Am 24.05.10 10:48, schrieb Wolfgang Schuster:
Hi Hans,
under certain circumstances document backgrounds (overlays) are lost.
A minimum real live example is this:
\definelayer[test]
\setuppagenumbering[alternative=doublesided]
\setupmakeup[standard][doublesided=empty] % background is lost
%\setupmakeup[standard][doublesided=yes] % background is visible
\startsetups[test]
\setlayer[test][hoffset=4cm,voffset=7cm]{\tfd text}
\stopsetups
\setupbackgrounds[page][background=test,setups=test]
\starttext
\startstandardmakeup
text
\stopstandardmakeup
test
\stoptext
With 'doublesided=yes' the background is visible but with
'doublesided=empty'
no background is shown.
I spend a few hours to find the reason for this and i was able to produce
a shorter example:
\defineoverlay[test][\tfd text]
\setupbackgrounds[page][background=test,state=repeat]
\starttext
text\page\page[blank]\null\page
%\chardef\pageornamentstate\zerocount
text
\stoptext
The problem is that '\page[blank]' sets \pageornamentstate at global
level to '1'.
I found a fix in a older ConTeXt version:
\def\dopagebreak[#1]% so, page ornaments are reset after a pagebreak
command, unless set
{\bgroup
\flushnotes
\edef\prevrealpageno{\the\realpageno}%
\ifcase\pageornamentstate \or
% disable reset after shipout
\global\chardef\pageornamentstate\plustwo
\fi
\iffirstargument % or if empty i.e. []
\executepagebreakhandlers{#1}%
\else % so, no pagebreak when \pagebreak[] ! ! !
\executepagebreakhandler\v!yes
\fi
\ifnum\prevrealpageno<\realpageno
\global\chardef\pageornamentstate\zerocount
\fi
\egroup}
Wolfgang
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