config('blazy.settings');
$form['admin_css'] = [
'#type' => 'checkbox',
'#title' => $this->t('Admin CSS'),
'#default_value' => $config->get('admin_css'),
'#description' => $this->t('Uncheck to disable blazy related admin compact form styling, only if not compatible with your admin theme.'),
];
$form['responsive_image'] = [
'#type' => 'checkbox',
'#title' => $this->t('Support Responsive image'),
'#default_value' => $config->get('responsive_image'),
'#description' => $this->t('Check to support lazyloading for the core Responsive image module. Be sure to use Blazy formatter to have relevant styling.'),
];
$form['one_pixel'] = [
'#type' => 'checkbox',
'#title' => $this->t('One pixel placeholder'),
'#default_value' => $config->get('one_pixel'),
'#description' => $this->t('By default a one pixel image is the placeholder for lazyloaded Responsive image. Useful to perform a lot better. Uncheck to disable, and use Drupal-managed smallest/fallback image style instead. Be sure to add proper dimensions or at least min-height/min-width via CSS accordingly to avoid layout reflow since Aspect ratio is not supported with Responsive image yet. Disabling this will result in downloading fallback image as well for non-PICTURE element (double downloads).'),
];
$form['blazy'] = [
'#type' => 'container',
'#tree' => TRUE,
'#title' => $this->t('Blazy JS settings'),
'#description' => $this->t('The following are JS related settings.'),
];
$form['blazy']['loadInvisible'] = [
'#type' => 'checkbox',
'#title' => $this->t('Load invisible'),
'#default_value' => $config->get('blazy.loadInvisible'),
'#description' => $this->t('Set to true if you want to load invisible (hidden) elements.'),
];
$form['blazy']['offset'] = [
'#type' => 'textfield',
'#title' => $this->t('Offset'),
'#default_value' => $config->get('blazy.offset'),
'#description' => $this->t("The offset controls how early you want the elements to be loaded before they're visible. Default is 100, so 100px before an element is visible it'll start loading."),
'#field_suffix' => 'px',
'#maxlength' => 5,
'#size' => 10,
];
$form['blazy']['saveViewportOffsetDelay'] = [
'#type' => 'textfield',
'#title' => $this->t('Save viewport offset delay'),
'#default_value' => $config->get('blazy.saveViewportOffsetDelay'),
'#description' => $this->t('Delay for how often it should call the saveViewportOffset function on resize. Default is 50ms.'),
'#field_suffix' => 'ms',
'#maxlength' => 5,
'#size' => 10,
];
return parent::buildForm($form, $form_state);
}
/**
* Implements \Drupal\Core\Form\FormInterface::submitForm().
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$this->configFactory->getEditable('blazy.settings')
->set('admin_css', $form_state->getValue('admin_css'))
->set('responsive_image', $form_state->getValue('responsive_image'))
->set('one_pixel', $form_state->getValue('one_pixel'))
->set('blazy.loadInvisible', $form_state->getValue(['blazy', 'loadInvisible']))
->set('blazy.offset', $form_state->getValue(['blazy', 'offset']))
->set('blazy.saveViewportOffsetDelay', $form_state->getValue(['blazy', 'saveViewportOffsetDelay']))
->save();
// Invalidate the library discovery cache to update the responsive image.
\Drupal::service('library.discovery')->clearCachedDefinitions();
drupal_set_message($this->t('Be sure to clear the cache if trouble to see the updated settings', [':clear_cache' => Url::fromRoute('system.performance_settings')->toString()]));
parent::submitForm($form, $form_state);
}
}