book-tree.html.twig 1.6 KB

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  1. {#
  2. /**
  3. * @file
  4. * Theme override to display a book tree.
  5. *
  6. * Returns HTML for a wrapper for a book sub-tree.
  7. *
  8. * Available variables:
  9. * - items: A nested list of book items. Each book item contains:
  10. * - attributes: HTML attributes for the book item.
  11. * - below: The book item child items.
  12. * - title: The book link title.
  13. * - url: The book link URL, instance of \Drupal\Core\Url.
  14. * - is_expanded: TRUE if the link has visible children within the current
  15. * book tree.
  16. * - is_collapsed: TRUE if the link has children within the current book tree
  17. * that are not currently visible.
  18. * - in_active_trail: TRUE if the link is in the active trail.
  19. */
  20. #}
  21. {% import _self as book_tree %}
  22. {#
  23. We call a macro which calls itself to render the full tree.
  24. @see http://twig.sensiolabs.org/doc/tags/macro.html
  25. #}
  26. {{ book_tree.book_links(items, attributes, 0) }}
  27. {% macro book_links(items, attributes, menu_level) %}
  28. {% import _self as book_tree %}
  29. {% if items %}
  30. {% if menu_level == 0 %}
  31. <ul{{ attributes.addClass('menu') }}>
  32. {% else %}
  33. <ul class="menu">
  34. {% endif %}
  35. {% for item in items %}
  36. {%
  37. set classes = [
  38. 'menu-item',
  39. item.is_expanded ? 'menu-item--expanded',
  40. item.is_collapsed ? 'menu-item--collapsed',
  41. item.in_active_trail ? 'menu-item--active-trail',
  42. ]
  43. %}
  44. <li{{ item.attributes.addClass(classes) }}>
  45. {{ link(item.title, item.url) }}
  46. {% if item.below %}
  47. {{ book_tree.book_links(item.below, attributes, menu_level + 1) }}
  48. {% endif %}
  49. </li>
  50. {% endfor %}
  51. </ul>
  52. {% endif %}
  53. {% endmacro %}