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Re: require-hard-newlines to use newline

From: Kim F. Storm
Subject: Re: require-hard-newlines to use newline
Date: Fri, 11 Mar 2005 15:57:04 +0100
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

>> + (defvar before-kill-functions nil
>> +   "List of functions called on the region before killing.
>> + This abnormal hook is run before `kill-region' and
>> + `copy-region-as-kill', with the beginning and end positions of
>> + the killed region as the arguments.")
> I think it's usually important to keep the property that killing doesn't
> modify the buffer's text (when used in copy-as-kill), so rather than having
> before-kill-functions modify the buffer's text just before it's put in the
> kill-ring, it would be more convenient to make it return the string,
> i.e. use it as a replacement for buffer-substring.

I like the idea, but returning a value from a hook is rather
inconvenient -- if there are multiple functions on the hook, which
value should you use eventually?

Perhaps before-kill-functions should get START, END and STRING
as arguments where STRING is the result of buffer-substring.

Each hook could then modify that string as they please.

Or perhaps a different approach:

Run after-kill-hooks (a normal hook!) as the last thing in kill-region
and copy-region-as-kill, i.e. after putting the string into
the kill-ring.  If necessary, the hooks can modify the head of
the kill-ring as they please...?

Kim F. Storm <address@hidden> http://www.cua.dk

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