1{# 2/** 3 * @file 4 * Theme override to navigate books. 5 * 6 * Presented under nodes that are a part of book outlines. 7 * 8 * Available variables: 9 * - tree: The immediate children of the current node rendered as an unordered 10 * list. 11 * - current_depth: Depth of the current node within the book outline. Provided 12 * for context. 13 * - prev_url: URL to the previous node. 14 * - prev_title: Title of the previous node. 15 * - parent_url: URL to the parent node. 16 * - parent_title: Title of the parent node. Not printed by default. Provided 17 * as an option. 18 * - next_url: URL to the next node. 19 * - next_title: Title of the next node. 20 * - has_links: Flags TRUE whenever the previous, parent or next data has a 21 * value. 22 * - book_id: The book ID of the current outline being viewed. Same as the node 23 * ID containing the entire outline. Provided for context. 24 * - book_url: The book/node URL of the current outline being viewed. Provided 25 * as an option. Not used by default. 26 * - book_title: The book/node title of the current outline being viewed. 27 * 28 * @see template_preprocess_book_navigation() 29 */ 30#} 31{% if tree or has_links %} 32 <nav role="navigation" aria-labelledby="book-label-{{ book_id }}"> 33 {{ tree }} 34 {% if has_links %} 35 <h2>{{ 'Book traversal links for'|t }} {{ book_title }}</h2> 36 <ul> 37 {% if prev_url %} 38 <li> 39 <a href="{{ prev_url }}" rel="prev" title="{{ 'Go to previous page'|t }}"><b>{{ '‹'|t }}</b> {{ prev_title }}</a> 40 </li> 41 {% endif %} 42 {% if parent_url %} 43 <li> 44 <a href="{{ parent_url }}" title="{{ 'Go to parent page'|t }}">{{ 'Up'|t }}</a> 45 </li> 46 {% endif %} 47 {% if next_url %} 48 <li> 49 <a href="{{ next_url }}" rel="next" title="{{ 'Go to next page'|t }}">{{ next_title }} <b>{{ '›'|t }}</b></a> 50 </li> 51 {% endif %} 52 </ul> 53 {% endif %} 54 </nav> 55{% endif %} 56