[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactiva
From: |
Eli Zaretskii |
Subject: |
bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark |
Date: |
Sun, 07 Apr 2019 18:42:40 +0300 |
> From: Markus Triska <triska@metalevel.at>
> Date: Sun, 07 Apr 2019 02:11:02 +0200
>
> Please start Emacs with "emacs -Q" and insert the following form in the
> *scratch* buffer:
>
> (progn
> (let (deactivate-mark)
> (switch-to-buffer (get-buffer-create "t"))
> (erase-buffer)
> (insert "hello"))
> (let (deactivate-mark)
> (set-mark-command nil)
> (move-beginning-of-line nil)))
>
> then place point at the end of the form and evaluate it with C-x C-e.
>
> You will see a new buffer ("t"), where "hello" is inserted and nothing
> is highlighted because the mark is inactive.
>
> However, I expect the mark to be active and the region highlighted,
> because the form binds deactivate-mark to nil. This is the way that is
> recommended in the Elisp manual, see for Example 31.7 "The Mark":
>
> To write Lisp code that modifies the buffer without causing
> deactivation of the mark at the end of the command, bind
> ‘deactivate-mark’ to ‘nil’ around the code that does the
> modification. For example:
>
> (let (deactivate-mark)
> (insert " "))
>
I think you need to put the entire progn inside the binding of
deactivate-mark. IOW, the binding should be in effect when the
command terminates.
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Markus Triska, 2019/04/06
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark,
Eli Zaretskii <=
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Markus Triska, 2019/04/07
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Eli Zaretskii, 2019/04/07
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Markus Triska, 2019/04/08
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Eli Zaretskii, 2019/04/08
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Markus Triska, 2019/04/08
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Eli Zaretskii, 2019/04/08
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Noam Postavsky, 2019/04/08
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Markus Triska, 2019/04/09
- bug#35177: 27.0.50; Binding deactivate-mark to nil unexpectedly deactivates the mark, Noam Postavsky, 2019/04/09