Hi Patrick,
thanks for your answer!
Patrick Gundlach wrote:
this is again a rather simple question and I am sorry for taking your time for
this …
In short, I want to reverse all glyph nodes in a line, and/or all lines in a
paragraph. I tried something like the following (with the idea to store all
lines in a list, then replace the lines with the list in reversed order):
function reverse(head)
newlines = {}
i = 1
for line in node.traverse_id(node.id"hhead",head) do
newlines[i] = line
a lua idiom is newlines[#newlines + 1] = ... - easer to read to the average Lua
hackr.
Oh, of course … I fear I'll never get used to this Lua style …
i = i+1
end
j = #newlines
for line in node.traverse_id(node.id"hhead",head) do
node.insert_before(head,line,newlines[j])
j = j-1
end
return head
end
I have to admit that I don't understand exactly what is going on here.
Me neither ;)
I never use the node.insert_* functions as they are some black magic to me, I
always change next/prev pointsers manually, so I have the feeling of what I
have to do.
But shouldn't the node.insert_* just do the same?
Therefore my brain just blocks when I try to analyze your code. Sorry. If you
want a manual solution, see the following code.
I'm happy with anything that works and that I understand. However,
that's a lot of code for such a (seemingly) simple task … I'll try to
understand your code and do an implementation on my own to learn it.
(Also, I want to separate the line reversing and glyph-per-line-reversing)
Thank you very much,
cheers
Arno
p.s.: as I'm already writing about silly manipulations, I have two more
“useless” questions:
• I want to rotate a page after it has been completed. Could anyone give
me a hint where to start for this? (callbacks, how to rotate a box? …)
• I'd like to rotate single glyphs by an arbitrary angle. Is this
possible with Lua code, after line breaking? Or would I have to create a
new font for that?
