Re: [NTG-context] Count (and limit) glyphs per line?
I've been confronted with the following 'intriguing' formatting requirement for
a document:
"Intriguing" is definitely right here. I suspect these guidelines were
made for typewriters and haven't been updated since.
to limit the number of glyphs per line to 112.
112 characters per line sounds much too long anyways.
From "The Elements of Typographic Style":
> Anything from 45 to 75 characters is widely regarded as a satisfactory
> length of line for a single-column page set in a serifed text face
> in a text size. The 66-character line (counting both letters and
> spaces) is widely regarded as ideal. For multiple-column work, a
> better average is 40 to 50 characters.
>
> If the type is well set and printed, lines of 85 or 90 characters
> will pose no problem in discontinuous texts, such as bibliographies,
> or, with generous leading, in footnotes. But even with generous
> leading, a line that averages more than 75 or so characters is likely
> to be too long for continuous reading.
If you use something like
\setuplayout[width=80\averagecharwidth]
then your lines will for sure have fewer than 112 characters and will
probably be more readable too.
I'm nevertheless curious if there is a Lua/TeX solution to this "problem"?
Option 1: Use a monospaced font. Then 112 characters per line <=> page
width = 112em.
Option 2: A hacky Lua solution
\startluacode
local max_length = 112
local glyph_id = node.id "glyph"
local disc_id = node.id "disc"
local glue_id = node.id "glue"
function userdata.limiter(head)
language.hyphenate(head)
local chars = 0
local width = 0
local n = head
while n do
if n.id == glyph_id or n.id == glue_id then
chars = chars + 1
width = width + n.width - (n.shrink or 0)
end
if chars >= max_length or width > tex.hsize then
local back_chars = 0
local end_disc = nil
while n do
if n.id == glue_id then
local penalty = node.new "penalty"
penalty.penalty = -1
node.insertbefore(head, n, penalty)
break
end
if not end_disc and n.id == disc_id then
end_disc = n
end
if end_disc and back_chars >= 5 then
end_disc.penalty = -1
break
end
if n.id == glyph_id then
back_chars = back_chars + 1
end
n = n.prev
end
width = 0
chars = 0
end
n = n.next
end
return head
end
nodes.tasks.appendaction(
"processors",
"before",
"userdata.limiter"
)
\stopluacode
\setuppapersize[landscape,letter]
\showframe
\starttext
\setupalign[flushleft]
\setupbodyfont[14pt]
\samplefile{knuth}
\setupbodyfont[12pt]
\samplefile{knuth}
\setupbodyfont[10pt]
\samplefile{knuth}
\page
\setupalign[normal]
\setupbodyfont[14pt]
\samplefile{knuth}
\setupbodyfont[12pt]
\samplefile{knuth}
\setupbodyfont[10pt]
\samplefile{knuth}
\stoptext
This code will ensure that no line ever exceeds "max_length" characters.
It uses a greedy algorithm instead of the standard TeX algorithm for
line breaking, but it still produces mostly decent results.
-- Max
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Re: [NTG-context] Failing \doifemptyelse
Hans Hagen via ntg-context schrieb am 23.06.2022 um 23:00:
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the
else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number}
\crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
there's also
\doifelsevariable {Test} {Number}
that can be used
in this case
\doifelseemptyvariable{Test}{Number}{...}{...}
is the better choice
Wolfgang
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[NTG-context] Count (and limit) glyphs per line?
Dear list, I've been confronted with the following 'intriguing' formatting requirement for a document: " • Type density: Must be no more than 15 characters per linear inch (including characters and spaces). • Line spacing: Must be no more than six lines per vertical inch. " While the line spacing resolves in ConTeXt to \setupinterlinespace[line=\dimexpr(1in / 6)] I was wondering if one can limit "type density" as the number of glyphs per inch in TeX too? I thought, it is more convenient to rephrase this request (for a 7 in textwidth) to limit the number of glyphs per line to 112. (Font must be sans or serif, of course ...) I've tried \setuplayout[width=112\averagecharwidth] which, however, results in ~120–130 characters and spaces per line. Pragmatically, I'm narrowing the text width to empirically match the requirement, but I'm nevertheless curious if there is a Lua/TeX solution to this "problem"? Thank you! Benjamin ___ 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 ___
[NTG-context] Detailed citation of reference
Hi there, using \cite[myreference] I will get a result like "[1]", or I could also change the "1" into some more detailed information such as a tag. However, I want to obtain something like "[1, section 2.1]". How can I achieve this? Thank you very much, Johann ___ 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 ___
Re: [NTG-context] Failing \doifemptyelse
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
there's also
\doifelsevariable {Test} {Number}
that can be used
-
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] Failing \doifemptyelse
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
because that one doesn't expand the argument
\doifelsenothing
\doifelsesomething
\doifnothing
\doifsomething
can be used for your purpose
-
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] Failing \doifemptyelse
Willi Egger via ntg-context schrieb am 23.06.2022 um 21:16:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\doifempty(else) doesn't expand the argument and any argument counts as
not empty. To satisfy the command you can expand the first argument
(\normalexpanded) or you use \doifnothing(else) which expands the argument.
\starttext
\startbuffer
\doifemptyelse{}{YES}{NO}
\doifemptyelse{\empty}{YES}{NO}
\normalexpanded{\doifemptyelse{}}{YES}{NO}
\normalexpanded{\doifemptyelse{\empty}}{YES}{NO}
\doifnothingelse{}{YES}{NO}
\doifnothingelse{\empty}{YES}{NO}
\stopbuffer
\typebuffer \getbuffer
\stoptext
Wolfgang
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[NTG-context] Failing \doifemptyelse
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
I am using ConTeXt version 2022.05.11 11:36 LMTX fmt: 2022.6.15
Kind regards
Willi
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Re: [NTG-context] colors and contours in luametafun
On 6/20/2022 6:29 PM, Jacob Kauffmann via ntg-context wrote:
Dear list,
Am 01.09.2021 um 09:54 schrieb Jacob Kauffmann via ntg-context
:
- color by value in lmt_surface
We want to show a surface plot of a function where the color indicates the
function value (instead, or in addition to a light source).
The easiest would be to have variable cf for the brightness factor (as it is),
and in addition variables such as zt, minz, maxz, akin to the color formatter
for lmt_contour.
This becomes handy when colors are to be aligned with function values (e.g.
negative = blue, zero = white, positive = red, see MWE attached).
I managed to achieve this by tweaking f_color and mp.lmt_surface_do in
mlib-cnt.lmt in
ConTeXt ver: 2022.05.11 11:36 LMTX fmt: 2022.6.20
a bit.
Please find the diff and a MWE attached.
in next version (next time just send me the file, easier than a diff)
Cheers,
Jacob Kauffmann
--- context/tex/texmf-context/tex/context/base/mkxl/mlib-cnt.lmt 2022-06-20
18:11:51.0 +0200
+++ mlib-cnt.lmt2022-06-20 18:26:22.0 +0200
@@ -1839,7 +1839,29 @@
local f_color = formatters [ [[
local math = math
-return function(f)
+local min = math.min
+local max = math.max
+local abs = math.abs
+local minz = %s
+local maxz = %s
+
+local color_value = 0
+local color_step = mp.lmt_color_functions.step
+local color_shade = mp.lmt_color_functions.shade
+
+local function step(...)
+return color_step(color_value,n,...)
+end
+local function shade(...)
+return color_shade(color_value,n,...)
+end
+-- local function lin(l)
+-- return l/n
+-- end
+%s
+return function(z, f)
+function_value = z
+brightness_factor = f
return %s
end
]] ]
@@ -1898,7 +1920,7 @@
local dy = (ymax - ymin) / ny
local xt = xmin
--
-local minf, maxf
+local minf, maxf, minz, maxz
--
-- similar as contours but no data loop here
--
@@ -1908,12 +1930,6 @@
return false -- fatal error
end
--
-local ccode = load(f_color(colorcode))
-local color = type(ccode) == "function" and ccode()
-if type(color) ~= "function" then
-return false -- fatal error
-end
---
for i=0,nx do
local yt = ymin
for j=0,ny do
@@ -1946,7 +1962,16 @@
maxf = fac
end
--
-data[i][j] = { x, y, fac }
+if not minz then
+ minz = z
+ maxz = z
+elseif z < minz then
+ minz = z
+elseif z > maxz then
+ maxz = z
+end
+--
+data[i][j] = { x, y, fac, z }
--
yt = yt + dy
end
@@ -1957,6 +1982,16 @@
local range = maxf - minf
local cl = linecolor or 1
local enforce = attributes.colors.model == "cmyk"
+--
+-- local ccode = load(f_color(colorcode))
+report("minz, maxz is (%s,%s)",minz,maxz)
+report("colorcode is %s", colorcode)
+local ccode = load(f_color(minz, maxz, preamble, colorcode))
+local color = type(ccode) == "function" and ccode()
+if type(color) ~= "function" then
+return false -- fatal error
+end
+--
for i=0,nx-1 do
for j=0,ny-1 do
-- points
@@ -1985,12 +2020,13 @@
local z32 = z3[2]
local z41 = z4[1]
local z42 = z4[2]
+local zout = z1[4]
-- if lines then
-- -- fill first and draw then, previous shapes can be covered
-- else
-- -- fill and draw in one go to prevent artifacts
-- end
-local cr, cg, cb = color(cf)
+local cr, cg, cb = color(zout, cf)
if not cr then cr = 0 end
if not cg then cg = 0 end
if not cb then cb = 0 end
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--
-
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tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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[NTG-context] missing mails
Hi, I just found otu that the majority of the mailing list mails ended up in a different mail box (som,ehoe thunderbird has problems with two accounts being subscribed to the same list). So, if there has been serious issues not resolved (the last year) let me know. A quick checked that most got answered in some way, 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 ___
Re: [NTG-context] Graphviz and ConTeXt
Hi,
You could just convert these separately to pdf/svg/jpg/png and then load them
as \externalfigure.
You could also use the filter module to be able to take them inline into the
ConTeXt code:
\usemodule[filter]
\define[1]\ReadFigure{\externalfigure[#1]}
\defineexternalfilter[graphviz]
[cache=yes,
readcommand=\ReadFigure,
output={\externalfilterbasefile.pdf},
filtercommand={dot -Tpdf -o "\externalfilterbasefile.pdf"
"\externalfilterinputfile"}]
\starttext
\startTEXpage
\startgraphviz
digraph G {
main -> parse -> execute;
main -> init;
main -> cleanup;
execute -> make_string;
execute -> printf
init -> make_string;
main -> printf;
execute -> compare;
}
\stopgraphviz
\stopTEXpage
\stoptext
See the filter module documentation for more details about that.
Best wishes,
Taco
> On 23 Jun 2022, at 14:08, juh via ntg-context wrote:
>
> Dear all,
>
> I have a legacy project that I shall convert to a new ConTeXt project.
>
> There are a lot of Graphviz dot-files. What shall I do with these?
>
> Any hints?
> juh
> --
> Autoren-Homepage: . http://literatur.hasecke.com
> Satiren & Essays: . http://www.sudelbuch.de
> Privater Blog: http://www.hasecke.eu
> Netzliteratur-Projekt: http://www.generationenprojekt.de
>
>
> ___
> 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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> ___
—
Taco Hoekwater E: t...@bittext.nl
genderfluid (all pronouns)
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[NTG-context] Graphviz and ConTeXt
Dear all, I have a legacy project that I shall convert to a new ConTeXt project. There are a lot of Graphviz dot-files. What shall I do with these? Any hints? juh -- Autoren-Homepage: . http://literatur.hasecke.com Satiren & Essays: . http://www.sudelbuch.de Privater Blog: http://www.hasecke.eu Netzliteratur-Projekt: http://www.generationenprojekt.de signature.asc Description: PGP signature ___ 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 ___
