[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#16411: undo-only bugs
From: |
Stefan Monnier |
Subject: |
bug#16411: undo-only bugs |
Date: |
Mon, 13 Jan 2014 19:49:39 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
>> I guess I do have some idea how to do it, but it looks like a lot of
>> work, since we have to adjust the positions in the rest of
>> pending-undo-list.
> Are you saying the buffer positions in the undo data become
> invalidated? That could indeed be a detail I missed. Let me take a
> closer look.
Not exactly invalidated, but we can't just skip an undo-record without
adjusting the subsequent records.
We can skip a bunch of undo-record specified via undo-equiv-table
because that table stores pairs of undo states that correspond
to the exact same buffer, so the "adjustment" is a no-op.
>> Right: the loop that undoes N steps (either in undo-more or in undo
>> if we change undo to only call undo-more with a 1) needs not only to
>> use undo-equiv-table at each iteration to skip redo entries, but it
>> also needs to add an entry in undo-equiv-table at each iteration.
> And recall that these N are rolled into one redo record.
Not sure what you mean here.
> So a redo record needs to reference N records it undid.
I'm even more confused.
> Actually, this makes me realize the solution to bug 1 is inadequate.
> Calling (undo-primitive 1) N times creates N redo records whereas
> (undo-primitive N) creates one.
No, primitive-undo does not add any undo boundary.
Stefan
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/10
- bug#16411: undo-only bugs, Stefan Monnier, 2014/01/10
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/10
- bug#16411: undo-only bugs, Stefan Monnier, 2014/01/10
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/11
- bug#16411: undo-only bugs,
Stefan Monnier <=
- bug#16411: undo-only bugs, Stefan Monnier, 2014/01/13
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/14
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/18
- bug#16411: undo-only bugs, Stefan Monnier, 2014/01/18
- bug#16411: undo-only bugs, Barry OReilly, 2014/01/19