{#-
  Override of Zensical 0.0.37 partials/nav-item.html with two changes:
  sections without an index page take their icon from extra.nav_icons in zensical.toml,
  and only a section's first child can serve as its index page.
-#}
{% macro render_status(nav_item, type) %}
  {% set class = "md-status md-status--" ~ type %}
  {% if config.extra.status and config.extra.status[type] %}
    <span class="{{ class }}" title="{{ config.extra.status[type] }}">
    </span>
  {% else %}
    <span class="{{ class }}"></span>
  {% endif %}
{% endmacro %}
{% macro render_title(nav_item) %}
  {% if nav_item.typeset %}
    <span class="md-typeset">
      {{ nav_item.typeset.title }}
    </span>
  {% else %}
    {{ nav_item.title }}
  {% endif %}
{% endmacro %}
{% macro render_content(nav_item, ref) %}
  {% set ref = ref or nav_item %}
  {% if nav_item.meta and nav_item.meta.icon %}
    {% include ".icons/" ~ nav_item.meta.icon ~ ".svg" %}
  {% elif nav_item.children and config.extra.nav_icons and nav_item.title in config.extra.nav_icons %}
    {% include ".icons/" ~ config.extra.nav_icons[nav_item.title] ~ ".svg" %}
  {% endif %}
  <span class="md-ellipsis">
    {{ render_title(ref) }}
    {% if nav_item.meta and nav_item.meta.subtitle %}
      <br>
      <small>{{ nav_item.meta.subtitle }}</small>
    {% endif %}
  </span>
  {% if nav_item.meta and nav_item.encrypted %}
    {{ render_status(nav_item, "encrypted") }}
  {% endif %}
  {% if nav_item.meta and nav_item.meta.status %}
    {{ render_status(nav_item, nav_item.meta.status) }}
  {% endif %}
{% endmacro %}
{% macro render_pruned(nav_item, ref) %}
  {% set ref = ref or nav_item %}
  {% set first = nav_item.children | first %}
  {% if first and first.children %}
    {{ render_pruned(first, ref) }}
  {% else %}
    <a href="{{ first.url | url }}" class="md-nav__link">
      {{ render_content(ref) }}
      {% if nav_item.children | length > 0 %}
        <span class="md-nav__icon md-icon"></span>
      {% endif %}
    </a>
  {% endif %}
{% endmacro %}
{% macro render(nav_item, path, level, parent) %}
  {% set class = "md-nav__item" %}
  {% if nav_item.active %}
    {% set class = class ~ " md-nav__item--active" %}
  {% endif %}
  {% if nav_item.pages %}
    {% if page in nav_item.pages %}
      {% set nav_item = page %}
    {% endif %}
  {% endif %}
  {% if nav_item.children %}
    {% set _ = namespace(index = none) %}
    {% if "navigation.indexes" in features %}
      {% set first = nav_item.children | first %}
      {% if first.is_index %}
        {% set _.index = first %}
      {% endif %}
    {% endif %}
    {% set index = _.index %}
    {% if "navigation.tabs" in features %}
      {% if level == 1 and nav_item.active %}
        {% set class = class ~ " md-nav__item--section" %}
        {% set is_section = true %}
      {% endif %}
      {% if "navigation.sections" in features %}
        {% if level == 2 and parent.active %}
          {% set class = class ~ " md-nav__item--section" %}
          {% set is_section = true %}
        {% endif %}
      {% endif %}
    {% elif "navigation.sections" in features %}
      {% if level == 1 %}
        {% set class = class ~ " md-nav__item--section" %}
        {% set is_section = true %}
      {% endif %}
    {% endif %}
    {% if "navigation.prune" in features %}
      {% if not is_section and not nav_item.active %}
        {% set class = class ~ " md-nav__item--pruned" %}
        {% set is_pruned = true %}
      {% endif %}
    {% endif %}
    <li class="{{ class }} md-nav__item--nested">
      {% if not is_pruned %}
        {% set checked = "checked" if nav_item.active %}
        {% if "navigation.expand" in features and not checked %}
          {% set indeterminate = "md-toggle--indeterminate" %}
        {% endif %}
        <input class="md-nav__toggle md-toggle {{ indeterminate }}" type="checkbox" id="{{ path }}" {{ checked }}>
        {% if not index %}
          {% set tabindex = "0" if not is_section %}
          <label class="md-nav__link" for="{{ path }}" id="{{ path }}_label" tabindex="{{ tabindex }}">
            {{ render_content(nav_item) }}
            <span class="md-nav__icon md-icon"></span>
          </label>
        {% else %}
          {% set class = "md-nav__link--active" if index.active %}
          <div class="md-nav__link md-nav__container">
            <a href="{{ index.url | url }}" class="md-nav__link {{ class }}">
              {{ render_content(index, nav_item) }}
            </a>
            {% if nav_item.children | length > 1 %}
              {% set tabindex = "0" if not is_section %}
              <label class="md-nav__link {{ class }}" for="{{ path }}" id="{{ path }}_label" tabindex="{{ tabindex }}">
                <span class="md-nav__icon md-icon"></span>
              </label>
            {% endif %}
          </div>
        {% endif %}
        <nav class="md-nav" data-md-level="{{ level }}" aria-labelledby="{{ path }}_label" aria-expanded="{{ nav_item.active | tojson }}">
          <label class="md-nav__title" for="{{ path }}">
            <span class="md-nav__icon md-icon"></span>
            {{ render_title(nav_item) }}
          </label>
          <ul class="md-nav__list" data-md-scrollfix>
            {% for item in nav_item.children %}
              {% if not index or item != index %}
                {{ render(item, path ~ "_" ~ loop.index, level + 1, nav_item) }}
              {% endif %}
            {% endfor %}
          </ul>
        </nav>
      {% else %}
        {{ render_pruned(nav_item, index) }}
      {% endif %}
    </li>
  {% elif nav_item.active %}
    <li class="{{ class }}">
      {% set toc = page.toc %}
      {% if config.theme.variant == "classic" %}
        <input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
      {% endif %}
      {% set first = toc | first %}
      {% if first and first.level == 1 %}
        {% set toc = first.children %}
      {% endif %}
      {% if toc %}
        <label class="md-nav__link md-nav__link--active" for="__toc">
          {{ render_content(nav_item) }}
          <span class="md-nav__icon md-icon"></span>
        </label>
      {% endif %}
      <a href="{{ nav_item.url | url }}" class="md-nav__link md-nav__link--active">
        {{ render_content(nav_item) }}
      </a>
      {% if toc %}
        {% include "partials/toc.html" %}
      {% endif %}
    </li>
  {% else %}
    <li class="{{ class }}">
      <a href="{{ nav_item.url | url }}" class="md-nav__link">
        {{ render_content(nav_item) }}
      </a>
    </li>
  {% endif %}
{% endmacro %}