Re: [Dev-luatex] Traversing node list

30 Oct 2008


      On Thu, 30 Oct 2008, Khaled Hosny wrote:
...
I'm wondering why, in the following code, the first \hbox{} is not seen
by the lua function while the second one is seen i.e. \hbox{} at
paragraph beginning isn't seen.
\directlua0{
local function traverse(h)
  for n in node.traverse (h)
    do texio.write_nl('node id='..node.type(n.id))
    if n.id == node.id('hlist') then
      traverse(n.list)
    end
  end
end
callback.register('pre_linebreak_filter',
  function(h)
    traverse(h)
    return true
  end
)
}
\hbox{Not seen}
that's just a \hbox{} within the page's \vbox{}, it's not starting a
paragraph. A \hbox{} at the beginning of a new paragraph you would get
e. g., by \leavevmode\hbox{Seen}.
...
Hello \hbox{seen}
\bye
Regards, Hartmut

Re: [Dev-luatex] Traversing node list

Hartmut Henkel