Added support for color (?)

[jreades]

First time writing Lua and first time tweaking a Quarto extension, but I wanted the ability to specify a color for a fontawesome icon and believe I've done it. Extension seems to run without a problem on my system (Quarto version 1.3.450 on a M2 Mac running Sonoma 14.2) so here's a pull request that is hopefully fairly easy to parse.

Color is supported in a few ways:

• If you use a name like 'red' or 'green' then that will (presumably) only work in TeX
• Hexadecimal seems to work in both
• RGB triplets seem to work in both (haven't tried with an alpha blend, that probably doesn't)
  • If the triplets are in the range 0..1 and you generate HTML then they'll be converted to 0..255
  • If the triplets are in the range 0..255 and you generate TeX then they'll be converted to 0..1

Examples in example.qmd.

[cscheid]

Thanks for the PR. We've had similar requests in the past and we haven't merged them because they were only implemented in HTML. We have a number of features in Quarto that are only supported in HTML and PDF, so I think this might be good enough coverage for us right now. @dragonstyle what do you think?

[cscheid]

And I apologize, our PR template should have described it: we also need you to accept, sign and submit a CLA (https://github.com/quarto-dev/quarto-cli/blob/main/.github/pull_request_template.md)

[dragonstyle]

Seems good to me, esp for an extension!

[jreades]

Signed individual contributor license sent in to 'jj'. Apologies if I missed the PR template: while I broadly know how PRs work I've never really had to make use them so I didn't know what to look out for in terms of project-specific practices.

Noticed something in the info about udpating the changelog: is that something separate, I wasn't sure where to look for that? I did increment the version for the extension in the YAML file but, again, that might not have been the right way to do this so feel free to correct as needed. I also don't know if you have test cases that need writing to reflect this change or if the changes to the example.qmd file are enough.

jon

[cscheid]

Apologies if I missed the PR template

No need, you didn't miss anything! It's just that some folks are not willing or able to sign CLAs, and it feels bad for them to do the work before knowing that it can't be incorporated.

[mcanouil]

FYI:

• Add possibility to customise colours of the icons #18
• Inline Font color with {.class} are not correctly rendered in epub and pdf quarto-dev/quarto-cli#5300 (reply in thread)

Same thing for another more similar extension (mostly for HTML though):

• add style option  mcanouil/quarto-iconify#12