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Re: Native display of line numbers
From: |
Alan Mackenzie |
Subject: |
Re: Native display of line numbers |
Date: |
Sun, 18 Jun 2017 15:47:05 +0000 |
User-agent: |
Mutt/1.7.2 (2016-11-26) |
Hello, Eli.
On Sun, Jun 18, 2017 at 18:06:36 +0300, Eli Zaretskii wrote:
> > Date: Sun, 18 Jun 2017 11:42:51 +0000
> > Cc: address@hidden
> > From: Alan Mackenzie <address@hidden>
> > 1. Enable relative line numbers globally.
> > 2. Visit a file, put it in two or several side by side windows.
> > 3. Start follow-mode.
> > The relative line numbers are now "global", in that they are relative to
> > point in the selected window.
> That's not what I see. I guess you see that because you activate
> line-number display when both windows had the same value of point.
Line-number display was already globally enabled when the windows were
created. But point in each window was indeed the same (see my function
`3-column' below).
> If you move point in one of the windows before activating line numbers,
> you will see that the relative numbers are local to each window. This
> is by design, and the add-on package relative-line-numbers does the
> same.
> > 4. Do something, such as C-n, which causes a redisplay.
> > The relative numbers are now "local", in that they are relative to point
> > in each window.
> Well, here they are local to begin with.
> > I think it would be best if the "global" relative line numbers could be
> > made to work.
> Given a window whose buffer is in Follow Mode, how do I know what is
> the "correct" value of point to use in that window to make the
> relative numbers "global"?
I don't see that this can easily be done, since follow-mode more fights
the display engine rather than working with it. The display engine is
currently unaware of follow-mode. My comment was partly to point out how
nice it would be if follow-mode support could be implemented in the
display engine.
> > If not, it would be better if the "local" line numbers appeared
> > after M-x follow-mode.
> Well, they are local here to begin with. Maybe I didn't understand
> your recipe -- can you show it in full detail, with all the commands
> you type?
OK.
Firstly, I found this on a Linux tty, but it appears in an X session,
too.
$ emacs --no-desktop
M-x customize-variable<RET>display-line-numbers<RET>
<set display-line-numbers to relative using the keyboard or mouse and
save it for the session>
C-x C-f path/to/src/xdisp.c
If in X, maximise the selected window using the mouse.
C-c 3 ; see below.
The displayed line-numbers are now "global", and range from 0 to 194
C-n
The displayed line-numbers in the "other two" windows now range from -31
to 33.
########################################################################
(defun 3-column ()
"Disply the current buffer in 3 columns with Follow Mode"
(interactive)
(follow-mode 1)
(delete-other-windows)
(split-window-horizontally) (split-window-horizontally)
(balance-windows))
(global-set-key "\C-c3" '3-column)
########################################################################
I've found another bug, I'm afraid. Starting off from the above
situation, with point in the middle window (in X windows), do M-<. The
relative line numbers in the middle window now range from -59 to -20,
with that window's point at relative line -39.
--
Alan Mackenzie (Nuremberg, Germany).
- Re: Native display of line numbers, (continued)
- Re: Native display of line numbers, Alan Mackenzie, 2017/06/17
- Re: Native display of line numbers, Stefan Monnier, 2017/06/17
- Re: Native display of line numbers, Eli Zaretskii, 2017/06/17
- Re: Native display of line numbers, Alan Mackenzie, 2017/06/18
- Re: Native display of line numbers, Colin Baxter, 2017/06/18
- Re: Native display of line numbers, Eli Zaretskii, 2017/06/18
- Re: Native display of line numbers,
Alan Mackenzie <=
- Re: Native display of line numbers, Eli Zaretskii, 2017/06/18
- Re: Native display of line numbers, Alan Mackenzie, 2017/06/18
- Re: Native display of line numbers, Eli Zaretskii, 2017/06/18
Re: Native display of line numbers, Sébastien Le Callonnec, 2017/06/17
Re: Native display of line numbers, Mathias Dahl, 2017/06/17