bug#71386: 29.1; Frame is auto-deleted even when it has multiple tabs

[Eli Zaretskii <eliz@gnu.org>]

> From: Juri Linkov <juri@linkov.net>
> Cc: Al Haji-Ali <abdo.haji.ali@gmail.com>,  martin rudalics
>  <rudalics@gmx.at>,  71386@debbugs.gnu.org
> Date: Thu, 06 Jun 2024 09:12:10 +0300
> 
> >> If I open a frame with multiple tabs, and one of the tabs has
> >> a dedicated window, then kill the buffer with the dedicated window,
> >> the frame is deleted along with its tabs.
> >> 
> >> I understand that this is the documented behaviour, however my
> >> expectation is that the tab should be deleted but the frame should
> >> stay when other tabs are available, similar to how the frame is not
> >> deleted if other windows are visible.
> >
> > I'm not sure I agree with you.  Tabs are just saved frame
> > configurations, they are not real windows.  If we make this behavior
> > dependent on tab-bar-mode, we basically introduce an incompatible
> > behavior change in this particular case, which people and Lisp
> > programs out there might not expect or like.
> >
> > I'm adding Juri and Martin to this discussion.
> 
> I don't understand the logic of window--delete.  But maybe
> window-deletable-p should also check for existing tabs in tab-bar-mode
> and return 'tab' instead of 'frame'.  Then window--delete
> could close the tab instead of deleting the frame.

Sure, technically it should not be hard to make this change.  I just
am not sure we should.  Martin, WDYT?