material_base.theme

<?php

/**
 * @file
 * Functions to support theming in the Material base theme.
 */

use Drupal\Core\Template\Attribute;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_preprocess_HOOK() for HTML document templates.
 *
 * Adds body classes if certain regions have content.
 */
function material_base_preprocess_html(&$variables) {
  // Add information about the number of sidebars.
  if (!empty($variables['page']['sidebar_first']) && !empty($variables['page']['sidebar_second'])) {
    $variables['attributes']['class'][] = 'two-sidebars';
  }
  elseif (!empty($variables['page']['sidebar_first'])) {
    $variables['attributes']['class'][] = 'one-sidebar';
    $variables['attributes']['class'][] = 'sidebar-first';
  }
  elseif (!empty($variables['page']['sidebar_second'])) {
    $variables['attributes']['class'][] = 'one-sidebar';
    $variables['attributes']['class'][] = 'sidebar-second';
  }
  else {
    $variables['attributes']['class'][] = 'no-sidebars';
  }
  // Add class for admin-toolbar
  if (\Drupal::moduleHandler()->moduleExists('admin_toolbar')) {
    $variables['attributes']['class'][] = 'admin-toolbar';
  }

}

/**
 * Implements hook_form_alter().
 */
function material_base_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  switch ($form_id) {
    case 'user_login_form': 
      $form['#attributes']['class'][] = 'card card-form';
      $form['links'] = Null;
      $form['user_icon']['#markup'] = '<div class="user-icon text-align-center"><i class="material-icons text-disabled">lock</i></div>';
      $form['user_icon']['#weight'] = -15;
      $form['name']['#title'] = Null;
      $form['name']['#attributes']['placeholder'] = t('Login');
      $form['name']['#description'] = Null;
      $form['pass']['#title'] = Null;
      $form['pass']['#attributes']['placeholder'] = t('Password');
      $form['pass']['#description'] = Null;
      $form['actions']['#attributes']['class'][] = 'card-item card-actions divider-top';
      $form['actions']['submit']['#attributes']['class'][] = 'btn-accent';
      $form['actions']['request_pass']['#markup'] = '<a class="btn pull-right" href="/user/password">' . t('Reset your password') . '</a>';
      break;
    case 'user_pass':
      $form['#attributes']['class'][] = 'card card-form';
      $form['user_icon']['#markup'] = '<div class="user-icon text-align-center"><i class="material-icons text-disabled">vpn_key</i></div>';
      $form['user_icon']['#weight'] = -15;
      $form['mail']['#weight'] = -10;
      $form['name']['#title'] = Null;
      $form['name']['#attributes']['placeholder'] = t('Login or E-mail');
      $form['actions']['#attributes']['class'][] = 'card-item card-actions divider-top';
      $form['actions']['submit']['#attributes']['class'][] = 'btn-accent';
      break;
    case 'user_register_form':
      $form['#attributes']['class'][] = 'card card-form';
      $form['user_icon']['#markup'] = '<div class="user-icon text-align-center"><i class="material-icons text-disabled">account_circle</i></div>';
      $form['user_icon']['#weight'] = -15;
      $form['account']['name']['#title'] = Null;
      $form['account']['name']['#attributes']['placeholder'] = t('Login');
      $form['account']['mail']['#title'] = Null;
      $form['account']['mail']['#attributes']['placeholder'] = t('E-mail');
      $form['actions']['#attributes']['class'][] = 'card-item card-actions divider-top';
      $form['actions']['submit']['#attributes']['class'][] = 'btn-accent';
      break;
    case 'search_block_form':
      $form['keys']['#attributes']['placeholder'] = t('Search');
      $form['keys']['#wrapper_attributes']['class'][] = 'icon-left';
      $form['keys']['#wrapper_attributes']['data-icon'] = 'search';
      $form['actions']['submit']['#attributes']['class'][] = 'hidden';
      break;
  }
}

/**
 * Implements hook_form_views_exposed_form_alter().
 */
function material_base_form_views_exposed_form_alter(&$form, FormStateInterface $form_state) {
  // 'keys' should be changed if id was changed in interface
  if (isset($form['keys'])) {
    $form['#info']['filter-keys']['label'] = Null;
    $form['keys']['#attributes']['placeholder'] = t('Search');
    $form['keys']['#wrapper_attributes']['class'][] = 'icon-left';
    $form['keys']['#wrapper_attributes']['data-icon'] = 'search';
    $form['actions']['submit']['#attributes']['class'][] = 'hidden';
  }
}