GNU bug report logs - #4895
23.1; Incorrect font selected

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From: Kenichi Handa <handa <at> m17n.org>
To: cmr.Pent <at> gmail.com, 4895 <at> debbugs.gnu.org
Cc: bug-gnu-emacs <at> gnu.org
Subject: bug#4895: 23.1; Incorrect font selected
Date: Tue, 10 Nov 2009 10:32:24 +0900

In article <E1N7Zlb-0006fY-GR <at> neo.paramonovs>, Andrey Paramonov <pent <at> aparamon.msk.ru> writes:

> 0) emacs -Q
   
>    My .Xresources:

>    emacs*font: DejaVu Sans Mono-11

> 1) C-x C-f titledefs.dtx (attached)

>    Latin characters are displayed with DejaVu Sans Mono, as expected.
>    Cyrillic characters are not displayed properly. This is Ok yet,
>    because the file is encoded in cp1251.

> 2) C-x RET r cp1251 RET
>    yes RET
   
>    Latin characters are displayed with DejaVu Sans Mono, as expected.
>    Cyrillic characters are displayed, but not with DejaVu Sans Mono.
>    Looks like they are displayed with Terminus.

This is because Emacs prefers a font whose registry matches
with `charset' text property.

In the above case, the default fontset has this entry for
cyrillic:

     (cyrillic ,(font-spec :registry "iso10646-1" :script 'cyrillic)
	       (nil . "ISO8859-5")
	       (nil . "microsoft-cp1251")
	       (nil . "koi8-r"))

and when you read a file with cp1251, the charset property
`cp1251' is put on the buffer text.  Thus the font-selector
prefers a font whose registry is "microsoft-cp1251".

If you prefer cyrillic characters to be displayed by the
default font, you can do this in .emacs:

(set-fontset-font "fontset-default" 'cyrillic
                  (font-spec :registry "iso10646-1" :script 'cyrillic))
                                                                       
---
Kenichi Handa
handa <at> m17n.org

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