GNU bug report logs - #29630
25.3; Unable to change fontset using :family face attribute

Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.

Package: emacs; Reported by: Thomas Morgan <tlm@HIDDEN>; dated Sat, 9 Dec 2017 21:41:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

Message received at 29630 <at> debbugs.gnu.org:


Received: (at 29630) by debbugs.gnu.org; 27 Dec 2017 12:33:24 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Wed Dec 27 07:33:24 2017
Received: from localhost ([127.0.0.1]:53187 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1eUAtg-0002Ns-4M
	for submit <at> debbugs.gnu.org; Wed, 27 Dec 2017 07:33:24 -0500
Received: from eggs.gnu.org ([208.118.235.92]:49882)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <handa@HIDDEN>) id 1eUAtd-0002Nd-TC
 for 29630 <at> debbugs.gnu.org; Wed, 27 Dec 2017 07:33:22 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <handa@HIDDEN>) id 1eUAtX-0008Ii-EX
 for 29630 <at> debbugs.gnu.org; Wed, 27 Dec 2017 07:33:16 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,T_RP_MATCHES_RCVD
 autolearn=disabled version=3.3.2
Received: from fencepost.gnu.org ([2001:4830:134:3::e]:37141)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <handa@HIDDEN>)
 id 1eUAtS-0008AP-20; Wed, 27 Dec 2017 07:33:10 -0500
Received: from fl1-119-240-91-176.iba.mesh.ad.jp ([119.240.91.176]:42154
 helo=shatin)
 by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128)
 (Exim 4.82) (envelope-from <handa@HIDDEN>)
 id 1eUAtR-0005te-F5; Wed, 27 Dec 2017 07:33:09 -0500
Received: from handa by shatin with local (Exim 4.86_2)
 (envelope-from <handa@HIDDEN>)
 id 1eUAtM-00007N-SN; Wed, 27 Dec 2017 21:33:04 +0900
From: handa <handa@HIDDEN>
To: Thomas Morgan <tlm@HIDDEN>
Subject: Re: bug#29630: 25.3;
 Unable to change fontset using :family face attribute
In-Reply-To: <87zi68elz1.fsf@HIDDEN> (message from Thomas Morgan on Sat,
 23 Dec 2017 21:25:22 -0800)
Date: Wed, 27 Dec 2017 21:33:04 +0900
Message-ID: <87wp18gxkv.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
X-Received-From: 2001:4830:134:3::e
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: 29630
Cc: 29630 <at> debbugs.gnu.org, eliz@HIDDEN
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

In article <87zi68elz1.fsf@HIDDEN>, Thomas Morgan <tlm@HIDDEN> writes:

> `:font'
>      [...] If you specify a string, the contents of the string should
>      be a font name (*note (emacs)Fonts::); if the font name is an XLFD
>      containing wildcards, Emacs chooses the first font matching those
>      wildcards. [...]

> Would it make sense to add the following after the quoted sentence?

>   You may also specify a fontset name as a string.  For reasons of
>   backward compatibility, in the case of the `default' face this may
>   automatically generate a new fontset based on the family, weight,
>   size, and other font-related properties of the specified fontset.

The generation of a new fontset happens every time you change a font of
the default face; not only when you specify a fontset for :font.

So, here, as an explanation of :font, I think what we have to say is that
specifying a fontset name is the same as specifying a font that the
fontset defines for ASCII.  For instance,

Even if yoy create a fontset as this name:
  (create-fontset-from-fontset-spec
   "-*-dejavu sans mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-dejavu")
when you do:
  (set-fontset-font "fontset-dejavu" 'unicode-bmp (font-spec :family "Freemono"))
giving "fontset-dejavu" to :font is the same as giving
  (font-spec :family "Freemono").

> It would probably also be helpful to document the :fontset attribute
> in the manual, if that's the proper way to specify a fontset for the
> the frame's default face.

I don't remember how :fontset attribute works here, sorry. :-(
I tried:
  (set-face-attribute 'default nil :fontset "fontset-dejavu")
but it seems that it has no effect?!?

On the other hand,
  (modify-frame-parameters nil '((font . "fontset-dejavu")))
works.

> > At least, calling set-fontset-font for the fontset of the current frame
> > should work... and worked as far as I rememnber... but I've just found
> > that this does not work with the latest Emacs?!?
> >
> > (set-fontset-font nil 'unicode-bmp "dejavu sans mono")
> > (set-fontset-font nil 'unicode-bmp "Freemono" nil 'append)
> >
> > I'm now checking what is wrong.

That was my misunderstanding, sorry.  I have two versions of freemono
fonts, ttf and otf, and Emacs (or fontconfig) found otf version, but I
was expecting ttf version that has more glyphs.

---
K. Handa
handa@HIDDEN




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#29630; Package emacs. Full text available.

Message received at 29630 <at> debbugs.gnu.org:


Received: (at 29630) by debbugs.gnu.org; 24 Dec 2017 05:25:34 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Sun Dec 24 00:25:33 2017
Received: from localhost ([127.0.0.1]:49856 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1eSymz-0000A5-L7
	for submit <at> debbugs.gnu.org; Sun, 24 Dec 2017 00:25:33 -0500
Received: from mail-io0-f182.google.com ([209.85.223.182]:32840)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <tlm@HIDDEN>) id 1eSymy-00009t-Dj
 for 29630 <at> debbugs.gnu.org; Sun, 24 Dec 2017 00:25:32 -0500
Received: by mail-io0-f182.google.com with SMTP id t196so28323761iof.0
 for <29630 <at> debbugs.gnu.org>; Sat, 23 Dec 2017 21:25:32 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=ziiuu-com.20150623.gappssmtp.com; s=20150623;
 h=from:to:cc:subject:references:date:in-reply-to:message-id
 :user-agent:mime-version:content-transfer-encoding;
 bh=PYZUGe2m/Ybc+YnhW4Yxbu1zs7HxZkVJPBeYbioTfJc=;
 b=nzKb8VnWgTDMfM7HuDKjequ35fTD3Bd0rz1BZ2VYYCJptQrd9133fx9vTyjsVfwZfW
 6cECF928w4/BGNlS+m6YvtDonYTPf3YfhXvvMiWppbZpHZw2G01M2rhk9hNpNOE+kJiJ
 70WJb8cJc13gtvQTYuQ8kqLGjB5Bi9uR6MDmZa8Wm5PMNMVNJXUdqo/fkERixauDkjlb
 oNA2HxCquM6cTUsvyPcpHzLtgjgcHxAc6oFIR56NvzGMO+1tEeeRgJ7okd0IJKKERO5V
 m7WLluP7bTYW7fDFB9m5m8HV2qC1DiKbU9QIrWH25905Zx7pKe5SLgLPOEwk2j3nW3p8
 EQbw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:from:to:cc:subject:references:date:in-reply-to
 :message-id:user-agent:mime-version:content-transfer-encoding;
 bh=PYZUGe2m/Ybc+YnhW4Yxbu1zs7HxZkVJPBeYbioTfJc=;
 b=kYQVHE6ov6BQ/OnySnCFs7EinUCMHWs+nMWVBW8DoyTwHoFzcev6/g7LIlgLDvM+YW
 oRlKu6aEzef+owBly1bfMXpJBdYaREwYFuRBhilfSqNN+fCsgTul8AMVeLbWOaS135kT
 pHGLnMILMFPiNbs6+p0vdx8P1DpF3WaBfOwC3x14Ij5JghKrUWETBU1rDUxfn4WZBi2N
 CHmRI09sT5JeEJOfMLkeLSs0G6xo0XlvBX6q0fkjm53bNVtb3zqr75MmaRuZHL3ciDLR
 NLFfRjBRz7vdnkVdyyvwVtNOIGseiXagi+UfWaPcbqiU4kgiS60ZzDhLIEZOfzU3tEo9
 WrMA==
X-Gm-Message-State: AKGB3mKyvvQmI6KnitCjzHxqnXnOYyEt3S7c6gxQa+L8N+xu4J76TkYf
 CDoSRLbPD8huxz4NmheTtQFs1NXw
X-Google-Smtp-Source: ACJfBovgZgM/VhM6S98hWX35cfwMzP5v2JZ3XE3mMtsh2foFFHS6Q2ThtjqwaLWRjmlGEl8ISXfkkw==
X-Received: by 10.107.160.145 with SMTP id j139mr23400370ioe.236.1514093126473; 
 Sat, 23 Dec 2017 21:25:26 -0800 (PST)
Received: from sadr.localdomain
 (ip-9-214-239-173.east.us.northamericancoax.com. [173.239.214.9])
 by smtp.gmail.com with ESMTPSA id a69sm7521398itc.18.2017.12.23.21.25.24
 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Sat, 23 Dec 2017 21:25:24 -0800 (PST)
Received: by sadr.localdomain (Postfix, from userid 1000)
 id 25EF1280931; Sat, 23 Dec 2017 21:25:22 -0800 (PST)
From: Thomas Morgan <tlm@HIDDEN>
To: handa <handa@HIDDEN>
Subject: Re: bug#29630: 25.3;
 Unable to change fontset using :family face attribute
References: <87d1382jnv.fsf@HIDDEN>
Date: Sat, 23 Dec 2017 21:25:22 -0800
In-Reply-To: <87d1382jnv.fsf@HIDDEN> (handa@HIDDEN's message of "Fri, 22 Dec
 2017 00:19:16 +0900")
Message-ID: <87zi68elz1.fsf@HIDDEN>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
X-Spam-Score: 0.0 (/)
X-Debbugs-Envelope-To: 29630
Cc: 29630 <at> debbugs.gnu.org, Eli Zaretskii <eliz@HIDDEN>
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: 0.0 (/)

handa <handa@HIDDEN> writes:

> Here, fontset works as just a provider of font-related properties
> (family, weight, size, etc), and then, based on the selected font, a new
> fontset is automatically created.  This roundabout behavior was not to
> break (Emacs-internal) backward compatibility by introducing the concept
> of fontset.

Thank you, Handa-san.

(elisp)Face Attributes says this:

`:font'
     [...] If you specify a string, the contents of the string should
     be a font name (*note (emacs)Fonts::); if the font name is an XLFD
     containing wildcards, Emacs chooses the first font matching those
     wildcards. [...]

Would it make sense to add the following after the quoted sentence?

  You may also specify a fontset name as a string.  For reasons of
  backward compatibility, in the case of the `default' face this may
  automatically generate a new fontset based on the family, weight,
  size, and other font-related properties of the specified fontset.

It would probably also be helpful to document the :fontset attribute
in the manual, if that's the proper way to specify a fontset for the
the frame's default face.

> At least, calling set-fontset-font for the fontset of the current frame
> should work... and worked as far as I rememnber... but I've just found
> that this does not work with the latest Emacs?!?
>
> (set-fontset-font nil 'unicode-bmp "dejavu sans mono")
> (set-fontset-font nil 'unicode-bmp "Freemono" nil 'append)
>
> I'm now checking what is wrong.

This seems to work for me with Emacs 25.3.1.  To test it I started Emacs
with `emacs -Q' and evaluated this in *scratch*:

(progn
  (set-fontset-font nil 'unicode-bmp "DejaVu Sans Mono")
  (set-fontset-font nil 'unicode-bmp "FreeMono" nil 'append)
  (list (font-at 0 nil "G") (font-at 0 nil "=E2=85=81")))

(The second character is TURNED SANS-SERIF CAPITAL G, which is covered
by FreeMono but not by DejaVu Sans Mono.)

As expected, this was displayed in the echo area:

(#<font-object "-PfEd-DejaVu Sans Mono-normal-normal-normal-*-15-*-*-*-m-0-=
iso10646-1">
 #<font-object "-GNU -FreeMono-normal-normal-normal-*-15-*-*-*-m-0-iso10646=
-1">)




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#29630; Package emacs. Full text available.

Message received at 29630 <at> debbugs.gnu.org:


Received: (at 29630) by debbugs.gnu.org; 21 Dec 2017 15:20:21 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Thu Dec 21 10:20:21 2017
Received: from localhost ([127.0.0.1]:46294 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1eS2dx-0008FS-1t
	for submit <at> debbugs.gnu.org; Thu, 21 Dec 2017 10:20:21 -0500
Received: from eggs.gnu.org ([208.118.235.92]:43118)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <handa@HIDDEN>) id 1eS2dv-0008FG-BD
 for 29630 <at> debbugs.gnu.org; Thu, 21 Dec 2017 10:20:19 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <handa@HIDDEN>) id 1eS2dP-0000NE-Ur
 for 29630 <at> debbugs.gnu.org; Thu, 21 Dec 2017 10:20:13 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,T_RP_MATCHES_RCVD
 autolearn=disabled version=3.3.2
Received: from fencepost.gnu.org ([2001:4830:134:3::e]:55113)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <handa@HIDDEN>)
 id 1eS2d1-0008IO-16; Thu, 21 Dec 2017 10:19:23 -0500
Received: from fl1-119-240-91-176.iba.mesh.ad.jp ([119.240.91.176]:40132
 helo=shatin)
 by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128)
 (Exim 4.82) (envelope-from <handa@HIDDEN>)
 id 1eS2d0-0000Av-Hj; Thu, 21 Dec 2017 10:19:22 -0500
Received: from handa by shatin with local (Exim 4.86_2)
 (envelope-from <handa@HIDDEN>)
 id 1eS2cu-00051g-C2; Fri, 22 Dec 2017 00:19:16 +0900
From: handa <handa@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#29630: 25.3;
 Unable to change fontset using :family face attribute
In-Reply-To: <83fu8its1h.fsf@HIDDEN> (message from Eli Zaretskii on Sun,
 10 Dec 2017 19:24:26 +0200)
Date: Fri, 22 Dec 2017 00:19:16 +0900
Message-ID: <87d1382jnv.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
X-Received-From: 2001:4830:134:3::e
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: 29630
Cc: 29630 <at> debbugs.gnu.org, tlm@HIDDEN
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

> > From: Thomas Morgan <tlm@HIDDEN>
> > Date: Sat, 09 Dec 2017 16:26:48 -0500
> > 
> > The documentation for the :font attribute doesn't say that it can 
> > be a fontset.  But (elisp)Font and Color Parameters says the `font'
> > frame parameter can be the name of a fontset and the frame parameter 
> > is "equivalent to the `font' attribute of the `default' face".  So 
> > one can infer that the :font attribute of a face can be a fontset 
> > name.  I tested this:
> > 
> >   (progn
> >     (set-face-attribute 'default nil :font
> >                         "-*-liberation mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation")
> >     (font-at 0 nil "a"))
> > 
> > This changes the font to Liberation Mono as expected:
> > 
> >   #<font-object "-1ASC-Liberation Mono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1">
> > 
> > I also tried equivalent expressions with set-face-font and
> > using the fontset alias, all of which succeeded.
> > 
> > The font is correct but the fontset is actually fontset-auto1, 
> > not fontset-liberation.

Here, fontset works as just a provider of font-related properties
(family, weight, size, etc), and then, based on the selected font, a new
fontset is automatically created.  This roundabout behavior was not to
break (Emacs-internal) backward compatibility by introducing the concept
of fontset.

At least, calling set-fontset-font for the fontset of the current frame
should work... and worked as far as I rememnber... but I've just found
that this does not work with the latest Emacs?!?

(set-fontset-font nil 'unicode-bmp "dejavu sans mono")
(set-fontset-font nil 'unicode-bmp "Freemono" nil 'append)

I'm now checking what is wrong.

---
K. Handa
handa@HIDDEN




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#29630; Package emacs. Full text available.

Message received at 29630 <at> debbugs.gnu.org:


Received: (at 29630) by debbugs.gnu.org; 10 Dec 2017 17:24:54 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Sun Dec 10 12:24:54 2017
Received: from localhost ([127.0.0.1]:55551 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1eO5LS-0001FD-6j
	for submit <at> debbugs.gnu.org; Sun, 10 Dec 2017 12:24:54 -0500
Received: from eggs.gnu.org ([208.118.235.92]:40067)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <eliz@HIDDEN>) id 1eO5LQ-0001F1-0e
 for 29630 <at> debbugs.gnu.org; Sun, 10 Dec 2017 12:24:52 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <eliz@HIDDEN>) id 1eO5LK-0006aY-4C
 for 29630 <at> debbugs.gnu.org; Sun, 10 Dec 2017 12:24:46 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_05,T_RP_MATCHES_RCVD
 autolearn=disabled version=3.3.2
Received: from fencepost.gnu.org ([2001:4830:134:3::e]:50530)
 by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <eliz@HIDDEN>)
 id 1eO5LG-0006Xc-9V; Sun, 10 Dec 2017 12:24:42 -0500
Received: from [176.228.60.248] (port=2325 helo=home-c4e4a596f7)
 by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256)
 (Exim 4.82) (envelope-from <eliz@HIDDEN>)
 id 1eO5LF-0006vl-Na; Sun, 10 Dec 2017 12:24:42 -0500
Date: Sun, 10 Dec 2017 19:24:26 +0200
Message-Id: <83fu8its1h.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Thomas Morgan <tlm@HIDDEN>, Kenichi Handa <handa@HIDDEN>
In-reply-to: <871sk3twx3.fsf@HIDDEN> (message from Thomas Morgan on Sat, 09
 Dec 2017 16:26:48 -0500)
Subject: Re: bug#29630: 25.3;
 Unable to change fontset using :family face attribute
References: <871sk3twx3.fsf@HIDDEN>
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
X-Received-From: 2001:4830:134:3::e
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: 29630
Cc: 29630 <at> debbugs.gnu.org
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Reply-To: Eli Zaretskii <eliz@HIDDEN>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

> From: Thomas Morgan <tlm@HIDDEN>
> Date: Sat, 09 Dec 2017 16:26:48 -0500
> 
> The documentation for the :font attribute doesn't say that it can 
> be a fontset.  But (elisp)Font and Color Parameters says the `font'
> frame parameter can be the name of a fontset and the frame parameter 
> is "equivalent to the `font' attribute of the `default' face".  So 
> one can infer that the :font attribute of a face can be a fontset 
> name.  I tested this:
> 
>   (progn
>     (set-face-attribute 'default nil :font
>                         "-*-liberation mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation")
>     (font-at 0 nil "a"))
> 
> This changes the font to Liberation Mono as expected:
> 
>   #<font-object "-1ASC-Liberation Mono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1">
> 
> I also tried equivalent expressions with set-face-font and
> using the fontset alias, all of which succeeded.
> 
> The font is correct but the fontset is actually fontset-auto1, 
> not fontset-liberation.  I'll make another report about that.
> 
> I think the documentation for the :family attribute should be 
> changed to explain how to refer to a fontset if it's possible
> to do that.  If it's not possible to specify a fontset with the
> :family attribute, the text about fontsets should be removed.

Thanks, I've updated the documentation to match what the code does.

I'm CC'ing Handa-san, who might know more about this, and maybe
explain how to fix the code to accept fontsets as value of :family.
Currently, it doesn't seem to work, and I don't know enough about this
to figure out whether it ever did or was supposed to.  This whole area
of Emacs is awfully under-documented.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#29630; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


Received: (at submit) by debbugs.gnu.org; 9 Dec 2017 21:40:29 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Sat Dec 09 16:40:28 2017
Received: from localhost ([127.0.0.1]:54247 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1eNmrE-0004aO-DW
	for submit <at> debbugs.gnu.org; Sat, 09 Dec 2017 16:40:28 -0500
Received: from eggs.gnu.org ([208.118.235.92]:56826)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <tlm@HIDDEN>) id 1eNmeG-0004GZ-Vg
 for submit <at> debbugs.gnu.org; Sat, 09 Dec 2017 16:27:05 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <tlm@HIDDEN>) id 1eNmeA-0003FR-HY
 for submit <at> debbugs.gnu.org; Sat, 09 Dec 2017 16:26:59 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,T_DKIM_INVALID
 autolearn=disabled version=3.3.2
Received: from lists.gnu.org ([2001:4830:134:3::11]:38236)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32)
 (Exim 4.71) (envelope-from <tlm@HIDDEN>) id 1eNmeA-0003Ey-DC
 for submit <at> debbugs.gnu.org; Sat, 09 Dec 2017 16:26:58 -0500
Received: from eggs.gnu.org ([2001:4830:134:3::10]:47796)
 by lists.gnu.org with esmtp (Exim 4.71)
 (envelope-from <tlm@HIDDEN>) id 1eNme8-0003Tp-N3
 for bug-gnu-emacs@HIDDEN; Sat, 09 Dec 2017 16:26:58 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <tlm@HIDDEN>) id 1eNme5-00039r-HI
 for bug-gnu-emacs@HIDDEN; Sat, 09 Dec 2017 16:26:56 -0500
Received: from mail-io0-x236.google.com ([2607:f8b0:4001:c06::236]:38402)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
 (Exim 4.71) (envelope-from <tlm@HIDDEN>) id 1eNme5-00038r-6q
 for bug-gnu-emacs@HIDDEN; Sat, 09 Dec 2017 16:26:53 -0500
Received: by mail-io0-x236.google.com with SMTP id d14so5871360ioc.5
 for <bug-gnu-emacs@HIDDEN>; Sat, 09 Dec 2017 13:26:52 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=ziiuu-com.20150623.gappssmtp.com; s=20150623;
 h=from:to:subject:date:message-id:mime-version;
 bh=GCK8S39chXhuCnGX7nqetWqkufb/pRbNKfkFkXqdzCA=;
 b=IA+lz3J/IrH7eZQHroIhknBL8mPrcVW1UpH4xx8q84f3ALMP46MwH5eRAeCit8R/LF
 oDFq9GFPXbnjLIiBVTbNti15IeLDzzWsJe1edeqObTBp/VWuQUJb8AGNMl1o0Qv6o8mo
 /zNFvE95hW70DY5gJ9ESy+WBYeOVpIafih5UYdbaaTt454fFrWgptGwzTBb1N+U+h5uu
 Cme3rk4c/h57Umk8HF3zenAHTCHq8nKauWKc53hFPGajfJvMAk08Nn8kVnYFHBpWwJ/h
 pwZB7YpzyrTWfpa74exHE/4UNhLiWXYuk05kCh50xIqH7Jfn3cnNsuYyIpHZSieZBobv
 vYVg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:from:to:subject:date:message-id:mime-version;
 bh=GCK8S39chXhuCnGX7nqetWqkufb/pRbNKfkFkXqdzCA=;
 b=IsQTM40tbh5nqoPQwn1uJfgAbz9onfD0+6zEDW0tPU39rJvytP+C3VmUy9z7tLGjBB
 xkesDL7gIjaoDmZ/T3SAollA8189Bm7fODx+0Wtb44HejfsWPE4Dulrv5jNKQI5RT+6P
 h3VqV73PyvTmIRC+nXJh3mfZ9xMg1PzTxZhj86gUnnsBk9QUgDVnOBscqP5wsVNJP9ki
 hPeuiHcXHPrZo53E3Sq3oABar63beuDP3Y5ctfLdsvZ1nIYopyJASxz6rxeQjN6uDqKx
 1y95ZzL9VNHZ3NIdwdPjeP3DICnGC7R08UfypFPtNBEdJc0sonYtNCCx6xbbBuTf+Fa3
 orJQ==
X-Gm-Message-State: AKGB3mJmN8YYrf7RF+BVeUSYjKU68BqflNUiyKMesG1QWXowVEU/YAmf
 FfdGPrz7wJdCX2lKIMN19pY0c8gY
X-Google-Smtp-Source: AGs4zMYuX8pzXsfkr8Nf7Vz0UCfLb6g6IHDNf2VPZJhJLcrRwFMMZ6txgFeq4rIjepgwut2G1NVYBw==
X-Received: by 10.107.182.196 with SMTP id g187mr20523423iof.225.1512854811387; 
 Sat, 09 Dec 2017 13:26:51 -0800 (PST)
Received: from algol.localdomain
 (ip-47-212-239-173.east.us.northamericancoax.com. [173.239.212.47])
 by smtp.gmail.com with ESMTPSA id x97sm2155410ita.9.2017.12.09.13.26.49
 for <bug-gnu-emacs@HIDDEN>
 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Sat, 09 Dec 2017 13:26:49 -0800 (PST)
Received: by algol.localdomain (Postfix, from userid 1000)
 id 344941839B1; Sat,  9 Dec 2017 16:26:48 -0500 (EST)
From: Thomas Morgan <tlm@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 25.3; Unable to change fontset using :family face attribute
Date: Sat, 09 Dec 2017 16:26:48 -0500
Message-ID: <871sk3twx3.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain
X-detected-operating-system: by eggs.gnu.org: Genre and OS details not
 recognized.
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x
X-Received-From: 2001:4830:134:3::11
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: submit
X-Mailman-Approved-At: Sat, 09 Dec 2017 16:40:27 -0500
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

I started Emacs with `emacs -Q' and created a new fontset by entering
the following expression in *scratch* and evaluating it with C-M-x.

  (create-fontset-from-fontset-spec
   "-*-Liberation Mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation")

I wanted to use this as the default font for the frame so I checked
the Emacs Lisp manual.  Section 37.12.1, Face Attributes, explains 
the :family attribute:

  Font family or fontset (a string).  See (emacs)Fonts, for more
  information about font families.  The function `font-family-list'
  (see below) returns a list of available family names.
  See (elisp)Fontsets, for information about fontsets.

According to this, a string representing a fontset can be used
as the value of the :family attribute.

I tried using the fontset alias "fontset-liberation" by evaluating
the following expression in *scratch* as above.

  (progn
    (set-face-attribute 'default nil :family "fontset-liberation")
    (font-at 0 nil "a"))

This changed the frame's font to something other than Liberation Mono
and returned:

  #<font-object "-CYRE-Podkova-normal-normal-normal-*-15-*-*-*-*-0-iso10646-1">

I expected it to be Liberation Mono.

I thought perhaps the problem was that I used the fontset alias
rather than the fontset name, so I tried the fontset name instead:

  (progn
    (set-face-attribute 'default nil :family
                        "-*-liberation mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation")
    (font-at 0 nil "a"))

This signaled an error: "Invalid face foundry".

I checked the manual again and read the sections linked to from the
quote above: (emacs)Fonts and (elisp)Fontsets.  They don't seem to
explain how to specify a fontset with the :family face attribute.

The documentation for the :font attribute doesn't say that it can 
be a fontset.  But (elisp)Font and Color Parameters says the `font'
frame parameter can be the name of a fontset and the frame parameter 
is "equivalent to the `font' attribute of the `default' face".  So 
one can infer that the :font attribute of a face can be a fontset 
name.  I tested this:

  (progn
    (set-face-attribute 'default nil :font
                        "-*-liberation mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation")
    (font-at 0 nil "a"))

This changes the font to Liberation Mono as expected:

  #<font-object "-1ASC-Liberation Mono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1">

I also tried equivalent expressions with set-face-font and
using the fontset alias, all of which succeeded.

The font is correct but the fontset is actually fontset-auto1, 
not fontset-liberation.  I'll make another report about that.

I think the documentation for the :family attribute should be 
changed to explain how to refer to a fontset if it's possible
to do that.  If it's not possible to specify a fontset with the
:family attribute, the text about fontsets should be removed.

Here is information from report-emacs-bug:

In GNU Emacs 25.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.21)
 of 2017-11-05 built on localhost
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
Configured using:
 'configure --disable-dependency-tracking
 --prefix=/nix/store/7px74nmmy9wnl594jsk0lcgz1ygsbwfj-emacs-25.3
 --with-modules --with-x-toolkit=gtk3 --with-xft'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND DBUS GSETTINGS NOTIFY LIBSELINUX GNUTLS
LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 MODULES

Important settings:
  value of $LC_ALL: en_US.utf8
  value of $LC_COLLATE: C
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set
"-*-liberation mono-normal-normal-normal-*-*-*-*-*-m-0-fontset-liberation"
Mark set
#<font-object "-CYRE-Podkova-normal-normal-normal-*-15-*-*-*-*-0-iso10646-1">
Mark set
Entering debugger...
Back to top level
Mark set
#<font-object "-1ASC-Liberation Mono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1">

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns mail-prsvr mail-utils
help-mode easymenu cl-loaddefs pcase cl-lib debug time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 100076 5220)
 (symbols 48 21018 0)
 (miscs 40 3069 127)
 (strings 32 18822 4645)
 (string-bytes 1 764635)
 (vectors 16 15076)
 (vector-slots 8 511125 5409)
 (floats 8 167 42)
 (intervals 56 249 0)
 (buffers 976 18))




Acknowledgement sent to Thomas Morgan <tlm@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#29630; Package emacs. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Mon, 25 Nov 2019 12:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.