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Re: [groff] hyphen, minus sign and hyphen-minus
From: |
Pali Rohár |
Subject: |
Re: [groff] hyphen, minus sign and hyphen-minus |
Date: |
Mon, 28 May 2018 15:24:05 +0200 |
User-agent: |
NeoMutt/20170113 (1.7.2) |
On Monday 28 May 2018 15:16:53 Pali Rohár wrote:
> On Monday 28 May 2018 02:48:09 Ingo Schwarze wrote:
> > Hi Pali,
> >
> > Pali Rohar wrote on Sun, May 27, 2018 at 11:52:44PM +0200:
> >
> > > Now I looked deeply at man -Tps output and basically \- sequence is
> > > written as character 0xAD (\255 in octet) into output postscript file.
> > > Therefore it is SOFT HYPHEN (U+00AD),
> >
> > No, that is not a "soft hyphen". Glyph numbers in fonts used for
> > PostScript output have nothing to do with Unicode code points.
> > Look at the file font/devps/TR for examples:
> >
> > PS name TR# Unicode
> > ------- --- -------
> > asciicircum 0x00 U+005E
> > asciitilde 0x01 U+007E
> > Scaron 0x02 U+0053 U+030C
> > Zcaron 0x03 U+005A U+030C
> > scaron 0x04 U+0073 U+030C
> > zcaron 0x05 U+007A U+030C
> > Ydieresis 0x06 U+0059 U+0308
> > trademark 0x07 U+2122
> > quotesingle 0x08 U+0027
> > Euro 0x09 U+20AC
> > hyphen 0x2d U+2010
> > circumflex 0x5e U+02C6
> > quoteleft 0x60 U+2018
> > tilde 0x7e U+02DC
> > bullet 0x83 U+2022
> > florin 0x84 U+0192
> > minus 0xad U+2212
> >
> > and so on and so forth, it's completely different all over the place.
>
> I'm saying that I generated PostScript file via man -Tps and then looked
> into generated PostScript file.
>
> And in PostScript file on place where should command line switch
> --something was F2(\255... or F2<ad... \255 is IIRC glyph encoded in
> octets and <ad> in hex. 0255 and 0xAD are both decimal 173, so both
> refers to same glyph.
>
> Now I see that in that PostScript file is also attached encoding vector
> def /ENC0 [ ... ] and on position 173 is name /minus. And according to
> Adobe /minus name represent Unicode code points U+2212.
>
> So you are right it is not soft-hyphen, I forgot to see at encoding
> vector in result PostScript file.
>
> And also answer my question why ps2pdf converter from generates PDF file
> where for switches are used U+2212 code points. ps2pdf did it correctly
> by looking into attached encoding vector /ENC0.
>
> So problem is for sure in grodvi which generates that PS file with
~~~~~~
I mean grops
> attached encoding vector. Unicode's hyphe-minus has code point U+002D
> and according to Adobe's glyphlist.txt, U+002D is assigned to glyph name
> /hyphen.
>
> So man -Tps (or grodvi) can be fixed. Just it is needed to generate
> correct encoding vector and use proper glyph name /hyphen for \- when
> generating from manpage.
Here is simple fix results to have hyphen-minus (U+002D) for command
line switches in postscript output via man -Tps:
man -Tps groff | sed 's:/minus:/hyphen:g' > groff.ps
But on some places it damage formatting due to different font metrics.
Therefore this replacing should be fixed in groff postscript generator.
> > > so it is incorrect for command line switch.
> >
> > It is not incorrect. The TR font does not contain a glyph for
> > hyphen-minus, so plain minus is used as a fallback.
>
> In font/devps/TR file is this line in "charset" section:
>
> \- 564,286 0 173 minus
>
> Should not this be number 45 instead of 173?
>
--
Pali Rohár
address@hidden
- Re: [groff] hyphen, minus sign and hyphen-minus, (continued)
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/26
- Re: [groff] hyphen, minus sign and hyphen-minus, Deri James, 2018/05/26
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/26
- Re: [groff] hyphen, minus sign and hyphen-minus, Deri James, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus, Ralph Corderoy, 2018/05/29
- Re: [groff] hyphen, minus sign and hyphen-minus, Ingo Schwarze, 2018/05/27
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/27
- Re: [groff] hyphen, minus sign and hyphen-minus, Ingo Schwarze, 2018/05/27
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus,
Pali Rohár <=
- Re: [groff] hyphen, minus sign and hyphen-minus, Mike Bianchi, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus, Pali Rohár, 2018/05/28
- Re: [groff] hyphen, minus sign and hyphen-minus, Ingo Schwarze, 2018/05/28