mathcolor attribute in MathML (mkiv)

mathcolor attribute in MathML (mkiv)

[Duncan Hothersall]

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Hello list.

I'm trying to use colour in some MathML formulae using the mathcolor
attribute. It seems to have no effect on the output. I can
see \applymmlmathcolor in the x-mathml.mkiv source but I can't see how to
make it work. Does anyone have any pointers?

(Does lmtx support this?)

Thanks.

Duncan

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Re: mathcolor attribute in MathML (mkiv)

[Hans Hagen]

On 5/27/2021 5:47 PM, Duncan Hothersall wrote:
> Hello list.
> 
> I'm trying to use colour in some MathML formulae using the mathcolor 
> attribute. It seems to have no effect on the output. I can 
> see \applymmlmathcolor in the x-mathml.mkiv source but I can't see how 
> to make it work. Does anyone have any pointers?
> 
> (Does lmtx support this?)
MWE needed

-----------------------------------------------------------------
                                           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: mathcolor attribute in MathML (mkiv)

[Duncan Hothersall]

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Apologies Hans.

MWE:

\usemodule[newmml]
\starttext
\xmlprocessdata{}{<formula>
 <math xmlns='http://www.w3.org/1998/Math/MathML'>
  <mi>E</mi>
  <mfenced>
    <mo mathcolor="red">π</mo>
  </mfenced>
 </math>
</formula>}{}
\stoptext

The π symbol does not show in red.

Duncan


On Thu, 27 May 2021 at 17:18, Hans Hagen <j.hagen@xs4all.nl> wrote:

> On 5/27/2021 5:47 PM, Duncan Hothersall wrote:
> > Hello list.
> >
> > I'm trying to use colour in some MathML formulae using the mathcolor
> > attribute. It seems to have no effect on the output. I can
> > see \applymmlmathcolor in the x-mathml.mkiv source but I can't see how
> > to make it work. Does anyone have any pointers?
> >
> > (Does lmtx support this?)
> MWE needed
>
> -----------------------------------------------------------------
>                                            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: mathcolor attribute in MathML (mkiv)

[Hans Hagen]

On 5/27/2021 6:30 PM, Duncan Hothersall wrote:
> Apologies Hans.
> 
> MWE:
> 
> \usemodule[newmml]
> \starttext
> \xmlprocessdata{}{<formula>
>   <math xmlns='http://www.w3.org/1998/Math/MathML 
> <http://www.w3.org/1998/Math/MathML>'>
>    <mi>E</mi>
>    <mfenced>
>      <mo mathcolor="red">π</mo>
>    </mfenced>
>   </math>
> </formula>}{}
> \stoptext
> 
> The π symbol does not show in red.
Kind of trivial ... i'll send you a patched module.

If you want you can check with the standard and see where we need to add 
it. I'll then adapt the mkiv file before taking a look at upgrading the 
lmtx one.

For decades this mathml stuff has been a bit of a pain, because when one 
uses it for a mixed web / text project one always needs to satisfy the 
latest greatest either or not bugged web rendering, it disappearing from 
browsers, coming back, rendered remote or in the browser, mixed 
(in/with) asciimath which has its own tweaks. A pitty that content 
mathml never took off, probbably also due to the failure of openmath 
which took away attention from it and that we actually sort of 
support(ed). So when it comes to (reasonable quality) rendering in print 
one always runs a bit behind.

I'm also always a bit hesitant to touch the code because it's actually 
used by a collegue in some (zero budget, so me looking at the mml is 
just hobbying) projects concerning math school books where often the web 
part controls the limitations and enforces weird coding (tens of 
thousands of files with plenty mathml). Btw, especially symbols are a 
mess and interfere with assumed structure, so that's always tricky to 
touch. Especially when you want to have it specific for (mid/high) 
school math.

But anyway things like a bit of color and so are not that hard to 
support (more a matter of making sure performance is not hit).

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: mathcolor attribute in MathML (mkiv)

[Duncan Hothersall]

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Understood and appreciated, Hans, and many thanks for the patch which I
will be testing shortly.

Completely agree re the real world of MathML. We are still converting our
MathML masters to other formats after many years for various uses and fixes
because of the situation you describe with patchy and dodgy support
especially in the browser world. Maths on the web is still a little bit
wild west.

Thanks again.

Duncan

On Thu, 27 May 2021 at 18:00, Hans Hagen <j.hagen@xs4all.nl> wrote:

> On 5/27/2021 6:30 PM, Duncan Hothersall wrote:
> > Apologies Hans.
> >
> > MWE:
> >
> > \usemodule[newmml]
> > \starttext
> > \xmlprocessdata{}{<formula>
> >   <math xmlns='http://www.w3.org/1998/Math/MathML
> > <http://www.w3.org/1998/Math/MathML>'>
> >    <mi>E</mi>
> >    <mfenced>
> >      <mo mathcolor="red">π</mo>
> >    </mfenced>
> >   </math>
> > </formula>}{}
> > \stoptext
> >
> > The π symbol does not show in red.
> Kind of trivial ... i'll send you a patched module.
>
> If you want you can check with the standard and see where we need to add
> it. I'll then adapt the mkiv file before taking a look at upgrading the
> lmtx one.
>
> For decades this mathml stuff has been a bit of a pain, because when one
> uses it for a mixed web / text project one always needs to satisfy the
> latest greatest either or not bugged web rendering, it disappearing from
> browsers, coming back, rendered remote or in the browser, mixed
> (in/with) asciimath which has its own tweaks. A pitty that content
> mathml never took off, probbably also due to the failure of openmath
> which took away attention from it and that we actually sort of
> support(ed). So when it comes to (reasonable quality) rendering in print
> one always runs a bit behind.
>
> I'm also always a bit hesitant to touch the code because it's actually
> used by a collegue in some (zero budget, so me looking at the mml is
> just hobbying) projects concerning math school books where often the web
> part controls the limitations and enforces weird coding (tens of
> thousands of files with plenty mathml). Btw, especially symbols are a
> mess and interfere with assumed structure, so that's always tricky to
> touch. Especially when you want to have it specific for (mid/high)
> school math.
>
> But anyway things like a bit of color and so are not that hard to
> support (more a matter of making sure performance is not hit).
>
> 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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___________________________________________________________________________________
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
___________________________________________________________________________________