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class Pager in Drupal 8

Same name in this branch
  1. 8 core/lib/Drupal/Core/Pager/Pager.php \Drupal\Core\Pager\Pager
  2. 8 core/lib/Drupal/Core/Render/Element/Pager.php \Drupal\Core\Render\Element\Pager
Same name and namespace in other branches
  1. 9 core/lib/Drupal/Core/Render/Element/Pager.php \Drupal\Core\Render\Element\Pager

Provides a render element for a pager.

The pager must be initialized with a call to \Drupal\Core\Pager\PagerManagerInterface::createPager() in order to render properly. When used with database queries, this is performed for you when you extend a select query with \Drupal\Core\Database\Query\PagerSelectExtender.

Properties:

  • #element: (optional, int) The pager ID, to distinguish between multiple pagers on the same page (defaults to 0).
  • #parameters: (optional) An associative array of query string parameters to append to the pager.
  • #quantity: The maximum number of numbered page links to create (defaults to 9).
  • #tags: (optional) An array of labels for the controls in the pages.
  • #route_name: (optional) The name of the route to be used to build pager links. Defaults to '<none>', which will make links relative to the current URL. This makes the page more effectively cacheable.
$build['pager'] = [
  '#type' => 'pager',
];

Plugin annotation

@RenderElement("pager");

Hierarchy

Expanded class hierarchy of Pager

7 string references to 'Pager'
AreaDisplayLinkTest::assertWarningMessages in core/modules/views/tests/src/Kernel/Handler/AreaDisplayLinkTest.php
Assert the warning messages are shown after changing the page_1 display.
DisplayLink::validate in core/modules/views/src/Plugin/views/area/DisplayLink.php
Validate that the plugin is correct and can be saved.
DisplayPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
Provide a form to edit options for this plugin.
DisplayPluginBase::optionsSummary in core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
Provides the default summary for options in the views UI.
PagersCacheContext::getLabel in core/lib/Drupal/Core/Cache/Context/PagersCacheContext.php
Returns the label of the cache context.

... See full list

15 #type uses of Pager
AggregatorController::buildPageList in core/modules/aggregator/src/Controller/AggregatorController.php
Builds a listing of aggregator feed items.
CommentAdminOverview::buildForm in core/modules/comment/src/Form/CommentAdminOverview.php
Form constructor for the comment overview administration form.
DbLogController::overview in core/modules/dblog/src/Controller/DbLogController.php
Displays a listing of database log messages.
DbLogController::topLogMessages in core/modules/dblog/src/Controller/DbLogController.php
Shows the most frequent log messages of a given event type.
EntityListBuilder::render in core/lib/Drupal/Core/Entity/EntityListBuilder.php
Builds the entity listing as renderable array for table.html.twig.

... See full list

File

core/lib/Drupal/Core/Render/Element/Pager.php, line 33

Namespace

Drupal\Core\Render\Element
View source
class Pager extends RenderElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    return [
      '#pre_render' => [
        get_class($this) . '::preRenderPager',
      ],
      '#theme' => 'pager',
      // The pager ID, to distinguish between multiple pagers on the same page.
      '#element' => 0,
      // An associative array of query string parameters to append to the pager
      // links.
      '#parameters' => [],
      // The number of pages in the list.
      '#quantity' => 9,
      // An array of labels for the controls in the pager.
      '#tags' => [],
      // The name of the route to be used to build pager links. By default no
      // path is provided, which will make links relative to the current URL.
      // This makes the page more effectively cacheable.
      '#route_name' => '<none>',
    ];
  }

  /**
   * #pre_render callback to associate the appropriate cache context.
   *
   *
   * @param array $pager
   *   A renderable array of #type => pager.
   *
   * @return array
   */
  public static function preRenderPager(array $pager) {

    // Note: the default pager theme process function
    // template_preprocess_pager() also calls
    // \Drupal\Core\Pager\PagerManagerInterface::getUpdatedParameters(), which
    // maintains the existing query string. Therefore
    // template_preprocess_pager() adds the 'url.query_args' cache context,
    // which causes the more specific cache context below to be optimized away.
    // In other themes, however, that may not be the case.
    $pager['#cache']['contexts'][] = 'url.query_args.pagers:' . $pager['#element'];
    return $pager;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
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
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
Pager::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
Pager::preRenderPager public static function #pre_render callback to associate the appropriate cache context.
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
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::isConfigurable public function Determines if the plugin is configurable.
PluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. 92
RenderElement::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup public static function Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm public static function Form element processing handler for the #ajax form property. 1
RenderElement::processGroup public static function Arranges elements into groups.
RenderElement::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes
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.