bug#796: 23.0.60; UTF-8 display

bug#796: 23.0.60; UTF-8 display

[Dieter Faulbaum]

This is not really a bug report but a wish list:

The display of the file:
http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-demo.txt
isn't as good as it should be.
(I use the monospace-9 font in emacs under Gnome.)
1. it seems to me, that the linespacing isn't correct (one pixel to much?)
2. the matrix-braces aren't well aligned
3. the box around "typography in plain text files" isn't well aligned
4. the combined characters don't look nice
5. the box drawing alignment tests (at the end) aren't okay

If you need a screenshot of this as an example, I can send it. But maybe
a "self test" should be enough to see what I mean.

But many thanks to bring the development of the emacs so fast forward.




In GNU Emacs 23.0.60.1 (i486-pc-linux-gnu, GTK+ Version 2.12.11)
 of 2008-08-23 on elegiac, modified by Debian
 (emacs-snapshot package, version 1:20080823-1)
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.0.60/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.0.60/site-lisp:/usr/share/emacs/site-lisp' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g -Wl,--as-needed' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Outline

Minor modes in effect:
  show-paren-mode: t
  recentf-mode: t
  desktop-save-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  view-mode: t

Recent input:
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <switch-frame> 
<switch-frame> q q C-x k <return> <C-down-mouse-1> 
C-x k <return> <C-down-mouse-1> C-x k <return> <C-down-mouse-1> 
C-x k <return> C-h n <next> <next> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <next> <next> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <C-down-mouse-1> 
C-h k <C-down-mouse-1> <C-mouse-1> <help-echo> <help-echo> 
<up> <up> <C-up> <C-up> <C-up> <C-up> <C-up> <C-up> 
C-x 1 <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> C-s i n h i <switch-frame> 
<help-echo> <switch-frame> <help-echo> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<down-mouse-5> <mouse-5> <double-down-mouse-5> <double-mouse-5> 
<triple-down-mouse-5> <triple-mouse-5> <down-mouse-5> 
<mouse-5> C-x C-f ~ / W r <tab> U <tab> T <tab> - <tab> 
<return> <next> <next> <next> <prior> <prior> <prior> 
<prior> <next> <next> <prior> <prior> <prior> M-x b 
u g <tab> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> C-x k <return> <C-home> C-s 
r e p o t M-x r e p o r t <tab> <return>

Recent messages:
View mode: type C-h for help, h for commands, q to quit.
Type C-x 1 to delete the help window.
Mark saved where search started
Making completion list...
Loading /usr/share/emacs/23.0.60/lisp/international/uni-name.el (source)...done
call-interactively: Beginning of buffer [2 times]
call-interactively: Text is read-only [7 times]
Quit
Mark set
Mark saved where search started

bug#796: 23.0.60; UTF-8 display

[Jason Rumney]

Dieter Faulbaum wrote:
> 2. the matrix-braces aren't well aligned
> 3. the box around "typography in plain text files" isn't well aligned
> 5. the box drawing alignment tests (at the end) aren't okay
>   

These 3 are probably caused by different width fonts being used for 
different characters. You need to set your default font to something 
that at least covers all the box drawing characters if you want those 
tests to align properly.

In my case, Emacs chooses a Japanese font for the box characters, which 
contains double-width glyphs for the single line box drawing characters, 
and single-width characters for the double line box drawing characters, 
so the alignment is really messed up.

> If you need a screenshot of this as an example, I can send it. But maybe
> a "self test" should be enough to see what I mean.
>   

It really depends on which fonts are installed on the tester's machine, 
and which font they use as the default font. I see some of what you are 
complaining about, but not others.

bug#796: 23.0.60; UTF-8 display

[Glenn Morris]

Dieter Faulbaum wrote:

> The display of the file:
> http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-demo.txt
> isn't as good as it should be.

It renders pretty nicely for me in Emacs 24.0.90.
Looks basically identical to how it is in firefox.
(See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=796#12 comment about fonts)