Add Ruby, RDoc and ERB language support

[caleb]

Mostly this patch just sets Ruby styles to inherit from the generic styles, but some styles needed to be manually set to make it consistent with the rest of the theme.

Before:

After:

[caleb]

I will spend some more time tweaking this to match the other languages/editors in the nord ecosystem, but this is a huge step up at the moment.

[arcticicestudio]

Hi @caleb 👋, thanks for your contribution 👍

This already looks great. I'll review and test the changes, but my first change request would be to explicitly define the syntax element attributes instead of inheriting from others.
Unfortunately this is currently an inevitable step we need to go because of the problem documented in #120. It was fixed in #121 some time ago, but for new languages we need to implement keys the same way. Otherwise as far as I can see on the screenshots the highlighting looks fantastic 😄

I'll review it in detail later on. Please note that it might take some time due to hundreds of other issues/PRs/support requests in other projects and my limited free time (combined with the current health situation of this world).

[caleb]

Okay, I can update the theme to specify the colors rather than inherit.

Once this looks good, I have a minor update for the clojure language to change keyword highlighting (e.g. :keyword).

Thanks!

[mariojackson]

Hi there,

It seems like the problem is still there. Have been patiently waiting since a few months, since I know that Sven is often very busy. Now I just want to ask if this is still in progress?

Thanks in advance!

[mariojackson]

Hi @arcticicestudio,

Can you already tell, if this one will get reviewed and eventually merged into the next release?

[arcticicestudio]

Hi @mariojackson, as far as I understand @caleb was about to update the PR to use the explicitly defined syntax element attributes instead of the inherited colors.
But since it is currently the only remaining ticket for the next release version I can take care of it to ship it as soon as possible.

[mariojackson]

Hi @arcticicestudio,

That would be awesome if you could do that. If you can't, I could also wait of course or do it myself. I initially thought that this just had to be reviewed :)

Thanks you Sven!

[arcticicestudio]

I've adapted the changes and tested it locally. Looks good so far so I guess I'll push and merge this tomorrow to package and deploy the new release version 🚢

[arcticicestudio]

@caleb Thanks again for your contribution 👍
Unfortunately you've created this PR based on the develop branch instead of a dedicated story branch so I also had to push the changes to the default branch of your fork.

The colors are now explicitly defined instead of relying on the (broken) inheritance system
I've also added dedicated support for RDoc.

RDoc

Next to this I also adjusted some styles of some Ruby elements to better fit to the style of other languages.

ERB

Since I've never used Ruby I had to read something about the syntax to understand curious elements like Symbols.

The final results looks like this:

Ruby syntax before

Ruby syntax after

[arcticicestudio]

@mariojackson Plugin version 0.13.0 is deployed to the JetBrains plugin registry and should be available soon 🚀

[mariojackson]

Hi @arcticicestudio

Thanks once again for your research, explanations and awesome work ✌🏽

I'm glad to be able to support you a little.

Have a nice start into the week!

[arcticicestudio]

Thanks, I wish you the same 😊

Unfortunately the Ruby plugin groups identifiers and structs/classes into the same syntax highlighting group so both are now using nord4. I hope this will me improved in some plugin and RubyMine updates so that we can achieve a more consistent style.