form_options_attributes.module in Form Options Attributes 8

Form options attributes module.

File

form_options_attributes.module

<?php

/**
 * @file
 * Form options attributes module.
 */
use Drupal\Core\Template\Attribute;
use Drupal\Core\Render\Element\RenderElement;
use Drupal\Core\Render\Element;

/**
 * Implements hook_theme().
 */
function form_options_attributes_theme() {
  return [
    'form_options_attributes__select__options_attributes' => [
      'render element' => 'elements',
      'base hook' => 'select',
    ],
  ];
}

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 */
function form_options_attributes_theme_suggestions_select_alter(array &$suggestions, array $variables) {
  if (!empty($variables['element']['#options_attributes'])) {
    array_push($suggestions, 'form_options_attributes__select__options_attributes');
  }
}

/**
 * Implements hook_element_info_alter().
 */
function form_options_attributes_element_info_alter(array &$info) {
  $info['checkboxes']['#process'][] = 'form_options_attributes_form_process_option_attributes';
  $info['radios']['#process'][] = 'form_options_attributes_form_process_option_attributes';
}

/**
 * Prepares variables for select element templates.
 */
function form_options_attributes_preprocess_form_options_attributes__select__options_attributes(&$variables) {
  $element = $variables['element'];
  Element::setAttributes($element, [
    'id',
    'name',
    'size',
  ]);
  RenderElement::setAttributes($element, [
    'form-select',
  ]);
  $variables['attributes'] = $element['#attributes'];
  $variables['options'] = form_select_options($element);
  foreach ($element['#options'] as $key => $option) {
    if (is_array($option)) {

      // This option in an opt group.
      foreach ($option as $sub_key => $sub_option) {
        if (!empty($element['#options_attributes'][$key][$sub_key])) {
          $attributes = $element['#options_attributes'][$key][$sub_key];
          $variables['options_attributes'][$key][$sub_key] = new Attribute($attributes);
        }
      }
    }
    elseif (!empty($element['#options_attributes'][$key])) {

      // This is a normal option with attributes set.
      $attributes = $element['#options_attributes'][$key];
      $variables['options_attributes'][$key] = new Attribute($attributes);
    }
  }
}

/**
 * Processes a checkboxes or radios form element to add options_attributes
 * @param array $element
 * @return array
 */
function form_options_attributes_form_process_option_attributes($element) {
  foreach (Element::children($element) as $key) {
    if (!empty($element['#options_attributes'][$key]) && is_array($element['#options_attributes'][$key])) {
      if (!empty($element[$key]['#attributes'][$key]) && is_array($element[$key]['#attributes'][$key])) {
        $element[$key]['#attributes'] = array_merge($element[$key]['#attributes'], $element['#options_attributes'][$key]);
      }
      else {
        $element[$key]['#attributes'] = $element['#options_attributes'][$key];
      }
    }
  }
  return $element;
}

Functions

Name	Description
form_options_attributes_element_info_alter	Implements hook_element_info_alter().
form_options_attributes_form_process_option_attributes	Processes a checkboxes or radios form element to add options_attributes
form_options_attributes_preprocess_form_options_attributes__select__options_attributes	Prepares variables for select element templates.
form_options_attributes_theme	Implements hook_theme().
form_options_attributes_theme_suggestions_select_alter	Implements hook_theme_suggestions_HOOK_alter().