GNU bug report logs - #75056
31.0.50; tty-child-frames with server / multiple clients possible hangs

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From: martin rudalics <rudalics <at> gmx.at>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, lenbok <at> gmail.com, 75056 <at> debbugs.gnu.org
Subject: bug#75056: 31.0.50; tty-child-frames with server / multiple clients possible hangs
Date: Tue, 28 Jan 2025 12:01:19 +0100

>> The root_frame of the old top frame is the old top frame itself.  Or am
>> I missing something?
>
> Maybe. Make a child with M-l, then in the child
>
>    (frame-parent (tty-top-frame)
>    => F1
>
> It's 1:1 the display info's top_frame. IOW, I left the setting of
> top_frame as is was before, only that there are now child frames to
> which it gets set.

What I meant was that currently with

(setq F1 (selected-frame))
(setq F2 (make-frame))
(next-frame)
(frame-visible-p F1)

the last form evaluates to t.  But if we change 'frame-visible-p' to not
always return t if the argument frame is a tty frame, the above will
give nil IIUC.  And that's not what happens on a GUI.

>> I think we should use the metaphor of a top frame on a tty as that of a
>> maximized frame on a GUI.  Such a frame hides all other normal frames on
>> that workspace but does not render them invisible or iconified (I ignore
>> z-order and groups here).
>
> That's not so in the current code. And why should it be so complicated?
> Either I can see a frame or not.

Be aware that it will change the current behavior for top frames and
make tty frame handling different from what it is on a GUI.

> It's much easier for me to think about if this second concept of being
> obscured does not exist. And it's easier in redisplay: If it's visible
> display it, otherwise don't.

The question is not whether to display it if it's not visible.  The
question is whether Lisp code should consider it as visible.

martin

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