Asciidoctor :: Discussion - Re: Asciidoctor-pdf style overwrite possible?

Re: Asciidoctor-pdf style overwrite possible?

Posted by mojavelinux on Nov 22, 2018; 2:15am
URL: https://discuss.asciidoctor.org/Asciidoctor-pdf-style-overwrite-possible-tp6439p6591.html

Asciidoctor PDF was not designed for this level of customization. However, it's possible to monkeypatch the converter to alter the behavior. I'll explain how to do that.

First, create a patched version of the converter in the file mypdfconverter.rb:

require 'asciidoctor-pdf'

module MyPdfConverter
def convert_listing node
    code_background_color = @theme.code_background_color
    @theme.code_background_color = '00ff00' if node.has_role? 'green'
    super
    @theme.code_background_color = code_background_color
end
end

class Asciidoctor::Pdf::Converter
prepend MyPdfConverter
end

Next, load this file when invoking asciidoctor-pdf:

asciidoctor-pdf -r ./mypdfconverter.rb document.adoc

You should see that the listing block with the role "green" now has a green background.

Note, the prepend command creates a hierarchy similar to extending the class, except creates the hierarchy in place.

Cheers,

-Dan

On Wed, Aug 1, 2018 at 4:44 AM Claudius Heine [via Asciidoctor :: Discussion] <[hidden email]> wrote:

Hi,

I am currently writing a presentation with asciidoctor-revealjs and
also like to generate a handout from this using asciidoctor-pdf.

I have some bash code passages that need to be executed in different
contexts, so I choose to add classes to those code passages like this:

[.greencode, source, bash]
----
include::source.sh[tag=some-tag]
----

And then use the customcss attribute to change the background color of
this code segment like this:

.greencode code {
background-color: darkgreen;
}

And that works great!

But how can I do something similar in the pdf output?

If I understand the documentation about the pdf styling correctly, then
its only possible to change the background of all code passages and not
just selectively. Is there a way around this or did I overlooked
something?

Thanks!
Claudius

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