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bug#11445: 24.0.96; Customize buffer edit fields should have undo
From: |
Mauro Aranda |
Subject: |
bug#11445: 24.0.96; Customize buffer edit fields should have undo |
Date: |
Wed, 02 Jun 2021 09:21:39 -0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Lars Ingebrigtsen <larsi@gnus.org> writes:
> "Drew Adams" <drew.adams@oracle.com> writes:
>
>> A text editing field in Customize is like text editing in general. Why
>> shouldn't undo be available to users here?
>
> As far as I can tell, `undo' works fine in text fields in Customize
> buffers. Are you still seeing this problem in recent Emacs versions?
It cannot work reliably: if a widget needs to be redrawn, the widget
code will clear the undo information with widget-clear-undo.
Try this:
emacs -Q
M-x customize-group RET mouse
TAB until point is at the arrow to expand the double-click-fuzz option
RET
TAB to move to the field
deletechar
4
C-x u shows the empty field, which is fine
C-x u again: "No further undo information". But that's not expected; if
undo worked, the field value would be the default value.