GNU bug report logs - #65418
29.1; Eglot: support clangd inactiveRegions extension

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From: Filippo Argiolas <filippo.argiolas <at> gmail.com>
To: João Távora <joaotavora <at> gmail.com>
Cc: 65418 <at> debbugs.gnu.org, Philip Kaludercic <philipk <at> posteo.net>, Felician Nemeth <felician.nemeth <at> gmail.com>
Subject: bug#65418: 29.1; Eglot: support clangd inactiveRegions extension
Date: Sat, 2 Sep 2023 10:14:26 +0200

On Sun, Aug 27, 2023 at 3:58 PM João Távora <joaotavora <at> gmail.com> wrote:
> > One thing about UI, all the themes I tried seem to render shadow as
> > grey-ish but it was my impression reading the docs that it would be a
> > dim version of the current face, so it would still have syntax
> > highlighting. Is it just a theme limitation (probably because shadow
> > wasn't used for something like this before) or it's not technically
> > possible?
>
> I'm fairly sure it's technically possible, even if perhaps not easy.
> You can investigate or ask this on emacs-devel.

Hi again,
I ended up investigating this on my own and managed to get something working.

https://github.com/fargiolas/eglot-clangd-inactive-regions/blob/master/eglot-clangd-inactive-regions.el

Still experimenting on it, the idea is to iterate over each inactive
region, detect face changes and create an overlay with a darkened
version of them, blending foreground and background colors.
No idea if that's the best approach but it works so far and I'm loving
the result!

Comments/criticisms/patches/PRs welcome (maybe outside of this bug report).
Despite being an emacs user for maybe 15+ years, that's the first time
I ever wrote more than two lines of elisp.

Thanks,
Filippo

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