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Re: Confusion about first-change-hook
From: |
Jambunathan K |
Subject: |
Re: Confusion about first-change-hook |
Date: |
Wed, 19 Dec 2012 02:31:53 +0530 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
David Engster <address@hidden> writes:
> I wanted to do something very simple: Activate whitespace-mode only when
> I start editing a buffer. So I looked into the manual and found
> `first-change-hook', which seemed exactly what I wanted.
This seems to work:
(add-hook 'c++-mode-hook
(lambda nil
(add-hook 'before-change-functions 'activate-whitespace-mode
nil 'local)))
(defun activate-whitespace-mode (beg end)
(whitespace-mode 1)
(remove-hook 'before-change-functions
'activate-whitespace-mode 'local))
>
> However, I soon saw that whitespace-mode got immediately activated in my
> C++ buffers. The reason is that changing a text property apparently
> already counts as "changing the buffer". Is this really the desired
> behavior? If so, what else is there to achieve the above? Should I file
> a wishlist-bug for something like 'buffer-modified-hook'?
>
> -David
>
>
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