PS1 or PS2

PS1 or PS2

[Andrej Borsenkow]

I already wrote about this: when on PS2 up-line-or-history moves to previous
history event instead of previous line of current event. It just occured to me,
that something like

if we-are-on-PS2
  zle .push-line-or-edit
zle .up-line-or-history

would do quite nicely ... but how can I find out (in user defined widget) that I
am on PS2? The info is available (push-line-or-edit has it) - is it possible to
make it available to user widgets as well?

/andrej

Re: PS1 or PS2

[Bart Schaefer]

On Jun 29,  5:09pm, Andrej Borsenkow wrote:
} Subject: RE: PS1 or PS2
}
} >
} > It almost works ...
} >
} > bor@itsrm2:~%> _Fn-up-line-or-history () {
} > function> [[ -n "$PREBUFFER" ]] && zle .push-line-or-edit
} > function> zle .up-line-or-history
} > function> }
} 
} After zle .push-line-or-edit both BUFFER and PREBUFFER are empty. Are they
} static values computed on the entry into widget or do they reflect real ZLE
} buffers?

I think they reflect real ZLE buffers.  The "problem" is with the way that
push-input/get-line (and consequently push-line-or-edit) are implemented:
They do something similar to

	print -z "$BUFFER"
	BUFFER=""

and then wait for zle_refresh() to come around and yank the buffer back.
So if you're entirely inside a zle widget (or a bindkey -s), you can't do
anything to the pushed input; it simply isn't there anymore until zsh has
a chance to print a prompt again.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

RE: PS1 or PS2

[Andrej Borsenkow]

>
> It almost works ...
>
> bor@itsrm2:~%> _Fn-up-line-or-history () {
> function> [[ -n "$PREBUFFER" ]] && zle .push-line-or-edit
> function> zle .up-line-or-history
> function> }

After zle .push-line-or-edit both BUFFER and PREBUFFER are empty. Are they
static values computed on the entry into widget or do they reflect real ZLE
buffers?

RE: PS1 or PS2

[Andrej Borsenkow]

> > 
> > would do quite nicely ... but how can I find out (in user defined 
> widget) that I
> > am on PS2? The info is available (push-line-or-edit has it) - is it 
> possible to
> > make it available to user widgets as well?
> 
> I haven't tried, but [[ -z "$PREBUFFER" ]] should work.
> 

It almost works ...

bor@itsrm2:~%> _Fn-up-line-or-history () {
function> [[ -n "$PREBUFFER" ]] && zle .push-line-or-edit
function> zle .up-line-or-history
function> }
bor@itsrm2:~%> zle -N up-line-or-history _Fn-up-line-or-history
bor@itsrm2:~%> while true
while> <CursorUp>
beeps and I get
bor@itsrm2:~%> while true
<<< cursor here

That is, zle .up-line-or-history seems to be never executed.

/andrej

Re: PS1 or PS2

[Sven Wischnowsky]

Andrej Borsenkow wrote:

> I already wrote about this: when on PS2 up-line-or-history moves to previous
> history event instead of previous line of current event. It just occured to me,
> that something like
> 
> if we-are-on-PS2
>   zle .push-line-or-edit
> zle .up-line-or-history
> 
> would do quite nicely ... but how can I find out (in user defined widget) that I
> am on PS2? The info is available (push-line-or-edit has it) - is it possible to
> make it available to user widgets as well?

I haven't tried, but [[ -z "$PREBUFFER" ]] should work.

Bye
 Sven


--
Sven Wischnowsky                         wischnow@informatik.hu-berlin.de