--- /dev/null
+<?php
+
+/**
+ * @file
+ * Hook implementations for Layout Plugin module.
+ */
+
+use \Drupal\Core\Routing\RouteMatchInterface;
+use \Drupal\layout_plugin\Layout;
+
+/**
+ * Implements hook_help();
+ */
+function layout_plugin_help($route_name, RouteMatchInterface $route_match) {
+ switch ($route_name) {
+ case 'help.page.layout_plugin':
+ $output = '';
+ $output .= '<h3>' . t('About') . '</h3>';
+ $output .= '<p>' . t('Layout Plugin allows modules or themes to register layouts, and for other modules to list the available layouts and render them. For more information, see the <a href=":layout-plugin-documentation">online documentation for the Layout Plugin module</a>.', [':layout-plugin-documentation' => 'https://www.drupal.org/node/2619128']) . '</p>';
+ $output .= '<h3>' . t('Uses') . '</h3>';
+ $output .= '<p>' . t('This is an API module which serves as the plugin manager for layouts. API modules provide a common set of routines, protocols, and tools developers use for building specific features into modules for your site. See the Layout Plugin project page for a complete listing of <a href=":layout_plugin">Modules that use Layout Plugin</a>.', [':layout_plugin' => 'https://www.drupal.org/project/layout_plugin']) . '</p>';
+ $output .= '<p>' . t('<em>Registering</em> a Layout Plugin - There are several ways to register your layout. For more information of the simplest, most common case and then building up to some of the more advanced techniques, see <a href=":register">How to register layouts with Layout Plugin</a>.', [':layout_plugin' => 'https://www.drupal.org/node/2578731']) . '</p>';
+ $output .= '<p>' . t('<em>Rendering</em> a Layout Plugin - To render a layout plugin you first get the layout plugin manager, then list available layouts and instantiate the layout plugin. Rendering is then possible and a configuration display for showing and storing layouts is made available. For more information on rendering layouts, see <a href=":render">How to render layouts using Layout Plugin</a>.', [':layout_plugin' => 'https://www.drupal.org/node/2619168']) . '</p>';
+ return $output;
+ }
+}
+
+/**
+ * Implements hook_theme().
+ */
+function layout_plugin_theme() {
+ return Layout::layoutPluginManager()->getThemeImplementations();
+}
+
+/**
+ * Implements hook_theme_registry_alter().
+ */
+function layout_plugin_theme_registry_alter(&$theme_registry) {
+ Layout::layoutPluginManager()->alterThemeImplementations($theme_registry);
+}
+
+/**
+ * Implements hook_library_info_build().
+ */
+function layout_plugin_library_info_build() {
+ return Layout::layoutPluginManager()->getLibraryInfo();
+}
+
+/**
+ * Prepares variables for layout templates.
+ *
+ * We name it with an underscore so if there is ever a template called 'layout'
+ * that this preprocess function doesn't automatically get picked up.
+ *
+ * @param array &$variables
+ * An associative array containing:
+ * - element: An associative array containing the properties of the element.
+ * Properties used: #settings, #layout
+ */
+function _layout_plugin_preprocess_layout(&$variables) {
+ $content = $variables['content'];
+ $variables['settings'] = $content['#settings'] ?: [];
+ $variables['layout'] = $content['#layout'] ?: [];
+}