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Message-ID: <1435878673.17325.5.camel@niobium.home.fifi.org>
Subject: Re: Tip of the day: restoring an aborted command-line
From: Philippe Troin <phil@fifi.org>
To: zzapper <david@rayninfo.co.uk>
Cc: zsh-users@zsh.org
Date: Thu, 02 Jul 2015 16:11:13 -0700
In-Reply-To: <XnsA4CBE4DD846E3davidrayninfocouk@80.91.229.13>
References: <30469.1435788779@thecus.kiddle.eu>
	 <XnsA4CBE4DD846E3davidrayninfocouk@80.91.229.13>
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On Thu, 2015-07-02 at 21:29 +0000, zzapper wrote:
> Oliver Kiddle <okiddle@yahoo.co.uk> wrote in
> news:30469.1435788779@thecus.kiddle.eu: 
> 
> > When you abort a command-line with Ctrl-C or whatever, the Zsh line
> > editor sets $ZLE_LINE_ABORTED to the contents of the command-line
> > before it was aborted. Sometimes you might want to recover the aborted
> > line and you could bind a dedicated key to that purpose. The following
> 
> > 
> >   zle-line-init () {
> >     if [[ -n $ZLE_LINE_ABORTED ]]; then
> >       local savebuf="$BUFFER" savecur="$CURSOR"
> >       BUFFER="$ZLE_LINE_ABORTED" 
> >       CURSOR="$#BUFFER" 
> >       zle split-undo
> >       BUFFER="$savebuf" CURSOR="$savecur" 
> >     fi
> >   }
> 
> > Oliver
> is $ZLE_LINE_ABORTED dependent on any autoload? as i have it on cygwin
> but not on centos (both 5.08) 

It shouldn't.

I'd like to propose the following enhancement:

         zle-line-init () {
            if [[ -n $ZLE_LINE_ABORTED ]]; then
              _last_aborted_line=$ZLE_LINE_ABORTED    
            fi
            if [[ -n $_last_aborted_line ]]    
            then
              local savebuf="$BUFFER" savecur="$CURSOR"
              BUFFER="$_last_aborted_line"     
              CURSOR="$#BUFFER" 
              zle split-undo
              BUFFER="$savebuf" CURSOR="$savecur"
            fi
          }
        zle -N zle-line-init
        zle-line-finish() { 
           unset _last_aborted_line
        }
        zle -N zle-line-finish  

Now this handle the case when you press Ctrl-C multiple times in a row.
Eg:
        zsh% foo=^C
        zsh% ^C
        zsh% ^C
        zsh% <undo>
        zsh% foo=

Phil.