Chris Rowley wrote:

Taco wrote --

...

When replying, please edit your Subject line so it is more specific Hans and I are working on a new feature we call "attributes".

Sounds like the idea we talked about in ... somewhere ...??

dunno, the name attribute is rather generic -)

So is this an arbitrary dictionary (list of name, value pairs?

no, currently just an array of numbers attached to each node, the index in the attribute attr 1, value 10 attr 5, value 32 so, when attr 5 deals with color, teh value 10 can represent a specific color; eventually this will result in a pdfliteral or special to be inserted but that's up to the user (macro writer); such insertion can take place for instance at shipout time by manipulating the final node list (then typeset content)

...

An attribute is an item that becomes attached to the actual nodes that are to be typeset.

But what is a `node to be typeset'? Or is this deliberately vague?

the node lists at each stage ... after boxing, before line breaking, what enters the output routine (linebreaking done then);

Anything in an hlist or vlist? Or only character(/glyph??) nodes?

anything ... glyphs, glue, penalty, whatsits, h/vlists ... luatex only provides generic mechanisms are provided, (i.e. opens up the engine and adds a few features that we think that should be there); one can use attributes to implement for instance color, but the actual implementation is up to the macro package writer (ok, i will probably provide some generic code, but even then, the interfaces on top of that may differ) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------