Re: src/nsterm.m: fix window tabbing on macOS

[Paul W. Rankin]

> On 7 Jun 2021, at 2:52 am, naofumi@yasufuku.dev wrote:
> 
> After this nsterm.m change for native tabs, I cannot realize the previous
> fullscreen frame behavior with macOS system preference 'Prefer tabs' settings.
> 
> 
> I think this native tabs feature should be choosable by user, as Alan said:

*It is* choosable by the user, via System Preferences. Please see the original 
discussion here:

> There are three positions someone could take:
> 
> 1. wants tabs in all macOS apps including Emacs.app
> 2. does not want tabs in any macOS apps including Emacs.app
> 3. wants tabs in all other macOS except for Emacs.app
> 
> Anyone in categories 1 and 2 will be covered by the option in System 
> Preferences. Given that all I think we're doing here is removing old barrier 
> code to have Emacs function with an OS's native window manager, anyone in the 
> third category would be putting the onus on themselves to write code for 
> additional functionality.

If you fall into the last category you cannot expect that the commit is 
reverted thus prohibiting every other person (including me) from using the 
native tabs just because you want some esoteric behaviour.

What should have been clear from the discussion is that achieving optimal 
native tab behaviour on macOS is going to be a *multi-step process*. This is 
just the first step. You are of course welcome to submit your own patches in 
the continuation of this process.