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   1  <?php
   2  /**
   3   * WordPress Customize Panel classes
   4   *
   5   * @package WordPress
   6   * @subpackage Customize
   7   * @since 4.0.0
   8   */
   9  
  10  /**
  11   * Customize Panel class.
  12   *
  13   * A UI container for sections, managed by the WP_Customize_Manager.
  14   *
  15   * @since 4.0.0
  16   *
  17   * @see WP_Customize_Manager
  18   */
  19  class WP_Customize_Panel {
  20  
  21      /**
  22       * Incremented with each new class instantiation, then stored in $instance_number.
  23       *
  24       * Used when sorting two instances whose priorities are equal.
  25       *
  26       * @since 4.1.0
  27       * @var int
  28       */
  29      protected static $instance_count = 0;
  30  
  31      /**
  32       * Order in which this instance was created in relation to other instances.
  33       *
  34       * @since 4.1.0
  35       * @var int
  36       */
  37      public $instance_number;
  38  
  39      /**
  40       * WP_Customize_Manager instance.
  41       *
  42       * @since 4.0.0
  43       * @var WP_Customize_Manager
  44       */
  45      public $manager;
  46  
  47      /**
  48       * Unique identifier.
  49       *
  50       * @since 4.0.0
  51       * @var string
  52       */
  53      public $id;
  54  
  55      /**
  56       * Priority of the panel, defining the display order of panels and sections.
  57       *
  58       * @since 4.0.0
  59       * @var int
  60       */
  61      public $priority = 160;
  62  
  63      /**
  64       * Capability required for the panel.
  65       *
  66       * @since 4.0.0
  67       * @var string
  68       */
  69      public $capability = 'edit_theme_options';
  70  
  71      /**
  72       * Theme features required to support the panel.
  73       *
  74       * @since 4.0.0
  75       * @var string|string[]
  76       */
  77      public $theme_supports = '';
  78  
  79      /**
  80       * Title of the panel to show in UI.
  81       *
  82       * @since 4.0.0
  83       * @var string
  84       */
  85      public $title = '';
  86  
  87      /**
  88       * Description to show in the UI.
  89       *
  90       * @since 4.0.0
  91       * @var string
  92       */
  93      public $description = '';
  94  
  95      /**
  96       * Auto-expand a section in a panel when the panel is expanded when the panel only has the one section.
  97       *
  98       * @since 4.7.4
  99       * @var bool
 100       */
 101      public $auto_expand_sole_section = false;
 102  
 103      /**
 104       * Customizer sections for this panel.
 105       *
 106       * @since 4.0.0
 107       * @var array
 108       */
 109      public $sections;
 110  
 111      /**
 112       * Type of this panel.
 113       *
 114       * @since 4.1.0
 115       * @var string
 116       */
 117      public $type = 'default';
 118  
 119      /**
 120       * Active callback.
 121       *
 122       * @since 4.1.0
 123       *
 124       * @see WP_Customize_Section::active()
 125       *
 126       * @var callable Callback is called with one argument, the instance of
 127       *               WP_Customize_Section, and returns bool to indicate whether
 128       *               the section is active (such as it relates to the URL currently
 129       *               being previewed).
 130       */
 131      public $active_callback = '';
 132  
 133      /**
 134       * Constructor.
 135       *
 136       * Any supplied $args override class property defaults.
 137       *
 138       * @since 4.0.0
 139       *
 140       * @param WP_Customize_Manager $manager Customizer bootstrap instance.
 141       * @param string               $id      A specific ID for the panel.
 142       * @param array                $args    {
 143       *     Optional. Array of properties for the new Panel object. Default empty array.
 144       *
 145       *     @type int             $priority        Priority of the panel, defining the display order
 146       *                                            of panels and sections. Default 160.
 147       *     @type string          $capability      Capability required for the panel.
 148       *                                            Default `edit_theme_options`.
 149       *     @type string|string[] $theme_supports  Theme features required to support the panel.
 150       *     @type string          $title           Title of the panel to show in UI.
 151       *     @type string          $description     Description to show in the UI.
 152       *     @type string          $type            Type of the panel.
 153       *     @type callable        $active_callback Active callback.
 154       * }
 155       */
 156  	public function __construct( $manager, $id, $args = array() ) {
 157          $keys = array_keys( get_object_vars( $this ) );
 158          foreach ( $keys as $key ) {
 159              if ( isset( $args[ $key ] ) ) {
 160                  $this->$key = $args[ $key ];
 161              }
 162          }
 163  
 164          $this->manager = $manager;
 165          $this->id      = $id;
 166          if ( empty( $this->active_callback ) ) {
 167              $this->active_callback = array( $this, 'active_callback' );
 168          }
 169          self::$instance_count += 1;
 170          $this->instance_number = self::$instance_count;
 171  
 172          $this->sections = array(); // Users cannot customize the $sections array.
 173      }
 174  
 175      /**
 176       * Check whether panel is active to current Customizer preview.
 177       *
 178       * @since 4.1.0
 179       *
 180       * @return bool Whether the panel is active to the current preview.
 181       */
 182  	final public function active() {
 183          $panel  = $this;
 184          $active = call_user_func( $this->active_callback, $this );
 185  
 186          /**
 187           * Filters response of WP_Customize_Panel::active().
 188           *
 189           * @since 4.1.0
 190           *
 191           * @param bool               $active Whether the Customizer panel is active.
 192           * @param WP_Customize_Panel $panel  WP_Customize_Panel instance.
 193           */
 194          $active = apply_filters( 'customize_panel_active', $active, $panel );
 195  
 196          return $active;
 197      }
 198  
 199      /**
 200       * Default callback used when invoking WP_Customize_Panel::active().
 201       *
 202       * Subclasses can override this with their specific logic, or they may
 203       * provide an 'active_callback' argument to the constructor.
 204       *
 205       * @since 4.1.0
 206       *
 207       * @return bool Always true.
 208       */
 209  	public function active_callback() {
 210          return true;
 211      }
 212  
 213      /**
 214       * Gather the parameters passed to client JavaScript via JSON.
 215       *
 216       * @since 4.1.0
 217       *
 218       * @return array The array to be exported to the client as JSON.
 219       */
 220  	public function json() {
 221          $array                          = wp_array_slice_assoc( (array) $this, array( 'id', 'description', 'priority', 'type' ) );
 222          $array['title']                 = html_entity_decode( $this->title, ENT_QUOTES, get_bloginfo( 'charset' ) );
 223          $array['content']               = $this->get_content();
 224          $array['active']                = $this->active();
 225          $array['instanceNumber']        = $this->instance_number;
 226          $array['autoExpandSoleSection'] = $this->auto_expand_sole_section;
 227          return $array;
 228      }
 229  
 230      /**
 231       * Checks required user capabilities and whether the theme has the
 232       * feature support required by the panel.
 233       *
 234       * @since 4.0.0
 235       * @since 5.9.0 Method was marked non-final.
 236       *
 237       * @return bool False if theme doesn't support the panel or the user doesn't have the capability.
 238       */
 239  	public function check_capabilities() {
 240          if ( $this->capability && ! current_user_can( $this->capability ) ) {
 241              return false;
 242          }
 243  
 244          if ( $this->theme_supports && ! current_theme_supports( ... (array) $this->theme_supports ) ) {
 245              return false;
 246          }
 247  
 248          return true;
 249      }
 250  
 251      /**
 252       * Get the panel's content template for insertion into the Customizer pane.
 253       *
 254       * @since 4.1.0
 255       *
 256       * @return string Content for the panel.
 257       */
 258  	final public function get_content() {
 259          ob_start();
 260          $this->maybe_render();
 261          return trim( ob_get_clean() );
 262      }
 263  
 264      /**
 265       * Check capabilities and render the panel.
 266       *
 267       * @since 4.0.0
 268       */
 269  	final public function maybe_render() {
 270          if ( ! $this->check_capabilities() ) {
 271              return;
 272          }
 273  
 274          /**
 275           * Fires before rendering a Customizer panel.
 276           *
 277           * @since 4.0.0
 278           *
 279           * @param WP_Customize_Panel $panel WP_Customize_Panel instance.
 280           */
 281          do_action( 'customize_render_panel', $this );
 282  
 283          /**
 284           * Fires before rendering a specific Customizer panel.
 285           *
 286           * The dynamic portion of the hook name, `$this->id`, refers to
 287           * the ID of the specific Customizer panel to be rendered.
 288           *
 289           * @since 4.0.0
 290           */
 291          do_action( "customize_render_panel_{$this->id}" );
 292  
 293          $this->render();
 294      }
 295  
 296      /**
 297       * Render the panel container, and then its contents (via `this->render_content()`) in a subclass.
 298       *
 299       * Panel containers are now rendered in JS by default, see WP_Customize_Panel::print_template().
 300       *
 301       * @since 4.0.0
 302       */
 303  	protected function render() {}
 304  
 305      /**
 306       * Render the panel UI in a subclass.
 307       *
 308       * Panel contents are now rendered in JS by default, see WP_Customize_Panel::print_template().
 309       *
 310       * @since 4.1.0
 311       */
 312  	protected function render_content() {}
 313  
 314      /**
 315       * Render the panel's JS templates.
 316       *
 317       * This function is only run for panel types that have been registered with
 318       * WP_Customize_Manager::register_panel_type().
 319       *
 320       * @since 4.3.0
 321       *
 322       * @see WP_Customize_Manager::register_panel_type()
 323       */
 324  	public function print_template() {
 325          ?>
 326          <script type="text/html" id="tmpl-customize-panel-<?php echo esc_attr( $this->type ); ?>-content">
 327              <?php $this->content_template(); ?>
 328          </script>
 329          <script type="text/html" id="tmpl-customize-panel-<?php echo esc_attr( $this->type ); ?>">
 330              <?php $this->render_template(); ?>
 331          </script>
 332          <?php
 333      }
 334  
 335      /**
 336       * An Underscore (JS) template for rendering this panel's container.
 337       *
 338       * Class variables for this panel class are available in the `data` JS object;
 339       * export custom variables by overriding WP_Customize_Panel::json().
 340       *
 341       * @see WP_Customize_Panel::print_template()
 342       *
 343       * @since 4.3.0
 344       */
 345  	protected function render_template() {
 346          ?>
 347          <li id="accordion-panel-{{ data.id }}" class="accordion-section control-section control-panel control-panel-{{ data.type }}">
 348              <h3 class="accordion-section-title" tabindex="0">
 349                  {{ data.title }}
 350                  <span class="screen-reader-text"><?php _e( 'Press return or enter to open this panel' ); ?></span>
 351              </h3>
 352              <ul class="accordion-sub-container control-panel-content"></ul>
 353          </li>
 354          <?php
 355      }
 356  
 357      /**
 358       * An Underscore (JS) template for this panel's content (but not its container).
 359       *
 360       * Class variables for this panel class are available in the `data` JS object;
 361       * export custom variables by overriding WP_Customize_Panel::json().
 362       *
 363       * @see WP_Customize_Panel::print_template()
 364       *
 365       * @since 4.3.0
 366       */
 367  	protected function content_template() {
 368          ?>
 369          <li class="panel-meta customize-info accordion-section <# if ( ! data.description ) { #> cannot-expand<# } #>">
 370              <button class="customize-panel-back" tabindex="-1"><span class="screen-reader-text"><?php _e( 'Back' ); ?></span></button>
 371              <div class="accordion-section-title">
 372                  <span class="preview-notice">
 373                  <?php
 374                      /* translators: %s: The site/panel title in the Customizer. */
 375                      printf( __( 'You are customizing %s' ), '<strong class="panel-title">{{ data.title }}</strong>' );
 376                  ?>
 377                  </span>
 378                  <# if ( data.description ) { #>
 379                      <button type="button" class="customize-help-toggle dashicons dashicons-editor-help" aria-expanded="false"><span class="screen-reader-text"><?php _e( 'Help' ); ?></span></button>
 380                  <# } #>
 381              </div>
 382              <# if ( data.description ) { #>
 383                  <div class="description customize-panel-description">
 384                      {{{ data.description }}}
 385                  </div>
 386              <# } #>
 387  
 388              <div class="customize-control-notifications-container"></div>
 389          </li>
 390          <?php
 391      }
 392  }
 393  
 394  /** WP_Customize_Nav_Menus_Panel class */
 395  require_once  ABSPATH . WPINC . '/customize/class-wp-customize-nav-menus-panel.php';