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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Render\Element\Dropbutton. | |
| */ | |
| namespace Drupal\Core\Render\Element; | |
| /** | |
| * Provides a render element for a set of links rendered as a drop-down button. | |
| * | |
| * By default, this element sets #theme so that the 'links' theme hook is used | |
| * for rendering, with suffixes so that themes can override this specifically | |
| * without overriding all links theming. If the #subtype property is provided in | |
| * your render array with value 'foo', #theme is set to links__dropbutton__foo; | |
| * if not, it's links__dropbutton; both of these can be overridden by setting | |
| * the #theme property in your render array. See template_preprocess_links() | |
| * for documentation on the other properties used in theming; for instance, use | |
| * element property #links to provide $variables['links'] for theming. | |
| * | |
| * Properties: | |
| * - #links: An array of links to actions. See template_preprocess_links() for | |
| * documentation the properties of links in this array. | |
| * | |
| * Usage Example: | |
| * @code | |
| * $form['actions']['extra_actions'] = array( | |
| * '#type' => 'dropbutton', | |
| * '#links' => array( | |
| * 'simple_form' => array( | |
| * 'title' => $this->t('Simple Form'), | |
| * 'url' => Url::fromRoute('fapi_example.simple_form'), | |
| * ), | |
| * 'demo' => array( | |
| * 'title' => $this->t('Build Demo'), | |
| * 'url' => Url::fromRoute('fapi_example.build_demo'), | |
| * ), | |
| * ), | |
| * ); | |
| * @endcode | |
| * | |
| * @see \Drupal\Core\Render\Element\Operations | |
| * | |
| * @RenderElement("dropbutton") | |
| */ | |
| class Dropbutton extends RenderElement { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getInfo() { | |
| $class = get_class($this); | |
| return array( | |
| '#pre_render' => array( | |
| array($class, 'preRenderDropbutton'), | |
| ), | |
| '#theme' => 'links__dropbutton', | |
| ); | |
| } | |
| /** | |
| * Pre-render callback: Attaches the dropbutton library and required markup. | |
| */ | |
| public static function preRenderDropbutton($element) { | |
| $element['#attached']['library'][] = 'core/drupal.dropbutton'; | |
| $element['#attributes']['class'][] = 'dropbutton'; | |
| if (!isset($element['#theme_wrappers'])) { | |
| $element['#theme_wrappers'] = array(); | |
| } | |
| array_unshift($element['#theme_wrappers'], 'dropbutton_wrapper'); | |
| // Enable targeted theming of specific dropbuttons (e.g., 'operations' or | |
| // 'operations__node'). | |
| if (isset($element['#subtype'])) { | |
| $element['#theme'] .= '__' . $element['#subtype']; | |
| } | |
| return $element; | |
| } | |
| } |