Re: master bf0aeaa0d7a: Re-enable displaying `han' characters on Android

[Po Lu <luangruo@yahoo.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Po Lu <luangruo@yahoo.com>
>> Cc: emacs-devel@gnu.org
>> Date: Thu, 01 Aug 2024 08:33:46 +0800
>> 
>> Po Lu <luangruo@yahoo.com> writes:
>> 
>> > It does affect other platforms, but I'm only in the habit of installing
>> > master regularly on Android.
>> 
>> In the event, this was not completely accurate.  I've specialized some
>> generic code to Android that was enabled for all systems by accident,
>> rendering this matter moot, as `script-representative-chars' should not
>> have been consulted on other systems at the outset.
>
> I don't understand the changes you installed.  The comments and the
> log message don't tell enough, and you have again installed the
> changes before discussing them, although I explicitly asked you not to
> do that.
>
> I see the changes in fontset setup related to 'han', which make them
> specific to Android.  But the representative characters _are_ used on
> other systems, at least on MS-Windows (and AFAIU on other systems as
> well: see ftfont.c and font.c).  So why you again removed the SMP
> characters from the list is not clear to me; I think it's a mistake
> and tend to revert that part.

No font-spec in the default fontset now specifies the `han' script on
these systems, as in Emacs 29, so that `script-representative-chars' is
no longer consulted in connection with it.  What is specified is QClang,
which is tested against font metadata (e.g., the design language) rather
than character repertories.