From: Filippo Argiolas <filippo.argiolas@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Foreground color opacity
Date: Mon, 11 Sep 2023 15:09:45 +0200 [thread overview]
Message-ID: <CAOdrLG+MJ7KVZZp7cjpPjs=dKpaVmb-k2-ML0jLcdBWA8gLcqQ@mail.gmail.com> (raw)
In-Reply-To: <83fs3krhmi.fsf@gnu.org>
On Mon, Sep 11, 2023 at 2:59 PM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Filippo Argiolas <filippo.argiolas@gmail.com>
> > Date: Mon, 11 Sep 2023 12:45:04 +0200
> >
> > My approach so far has been something like this:
> > - label inactive regions with a dedicated text property
> > - add a function that runs after fontify-lock-fontify-region-function
> > (after so we run when we have fortified text with font lock faces)
> > - inside the fontify function detect face changes in the inactive
> > region and for each different face encountered apply a new one with
> > foreground color computed blending current foreground and background
> >
> > It seems to work so far and I like the result, but I keep thinking
> > it's overly complicated for something so simple as setting text
> > opacity. I'm pretty new to emacs lisp, am I missing a face attribute I
> > can just set in an overlay and get the same result? Wouldn't it make
> > sense to have something like this at backend level if it doesn't exist
> > yet?
>
> Why not cover the "inactive" portion with an overlay which has the
> 'face' (or font-lock-face) property that specifies only the opacity?
> That is IMO simpler and doesn't need to run any functions after
> fontifications.
>
> (Caveat: I didn't actually try this approach, so maybe I'm missing
> something.)
>
> Thanks.
That would be the perfect solution, but as far as I can tell we don't
have an opacity face attribute, do we?
Filippo
next prev parent reply other threads:[~2023-09-11 13:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-11 10:45 Foreground color opacity Filippo Argiolas
2023-09-11 12:58 ` Eli Zaretskii
2023-09-11 13:09 ` Filippo Argiolas [this message]
2023-09-11 14:04 ` Eli Zaretskii
2023-09-11 14:58 ` [External] : " Drew Adams
2023-09-11 16:08 ` Filippo Argiolas
2023-09-11 16:25 ` Filippo Argiolas
2023-09-11 16:56 ` Eli Zaretskii
2023-09-11 19:00 ` Filippo Argiolas
2023-09-12 2:21 ` Eli Zaretskii
2023-09-12 4:55 ` Filippo Argiolas
2023-09-12 5:24 ` Filippo Argiolas
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