Re: Adding missing C-x 5 C-j and C-x t C-j commands

[Juri Linkov]

>>> I have a question the other way.  I forgot that `C-x 5 .'
>>> exists and tried `C-x 5 5 M-.' and was surprised to find it
>>> didn't work (it opened in the same frame as if I just did
>>> `M-.'.  Is it supposed to work or should I open a bug?
>>
>> It does the right thing after customizing
>> switch-to-buffer-obey-display-actions to t.
>
> Yes I see that too.
>
>> Maybe its default value should be changed to t?
>
> At least the docstring of other-frame-prefix (and friends) should
> be clearer about it's effect. I don't think I'm supposed to know
> which commands use switch-to-buffer internally.

Maybe more commands should use pop-to-buffer-same-window
instead of switch-to-buffer.  But OTOH, too much commands
already use switch-to-buffer.

> If the default value isn't changed, maybe other-frame-prefix
> should let bind it to t since if you're using it you presumably
> want a new frame.  Same for the window and tab variants.
> project.el seems to do this in project--other-place-command
> which the project-other-{frame,window,tab}-commands use.

I'm not sure if the default value can be changed,
but you are right about other-frame-prefix.
I didn't know that project--other-place-command
let binds it to t.  But doing the same is not possible
in other-frame-prefix, that just sets a display action
for the next command.  So a more elaborate fix is required:

diff --git a/lisp/window.el b/lisp/window.el
index 1b8fe2b262..eba888a89d 100644
--- a/lisp/window.el
+++ b/lisp/window.el
@@ -8931,6 +8931,7 @@ display-buffer-override-next-command
   (let* ((old-window (or (minibuffer-selected-window) (selected-window)))
          (new-window nil)
          (minibuffer-depth (minibuffer-depth))
+         (obey-display switch-to-buffer-obey-display-actions)
          (clearfun (make-symbol "clear-display-buffer-overriding-action"))
          (postfun (make-symbol "post-display-buffer-override-next-command"))
          (action (lambda (buffer alist)
@@ -8955,6 +8956,7 @@ display-buffer-override-next-command
               (funcall post-function old-window new-window)))))
     (fset clearfun
           (lambda ()
+            (setq switch-to-buffer-obey-display-actions obey-display)
             (setcar display-buffer-overriding-action
                     (delq action (car display-buffer-overriding-action)))))
     (fset postfun
@@ -8971,6 +8973,7 @@ display-buffer-override-next-command
     (add-hook 'post-command-hook postfun)
     (when echofun
       (add-hook 'prefix-command-echo-keystrokes-functions echofun))
+    (setq switch-to-buffer-obey-display-actions t)
     (push action (car display-buffer-overriding-action))
     exitfun))