Re: Longlines and insert

[Chong Yidong <cyd@stupidchicken.com>]

Chong Yidong <cyd@stupidchicken.com> writes:

> One possibility is to define a new variable `insert-filters', to store
> a list of filter functions to run on strings before they are inserted
> (analogous to `buffer-substring-filters').

Let me be a little more specific: this would be a variable
`insert-string-filters', normally bound to nil.  insert_string (in
insdel.c) checks the value of insert-string-filters passed to it.  If
non-nil, it makes use of it as follows:

Like `buffer-substring-filters', `insert-string-filters' would contain
a list of function, each of which accepts a single argument, a string,
and returns a string.  The string argument is passed to the first
function in the list, and the return value of each function is passed
to the next.  The last return value is the one actually inserted.