--- /dev/null
+<?php
+
+/**
+ * @file
+ * Contains bootstrap_layouts.module.
+ */
+
+use Drupal\bootstrap_layouts\BootstrapLayout;
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Render\Element;
+use Drupal\Core\Template\Attribute;
+use Drupal\layout_plugin\Layout;
+
+/**
+ * Implements hook_theme_registry_alter().
+ */
+function bootstrap_layouts_theme_registry_alter(&$theme_registry) {
+ // Find all Bootstrap Layouts.
+ $layouts = Layout::layoutPluginManager()->getDefinitions();
+ $layout_theme_hooks = [];
+ foreach ($layouts as $info) {
+ if ($info['class'] === '\Drupal\bootstrap_layouts\Plugin\Layout\BootstrapLayoutsBase') {
+ $layout_theme_hooks[] = $info['theme'];
+ }
+ }
+
+ // Add a special internal preprocess function.
+ foreach ($theme_registry as $theme_hook => $info) {
+ if (in_array($theme_hook, $layout_theme_hooks) || (!empty($info['base hook']) && in_array($info['base hook'], $layout_theme_hooks))) {
+ $theme_registry[$theme_hook]['preprocess functions'][] = '_bootstrap_layouts_preprocess_layout';
+ }
+ }
+}
+
+/**
+ * Parses an attribute string saved in the UI.
+ *
+ * @param string $string
+ * The attribute string to parse.
+ * @param array $tokens
+ * An associative array of token data to use.
+ *
+ * @return array
+ * A parsed attributes array.
+ */
+function _bootstrap_layouts_parse_attributes($string = NULL, array $tokens = []) {
+ static $token;
+ if (!isset($token)) {
+ /** @var \Drupal\Core\Utility\Token $token */
+ $token = \Drupal::service('token');
+ }
+ $attributes = [];
+ if (!empty($string)) {
+ $parts = explode(',', $string);
+ foreach ($parts as $attribute) {
+ if (strpos($attribute, '|') !== FALSE) {
+ list($key, $value) = explode('|', $token->replace($attribute, $tokens, ['clear' => TRUE]));
+ $attributes[$key] = $value;
+ }
+ }
+ }
+ return $attributes;
+}
+
+/**
+ * Internal preprocess callback.
+ *
+ * This is used to determine standardize variables to use in Bootstrap Layouts
+ * templates based on whatever implementation is used (i.e. Display Suite or
+ * Panels, etc.).
+ *
+ * @param array $variables
+ * Variables array, passed by reference.
+ */
+function _bootstrap_layouts_preprocess_layout(array &$variables) {
+ // Utilize the BootstrapLayout utility class to normalize DX readability here.
+ $layout = new BootstrapLayout($variables['layout']['id'], [], $variables['settings']);
+
+
+ // Determine the entity, entity type and bundle.
+ /** @var \Drupal\Core\Entity\EntityInterface $entity */
+ $entity = isset($variables['content']['#entity']) ? $variables['content']['#entity'] : FALSE;
+ $entity_type = isset($variables['content']['#entity_type']) ? $variables['content']['#entity_type'] : FALSE;
+ $bundle = isset($variables['content']['#bundle']) ? $variables['content']['#bundle'] : FALSE;
+ $view_mode = isset($variables['content']['#view_mode']) ? $variables['content']['#view_mode'] : FALSE;
+
+ $tokens = [];
+ if ($entity_type && $entity) {
+ $tokens[$entity_type] = $entity;
+
+ // Copy entity to top level to improve theme experience.
+ $variables[$entity_type] = $entity;
+ }
+
+ // Add a layout wrapper and its attributes.
+ $variables['wrapper'] = $layout->getSetting('layout.wrapper', 'div');
+ $layout_attributes = isset($variables['attributes']) ? $variables['attributes'] : [];
+ $layout_attributes = NestedArray::mergeDeep(_bootstrap_layouts_parse_attributes($layout->getSetting('layout.attributes'), $tokens), $layout_attributes);
+
+ $attributes = new Attribute($layout_attributes);
+ $attributes->addClass(array_keys($layout->getSetting('layout.classes', [])));
+ if ($layout->getSetting('layout.add_layout_class')) {
+ $attributes->addClass(Html::cleanCssIdentifier($layout->getId()));
+ }
+
+ // Unfortunately since Display Suite doesn't abstract this bit of code, it
+ // must be duplicated in this module to support it from the UI.
+ if ($entity_type && isset($variables['content']['#ds_configuration'])) {
+ // Add theming-classes to template.
+ $entity_classes = !empty($variables['content']['#ds_configuration']['layout']['entity_classes']) ? $variables['content']['#ds_configuration']['layout']['entity_classes'] : 'old_view_mode';
+ if ($entity_classes !== 'no_classes') {
+ if ($entity_classes === 'all_classes') {
+ $entity_type_class = Html::cleanCssIdentifier($entity_type);
+ $entity_classes = [$entity_type_class];
+ if ($bundle) {
+ $entity_classes[] = "$entity_type_class--type-" . Html::cleanCssIdentifier($bundle);
+ }
+ if ($view_mode) {
+ $entity_classes[] = "$entity_type_class--view-mode-" . Html::cleanCssIdentifier($view_mode);
+ }
+ $attributes->addClass($entity_classes);
+ }
+ // Add (old style, non cleaned) view-mode-{name} to classes.
+ elseif ($entity_classes === 'old_view_mode' && $view_mode && !$attributes->hasClass("view-mode-$view_mode")) {
+ $attributes->addClass("view-mode-$view_mode");
+ }
+ }
+
+ // Let other modules know we have rendered.
+ $variables['rendered_by_ds'] = TRUE;
+
+ // Let other modules alter the ds array before rendering.
+ $context = [
+ 'entity' => $entity,
+ 'entity_type' => $entity_type,
+ 'bundle' => $bundle,
+ 'view_mode' => $view_mode,
+ ];
+ \Drupal::moduleHandler()->alter('ds_pre_render', $variables['content'], $context, $variables);
+ }
+
+ // Set the attributes variable.
+ $variables['attributes'] = $attributes;
+
+ // Create region variables based on the layout settings.
+ foreach ($layout->getSetting('regions') as $region => $region_settings) {
+ $region_attributes = new Attribute(_bootstrap_layouts_parse_attributes($region_settings['attributes'], $tokens));
+ $region_attributes->addClass(array_keys($region_settings['classes']));
+ if (!empty($region_settings['add_region_classes'])) {
+ $region_attributes->addClass(['bs-region', Html::cleanCssIdentifier("bs-region--$region")]);
+ }
+ unset($region_settings['classes']);
+ $region_settings['attributes'] = $region_attributes;
+ $region_settings['content'] = isset($variables['content'][$region]) && !Element::isEmpty($variables['content'][$region]) ? $variables['content'][$region] : NULL;
+ $variables[$region] = $region_settings;
+ }
+}