Re: lost colors (mkiv)

[Hans Hagen <pragma@wxs.nl>]

Peter Rolf wrote:
> Hi,
> 
> can anyone with an actual *luatex* test, if this fails (live ConTeXt is
> broken). My binaries are from the minimals at contextgarden (pragma
> tree), ConTeXt is the latest beta.

if you consider how color is implemented, this is actually not a bug

what do you expect in the following case ...

	\setbox\scratchbox{hi there}

	\hbox{\bf \copy\scratchbox}

till we had luatex, only fonts could be considered an attribute, and a 
rather limited one: each glyph node has a font id attached; luatex has a 
more generalized concept, attributes, and *each* node can have attributes

colors (and more) in mkiv are implemented using attributes and therefore 
things behave a bit different

i'm still not sure what mkiv should provide, since both methods have 
their (dis)advantages

and so it may not come as a surprise that there is some hackery around 
this compatibility issue ..

% engine=luatex

\setupcolors[state=start]

\enableattributeinheritance
\starttext

\newbox\TESTbox \setbox\TESTbox\hbox{Silence is sexy.}

\hbox{\color[red]{Silence is sexy.}{\color[blue]{Silence is sexy.}}}

\hbox{\color[red]{\attributedcopy\TESTbox}\color[blue]{\attributedbox\TESTbox}}

\stoptext

i may reimplement this at some point using the new attr feature that 
comes with boxes (i had no time yet)

when testing this a few minutes ago, i found out that this mechanisms 
was disabled; i uploaded a beta that should work ok

it will take a while before such thinsg are sorted out, esp because 
there is no best way, most logical approach, no method that makes most 
sense (which is also why it's left to macro packages to deal with it)

(btw, this phenomena is mentioned in mk.pdf, of which there is an 
updated version)

Hans


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                                           Hans Hagen | PRAGMA ADE
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