class InputRequired

Same name in other branches
  1. 8.9.x core/modules/views/src/Plugin/views/exposed_form/InputRequired.php \Drupal\views\Plugin\views\exposed_form\InputRequired
  2. 10 core/modules/views/src/Plugin/views/exposed_form/InputRequired.php \Drupal\views\Plugin\views\exposed_form\InputRequired
  3. 11.x core/modules/views/src/Plugin/views/exposed_form/InputRequired.php \Drupal\views\Plugin\views\exposed_form\InputRequired

Exposed form plugin that provides an exposed form with required input.

Plugin annotation


@ViewsExposedForm(
  id = "input_required",
  title = @Translation("Input required"),
  help = @Translation("An exposed form that only renders a view if the form contains user input.")
)

Hierarchy

Expanded class hierarchy of InputRequired

Related topics

File

core/modules/views/src/Plugin/views/exposed_form/InputRequired.php, line 19

Namespace

Drupal\views\Plugin\views\exposed_form
View source
class InputRequired extends ExposedFormPluginBase {
    protected function defineOptions() {
        $options = parent::defineOptions();
        $options['text_input_required'] = [
            'default' => $this->t('Select any filter and click on Apply to see results'),
        ];
        $options['text_input_required_format'] = [
            'default' => NULL,
        ];
        return $options;
    }
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
        parent::buildOptionsForm($form, $form_state);
        $form['text_input_required'] = [
            '#type' => 'text_format',
            '#title' => $this->t('Text on demand'),
            '#description' => $this->t('Text to display instead of results until the user selects and applies an exposed filter.'),
            '#default_value' => $this->options['text_input_required'],
            '#format' => $this->options['text_input_required_format'] ?? filter_default_format(),
            '#editor' => FALSE,
        ];
    }
    public function submitOptionsForm(&$form, FormStateInterface $form_state) {
        $exposed_form_options = $form_state->getValue('exposed_form_options');
        $form_state->setValue([
            'exposed_form_options',
            'text_input_required_format',
        ], $exposed_form_options['text_input_required']['format']);
        $form_state->setValue([
            'exposed_form_options',
            'text_input_required',
        ], $exposed_form_options['text_input_required']['value']);
        parent::submitOptionsForm($form, $form_state);
    }
    protected function exposedFilterApplied() {
        static $cache = NULL;
        if (!isset($cache)) {
            $view = $this->view;
            if (is_array($view->filter) && count($view->filter)) {
                foreach ($view->filter as $filter) {
                    if ($filter->isExposed()) {
                        $identifier = $filter->options['expose']['identifier'];
                        if (isset($view->getExposedInput()[$identifier])) {
                            $cache = TRUE;
                            return $cache;
                        }
                    }
                }
            }
            $cache = FALSE;
        }
        return $cache;
    }
    public function preRender($values) {
        // Display the "text on demand" if needed. This is a site builder-defined
        // text to display instead of results until the user selects and applies
        // an exposed filter.
        if (!$this->exposedFilterApplied()) {
            $options = [
                'id' => 'area',
                'table' => 'views',
                'field' => 'area',
                'label' => '',
                'relationship' => 'none',
                'group_type' => 'group',
                // We need to set the "Display even if view has no result" option to
                // TRUE as the input required exposed form plugin will always force an
                // empty result if no exposed filters are applied.
'empty' => TRUE,
                'content' => [
                    // @see \Drupal\views\Plugin\views\area\Text::render()
'value' => $this->options['text_input_required'],
                    'format' => $this->options['text_input_required_format'],
                ],
            ];
            $handler = Views::handlerManager('area')->getHandler($options);
            $handler->init($this->view, $this->displayHandler, $options);
            $this->displayHandler->handlers['empty'] = [
                'area' => $handler,
            ];
            // Override the existing empty result message (if applicable).
            $this->displayHandler
                ->setOption('empty', [
                'text' => $options,
            ]);
        }
    }
    public function query() {
        if (!$this->exposedFilterApplied()) {
            // We return with no query; this will force the empty text.
            $this->view->built = TRUE;
            $this->view->executed = TRUE;
            $this->view->result = [];
        }
        else {
            parent::query();
        }
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
DerivativeInspectionInterface::getBaseId public function Gets the base_plugin_id of the plugin instance. 1
DerivativeInspectionInterface::getDerivativeId public function Gets the derivative_id of the plugin instance. 1
ExposedFormPluginBase::$usesOptions protected property Denotes whether the plugin has an additional options form. Overrides PluginBase::$usesOptions
ExposedFormPluginBase::exposedFormAlter public function Alters the exposed form. Overrides ExposedFormPluginInterface::exposedFormAlter
ExposedFormPluginBase::exposedFormSubmit public function Submits the exposed form. Overrides ExposedFormPluginInterface::exposedFormSubmit
ExposedFormPluginBase::exposedFormValidate public function Validates the exposed form submission. Overrides ExposedFormPluginInterface::exposedFormValidate
ExposedFormPluginBase::getCacheContexts public function The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts
ExposedFormPluginBase::getCacheMaxAge public function The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
ExposedFormPluginBase::getCacheTags public function The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags
ExposedFormPluginBase::postExecute public function Runs after the view has been executed. Overrides ExposedFormPluginInterface::postExecute
ExposedFormPluginBase::postRender public function Runs after the view has been rendered. Overrides ExposedFormPluginInterface::postRender
ExposedFormPluginBase::preExecute public function Runs before the view has been executed. Overrides ExposedFormPluginInterface::preExecute
ExposedFormPluginBase::renderExposedForm public function Renders the exposed form. Overrides ExposedFormPluginInterface::renderExposedForm
ExposedFormPluginBase::resetForm public function Resets all the states of the exposed form.
InputRequired::buildOptionsForm public function Provide a form to edit options for this plugin. Overrides ExposedFormPluginBase::buildOptionsForm
InputRequired::defineOptions protected function Information about options for all kinds of purposes will be held here. Overrides ExposedFormPluginBase::defineOptions
InputRequired::exposedFilterApplied protected function
InputRequired::preRender public function Runs before the view is rendered. Overrides ExposedFormPluginBase::preRender
InputRequired::query public function Add anything to the query that we might need to. Overrides ExposedFormPluginBase::query
InputRequired::submitOptionsForm public function Handle any special handling on the validate form. Overrides PluginBase::submitOptionsForm
PluginBase::$definition public property Plugins' definition.
PluginBase::$displayHandler public property The display object this plugin is for.
PluginBase::$options public property Options for this plugin will be held here.
PluginBase::$renderer protected property Stores the render API renderer. 3
PluginBase::$view public property The top object of a view. 1
PluginBase::calculateDependencies public function Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies 14
PluginBase::create public static function Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create 63
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::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::init public function Initialize the plugin. Overrides ViewsPluginInterface::init 6
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::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 Unpacks options over our existing defaults. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions public function Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions 8
PluginBase::validate public function Validate that the plugin is correct and can be saved. Overrides ViewsPluginInterface::validate 6
PluginBase::validateOptionsForm public function Validate the options form. Overrides ViewsPluginInterface::validateOptionsForm 15
PluginBase::viewsTokenReplace protected function Replaces Views' tokens in a given string. 1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT constant Query string to indicate the site default language.
PluginBase::__construct public function Constructs a PluginBase object. 19
PluginInspectionInterface::getPluginDefinition public function Gets the definition of the plugin implementation. 6
PluginInspectionInterface::getPluginId public function Gets the plugin_id of the plugin instance. 2
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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