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bug#35860: Delayed window positioning after buffer display
From: |
Juri Linkov |
Subject: |
bug#35860: Delayed window positioning after buffer display |
Date: |
Fri, 24 May 2019 21:34:18 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu) |
>> >> ;; `help-window-point-marker' is a marker you can move to a valid
>> >> ;; position of the buffer shown in the help window in order to override
>> >> ;; the standard positioning mechanism (`point-min') chosen by
>> >> ;; `with-output-to-temp-buffer' and `with-temp-buffer-window'.
>> >> ;; `with-help-window' has this point nowhere before exiting. Currently
>> >> ;; used by `view-lossage' to assert that the last keystrokes are always
>> >> ;; visible.
>> >> (defvar help-window-point-marker (make-marker)
>> >> "Marker to override default `window-point' in help windows.")
>> >
>> > Why not bind switch-to-buffer-preserve-window-point to nil instead?
>>
>> I don't know. I tried to replace
>>
>> (set-marker help-window-point-marker (point))
>>
>> with
>>
>> (goto-char (point-max))
>> (setq-local switch-to-buffer-preserve-window-point nil)
>>
>> and it doesn't set point to the end of the Help buffer
>> when it's displayed for the first time.
>
> Can you show a recipe starting from "emacs -Q" that exhibits this
> behavior. It sounds like I'm confused about what exactly happens.
0. emacs -Q
1. C-h l
Then point in the *Help* buffer should be at the bottom,
but when setting switch-to-buffer-preserve-window-point to nil
instead of using set-marker, point still is at the top of the buffer.