Re: [NTG-context] Getting width of text to be typeset
On 5/22/2020 19:49, Rik Kabel wrote:
If the OP simply wants the width of a string, one can use
\setwidthof#1\to#2.
\define\String{pqrs}
\setwidthof{\String}\to\Wdth
\String\ is \Wdth\ wide.
\setwidthof{{\tfb\em\String}}\to\Wdth
{\tfb\em\String} is \Wdth\ wide.
I do not know if that is different from the width of the same string
unboxed from the paragraph. There may be some adjustments made in
justification, expansion, and such that are not treated.
Correcting my post (thank you, Floris), the format is a bit different
than I had written. The following works:
\starttext
\define\String{pqrs}
\setwidthof\String\to\WdthA
{\String} is \WdthA\ wide.
\define\String{\tfx\em pqrs}
\setwidthof\String\to\WdthB
{\String} is \WdthB\ wide.
\define\String{\ss pqrs}
\setwidthof\String\to\WdthC
{\String} is \WdthC\ wide.
\stoptext
Giving:
--
Rik
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Re: [NTG-context] Getting width of text to be typeset
> On 23 May 2020, at 01:49, Rik Kabel wrote:
>
> If the OP simply wants the width of a string, one can use \setwidthof#1\to#2.
>
> \define\String{pqrs}
> \setwidthof{\String}\to\Wdth
> \String\ is \Wdth\ wide.
>
> \setwidthof{{\tfb\em\String}}\to\Wdth
> {\tfb\em\String} is \Wdth\ wide.
>
> I do not know if that is different from the width of the same string unboxed
> from the paragraph. There may be some adjustments made in justification,
> expansion, and such that are not treated.
Additionally: suppose I am in lua. Would it be possible to get the width (and
height) of a string back in lua as a value?
So, in lua something like this:
width = tex.widthofstring(“I have a string with some $\frac{1}2{}$ (math) in
it")
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Re: [NTG-context] Getting width of text to be typeset
On 5/22/2020 18:18, Hans Hagen wrote:
On 5/23/2020 12:03 AM, Hans Hagen wrote:
On 5/22/2020 11:22 AM, cont...@vivaldi.net wrote:
Hello,
is it possible to get somehow the width of the "material" (box?) of
the current line which is "ready" to be typeset?
See the case:
\starttext
some text
pqrs % Here I need to get width (or content) of the text from the
begin of the current line,
% i.e. width of the text "pqrs".
% (Depending of the width I will decide what to do later.)
\stoptext
I am too laical to know how to "inject" TeX workflow or whether to
access LuaTeX internals (nodes?) to get the desired information.
- Is it possible somehow?
Too easy ...
\startluacode
function document.whatever()
context(nodes.hpack(tex.getnest().head.next).width)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has
\the\scratchdimen\ width\par
}
\stoptext
but still you have to wikify it ... maybe i'll make it a low level
helper (but than you also need to wikify that because i have no clue
where to explain it)
Actually, one needs to flush a bit
\startluacode
function document.whatever()
local h = nodes.hpack(tex.getnest().head.next)
local w = h.width
h.list = nil
nodes.free(h)
context(w)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has \the\scratchdimen\
width\par
}
\stoptext
not that it matters much, because it's unlikely that you leak more
than a dozen nodes in a run.
Hans
If the OP simply wants the width of a string, one can use
\setwidthof#1\to#2.
\define\String{pqrs}
\setwidthof{\String}\to\Wdth
\String\ is \Wdth\ wide.
\setwidthof{{\tfb\em\String}}\to\Wdth
{\tfb\em\String} is \Wdth\ wide.
I do not know if that is different from the width of the same string
unboxed from the paragraph. There may be some adjustments made in
justification, expansion, and such that are not treated.
--
Rik
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Re: [NTG-context] Getting width of text to be typeset
On 5/23/2020 12:03 AM, Hans Hagen wrote:
On 5/22/2020 11:22 AM, cont...@vivaldi.net wrote:
Hello,
is it possible to get somehow the width of the "material" (box?) of
the current line which is "ready" to be typeset?
See the case:
\starttext
some text
pqrs % Here I need to get width (or content) of the text from the
begin of the current line,
% i.e. width of the text "pqrs".
% (Depending of the width I will decide what to do later.)
\stoptext
I am too laical to know how to "inject" TeX workflow or whether to
access LuaTeX internals (nodes?) to get the desired information.
- Is it possible somehow?
Too easy ...
\startluacode
function document.whatever()
context(nodes.hpack(tex.getnest().head.next).width)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has \the\scratchdimen\
width\par
}
\stoptext
but still you have to wikify it ... maybe i'll make it a low level
helper (but than you also need to wikify that because i have no clue
where to explain it)
Actually, one needs to flush a bit
\startluacode
function document.whatever()
local h = nodes.hpack(tex.getnest().head.next)
local w = h.width
h.list = nil
nodes.free(h)
context(w)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has \the\scratchdimen\
width\par
}
\stoptext
not that it matters much, because it's unlikely that you leak more than
a dozen nodes in a run.
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
-
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Re: [NTG-context] Getting width of text to be typeset
On 5/22/2020 11:22 AM, cont...@vivaldi.net wrote:
Hello,
is it possible to get somehow the width of the "material" (box?) of the
current line which is "ready" to be typeset?
See the case:
\starttext
some text
pqrs % Here I need to get width (or content) of the text from the
begin of the current line,
% i.e. width of the text "pqrs".
% (Depending of the width I will decide what to do later.)
\stoptext
I am too laical to know how to "inject" TeX workflow or whether to
access LuaTeX internals (nodes?) to get the desired information.
- Is it possible somehow?
Too easy ...
\startluacode
function document.whatever()
context(nodes.hpack(tex.getnest().head.next).width)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has \the\scratchdimen\
width\par
}
\stoptext
but still you have to wikify it ... maybe i'll make it a low level
helper (but than you also need to wikify that because i have no clue
where to explain it)
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
-
___
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Wiki!
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[NTG-context] Getting width of text to be typeset
Hello, is it possible to get somehow the width of the "material" (box?) of the current line which is "ready" to be typeset? See the case: \starttext some text pqrs % Here I need to get width (or content) of the text from the begin of the current line, % i.e. width of the text "pqrs". % (Depending of the width I will decide what to do later.) \stoptext I am too laical to know how to "inject" TeX workflow or whether to access LuaTeX internals (nodes?) to get the desired information. - Is it possible somehow? Best regards, Lukas ___ 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 ___
