[NTG-context] How to obtain the hbox's node when there is only one hbox for an entire paragraph?
Dear list,
What is the non-hacking way to obtain the hbox's node in a Lua hook
when there is only one hbox for an entire paragraph?
Best regards,
Huang Fusyong (黄复雄)
% start ConTeXt
\startluacode
Moduledata = Moduledata or {}
Moduledata.jiazhu = Moduledata.jiazhu or {}
---[[
local function show_detail(n, label)
local l = label or "==="
print(">"..l.."<<")
print(nodes.toutf(n))
for i in node.traverse(n) do
local char
if i.id == nodes.nodecodes.glyph then
char = utf8.char(i.char)
print(i, char)
elseif i.id == nodes.nodecodes.penalty then
print(i, i.penalty)
elseif i.id == nodes.nodecodes.glue then
print(i, i.width, i.stretch, i.shrink, i.stretchorder,
i.shrinkorder)
elseif i.id == nodes.nodecodes.hlist then
print(i,
nodes.toutf(i.list),i.width,i.height,i.depth,i.shift,i.glue_set,i.glue_sign,i.glue_order)
elseif i.id == nodes.nodecodes.kern then
print(i, i.kern, i.expension)
else
print(i)
end
end
end
--]]
function Moduledata.jiazhu.main(head)
show_detail(head,"head")
return head, true
end
nodes.tasks.appendaction("processors", "after", "Moduledata.jiazhu.main")
\stopluacode
\starttext
\hbox{a b c}
% The result is as follows (without the I expected)：
% >head<<
% a b c
%3448 : glyph unset> a
%3702 : glue spaceskip>261738
130869 87246 0 0
%3484 : glyph unset> b
%3716 : glue spaceskip>261738
130869 87246 0 0
% nil : glyph unset> c
~\hbox{a b c}
% Hacking with the `~`, the result is as follows (containing the
I expected):
% >head<<
% a b c
%3377 : glyph unset> a
%3733 : glue spaceskip>261738
130869 87246 0 0
%3491 : glyph unset> b
%3747 : glue spaceskip>261738
130869 87246 0 0
% nil : glyph unset> c
% >head<<
% a b c
%3484 : par vmodepar>
%2208 : glue indentskip> 0 0
0 0 0
%3498 : penalty userpenalty> 1
%3325 : glue spaceskip>261738
130869 87246 0 0
%3441 : hlist box> a b c 1702476
545484 86460 nil nil nil
nil : glue spaceskip>261738 130869 87246 0 0
\stoptext
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[NTG-context] Re: \par and \startlines
Am 01.05.24 um 09:44 schrieb Wolfgang Schuster: but that should be sufficient, but to repeat Hraban's question: What would be the advantage of using the format module? The module provides features like - alignment of the verse lines - numbering of the lines (which isn't supported by \startlines unless you add the normal linenumbering mechanism) - support for lines which don't fit on a single page where the consecutive lines are indented but the module is outdated and relies on an old mkii style code base. A big difference between the \startlines environment and the format module is that the first treats each line in the input file as a separate line in the output while the format module requires begin/end tags for each line which works better for xml input. Thank you! Doesn’t sound like I should use it… Hraban ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: \par and \startlines
denisma...@mailbox.org schrieb am 30.04.2024 um 14:28:
-Ursprüngliche Nachricht-
Von: Wolfgang Schuster
Gesendet: Samstag, 27. April 2024 07:40
An: Denis Maier
Cc: mailing list for ConTeXt users
Betreff: Re: [NTG-context] Re: \par and \startlines
Denis Maier schrieb am 26.04.2024 um 19:52:
I see. But there's no command that could be used to simulate an empty line?
If not, me should I perhaps try to replicate the wrapper structure
from the XML source in context? (I'll also look into the format module
of
course.) What do you think?
Below is a different solution to your problem with works without \startlines
because you already mark up each individual line in the poem which make it
possible to add a linebreak in the output.
With \blank options (samepage) you can avoid pagebreaks between stanzas.
\startxmlsetups xml:test
\xmlsetsetup{#1}{*}{-}
\xmlsetsetup{#1}{doc|poem|stanza|line}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test}
\startxmlsetups xml:doc
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:poem
\blank[line]
\xmlflush{#1}
\blank[back,line]
\stopxmlsetups
\startxmlsetups xml:stanza
\xmlflush{#1}\blank[preference,line]
\stopxmlsetups
\startxmlsetups xml:line
\xmlflush{#1}\blank[samepage,none]
\stopxmlsetups
\startbuffer[test]
The
lines
are
there!
The
lines
are
there!
The
lines
are
there!
\stopbuffer
\starttext
\samplefile{lorem}
\xmlprocessbuffer{test}{test}{}
\samplefile{lorem}
\stoptext
Thanks for this solution. I've had a quick look, and it seems to do exactly
what I need. My requirements are rather simple at the moment, but that should
be sufficient, but to repeat Hraban's question: What would be the advantage of
using the format module?
The module provides features like
- alignment of the verse lines
- numbering of the lines (which isn't supported by \startlines
unless you add the normal linenumbering mechanism)
- support for lines which don't fit on a single page where the
consecutive lines are indented
but the module is outdated and relies on an old mkii style code base.
A big difference between the \startlines environment and the format
module is that the first treats
each line in the input file as a separate line in the output while the
format module requires begin/end
tags for each line which works better for xml input.
Wolfgang
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Wiki!
maillist : ntg-context@ntg.nl /
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