block_styles.module in Block Styles 2.x

File

block_styles.module

<?php

use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_theme_suggestions_HOOK_alter() for block templates.
 */
function block_styles_theme_suggestions_block_alter(array &$suggestions, array $variables) {
  if (isset($variables['elements']['#id'])) {
    $style = _block_styles_get_style($variables['elements']['#id']);
    if (isset($style['theme'])) {
      $suggestions[] = $style['theme'];
    }
  }
}

/**
 * Implements hook_preprocess_block() for blocks.
 */
function block_styles_preprocess_block(&$variables) {
  if (isset($variables['elements']['#id'])) {
    $style = _block_styles_get_style($variables['elements']['#id']);
    if (isset($style['classes'])) {
      $variables['attributes']['class'][] = $style['classes'];
    }
    if (isset($style['text'])) {
      $variables['configuration']['button_text'] = t($style['text']);
    }
    else {
      $variables['configuration']['button_text'] = $variables['configuration']['label'];
    }
  }
}

/**
 * Implements hook_form_alter() adding administration for block layouts.
 */
function block_styles_form_block_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  $entity = $form_state
    ->getFormObject()
    ->getEntity();
  if (is_null($entity
    ->id())) {
    return;
  }
  $style = _block_styles_get_style($entity
    ->id());
  $styles_manager = \Drupal\styles_api\Style::stylePluginManager();
  $styles = [];
  $plugin_definitions = $styles_manager
    ->getDefinitions();
  foreach ($plugin_definitions as $plugin_id => $plugin_definition) {
    if ($plugin_definition['type'] == 'block') {
      $styles[$plugin_id] = $plugin_definition['label'];
    }
  }
  $disabled = TRUE;
  $type = 'hidden';
  $attributes = [
    'style' => [
      'display' => 'none',
    ],
  ];
  $results = $form_state
    ->getValues();
  if (isset($results['block_styles']['theme'])) {
    if ($plugin_definitions[$results['block_styles']['theme']]['extras']['label']) {
      $disabled = FALSE;
      $type = 'textfield';
    }
  }
  else {
    if (!empty($plugin_definitions[$style['theme']]['extras']['label'])) {
      $disabled = FALSE;
      $type = 'textfield';
    }
  }

  // Block styles
  $form['block_styles'] = [
    '#type' => 'fieldset',
    '#title' => t('Block Styles Template'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  ];
  $form['block_styles']['theme'] = [
    '#type' => 'select',
    '#title' => t('Select block style'),
    '#default_value' => $style['theme'],
    '#empty_option' => t('None'),
    '#options' => $styles,
    '#description' => t('The selected layout template will be applied to block wrapper, replacing block.html.twig'),
    '#ajax' => [
      // When 'event' occurs, Drupal will perform an ajax request in the
      // background. Usually the default value is sufficient (eg. change for
      // select elements), but valid values include any jQuery event,
      // most notably 'mousedown', 'blur', and 'submit'.
      // 'event' => 'change',
      'callback' => '_block_styles_theme_callback',
      'wrapper' => 'text-replace',
    ],
  ];
  $form['block_styles']['text'] = [
    '#type' => $type,
    '#title' => t('Text for button label'),
    '#default_value' => $style['text'],
    '#description' => t('Text to use on the button that show the block content.'),
    '#size' => 60,
    '#maxlength' => 64,
    '#prefix' => '<div id="text-replace">',
    '#suffix' => '</div>',
    '#disabled' => $disabled,
  ];
  $form['block_styles']['classes'] = [
    '#type' => 'textfield',
    '#title' => t('Add classes to block wrapper'),
    '#default_value' => $style['classes'],
    '#description' => t('Add classes for block wrapper, separated by spaces.'),
    '#size' => 60,
    '#maxlength' => 128,
  ];
  $form['actions']['submit']['#submit'][] = '_block_styles_form_submit';
}
function _block_styles_theme_callback($form, $form_state) {
  return $form['block_styles']['text'];
}
function _block_styles_form_submit(array &$form, FormStateInterface $form_state) {
  $results = $form_state
    ->getValues();
  $entity = $form_state
    ->getFormObject()
    ->getEntity();
  $block_layout_storage = \Drupal::entityTypeManager()
    ->getStorage('block_styles');
  $block_layout = $block_layout_storage
    ->load($entity
    ->id());
  if (isset($block_layout)) {
    $block_layout
      ->set('theme', $results['block_styles']['theme']);
    $block_layout
      ->set('classes', $results['block_styles']['classes']);
    $block_layout
      ->set('text', $results['block_styles']['text']);
  }
  else {
    $block_layout = \Drupal::entityTypeManager()
      ->getStorage('block_styles')
      ->create([
      'id' => $entity
        ->id(),
      'theme' => $results['block_styles']['theme'],
      'classes' => $results['block_styles']['classes'],
      'text' => $results['block_styles']['text'],
    ]);
  }
  $status = $block_layout
    ->save();
  if ($status) {
    \Drupal::logger('block_styles')
      ->notice('Block style template was @type, for block %title to theme %theme', [
      '@type' => $status == 1 ? 'Saved' : 'Updated',
      '%title' => $entity
        ->id(),
      '%theme' => $results['block_styles']['theme'],
    ]);
  }
}
function _block_styles_get_style($block_id) {
  if (!$block_id) {
    return false;
  }
  $block_styles_storage = \Drupal::entityTypeManager()
    ->getStorage('block_styles');
  $block = $block_styles_storage
    ->load($block_id);
  if (isset($block)) {
    $styles_manager = \Drupal\styles_api\Style::stylePluginManager();
    $plugin_definitions = $styles_manager
      ->getDefinitions();
    $block_theme = $block
      ->get('theme');
    if (!empty($plugin_definitions[$block_theme])) {
      $provider_type = $plugin_definitions[$block_theme]['provider_type'];
      $provider = $plugin_definitions[$block_theme]['provider'];
      if ($provider_type == 'theme') {
        $theme = \Drupal::theme()
          ->getActiveTheme()
          ->getName();
        if ($theme != $provider) {
          return false;
        }
      }
    }
    return $block
      ->getStyle();
  }
}

Functions

Name	Description
block_styles_form_block_form_alter	Implements hook_form_alter() adding administration for block layouts.
block_styles_preprocess_block	Implements hook_preprocess_block() for blocks.
block_styles_theme_suggestions_block_alter	Implements hook_theme_suggestions_HOOK_alter() for block templates.
_block_styles_form_submit
_block_styles_get_style
_block_styles_theme_callback