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%D \module
%D [ file=prop-mis,
%D version=2004.05.29, % some code moved from private modules
%D title=\CONTEXT\ Property Macros,
%D subtitle=Miscelaneous,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Property Macros / Miscelaneous}
%D This module contains some code that has been in use in some
%D private modules (p-*). These features depend on the fact
%D that pdftex writes the page content as one stream.
%D EXPERIMENTAL
\unprotect
%D Stream based overprint and knockout:
\defineproperty[\v!overprint][\s!overprint] [\c!method=\v!command]
\defineproperty[\v!knockout] [\s!overprint] [\c!method=\v!command]
%D Negation.
\defineproperty [\v!negative] [\s!negative] [\c!method=\v!command]
\defineproperty [\v!positive] [\s!negative] [\c!method=\v!command]
%D Special font effects.
\setupproperty
[\s!effect]
[\c!rulethickness=\zeropoint,
\c!stretch=0]
\defineproperty [\v!inner] [\s!effect] [\c!rulethickness=.25pt]
\defineproperty [\v!outer] [\s!effect] [\c!rulethickness=.25pt]
\defineproperty [\v!both] [\s!effect] [\c!rulethickness=.25pt]
\defineproperty [\v!normal] [\s!effect]
\defineproperty [\v!hidden] [\s!effect]
\defineproperty [\v!stretch] [\s!effect] [\c!stretch=1]
%D Overprint cum suis.
\definepropertyhandler \v!overprint {\dostartoverprint}
\definepropertyhandler \v!knockout {\dostopoverprint }
\def\startoverprintproperty
{\ifincolor
\propertyhandler\currentproperty
\dooverprintmark\currentproperty
\fi}
\def\stopoverprintproperty
{\ifincolor
\ifcase\currentpropertylevel\or
\dostopoverprint
\dooverprintmark\empty
\else
\propertyhandler\previousproperty
\dooverprintmark\previousproperty
\fi
\fi}
\rawnewmark\overprintmark
\def\dooverprintmark#1%
{\ifinpagebody \else \ifinframed \else
\expanded{\rawsetmark\noexpand\overprintmark{#1}}%
\fi \fi}
\def\pushoverprintproperty
{\doifsomething{\rawgetbotmark\overprintmark}\dostopoverprint}
\def\popoverprintproperty
{\doifsomething{\rawgetbotmark\overprintmark}%
{\propertyhandler{\rawgetbotmark\overprintmark}}}
\def\popsplitoverprintproperty
{\getsplitmarks\overprintmark % hier wel
\doifsomething{\rawgetsplitbotmark\overprintmark}%
{\propertyhandler{\rawgetsplitbotmark\overprintmark}}}
\appendtoks \pushoverprintproperty \to \everypushproperties
\appendtoks \popoverprintproperty \to \everypopproperties
\appendtoks \popsplitoverprintproperty \to \everypopsplitproperties
%D Negative cum suis.
\definepropertyhandler \v!negative {\dostartnegative}
\definepropertyhandler \v!positive {\dostopnegative }
\def\startnegativeproperty
{\ifincolor
\propertyhandler\currentproperty
\donegativemark\currentproperty
\fi}
\def\stopnegativeproperty
{\ifincolor
\ifcase\currentpropertylevel\or
\dostopnegative
\donegativemark\empty
\else
\propertyhandler\previousproperty
\donegativemark\previousproperty
\fi
\fi}
\rawnewmark\negativemark
\def\donegativemark#1%
{\ifinpagebody \else \ifinframed \else
\expanded{\rawsetmark\noexpand\negativemark{#1}}%
\fi \fi}
\def\pushnegativeproperty
{\doifsomething{\rawgetbotmark\negativemark}\dostopnegative}
\def\popnegativeproperty
{\doifsomething{\rawgetbotmark\overprintmark}%
{\propertyhandler{\rawgetbotmark\negativemark}}}
\def\popsplitnegativeproperty
{\getsplitmarks\negativemark % hier wel
\doifsomething{\rawgetsplitbotmark\negativemark}%
{\propertyhandler{\rawgetsplitbotmark\negativemark}}}
\appendtoks \pushnegativeproperty \to \everypushproperties
\appendtoks \popnegativeproperty \to \everypopproperties
\appendtoks \popsplitnegativeproperty \to \everypopsplitproperties
%D Effects.
\definepropertyhandler \v!normal {0}
\definepropertyhandler \v!inner {0}
\definepropertyhandler \v!outer {1}
\definepropertyhandler \v!both {2}
\definepropertyhandler \v!hidden {3}
\definepropertyhandler \v!stretch{0}
\def\effectpropertydata#1%
{{\propertyhandler{#1}}%
{\propertyparameter{#1}\c!rulethickness}%
{\propertyparameter{#1}\c!stretch}}
\def\starteffectproperty
{\expanded{\dostartfonteffect\effectpropertydata\currentproperty}%
\doeffectmark{\effectpropertydata\currentproperty}}
\def\stopeffectproperty
{\dostopfonteffect
\ifcase\currentpropertylevel\or
\doeffectmark\empty
\else
\expanded{\dostartfonteffect\effectpropertydata\previousproperty}%
\doeffectmark{\effectpropertydata\previousproperty}%
\fi}
\rawnewmark\effectmark
\def\doeffectmark#1%
{\ifinpagebody \else \ifinframed \else
\expanded{\rawsetmark\noexpand\effectmark{#1}}% could be number
\fi \fi}
\def\pusheffectproperty
{\doifsomething{\rawgetbotmark\effectmark}\dostopfonteffect}
\def\popeffectproperty
{\doifsomething{\rawgetbotmark\effectmark}%
{\expanded{\dostartfonteffect\rawgetbotmark\effectmark}}}
\def\popspliteffectproperty
{\getsplitmarks\effectmark
\doifsomething{\rawgetsplitbotmark\effectmark}%
{\expanded{\dostartfonteffect\rawgetsplitbotmark\effectmark}}}
\appendtoks \pusheffectproperty \to \everypushproperties
\appendtoks \popeffectproperty \to \everypopproperties
\appendtoks \popspliteffectproperty \to \everypopsplitproperties
\protect \endinput
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