class DisplayLink in Drupal 8

Same name and namespace in other branches

9 core/modules/views/src/Plugin/views/area/DisplayLink.php \Drupal\views\Plugin\views\area\DisplayLink
10 core/modules/views/src/Plugin/views/area/DisplayLink.php \Drupal\views\Plugin\views\area\DisplayLink

Views area display_link handler.

Plugin annotation

@ViewsArea("display_link");

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\views\Plugin\views\PluginBase implements DependentPluginInterface, ContainerFactoryPluginInterface, TrustedCallbackInterface, ViewsPluginInterface
    class \Drupal\views\Plugin\views\HandlerBase implements ViewsHandlerInterface
    class \Drupal\views\Plugin\views\area\AreaPluginBase
    class \Drupal\views\Plugin\views\area\DisplayLink

Expanded class hierarchy of DisplayLink

File

core/modules/views/src/Plugin/views/area/DisplayLink.php, line 18

Namespace

Drupal\views\Plugin\views\area

View source

class DisplayLink extends AreaPluginBase {

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['display_id'] = [
      'default' => NULL,
    ];
    $options['label'] = [
      'default' => NULL,
    ];
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);
    $allowed_displays = [];
    $displays = $this->view->storage
      ->get('display');
    foreach ($displays as $display_id => $display) {
      if (!$this
        ->isPathBasedDisplay($display_id)) {
        unset($displays[$display_id]);
        continue;
      }
      $allowed_displays[$display_id] = $display['display_title'];
    }
    $form['description'] = [
      [
        '#markup' => $this
          ->t('To make sure the results are the same when switching to the other display, it is recommended to make sure the display:'),
      ],
      [
        '#theme' => 'item_list',
        '#items' => [
          $this
            ->t('Has a path.'),
          $this
            ->t('Has the same filter criteria.'),
          $this
            ->t('Has the same sort criteria.'),
          $this
            ->t('Has the same pager settings.'),
          $this
            ->t('Has the same contextual filters.'),
        ],
      ],
    ];
    if (!$allowed_displays) {
      $form['empty_message'] = [
        '#markup' => '<p><em>' . $this
          ->t('There are no path-based displays available.') . '</em></p>',
      ];
    }
    else {
      $form['display_id'] = [
        '#title' => $this
          ->t('Display'),
        '#type' => 'select',
        '#options' => $allowed_displays,
        '#default_value' => $this->options['display_id'],
        '#required' => TRUE,
      ];
      $form['label'] = [
        '#title' => $this
          ->t('Label'),
        '#description' => $this
          ->t('The text of the link.'),
        '#type' => 'textfield',
        '#default_value' => $this->options['label'],
        '#required' => TRUE,
      ];
    }
  }

  /**
   * {@inheritdoc}
   */
  public function validate() {
    $errors = parent::validate();

    // Do not add errors for the default display if it is not displayed in the
    // UI.
    if ($this->displayHandler
      ->isDefaultDisplay() && !\Drupal::config('views.settings')
      ->get('ui.show.master_display')) {
      return $errors;
    }

    // Ajax errors can cause the plugin to be added without any settings.
    $linked_display_id = !empty($this->options['display_id']) ? $this->options['display_id'] : NULL;
    if (!$linked_display_id) {
      $errors[] = $this
        ->t('%current_display: The link in the %area area has no configured display.', [
        '%current_display' => $this->displayHandler->display['display_title'],
        '%area' => $this->areaType,
      ]);
      return $errors;
    }

    // Check if the linked display hasn't been removed.
    if (!$this->view->displayHandlers
      ->get($linked_display_id)) {
      $errors[] = $this
        ->t('%current_display: The link in the %area area points to the %linked_display display which no longer exists.', [
        '%current_display' => $this->displayHandler->display['display_title'],
        '%area' => $this->areaType,
        '%linked_display' => $this->options['display_id'],
      ]);
      return $errors;
    }

    // Check if the linked display is a path-based display.
    if (!$this
      ->isPathBasedDisplay($linked_display_id)) {
      $errors[] = $this
        ->t('%current_display: The link in the %area area points to the %linked_display display which does not have a path.', [
        '%current_display' => $this->displayHandler->display['display_title'],
        '%area' => $this->areaType,
        '%linked_display' => $this->view->displayHandlers
          ->get($linked_display_id)->display['display_title'],
      ]);
      return $errors;
    }

    // Check if options of the linked display are equal to the options of the
    // current display. We "only" show a warning here, because even though we
    // recommend keeping the display options equal, we do not want to enforce
    // this.
    $unequal_options = [
      'filters' => t('Filter criteria'),
      'sorts' => t('Sort criteria'),
      'pager' => t('Pager'),
      'arguments' => t('Contextual filters'),
    ];
    foreach (array_keys($unequal_options) as $option) {
      if ($this
        ->hasEqualOptions($linked_display_id, $option)) {
        unset($unequal_options[$option]);
      }
    }
    if ($unequal_options) {
      $warning = $this
        ->t('%current_display: The link in the %area area points to the %linked_display display which uses different settings than the %current_display display for: %unequal_options. To make sure users see the exact same result when clicking the link, please check that the settings are the same.', [
        '%current_display' => $this->displayHandler->display['display_title'],
        '%area' => $this->areaType,
        '%linked_display' => $this->view->displayHandlers
          ->get($linked_display_id)->display['display_title'],
        '%unequal_options' => implode(', ', $unequal_options),
      ]);
      $this
        ->messenger()
        ->addWarning($warning);
    }
    return $errors;
  }

  /**
   * {@inheritdoc}
   */
  public function render($empty = FALSE) {
    if ($empty && empty($this->options['empty']) || empty($this->options['display_id'])) {
      return [];
    }
    if (!$this
      ->isPathBasedDisplay($this->options['display_id'])) {
      return [];
    }

    // Get query parameters from the exposed input and pager.
    $query = $this->view
      ->getExposedInput();
    if ($current_page = $this->view
      ->getCurrentPage()) {
      $query['page'] = $current_page;
    }

    // @todo Remove this parsing once these are removed from the request in
    //   https://www.drupal.org/node/2504709.
    foreach ([
      'view_name',
      'view_display_id',
      'view_args',
      'view_path',
      'view_dom_id',
      'pager_element',
      'view_base_path',
      AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER,
      FormBuilderInterface::AJAX_FORM_REQUEST,
      MainContentViewSubscriber::WRAPPER_FORMAT,
    ] as $key) {
      unset($query[$key]);
    }

    // Set default classes.
    $classes = [
      'views-display-link',
      'views-display-link-' . $this->options['display_id'],
    ];
    if ($this->options['display_id'] === $this->view->current_display) {
      $classes[] = 'is-active';
    }
    return [
      '#type' => 'link',
      '#title' => $this->options['label'],
      '#url' => $this->view
        ->getUrl($this->view->args, $this->options['display_id'])
        ->setOptions([
        'query' => $query,
      ]),
      '#options' => [
        'view' => $this->view,
        'target_display_id' => $this->options['display_id'],
        'attributes' => [
          'class' => $classes,
        ],
      ],
    ];
  }

  /**
   * Check if a views display is a path-based display.
   *
   * @param string $display_id
   *   The display ID to check.
   *
   * @return bool
   *   Whether the display ID is an allowed display or not.
   */
  protected function isPathBasedDisplay($display_id) {
    $loaded_display = $this->view->displayHandlers
      ->get($display_id);
    return $loaded_display instanceof PathPluginBase;
  }

  /**
   * Check if the options of a views display are equal to the current display.
   *
   * @param string $display_id
   *   The display ID to check.
   * @param string $option
   *   The option to check.
   *
   * @return bool
   *   Whether the option of the view display are equal to the current display
   *   or not.
   */
  protected function hasEqualOptions($display_id, $option) {
    $loaded_display = $this->view->displayHandlers
      ->get($display_id);
    return $loaded_display
      ->getOption($option) === $this->displayHandler
      ->getOption($option);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AreaPluginBase::$areaType	public	property	The type of this area handler, i.e. 'header', 'footer', or 'empty'.
AreaPluginBase::adminSummary	public	function	Provide text for the administrative summary. Overrides HandlerBase::adminSummary
AreaPluginBase::init	public	function	Overrides Drupal\views\Plugin\views\HandlerBase::init(). Overrides HandlerBase::init	1
AreaPluginBase::isEmpty	public	function	Does that area have nothing to show.	1
AreaPluginBase::preRender	public	function	Performs any operations needed before full rendering.	1
AreaPluginBase::usesGroupBy	public	function	Provides the handler some groupby. Overrides HandlerBase::usesGroupBy
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
DisplayLink::buildOptionsForm	public	function	Provide a form to edit options for this plugin. Overrides AreaPluginBase::buildOptionsForm
DisplayLink::defineOptions	protected	function	Information about options for all kinds of purposes will be held here. Overrides AreaPluginBase::defineOptions
DisplayLink::hasEqualOptions	protected	function	Check if the options of a views display are equal to the current display.
DisplayLink::isPathBasedDisplay	protected	function	Check if a views display is a path-based display.
DisplayLink::render	public	function	Render the area. Overrides AreaPluginBase::render
DisplayLink::validate	public	function	Validate that the plugin is correct and can be saved. Overrides HandlerBase::validate
HandlerBase::$field	public	property	With field you can override the realField if the real field is not set.
HandlerBase::$moduleHandler	protected	property	The module handler.	3
HandlerBase::$query	public	property	Where the $query object will reside:	7
HandlerBase::$realField	public	property	The actual field in the database table, maybe different on other kind of query plugins/special handlers.
HandlerBase::$relationship	public	property	The relationship used for this field.
HandlerBase::$table	public	property	The table this handler is attached to.
HandlerBase::$tableAlias	public	property	The alias of the table of this handler which is used in the query.
HandlerBase::$viewsData	protected	property	The views data service.
HandlerBase::acceptExposedInput	public	function	Take input from exposed handlers and assign to this handler, if necessary.	1
HandlerBase::access	public	function	Check whether given user has access to this handler. Overrides ViewsHandlerInterface::access	4
HandlerBase::adminLabel	public	function	Return a string representing this handler's name in the UI. Overrides ViewsHandlerInterface::adminLabel	4
HandlerBase::breakString	public static	function	Breaks x,y,z and x+y+z into an array. Overrides ViewsHandlerInterface::breakString
HandlerBase::broken	public	function	Determines if the handler is considered 'broken', meaning it's a placeholder used when a handler can't be found. Overrides ViewsHandlerInterface::broken
HandlerBase::buildExposedForm	public	function	Render our chunk of the exposed handler form when selecting	1
HandlerBase::buildExposeForm	public	function	Form for exposed handler options.	2
HandlerBase::buildExtraOptionsForm	public	function	Provide a form for setting options.	1
HandlerBase::buildGroupByForm	public	function	Provide a form for aggregation settings.	1
HandlerBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides PluginBase::calculateDependencies	10
HandlerBase::canExpose	public	function	Determine if a handler can be exposed.	2
HandlerBase::caseTransform	protected	function	Transform a string by a certain method.
HandlerBase::defaultExposeOptions	public	function	Set new exposed option defaults when exposed setting is flipped on.	2
HandlerBase::defineExtraOptions	public	function	Provide defaults for the handler.
HandlerBase::displayExposedForm	public	function	Displays the Expose form.
HandlerBase::ensureMyTable	public	function	Ensure the main table for this handler is in the query. This is used a lot. Overrides ViewsHandlerInterface::ensureMyTable	2
HandlerBase::exposedInfo	public	function	Get information about the exposed form for the form renderer.	1
HandlerBase::getDateField	public	function	Creates cross-database SQL dates.	2
HandlerBase::getDateFormat	public	function	Creates cross-database SQL date formatting.	2
HandlerBase::getEntityType	public	function	Determines the entity type used by this handler. Overrides ViewsHandlerInterface::getEntityType
HandlerBase::getField	public	function	Shortcut to get a handler's raw field value. Overrides ViewsHandlerInterface::getField
HandlerBase::getJoin	public	function	Get the join object that should be used for this handler. Overrides ViewsHandlerInterface::getJoin
HandlerBase::getModuleHandler	protected	function	Gets the module handler.
HandlerBase::getTableJoin	public static	function	Fetches a handler to join one table to a primary table from the data cache. Overrides ViewsHandlerInterface::getTableJoin
HandlerBase::getViewsData	protected	function	Gets views data service.
HandlerBase::hasExtraOptions	public	function	If a handler has 'extra options' it will get a little settings widget and another form called extra_options.	1
HandlerBase::isAGroup	public	function	Returns TRUE if the exposed filter works like a grouped filter.	1
HandlerBase::isExposed	public	function	Determine if this item is 'exposed', meaning it provides form elements to let users modify the view.
HandlerBase::multipleExposedInput	public	function	Define if the exposed input has to be submitted multiple times. This is TRUE when exposed filters grouped are using checkboxes as widgets.	1
HandlerBase::placeholder	protected	function	Provides a unique placeholders for handlers.
HandlerBase::postExecute	public	function	Run after the view is executed, before the result is cached. Overrides ViewsHandlerInterface::postExecute
HandlerBase::preQuery	public	function	Run before the view is built. Overrides ViewsHandlerInterface::preQuery	2
HandlerBase::query	public	function	Add anything to the query that we might need to. Overrides PluginBase::query	7
HandlerBase::sanitizeValue	public	function	Sanitize the value for output. Overrides ViewsHandlerInterface::sanitizeValue
HandlerBase::setModuleHandler	public	function	Sets the module handler.
HandlerBase::setRelationship	public	function	Called just prior to query(), this lets a handler set up any relationship it needs. Overrides ViewsHandlerInterface::setRelationship
HandlerBase::setViewsData	public	function
HandlerBase::showExposeButton	public	function	Shortcut to display the expose/hide button.	2
HandlerBase::showExposeForm	public	function	Shortcut to display the exposed options form. Overrides ViewsHandlerInterface::showExposeForm
HandlerBase::storeExposedInput	public	function	If set to remember exposed input in the session, store it there.	1
HandlerBase::submitExposed	public	function	Submit the exposed handler form
HandlerBase::submitExposeForm	public	function	Perform any necessary changes to the form exposes prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitExtraOptionsForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitFormCalculateOptions	public	function	Calculates options stored on the handler	1
HandlerBase::submitGroupByForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.	1
HandlerBase::submitTemporaryForm	public	function	A submit handler that is used for storing temporary items when using multi-step changes, such as ajax requests.
HandlerBase::validateExposed	public	function	Validate the exposed handler form	4
HandlerBase::validateExposeForm	public	function	Validate the options form.	1
HandlerBase::validateExtraOptionsForm	public	function	Validate the options form.
HandlerBase::__construct	public	function	Constructs a Handler object. Overrides PluginBase::__construct	44
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$definition	public	property	Plugins's definition
PluginBase::$displayHandler	public	property	The display object this plugin is for.
PluginBase::$options	public	property	Options for this plugin will be held here.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::$renderer	protected	property	Stores the render API renderer.	3
PluginBase::$usesOptions	protected	property	Denotes whether the plugin has an additional options form.	8
PluginBase::$view	public	property	The top object of a view.	1
PluginBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	62
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::destroy	public	function	Clears a plugin. Overrides ViewsPluginInterface::destroy	2
PluginBase::doFilterByDefinedOptions	protected	function	Do the work to filter out stored options depending on the defined options.
PluginBase::filterByDefinedOptions	public	function	Filter out stored options depending on the defined options. Overrides ViewsPluginInterface::filterByDefinedOptions
PluginBase::getAvailableGlobalTokens	public	function	Returns an array of available token replacements. Overrides ViewsPluginInterface::getAvailableGlobalTokens
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::getProvider	public	function	Returns the plugin provider. Overrides ViewsPluginInterface::getProvider
PluginBase::getRenderer	protected	function	Returns the render API renderer.	1
PluginBase::globalTokenForm	public	function	Adds elements for available core tokens to a form. Overrides ViewsPluginInterface::globalTokenForm
PluginBase::globalTokenReplace	public	function	Returns a string with any core tokens replaced. Overrides ViewsPluginInterface::globalTokenReplace
PluginBase::INCLUDE_ENTITY		constant	Include entity row languages when listing languages.
PluginBase::INCLUDE_NEGOTIATED		constant	Include negotiated languages when listing languages.
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::listLanguages	protected	function	Makes an array of languages, optionally including special languages.
PluginBase::pluginTitle	public	function	Return the human readable name of the display. Overrides ViewsPluginInterface::pluginTitle
PluginBase::preRenderAddFieldsetMarkup	public static	function	Moves form elements into fieldsets for presentation purposes. Overrides ViewsPluginInterface::preRenderAddFieldsetMarkup
PluginBase::preRenderFlattenData	public static	function	Flattens the structure of form elements. Overrides ViewsPluginInterface::preRenderFlattenData
PluginBase::queryLanguageSubstitutions	public static	function	Returns substitutions for Views queries for languages.
PluginBase::setOptionDefaults	protected	function	Fills up the options of the plugin with defaults.
PluginBase::submitOptionsForm	public	function	Handle any special handling on the validate form. Overrides ViewsPluginInterface::submitOptionsForm	16
PluginBase::summaryTitle	public	function	Returns the summary of the settings in the display. Overrides ViewsPluginInterface::summaryTitle	6
PluginBase::themeFunctions	public	function	Provide a full list of possible theme templates used by this style. Overrides ViewsPluginInterface::themeFunctions	1
PluginBase::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks	6
PluginBase::unpackOptions	public	function	Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions	public	function	Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions	8
PluginBase::validateOptionsForm	public	function	Validate the options form. Overrides ViewsPluginInterface::validateOptionsForm	15
PluginBase::viewsTokenReplace	protected	function	Replaces Views' tokens in a given string. The resulting string will be sanitized with Xss::filterAdmin.	1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT		constant	Query string to indicate the site default language.
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.

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class DisplayLink in Drupal 8

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