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Add Table of Contents to EIPs website (#2582)
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This PR adds jekyll-toc to the EIPs website
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ryanio authored Oct 31, 2020
1 parent 897f456 commit fa7bf58
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96 changes: 96 additions & 0 deletions _includes/toc.html
Original file line number Diff line number Diff line change
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{% capture tocWorkspace %}
{% comment %}
Version 1.0.10
https://github.com/allejo/jekyll-toc

"...like all things liquid - where there's a will, and ~36 hours to spare, there's usually a/some way" ~jaybe

Usage:
{% include toc.html html=content sanitize=true class="inline_toc" id="my_toc" h_min=2 h_max=3 %}

Parameters:
* html (string) - the HTML of compiled markdown generated by kramdown in Jekyll

Optional Parameters:
* sanitize (bool) : false - when set to true, the headers will be stripped of any HTML in the TOC
* class (string) : '' - a CSS class assigned to the TOC
* id (string) : '' - an ID to assigned to the TOC
* h_min (int) : 1 - the minimum TOC header level to use; any header lower than this value will be ignored
* h_max (int) : 6 - the maximum TOC header level to use; any header greater than this value will be ignored
* ordered (bool) : false - when set to true, an ordered list will be outputted instead of an unordered list
* item_class (string) : '' - add custom class(es) for each list item; has support for '%level%' placeholder, which is the current heading level
* baseurl (string) : '' - add a base url to the TOC links for when your TOC is on another page than the actual content
* anchor_class (string) : '' - add custom class(es) for each anchor element

Output:
An ordered or unordered list representing the table of contents of a markdown block. This snippet will only
generate the table of contents and will NOT output the markdown given to it
{% endcomment %}

{% capture my_toc %}{% endcapture %}
{% assign orderedList = include.ordered | default: false %}
{% assign minHeader = include.h_min | default: 1 %}
{% assign maxHeader = include.h_max | default: 6 %}
{% assign nodes = include.html | split: '<h' %}
{% assign firstHeader = true %}

{% capture listModifier %}{% if orderedList %}1.{% else %}-{% endif %}{% endcapture %}

{% for node in nodes %}
{% if node == "" %}
{% continue %}
{% endif %}

{% assign headerLevel = node | replace: '"', '' | slice: 0, 1 | times: 1 %}

{% if headerLevel < minHeader or headerLevel > maxHeader %}
{% continue %}
{% endif %}

{% if firstHeader %}
{% assign firstHeader = false %}
{% assign minHeader = headerLevel %}
{% endif %}

{% assign indentAmount = headerLevel | minus: minHeader %}
{% assign _workspace = node | split: '</h' %}

{% assign _idWorkspace = _workspace[0] | split: 'id="' %}
{% assign _idWorkspace = _idWorkspace[1] | split: '"' %}
{% assign html_id = _idWorkspace[0] %}

{% assign _classWorkspace = _workspace[0] | split: 'class="' %}
{% assign _classWorkspace = _classWorkspace[1] | split: '"' %}
{% assign html_class = _classWorkspace[0] %}

{% if html_class contains "no_toc" %}
{% continue %}
{% endif %}

{% capture _hAttrToStrip %}{{ _workspace[0] | split: '>' | first }}>{% endcapture %}
{% assign header = _workspace[0] | replace: _hAttrToStrip, '' %}

{% assign space = '' %}
{% for i in (1..indentAmount) %}
{% assign space = space | prepend: ' ' %}
{% endfor %}

{% if include.item_class and include.item_class != blank %}
{% capture listItemClass %}{:.{{ include.item_class | replace: '%level%', headerLevel }}}{% endcapture %}
{% endif %}

{% capture heading_body %}{% if include.sanitize %}{{ header | strip_html }}{% else %}{{ header }}{% endif %}{% endcapture %}
{% capture my_toc %}{{ my_toc }}
{{ space }}{{ listModifier }} {{ listItemClass }} [{{ heading_body | replace: "|", "\|" }}]({% if include.baseurl %}{{ include.baseurl }}{% endif %}#{{ html_id }}){% if include.anchor_class %}{:.{{ include.anchor_class }}}{% endif %}{% endcapture %}
{% endfor %}

{% if include.class and include.class != blank %}
{% capture my_toc %}{:.{{ include.class }}}
{{ my_toc | lstrip }}{% endcapture %}
{% endif %}

{% if include.id %}
{% capture my_toc %}{: #{{ include.id }}}
{{ my_toc | lstrip }}{% endcapture %}
{% endif %}
{% endcapture %}{% assign tocWorkspace = '' %}{{ my_toc | markdownify | strip }}
5 changes: 5 additions & 0 deletions _layouts/eip.html
Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,11 @@ <h1 class="page-heading">
{% endif %}
</table>

<div class="toc">
<h2>Table of Contents</h2>
{% include toc.html html=content sanitize=true h_max=3 %}
</div>

{% include anchor_headings.html html=content anchorClass="anchor-link" beforeHeading=true %}

<h2>Citation</h2>
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