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   1  <?php
   2  /**
   3   * WordPress Administration Screen API.
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  /**
  10   * Get the column headers for a screen
  11   *
  12   * @since 2.7.0
  13   *
  14   * @param string|WP_Screen $screen The screen you want the headers for
  15   * @return string[] The column header labels keyed by column ID.
  16   */
  17  function get_column_headers( $screen ) {
  18      static $column_headers = array();
  19  
  20      if ( is_string( $screen ) ) {
  21          $screen = convert_to_screen( $screen );
  22      }
  23  
  24      if ( ! isset( $column_headers[ $screen->id ] ) ) {
  25          /**
  26           * Filters the column headers for a list table on a specific screen.
  27           *
  28           * The dynamic portion of the hook name, `$screen->id`, refers to the
  29           * ID of a specific screen. For example, the screen ID for the Posts
  30           * list table is edit-post, so the filter for that screen would be
  31           * manage_edit-post_columns.
  32           *
  33           * @since 3.0.0
  34           *
  35           * @param string[] $columns The column header labels keyed by column ID.
  36           */
  37          $column_headers[ $screen->id ] = apply_filters( "manage_{$screen->id}_columns", array() );
  38      }
  39  
  40      return $column_headers[ $screen->id ];
  41  }
  42  
  43  /**
  44   * Get a list of hidden columns.
  45   *
  46   * @since 2.7.0
  47   *
  48   * @param string|WP_Screen $screen The screen you want the hidden columns for
  49   * @return string[] Array of IDs of hidden columns.
  50   */
  51  function get_hidden_columns( $screen ) {
  52      if ( is_string( $screen ) ) {
  53          $screen = convert_to_screen( $screen );
  54      }
  55  
  56      $hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );
  57  
  58      $use_defaults = ! is_array( $hidden );
  59  
  60      if ( $use_defaults ) {
  61          $hidden = array();
  62  
  63          /**
  64           * Filters the default list of hidden columns.
  65           *
  66           * @since 4.4.0
  67           *
  68           * @param string[]  $hidden Array of IDs of columns hidden by default.
  69           * @param WP_Screen $screen WP_Screen object of the current screen.
  70           */
  71          $hidden = apply_filters( 'default_hidden_columns', $hidden, $screen );
  72      }
  73  
  74      /**
  75       * Filters the list of hidden columns.
  76       *
  77       * @since 4.4.0
  78       * @since 4.4.1 Added the `use_defaults` parameter.
  79       *
  80       * @param string[]  $hidden       Array of IDs of hidden columns.
  81       * @param WP_Screen $screen       WP_Screen object of the current screen.
  82       * @param bool      $use_defaults Whether to show the default columns.
  83       */
  84      return apply_filters( 'hidden_columns', $hidden, $screen, $use_defaults );
  85  }
  86  
  87  /**
  88   * Prints the meta box preferences for screen meta.
  89   *
  90   * @since 2.7.0
  91   *
  92   * @global array $wp_meta_boxes Global meta box state.
  93   *
  94   * @param WP_Screen $screen
  95   */
  96  function meta_box_prefs( $screen ) {
  97      global $wp_meta_boxes;
  98  
  99      if ( is_string( $screen ) ) {
 100          $screen = convert_to_screen( $screen );
 101      }
 102  
 103      if ( empty( $wp_meta_boxes[ $screen->id ] ) ) {
 104          return;
 105      }
 106  
 107      $hidden = get_hidden_meta_boxes( $screen );
 108  
 109      foreach ( array_keys( $wp_meta_boxes[ $screen->id ] ) as $context ) {
 110          foreach ( array( 'high', 'core', 'default', 'low' ) as $priority ) {
 111              if ( ! isset( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] ) ) {
 112                  continue;
 113              }
 114  
 115              foreach ( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] as $box ) {
 116                  if ( false === $box || ! $box['title'] ) {
 117                      continue;
 118                  }
 119  
 120                  // Submit box cannot be hidden.
 121                  if ( 'submitdiv' === $box['id'] || 'linksubmitdiv' === $box['id'] ) {
 122                      continue;
 123                  }
 124  
 125                  $widget_title = $box['title'];
 126  
 127                  if ( is_array( $box['args'] ) && isset( $box['args']['__widget_basename'] ) ) {
 128                      $widget_title = $box['args']['__widget_basename'];
 129                  }
 130  
 131                  $is_hidden = in_array( $box['id'], $hidden, true );
 132  
 133                  printf(
 134                      '<label for="%1$s-hide"><input class="hide-postbox-tog" name="%1$s-hide" type="checkbox" id="%1$s-hide" value="%1$s" %2$s />%3$s</label>',
 135                      esc_attr( $box['id'] ),
 136                      checked( $is_hidden, false, false ),
 137                      $widget_title
 138                  );
 139              }
 140          }
 141      }
 142  }
 143  
 144  /**
 145   * Gets an array of IDs of hidden meta boxes.
 146   *
 147   * @since 2.7.0
 148   *
 149   * @param string|WP_Screen $screen Screen identifier
 150   * @return string[] IDs of hidden meta boxes.
 151   */
 152  function get_hidden_meta_boxes( $screen ) {
 153      if ( is_string( $screen ) ) {
 154          $screen = convert_to_screen( $screen );
 155      }
 156  
 157      $hidden = get_user_option( "metaboxhidden_{$screen->id}" );
 158  
 159      $use_defaults = ! is_array( $hidden );
 160  
 161      // Hide slug boxes by default.
 162      if ( $use_defaults ) {
 163          $hidden = array();
 164  
 165          if ( 'post' === $screen->base ) {
 166              if ( in_array( $screen->post_type, array( 'post', 'page', 'attachment' ), true ) ) {
 167                  $hidden = array( 'slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv' );
 168              } else {
 169                  $hidden = array( 'slugdiv' );
 170              }
 171          }
 172  
 173          /**
 174           * Filters the default list of hidden meta boxes.
 175           *
 176           * @since 3.1.0
 177           *
 178           * @param string[]  $hidden An array of IDs of meta boxes hidden by default.
 179           * @param WP_Screen $screen WP_Screen object of the current screen.
 180           */
 181          $hidden = apply_filters( 'default_hidden_meta_boxes', $hidden, $screen );
 182      }
 183  
 184      /**
 185       * Filters the list of hidden meta boxes.
 186       *
 187       * @since 3.3.0
 188       *
 189       * @param string[]  $hidden       An array of IDs of hidden meta boxes.
 190       * @param WP_Screen $screen       WP_Screen object of the current screen.
 191       * @param bool      $use_defaults Whether to show the default meta boxes.
 192       *                                Default true.
 193       */
 194      return apply_filters( 'hidden_meta_boxes', $hidden, $screen, $use_defaults );
 195  }
 196  
 197  /**
 198   * Register and configure an admin screen option
 199   *
 200   * @since 3.1.0
 201   *
 202   * @param string $option An option name.
 203   * @param mixed  $args   Option-dependent arguments.
 204   */
 205  function add_screen_option( $option, $args = array() ) {
 206      $current_screen = get_current_screen();
 207  
 208      if ( ! $current_screen ) {
 209          return;
 210      }
 211  
 212      $current_screen->add_option( $option, $args );
 213  }
 214  
 215  /**
 216   * Get the current screen object
 217   *
 218   * @since 3.1.0
 219   *
 220   * @global WP_Screen $current_screen WordPress current screen object.
 221   *
 222   * @return WP_Screen|null Current screen object or null when screen not defined.
 223   */
 224  function get_current_screen() {
 225      global $current_screen;
 226  
 227      if ( ! isset( $current_screen ) ) {
 228          return null;
 229      }
 230  
 231      return $current_screen;
 232  }
 233  
 234  /**
 235   * Set the current screen object
 236   *
 237   * @since 3.0.0
 238   *
 239   * @param string|WP_Screen $hook_name Optional. The hook name (also known as the hook suffix) used to determine the screen,
 240   *                                    or an existing screen object.
 241   */
 242  function set_current_screen( $hook_name = '' ) {
 243      WP_Screen::get( $hook_name )->set_current_screen();
 244  }