{# The whole manual on one page: the chapters listed in front matter, in
   order. Each chapter's ids get the chapter as a prefix, #markdown-tables,
   so they stay unique; links between chapters become links on this page;
   the chapter's headings move one level down, under the chapter title. #}
{% extends "base.html" %}

{% block code_css %}<style>{% include "code.css" %}</style>{% endblock %}

{% block main %}
{% set all = namespace(chapters=[]) %}
{% for c in page.chapters %}{% set all.chapters = all.chapters + pages("/" ~ c) %}{% endfor %}

<article>
  <h1>{{ page.title }}</h1>
  {{ page.content }}

  <nav class="toc" aria-label="Contents">
  <ol>
    {% for p in all.chapters %}
    {% set c = page.chapters[loop.index0] %}
    <li>
      <a href="#{{ c }}">{{ p.title }}</a>
      {% if p.toc %}
      <ul>
        {% for e in p.toc %}<li><a href="#{{ c }}-{{ e.id }}">{{ e.title }}</a></li>{% endfor %}
      </ul>
      {% endif %}
    </li>
    {% endfor %}
  </ol>
  </nav>

  {% for p in all.chapters %}
  {% set c = page.chapters[loop.index0] %}
  {% set ns = namespace(h=p.content) %}
  {# replace escapes plain text it puts into HTML: mark the new text safe #}
  {% set ns.h = ns.h | replace('id="', ('id="' ~ c ~ '-') | safe) | replace('href="#', ('href="#' ~ c ~ '-') | safe) %}
  {% set ns.h = ns.h | replace('href="#' ~ c ~ '-"', 'href="#"' | safe) %}
  {# Links to other chapters #}
  {% for o in page.chapters %}
  {% set ns.h = ns.h | replace('href="/' ~ o ~ '/#', ('href="#' ~ o ~ '-') | safe) | replace('href="/' ~ o ~ '/"', ('href="#' ~ o ~ '"') | safe) %}
  {% endfor %}
  {# Headings one level down #}
  {% for n in [4, 3, 2] %}
  {% set ns.h = ns.h | replace('<h' ~ n, ('<h' ~ (n + 1)) | safe) | replace('</h' ~ n ~ '>', ('</h' ~ (n + 1) ~ '>') | safe) %}
  {% endfor %}
  <section id="{{ c }}">
    <h2>{{ loop.index }}. {{ p.title }}</h2>
    {{ ns.h }}
  </section>
  {% endfor %}
</article>
{% endblock %}