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Re: What is a default font?
From: |
martin rudalics |
Subject: |
Re: What is a default font? |
Date: |
Sat, 7 Dec 2019 10:39:00 +0100 |
>> (not (string-equal (frame-parameter frame 'font) default-font)))
>> (aref (font-info default-font frame) 3))
>
> Not sure I get the logic here: you use default-font if the frame's
> font is NOT the default-font?
I simply reused the specification from 'default-font-height' here with
FRAME specifying some frame, not necessarily the selected one.
;; Avoid calling font-info if the frame's default font was
;; not changed since the frame was created. That's because
;; font-info is expensive for some fonts, see bug #14838.
(not (string= (frame-parameter nil 'font) default-font)))
(aref (font-info default-font) 3))
Do you see anything wrong with that?
>> And I'd still like to know what 'face-new-frame-defaults' is really
>> used for.
>
> The commentary at the beginning of xfaces.c says:
>
> There is also a global face alist `Vface_new_frame_defaults'. Face
> definitions from this list are used to initialize faces of newly
> created frames.
>
> If this is unclear, please ask more specific questions.
This variable has 258 x 21 elements all of them unspecified starting
like this here:
((custom-group-subtitle .
[face unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified])
(custom-group-tag .
[face unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified])
(custom-group-tag-1 .
[face unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified])
(custom-face-tag .
[face unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified unspecified unspecified unspecified unspecified unspecified
unspecified])
...
No matter what I do, the elements of each entry are to the best of my
knowledge nowhere changed and nowhere "really" used ('face-list' just
using the cars only).
The one potential use case I've seen (and obviously the use case that
would have interested me) is, when calling 'face-font' with the second
argument t in which case it calls lface_from_face_name with the first
argument NULL which then calls lface_from_face_name_no_resolve which
consults Vface_new_frame_defaults which, however, does never return
anything useful. So the return value of 'face-font' is always nil
when the second argument is t.
So the specific question I ask is whether it makes sense to maintain
such a large variable that apparently never provides anything useful.
martin
- Re: What is a default font?, (continued)
- Re: What is a default font?, Eli Zaretskii, 2019/12/05
- Re: What is a default font?, Stefan Monnier, 2019/12/04
- Re: What is a default font?, martin rudalics, 2019/12/05
- Re: What is a default font?, Eli Zaretskii, 2019/12/05
- Re: What is a default font?, martin rudalics, 2019/12/05
- Re: What is a default font?, Eli Zaretskii, 2019/12/05
- Re: What is a default font?, martin rudalics, 2019/12/05
- Re: What is a default font?, Eli Zaretskii, 2019/12/05
- Re: What is a default font?, martin rudalics, 2019/12/06
- Re: What is a default font?, Eli Zaretskii, 2019/12/06
- Re: What is a default font?,
martin rudalics <=
- Re: What is a default font?, Eli Zaretskii, 2019/12/07
- Re: What is a default font?, Eli Zaretskii, 2019/12/06
- Re: What is a default font?, martin rudalics, 2019/12/07
- Re: What is a default font?, Eli Zaretskii, 2019/12/07
- Re: What is a default font?, martin rudalics, 2019/12/08
- Re: What is a default font?, Eli Zaretskii, 2019/12/08