Last year I blogged about a solution to a common problem I had with windows in Emacs. I wanted to be able to exit particular fullframed buffers and restore the windows as they were before opening those buffers.
The core of my solution is the following function:
(defun mu-save-wins-then-call (func &optional args) "Save current window configuration, then call FUNC optionally with ARGS." (interactive) (push (current-window-configuration) mu-saved-window-configuration) (cond ;; We have arguments for the function ((bound-and-true-p args) (funcall func args)) ;; The function requires exactly one argument, and we want it to be nil ((equal args "nil") (funcall func nil)) ;; The function does not expect arguments (t (funcall func))))
This function works fine for most of my cases, but it doesn’t take the prefix
argument into account. Since I rely heavily on
shell-mode, at times I need to
open more than one shell buffer, and the documentation of the shell command
specifies that the prefix argument can be used to open new buffers on demand:
Run an inferior shell, with I/O through BUFFER (which defaults to `shell'). Interactively, a prefix arg means to prompt for BUFFER.
Hence, I need to mimic C-u M-x shell in
(defun mu-save-wins-then-call (func &optional args) "Save current window configuration, then call FUNC optionally with ARGS." (interactive "P") (push (current-window-configuration) mu--saved-window-configuration) (cond ;; We have the prefix argument ((= (prefix-numeric-value args) 4) (let ((current-prefix-arg 4)) (call-interactively func))) ;; We have arguments for the function ((or (bound-and-true-p args) (stringp args)) (funcall func args)) ;; The function does not expect arguments (t (funcall func))))
Now I can open as many fullframed shell buffers as I want with C-u F1:
(defun mu-shell-open (&optional new-buffer) "Save window configuration and call `shell'. With NEW-BUFFER open a new buffer." (interactive "P") (mu-save-wins-then-call #'shell new-buffer)) (with-eval-after-load 'shell (fullframe shell mu-pop-window-configuration)) (bind-key "<f1>" mu-shell-open)
mu-pop-window-configuration is detailed here.