--- Begin Message ---
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Subject: |
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Date: |
Sun, 14 May 2017 15:45:04 +0700 |
$ emacs -Q
Observed behavior: *scratch* buffer with two comment lines.
(set-face-attribute 'font-lock-comment-face nil
:box (:line-width -10 :color "yellow")) ^J
nil
Observed behavior: The text in the two comment lines moves 10px to the
right, indicating that vertical lines of the box are drawn outside
character area.
Documented behavior — (info "(elisp) Face Attributes"), emphasis mine:
A negative width -N means to draw a line of width N
that occupies the space of the underlying text,
thus avoiding any increase in the character height **or width**.
Documented behavior — (describe-function 'set-face-attribute):
If WIDTH is negative, the absolute value is the width
of the lines, and draw **top/bottom lines**
inside the characters area, not around it.
So, function documentation is accurate while Info text is technically
accurate but misleading (the character widths do not change, but the
total width of the run of text does).
In GNU Emacs 25.1.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
of 2016-12-13, modified by Debian built on lgw01-55
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
System Description: Ubuntu 16.04.2 LTS
Configured using:
'configure --build x86_64-linux-gnu --prefix=/usr
--sharedstatedir=/var/lib --libexecdir=/usr/lib
--localstatedir=/var/lib --infodir=/usr/share/info
--mandir=/usr/share/man --with-pop=yes
--enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
--with-sound=alsa --build x86_64-linux-gnu --prefix=/usr
--sharedstatedir=/var/lib --libexecdir=/usr/lib
--localstatedir=/var/lib --infodir=/usr/share/info
--mandir=/usr/share/man --with-pop=yes
--enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
--with-sound=alsa --with-x=yes --with-x-toolkit=gtk3
--with-toolkit-scroll-bars 'CFLAGS=-g -O2 -fstack-protector-strong
-Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
-D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11
Important settings:
value of $LC_MONETARY: en_RU.UTF-8
value of $LC_NUMERIC: en_RU.UTF-8
value of $LC_TIME: en_RU.UTF-8
value of $LANG: en_US.UTF-8
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:
Back to top level
Entering debugger...
Back to top level
Complete, but not unique
Making completion list...
Complete, but not unique
Quit
next-line: End of buffer [18 times]
user-error: Beginning of history; no preceding item
user-error: End of history; no default available
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
thingatpt 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 87985 6631)
(symbols 48 19858 0)
(miscs 40 54 171)
(strings 32 14843 4625)
(string-bytes 1 421815)
(vectors 16 11901)
(vector-slots 8 432717 5100)
(floats 8 166 251)
(intervals 56 295 13)
(buffers 976 19)
(heap 1024 22474 1007))
--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#26920: |
|
Date: |
Sun, 14 May 2017 17:26:01 +0300 |
> From: Yuri Khan <address@hidden>
> Date: Sun, 14 May 2017 15:45:04 +0700
>
> $ emacs -Q
>
> Observed behavior: *scratch* buffer with two comment lines.
>
> (set-face-attribute 'font-lock-comment-face nil
> :box (:line-width -10 :color "yellow")) ^J
> nil
>
> Observed behavior: The text in the two comment lines moves 10px to the
> right, indicating that vertical lines of the box are drawn outside
> character area.
>
> Documented behavior — (info "(elisp) Face Attributes"), emphasis mine:
>
> A negative width -N means to draw a line of width N
> that occupies the space of the underlying text,
> thus avoiding any increase in the character height **or width**.
>
> Documented behavior — (describe-function 'set-face-attribute):
>
> If WIDTH is negative, the absolute value is the width
> of the lines, and draw **top/bottom lines**
> inside the characters area, not around it.
>
> So, function documentation is accurate while Info text is technically
> accurate but misleading (the character widths do not change, but the
> total width of the run of text does).
Thanks, fixed.
--- End Message ---