor ) {
			update_post_meta( $post_id, 'classic-editor-remember', $editor );
		}
	}

/**
	 * Choose which editor to use for a post.
	 *
	 * Passes through `$which_editor` for block editor (it's sets to `true` but may be changed by another plugin).
	 *
	 * @uses `use_block_editor_for_post` filter.
	 *
	 * @param boolean $use_block_editor True for block editor, false for classic editor.
	 * @param WP_Post $post             The post being edited.
	 * @return boolean True for block editor, false for classic editor.
	 */
	public static function choose_editor( $use_block_editor, $post ) {
		$settings = self::get_settings();
		$editors = self::get_enabled_editors_for_post( $post );

// If no editor is supported, pass through `$use_block_editor`.
		if ( ! $editors['block_editor'] && ! $editors['classic_editor'] ) {
			return $use_block_editor;
		}

// Open the default editor when no $post and for "Add New" links,
		// or the alternate editor when the user is switching editors.
		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		if ( empty( $post->ID ) || $post->post_status === 'auto-draft' ) {
			if (
				( $settings['editor'] === 'classic' && ! isset( $_GET['classic-editor__forget'] ) ) ||  // Add New
				( isset( $_GET['classic-editor'] ) && isset( $_GET['classic-editor__forget'] ) ) // Switch to classic editor when no draft post.
			) {
				$use_block_editor = false;
			}
		} elseif ( self::is_classic( $post->ID ) ) {
			$use_block_editor = false;
		}
		// phpcs:enable WordPress.Security.NonceVerification.Recommended

// Enforce the editor if set by plugins.
		if ( $use_block_editor && ! $editors['block_editor'] ) {
			$use_block_editor = false;
		} elseif ( ! $use_block_editor && ! $editors['classic_editor'] && $editors['block_editor'] ) {
			$use_block_editor = true;
		}

return $use_block_editor;
	}

/**
	 * Keep the `classic-editor` query arg through redirects when saving posts.
	 */
	public static function redirect_location( $location ) {
		if (
			isset( $_REQUEST['classic-editor'] ) || // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			( isset( $_POST['_wp_http_referer'] ) && strpos( $_POST['_wp_http_referer'], '&classic-editor' ) !== false ) // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.NonceVerification.Missing
		) {
			$location = add_query_arg( 'classic-editor', '', $location );
		}

return $location;
	}

/**
	 * Keep the `classic-editor` query arg when looking at revisions.
	 */
	public static function get_edit_post_link( $url ) {
		$settings = self::get_settings();

if ( isset( $_REQUEST['classic-editor'] ) || $settings['editor'] === 'classic' ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			$url = add_query_arg( 'classic-editor', '', $url );
		}

return $url;
	}

public static function add_meta_box( $post_type, $post ) {
		$editors = self::get_enabled_editors_for_post( $post );

if ( ! $editors['block_editor'] || ! $editors['classic_editor'] ) {
			// Editors cannot be switched.
			return;
		}

$id = 'classic-editor-switch-editor';
		$title = __( 'Editor', 'classic-editor' );
		$callback = array( __CLASS__, 'do_meta_box' );
		$args = array(
			'__back_compat_meta_box' => true,
	    );

add_meta_box( $id, $title, $callback, null, 'side', 'default', $args );
	}

public static function do_meta_box( $post ) {
		$edit_url = get_edit_post_link( $post->ID, 'raw' );

// Switching to block editor.
		$edit_url = remove_query_arg( 'classic-editor', $edit_url );
		// Forget the previous value when going to a specific editor.
		$edit_url = add_query_arg( 'classic-editor__forget', '', $edit_url );

?>
		<p style="margin: 1em 0;">
			<a href="<?php echo esc_url( $edit_url ); ?>"><?php _e( 'Switch to block editor', 'classic-editor' ); ?></a>
		</p>
		<?php
	}

public static function enqueue_block_editor_scripts() {
		// get_enabled_editors_for_post() needs a WP_Post or post_ID.
		if ( empty( $GLOBALS['post'] ) ) {
			return;
		}

$editors = self::get_enabled_editors_for_post( $GLOBALS['post'] );

if ( ! $editors['classic_editor'] ) {
			// Editor cannot be switched.
			return;
		}

wp_enqueue_script(
			'classic-editor-plugin',
			plugins_url( 'js/block-editor-plugin.js', __FILE__ ),
			array( 'wp-element', 'wp-components', 'lodash' ),
			'1.4',
			true
		);

wp_localize_script(
			'classic-editor-plugin',
			'classicEditorPluginL10n',
			array( 'linkText' => __( 'Switch to classic editor', 'classic-editor' ) )
		);
	}

/**
	 * Add a link to the settings on the Plugins screen.
	 */
	public static function add_settings_link( $links, $file ) {
		$settings = self::get_settings();

if ( $file === 'classic-editor/classic-editor.php' && ! $settings['hide-settings-ui'] && current_user_can( 'manage_options' ) ) {
			if ( current_filter() === 'plugin_action_links' ) {
				$url = admin_url( 'options-writing.php#classic-editor-options' );
			} else {
				$url = admin_url( '/network/settings.php#classic-editor-options' );
			}

// Prevent warnings in PHP 7.0+ when a plugin uses this filter incorrectly.
			$links = (array) $links;
			$links[] = sprintf( '<a href="%s">%s</a>', $url, __( 'Settings', 'classic-editor' ) );
		}

return $links;
	}

private static function can_edit_post_type( $post_type ) {
		$can_edit = false;

if ( function_exists( 'gutenberg_can_edit_post_type' ) ) {
			$can_edit = gutenberg_can_edit_post_type( $post_type );
		} elseif ( function_exists( 'use_block_editor_for_post_type' ) ) {
			$can_edit = use_block_editor_for_post_type( $post_type );
		}

return $can_edit;
	}

/**
	 * Checks which editors are enabled for the post type.
	 *
	 * @param string $post_type The post type.
	 * @return array Associative array of the editors and whether they are enabled for the post type.
	 */
	private static function get_enabled_editors_for_post_type( $post_type ) {
		if ( isset( self::$supported_post_types[ $post_type ] ) ) {
			return self::$supported_post_types[ $post_type ];
		}

$classic_editor = post_type_supports( $post_type, 'editor' );
		$block_editor = self::can_edit_post_type( $post_type );

$editors = array(
			'classic_editor' => $classic_editor,
			'block_editor'   => $block_editor,
		);

/**
		 * Filters the editors that are enabled for the post type.
		 *
		 * @param array $editors    Associative array of the editors and whether they are enabled for the post type.
		 * @param string $post_type The post type.
		 */
		$editors = apply_filters( 'classic_editor_enabled_editors_for_post_type', $editors, $post_type );
		self::$supported_post_types[ $post_type ] = $editors;

return $editors;
	}

/**
	 * Checks which editors are enabled for the post.
	 *
	 * @param WP_Post $post  The post object.
	 * @return array Associative array of the editors and whether they are enabled for the post.
	 */
	private static function get_enabled_editors_for_post( $post ) {
		$post_type = get_post_type( $post );

if ( ! $post_type ) {
			return array(
				'classic_editor' => false,
				'block_editor'   => false,
			);
		}

$editors = self::get_enabled_editors_for_post_type( $post_type );

/**
		 * Filters the editors that are enabled for the post.
		 *
		 * @param array $editors Associative array of the editors and whether they are enabled for the post.
		 * @param WP_Post $post  The post object.
		 */
		return apply_filters( 'classic_editor_enabled_editors_for_post', $editors, $post );
	}

/**
	 * Adds links to the post/page screens to edit any post or page in
	 * the classic editor or block editor.
	 *
	 * @param  array   $actions Post actions.
	 * @param  WP_Post $post    Edited post.
	 * @return array Updated post actions.
	 */
	public static function add_edit_links( $actions, $post ) {
		// This is in Gutenberg, don't duplicate it.
		if ( array_key_exists( 'classic', $actions ) ) {
			unset( $actions['classic'] );
		}

if ( ! array_key_exists( 'edit', $actions ) ) {
			return $actions;
		}

$edit_url = get_edit_post_link( $post->ID, 'raw' );

if ( ! $edit_url ) {
			return $actions;
		}

$editors = self::get_enabled_editors_for_post( $post );

// Do not show the links if only one editor is available.
		if ( ! $editors['classic_editor'] || ! $editors['block_editor'] ) {
			return $actions;
		}

// Forget the previous value when going to a specific editor.
		$edit_url = add_query_arg( 'classic-editor__forget', '', $edit_url );

// Build the edit actions. See also: WP_Posts_List_Table::handle_row_actions().
		$title = _draft_or_post_title( $post->ID );

// Link to the block editor.
		$url = remove_query_arg( 'classic-editor', $edit_url );
		$text = _x( 'Edit (block editor)', 'Editor Name', 'classic-editor' );
		/* translators: %s: post title */
		$label = sprintf( __( 'Edit &#8220;%s&#8221; in the block editor', 'classic-editor' ), $title );
		$edit_block = sprintf( '<a href="%s" aria-label="%s">%s</a>', esc_url( $url ), esc_attr( $label ), $text );

// Link to the classic editor.
		$url = add_query_arg( 'classic-editor', '', $edit_url );
		$text = _x( 'Edit (classic editor)', 'Editor Name', 'classic-editor' );
		/* translators: %s: post title */
		$label = sprintf( __( 'Edit &#8220;%s&#8221; in the classic editor', 'classic-editor' ), $title );
		$edit_classic = sprintf( '<a href="%s" aria-label="%s">%s</a>', esc_url( $url ), esc_attr( $label ), $text );

$edit_actions = array(
			'classic-editor-block' => $edit_block,
			'classic-editor-classic' => $edit_classic,
		);

// Insert the new Edit actions instead of the Edit action.
		$edit_offset = array_search( 'edit', array_keys( $actions ), true );
		array_splice( $actions, $edit_offset, 1, $edit_actions );

return $actions;
	}

/**
	 * Show the editor that will be used in a "post state" in the Posts list table.
	 */
	public static function add_post_state( $post_states, $post ) {
		if ( get_post_status( $post ) === 'trash' ) {
			return $post_states;
		}

$editors = self::get_enabled_editors_for_post( $post );

if ( ! $editors['classic_editor'] && ! $editors['block_editor'] ) {
			return $post_states;
		} elseif ( $editors['classic_editor'] && ! $editors['block_editor'] ) {
			// Forced to classic editor.
			$state = '<span class="classic-editor-forced-state">' . _x( 'classic editor', 'Editor Name', 'classic-editor' ) . '</span>';
		} elseif ( ! $editors['classic_editor'] && $editors['block_editor'] ) {
			// Forced to block editor.
			$state = '<span class="classic-editor-forced-state">' . _x( 'block editor', 'Editor Name', 'classic-editor' ) . '</span>';
		} else {
			$last_editor = get_post_meta( $post->ID, 'classic-editor-remember', true );

if ( $last_editor ) {
				$is_classic = ( $last_editor === 'classic-editor' );
			} elseif ( ! empty( $post->post_content ) ) {
				$is_classic = ! self::has_blocks( $post->post_content );
			} else {
				$settings = self::get_settings();
				$is_classic = ( $settings['editor'] === 'classic' );
			}

$state = $is_classic ? _x( 'Classic editor', 'Editor Name', 'classic-editor' ) : _x( 'Block editor', 'Editor Name', 'classic-editor' );
		}

// Fix PHP 7+ warnings if another plugin returns unexpected type.
		$post_states = (array) $post_states;
		$post_states['classic-editor-plugin'] = $state;

return $post_states;
	}

public static function add_edit_php_inline_style() {
		?>
		<style>
		.classic-editor-forced-state {
			font-style: italic;
			font-weight: 400;
			color: #72777c;
			font-size: small;
		}
		</style>
		<?php
	}

public static function on_admin_init() {
		global $pagenow;

if ( $pagenow !== 'post.php' ) {
			return;
		}

$settings = self::get_settings();
		$post_id = self::get_edited_post_id();

if ( $post_id && ( $settings['editor'] === 'classic' || self::is_classic( $post_id ) ) ) {
			// Move the Privacy Policy help notice back under the title field.
			remove_action( 'admin_notices', array( 'WP_Privacy_Policy_Content', 'notice' ) );
			add_action( 'edit_form_after_title', array( 'WP_Privacy_Policy_Content', 'notice' ) );
		}
	}

// Need to support WP < 5.0
	private static function has_blocks( $post = null ) {
		if ( ! is_string( $post ) ) {
			$wp_post = get_post( $post );

if ( $wp_post instanceof WP_Post ) {
				$post = $wp_post->post_content;
			}
		}

return false !== strpos( (string) $post, '<!-- wp:' );
	}

/**
	 * Set defaults on activation.
	 */
	public static function activate() {
		register_uninstall_hook( __FILE__, array( __CLASS__, 'uninstall' ) );

if ( is_multisite() ) {
			add_network_option( null, 'classic-editor-replace', 'classic' );
			add_network_option( null, 'classic-editor-allow-sites', 'disallow' );
		}

add_option( 'classic-editor-replace', 'classic' );
		add_option( 'classic-editor-allow-users', 'disallow' );
	}

/**
	 * Delete the options on uninstall.
	 */
	public static function uninstall() {
		if ( is_multisite() ) {
			delete_network_option( null, 'classic-editor-replace' );
			delete_network_option( null, 'classic-editor-allow-sites' );
		}

delete_option( 'classic-editor-replace' );
		delete_option( 'classic-editor-allow-users' );
	}
}

add_action( 'plugins_loaded', array( 'Classic_Editor', 'init_actions' ) );

endif;

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	site43376755/	drwx---r-x	2023-07-25 05:23:31
..	dir	-	site43376755/	drwx---r-x	2024-07-17 01:52:26
js	dir	-	site43376755/	drwx---r-x	2023-07-25 05:23:31
LICENSE.md	text/plain	18.66 KB	site43376755/	-rw----r--	2023-07-25 05:23:31
classic-editor.php	text/x-php	35.17 KB	site43376755/	-rw----r--	2023-07-25 05:23:31
readme.txt	text/plain	7.48 KB	site43376755/	-rw----r--	2023-07-25 05:23:31