Re: [NTG-context] Vertical space around displayed formulas

[Otared Kavian]

Hi Hans,

Thanks for your attention which fixed most of the difficulties with vertical 
distances around math formulas.
However, after typesetting a long document, I noticed that there are still some 
incorrect behaviours. The following minimal example, extracted from that long 
document, shows what is wrong: please have a look at the second formula in the 
attached PDF. (The output with the older version from TeXLIve 2016 is correct).

%% begin vertical-space-bug.tex
\starttext

\input knuth.tex
\startformula
a \leq a_{n+1} \leq a_{n} \leq b_{n+1} \leq b_{n} \leq b, \qquad\mbox{et}\qquad 
0 \leq b_{n} - a_{n} \leq 2^{-n}(b_{0} - a_{0}).
\stopformula
\input ward.tex
\startformula
g(x_{*}) = \lim_{n\to\infty} g(a_{n}) \leq 0 \leq \lim_{n\to\infty} g(b_{n}) = 
g(x_{*}),
\stopformula
\input knuth.tex

\stoptext
%% end vertical-space-bug.tex



vertical-space-bug-2017-01-17.pdf
Description: Adobe PDF document


> On 18 Jan 2017, at 19:15, Hans Hagen  wrote:
> 
> On 1/18/2017 6:23 PM, Nicola wrote:
>> On 18/01/2017 17:53, Otared Kavian wrote:
>>> Hi Nicola,
>>> 
>>> In fact, if you are in a hurry and don’t use subtle things
>>> introduced  since May 2016, you can use the stable version of ConTeXt
>>> from TeXLive
>>> 2016 (the bug noticed by Mikael, and you, is absent from that version
>>> of ConTeXt).
>> 
>> Thanks, that's what I am doing now. Strangely enough, it fixes the
>> layout for all the slides, *except* the one I have posted before. But
>> that one I can easily fix.
> 
> the current (yesterdays) beta should be ok .. (the midpar flushing of a 
> formula)
> 
> a while ago i reimplemented spacing around display math and as a side effect 
> there might be slightly different spacing (in which case probably the old 
> situation was wrong
> 
> it relates to the fact that tex (traditionally) has some assumptions and does 
> some spacing that interferes with the way we want to control spacing (e.g. it 
> always forces baselineskips while we don't always want them) and it was close 
> to impossible to identify such cases robustly
> 
> (think of preceding lines with different depths)
> 
> recent luatex has ways to disable that so i could finally come up with 
> cleaner spacing models for display math
> 
> so, apart from bugs the current model is the one that will stay (or course 
> more control can be added)
> 
> 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] Vertical space around displayed formulas

[Hans Hagen]

On 1/18/2017 6:23 PM, Nicola wrote:

On 18/01/2017 17:53, Otared Kavian wrote:

Hi Nicola,

In fact, if you are in a hurry and don’t use subtle things
introduced  since May 2016, you can use the stable version of ConTeXt
from TeXLive
2016 (the bug noticed by Mikael, and you, is absent from that version
of ConTeXt).


Thanks, that's what I am doing now. Strangely enough, it fixes the
layout for all the slides, *except* the one I have posted before. But
that one I can easily fix.


the current (yesterdays) beta should be ok .. (the midpar flushing of a 
formula)


a while ago i reimplemented spacing around display math and as a side 
effect there might be slightly different spacing (in which case probably 
the old situation was wrong


it relates to the fact that tex (traditionally) has some assumptions and 
does some spacing that interferes with the way we want to control 
spacing (e.g. it always forces baselineskips while we don't always want 
them) and it was close to impossible to identify such cases robustly


(think of preceding lines with different depths)

recent luatex has ways to disable that so i could finally come up with 
cleaner spacing models for display math


so, apart from bugs the current model is the one that will stay (or 
course more control can be added)


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] Vertical space around displayed formulas

[Nicola]

On 18/01/2017 17:53, Otared Kavian wrote:

Hi Nicola,

In fact, if you are in a hurry and don’t use subtle things
introduced  since May 2016, you can use the stable version of ConTeXt from 
TeXLive
2016 (the bug noticed by Mikael, and you, is absent from that version of 
ConTeXt).


Thanks, that's what I am doing now. Strangely enough, it fixes the
layout for all the slides, *except* the one I have posted before. But
that one I can easily fix.

Nicola

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Re: [NTG-context] Vertical space around displayed formulas

[Otared Kavian]

Hi Nicola,

In fact, if you are in a hurry and don’t use subtle things introduced since May 
2016, you can use the stable version of ConTeXt from TeXLive 2016 (the bug 
noticed by Mikael, and you, is absent from that version of ConTeXt).

Best regards: OK

> On 18 Jan 2017, at 17:26, Nicola  wrote:
> 
> On 18/01/2017 16:53, Otared Kavian wrote:
>> Hi Nicola,
>> 
>> Indeed there is a recent bug, reported by Mikael Sundqvist a few days ago, 
>> and Hans is aware of this.
>> Hans said in the next release of ConTeXt beta the issue will be fixed.
> 
> Sorry, I hadn't noticed the other thread. I'll wait for the next beta then.
> 
> Thanks!
> Nicola
> 
> 
> ___
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Re: [NTG-context] Vertical space around displayed formulas

[Nicola]

On 18/01/2017 16:53, Otared Kavian wrote:

Hi Nicola,

Indeed there is a recent bug, reported by Mikael Sundqvist a few days ago, and 
Hans is aware of this.
Hans said in the next release of ConTeXt beta the issue will be fixed.


Sorry, I hadn't noticed the other thread. I'll wait for the next beta then.

Thanks!
Nicola


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Re: [NTG-context] Vertical space around displayed formulas

[Otared Kavian]

Hi Nicola,

Indeed there is a recent bug, reported by Mikael Sundqvist a few days ago, and 
Hans is aware of this. 
Hans said in the next release of ConTeXt beta the issue will be fixed.

Best regards: OK

> On 18 Jan 2017, at 16:00, Nicola  wrote:
> 
> Hello,
> has something been changed in the last few months in the vertical
> spacing of displayed formulas, frames or other environments?
> 
> I am re-typesetting some presentations using the latest beta and the
> content of slides (especially those containing formulas) now tends to
> flow to the next page, while before it used to fit in one page.
> 
> I paste below an example, if that helps. I am using a system font,
> so you may not be able to reproduce my problem without it.
> 
> Is there something I should change in my documents?
> 
> Nicola
> 
> %%
> \setuppapersize[S6][S6]
> 
> \setuplayout[
>  width=middle,
>  height=middle,
>  topspace=2mm,
>  header=0mm,
>  headerdistance=0mm,
>  location=singlesided,
>  backspace=5mm,
>  margin=0mm,
>  edgedistance=0mm,
>  margindistance=0mm
> ]
> 
> \setupalign[nothyphenated,flushleft]
> 
> % Ocean Sunset (color.adobe.com)
> \definecolor[colorone][r=0.251, g=0.349, b=0.322]
> \definecolor[colortwo][r=0.612, g=0.608, b=0.478]
> \definecolor[colorthree]  [r=1.0,   g=0.827, b=0.576]
> \definecolor[colorfour]   [r=1.0,   g=0.592, b=0.310]
> \definecolor[colorfive]   [r=0.960, g=0.310, b=0.161] %t=0.8 , a=multiply]
> \definecolor[nearlywhite] [s=0.996]
> 
> % Fonts
> \definefontfamily[slidesfont][serif][Avenir] [
>  tf=name:Avenir Light,
>  it=name:Avenir Light Oblique,
>  bf=name:Avenir Heavy,
>  bi=name:Avenir Heavy Oblique
> ]
> \definefontfamily[slidesfont][sans][Avenir] [
>  tf=name:Avenir Light,
>  it=name:Avenir Light Oblique,
>  bf=name:Avenir Heavy,
>  bi=name:Avenir Heavy Oblique
> ]
> \definefallbackfamily[slidesfont][mono][Xits][range={"0222A,"02229,"02205}] % 
> ∪, ∩, ∅
> \definefontfamily[slidesfont][mono][Latin Modern Mono Light][features=none]
> \definefallbackfamily[slidesfont][math][Xits][range={"025C7,"27D5}] % WHITE 
> DIAMOND, left-join, WHITE RIGHT-POINTING TRIANGLE
> \definefontfamily[slidesfont][math][TeX Gyre Pagella Math]
> 
> \setupbodyfont[slidesfont]
> 
> % Foreground/background color
> \setupcolors[textcolor=colorone]
> \setupbackgrounds[page][background=color, backgroundcolor=nearlywhite]
> 
> % Header
> \startreusableMPgraphic{header:background}
>  fill OverlayBox
>leftenlarged BackSpace
>rightenlarged CutSpace
>topenlarged TopSpace
>withcolor OverlayColor ;
>  setbounds currentpicture to OverlayBox
>enlarged max(BackSpace,CutSpace) ;
> \stopreusableMPgraphic
> 
> \defineoverlay[header:background][\reuseMPgraphic{header:background}]
> 
> \define[2]\MySlide{\framed[
>  frame=off,
>  background=header:background,
>  backgroundcolor=colorfive,
>  width=\textwidth,
>  align=flushleft
> ]{#2}}
> 
> \definehead[slide][subject]
> \setuphead[slide][
>  style=\ssb,
>  command=\MySlide,
>  color=nearlywhite,
>  insidesection=\doifnot{\structureuservariable{align}}{top}\vfill,
>  aftersection=\doifnot{\structureuservariable{align}}{top}\vfill,
>  page=yes,
> ]
> 
> % Footer
> \setuppagenumbering[location=]
> \setupfooter[style=small, color=colortwo]
> \setupfootertexts[][\userpagenumber/\lastuserpage]
> 
> % Lists
> \startuseMPgraphic{itemize:main}
>  save p; path p;
>  p := fullcircle scaled 1.5ExHeight;
>  fill p withcolor \MPcolor{colorfive};
> \stopuseMPgraphic
> 
> \startuseMPgraphic{itemize:nested}
>  save p; path p;
>  p := ((0,-0.5)--(0,0.5)--(0.866,0)--cycle) scaled 1.5ExHeight;
>  fill p withcolor \MPcolor{colorfive};
> \stopuseMPgraphic
> 
> \definesymbol[itemize:main][\useMPgraphic{itemize:main}]
> \definesymbol[itemize:nested][\useMPgraphic{itemize:nested}]
> 
> \setupitemize[1][symbol=itemize:main]
> \setupitemize[2][symbol=itemize:nested, width=1.5ex]
> \setupitemize[2][nowhite]
> 
> \setupitemize[
>  headstyle=\ssa,
>  headcolor=colorfive,
>  afterhead={\blank[none]},
>  inbetween={\blank[big]},
>  leftmargin=1em,
>  rightmargin=1em,
> ]
> 
> % Tables
> \setuptables[rulethickness=0.06em]
> 
> \setupinteraction[state=start,  % make hyperlinks active, etc.
>  style=\tf,
>  color=colortwo,
>  title={What Do You Mean, “Null”?},
>  author={Nicola Vitacolonna},
>  keyword={null}]
> 
> % \usebtxdataset[main.bib]
> % \usebtxdefinitions[apa]
> \setupcombinations[distance=3cm,location=top]
> \defineframedcontent[tablebackground][frame=off,background=color,backgroundcolor=colorthree]
> \setuptables[rulethickness=0.06em,frame=tablebackground]
> 
> \setupalign[nothyphenated,flushleft]
> 
> \defineparagraphs[twocol][n=2]
> \setupparagraphs[twocol][1][width=.7\textwidth]
> 
> 
> \starttext
> \switchtobodyfont[17.3pt]
> 
> \startslide[title={Which Nulls?}][align=top]
>  All of the above may be abstracted into three categories:
> 
>  \startitemize[packed]
>\item
>Exists, but unknown