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Subject: Ligatures blocking -- why block unspecified ligatures?
Date: Wed, 12 May 2021 09:22:33 +0000
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Thread-Topic: Ligatures blocking -- why block unspecified ligatures?
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Hi,

I just ran into an issue with the \blockligatures mechanism. For some reaso=
n, the following examples replaces ffi with f|fi and ffl with f|fl although=
 I have not specified them in \blockligatures:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
\definefontfeature[default][default][dlig=3Dyes,liga=3Dyes]
\definefontfeature[default:block][default][blockligatures=3Dyes]

% block certain ligatures globally, but not f|fl, f|fi
\blockligatures [ft,fft,fj,ffj,fk]

\definefontfamily[times][rm][Times New Roman]

\startbuffer[test]
fj\\
ffi\\
ffl\\
ff\\
fi
\stopbuffer

\starttext

\getbuffer[test]

\definedfont[Serif*default:block]
\getbuffer[test]

\switchtobodyfont[times]
\getbuffer[test]

% With Times New Roman, we can even see the bars in the output
\definedfont[Serif*default:block]
\getbuffer[test]

\stoptext
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D

What am I missing?

(I am trying to block certain ligatures globally, ie. ft,fft,fj,ffj,fk, but=
 fi, ffi, fl, fll are being dealt with in the language goodies file.)

Thanks for your help,
Denis

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<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I just ran into an issue with the \blockligatures me=
chanism. For some reason, the following examples replaces ffi with f|fi and=
 ffl with f|fl although I have not specified them in \blockligatures:<o:p><=
/o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D<o:p></o:p></p>
<p class=3D"MsoNormal">\definefontfeature[default][default][dlig=3Dyes,liga=
=3Dyes]<o:p></o:p></p>
<p class=3D"MsoNormal">\definefontfeature[default:block][default][blockliga=
tures=3Dyes]<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">% block certain ligatures globa=
lly, but not f|fl, f|fi<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">\blockligatures [ft,fft,fj,ffj,=
fk]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">\definefontfamily[times][rm][Ti=
mes New Roman]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal">\startbuffer[test]<o:p></o:p></p>
<p class=3D"MsoNormal">fj\\<o:p></o:p></p>
<p class=3D"MsoNormal">ffi\\<o:p></o:p></p>
<p class=3D"MsoNormal">ffl\\<o:p></o:p></p>
<p class=3D"MsoNormal">ff\\<o:p></o:p></p>
<p class=3D"MsoNormal">fi<o:p></o:p></p>
<p class=3D"MsoNormal">\stopbuffer<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">\starttext<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">\getbuffer[test]<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">\definedfont[Serif*default:block]<o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">\getbuffer[test]<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">\switchtobodyfont[times]<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH">\getbuffer[test]<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"FR-CH"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal">% With Times New Roman, we can even see the bars in =
the output<o:p></o:p></p>
<p class=3D"MsoNormal">\definedfont[Serif*default:block]<o:p></o:p></p>
<p class=3D"MsoNormal">\getbuffer[test]<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">\stoptext<o:p></o:p></p>
<p class=3D"MsoNormal">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">What am I missing?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">(I am trying to block certain ligatures globally, ie=
. ft,fft,fj,ffj,fk, but fi, ffi, fl, fll are being dealt with in the langua=
ge goodies file.)
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks for your help,<o:p></o:p></p>
<p class=3D"MsoNormal">Denis<o:p></o:p></p>
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