Re: lost colors (mkiv)

[Peter Rolf <indiego@gmx.net>]

Hans Hagen schrieb:
> 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
>
i agree that it's no bug, just different handling in comparison to mkii.
if i think about it, it works as it should. mhh, what are we talkin'
about ;)

> what do you expect in the following case ...
> 
> 	\setbox\scratchbox{hi there}
> 
> 	\hbox{\bf \copy\scratchbox}
>
i already trapped in this pitfall, so i'm aware of it :)

> 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}}
>
thanx for that. i'll change my code to make it mkiv compatible.

> \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)
>
for all interested the full link

http://www.pragma-ade.com/general/manuals/mk.pdf

very nice stuff for my laser.


best wishes, peter

> Hans
> 
> 
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
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