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bug#32839: 27.0.50; recenter doesn't redisplay
From: |
Juri Linkov |
Subject: |
bug#32839: 27.0.50; recenter doesn't redisplay |
Date: |
Sun, 30 Sep 2018 02:38:03 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu) |
>> The docstring of window-scroll-functions says:
>>
>> These functions are called whenever the ‘window-start’ marker is modified,
>> either to point into another buffer (e.g. via ‘set-window-buffer’) or
>> another
>> place in the same buffer.
>
> You've omitted the first line of the doc string:
>
> List of functions to call before redisplaying a window with scrolling.
> ^^^^^^^^^^^^^^
But (info "(emacs) Recentering") says that recentering is scrolling:
Typing ‘C-l’ twice in a row (‘C-l C-l’) scrolls the window so that
^^^^^^^
point is on the topmost screen line. Typing a third ‘C-l’ scrolls the
^^^^^^^
window so that point is on the bottom-most screen line. Each successive
‘C-l’ cycles through these three positions.
So 'C-l C-l C-l' is eligible for the calls of window-scroll-functions.
>> Maybe it will be called in the new hook window-state-change-functions
>> proposed by Martin.
>
> I hope not.
I grepped for window-scroll-functions, and see that the current situation
is quite bad:
1. tabulated-list-window-scroll-function is not called on 'C-u -1 C-l'
when the last window line is fully visible, so it doesn't adjust
the width for display-line-numbers in this case.
2. linum-mode relies more on post-command-hook because
window-scroll-functions is not reliable.
3. erc-scroll-to-bottom was forced to replace window-scroll-functions
with post-command-hook because window-scroll-functions doesn't
support altering the way the window is scrolled.
The only hope to fix these problems and to close this report is to call
the new hook window-state-change-functions at the very end when the
redisplay is completely finished, probably at the same time when
post-command-hook is called.
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/25
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/25
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/25
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/26
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/26
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/27
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/27
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/28
- bug#32839: 27.0.50; recenter doesn't redisplay,
Juri Linkov <=
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/30
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/30
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/29
- bug#32839: 27.0.50; recenter doesn't redisplay, Eli Zaretskii, 2018/09/30
- bug#32839: 27.0.50; recenter doesn't redisplay, Juri Linkov, 2018/09/30