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{% macro toc(page, header, language_strings="") %}
{%- set toc_levels = page.extra.toc_levels | default(value=3) -%}
{% if page.extra.toc_ignore_pattern %}
{%- set toc_ignore_pattern = page.extra.toc_ignore_pattern -%}
{% endif %}
<div class="toc-container">
{% if header %}
<h3>{{ macros_translate::translate(key="table_of_contents", default="Table of Contents", language_strings=language_strings) }}</h3>
{% endif %}
<ul>
{% for h1 in page.toc %}
{# Only render headers if there's no ignore pattern, or if the header text doesn't match the pattern. #}
{% if not toc_ignore_pattern or not (h1.title is matching(toc_ignore_pattern)) %}
<li><a href="{{ h1.permalink | safe }}">{{ h1.title }}</a>
{% if h1.children and toc_levels > 1 %}
<ul>
{% for h2 in h1.children %}
{% if not toc_ignore_pattern or not (h2.title is matching(toc_ignore_pattern)) %}
<li><a href="{{ h2.permalink | safe }}">{{ h2.title }}</a>
{% if h2.children and toc_levels > 2 %}
<ul>
{% for h3 in h2.children %}
{% if not toc_ignore_pattern or not (h3.title is matching(toc_ignore_pattern)) %}
<li><a href="{{ h3.permalink | safe }}">{{ h3.title }}</a>
{% if h3.children and toc_levels > 3 %}
<ul>
{% for h4 in h3.children %}
{% if not toc_ignore_pattern or not (h4.title is matching(toc_ignore_pattern)) %}
<li><a href="{{ h4.permalink | safe }}">{{ h4.title }}</a></li>
{% endif %}
{% endfor %}
</ul>
{% endif %}
</li>
{% endif %}
{% endfor %}
</ul>
{% endif %}
</li>
{% endif %}
{% endfor %}
</ul>
{% endif %}
</li>
{% endif %}
{% endfor %}
</ul>
</div>
{% endmacro toc %}
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