[XeTeX] wanted: \vadjust pre

[Jonathan Kew]

On 25 Aug 2008, at 2:26 AM, Vladimir Volovich wrote:

> Hi Jonathan!
>
> xetex includes etex extensions, as well as several extensions from
> pdftex (e.g. \pdfsavepos & friends). however, the following useful
> extension is not implemented (the following is an excerpt from the
> pdftex users manual):
>
>  \vadjust [ pre spec ] filler { vertical mode material }
>
>  The \vadjust implementation of pdfTEX adds an optional qualifier pre
>  spec (which is the string pre) to the original TEX primitive with the
>  same name. As long as there is no pre given, \vadjust behaves  
> exactly as
>  the original (see the TEXbook, p. 281); it appends an adjustment item
>  created from vertical mode material to the current list after the  
> line
>  in which \vadjust appears. However with the qualifier pre, the
>  adjustment item is put before the line in which \vadjust pre appears.
>
> could you please consider adding it to xetex (and maybe some other
> "general purpose extensions" mentioned in pdftex manual)?

Hi Vladimir,

Yes, that does sound useful. I wasn't aware of it, but will take a  
look and hope it can be included. Could you file a feature request on  
the sourceforge.net tracker, so it doesn't get forgotten? Thanks!

JK