Re: new buffer display action: display-buffer-reuse-frame

[martin rudalics <rudalics@gmx.at>]

 > I'd like to add display-buffer-reuse-frame to window.el:

This would be a misnomer.  `display-buffer-reuse-window' takes a window
that already shows the buffer and `display-buffer-reuse-frames', albeit
obsolete, meant a similar thing.  `display-buffer-use-some-frame' could
be used.

 > This is an alternative to display-buffer-pop-up-frame. I have a couple
 > of use cases for it, both based on the premise that there are normally
 > two Emacs frames open. This allows other applications to temporarily
 > cover one of the frames while still allowing Emacs to be in the
 > foreground. It also provides another level of buffer placement control.
 >
 > - Using ediff to review a file for a commit. There are now three frames;
 >    the ediff control frame, the frame containing the old and current file
 >    versions under ediff control, and another frame. The user wants to put
 >    the log edit buffer in the other frame; they specify
 >    display-buffer-reuse-frame as the action, with a frame predicate that
 >    excludes the two ediff frames.
 >
 > - User would like to move a buffer to the other frame. For instance,
 >    they just used M-. to find the definition of an elisp function, and
 >    they'd like to return to the use of the function, while keeping the
 >    definition visible. They specify display-buffer-reuse-frame as the
 >    action.
 >
 > Thoughts?

I think you should add it (together with appropriate NEWS and elisp
manual entries).

martin