Patrick Gundlach wrote:
Hello Luigi, all,
It's not correct -- I must set head.width = 1451240 by try and error
I'll wait for Taco to get back from vacation :)
Hi Patrick and Luigi ..
(as i'm not monitoring this list constantly - as it's mostly latex
issues - next ask such things on the context list)
The kind of things you're asking for (basically doing tex things at the
lua end) are on the agenda but for later once the whoile machinery is
opened up and it does not make much sense to run ahead of the agenda
we need to sort out backend issues, directionality, more control over
the par and pagebuilder etc and as soon as something is opened up it's
likely that there is a function that does similar things at the lua end
(hpack is an example); ideally one would like to have expansion and
typesetiing at the lua end but we're not yet there
anyhow, here's an example ...
\starttext
\startluacode
function mylist(str,fontid,spacing)
local head, prev = nil, nil
for s in string.utfvalues(str) do
local next
if spacing and s == 32 then
next = node.new(node.id("glue"))
next.spec = node.new(node.id("glue_spec"))
next.spec.width = spacing or 64*1024*10
else
next = node.new(node.id("glyph"))
next.char = s
next.font = fontid or 1
end
if not head then
head = next
else
prev.next = next
next.prev = prev
end
prev = next
end
return head
end
function myhpack(str,fontid,spacing)
return node.hpack(mylist(str,fontid,spacing))
end
function myvpack(str,fontid,spacing)
-- vpack is just a hack, and a proper implentation is on the agenda
-- as it needs more info etc than currently available
end
node.write(myhpack("Hello World!"))
node.write(myhpack("Hello World!",1,100*1024*10))
\stopluacode
\stoptext
Don't expect vpack to work before the par builder is opened up (all
those parameters).
I'll start adding some examples to the context mkiv code base.
Hans
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