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%D \module
%D [ file=node-rul,
%D version=2009.11.03, % 1995.10.10,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Bars,
%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.
% todo: ex and and em traveling with attribute
\writestatus{loading}{ConTeXt Core Macros / Bars}
%D The name of this file might change.
%D \macros
%D {underbar,underbars,
%D overbar,overbars,
%D overstrike,overstrikes,
%D setupbar}
%D
%D In the rare case that we need undelined words, for instance
%D because all font alternatives are already in use, one can
%D use \type{\underbar} and \type{\overstrike} and their plural
%D forms.
%D
%D \startbuffer
%D \underbars{drawing \underbar{bars} under words is a typewriter leftover}
%D \overstrikes{striking words makes them \overstrike{unreadable} but
%D sometimes even \overbar{top lines} come into view.}
%D \stopbuffer
%D
%D \typebuffer
%D
%D \startvoorbeeld
%D \startlines
%D \getbuffer
%D \stoplines
%D \stopvoorbeeld
%D
%D The next macros are derived from the \PLAIN\ \TEX\ one, but
%D also supports nesting. The \type{$} keeps us in horizontal
%D mode and at the same time applies grouping.
%D
%D \showsetup{underbar}
%D \showsetup{underbars}
%D \showsetup{overbar}
%D \showsetup{overbars}
%D \showsetup{overstrike}
%D \showsetup{overstrikes}
%D
%D \showsetup{setupunderbar}
%D todo: mkvi this file ... no redefine, just pass all parameters, too messy now
%D (due to grouping) so better hash settings at the lua end
\unprotect
%definesystemattribute[ruled]
%definesystemattribute[shifted]
\registerctxluafile{node-rul}{1.001}
\installcommandhandler \??on {bar} \??on
\newtoks\checkalldefinedbars
\let\setupbars\setupbar
\appendtoks
\ifsecondargument
\dodefinebarindeed\currentbar
\else
\the\checkalldefinedbars
\fi
\to \everysetupbar
\appendtoks
\ifcsname\??on:\currentbar:c\endcsname
\csname\??on:\currentbar:c\endcsname\zerocount
\else
\expandafter\newcount\csname\??on:\currentbar:c\endcsname
\fi
\normalexpanded{\checkalldefinedbars{\doredefinebar{\currentbar}\the\checkalldefinedbars}}%
\dodefinebarindeed\currentbar
\setuevalue\currentbar{\doruled{\currentbar}}%
\to \everydefinebar
\unexpanded\def\dodefinebarindeed#1%
{\begingroup
\edef\currentbar{#1}%
\doifsomethingelse{\barparameter\c!color}
{\donetrue\colored[\barparameter\c!color]}
{\donefalse}%
\normalexpanded
{\endgroup
\scratchcounter\ctxlua{nodes.rules.define {
method = \barparameter\c!method,
offset = \barparameter\c!offset,
continue = "\barparameter\c!continue",
dy = \barparameter\c!dy,
rulethickness = \barparameter\c!rulethickness,
unit = "\barparameter\c!unit",
order = "\barparameter\c!order",
max = \barparameter\c!max,
ma = \ifdone\the\attribute\colormodelattribute \else0\fi,
ca = \ifdone\the\attribute\colorattribute \else0\fi,
ta = \ifdone\the\attribute\transparencyattribute\else0\fi
}}}%
\setevalue{\??on#1:a}{\the\scratchcounter}}
\let\doredefinebar\dodefinebarindeed
\unexpanded\def\doruled#1%
{\groupedcommand{\dodoruled{#1}}\relax}
\def\dodoruled
{\ctxlua{nodes.rules.enable()}% will be moved to lua
\glet\dodoruled\dodoruledindeed
\dodoruled}
\def\dodoruledindeed#1% maybe reverse the 1000 (also maybe use more attributes instead of settings)
{\edef\currentbar{#1}%
\advance\csname\??on:#1:c\endcsname\plusone % local ?
\scratchcounter\csname\??on:#1:c\endcsname
\dosetbarattributes\c!foregroundstyle\c!foregroundcolor
\attribute\ruledattribute\numexpr
1000*\scratchcounter
+\csname\??on#1\ifcsname\??on#1:\number\scratchcounter\s!parent\endcsname:\number\scratchcounter\fi:a\endcsname
\relax}
% ungrouped
\unexpanded\def\startbar[#1]%
{\begingroup
\dodoruled{#1}}
\unexpanded\def\stopbar
{\endgroup}
\newcount\currentbarnesting % todo: same as colors
\unexpanded\def\pushbar[#1]%
{\global\advance\currentbarnesting\plusone
\expandafter\edef\csname\??on:s:\number\currentbarnesting\endcsname
{\attribute\ruledattribute\the\attribute\ruledattribute}% stack
\dodoruled{#1}}
\unexpanded\def\popbar
{\csname\??on:s:\number\currentbarnesting\endcsname
\global\advance\currentbarnesting\minusone}
\setupbars
[\c!method=0, % new: 0=center nested, 1=stack nested
\c!continue=\v!no,
\c!offset=0, % upwards, replaces: topoffset bottomoffset
\c!dy=0,
\c!max=3,
\c!style=,
\c!rulethickness=.1,
\c!order=\v!foreground,
\c!unit=ex, % so now we are relative
\c!color=] % replaces: rulecolor
% \definebar[touchbar] [\c!method=0,\c!dy=-0.4,\c!offset=-0.0]
% \definebar[touchbars] [touchbar] [\c!continue=\v!yes]
\definebar[\v!overstrike] [\c!method=0,\c!dy=0.4,\c!offset=0.5,\c!continue=\v!yes]
\definebar[\v!underbar] [\c!method=1,\c!dy=-0.4,\c!offset=-0.3,\c!continue=\v!yes]
\definebar[\v!overbar] [\c!method=1,\c!dy=0.4,\c!offset=1.8,\c!continue=\v!yes]
\definebar
[\v!understrike]
[\c!method=0,
\c!offset=1.375,
\c!rulethickness=2.5,
\c!continue=\v!yes,
\c!order=\v!background,
\c!color=lightgray]
\definebar[\v!overstrikes] [\v!overstrike] [\c!continue=\v!no]
\definebar[\v!underbars] [\v!underbar] [\c!continue=\v!no]
\definebar[\v!overbars] [\v!overbar] [\c!continue=\v!no]
\definebar[\v!understrikes][\v!understrike][\c!continue=\v!no]
% we want these always so ...
\expandafter\let\expandafter\overstrike \csname\v!overstrike \endcsname
\expandafter\let\expandafter\underbar \csname\v!underbar \endcsname
\expandafter\let\expandafter\overbar \csname\v!overbar \endcsname
\expandafter\let\expandafter\overstrikes\csname\v!overstrikes\endcsname
\expandafter\let\expandafter\underbars \csname\v!underbars \endcsname
\expandafter\let\expandafter\overbars \csname\v!overbars \endcsname
\unexpanded\def\setupunderbar[#1]% too incompatible for the moment
{}
%D This will move: (a bit duplicated)
\installcommandhandler \??ra {shift} \??ra
\newtoks\checkalldefinedshifts
\let\setupshifts\setupshift
\appendtoks
\ifsecondargument
\dodefineshiftindeed\currentshift
\else
\the\checkalldefinedshifts
\fi
\to \everysetupshift
\appendtoks
\ifcsname\??ra:\currentshift:c\endcsname
\csname\??ra:\currentshift:c\endcsname\zerocount
\else
\expandafter\newcount\csname\??ra:\currentshift:c\endcsname
\fi
\normalexpanded{\checkalldefinedshifts{\doredefineshift{\currentshift}\the\checkalldefinedshifts}}%
\dodefineshiftindeed{\currentshift}%
\setuevalue\currentshift{\doshifted{\currentshift}}%
\to \everydefineshift
\unexpanded\def\dodefineshiftindeed#1%
{\begingroup
\edef\currentshift{#1}%
\normalexpanded
{\endgroup
\scratchcounter\ctxlua{nodes.shifts.define {
method = \shiftparameter\c!method,
continue = "\shiftparameter\c!continue",
dy = \shiftparameter\c!dy,
unit = "\shiftparameter\c!unit",
}}}%
\setevalue{\??ra#1:a}{\the\scratchcounter}}
\let\doredefineshift\dodefineshiftindeed
% \unexpanded\def\doshifted#1%
% {\groupedcommand{\dodoshifted{#1}}\relax}
\def\dodoshifted
{\ctxlua{nodes.shifts.enable()}%
\glet\dodoshifted\dodoshiftedindeed
\dodoshifted}
\def\dostartisolation{\signalcharacter}
\def\dostopisolation {\signalcharacter}
\def\doisolator {\signalcharacter}
\def\doisolatedgroupedalign#1#2%
{\groupedcommand
{\begingroup\dostartisolation\begingroup#1}
{#2\endgroup\dostopisolation\endgroup}}
\def\dosetupisolatedalign#1%
{\doisolator
\setupalign[#1]\relax}
\def\dodoshiftedindeed#1%
{\def\currentshift{#1}%
\advance\csname\??ra:#1:c\endcsname\plusone
\scratchcounter\csname\??ra:#1:c\endcsname
\attribute\shiftedattribute\numexpr1000*\scratchcounter
+\csname\??ra#1\ifcsname\??ra#1:\number\scratchcounter\s!parent\endcsname:\number\scratchcounter\fi:a\endcsname
\dosetshiftattributes\c!style\c!color
\dosetupisolatedalign{\shiftparameter\c!align}}
\unexpanded\def\doshifted#1%
{\doisolatedgroupedalign{\dodoshifted{#1}}{}}
\unexpanded\def\startshift[#1]%
{\begingroup
\dodoshifted{#1}}
\unexpanded\def\stopshift
{\endgroup}
\setupshifts
[\c!method=0,
\c!continue=\v!no,
\c!dy=0,
\c!unit=ex,
\c!align=,
\c!style=,
\c!color=]
\def\v!shiftup {shiftup}
\def\v!shiftdown{shiftdown}
\defineshift [\v!shiftup] [\c!method=0,\c!dy=-1,\c!unit=ex,\c!continue=\v!yes,\c!style=\txx,\c!color=]
\defineshift [\v!shiftdown] [\c!method=1,\c!dy=.3,\c!unit=ex,\c!continue=\v!yes,\c!style=\txx,\c!color=]
% we want these always so ...
\expandafter\let\expandafter\shiftup \csname\v!shiftup \endcsname
\expandafter\let\expandafter\shiftdown \csname\v!shiftdown \endcsname
\protect \endinput
% obsolete:
\setupunderbar
[\c!alternative=a,
\c!rulethickness=\linewidth,
\c!bottomoffset=1.5pt,
\c!topoffset=2.5pt,
\c!rulecolor=]
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