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58 lines
2.3 KiB
58 lines
2.3 KiB
1 year ago
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{#
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/**
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* @file
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* Theme override to navigate books.
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*
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* Presented under nodes that are a part of book outlines.
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*
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* Available variables:
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* - tree: The immediate children of the current node rendered as an unordered
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* list.
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* - current_depth: Depth of the current node within the book outline. Provided
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* for context.
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* - prev_url: URL to the previous node.
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* - prev_title: Title of the previous node.
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* - parent_url: URL to the parent node.
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* - parent_title: Title of the parent node. Not printed by default. Provided
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* as an option.
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* - next_url: URL to the next node.
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* - next_title: Title of the next node.
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* - has_links: Flags TRUE whenever the previous, parent or next data has a
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* value.
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* - book_id: The book ID of the current outline being viewed. Same as the node
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* ID containing the entire outline. Provided for context.
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* - book_url: The book/node URL of the current outline being viewed. Provided
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* as an option. Not used by default.
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* - book_title: The book/node title of the current outline being viewed.
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*
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* @see template_preprocess_book_navigation()
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* @see olivera_preprocess_book_navigation()
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*/
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#}
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{{ attach_library('olivera/book') }}
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{% if tree or has_links %}
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<nav id="book-navigation-{{ book_id }}" class="book-navigation" role="navigation" aria-labelledby="book-label-{{ book_id }}">
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{{ tree }}
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{% if has_links %}
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<h2 class="visually-hidden" id="book-label-{{ book_id }}">{{ 'Book traversal links for'|t }} {{ book_title }}</h2>
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<ul class="book-pager">
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{% if prev_url %}
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<li class="book-pager__item book-pager__item--previous">
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<a class="book-pager__link book-pager__link--previous" href="{{ prev_url }}" rel="prev" title="{{ 'Go to previous page'|t }}">{{ prev_title }}</a>
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</li>
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{% endif %}
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{% if parent_url %}
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<li class="book-pager__item book-pager__item--center">
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<a class="book-pager__link book-pager__link--center" href="{{ parent_url }}" title="{{ 'Go to parent page'|t }}">{{ 'Up'|t }}</a>
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</li>
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{% endif %}
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{% if next_url %}
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<li class="book-pager__item book-pager__item--next">
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<a class="book-pager__link book-pager__link--next" href="{{ next_url }}" rel="next" title="{{ 'Go to next page'|t }}">{{ next_title }}</a>
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</li>
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{% endif %}
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</ul>
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{% endif %}
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</nav>
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{% endif %}
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