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%D \module
%D [ file=scrn-pag,
%D version=1998.01.15,
%D title=\CONTEXT\ Screen Macros,
%D subtitle=Pages, % moved code
%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.
% pagecomments will be done differently
\writestatus{loading}{ConTeXt Screen Macros / Pages}
\registerctxluafile{scrn-pag}{autosuffix}
\unprotect
\installcorenamespace{interactionscreen}
\installparameterhandler \??interactionscreen {interactionscreen}
\installsetuphandler \??interactionscreen {interactionscreen}
\newdimen\canvaswidth
\newdimen\canvasheight
\newdimen\canvasbackoffset
\newdimen\canvastopoffset
\newdimen\canvasmaxwidth
\newdimen\canvasmaxheight
\newdimen\canvascropoffset
\newdimen\canvastrimoffset
\newdimen\canvasbleedoffset
\newdimen\canvasartoffset
\mutable\lettonothing\currentinteractionscreendelay
\mutable\lettonothing\currentinteractionscreenheight
\mutable\lettonothing\currentinteractionscreenwidth
\newconditional\c_scrn_canvas_tight_page
\def\scrn_canvas_calculate
{\begingroup
\edef\currentinteractionscreenwidth {\interactionscreenparameter\c!width }%
\edef\currentinteractionscreenheight{\interactionscreenparameter\c!height}%
\canvasbackoffset\backspace
\canvastopoffset\topspace
\donetrue
\ifx\currentinteractionscreenwidth\v!max
\global\canvaswidth\printpaperwidth
\orelse\ifx\currentinteractionscreenwidth\v!fit
\donefalse
\global\canvaswidth\dimexpr
\leftcombitotal
+ \makeupwidth
+ \rightcombitotal
+ 2\dimexpr
\interactionscreenparameter\c!backspace
+ \interactionscreenparameter\c!horoffset
\relax
\relax
\orelse\ifx\currentinteractionscreenwidth\v!tight
\donefalse
\ifdim\backspace>\canvaswidth
\ifdim\backspace>\zeropoint\relax
\global\advance\canvasbackoffset -\canvaswidth
\fi
\fi
\global\advance\canvaswidth\dimexpr
\makeupwidth
+ \rightcombitotal
+ 2\dimexpr
\interactionscreenparameter\c!backspace
+ \interactionscreenparameter\c!horoffset
\relax
\relax
\else
\donefalse
\global\canvaswidth\currentinteractionscreenwidth
\fi
\ifx\currentinteractionscreenheight\v!max
\global\canvasheight\printpaperheight
\orelse\ifx\currentinteractionscreenheight\v!fit
\donefalse
\global\canvasheight\dimexpr
\topheight
+ \topdistance
+ \makeupheight
+ \bottomdistance
+ \bottomheight
+ 2\dimexpr
\interactionscreenparameter\c!topspace
+ \interactionscreenparameter\c!veroffset
\relax
\relax
\orelse\ifx\currentinteractionscreenheight\v!tight
\donefalse
\global\canvasheight\dimexpr\topheight+\topdistance\relax
\ifdim\topspace>\canvasheight
\ifdim\topspace>\zeropoint\relax
\global\advance\canvastopoffset -\canvasheight
\fi
\fi
\global\advance\canvasheight\dimexpr
\makeupheight
+ \bottomdistance
+ \bottomheight
+ 2\dimexpr
\interactionscreenparameter\c!topspace
+ \interactionscreenparameter\c!veroffset
\relax
\relax
\else
\donefalse
\global\canvasheight\currentinteractionscreenheight
\fi
\ifconditional\c_page_layouts_location_is_set
\global\setfalse\c_scrn_canvas_tight_page
\fi
\ifconditional\c_scrn_canvas_tight_page
\global\canvasmaxwidth \paperwidth
\global\canvasmaxheight\paperheight
\else
\global\canvasmaxwidth \printpaperwidth
\global\canvasmaxheight\printpaperheight
\fi
% new:
\ifdone
\global\canvascropoffset \layoutcropoffset
\global\canvastrimoffset \layouttrimoffset
\global\canvasbleedoffset\layoutbleedoffset
\global\canvasartoffset \layoutartoffset
\else
\global\canvascropoffset \zeropoint
\global\canvastrimoffset \zeropoint
\global\canvasbleedoffset\zeropoint
\global\canvasartoffset \zeropoint
\fi
\endgroup}
\newdimen\layoutcropoffset
\newdimen\layouttrimoffset
\newdimen\layoutbleedoffset
\newdimen\layoutartoffset
\appendtoks
\edef\p_cropoffset{\layoutparameter\c!cropoffset}%
\ifx\p_cropoffset\v!auto
\ifconditional\c_page_layouts_location_is_middle
\scratchheight\dimexpr(\printpaperheight-\paperheight)/2\relax
\scratchwidth \dimexpr(\printpaperwidth -\paperwidth )/2\relax
\layoutcropoffset\ifdim\scratchheight>\scratchwidth\scratchheight\else\scratchwidth\fi
\layouttrimoffset \layoutparameter\c!trimoffset
\layoutbleedoffset\layoutparameter\c!bleedoffset
\layoutartoffset \layoutparameter\c!artoffset
\else
\writestatus\m!system{auto crop etc only supported when location=middle}%
\layoutcropoffset \zeropoint
\layouttrimoffset \zeropoint
\layoutbleedoffset\zeropoint
\layoutartoffset \zeropoint
\fi
\else
\layoutcropoffset \layoutparameter\c!cropoffset
\layouttrimoffset \layoutparameter\c!trimoffset
\layoutbleedoffset\layoutparameter\c!bleedoffset
\layoutartoffset \layoutparameter\c!artoffset
\fi
\relax
\to \everysetuplayout
\setuplayout
[\c!cropoffset=\zeropoint,
\c!trimoffset=\zeropoint,
\c!bleedoffset=\zeropoint,
\c!artoffset=\zeropoint]
% test the next when something is changed here:
%
% \setuppapersize[A5][A3] \showframe
%
% % \setuplayout[location=middle] \setupinteractionscreen[option=fit]
% % \setuplayout[location=middle] \setupinteractionscreen[option=auto]
% % \setupinteractionscreen[option=fit]
% % \setupinteractionscreen[option=auto]
%
% \starttext \input ward \stoptext
\let\scrn_canvas_synchronize_simple \relax
\let\scrn_canvas_synchronize_complex\relax
\appendtoks
\glet\scrn_canvas_synchronize_simple \scrn_canvas_synchronize_simple_indeed
\glet\scrn_canvas_synchronize_complex\scrn_canvas_synchronize_complex_indeed
\to \everysetuplayout
\appendtoks
\glet\scrn_canvas_synchronize_simple \scrn_canvas_synchronize_simple_indeed
\glet\scrn_canvas_synchronize_complex\scrn_canvas_synchronize_complex_indeed
\to \everysetuplayouttarget
\def\scrn_canvas_synchronize_common {
mode {\interactionscreenparameter\c!option}%
singlesided \ifsinglesided true\else false\fi\space
doublesided \ifdoublesided true\else false\fi\space
copies \numexpr\interactionscreenparameter\c!copies\relax
print {\interactionscreenparameter\c!print}%
}
\appendtoks
\lettonothing\scrn_canvas_synchronize_common
\to \everyaftershipout
\def\scrn_canvas_synchronize_only
{\clf_setupcanvas
paperwidth \printpaperwidth
paperheight \printpaperheight
\scrn_canvas_synchronize_common
\relax}
\def\scrn_canvas_synchronize_set#width#height%
{\clf_setupcanvas
paperwidth \dimexpr#width\relax
paperheight \dimexpr#height\relax
\relax}
\let\scrn_canvas_synchronize_reset\scrn_canvas_synchronize_only
\def\scrn_canvas_synchronize_simple_indeed
{\scrn_canvas_synchronize_only
%\glet\scrn_canvas_synchronize_simple \relax
\glet\scrn_canvas_synchronize_complex\relax}
\def\scrn_canvas_synchronize_complex_indeed
{\scrn_canvas_calculate % otherwise we need to hook it into setuppage etc
\clf_setupcanvas
leftoffset \canvasbackoffset
topoffset \canvastopoffset
width \canvaswidth
height \canvasheight
paperwidth \canvasmaxwidth
paperheight \canvasmaxheight
cropoffset \canvascropoffset
trimoffset \canvastrimoffset
bleedoffset \canvasbleedoffset
artoffset \canvasartoffset
\scrn_canvas_synchronize_common
\relax
%\glet\scrn_canvas_synchronize_simple \relax
% one shot only
\glet\scrn_canvas_synchronize_complex\relax}
\appendtoks
\begingroup
\edef\p_option{\interactionscreenparameter\c!option}%
\ifx\p_option\v!max
\global\settrue \c_scrn_canvas_tight_page
\orelse\ifx\p_option\v!fit
\global\settrue \c_scrn_canvas_tight_page
\else
\global\setfalse\c_scrn_canvas_tight_page
\fi
\endgroup
\to \everysetupinteractionscreen
\setupinteractionscreen
[\c!width=\printpaperwidth,
\c!height=\printpaperheight,
\c!horoffset=\zeropoint,
\c!veroffset=\zeropoint,
\c!backspace=\backspace,
\c!topspace=\topspace,
\c!copies=\plusone, % not the best place but backend anyway
\c!option=\v!auto]
\appendtoks
\glet\scrn_canvas_synchronize_simple \scrn_canvas_synchronize_simple_indeed
\glet\scrn_canvas_synchronize_complex\scrn_canvas_synchronize_complex_indeed
\to \everysetupinteractionscreen
%D Conditional page breaks:
\permanent\tolerant\protected\def\screen[#list]%
{\iflocation
\page[#list]%
\fi}
%D Page transitions:
\lettonothing\scrn_transitions_list
\permanent\tolerant\protected\def\setuppagetransitions[#list]%
{\edef\scrn_transitions_list{#list}%
\ifx\scrn_transitions_list\v!reset
\lettonothing\scrn_transitions_list
\fi}
\def\scrn_transitions_set
{\iflocation \ifempty\scrn_transitions_list \else
\scrn_transitions_set_indeed
\fi \fi}
\def\scrn_transitions_set_indeed
{\begingroup
\edef\currentinteractionscreendelay{\interactionscreenparameter\c!delay}%
\clf_setpagetransition
n {\scrn_transitions_list}%
delay \ifx\currentinteractionscreendelay\v!none \zerocount\else\currentinteractionscreendelay\fi
\relax
\endgroup}
\prependtoks
\scrn_transitions_set
\to \everyshipout
\setupinteractionscreen
[\c!delay=\v!none]
\setuppagetransitions
[\v!reset]
\protect \endinput
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