[ESS] do not change window configuration under R debugging

Alex Branham @|ex@br@nh@m @end|ng |rom gm@||@com
Wed Dec 16 20:56:55 CET 2020

Does adding display-buffer-reuse-window and/or
display-buffer-reuse-mode-window to your display-buffer-alist
configuration help?

(setq display-buffer-alist
      '(("*R" . (display-buffer-reuse-window

On Wed 16 Dec 2020 at 10:37, Ramon Diaz-Uriarte via ESS-help <ess-help using r-project.org> wrote:

> Dear All,
> A week ago I posted this question in stackoverflow
> (https://stackoverflow.com/questions/65216134/ess-emacs-do-not-change-window-configuration-under-r-debugging-tracebug),
> so as to be able to include screenshots; maybe it was not a great idea, so
> here I go without screenshots.
> I would like to prevent ESS from changing my window configuration but when
> ESS tracebug is active, entering debugging changes the window
> configuration.
> Suppose three windows in the emacs frame: (1) an R file that defines a
> function; (2) an R script that calls the function defined in (1); (3): the
> inferior R ess process. If from (2) I send code to the R interpreter, by
> default (2) gets replaced by (1) (showing the line to be evaluated,
> etc). The window showing (3) is left where it originally was; so we
> actually have the buffer that was in (1) shown twice (at 2 and at 1).
> This happens to me under this configuration (starting emacs as emacs -Q)
> (package-initialize)
> (use-package ess)
> I have an additional configuration (all in the spirit of "do not disrupt my
> window configuration: I'll tell you in what window to start by issuing M-x
> R there"):
> (setq display-buffer-alist
>       '(("*R" . (display-buffer-same-window)))
>       )
> With this configuration, under debug, window (2) now displays the R session
> (i.e., the inferior R buffer is shown at the original window location 3,
> and now at 2 also).
> If I disable tracebug, M-x ess-tracebug, no window changes take place, but
> I do not want to disable following the execution on the window (window 1)
> that has the code. I would like to use tracebug but avoid any change to my
> window configuration: just show (1) with the debugging stuff, but leave (2)
> alone. How can I do that?
> Thanks,
> R.

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