mailing-list for TeXmacs Users

[Joris van der Hoeven <address@hidden>]

> On Friday 18 July 2003 12:15, you wrote:
> | On Fri, Jul 18, 2003 at 11:09:10AM +0200, Benno Dielmann wrote:
> | > Hi all,
> | >
> | > perhaps my first attempt to get an answer to my question about 
> retrieving
> | > page numbers was not formulated clearly enough... So I give it another
> | > try:
> | >
> | > How do I retrieve the number of the actual page I'm on somwhere in the
> | > document body? The value of "thepage" or "page number" is always zero.
> |
> | I think it is not easy at the moment.
> |
> | The variables "thepage" and "page number" are only assigned when
> | building pages, that is after the page bodies have been typeset.
> | Currently they are only meant to be used in headers and footers (which
> | are typeset after page breaking).
> |
> | Page references use a special mechanism using an "auxilliary
> | collection" which you cannot access without special primitives or
> | glue, which AFAIK do not exist yet.
> |
> | It might be possible to do what you want with the following approach:
> |
> |   -- Define a function which uses a counter to produce unique labels.
> |
> |   -- Do some C++ and glue hacking to allow programmatic lookup in the
> |      "references" auxilliary collection (discussion of this should go
> |      on texmacs-dev).
> |
> |   -- Have this function access the auxilliary buffer (maybe using
> |      extern or a friend) to return a tree containing the page number
> |      of the current unique label.
> |
> |   -- Do not forget to "Update Buffer" when you want to get the page
> |      numbers right.
>
> Sound like some kind of hack... I'm writing my thesis now an definitively
> haven't got the time to try this out.
>
> I was trying to define some macro/function which does or does not display 
> some
> argument in dependency of the number of the actual page its call is on. This
> whould make page-referencing much more flexible.

Once again, from the users point of view, I do not see any problem:

>>> You should put yourself in page mode (you are probably in papyrus mode).
>>> Document -> Page -> Type -> Paper.