[NTG-context] Oddity: \buildtextaccent shifts glyph right

[Rik]

I am using \buildtextaccent to create a couple of characters that have no Unicode equivalent. They are scribal abbreviations that made it into early typesetters works. In this case, the abbreviation are for Latin que, which looks like a q with a small ezh appended in a subscript position, and q with an acute accent, both of which are used in some 17th century works I am dealing with. An example of the abbreviation with the ezh and accent can be seen at https://books.google.com/books?id=hHNVAAAAcAAJ&pg=PA6#v=onepage&q&f=false in the sixth line of the paragraph beginning “Yea but”.

I suspect that this is not intended, but I am not sure.



   % macros=mkvi engine=luajittex

   \starttexdefinition boxWidth #STR
      \setbox0=\hbox{#STR}\the\wd0
   \stoptexdefinition

   \starttexdefinition Dicitque
      Dicitq\kern-0.070em\low{ʒ}\autoinsertnextspace
   \stoptexdefinition
   \starttexdefinition DicitqueK
      Dicit\buildtextaccent\textacute
   q\kern-0.070em\low{ʒ}\autoinsertnextspace
   \stoptexdefinition
   \starttexdefinition DicitqueKK
      Dicit\kern-0.060em\buildtextaccent\textacute
   q\kern-0.070em\low{ʒ}\autoinsertnextspace
   \stoptexdefinition

   \starttexdefinition idque
      idq\autoinsertnextspace
   \stoptexdefinition
   \starttexdefinition idqueK
      id\buildtextaccent\textacute q\autoinsertnextspace
   \stoptexdefinition
   \starttexdefinition idqueKK
      id\kern-0.060em\buildtextaccent\textacute q\autoinsertnextspace
   \stoptexdefinition

   \setupbodyfont[ebgaramond,12pt]

   \starttext
   \startitemize[n,joinedup,packed]
   \item \Dicitque \qquad\boxWidth{\Dicitque}\par
   \item \DicitqueK \qquad\boxWidth{\DicitqueK}\par
   \item \DicitqueKK \qquad\boxWidth{\DicitqueKK}\par
   \it
   \item \Dicitque \qquad\boxWidth{\Dicitque}\par
   \item \DicitqueK \qquad\boxWidth{\DicitqueK}\par
   \item \DicitqueKK \qquad\boxWidth{\DicitqueKK}\par
   \stopitemize
   \startitemize[n,joinedup,packed]
   \item \idque \qquad\boxWidth{\idque}\par
   \item \idqueK \qquad\boxWidth{\idqueK}\par
   \item \idqueKK \qquad\boxWidth{\idqueKK}\par
   \it
   \item \idque \qquad\boxWidth{\idque}\par
   \item \idqueK \qquad\boxWidth{\idqueK}\par
   \item \idqueKK \qquad\boxWidth{\idqueKK}\par
   \stopitemize
   \stoptext

--
Rik

It seems that \buildtextaccent\textacute q (or \buildtextaccent´q) moves the q to the right within the character’s bounding box. The following example (and attached resulting pdf) demonstrates this. Lines 1 and 2 show the string with and without the \buildtextaccent, and lines 4 and 6 repeat that in italic. The strings are the same width, but the q is moved right. Lines 3 and 6 show a manual kerning of the q to improve appearance. This happens with many fonts, but not all (I do not see it with Computer Modern). I am using Win 10Pro x64 with ConTeXt ver: 2015.09.04 11:00 MKIV beta fmt: 2015.9.5 int: english/english. I would also love to raise the accent a bit. Suggestions? I can live with it as it is and manually kern as needed. There are very few instances of these abbreviations that need to be dealt with.

qAcute.pdf
Description: Adobe PDF document

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