hl-line mode -- visual effect

hl-line mode -- visual effect

[Dani Moncayo]

Hello guys,

I have this in my init file, to enable "hl-line" mode in all my buffers:
  (global-hl-line-mode 1)

Until now, I have customized the "hl-line" font to set a background
color, slightly more saturated than the background of the "default"
font.

This approach has worked reasonably well for me for quite some time.
But it's not perfect: I have buffers (eg. "*Diff*" buffer)
where the background color of each line conveys valuable semantic
information (added line, removed line, ...), and thus, in those
buffers,
my current approach doesn't work well, because the background color of
the selected line is fixed (i.e. _overrides_ the _original_ background
color of the line).

So, I'd like to highlight the selected line in a more subtle way: I'd
like the selected line to slightly alter[1] the _original_ background
color.

Does Emacs currently provide a reasonably simple way to achieve this?

TIA

-- 
Dani Moncayo

[1] "alter" could be something like "increase a bit the saturation or lightness"

Re: hl-line mode -- visual effect

[Eli Zaretskii]

> From: Dani Moncayo <dmoncayo@gmail.com>
> Date: Wed, 10 Aug 2022 19:51:29 +0200
> 
> Until now, I have customized the "hl-line" font to set a background
> color, slightly more saturated than the background of the "default"
> font.
> 
> This approach has worked reasonably well for me for quite some time.
> But it's not perfect: I have buffers (eg. "*Diff*" buffer)
> where the background color of each line conveys valuable semantic
> information (added line, removed line, ...), and thus, in those
> buffers,
> my current approach doesn't work well, because the background color of
> the selected line is fixed (i.e. _overrides_ the _original_ background
> color of the line).
> 
> So, I'd like to highlight the selected line in a more subtle way: I'd
> like the selected line to slightly alter[1] the _original_ background
> color.
> 
> Does Emacs currently provide a reasonably simple way to achieve this?

No, at least not in the way you put it.  When Emacs merges two colors
each of which has the same attribute (in this case, background color)
defined, only one of them "wins".

What you could do is highlight the line using face attributes other
than fore-/background colors.  But you already know that.

Re: hl-line mode -- visual effect

[Jean Louis]

Just use one of built-in themes with {M-x customize-themes RET} and
choose the one or two which gives you pleasant contrasts or how you
find it nice.

-- 
Jean

Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns

In support of Richard M. Stallman
https://stallmansupport.org/

Re: hl-line mode -- visual effect

[Dani Moncayo]

Good Morning,

I forgot to subscribe to the mailing list before posting. Sorry about that.

I've seen your replies from the mailing list web archives.

Thanks to Eli and Jean for replying.

-- 
Dani Moncayo

Re: hl-line mode -- visual effect

[Jean Louis]

* Dani Moncayo <dmoncayo@gmail.com> [2022-08-11 10:32]:
> I forgot to subscribe to the mailing list before posting. Sorry
> about that.

You need not be subscribed to mailing list. When people respond you
will get an answer. You can simply write to mailing list without being
subscribed.

Wow, what a freedom in GNU.

-- 
Jean

Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns

In support of Richard M. Stallman
https://stallmansupport.org/

Re: hl-line mode -- visual effect

[Eli Zaretskii]

> Date: Fri, 12 Aug 2022 00:16:49 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: "help-gnu-emacs@gnu.org list" <help-gnu-emacs@gnu.org>
> 
> * Dani Moncayo <dmoncayo@gmail.com> [2022-08-11 10:32]:
> > I forgot to subscribe to the mailing list before posting. Sorry
> > about that.
> 
> You need not be subscribed to mailing list. When people respond you
> will get an answer.

That depends on how people respond.  I, for example, respond only to
the list, on this list.

Re: hl-line mode -- visual effect

[Dani Moncayo]

On Thu, Aug 11, 2022 at 11:33 PM Jean Louis <bugs@gnu.support> wrote:
>
> You need not be subscribed to mailing list. When people respond you
> will get an answer. You can simply write to mailing list without being
> subscribed.

I didn't see any reply in my inbox, because (1) your reply somehow
went directly to my "Spam" folder (I don't know why), and (2) Eli
replied only to the list.

Thanks.

-- 
Dani Moncayo

Re: hl-line mode -- visual effect

[tomas]

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On Fri, Aug 12, 2022 at 08:20:56AM +0200, Dani Moncayo wrote:
> On Thu, Aug 11, 2022 at 11:33 PM Jean Louis <bugs@gnu.support> wrote:
> >
> > You need not be subscribed to mailing list. When people respond you
> > will get an answer. You can simply write to mailing list without being
> > subscribed.
> 
> I didn't see any reply in my inbox, because (1) your reply somehow
> went directly to my "Spam" folder (I don't know why),

Gmail is like that: ain't them charming?

> and (2) Eli replied only to the list.

Cheers
-- 
t

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