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Re: visual-region-mode?
From: |
Juri Linkov |
Subject: |
Re: visual-region-mode? |
Date: |
Mon, 17 Sep 2018 01:55:53 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu) |
> By the way, this definition of region is flawed.
>
> The mark is buffer-local, while the point is buffer-and-window-local.
> Display a buffer B in windows X and Y, mark a region in window X, then
> switch to window Y. Suddenly, an entirely unrelated fragment of text
> is highlighted as region.
>
> A consistent definition of a persistent region would make it an
> interval between two buffer-local markers, both of which are distinct
> from the point.
>
> A consistent definition of a transient region would make the mark also
> buffer-and-window-local, so that buffer B in windows X and Y could
> have completely independently marked regions.
Yes, this is an annoying problem. As a workaround, it's easy
to make the mark buffer-and-window-local with this simple code:
(defvar-local mark-active-window nil)
(add-hook 'activate-mark-hook (lambda () (setq mark-active-window
(selected-window))))
(add-hook 'deactivate-mark-hook (lambda () (setq mark-active-window nil)))
(defun redisplay--update-mark-active-window (window)
(when mark-active-window
(setq mark-active (eq mark-active-window window))))
(add-to-list 'pre-redisplay-functions #'redisplay--update-mark-active-window)
I'm not sure if a new customizable option is necessary to define the
preferable behavior like with the option `highlight-nonselected-windows'.
- Re: delete-selection-mode as default, (continued)
- Re: delete-selection-mode as default, hw, 2018/09/10
- visual-region-mode? (was: delete-selection-mode as default), hw, 2018/09/10
- Re: visual-region-mode? (was: delete-selection-mode as default), Charles A. Roelli, 2018/09/10
- Re: visual-region-mode? (was: delete-selection-mode as default), Yuri Khan, 2018/09/11
- Re: visual-region-mode? (was: delete-selection-mode as default), Charles A. Roelli, 2018/09/11
- Re: visual-region-mode? (was: delete-selection-mode as default), Yuri Khan, 2018/09/12
- Re: visual-region-mode?, Andreas Schwab, 2018/09/12
- Re: visual-region-mode?, Yuri Khan, 2018/09/12
- Re: visual-region-mode?, Andreas Schwab, 2018/09/12
- Re: visual-region-mode? (was: delete-selection-mode as default), Charles A. Roelli, 2018/09/12
- Re: visual-region-mode?,
Juri Linkov <=
- Re: visual-region-mode?, hw, 2018/09/11
- Re: visual-region-mode?, Charles A. Roelli, 2018/09/12
- RE: visual-region-mode?, Drew Adams, 2018/09/12
- Re: visual-region-mode?, Juri Linkov, 2018/09/12
- Re: visual-region-mode?, hw, 2018/09/13
- Re: visual-region-mode?, hw, 2018/09/13
- Re: visual-region-mode?, Alan Mackenzie, 2018/09/13
- Re: visual-region-mode?, hw, 2018/09/13
- Re: visual-region-mode?, Charles A. Roelli, 2018/09/13
- Re: visual-region-mode?, hw, 2018/09/15