[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Behavior of with-current-buffer
From: |
Andreas Röhler |
Subject: |
Re: Behavior of with-current-buffer |
Date: |
Wed, 15 Apr 2020 10:37:05 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 |
Am 15.04.20 um 09:37 schrieb Andreas Röhler:
Hi,
have a buffer connected with a Python-process, however not in
comint-mode - for speed. See upper window in attachment
not-point-max.png.
In the case given "import json" was sent to this buffer by a function
‘py-fast-send-string’ which is shown partially in window below.
This function checks for a newline-char at the end of the string -
actually an extra "\n" was sent inside this or-clause.
After sending "\n", second-cursor in output-buffer is shown after the
newly inserted prompt at EOB. However, when or-clause returns, the
cursor jumps back to the position before the last prompt started, i.e.
at position before sending.
An extra (goto-char (point-max)) as shown in code would help, but
shouldn't be necessary.
Any explanation? A bug?
Thanks,
Andreas
GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.32,
cairo version 1.16.0) of 2020-04-06
Herewith two example to reproduce from Emacs -Q
(defun with-current-buffer-check ()
(interactive)
(let ((oldbuf (current-buffer))
(output-buffer (shell "With-current-buffer-Test")))
(set-buffer oldbuf)
(with-current-buffer output-buffer
(goto-char (point-max))
(insert "echo \"asdf\"")
(comint-send-input))))
(defun with-current-buffer-check-2 ()
(interactive)
(let* ((oldbuf (current-buffer))
(output-buffer (shell "With-current-buffer-Test-2"))
(proc (get-buffer-process output-buffer))
(strg "echo \"asdf\""))
(set-buffer oldbuf)
(with-current-buffer output-buffer
(process-send-string proc strg)
(or (string-match "\n$" strg)
(process-send-string proc "\n")))))