varia.website/plugins/jinja2content

Jinja2 Content

This plugin allows the use of Jinja2 directives inside your pelican articles and pages. This template rendering is done before the final html is generated, i.e. before your theme's article.html is applied. This means the context and jinja variables usually visible to your article template ARE NOT available at this time.

All code that needs those variables (article, category, etc) should be put inside the theme's template logic. As such, the main use of this plugin is to automatically generate parts of your articles.

Example

One usage is to embed repetitive html code into Markdown articles. Since Markdown doesn't care for layout, if anything more sophisticated than just displaying an image is necessary, one is forced to embed html in Markdown articles (at the very least, hardcode <div> tags and then select them from the theme's CSS). However, with jinja2content, one can do the following.

File my-cool-article.md

# My cool title

My cool content.

{% from 'img_desc.html' import img_desc %}
{{ img_desc("/images/my-cool-image.png",
    "This is a cool tooltip",
    "This is a very cool image.") }}

Where file img_desc.html contains:

{% macro img_desc(src, title='', desc='') -%}
<div class="img-desc">
  <p><img src="{{ src }}" title="{{ title }}"></p>
  {% if desc %}
  <p><em>{{ desc }}</em></p>
  {% endif %}
</div>
{%- endmacro %}

The result will be:

# My cool title

My cool content.

<div class="img-desc">
  <p><img src="/images/my-cool-image.png" title="This is a cool tooltip"></p>
  <p><em>This is a very cool image.</em></p>
</div>

After this, the Markdown will be rendered into html and only then the theme's templates will be applied.

In this way, Markdown articles have more control over the content that is passed to the theme's article.html template, without the need to pollute the Markdown with html. Another added benefit is that now img_desc is reusable across articles.

Note that templates rendered with jinja2content can contain Markdown as well as html, since they are added before the Markdown content is converted to html.

Configuration

This plugin accepts the setting "JINJA2CONTENT_TEMPLATES" which should be set to a list of paths relative to 'PATH' (the main content directory). jinja2content will look for templates inside these directories, in order. If they are not found in any, the theme's templates folder is used.

Notes

• Only Markdown supported at this moment. Adding .rst support shouldn't be too hard, and you can ask for it by opening an issue.
• This plugin is intended to replace pelican-jinj2content which hasn't been developed in a while and generated empty <p> tags in the final html output.