bug#613: 23.0.60; Unicode display problems

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

The screen representations of unicode codepoints for left/right double quotes
(x201c, x201d), square root (x221a) and probably many other are too wide and
not anti-aliased like the rest of my glyphs.  According to display-char, they
are taken from

xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1

In contrast to this, alpha, beta, gamma etc are taken from my main screen font
called

xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1

Additionally, the ellipsis (x2026) consists of three dots in x-height (instead
of dots on the baseline).

I didn't have these issues with the CVS version of June 7th.  At that time, all
these glyphs were taken from my main font.




In GNU Emacs 23.0.60.1 (x86_64-unknown-linux-gnu)
 of 2008-07-25 on wilson
Windowing system distributor `The X.Org Foundation', version 11.0.10400090
configured using `configure  '--prefix=/usr/local/' '--mandir=/usr/local/share/man/' '--infodir=/usr/local/share/info/' '--with-x-toolkit=no' '--with-xpm' '--with-jpeg' '--with-tiff' '--with-gif' '--with-png' '--with-x''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  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: de_DE.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Notes

Minor modes in effect:
  diff-auto-refine-mode: t
  outline-minor-mode: t
  global-auto-revert-mode: t
  savehist-mode: t
  display-time-mode: t
  desktop-save-mode: t
  mouse-wheel-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t

bug#613: 23.0.60; Unicode display problems

[Chong Yidong]

Hi Handa,

Do you have any ideas about this?  Could it be related to the fixes you
introduced on 2008-07-09?

> The screen representations of unicode codepoints for left/right double quotes
> (x201c, x201d), square root (x221a) and probably many other are too wide and
> not anti-aliased like the rest of my glyphs.  According to display-char, they
> are taken from
>
> xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
>
> In contrast to this, alpha, beta, gamma etc are taken from my main screen font
> called
>
> xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
>
> Additionally, the ellipsis (x2026) consists of three dots in x-height (instead
> of dots on the baseline).
>
> I didn't have these issues with the CVS version of June 7th.  At that time, all
> these glyphs were taken from my main font.

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <87myjv2tc8.fsf@stupidchicken.com>, Chong Yidong <cyd@stupidchicken.com> writes:

> Hi Handa,
> Do you have any ideas about this?  Could it be related to the fixes you
> introduced on 2008-07-09?

Perhaps.

> > The screen representations of unicode codepoints for left/right double quotes
> > (x201c, x201d), square root (x221a) and probably many other are too wide and
> > not anti-aliased like the rest of my glyphs.  According to display-char, they
> > are taken from
> >
> > xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
> >
> > In contrast to this, alpha, beta, gamma etc are taken from my main screen font
> > called
> >
> > xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
> >
> > Additionally, the ellipsis (x2026) consists of three dots in x-height (instead
> > of dots on the baseline).

Emacs defines those characters (U+201C, U+201D, U+221A) as
`symbol' script and the default fontset defines this font
for `symbol':
  (font-spec :registry "iso10646-1" :script 'symbol)

So, somehow, "Kochi Gothic" font is scored higher than
"Dejavu Sans Mono".  Please try this:

(1) Start Emacs as "% emacs -Q".
(2) ESC : (setq font-log nil)
(3) ESC : (insert #x201c)
(4) M-x font-show-log RET

and show me the result.

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Kenichi Handa writes:

> [...]
>
>>> The screen representations of unicode codepoints for left/right
>>> double quotes (x201c, x201d), square root (x221a) and probably
>>> many other are too wide and not anti-aliased like the rest of my
>>> glyphs.  According to display-char, they are taken from
>>>
>>> xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
>>>
>>> In contrast to this, alpha, beta, gamma etc are taken from my
>>> main screen font called
>>>
>>> xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
>>>
>>> Additionally, the ellipsis (x2026) consists of three dots in
>>> x-height (instead of dots on the baseline).
>
> Emacs defines those characters (U+201C, U+201D, U+221A) as
> `symbol' script and the default fontset defines this font
> for `symbol':
>   (font-spec :registry "iso10646-1" :script 'symbol)
>
> So, somehow, "Kochi Gothic" font is scored higher than
> "Dejavu Sans Mono".  Please try this:
>
> (1) Start Emacs as "% emacs -Q".
> (2) ESC : (setq font-log nil)
> (3) ESC : (insert #x201c)
> (4) M-x font-show-log RET
>
> and show me the result.

ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1
list: -unknown-DejaVu Sans Mono-*-iso10646-1
ftfont-list: -*-DejaVu Sans Mono-*-iso10646-1
list: -*-DejaVu Sans Mono-*-iso10646-1
ftfont-list: -unknown-*-iso10646-1
  -unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1
  -unknown-UnBatang-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-bold-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-UnBatang-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSans-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
  -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
  ...
list: -unknown-*-iso10646-1
  -unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1
  -unknown-UnBatang-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-bold-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-UnBatang-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSans-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
  -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
  ...
sort-by: -unknown-DejaVu Sans Mono-normal-normal-normal-*-12-*-m-0-iso10646-1
  xft:-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
open: -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  xft:-unknown-Kochi Gothic-normal-normal-normal-*-12-*-0-iso10646-1
list: -unknown-DejaVu Sans Mono-normal-*-normal-*-m-0-iso10646-1
  -unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
  -unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1
sort-by: -unknown-DejaVu Sans Mono-normal-italic-normal-*-12-*-m-0-iso10646-1
  xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
open: -unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
  xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-12-*-m-0-iso10646-1

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Chong Yidong]

[Forwarding to the OP, who I accidentally left off the CC list.]

Torsten, could you try what Handa suggested, and let us know the result?
Thanks.

>> > The screen representations of unicode codepoints for left/right
>> > double quotes (x201c, x201d), square root (x221a) and probably many
>> > other are too wide and not anti-aliased like the rest of my glyphs.
>> > According to display-char, they are taken from
>> >
>> > xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
>> >
>> > In contrast to this, alpha, beta, gamma etc are taken from my main
>> > screen font called
>> >
>> > xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
>> >
>> > Additionally, the ellipsis (x2026) consists of three dots in
>> > x-height (instead of dots on the baseline).
>
> Emacs defines those characters (U+201C, U+201D, U+221A) as
> `symbol' script and the default fontset defines this font
> for `symbol':
>   (font-spec :registry "iso10646-1" :script 'symbol)
>
> So, somehow, "Kochi Gothic" font is scored higher than
> "Dejavu Sans Mono".  Please try this:
>
> (1) Start Emacs as "% emacs -Q".
> (2) ESC : (setq font-log nil)
> (3) ESC : (insert #x201c)
> (4) M-x font-show-log RET
>
> and show me the result.

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <87zlnrx33y.fsf@physik.rwth-aachen.de>, Torsten Bronger <bronger@physik.rwth-aachen.de> writes:

> ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1
> list: -unknown-DejaVu Sans Mono-*-iso10646-1
> ftfont-list: -*-DejaVu Sans Mono-*-iso10646-1
> list: -*-DejaVu Sans Mono-*-iso10646-1
> ftfont-list: -unknown-*-iso10646-1
>   -unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1
>   -unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1
>   -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
>   -unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1
>   -unknown-UnBatang-bold-normal-normal-*-0-iso10646-1
>   -unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1
>   -unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1
>   -unknown-UnDotum-bold-normal-normal-*-0-iso10646-1
>   -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
>   -unknown-UnBatang-normal-normal-normal-*-0-iso10646-1
>   -unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1
>   -unknown-FreeSans-normal-normal-normal-*-0-iso10646-1
>   -unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1
>   -unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1
>   -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
>   -unknown-UnDotum-normal-normal-normal-*-0-iso10646-1
>   -unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1
>   -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
>   -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
>   ...

Thank you.  But, unfortunately, the list was too long and
font-show-log truncated such long lists.  Please show me the
value of font-log itself instead:

(1) Start Emacs as "% emacs -Q".
(2) ESC : (setq font-log nil)
(3) ESC : (insert #x201c)
(4) C-h v font-log RET

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Kenichi Handa writes:

> In article <87zlnrx33y.fsf@physik.rwth-aachen.de>, Torsten Bronger
> <bronger@physik.rwth-aachen.de> writes:
>
>> ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1
>> list: -unknown-DejaVu Sans Mono-*-iso10646-1
>> ftfont-list: -*-DejaVu Sans Mono-*-iso10646-1
>> list: -*-DejaVu Sans Mono-*-iso10646-1
>> ftfont-list: -unknown-*-iso10646-1
>> [...]
>>   -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
>>   -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
>>   ...
>
> Thank you.  But, unfortunately, the list was too long and
> font-show-log truncated such long lists.  Please show me the
> value of font-log itself instead:
>
> (1) Start Emacs as "% emacs -Q".
> (2) ESC : (setq font-log nil)
> (3) ESC : (insert #x201c)
> (4) C-h v font-log RET

((sort-by "-unknown-DejaVu Sans Mono-bold-normal-normal-*-12-*-m-0-iso10646-1" "xft:-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-iso10646-1")
 (list "-unknown-DejaVu Sans Mono-*-normal-normal-*-m-0-iso10646-1"
       ["-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1"])
 (sort-by "-unknown-DejaVu Sans Mono-normal-normal-normal-*-12-*-m-0-iso10646-1" "xft:-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1")
 (list "-unknown-*-iso10646-1"
       ["-unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1" "-unknown-UnBatang-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-bold-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-UnBatang-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSans-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1" "-unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-normal-*-0-iso10646-1"])
 (list "-*-DejaVu Sans Mono-*-iso10646-1"
       [])
 (list "-unknown-DejaVu Sans Mono-*-iso10646-1"
       [])
 (sort-by "-unknown-DejaVu Sans Mono-light-normal-normal-*-12-*-m-0-iso10646-1" "xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1")
 (list "-unknown-DejaVu Sans Mono-*-normal-normal-*-m-0-iso10646-1"
       ["-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1"])
 (open "-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1" "xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-12-*-m-0-iso10646-1")
 (sort-by "-unknown-DejaVu Sans Mono-normal-italic-normal-*-12-*-m-0-iso10646-1" "xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1")
 (list "-unknown-DejaVu Sans Mono-normal-*-normal-*-m-0-iso10646-1"
       ["-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1"])
 (open "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "xft:-unknown-Kochi Gothic-normal-normal-normal-*-12-*-0-iso10646-1")
 (sort-by "-unknown-DejaVu Sans Mono-normal-normal-normal-*-12-*-m-0-iso10646-1" "xft:-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1")
 (list "-unknown-*-iso10646-1"
       ["-unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1" "-unknown-UnBatang-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-bold-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-UnBatang-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSans-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1" "-unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-normal-*-0-iso10646-1"])
 (ftfont-list "-unknown-*-iso10646-1"
	      ("-unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1" "-unknown-UnBatang-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-bold-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-UnBatang-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1" "-unknown-FreeSans-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1" "-unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1" "-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1" "-unknown-UnDotum-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1" "-unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1" "-unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1" "-unknown-DejaVu Serif-normal-italic-normal-*-0-iso10646-1"))
 (list "-*-DejaVu Sans Mono-*-iso10646-1"
       [])
 (ftfont-list "-*-DejaVu Sans Mono-*-iso10646-1" nil)
 (list "-unknown-DejaVu Sans Mono-*-iso10646-1"
       [])
 (ftfont-list "-unknown-DejaVu Sans Mono-*-iso10646-1" nil))

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

This is an excerpt of my reply to a related bug, maybe it helps:

Take for example left and right German double quotes (which
are alternative interpretations of x201e and x201c):

            character: „ (8222, #o20036, #x201e)
    preferred charset: unicode (Unicode (ISO10646))
           code point: 0x201E
               syntax: . 	which means: punctuation
             to input: type "\glqq" or "\"`" with TeX
          buffer code: #xE2 #x80 #x9E
            file code: #xE2 #x80 #x9E (encoded by coding system
utf-8-emacs-unix)
              display: by this font (glyph code)
        xft:-unknown-DejaVu Sans
Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1 (#x68F)

    Character code properties: customize what to show
      name: DOUBLE LOW-9 QUOTATION MARK
      general-category: Ps (Punctuation, Open)
      old-name: LOW DOUBLE COMMA QUOTATION MARK


versus

            character: “ (8220, #o20034, #x201c)
    preferred charset: unicode (Unicode (ISO10646))
           code point: 0x201C
               syntax: . 	which means: punctuation
             category: c:Chinese h:Korean j:Japanese
             to input: type "\grqq" or "\ldq" or "\"'" with TeX
          buffer code: #xE2 #x80 #x9C
            file code: #xE2 #x80 #x9C (encoded by coding system
utf-8-emacs-unix)
              display: by this font (glyph code)
        xft:-unknown-Kochi
Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1 (#x26C)

    Character code properties: customize what to show
      name: LEFT DOUBLE QUOTATION MARK
      general-category: Pi (Punctuation, Initial quote)
      old-name: DOUBLE TURNED COMMA QUOTATION MARK


While the first one is displayed correctly, the second one has no
anti-aliasing and is too wide.  I see the "category" item in the
second character.  Maybe this is the cause of this trouble?

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

Sorry for the late responce.

> Kenichi Handa writes:
> > Thank you.  But, unfortunately, the list was too long and
> > font-show-log truncated such long lists.  Please show me the
> > value of font-log itself instead:
> >
> > (1) Start Emacs as "% emacs -Q".
> > (2) ESC : (setq font-log nil)
> > (3) ESC : (insert #x201c)
> > (4) C-h v font-log RET

Thank you for the data.  I found very strange thing.  The
log has this entry.

>  (list "-unknown-DejaVu Sans Mono-*-iso10646-1"
>        [])

So, Emacs couldn't find a font matching with:
  -unknown-DejaVu Sans Mono-*-iso10646-1
But, the log also has this entry.

>  (list "-unknown-DejaVu Sans Mono-*-normal-normal-*-m-0-iso10646-1"
>        ["-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1"])

So, Emacs found:
  -unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-iso10646-1
even if it should match with the former font pattern.

I tried various settings but I couldn't reproduce such a
thing.  Aren't there anyone else who has the same problem.

To find out what's going on in your environment, I need more
detailed logging info.  So I'm going to improve the font-log
facility.

By the way, what is the result of:

% fc-list 'Dejavu Sans Mono' file

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <E1KTDsR-0007MI-4Y@etlken.m17n.org>, Kenichi Handa <handa@m17n.org> writes:

> To find out what's going on in your environment, I need more
> detailed logging info.  So I'm going to improve the font-log
> facility.

Done.  Please try this:

(1) Start Emacs as "% emacs -Q".
(2) ESC : (setq font-log nil)
(3) ESC : (insert #x201c)
(4) C-u - M-x font-show-log RET

Note that the step (4) is slightly different from the
previous one.

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Kenichi Handa writes:

> Kenichi Handa <handa@m17n.org> writes:
>
>> To find out what's going on in your environment, I need more
>> detailed logging info.  So I'm going to improve the font-log
>> facility.
>
> Done.  Please try this:
>
> (1) Start Emacs as "% emacs -Q".
> (2) ESC : (setq font-log nil)
> (3) ESC : (insert #x201c)
> (4) C-u - M-x font-show-log RET

It didn't work with a current CVS Emacs.  All it says is "Font
logging is currently supressed" in the minibuffer.

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <873al2sd2h.fsf@physik.rwth-aachen.de>, Torsten Bronger <bronger@physik.rwth-aachen.de> writes:

> > (1) Start Emacs as "% emacs -Q".
> > (2) ESC : (setq font-log nil)
> > (3) ESC : (insert #x201c)
> > (4) C-u - M-x font-show-log RET

> It didn't work with a current CVS Emacs.  All it says is "Font
> logging is currently supressed" in the minibuffer.

??? Are you sure that you did: (setq font-log nil)

What is the value of font-log just after you did that?

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Kenichi Handa writes:

> In article <873al2sd2h.fsf@physik.rwth-aachen.de>, Torsten Bronger
> <bronger@physik.rwth-aachen.de> writes:
>
>> > (1) Start Emacs as "% emacs -Q".
>> > (2) ESC : (setq font-log nil)
>> > (3) ESC : (insert #x201c)
>> > (4) C-u - M-x font-show-log RET
>
>> It didn't work with a current CVS Emacs.  All it says is "Font
>> logging is currently supressed" in the minibuffer.
>
> ??? Are you sure that you did: (setq font-log nil)

No sorry, after a third try, it worked.  Maybe I had entered
"font-lock".

finding a font for: (8220)
ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
ftfont-list: -*-DejaVu Sans Mono-*-iso10646-1:script=symbol
list: -*-DejaVu Sans Mono-*-iso10646-1:script=symbol
ftfont-list: -unknown-*-iso10646-1:script=symbol
  -unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1
  -unknown-UnBatang-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-bold-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-UnBatang-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSans-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
  -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-normal-*-0-iso10646-1
list: -unknown-*-iso10646-1:script=symbol
  -unknown-DejaVu Sans-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-normal-*-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-oblique-semi-condensed-*-0-iso10646-1
  -unknown-UnBatang-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Sans-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-bold-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-UnBatang-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeSerif-bold-normal-normal-*-0-iso10646-1
  -unknown-FreeSans-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-normal-*-0-iso10646-1
  -unknown-FreeMono-normal-normal-normal-*-m-0-iso10646-1
  -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
  -unknown-UnDotum-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-normal-semi-condensed-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-semi-condensed-*-0-iso10646-1
  -unknown-OpenSymbol-normal-normal-normal-*-0-iso10646-1
  -unknown-Kochi Mincho-normal-normal-normal-*-0-iso10646-1
  -unknown-DejaVu Serif-normal-italic-normal-*-0-iso10646-1
sort-by: -unknown-DejaVu Sans Mono-normal-normal-normal-*-12-*-m-0-iso10646-1
  xft:-unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1
open: -unknown-Kochi Gothic-normal-normal-normal-*-0-iso10646-1:script=symbol
  xft:-unknown-Kochi Gothic-normal-normal-normal-*-12-*-0-iso10646-1
finding a font for: (8220)
finding a font for: (8220)
finding a font for: (8220)
list: -unknown-DejaVu Sans Mono-normal-*-normal-*-m-0-iso10646-1
  -unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
  -unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1
sort-by: -unknown-DejaVu Sans Mono-normal-italic-normal-*-12-*-m-0-iso10646-1
  xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
open: -unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1
  xft:-unknown-DejaVu Sans Mono-normal-oblique-normal-*-12-*-m-0-iso10646-1

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <87od3qqvlg.fsf@physik.rwth-aachen.de>, Torsten Bronger <bronger@physik.rwth-aachen.de> writes:

> finding a font for: (8220)
> ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
> list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
[...]

Now I see what is wrong.  Dejavu Sans Mono lacks some of
charaters (#x201C #x2200 #x2500) to be used as `symbol'
font, so the other arbitrary font that contains all of those
characters are selected.  This setting was added by the
request in the attached mail, but it seems that the
restriction is too strong for symbol fonts.  So, I deleted
that restriction.  Please try again with the latest CVS code.

---
Kenichi Handa
handa@ni.aist.go.jp

In article <18477.2875.876651.446827@priss.frightenedpiglet.com>, sand@blarg.net writes:

> Below is the complete set of fontset changes that my system needed to
> display the HELLO file and Markus Kuhn's "UTF-8-demo.txt" file.  There
> are various problems with the fontset definitions that we can fix in
> Emacs Lisp.

>   1. The "symbol" and "phonetic" scripts don't have any representative
>   characters defined, and they don't have any fontset defined.

>   2. The Latin script doesn't have representative characters over
>   7-bits.  This means the Xft backend doesn't have any constraint that
>   would reject ISO8859-1 fonts.  Emacs appears to have special support
>   for real ISO8859-1 characters, so the new definition should not
>   break anything.

>   3. The Armenian script has representative characters, but no fontset
>   defined.

>   4. The Thai fontset definition assumes that you have OpenType set
>   up.  It needs a fallback in case you don't.

>   5. The Hangul fontset definition assumes that you have a language
>   definition in your Hangul font.  It needs a fallback in case you
>   don't.

> Note that for some people, the "symbol", "phonetic" and Latin scripts
> may display just fine.  The problem is that Emacs is not rejecting
> ISO8859-1 fonts---but if your installation happens to pick a
> ISO10646-1 font with coverage first then you won't see any weirdness.
> For example, my work machine had trouble displaying the scripts while
> my home machine did not.

> It may be that the Thai and Hangul definitions are the tip of the
> iceberg.  I suspect that *every* ISO10646-1 fontset definition that
> uses :otf or :language needs a fallback definition that uses :script.

> If your HELLO file shows weird fonts being picked (such as a
> double-width Chinese font for U+2018 LEFT SINGLE QUOTATION MARK) or
> "missing font" boxes, can you please try putting the below code into
> your .emacs file to see if it fixes the problem?  These were sufficent
> to get my work machine displaying every HELLO and "UTF-8-demo.txt"
> glyphs for every font that I had installed.

> This code can be applied to CVS HEAD before or after the font-backend
> merge.

> Derek

> --
> Derek Upham
> sand@blarg.net

> ------------------------------ cut here ------------------------------

> ;; The eval-after-load here is a hack for testing.  These should
> ;; really be changes in "fontset.el".
> ;;
> ;; Some of the fontset definitions have 'prepend for testing.  When
> ;; added to "fontset.el" they should go into some appropriate
> ;; location in the current lists.

> (eval-after-load "fontset"
>   '(progn

> ;; Representative characters for Latin need to include the
> ;; various extension blocks.  This should replace the existing
> ;; definition.
> (setq script-representative-chars
>       (cons '(latin ?A ?Z ?a ?z #x00C0 #x0100 #x0180 #x1e00)
>             script-representative-chars))

> ;; Representative characters for symbols were not defined.
> (setq script-representative-chars
>       (cons '(symbol #x201C #x2200 #x2500)
>             script-representative-chars))

> ;; Representative characters for phonetics were not defined.
> (setq script-representative-chars
>       (cons '(phonetic #x0250 #x0283)
>             script-representative-chars))

> ;; 'latin script needs a declaration that incorporates the Latin
> ;; representative characters.  None of the current ones do.
> (set-fontset-font "fontset-default" 'latin
>  (font-spec :registry "iso10646-1" :script 'latin) nil 'prepend)

> ;; No 'symbol script declaration exists.  Create one using the new
> ;; representative characters.
> (set-fontset-font "fontset-default" 'symbol
>  (font-spec :registry "iso10646-1" :script 'symbol))

> ;; No 'phonetic declaration exists.  Create one using the new
> ;; representative characters.  (Note that there is an 'ipa
> ;; declaration, but 'ipa doesn't exist as a real script.)
> (set-fontset-font "fontset-default" 'phonetic
>  (font-spec :registry "iso10646-1" :script 'phonetic))

> ;; No fontset was defined for Armenian.
> (set-fontset-font "fontset-default" 'armenian
>  (font-spec :registry "iso10646-1" :script 'armenian))

> ;; The Thai fontset definition assumes that you have OpenType
> ;; definitions set up properly.  We need an explicit :script
> ;; declaration as a backup.  I think this should go after the :otf
> ;; declaration, but I'm doing it as a 'prepend here.  (Perhaps
> ;; FreeSerif Thai fonts comply with OpenType, but Misc-Fixed
> ;; ones don't.)
> (set-fontset-font "fontset-default" 'thai
>  (font-spec :registry "iso10646-1" :script 'thai) nil 'prepend)

> ;; 'hangul script has a :language restriction for iso10646-1, but also
> ;; needs :script restriction as alternative.
> (set-fontset-font "fontset-default" 'hangul
>   (font-spec :registry "iso10646-1" :script 'hangul) nil 'prepend)

> ))

bug#613: 23.0.60; Unicode display problems

[sand]

Kenichi Handa writes:
> In article <87od3qqvlg.fsf@physik.rwth-aachen.de>, Torsten Bronger <bronger@physik.rwth-aachen.de> writes:
> 
> > finding a font for: (8220)
> > ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
> > list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
> [...]
> 
> Now I see what is wrong.  Dejavu Sans Mono lacks some of
> charaters (#x201C #x2200 #x2500) to be used as `symbol'
> font, so the other arbitrary font that contains all of those
> characters are selected.  This setting was added by the
> request in the attached mail, but it seems that the
> restriction is too strong for symbol fonts.  So, I deleted
> that restriction.  Please try again with the latest CVS code.

Removing the symbol restrictions will allow Emacs to pick (incorrect)
ISO8859-1 fonts for these characters again.  Have you changed
something in the C code to prevent that?

Looking at the DejaVu Sans Mono glyphs in "gucharmap", it appears that
#x2200 is the problem.  The #x201C, #x2200, #x2500 combination was an
attempt to find "representative" symbol codepoints, but that
combination isn't all-or-nothing.  Can you first try leaving just
#x201C in `script-representative-chars'?  That's LEFT DOUBLE QUOTATION
MARK, so it should have wide coverage.

Derek

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Kenichi Handa writes:

> In article <87od3qqvlg.fsf@physik.rwth-aachen.de>, Torsten Bronger
> <bronger@physik.rwth-aachen.de> writes:
>
>> finding a font for: (8220)
>> ftfont-list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
>> list: -unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol
>
> [...]
>
> Now I see what is wrong.  Dejavu Sans Mono lacks some of charaters
> (#x201C #x2200 #x2500) to be used as `symbol' font, so the other
> arbitrary font that contains all of those characters are selected.
> This setting was added by the request in the attached mail, but it
> seems that the restriction is too strong for symbol fonts.  So, I
> deleted that restriction.  Please try again with the latest CVS
> code.

It works now as for this change but apparently, it still is not
fully correct.  At least two characters that I use ("prime" #x2032
and "cubic root" #x221b) are still too wide, however, I don't know
whether they are available in the DejaVu font.

Do you think it's sensible to create a file will all codepoints and
look for problematic chars in a systematic way?

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <18604.9770.893099.425147@priss.frightenedpiglet.com>, sand@blarg.net writes:

> Kenichi Handa writes:
[...]
> > Now I see what is wrong.  Dejavu Sans Mono lacks some of
> > charaters (#x201C #x2200 #x2500) to be used as `symbol'
> > font, so the other arbitrary font that contains all of those
> > characters are selected.  This setting was added by the
> > request in the attached mail, but it seems that the
> > restriction is too strong for symbol fonts.  So, I deleted
> > that restriction.  Please try again with the latest CVS code.

> Removing the symbol restrictions will allow Emacs to pick (incorrect)
> ISO8859-1 fonts for these characters again.  Have you changed
> something in the C code to prevent that?

Now the entry for symbols is this:

     (symbol ,(font-spec :registry "iso10646-1"))

So, at least, Emacs tries to select an iso10646-1 font that
is closest (in family, style, size) to the default font.

> Looking at the DejaVu Sans Mono glyphs in "gucharmap", it appears that
> #x2200 is the problem.  The #x201C, #x2200, #x2500 combination was an
> attempt to find "representative" symbol codepoints, but that
> combination isn't all-or-nothing.  Can you first try leaving just
> #x201C in `script-representative-chars'?  That's LEFT DOUBLE QUOTATION
> MARK, so it should have wide coverage.

I think the typical usage of symbol characters is to use a
few of them in a normal text.  In that case, the most
suitable font for those symbols is the default font
(provided that it supports those symbols) rather than a font
that covers wider range of symbols.  So, I think there's no
merit in restricting fonts in the above way.

As a result, when a sequence of many symbols is displayed,
Emacs will not use the same font for them, but, I think it's
not a big problem.

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <87k5ebbrq1.fsf@physik.rwth-aachen.de>, Torsten Bronger <bronger@physik.rwth-aachen.de> writes:

> It works now as for this change but apparently, it still is not
> fully correct.  At least two characters that I use ("prime" #x2032
> and "cubic root" #x221b) are still too wide, however, I don't know
> whether they are available in the DejaVu font.

Dejavu Sans Mono doesn't have those characters.  In such a
case, it's very difficult to decide which is the "correct"
font.

A while ago, stephen@xemacs.org suggested to utilize
fontconfig's language repertoires.  I'm going to implement
that somehow.  When it is done, for non-CJK locale users,
Emacs can select a single-width font.

> Do you think it's sensible to create a file will all codepoints and
> look for problematic chars in a systematic way?

No, it won't help.

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Juanma Barranquero]

On Thu, Aug 21, 2008 at 03:01, Kenichi Handa <handa@m17n.org> wrote:

> Dejavu Sans Mono doesn't have those characters.

I think the newest DejaVu Sans Mono (2.26) does have U+201C, U+2200,
U+2500 and U+221B.

It still lacks U+2032, though.

  Juanma

bug#613: 23.0.60; Unicode display problems

[sand]

Kenichi Handa writes:
> In article <18604.9770.893099.425147@priss.frightenedpiglet.com>, sand@blarg.net writes:
> 
> > Kenichi Handa writes:
> [...]
> > > Now I see what is wrong.  Dejavu Sans Mono lacks some of
> > > charaters (#x201C #x2200 #x2500) to be used as `symbol'
> > > font, so the other arbitrary font that contains all of those
> > > characters are selected.  This setting was added by the
> > > request in the attached mail, but it seems that the
> > > restriction is too strong for symbol fonts.  So, I deleted
> > > that restriction.  Please try again with the latest CVS code.
> 
> > Removing the symbol restrictions will allow Emacs to pick (incorrect)
> > ISO8859-1 fonts for these characters again.  Have you changed
> > something in the C code to prevent that?
> 
> Now the entry for symbols is this:
> 
>      (symbol ,(font-spec :registry "iso10646-1"))
> 
> So, at least, Emacs tries to select an iso10646-1 font that
> is closest (in family, style, size) to the default font.
> 

I'm seeing a complete regression.  I rebuilt from CVS HEAD, confirmed
that your change is in fontset.el, and Emacs picks AR PL ShanHeiSun
for open single quotes.  Putting the script definitions back in fixes
the problem.  I have pasted "good" and "bad" font log blocks to the
end of this message.  Those logs are particularly for Neep Alt, but
the Misc Fixed ISO10646 fonts have the same problem.

Derek

------------------------------ cut here ------------------------------

Successful load of LEFT SINGLE QUOTE with the old definition using
"script":

font for: (8216)
ftfont-list: -jmk-Neep Alt-*-iso10646-1:script=symbol
  -jmk-Neep Alt-bold-normal-normal-*-20-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-bold-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-15-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
list: -jmk-Neep Alt-*-iso10646-1:script=symbol
  -jmk-Neep Alt-bold-normal-normal-*-20-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-bold-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-15-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
sort-by: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
open: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1:script=symbol
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1


Unsuccessful load of LEFT SINGLE QUOTE with new definition:

font for: (8216)
ftfont-list: -jmk-Neep Alt-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-11-*-c-*-iso10646-1
  -jmk-Neep Alt-bold-normal-normal-*-15-*-c-*-iso10646-1
  -jmk-Neep Alt-bold-normal-normal-*-15-*-c-*-iso10646-1
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  -jmk-Neep Alt-normal-normal-normal-*-15-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
sort-by: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
open: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
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  -jmk-Neep Alt-normal-normal-normal-*-15-*-c-*-iso10646-1
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list: -jmk-Neep Alt-*-iso10646-1
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sort-by: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
open: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
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list: -jmk-Neep Alt-*-iso10646-1
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  -jmk-Neep Alt-bold-normal-normal-*-20-*-c-*-iso10646-1
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  -jmk-Neep Alt-normal-normal-semi-condensed-*-11-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
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  -jmk-Neep Alt-bold-normal-semi-condensed-*-11-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-10-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-24-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-bold-normal-semi-condensed-*-13-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-15-*-c-*-iso10646-1
  -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
sort-by: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
  xft:-jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
ftfont-list: -gnu-unifont-*-iso10646-1
list: -gnu-unifont-*-iso10646-1
ftfont-list: -mutt-clearlyu-*-iso10646-1
list: -mutt-clearlyu-*-iso10646-1
list: -jmk-Neep Alt-*-gb18030*-*
list: -*-Neep Alt-*-gb18030*-*
list: -jmk-*-gb18030*-*
list: -*-gb18030*-*
ftfont-list: -jmk-Neep Alt-*-gb2312.1980*-*
list: -jmk-Neep Alt-*-gb2312.1980*-*
ftfont-list: -*-Neep Alt-*-gb2312.1980*-*
list: -*-Neep Alt-*-gb2312.1980*-*
ftfont-list: -jmk-*-gb2312.1980*-*
list: -jmk-*-gb2312.1980*-*
ftfont-list: -*-gb2312.1980*-*
  -ISAS-Fangsong ti-normal-normal-normal-*-24-*-c-*-iso10646-1
  -unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
  -unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
  -unknown-AR PL ZenKai Uni-normal-normal-normal-*-0-iso10646-1
  -ISAS-Fangsong ti-normal-normal-normal-*-16-*-c-*-iso10646-1
list: -*-gb2312.1980*-*
  -ISAS-Fangsong ti-normal-normal-normal-*-24-*-c-*-iso10646-1
  -unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
  -unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
  -unknown-AR PL ZenKai Uni-normal-normal-normal-*-0-iso10646-1
  -ISAS-Fangsong ti-normal-normal-normal-*-16-*-c-*-iso10646-1
sort-by: -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-gb2312.1980*-*
  xft:-unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
open: -unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-0-iso10646-1
  xft:-unknown-AR PL ShanHeiSun Uni-normal-normal-normal-*-20-*-0-iso10646-1
font for: (8216)
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list: -mutt-clearlyu-*-iso10646-1
list: -jmk-Neep Alt-*-gb18030*-*
list: -*-Neep Alt-*-gb18030*-*
list: -jmk-*-gb18030*-*
list: -*-gb18030*-*
font for: (8217)
list: -gnu-unifont-*-iso10646-1
list: -mutt-clearlyu-*-iso10646-1
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list: -*-Neep Alt-*-gb18030*-*
list: -jmk-*-gb18030*-*
list: -*-gb18030*-*
font for: (8217)
list: -gnu-unifont-*-iso10646-1
list: -mutt-clearlyu-*-iso10646-1
list: -jmk-Neep Alt-*-gb18030*-*
list: -*-Neep Alt-*-gb18030*-*
list: -jmk-*-gb18030*-*
list: -*-gb18030*-*
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list: -mutt-clearlyu-*-iso10646-1
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list: -*-Neep Alt-*-gb18030*-*
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list: -*-gb18030*-*
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list: -*-Neep Alt-*-gb18030*-*
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list: -*-gb18030*-*
font for: (8216)
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bug#613: 23.0.60; Unicode display problems

[sand]

Kenichi Handa writes:
> In article <18613.24465.897881.636770@priss.frightenedpiglet.com>, sand@blarg.net writes:
> 
> > I'm seeing a complete regression.  I rebuilt from CVS HEAD, confirmed
> > that your change is in fontset.el, and Emacs picks AR PL ShanHeiSun
> > for open single quotes.  Putting the script definitions back in fixes
> > the problem.  I have pasted "good" and "bad" font log blocks to the
> > end of this message.  Those logs are particularly for Neep Alt, but
> > the Misc Fixed ISO10646 fonts have the same problem.
> 
> [...]
> > Unsuccessful load of LEFT SINGLE QUOTE with new definition:
> 
> > font for: (8216)
> > ftfont-list: -jmk-Neep Alt-*-iso10646-1
> [...]
> >   -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
> [...]
> >   -jmk-Neep Alt-normal-normal-normal-*-20-*-c-*-iso10646-1
> 
> Don't you happen to have two sets of "Neep Alt" fonts in the
> fontconfig's fontpath; one set supports LEFT SINGLE QUOTE,
> and the other doesn't?

Neep Alt was originally designed for ISO8859-1 encodings, and my
installation still has iso18859-1 fonts that definitely lack LEFT
SINGLE QUOTE.  However, I constructed additional fonts to support
ISO10646-1, by extracting the Misc Fixed glyphs outside of ISO8859-1,
and appending them to the Neep Alt font definitions.  Those fonts are
defined to have the iso10646-1 encoding.

When I first noticed the font display problem a couple of months ago,
I traced the font code in the debugger and found that Emacs considered
the ISO8859-1 fonts to be valid matches for LEFT SINGLE QUOTE and
similar codepoints.  It would:

  * load the ISO8859-1 font, rather than the ISO10646-1 font,
  * notice that LEFT SINGLE QUOTE was missing, and then
  * start looking in other font families for the codepoint.

Adding LEFT SINGLE QUOTE and a couple of others as "symbol"
representatives let Emacs filter out the ISO8859-1 fonts earlier in
the code path, leaving the ISO10646-1 fonts for Emacs to use.  The
Misc Fixed fonts had the same problem, as they also included ISO8859-1
and ISO10646-1 encodings, and this solution worked for them as well.

One approach that we might consider is to change the C code, so that
any ISO8859-1 font is immediately skipped when the codepoint is 256 or
greater.  Or we could change the font loading code to try multiple
encodings within a family before dropping back to other families.

Derek

bug#613: 23.0.60; Unicode display problems

[Kenichi Handa]

In article <18614.49466.916241.572583@priss.frightenedpiglet.com>, sand@blarg.net writes:

> Neep Alt was originally designed for ISO8859-1 encodings,
> and my installation still has iso18859-1 fonts that
> definitely lack LEFT SINGLE QUOTE.  However, I constructed
> additional fonts to support ISO10646-1, by extracting the
> Misc Fixed glyphs outside of ISO8859-1, and appending them
> to the Neep Alt font definitions.  Those fonts are defined
> to have the iso10646-1 encoding.

Ah, I see.

> Adding LEFT SINGLE QUOTE and a couple of others as
> "symbol" representatives let Emacs filter out the
> ISO8859-1 fonts earlier in the code path, leaving the
> ISO10646-1 fonts for Emacs to use.  The Misc Fixed fonts
> had the same problem, as they also included ISO8859-1 and
> ISO10646-1 encodings, and this solution worked for them as
> well.

I re-added `symbol' entry to script-representative-chars but
with vector of characters as this:

	(symbol . [#x201C #x2200 #x2500])

and modified ftfont.c to handle that kind of format to
fileter out fonts that have none of characters in the
vector.

Please you try again with the latest code.

---
Kenichi Handa
handa@ni.aist.go.jp

bug#613: 23.0.60; Unicode display problems

[Chong Yidong]

Do you still see a problem with the latest CVS code, with Kenichi
Handa's changes?

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!

Chong Yidong writes:

> Do you still see a problem with the latest CVS code, with Kenichi
> Handa's changes?

Everything works now like before the change that broke it for me.

But I saw another regression in that area, maybe introduced by
related changes: Combining diacritical marks may vanish from
display.  If I have a letter followed by a dot accent, for example,
I don't see the dot; neither on the letter, nor directly after it.

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[Torsten Bronger]

Hallöchen!   Torsten Bronger writes:  > Chong Yidong writes: > >> 
Do you still see a problem with the latest CVS code, with Kenichi 
>> Handa's changes?  > > [...]  > > But I saw another regression 
in that area, maybe introduced by > related changes: Combining 
diacritical marks may vanish from > display.  If I have a letter 
followed by a dot accent, for > example, I don't see the dot; 
neither on the letter, nor directly > after it.   By the way, such 
combining diacritical marks irritate longlines-mode.  My file 
starts with  -*- mode: longlines -*-

If I load this file, longlines-mode stops wrapping at the first
combining diacritic, point is there, and Emacs says "File mode
specification error: (args-out-of-range 5999 5999)".

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de

bug#613: 23.0.60; Unicode display problems

[sand]

Kenichi Handa writes:
> I re-added `symbol' entry to script-representative-chars but
> with vector of characters as this:
> 
> 	(symbol . [#x201C #x2200 #x2500])
> 
> and modified ftfont.c to handle that kind of format to
> fileter out fonts that have none of characters in the
> vector.
> 
> Please you try again with the latest code.

I synced to CVS HEAD, and removed my local overrides.  The HELLO
document and UTF-8-demo document look fine now.  Thanks.

Derek