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   1  <?php
   2  /**
   3   * The block editor page.
   4   *
   5   * @since 5.0.0
   6   *
   7   * @package WordPress
   8   * @subpackage Administration
   9   */
  10  
  11  // Don't load directly.
  12  if ( ! defined( 'ABSPATH' ) ) {
  13      die( '-1' );
  14  }
  15  
  16  /**
  17   * @global string       $post_type        Global post type.
  18   * @global WP_Post_Type $post_type_object Global post type object.
  19   * @global WP_Post      $post             Global post object.
  20   * @global string       $title            The title of the current screen.
  21   * @global array        $wp_meta_boxes    Global meta box state.
  22   */
  23  global $post_type, $post_type_object, $post, $title, $wp_meta_boxes;
  24  
  25  $block_editor_context = new WP_Block_Editor_Context( array( 'post' => $post ) );
  26  
  27  // Flag that we're loading the block editor.
  28  $current_screen = get_current_screen();
  29  $current_screen->is_block_editor( true );
  30  
  31  // Default to is-fullscreen-mode to avoid jumps in the UI.
  32  add_filter(
  33      'admin_body_class',
  34      static function ( $classes ) {
  35          return "$classes is-fullscreen-mode";
  36      }
  37  );
  38  
  39  /*
  40   * Emoji replacement is disabled for now, until it plays nicely with React.
  41   */
  42  remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
  43  
  44  /*
  45   * Block editor implements its own Options menu for toggling Document Panels.
  46   */
  47  add_filter( 'screen_options_show_screen', '__return_false' );
  48  
  49  wp_enqueue_script( 'heartbeat' );
  50  wp_enqueue_script( 'wp-edit-post' );
  51  
  52  $rest_path = rest_get_route_for_post( $post );
  53  
  54  $active_theme                   = get_stylesheet();
  55  $global_styles_endpoint_context = current_user_can( 'edit_theme_options' ) ? 'edit' : 'view';
  56  $template_lookup_slug           = 'page' === $post->post_type ? 'page' : 'single-' . $post->post_type;
  57  if ( ! empty( $post->post_name ) ) {
  58      $template_lookup_slug .= '-' . $post->post_name;
  59  }
  60  // Preload common data.
  61  $preload_paths = array(
  62      '/wp/v2/types?context=view',
  63      '/wp/v2/taxonomies?context=view',
  64      add_query_arg( 'context', 'edit', $rest_path ),
  65      sprintf( '/wp/v2/types/%s?context=edit', $post_type ),
  66      '/wp/v2/users/me',
  67      array( rest_get_route_for_post_type_items( 'attachment' ), 'OPTIONS' ),
  68      array( rest_get_route_for_post_type_items( 'page' ), 'OPTIONS' ),
  69      array( rest_get_route_for_post_type_items( 'wp_block' ), 'OPTIONS' ),
  70      array( rest_get_route_for_post_type_items( 'wp_template' ), 'OPTIONS' ),
  71      sprintf( '%s/autosaves?context=edit', $rest_path ),
  72      '/wp/v2/settings',
  73      array( '/wp/v2/settings', 'OPTIONS' ),
  74      '/wp/v2/global-styles/themes/' . $active_theme . '?context=view',
  75      '/wp/v2/global-styles/themes/' . $active_theme . '/variations?context=view',
  76      '/wp/v2/themes?context=edit&status=active',
  77      array( '/wp/v2/global-styles/' . WP_Theme_JSON_Resolver::get_user_global_styles_post_id(), 'OPTIONS' ),
  78      /*
  79       * Preload the global styles path with the correct context based on user caps.
  80       * NOTE: There is an equivalent conditional check in the client-side code to fetch
  81       * the global styles entity using the appropriate context value.
  82       * See the call to `canUser()`, under `useGlobalStylesUserConfig()` in `packages/edit-site/src/components/use-global-styles-user-config/index.js`.
  83       * Please ensure that the equivalent check is kept in sync with this preload path.
  84       */
  85      '/wp/v2/global-styles/' . WP_Theme_JSON_Resolver::get_user_global_styles_post_id() . '?context=' . $global_styles_endpoint_context,
  86      // Used by getBlockPatternCategories in useBlockEditorSettings.
  87      '/wp/v2/block-patterns/categories',
  88      // @see packages/core-data/src/entities.js
  89      '/?_fields=' . implode(
  90          ',',
  91          array(
  92              'description',
  93              'gmt_offset',
  94              'home',
  95              'name',
  96              'site_icon',
  97              'site_icon_url',
  98              'site_logo',
  99              'timezone_string',
 100              'url',
 101              'page_for_posts',
 102              'page_on_front',
 103              'show_on_front',
 104          )
 105      ),
 106      $paths[] = add_query_arg(
 107          'slug',
 108          // @see https://github.com/WordPress/gutenberg/blob/e093fefd041eb6cc4a4e7f67b92ab54fd75c8858/packages/core-data/src/private-selectors.ts#L244-L254
 109          $template_lookup_slug,
 110          '/wp/v2/templates/lookup'
 111      ),
 112  );
 113  
 114  block_editor_rest_api_preload( $preload_paths, $block_editor_context );
 115  
 116  wp_add_inline_script(
 117      'wp-blocks',
 118      sprintf( 'wp.blocks.setCategories( %s );', wp_json_encode( get_block_categories( $post ) ) ),
 119      'after'
 120  );
 121  
 122  /*
 123   * Assign initial edits, if applicable. These are not initially assigned to the persisted post,
 124   * but should be included in its save payload.
 125   */
 126  $initial_edits = array();
 127  $is_new_post   = false;
 128  if ( 'auto-draft' === $post->post_status ) {
 129      $is_new_post = true;
 130      // Override "(Auto Draft)" new post default title with empty string, or filtered value.
 131      if ( post_type_supports( $post->post_type, 'title' ) ) {
 132          $initial_edits['title'] = $post->post_title;
 133      }
 134  
 135      if ( post_type_supports( $post->post_type, 'editor' ) ) {
 136          $initial_edits['content'] = $post->post_content;
 137      }
 138  
 139      if ( post_type_supports( $post->post_type, 'excerpt' ) ) {
 140          $initial_edits['excerpt'] = $post->post_excerpt;
 141      }
 142  }
 143  
 144  // Preload server-registered block schemas.
 145  wp_add_inline_script(
 146      'wp-blocks',
 147      'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . wp_json_encode( get_block_editor_server_block_settings() ) . ');'
 148  );
 149  
 150  // Preload server-registered block bindings sources.
 151  $registered_sources = get_all_registered_block_bindings_sources();
 152  if ( ! empty( $registered_sources ) ) {
 153      $filtered_sources = array();
 154      foreach ( $registered_sources as $source ) {
 155          $filtered_sources[] = array(
 156              'name'        => $source->name,
 157              'label'       => $source->label,
 158              'usesContext' => $source->uses_context,
 159          );
 160      }
 161      $script = sprintf( 'for ( const source of %s ) { wp.blocks.registerBlockBindingsSource( source ); }', wp_json_encode( $filtered_sources ) );
 162      wp_add_inline_script(
 163          'wp-blocks',
 164          $script
 165      );
 166  }
 167  
 168  // Get admin url for handling meta boxes.
 169  $meta_box_url = admin_url( 'post.php' );
 170  $meta_box_url = add_query_arg(
 171      array(
 172          'post'                  => $post->ID,
 173          'action'                => 'edit',
 174          'meta-box-loader'       => true,
 175          'meta-box-loader-nonce' => wp_create_nonce( 'meta-box-loader' ),
 176      ),
 177      $meta_box_url
 178  );
 179  wp_add_inline_script(
 180      'wp-editor',
 181      sprintf( 'var _wpMetaBoxUrl = %s;', wp_json_encode( $meta_box_url ) ),
 182      'before'
 183  );
 184  
 185  // Set Heartbeat interval to 10 seconds, used to refresh post locks.
 186  wp_add_inline_script(
 187      'heartbeat',
 188      'jQuery( function() {
 189          wp.heartbeat.interval( 10 );
 190      } );',
 191      'after'
 192  );
 193  
 194  /*
 195   * Get all available templates for the post/page attributes meta-box.
 196   * The "Default template" array element should only be added if the array is
 197   * not empty so we do not trigger the template select element without any options
 198   * besides the default value.
 199   */
 200  $available_templates = wp_get_theme()->get_page_templates( get_post( $post->ID ) );
 201  $available_templates = ! empty( $available_templates ) ? array_replace(
 202      array(
 203          /** This filter is documented in wp-admin/includes/meta-boxes.php */
 204          '' => apply_filters( 'default_page_template_title', __( 'Default template' ), 'rest-api' ),
 205      ),
 206      $available_templates
 207  ) : $available_templates;
 208  
 209  // Lock settings.
 210  $user_id = wp_check_post_lock( $post->ID );
 211  if ( $user_id ) {
 212      $locked = false;
 213  
 214      /** This filter is documented in wp-admin/includes/post.php */
 215      if ( apply_filters( 'show_post_locked_dialog', true, $post, $user_id ) ) {
 216          $locked = true;
 217      }
 218  
 219      $user_details = null;
 220      if ( $locked ) {
 221          $user         = get_userdata( $user_id );
 222          $user_details = array(
 223              'name' => $user->display_name,
 224          );
 225  
 226          if ( get_option( 'show_avatars' ) ) {
 227              $user_details['avatar'] = get_avatar_url( $user_id, array( 'size' => 128 ) );
 228          }
 229      }
 230  
 231      $lock_details = array(
 232          'isLocked' => $locked,
 233          'user'     => $user_details,
 234      );
 235  } else {
 236      // Lock the post.
 237      $active_post_lock = wp_set_post_lock( $post->ID );
 238      if ( $active_post_lock ) {
 239          $active_post_lock = esc_attr( implode( ':', $active_post_lock ) );
 240      }
 241  
 242      $lock_details = array(
 243          'isLocked'       => false,
 244          'activePostLock' => $active_post_lock,
 245      );
 246  }
 247  
 248  /**
 249   * Filters the body placeholder text.
 250   *
 251   * @since 5.0.0
 252   * @since 5.8.0 Changed the default placeholder text.
 253   *
 254   * @param string  $text Placeholder text. Default 'Type / to choose a block'.
 255   * @param WP_Post $post Post object.
 256   */
 257  $body_placeholder = apply_filters( 'write_your_story', __( 'Type / to choose a block' ), $post );
 258  
 259  $editor_settings = array(
 260      'availableTemplates'   => $available_templates,
 261      'disablePostFormats'   => ! current_theme_supports( 'post-formats' ),
 262      /** This filter is documented in wp-admin/edit-form-advanced.php */
 263      'titlePlaceholder'     => apply_filters( 'enter_title_here', __( 'Add title' ), $post ),
 264      'bodyPlaceholder'      => $body_placeholder,
 265      'autosaveInterval'     => AUTOSAVE_INTERVAL,
 266      'richEditingEnabled'   => user_can_richedit(),
 267      'postLock'             => $lock_details,
 268      'postLockUtils'        => array(
 269          'nonce'       => wp_create_nonce( 'lock-post_' . $post->ID ),
 270          'unlockNonce' => wp_create_nonce( 'update-post_' . $post->ID ),
 271          'ajaxUrl'     => admin_url( 'admin-ajax.php' ),
 272      ),
 273      'supportsLayout'       => wp_theme_has_theme_json(),
 274      'supportsTemplateMode' => current_theme_supports( 'block-templates' ),
 275  
 276      // Whether or not to load the 'postcustom' meta box is stored as a user meta
 277      // field so that we're not always loading its assets.
 278      'enableCustomFields'   => (bool) get_user_meta( get_current_user_id(), 'enable_custom_fields', true ),
 279  );
 280  
 281  // Add additional back-compat patterns registered by `current_screen` et al.
 282  $editor_settings['__experimentalAdditionalBlockPatterns']          = WP_Block_Patterns_Registry::get_instance()->get_all_registered( true );
 283  $editor_settings['__experimentalAdditionalBlockPatternCategories'] = WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered( true );
 284  
 285  $autosave = wp_get_post_autosave( $post->ID );
 286  if ( $autosave ) {
 287      if ( mysql2date( 'U', $autosave->post_modified_gmt, false ) > mysql2date( 'U', $post->post_modified_gmt, false ) ) {
 288          $editor_settings['autosave'] = array(
 289              'editLink' => get_edit_post_link( $autosave->ID ),
 290          );
 291      } else {
 292          wp_delete_post_revision( $autosave->ID );
 293      }
 294  }
 295  
 296  if ( ! empty( $post_type_object->template ) ) {
 297      $editor_settings['template']     = $post_type_object->template;
 298      $editor_settings['templateLock'] = ! empty( $post_type_object->template_lock ) ? $post_type_object->template_lock : false;
 299  }
 300  
 301  // If there's no template set on a new post, use the post format, instead.
 302  if ( $is_new_post && ! isset( $editor_settings['template'] ) && 'post' === $post->post_type ) {
 303      $post_format = get_post_format( $post );
 304      if ( in_array( $post_format, array( 'audio', 'gallery', 'image', 'quote', 'video' ), true ) ) {
 305          $editor_settings['template'] = array( array( "core/$post_format" ) );
 306      }
 307  }
 308  
 309  if ( wp_is_block_theme() && $editor_settings['supportsTemplateMode'] ) {
 310      $editor_settings['defaultTemplatePartAreas'] = get_allowed_block_template_part_areas();
 311  }
 312  
 313  /**
 314   * Scripts
 315   */
 316  wp_enqueue_media(
 317      array(
 318          'post' => $post->ID,
 319      )
 320  );
 321  wp_tinymce_inline_scripts();
 322  wp_enqueue_editor();
 323  
 324  /**
 325   * Styles
 326   */
 327  wp_enqueue_style( 'wp-edit-post' );
 328  
 329  /**
 330   * Fires after block assets have been enqueued for the editing interface.
 331   *
 332   * Call `add_action` on any hook before 'admin_enqueue_scripts'.
 333   *
 334   * In the function call you supply, simply use `wp_enqueue_script` and
 335   * `wp_enqueue_style` to add your functionality to the block editor.
 336   *
 337   * @since 5.0.0
 338   */
 339  do_action( 'enqueue_block_editor_assets' );
 340  
 341  // In order to duplicate classic meta box behavior, we need to run the classic meta box actions.
 342  require_once  ABSPATH . 'wp-admin/includes/meta-boxes.php';
 343  register_and_do_post_meta_boxes( $post );
 344  
 345  // Check if the Custom Fields meta box has been removed at some point.
 346  $core_meta_boxes = $wp_meta_boxes[ $current_screen->id ]['normal']['core'];
 347  if ( ! isset( $core_meta_boxes['postcustom'] ) || ! $core_meta_boxes['postcustom'] ) {
 348      unset( $editor_settings['enableCustomFields'] );
 349  }
 350  
 351  $editor_settings = get_block_editor_settings( $editor_settings, $block_editor_context );
 352  
 353  $init_script = <<<JS
 354  ( function() {
 355      window._wpLoadBlockEditor = new Promise( function( resolve ) {
 356          wp.domReady( function() {
 357              resolve( wp.editPost.initializeEditor( 'editor', "%s", %d, %s, %s ) );
 358          } );
 359      } );
 360  } )();
 361  JS;
 362  
 363  $script = sprintf(
 364      $init_script,
 365      $post->post_type,
 366      $post->ID,
 367      wp_json_encode( $editor_settings ),
 368      wp_json_encode( $initial_edits )
 369  );
 370  wp_add_inline_script( 'wp-edit-post', $script );
 371  
 372  if ( (int) get_option( 'page_for_posts' ) === $post->ID ) {
 373      add_action( 'admin_enqueue_scripts', '_wp_block_editor_posts_page_notice' );
 374  }
 375  
 376  require_once  ABSPATH . 'wp-admin/admin-header.php';
 377  ?>
 378  
 379  <div class="block-editor">
 380      <h1 class="screen-reader-text hide-if-no-js"><?php echo esc_html( $title ); ?></h1>
 381      <div id="editor" class="block-editor__container hide-if-no-js"></div>
 382      <div id="metaboxes" class="hidden">
 383          <?php the_block_editor_meta_boxes(); ?>
 384      </div>
 385  
 386      <?php // JavaScript is disabled. ?>
 387      <div class="wrap hide-if-js block-editor-no-js">
 388          <h1 class="wp-heading-inline"><?php echo esc_html( $title ); ?></h1>
 389          <?php
 390          if ( file_exists( WP_PLUGIN_DIR . '/classic-editor/classic-editor.php' ) ) {
 391              // If Classic Editor is already installed, provide a link to activate the plugin.
 392              $installed           = true;
 393              $plugin_activate_url = wp_nonce_url( 'plugins.php?action=activate&amp;plugin=classic-editor/classic-editor.php', 'activate-plugin_classic-editor/classic-editor.php' );
 394              $message             = sprintf(
 395                  /* translators: %s: Link to activate the Classic Editor plugin. */
 396                  __( 'The block editor requires JavaScript. Please enable JavaScript in your browser settings, or activate the <a href="%s">Classic Editor plugin</a>.' ),
 397                  esc_url( $plugin_activate_url )
 398              );
 399          } else {
 400              // If Classic Editor is not installed, provide a link to install it.
 401              $installed          = false;
 402              $plugin_install_url = wp_nonce_url( self_admin_url( 'update.php?action=install-plugin&plugin=classic-editor' ), 'install-plugin_classic-editor' );
 403              $message            = sprintf(
 404                  /* translators: %s: Link to install the Classic Editor plugin. */
 405                  __( 'The block editor requires JavaScript. Please enable JavaScript in your browser settings, or install the <a href="%s">Classic Editor plugin</a>.' ),
 406                  esc_url( $plugin_install_url )
 407              );
 408          }
 409  
 410          /**
 411           * Filters the message displayed in the block editor interface when JavaScript is
 412           * not enabled in the browser.
 413           *
 414           * @since 5.0.3
 415           * @since 6.4.0 Added `$installed` parameter.
 416           *
 417           * @param string  $message   The message being displayed.
 418           * @param WP_Post $post      The post being edited.
 419           * @param bool    $installed Whether the classic editor is installed.
 420           */
 421          $message = apply_filters( 'block_editor_no_javascript_message', $message, $post, $installed );
 422          wp_admin_notice(
 423              $message,
 424              array(
 425                  'type' => 'error',
 426              )
 427          );
 428          ?>
 429      </div>
 430  </div>