Re: "Final" version of tty child frames

[Feng Shu]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

Will the below interfaces changed?

1. tty-child-frames
2. tty-non-selected-cursor
3. undecorated

If not, I have updated posframe, vertico-posframe and ivy-posframe to
support three interfaces.


> I have (re-)created the scratch/tty-child-frames branch today, which
> contains the code for child frames on ttys, based on a recent master.
>
> I'm a happy user of this for a while now with corfu, vertico +
> vertico-posframe + consult, transient + transient-posframe,
> which-key + which-key-posframe. And my current todo list is now empty,
> so here it is.
>
> To use it, redefine these two functions:
>
> #+begin_src emacs-lisp
> (defun posframe-workable-p ()
>   "Test posframe workable status."
>   (and (>= emacs-major-version 26)
>        (not (or noninteractive
>                 emacs-basic-display
>                 (or (featurep 'tty-child-frames)
>                     (not (display-graphic-p)))
>                 (eq (frame-parameter (selected-frame) 'minibuffer) 
> 'only)))))))
>
> (cl-defgeneric corfu--popup-support-p ()
>   "Return non-nil if child frames are supported."
>   (or (display-graphic-p)
>       (featurep 'tty-child-frames)))
> #+end_src
>
>
> To make things look nicer you might also want to
>
> #+begin_src emacs-lisp
> (push '(tty-non-selected-cursor . t) vertico-posframe-parameters)
> (push '(undecorated . nil) vertico-posframe-parameters))
> (push '(undecorated . nil) transient-posframe-parameters))
> #+end_src
>
> The 'undecorated' frame parameter lets Emacs draw a border around the
> child frame (default is no border). The tty-non-selected-cursor
> parameter makes redisplay put the terminal cursor in a non-selected
> frame which I find nice for things like consult-buffer. Which is why I
> added it :-).
>
> What's there fits my personal needs entirely. I am not interested in
> full support of child frames as they exist on window systems because I
> don't see child frames being used except for things like posframe and
> corfu and similar. And, TBH, I don't find the tty frame code fun to
> work with.
>
> Other things not contained:
>
> - Support for anything but termcap frames. I bet I broke MSDOS.
> - Mouse support except with xterm-mouse-mode (no GPM).
> - Drawing borders like it is normally done (internal border and so
>   on). Tried that once, git reset --hard, won't happen.
> - Tooltips. I think tooltips could relatively easily be implemented
>   with child frames by copying or extracting the non-native tooltip
>   code from x-show-tip or some such. From my POV, that would be best
>   done by refactoring the tooltip code across window systems which I
>   can't do.
> - Documentation. Would only make sense to write if this goes into GNU,
>   which might or might not happen, depending on, from my side, how
>   much work that is.
>
> Disclaimer: As I mentioned already in other contexts, I don't want to
> be the maintainer of anything, for personal reasons.
>
> Have fun!
>
>

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