Change of nuts.dimensions function ?

Change of nuts.dimensions function ?

[Joseph Canedo]

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Hello all,

It seems that with latest ConTeXt beta (with luatex 1.07.0) it seems that nuts.dimensions function behaviour has changed. Simple MWE shows the change.
Which function should be used now to get natural width of a range [n, t[ of nodes please?
Thanks a lot
Regards

Joseph Canedo

\startluacode

local nuts   = nodes.nuts
local getdimensions = nuts.dimensions
local tonut  = nuts.tonut
local tonode = nuts.tonode

local tasks = nodes.tasks

function handler(head)
   head = tonut(head)
   print('Width=' .. getdimensions(head, head)) // used to be 0 (as per luatex doc), now it’s most likely the natural width of the box.
   return tonode(head)
end

tasks.appendaction("processors", "after", "handler")
tasks.enableaction("processors", "handler")

\stopluacode

\starttext

Foo.

\stoptext



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Re: Change of nuts.dimensions function ?

[Hans Hagen]

On 2/7/2018 2:57 PM, Joseph Canedo wrote:
> Hello all,
> 
> It seems that with latest ConTeXt beta (with luatex 1.07.0) it seems 
> that nuts.dimensions function behaviour has changed. Simple MWE shows 
> the change.
> 
> Which function should be used now to get natural width of a range [n, t[ 
> of nodes please?
i'll check it but if you're on windows you're running the (currently 
very) experimental version which can actually be broken in some aspects 
(so you then need to update regularaly)

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Change of nuts.dimensions function ?

[Joseph Canedo]

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Hi Hans,
Thanks a lot, the function nuts.dimensions seems to work again as before.

Another issue I am seeing now is that for some reason the dir nodes push/pop are unbalanced. If I understand the logic of these whatsit nodes they behave like a stack to control the text direction, so I’d assume the number of push nodes and pop nodes is balanced. Currently I see 2 pop for 1 push in shipouts callback (but balanced pop/push nodes in processors callback). If that’s expected from now on I’ll change the logic in my handler.

Simple MWE that reproduces is attached.

Thanks
Best regards

Joseph

De : Hans Hagen
Envoyé le :jeudi 8 février 2018 10:14
À : ntg-context@ntg.nl
Objet :Re: [NTG-context] Change of nuts.dimensions function ?

On 2/7/2018 2:57 PM, Joseph Canedo wrote:
> Hello all,
> 
> It seems that with latest ConTeXt beta (with luatex 1.07.0) it seems 
> that nuts.dimensions function behaviour has changed. Simple MWE shows 
> the change.
> 
> Which function should be used now to get natural width of a range [n, t[ 
> of nodes please?
i'll check it but if you're on windows you're running the (currently 
very) experimental version which can actually be broken in some aspects 
(so you then need to update regularaly)

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________


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\startluacode

local nuts   = nodes.nuts
local tonut  = nuts.tonut
local tonode = nuts.tonode
local getfield = nuts.getfield
local getid = nuts.getid
local getnext = nuts.getnext
local getlist = nuts.getlist

local tasks = nodes.tasks
local nodecodes = nodes.nodecodes
local traverse_id = nuts.traverse_id
local dir_code = nodecodes.dir
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist

function handler(head)
   local found_dir = false
   head = tonut(head)
   for dir_node in traverse_id(dir_code, head) do
      local dir, level = getfield(dir_node, 'dir'), getfield(dir_node, 'level')
      if not found_dir then print('processor') found_dir = true end
      print('dir=' .. dir .. ' level=' .. level)
   end
   return tonode(head)
end

function list_handler(list, found_dir)
   local n = list
   while n do
      local id = getid(n)
      if id == hlist_code or id == vlist_code then list_handler(getlist(n), found_dir)
      elseif id == dir_code then
         local dir, level = getfield(n, 'dir'), getfield(n, 'level')
         if not found_dir then print('shipout') found_dir = true end
         print('dir=' .. dir .. ' level=' .. level)
      end
      n = getnext(n)
   end
end

function handler2(head)
   head = tonut(head)
   local found_dir = false
   list_handler(head, found_dir)
   return tonode(head)
end

tasks.appendaction("processors", "after", "handler")
tasks.enableaction("processors", "handler")

tasks.appendaction("shipouts", "after", "handler2")
tasks.enableaction("shipouts", "handler2")

\stopluacode

\starttext

Foo {\setupalign[r2l]Right to left} Bar.

Foo {\setupalign[r2l]Right {\setupalign[l2r]Left again} Right} Bar.

\stoptext

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: Change of nuts.dimensions function ?

[Hans Hagen]

On 2/15/2018 9:29 PM, Joseph Canedo wrote:
> Hi Hans,
> 
> Thanks a lot, the function nuts.dimensions seems to work again as before.
> 
> Another issue I am seeing now is that for some reason the dir nodes 
> push/pop are unbalanced. If I understand the logic of these whatsit 
> nodes they behave like a stack to control the text direction, so I’d 
> assume the number of push nodes and pop nodes is balanced. Currently I 
> see 2 pop for 1 push in shipouts callback (but balanced pop/push nodes 
> in processors callback). If that’s expected from now on I’ll change the 
> logic in my handler.
> 
> Simple MWE that reproduces is attached.

i get

dir=+TRT level=2
dir=-TRT level=1
processor
dir=+TRT level=2
dir=+TLT level=3
dir=-TLT level=2
dir=-TRT level=1
shipout
dir=+TRT level=2
dir=-TRT level=1
shipout
dir=+TRT level=2
dir=+TLT level=3
dir=-TLT level=2
dir=-TRT level=1

(latest experimental ... keep in mind that experimental is *not* really 
meant for production as it's the branch where we put in code that we 
work on .. it can even be a temporsary snapshot)

(btw, there is a preliminary bidi manual in the distribution which i use 
when testing some of the low level cleanup in progress)

> Thanks
> 
> Best regards
> 
> Joseph
> 
> *De : *Hans Hagen <mailto:pragma@wxs.nl>
> *Envoyé le :*jeudi 8 février 2018 10:14
> *À : *ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>
> *Objet :*Re: [NTG-context] Change of nuts.dimensions function ?
> 
> On 2/7/2018 2:57 PM, Joseph Canedo wrote:
> 
>  > Hello all,
> 
>  >
> 
>  > It seems that with latest ConTeXt beta (with luatex 1.07.0) it seems
> 
>  > that nuts.dimensions function behaviour has changed. Simple MWE shows
> 
>  > the change.
> 
>  >
> 
>  > Which function should be used now to get natural width of a range [n, t[
> 
>  > of nodes please?
> 
> i'll check it but if you're on windows you're running the (currently
> 
> very) experimental version which can actually be broken in some aspects
> 
> (so you then need to update regularaly)
> 
> Hans
> 
> -----------------------------------------------------------------
> 
>                                             Hans Hagen | PRAGMA ADE
> 
>                 Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> 
>          tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> 
> -----------------------------------------------------------------
> 
> ___________________________________________________________________________________
> 
> If your question is of interest to others as well, please add an entry 
> to the Wiki!
> 
> maillist : ntg-context@ntg.nl / 
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> 
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> 
> wiki     : http://contextgarden.net
> 
> ___________________________________________________________________________________
> 
> 
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
> 


-- 

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________