bug#68339: [patch] Set the IME window font to an appropriate size

Thanks to Eli for the guidance — I had no idea about the `face-remap`
mechanism. I'm planning to work on fixing more Windows-related issues in
Emacs going forward.

Eli Zaretskii <[email protected]> 于2026年8月16日周日 17:42写道：

> > From: Eason Huang <[email protected]>
> > Cc: Eli Zaretskii <[email protected]>,  [email protected]
> > Date: Sat, 15 Aug 2026 21:03:29 +0800
> >
> > dANiuu zHaO <[email protected]> writes:
> >
> > > [PATCH 5] Set the IME window font to an appropriate size
> > >
> > > Added a check for face->font so that it can fall back to FRAME_FONT.
> > > If any issues are found during testing, please feel free to contact me.
> > >
> > > dANiuu zHaO <[email protected]> 于2026年8月7日周五 13:53写道：
> > >
> > >  Yes, it does need some time for people to test it. My copyright
> assignment paperwork has been signed, but I haven't heard back yet.
> > >
> > >  As for the code, I will set up `face->fallback` later. I honestly
> didn't expect `face->font` could return NULL.
> > >
> > >  Eli Zaretskii <[email protected]> 于2026年8月7日周五 13:45写道：
> > >
> > >  > From: dANiuu zHaO <[email protected]>
> > >  > Date: Fri, 7 Aug 2026 11:36:41 +0800
> > >  > Cc: Eason Huang <[email protected]>, [email protected]
> > >  >
> > >  > @@ -6682,6 +6686,8 @@ w32_draw_window_cursor (struct window *w,
> struct glyph_row *glyph_row,
> > >  >           + WINDOW_HEADER_LINE_HEIGHT (w);
> > >  >         w32_system_caret_mode_height = WINDOW_MODE_LINE_HEIGHT (w);
> > >  >
> > >  > +       w32_system_remap_font = face ? face->font : FRAME_FONT (f);
> > >
> > >  face->font can yield NULL in some rare cases, so there's another
> > >  face->fallback missing here, to use FRAME_FONT in that case as well.
> > >
> > >  Otherwise, I think we should wait for a while for people to test this
> > >  patch (and for your copyright-assignment paperwork), before we install
> > >  it.
> > >
> > >  Thanks.
> > >
> > >
> >
> > Hello Eli and dANiuu,
> >
> > I have tested the latest patch on my Windows machine with Windows 11.
> > It works very well, no crash anymore.
>
> Thanks, now installed on the master branch, and closing the bug.
>