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Dear old literal history
- X-seq: zsh-workers 10996
- From: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx>
- To: zsh-workers@xxxxxxxxxxxxxx
- Subject: Dear old literal history
- Date: Fri, 28 Apr 2000 08:32:31 +0000
- Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
Does anyone else ever get nostalgic for "literal history"? This used to be
turned on by `setopt HIST_LIT' (or `set -j' for those wondering why the
single-letter options skip from -i to -k). Occasionally this was useful if
one wrote a complicated history substitution which failed in some small way,
and one therefore wanted to edit the line from *before* history was expanded.
I was about to suggest that it would be pretty easy now to reinstate the
literal history via ZLE widgets, when I discovered by an accident of search
terms that I already did so back in zsh-workers/4269. Except that now it's
possible to do a much better job, and widgets don't work quite like they
did a year and a half ago anyway.
-------------------------------------------------------------------------
typeset -A zle_lines
typeset -i zle_hist
precmd() {
zle_hist=${(%%):-%h} # The one icky bit
((zle_hist > HISTSIZE)) && unset zle_lines\[$[zle_hist-HISTSIZE]\]
}
zle-store () {
zle_lines[$zle_hist]=$BUFFER
zle .accept-line
}
zle-fetch-previous () {
zle .up-history || return 1
(($+zle_lines[$HISTNO])) && BUFFER=$zle_lines[$HISTNO]
return 0
}
zle-fetch-next () {
NUMERIC=-${NUMERIC:-1}
zle-fetch-previous
}
zle -N zle-store
zle -N zle-fetch-next
zle -N zle-fetch-previous
zle -A zle-store accept-line
-------------------------------------------------------------------------
An exercise for someone (maybe me, not tonight): Implement LITHISTSIZE.
(That means one can't use .up-history and HISTNO, which gets ugly.)
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
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