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bug#70038: 29.3.50; Shift up/down in buffer with images on M-x other-win
From: |
Ramon Diaz-Uriarte |
Subject: |
bug#70038: 29.3.50; Shift up/down in buffer with images on M-x other-window with some fonts |
Date: |
Thu, 28 Mar 2024 17:59:51 +0100 |
User-agent: |
mu4e 1.12.1; emacs 29.3.50 |
Actually, maybe I can claim those bonus points: this does not depend on fonts,
though I am triggering it using the package vertico (so maybe this example is
vertico's fault):
Steps:
1. emacs -Q
2. eval this code
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(package-initialize)
(vertico-mode 1)
(progn
(defun pin-vscroll-down (win)
(set-window-vscroll win 200 t))
(let* ((height (/ (* 2 (frame-pixel-height)) 15))
(image1 (create-image "/tmp/image1.png" nil nil :height height))
(image2 (create-image "/tmp/image2.png" nil nil :height height))
(image3 (create-image "/tmp/image3.png" nil nil :height height)))
(with-current-buffer (get-buffer-create "*image-scroll-test*")
(insert " \n \n \n \n \n \n")
(put-image image1 1)
(put-image image2 5)
(put-image image3 9)
;; With larger image sizes (goto-char 3)
;; also consistently triggers the problem.
(goto-char 11)
(add-hook 'pre-redisplay-functions #'pin-vscroll-down nil t))
(split-window-right)
(other-window 1)
(switch-to-buffer "*image-scroll-test*")))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3. Do `M-x` (or C-x b). No need to execute anything or switch buffers, just
have the minibuffer show options.
4. `C-x o` a few times. You'll see the images move up and down.
I am seeing this in Lucid and GTK builds.
Best,
R.
On Thu, 28-March-2024, at 17:12:45, Ramon Diaz-Uriarte <rdiaz02@gmail.com>
wrote:
>> In that case, I don't understand what the font has to do with this: if
>> redisplay resets the window's vscroll, it should always do that, no?
>> Also, I don't have the fonts you used, so I cannot try the recipe as
>> is. I tried a few monospaced fonts I do have, and couldn't reproduce.
>> A recipe that doesn't depend on rare fonts would be appreciated.
>> Bonus points for providing a recipe that doesn't depend on fonts at
>> all.
>>
>> Thanks.
>
> I am afraid I don't get the bonus points, because all simple recipes I've
> found so far depend on fonts (even more, on the "rare fonts", which I use
> routinely.)
>
> Best,
>
> R.
--
Ramon Diaz-Uriarte
Department of Biochemistry, Lab B-31
Facultad de Medicina
Universidad Autónoma de Madrid
Arzobispo Morcillo, 4
28029 Madrid
Spain
Phone: +34-91-497-2412
Email: rdiaz02@gmail.com
r.diaz@uam.es
ramon.diaz@iib.uam.es
https://ligarto.org/rdiaz