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Re: [Patch]: Allow overlay arrows to be inserted before the text at colu
From: |
Alan Mackenzie |
Subject: |
Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it. |
Date: |
Mon, 19 Aug 2019 19:28:29 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Hello, Eli.
On Mon, Aug 19, 2019 at 05:29:42 +0300, Eli Zaretskii wrote:
> > Date: Sun, 18 Aug 2019 19:23:10 +0000
> > Cc: address@hidden
> > From: Alan Mackenzie <address@hidden>
> > > Sorry, I'm confused now: how can you insert the arrow without either
> > > moving the rest of the line to the right or overwriting its first few
> > > glyphs? Where does the space for the arrow come from?
> > Sorry for being a bit inexact. In that bit I meant inserting "=>" by
> > overwriting the two characters in columns 0 and 1. We need to be able
> > to do this.
> But AFAIR that's exactly what the current implementation of
> overlay-arrow on TTY frames does.
It is. I was talking here about the putative superseding of the overlay
arrow with (?higher level?) code using the display property in place of
the overlay arrow's current, ugly, mechanism.
It seems I switched over the subject I was talking about without making
this clear. Sorry. The subject I started with at the beginning of the
thread was extending the overlay arrow mechanism with my patch to
xdisp.c. I can understand people not liking this patch.
> So how exactly is your implementation different in this regard, and
> why did you need any new code for it?
The patch I proposed would have allowed the overlay arrow's mechanism to
be used to _insert_ "=>" before column zero on a line (rather than
overwriting the first two characters).
The general feeling in this thread is that I should rethink this patch,
instead using before-string overlay properties. This would enable me to
close bug #36832 (The one about not wanting to scroll the compilation
mode buffer on typing CR) satisfactorally.
I intend to do this in the coming days.
> Still confused.
I'll try to be a bit more considerate in future threads, when my
thinking starts getting unstable, and there's a danger of me zipping
between confusingly related, but different, topics.
I hope this thread has become at least moderately clear, now.
--
Alan Mackenzie (Nuremberg, Germany).
- [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Alan Mackenzie, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Alan Mackenzie, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Alan Mackenzie, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Alan Mackenzie, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it.,
Alan Mackenzie <=
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/19
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Noam Postavsky, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Alan Mackenzie, 2019/08/18
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Stefan Monnier, 2019/08/19
- Re: [Patch]: Allow overlay arrows to be inserted before the text at column zero rather than splatting it., Eli Zaretskii, 2019/08/19