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From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 19395@debbugs.gnu.org, malsburg@posteo.de
Subject: bug#19395: 25.0.50; Setting left fringe to 0 messes up window-width
Date: Sat, 20 Dec 2014 12:42:49 +0100	[thread overview]
Message-ID: <549560B9.5070308@gmx.at> (raw)
In-Reply-To: <83bnmysi2n.fsf@gnu.org>

 > AFAIU, it only says so about the set-face-FOO functions, which doesn't
 > include face-font.

Here I see in "37.12.3 Face Attribute Functions"

...

    The following functions examine the attributes of a face.  They
mostly provide compatibility with old versions of Emacs.  If you don't
specify FRAME, they refer to the selected frame; `t' refers to the
default data for new frames.  They return `unspecified' if the face
doesn't define any value for that attribute.  If INHERIT is `nil', only
an attribute directly defined by the face is returned.  If INHERIT is
non-`nil', any faces specified by its `:inherit' attribute are
considered as well, and if INHERIT is a face or a list of faces, then
they are also considered, until a specified attribute is found.  To
ensure that the return value is always specified, use a value of
`default' for INHERIT.

  -- Function: face-font face &optional frame
      This function returns the name of the font of face FACE.

...

Maybe "mostly" is special here.

 >> But we also should mention (and I still think `font-info' is the better
 >> place for that) what happens when the current buffer has rescaled text
 >> but is not displayed on the selected frame (or the frame denoted by the
 >> argument of `font-info').
 >
 > How can the current buffer be not displayed in the selected frame?

As in

(with-selected-frame some-frame
   (with-current-buffer a-buffer-not-displayed-on-some-frame
     ...

 >> I still don't
 >> understand where and how text rescaling is applied.
 >
 > In face-remap.el, and then in xfaces.c (search for face_remapping in
 > the latter).

This boils down to understanding the 200+ lines of merge_face_ref, at
least.

 > Assuming I understand correctly what is it that confused
 > you.

If I look at the doc-string of say `text-scale-adjust' I cannot see that
some buffer local value is mentioned although C-x C-- clearly has only a
buffer local effect here.  So I obviously have to delve into the doc of
something like `face-remapping-alist' which, however, doesn't mention
any relationship of faces to frames.

IIUC face remapping maps a default face (which may be frame specific or
not) via a scaling value (which may be buffer local or not) to another
face whose width I eventually want to retrieve via `face-font'.  Does
the buffer/frame/window relationship affect that value and if so how?

martin





  reply	other threads:[~2014-12-20 11:42 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-16 20:01 bug#19395: 25.0.50; Setting left fringe to 0 messes up window-width Titus von der Malsburg
2014-12-16 20:09 ` Eli Zaretskii
2014-12-16 20:36   ` Titus von der Malsburg
2014-12-16 20:58     ` Eli Zaretskii
2014-12-16 23:12       ` Stefan Monnier
2014-12-17  3:39         ` Eli Zaretskii
2014-12-17 14:16           ` Stefan Monnier
2014-12-17 15:47             ` Eli Zaretskii
2014-12-17 21:31               ` Stefan Monnier
2014-12-17 22:57                 ` Drew Adams
2014-12-18  3:37                 ` Eli Zaretskii
2014-12-18 14:24                   ` Stefan Monnier
2014-12-18 15:51                     ` Eli Zaretskii
2014-12-20 10:09                       ` martin rudalics
2014-12-20 11:00                         ` Eli Zaretskii
2014-12-17  3:46         ` Titus von der Malsburg
2014-12-17 15:29           ` Eli Zaretskii
2014-12-17 21:34             ` Stefan Monnier
2014-12-18  3:40               ` Eli Zaretskii
2014-12-18 14:25                 ` Stefan Monnier
2014-12-18 15:52                   ` Eli Zaretskii
2014-12-17  3:28       ` Titus von der Malsburg
2014-12-17 15:32         ` Eli Zaretskii
2014-12-17 17:18           ` Titus von der Malsburg
2014-12-17 18:21             ` Eli Zaretskii
2014-12-17 18:48               ` Titus von der Malsburg
2014-12-17 19:09                 ` Eli Zaretskii
2014-12-18  3:36                   ` Titus von der Malsburg
2014-12-18 16:15                     ` Eli Zaretskii
2014-12-19 17:09                       ` martin rudalics
2014-12-19 19:35                         ` Eli Zaretskii
2014-12-20 10:09                           ` martin rudalics
2014-12-20 10:59                             ` Eli Zaretskii
2014-12-20 11:42                               ` martin rudalics [this message]
2014-12-20 12:45                                 ` Eli Zaretskii
2014-12-20 14:51                                   ` martin rudalics
2014-12-20 16:36                                     ` Eli Zaretskii
2014-12-20 17:50                                       ` martin rudalics
2014-12-20 18:16                                         ` Eli Zaretskii
2014-12-20 18:58                                           ` martin rudalics
2014-12-20 19:52                                             ` Eli Zaretskii
2014-12-21 12:14                                               ` Titus von der Malsburg
2014-12-21 16:43                                                 ` Eli Zaretskii
2014-12-20 14:51                       ` Titus von der Malsburg
2014-12-20 15:06                         ` martin rudalics
2014-12-20 15:21                           ` Titus von der Malsburg
2014-12-20 16:03                             ` martin rudalics
2014-12-20 16:40                               ` Eli Zaretskii
2014-12-20 15:45                           ` Titus von der Malsburg
2014-12-20 16:38                           ` Eli Zaretskii
2014-12-20 17:51                             ` martin rudalics
2014-12-20 18:19                               ` Eli Zaretskii
2014-12-20 16:31                         ` Eli Zaretskii
2014-12-21 22:04                           ` Titus von der Malsburg
2014-12-22 16:00                             ` Eli Zaretskii
2022-04-29 13:14                               ` Lars Ingebrigtsen
2022-06-02 21:41                                 ` Jim Porter
     [not found]                                 ` <a54d35b0-7ed6-374c-2a14-e7d97cf6c0a2@gmail.com>
2022-06-03  3:21                                   ` Lars Ingebrigtsen
2014-12-18 17:16         ` Eli Zaretskii

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