<?php

/**
 * @file
 * Manages page layouts for content presentation.
 */

/**
 * Get the layout plugin manager instance.
 *
 * @return Drupal\layout\Plugin\Type\LayoutManager
 *   The layout plugin manager instance.
 */
function layout_manager() {
  return drupal_container()->get('plugin.manager.layout');
}

/**
 * Implements hook_theme().
 *
 * Expose all layouts as theme items, so themes can override layout markup.
 */
function layout_theme($existing, $type, $theme, $path) {
  $items = array();
  foreach (layout_manager()->getDefinitions() as $name => $layout) {
    $items[$layout['theme']] = array(
      'variables' => array('content' => NULL),
      'path' => $layout['path'],
      'template' => $layout['template'],
    );
  }
  return $items;
}