PHP DisplayPluginBase::usesExposed方法代码示例

 /**
  * Block views use exposed widgets only if AJAX is set.
  */
 public function usesExposed()
 {
     if ($this->ajaxEnabled()) {
         return parent::usesExposed();
     }
     return FALSE;
 }

 /**
  * Build the query for the view.
  */
 public function build($display_id = NULL)
 {
     if (!empty($this->built)) {
         return;
     }
     if (empty($this->current_display) || $display_id) {
         if (!$this->setDisplay($display_id)) {
             return FALSE;
         }
     }
     // Let modules modify the view just prior to building it.
     $module_handler = \Drupal::moduleHandler();
     $module_handler->invokeAll('views_pre_build', array($this));
     // Attempt to load from cache.
     // @todo Load a build_info from cache.
     $start = microtime(TRUE);
     // If that fails, let's build!
     $this->build_info = array('query' => '', 'count_query' => '', 'query_args' => array());
     $this->initQuery();
     // Call a module hook and see if it wants to present us with a
     // pre-built query or instruct us not to build the query for
     // some reason.
     // @todo: Implement this. Use the same mechanism Panels uses.
     // Run through our handlers and ensure they have necessary information.
     $this->initHandlers();
     // Let the handlers interact with each other if they really want.
     $this->_preQuery();
     if ($this->display_handler->usesExposed()) {
         $exposed_form = $this->display_handler->getPlugin('exposed_form');
         $this->exposed_widgets = $exposed_form->renderExposedForm();
         if (FormState::hasAnyErrors() || !empty($this->build_info['abort'])) {
             $this->built = TRUE;
             // Don't execute the query, $form_state, but rendering will still be executed to display the empty text.
             $this->executed = TRUE;
             return empty($this->build_info['fail']);
         }
     }
     // Build all the relationships first thing.
     $this->_build('relationship');
     // Set the filtering groups.
     if (!empty($this->filter)) {
         $filter_groups = $this->display_handler->getOption('filter_groups');
         if ($filter_groups) {
             $this->query->setGroupOperator($filter_groups['operator']);
             foreach ($filter_groups['groups'] as $id => $operator) {
                 $this->query->setWhereGroup($operator, $id);
             }
         }
     }
     // Build all the filters.
     $this->_build('filter');
     $this->build_sort = TRUE;
     // Arguments can, in fact, cause this whole thing to abort.
     if (!$this->_buildArguments()) {
         $this->build_time = microtime(TRUE) - $start;
         $this->attachDisplays();
         return $this->built;
     }
     // Initialize the style; arguments may have changed which style we use,
     // so waiting as long as possible is important. But we need to know
     // about the style when we go to build fields.
     if (!$this->initStyle()) {
         $this->build_info['fail'] = TRUE;
         return FALSE;
     }
     if ($this->style_plugin->usesFields()) {
         $this->_build('field');
     }
     // Build our sort criteria if we were instructed to do so.
     if (!empty($this->build_sort)) {
         // Allow the style handler to deal with sorting.
         if ($this->style_plugin->buildSort()) {
             $this->_build('sort');
         }
         // allow the plugin to build second sorts as well.
         $this->style_plugin->buildSortPost();
     }
     // Allow area handlers to affect the query.
     $this->_build('header');
     $this->_build('footer');
     $this->_build('empty');
     // Allow display handler to affect the query:
     $this->display_handler->query($this->display_handler->useGroupBy());
     // Allow style handler to affect the query:
     $this->style_plugin->query($this->display_handler->useGroupBy());
     // Allow exposed form to affect the query:
     if (isset($exposed_form)) {
         $exposed_form->query();
     }
     if (\Drupal::config('views.settings')->get('sql_signature')) {
         $this->query->addSignature($this);
     }
     // Let modules modify the query just prior to finalizing it.
     $this->query->alter($this);
     // Only build the query if we weren't interrupted.
     if (empty($this->built)) {
         // Build the necessary info to execute the query.
//.........这里部分代码省略.........

 /**
  * Attachment displays only use exposed widgets if
  * they are set to inherit the exposed filter settings
  * of their parent display.
  */
 public function usesExposed()
 {
     if (!empty($this->options['inherit_exposed_filters']) && parent::usesExposed()) {
         return TRUE;
     }
     return FALSE;
 }