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Re: Unbalanced change hooks (part 2)
From: |
Stefan Monnier |
Subject: |
Re: Unbalanced change hooks (part 2) |
Date: |
Tue, 02 Aug 2016 10:46:05 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
> Slightly less gross, perhaps:
> (i) Abandon the use of before-change-functions.
> (ii) Enable undo in pre-command-hook, if necessary.
> (iii) At each after-change-functions call:
> a - Analyze buffer-undo-list down as far as (or pos (next-nil)), and
> revert the insertion or deletion which as been made, taking
> particular care over coalesced multiple insertions/deletions.
> b - (setq pos (current-position-in-undo-list))
> c - Perform what used to be before-change actions.
> d - restore the insertion/deletion.
> e - Perform the normal after-change functions.
> (iv) Disable undo in post-command-hook, if appropriate.
Alan. I urge you to take a step back and think about how to solve your
problem without looking at the details of each change.
I am 100% sure, based on my experience with lots of major modes
(including cc-mode), that the result will be more robust, simpler, and
at least as efficient.
Stefan
- Re: Unbalanced change hooks (part 2), (continued)
- Re: Unbalanced change hooks (part 2), Eli Zaretskii, 2016/08/01
- Re: Unbalanced change hooks (part 2), Alan Mackenzie, 2016/08/01
- Re: Unbalanced change hooks (part 2), Eli Zaretskii, 2016/08/02
- Re: Unbalanced change hooks (part 2), Alan Mackenzie, 2016/08/02
- Re: Unbalanced change hooks (part 2), Eli Zaretskii, 2016/08/02
- Re: Unbalanced change hooks (part 2), Stefan Monnier, 2016/08/06
- Re: Unbalanced change hooks (part 2), Alan Mackenzie, 2016/08/07
- Re: Unbalanced change hooks (part 2), Stefan Monnier, 2016/08/07
- Re: Unbalanced change hooks (part 2), Alan Mackenzie, 2016/08/07
- Re: Unbalanced change hooks (part 2), Stefan Monnier, 2016/08/07
- Re: Unbalanced change hooks (part 2),
Stefan Monnier <=
- Re: Unbalanced change hooks (part 2), Eli Zaretskii, 2016/08/01
- Re: Unbalanced change hooks (part 2), Stefan Monnier, 2016/08/06
Re: Unbalanced change hooks (part 2), Eli Zaretskii, 2016/08/01
Re: Unbalanced change hooks (part 2), Richard Stallman, 2016/08/01