From: "Štěpán Němec" <stepnem@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Emacs-Devel devel <emacs-devel@gnu.org>,
Fabian Ezequiel Gallina <galli.87@gmail.com>
Subject: Re: Comint: handle raw tab
Date: Tue, 13 Sep 2011 15:51:52 +0200 [thread overview]
Message-ID: <87vcsw1rev.fsf@gmail.com> (raw)
In-Reply-To: <jwv62kwpqiw.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Tue, 13 Sep 2011 08:43:10 -0400")
On Tue, 13 Sep 2011 14:43:10 +0200
Stefan Monnier wrote:
>> First case scenario, unique completion:
>> Consider the only possible completion being "True".
>> In [1]: Tr
>> Then hit C-q TAB so a TAB gets inserted after it and evaled:
>> (comint-send-input t)
>> In a normal ipython shell the result of this causes the input to be expanded
>> to "True" which is the unique completion. On the comint buffer this causes
>> the input to remain frozen. Internally, the input *does* get updated since
>> when I hit RET after evaling the code above the out shows "True" but I
>> didn't find a way to update the current input accordingly. Is there any way
>> to achieve that?
>
> You're going to have to redirect the process's output to read the
> shell's output and then use it to fill the user's current input.
>
>> Second scenario, multiple completions available:
>> Consider now I have typed just T:
>> In [1]: T
>> Then hit C-q TAB so a TAB gets inserted after it and evaled:
>> (comint-send-input t)
>> Now interesting things happens, since ipython outputs the list of possible
>> completions I can get them with comint-output-filter-functions, the thing is
>> the buffer now looks like this:
>> In [1]: T
>> TabError True TypeError
>
>> And the only way I found to show the prompt again without sending "T" to the
>> process was sending a BREAK signal because comint-delete-input does not work
>> in that instance. Is there a better way to handle that?
>
> The better way (IMNSHO) is to catch the process output so it doesn't get
> inserted in the buffer, build a completion table from it, and then
> call the normal in-buffer completion code with it so it gets displayed
> in *Completions*.
IMO native tab completion for subprocess REPLs is a common enough need
that the basic machinery should be handled by Emacs itself, i.e.
probably the comint library. I'm somewhat surprised there is no such
code yet (or is there, outside Emacs perhaps?).
--
Štěpán
next prev parent reply other threads:[~2011-09-13 13:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-12 3:34 Comint: handle raw tab Fabian Ezequiel Gallina
2011-09-13 12:43 ` Stefan Monnier
2011-09-13 13:51 ` Štěpán Němec [this message]
2011-09-13 15:23 ` Fabian Ezequiel Gallina
2011-09-13 18:19 ` Stefan Monnier
2011-09-26 1:30 ` Fabian Ezequiel Gallina
2011-09-13 15:20 ` Fabian Ezequiel Gallina
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87vcsw1rev.fsf@gmail.com \
--to=stepnem@gmail.com \
--cc=emacs-devel@gnu.org \
--cc=galli.87@gmail.com \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.