Re: [NTG-context] post_linebreak_filter in context

2011-02-25 Thread Patrick Gundlach 
Hello Hans,

> 
> first put the function in some namespace, like:
> 
> moduledata.mystuff = { }
> moduledata.mystuff.show_hyph = show_hyph
> 
> then register it in the finalizer group (which is the post_linebreak stuff)
> 
> nodes.tasks.appendaction("finalizers","after","moduledata.mystuff.show_hyph")

Works perfectly.

> (before and after are subgroups that can be used by users if needed; of 
> course one never know to what extent it will influence other processes, so 
> "shipouts","after" might be a better choice)

Ok. In this case it works for me but I'l remember that.

Thanks!

Patrick

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Re: [NTG-context] post_linebreak_filter in context

2011-02-25 Thread Hans Hagen 

On 25-2-2011 12:28, Patrick Gundlach wrote:

Hi,

how do I install a custom post_linebreak_filter in ConTeXt? I have this LaTeX 
file:


\documentclass[12pt,a4paper]{scrartcl}
\usepackage[english]{babel}
\usepackage{blindtext}
\usepackage{fontspec}
\directlua{
show_hyph = function(head)
   while head do
 if head.id == 0 or head.id == 1 then % hlist, vlist
   show_hyph(head.list) % should be head.head in a newer luatex than 0.64
 elseif head.id == 7 then % disc
   local n = node.new("whatsit","pdf_literal")
   n.mode = 0
   n.data = "q 0.3 w 0 2 m 0 7 l S Q"
   n.next = head.next
   n.prev = head
   head.next = n
   head = n
 end
   head = head.next
   end
   return true
end
luatexbase.add_to_callback("post_linebreak_filter",show_hyph,"show_hyph")

}

\begin{document}
\begin{minipage}{5cm}
\blindtext
\end{minipage}
\end{document}


which registers a function "show_hyph" as the post_linebreak_filter (the rest 
is not really interesting). How would I do this in ConTeXt?


first put the function in some namespace, like:

moduledata.mystuff = { }
moduledata.mystuff.show_hyph = show_hyph

then register it in the finalizer group (which is the post_linebreak stuff)

nodes.tasks.appendaction("finalizers","after","moduledata.mystuff.show_hyph")

(before and after are subgroups that can be used by users if needed; of 
course one never know to what extent it will influence other processes, 
so "shipouts","after" might be a better choice)


-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
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[NTG-context] post_linebreak_filter in context

2011-02-25 Thread Patrick Gundlach 
Hi,

how do I install a custom post_linebreak_filter in ConTeXt? I have this LaTeX 
file:


\documentclass[12pt,a4paper]{scrartcl}
\usepackage[english]{babel}
\usepackage{blindtext}
\usepackage{fontspec}
\directlua{
show_hyph = function(head)
  while head do
if head.id == 0 or head.id == 1 then % hlist, vlist
  show_hyph(head.list) % should be head.head in a newer luatex than 0.64
elseif head.id == 7 then % disc
  local n = node.new("whatsit","pdf_literal")
  n.mode = 0
  n.data = "q 0.3 w 0 2 m 0 7 l S Q"
  n.next = head.next
  n.prev = head
  head.next = n
  head = n
end
  head = head.next
  end
  return true
end
luatexbase.add_to_callback("post_linebreak_filter",show_hyph,"show_hyph")

}

\begin{document}
\begin{minipage}{5cm}
\blindtext
\end{minipage}
\end{document}


which registers a function "show_hyph" as the post_linebreak_filter (the rest 
is not really interesting). How would I do this in ConTeXt?

(also asked on tex.se: 
http://tex.stackexchange.com/questions/11960/how-to-register-a-callback-in-context)

Thanks

Patrick

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