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-%D \module
-%D [ file=attr-div,
-%D version=2007.06.06,
-%D title=\CONTEXT\ Attribute Macros,
-%D subtitle=Diverse,
-%D author=Hans Hagen,
-%D date=\currentdate,
-%D copyright=PRAGMA-ADE]
-%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 Attribute Macros / Diverse}
-
-%D This code will mnve.
-
-\unprotect
-
-\registerctxluafile{attr-div}{1.001}
-
-% \definesystemattribute[ignore]
-%
-% \edef\startignorecontent{\dosetattribute{ignore}\plusone}
-% \edef\stopignorecontent {\doresetattribute{ignore}}
-
-% todo: no need for 'color' argument, we can set that once at startup; currently
-% a bit inconsistent
-
-% 1=off 2=gray 3=spot 4=rgb 5=cmyk 6=cmy % only 1/2/4/5 are supported
-%
-% We could combine this in one attribute but this is not faster and also
-% less flexible because sometimes we want to freeze the attribute bit.
-%
-% Watch out: real color support will be implemented later.
-
-\newcount\currentcolormodel
-
-\def\dosetcolormodel#1%
- {\currentcolormodel\ctxlua{tex.print(colors.setmodel('#1'))}%
- \attribute\colormodelattribute\currentcolormodel}
-
-\dosetcolormodel{all}
-
-\appendtoks
- \dosetcolormodel{all}% redundant?
-\to \everyjob
-
-\def\registerrgbcolor #1#2#3#4{\ctxlua{colors.register('#1','rgb' ,#2,#3,#4)}}
-\def\registercmykcolor#1#2#3#4#5{\ctxlua{colors.register('#1','cmyk',#2,#3,#4,#5)}}
-\def\registergraycolor #1#2{\ctxlua{colors.register('#1','gray',#2)}}
-
-% transparency
-
-\def\registertransparency#1#2#3%
- {\setevalue{(ts:#1)}{\attribute\transparencyattribute\ctxlua{tex.write(transparencies.register(#2,#3))} }}
-
-\def\sometransparencyswitch#1{\csname(ts:#1)\endcsname}
-
-\def\sometransparencyswitch
- {\ctxlua{transparencies.enable()}%
- \gdef\sometransparencyswitch##1{\csname(ts:##1)\endcsname}%
- \sometransparencyswitch}
-
-% \registertransparency {one} {1} {.5}
-% \registertransparency {two} {1} {.6}
-
-% overprint
-
-\def\registercolorintent#1#2%
- {\setevalue{(os:#1)}{\attribute\colorintentattribute\ctxlua{tex.write(colorintents.register('#2'))} }}
-
-\def\dotriggercolorintent
- {\ctxlua{colorintents.enable()}%
- \gdef\dotriggercolorintent##1{\csname(os:##1)\endcsname}%
- \dotriggercolorintent}
-
-\registercolorintent{knockout} {knockout}
-\registercolorintent{overprint}{overprint}
-
-\installattributestack\colorintentattribute
-
-\setevalue{(os:#\v!none}{\attribute\colorintentattribute\attributeunsetvalue} % does this work out ok?
-
-% negative
-
-\def\registernegative#1#2%
- {\setevalue{(ns:#1)}{\attribute\negativeattribute\ctxlua{tex.write(negatives.register('#2'))} }}
-
-\def\dotriggernegative
- {\ctxlua{negatives.enable()}%
- \gdef\dotriggernegative##1{\csname(ns:##1)\endcsname}%
- \dotriggernegative}
-
-\registernegative{positive}{positive}
-\registernegative{negative}{negative}
-
-% effect
-
-\def\registereffect#1#2#3% #2=stretch #3=rulethickness
- {\setxvalue{(es:#1:#2:\number\dimexpr#3\relax)}%
- {\attribute\effectattribute\ctxlua{tex.write(effects.register('#1',#2,\number\dimexpr#3\relax))} }}
-
-\def\dotriggereffect
- {\ctxlua{effects.enable()}%
- \gdef\dotriggereffect##1##2##3%
- {\ifcsname(es:##1:##2:\number\dimexpr##3\relax)\endcsname\else\registereffect{##1}{##2}{##3}\fi
- \csname(es:##1:##2:\number\dimexpr##3\relax)\endcsname}%
- \dotriggereffect}
-
-% \registereffect{normal}
-% \registereffect{inner}
-% \registereffect{outer}
-% \registereffect{both}
-% \registereffect{hidden}
-
-% viewerlayers (will probably change a bit)
-
-% needs to work over stopitemize grouping etc
-
-\def\registerviewerlayer#1#2% global !
- {\setxvalue{(vl:#1)}{\global\attribute\viewerlayerattribute\ctxlua{tex.write(viewerlayers.register('#2'))} }}
-
-\setevalue{(vl:)}{\global\attribute\viewerlayerattribute\attributeunsetvalue}
-
-\def\dotriggerviewerlayer
- {\ctxlua{viewerlayers.enable()}%
- \gdef\dotriggerviewerlayer##1{\csname(vl:##1)\endcsname}%
- \dotriggerviewerlayer}
-
-\protect \endinput
-
-% test case
-%
-% {\green \hbox to \hsize{\leaders\hrule \hfill a}\par}
-% {\red \hbox to \hsize{\leaders\hbox{x}\hfill a}\par}