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Re: How to determine buffer change
From: |
Thorsten Jolitz |
Subject: |
Re: How to determine buffer change |
Date: |
Sat, 05 Apr 2014 16:54:28 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>>> in a program I insert text in an empty temporary edit-buffer, what of
>>> course modifies the `buffer-undo-list'.
>>> Assume that at this moment (lets call it time T1)
>>>
>>> ,------------------------------
>>> | M-: (length buffer-undo-list)
>>> `------------------------------
>>>
>>> returns 9.
>>>
>>> Now when there are changes to the text in the edit-buffer, these are
>>> copied to the original buffer after quitting. But when nothing has
>>> changed after the insertion of the original text, it would be better to
>>> simply discard the edit-buffer and not touch the original buffer at
>>> all.
>>>
>>> I could remember the length of the buffer-undo-list at time T1 and then
>>> check if it changed when quitting, but this does not seem very robust,
>>> since this length grows and shrinks in both directions.
>
>> Did you try using buffer-modified-tick?
> set buffer-undo-list to nil (after all, so you really want the user to
> be able to un-insert the initial text?).
No, I don't, and the simplest solutions are often the best but don't
come to ones mind first. That works like a charm, thanks.
--
cheers,
Thorsten