From: Philipp Stephani <p.stephani2@gmail.com>
To: Keith David Bershatsky <esq@lawlist.com>,
Emacs Devel <emacs-devel@gnu.org>
Subject: Re: C equivalent for: (face-attribute 'region :background (selected-frame) 'default)
Date: Tue, 26 Sep 2017 18:46:05 +0000 [thread overview]
Message-ID: <CAArVCkQpTXPP7Cw7DmZqpshRoOJRqM8AyMgp1fcSL_AiWaoQ7g@mail.gmail.com> (raw)
In-Reply-To: <m2bmly6pn4.wl%esq@lawlist.com>
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Keith David Bershatsky <esq@lawlist.com> schrieb am Di., 26. Sep. 2017 um
06:38 Uhr:
> I am working on implementing my own feature requests to draw crosshairs
> (#17684) using multiple fake cursors (#22873), and I am trying to quickly
> convert (in C) the :background of the region face into a string -- e.g.,
> "blue" or "#0000FF". My goal is to do all of this in C, and I would like
> to avoid porting (rewriting) several Lisp functions to give me the result
> of:
>
> (face-attribute 'region :background (selected-frame) 'default)
>
> Is there anything built-in into the Emacs C code base that already does
> this, or *almost* does this ...?
>
You can easily call Lisp functions from C.
// In syms_of_...
DEFSYM (Qface_attribute, "face-attribyte");
DEFSYM (Qregion, "region");
DEFSYM (QCbackground, ":background");
DEFSYM (Qdefault, "default");
// Calling
Lisp_Object o = CALLN (Ffuncall, Qface_attribute, Qregion, QCbackground,
Fselected_frame (), Qdefault);
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next prev parent reply other threads:[~2017-09-26 18:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-26 4:38 C equivalent for: (face-attribute 'region :background (selected-frame) 'default) Keith David Bershatsky
2017-09-26 18:46 ` Philipp Stephani [this message]
2017-09-26 23:19 ` YAMAMOTO Mitsuharu
-- strict thread matches above, loose matches on Subject: below --
2017-09-26 18:38 Keith David Bershatsky
2017-09-29 13:25 ` Eli Zaretskii
2017-09-26 22:06 Keith David Bershatsky
2017-09-26 22:11 Keith David Bershatsky
2017-09-29 20:33 ` Philipp Stephani
2017-09-27 0:24 Keith David Bershatsky
2017-09-27 5:58 ` YAMAMOTO Mitsuharu
2017-10-05 0:24 Keith David Bershatsky
2017-10-05 6:47 ` Eli Zaretskii
2017-10-05 7:11 ` YAMAMOTO Mitsuharu
2017-10-06 3:53 Keith David Bershatsky
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