> WIP patch attached with a test and some few refinements we've talked about
> in this dialog. I didn't alter tab-bar-mode to tab-bar-lines as Martin
> suggested. You're the expert.
We don't need a new unusable option, so please remove it and submit a new patch.
Also please replace tab-bar-mode with tab-bar-lines like Martin suggested.
Then everything should be good. Also it seems you forgot to remove
window-dedicated-p in your previous patch.
I'll work on that now. I'll remove 'window-delete-active-tabs-inhibit-delete-frame'. 'window-dedicated-p' condition now gone.
Are you sure you don't want this to support the case where tab-bar-mode is active and tabs merely aren't visible?
There's also 'tab-bar--tab-bar-lines-for-frame' if you think that's more appropriate.
All tests pass unless I set tab-bar-show nil, and I still think this patch should work even if the tab-bar is hidden, but tab-bar-mode is enabled.