%D \module
%D   [      file=t-tugboat
%D        version=$Id: t-tugboat.tex 91 2011-08-14 16:48:04Z karl $
%D          title=\CONTEXT\ Style File,
%D       subtitle=\TUGBOAT\ base style,
%D         author={Hans Hagen, Aditya Mahajan, \unknown},
%D           date=\currentdate,
%D      copyright=Public Domain]

%D This file is derived t-tugboat by Aditya Mahajan which in turn is derived
%D from older files. Here we use columnsets.

\usemodule[newcolumnsets]

%D We store the information about the article in variables.


\setvariables
  [tugboat]
  [type=article,
   %
   year=1900,
   volume=0,
   number=0,
   page=1001,
   %
   title=ConTeXt style for TUGboat,
   subtitle=,
   keywords=,
   author=T. Boat,
   address={Harbour Master KB \\ Harbour St. 1 \\ 8061GH Hasselt NL},
   email={tugboat@tug.org}]

%D \TUGBOAT\ uses slightly different interline space than the default. So we change
%D the interline space.

\definebodyfontenvironment    [8pt] [interlinespace=9.5pt, big=9pt,   small=7pt]
\definebodyfontenvironment    [9pt] [interlinespace=11pt,  big=10pt,  small=8pt]
\definebodyfontenvironment   [10pt] [interlinespace=12pt,  big=12pt,  small=9pt]
\definebodyfontenvironment   [12pt] [interlinespace=14pt,  big=14.4pt,small=10pt]
\definebodyfontenvironment [14.4pt] [interlinespace=18pt,  big=14.4pt,small=12pt]

%D We us e italic rather than slanted for emphasis.

\setupbodyfontenvironment
  [default]
  [em=italic]

%D \TUGBOAT\ uses Computer Modern fonts, and \CONTEXT\ uses Latin Modern by default.
%D So, we just specify the font size.

\setupbodyfont
  [10pt]

%D We break after these chars in urls, not before.

\sethyphenatedurlafter /
\sethyphenatedurlafter .
\sethyphenatedurlafter _

%D The original layout used in the \LATEX\ style for \TUGBOAT\ is a bit ambiguous.
%D It uses low|-|level \TEX\ syntax, rather than changing the layout in a human
%D understandable way (for example, by using the \mono{geometry} package. I have
%D tried to translate it to \CONTEXT\ as far as I understand.

\setuppapersize
  [letter]
  [letter]

\setuplayout
  [topspace=3.8pc,% was 3.5pc
   header=1pc,
   headerdistance=1.5pc,
   height=middle,
   footerdistance=2pc,
   footer=1pc,
   bottomspace=3pc,
   %
   backspace=6pc,
   width=middle,
   cutspace=6pc,
   %
   margin=4pc,
   margindistance=1pc]

\setupcolumnset
  [distance=1.5pc]

\setuppagenumbering
  [location=,
   alternative=doublesided]

%D In \TUGBOAT\ different articles are glued together to form the final journal, so
%D we do not want each article to occupy even number of pages.

\installpagebreakhandler {last} {}

%D We use automatic indentation control, that is: no indentation after titles and
%D skips.

\setupindenting
  [20pt,yes]

%D We do not want indentation after lists.

\setupenumerations [indentnext=no]
\setupdescriptions [indentnext=no]

%D And these. We typeset itemizations ragged right.

\setupitemgroup
  [itemize]
  [indentnext=no,
   align=right]

%D We align them at the paragraph indentation and pack them by default.

\setupitemgroup
  [itemize]
  [each]
  [margin=1pc,
   width=1em,
   distance=0pt]

\setupitemgroup
  [itemize]
  [1]
  [packed]

%D We follow the \TUGBOAT\ style for sections. I do not know if \type {align=right}
%D also disables hyphenation. Lets wait and see on this. Rest all is straight
%D forward. It took me a while to realize that in \LATEX\ \type {\@startsection} the
%D absolute value of before skip (fourth argument) is important and not the sign.

\setuphead
  [section,subsection,subsubsection,
   subject,subsubject,subsubsubject]
  [style=bold,
   align=right,
   before={\blank[8pt]},
   after={\blank[4pt]}]

%D We define a logical skip. This is equal to the \tex{topsep} in the normal style,
%D and most environments should have this skip.

\definevspacingamount[tugsmallamount] [3pt  plus 1pt minus 1pt][.5\lineheight]
\definevspacingamount[tugmediumamount][9pt  plus 3pt minus 3pt][.5\lineheight]
\definevspacingamount[tuglargeamount] [10pt plus 4pt minus 4pt][\lineheight]

\defineblank[tugblank] [tugsmallamount]
\defineblank[tugsmall] [tugsmallamount]
\defineblank[tugmedium][tugmediumamount]
\defineblank[tuglarge] [tuglargeamount]
\defineblank[tughalf]  [halfline]

\setupblank
  [tugblank]

\setupitemize
  [1]
  [before={\blank[tugblank]},
   after={\blank[tugblank]},
   inbetween={\blank[tugblank]}]

\setuplines
  [before={\blank[tugblank]},
   after={\blank[tugblank]},
   inbetween={\blank[tugblank]}]

%D \TUGBOAT\ uses a smaller font size for verbatim typesetting.

\setuptyping
  [option=none,
   before={\blank[tugblank]\switchtobodyfont[small]},
   after={\blank[tugblank]}]

%D Not entirely a la \TUGBOAT:

\unexpanded\def\MyFootNoteRule
  {\hrule width 5pc height .4pt depth 0pt\relax \kern \strutdepth}

\setupfootnotes
  [bodyfont=8pt,
   location=columns,
   rule=on,
   rulecommand=\MyFootNoteRule]

\setupnotations
  [location=joinedup,
   width=fit,
   headstyle=normal,
   distance=.5em]

%D We define a standard description and enumeration environment.

\definedescription
  [description]
  [location=hanging,
   width=broad,
   before={\blank[tugblank]},
   after={\blank[tugblank]}]

\defineenumeration
  [enumeration]
  [location=hanging,
   width=broad,
   before={\blank[tugblank]},
   after={\blank[tugblank]}]

%D The bib does not handle urls nicely. So we provide a stop gap solution.

\definereferenceformat
  [cite]
  [left={[},
   right={]}]

\defineitemgroup
  [bibliography]
  [levels=1]

\setupitemgroup
  [bibliography]
  [symbol=n,
   left={[},
   right={]},
   width=1.5em,
   stopper=,
   itemalign=flushright,
   inbetween={\blank[small]}]

%D Instead of color, we use weighted gray scales:

\setupcolors
  [conversion=always]

%D English it is.

\mainlanguage
  [en]

%D We define some logical skips

\defineblank [tugbefore]   [big]
\defineblank [tuginbetween][big]
\defineblank [tugafter]    [tugbefore]

%D Some real macros:

\unexpanded\def\StartAbstract
  {\dostartbuffer[abstract][StartAbstract][StopAbstract]}

\startsetups tugboat:abstract:setup

  \setuptolerance
    [horizontal, tolerant]

  \setupnarrower
    [before={\blank[tughalf]},
     after={\blank[tuglarge]},
     middle=4.875pc]

\stopsetups

%D Headers and footers are different for normal issues and proceedings.

\startsetups tugboat:banner:text:article

%   {\sl TUGboat},\space
%   Volume \getvariable{tugboat}{volume}\space
%   (\getvariable{tugboat}{year}),\space
%   No.\space\getvariable{tugboat}{number}

\stopsetups

\def\postissno{Proceedings of the \tubyear\ Annual Meeting}

\startsetups tugboat:banner:text:proceedings

  \setups[tugboat:banner:text:article]
  \thinspace\emdash\thinspace
  \postissno

\stopsetups

\startsetups tugboat:banner:setup:article

  \setupheadertexts
    [\setups{tugboat:banner:text:article}]
    [pagenumber]

% There are no footers in regular articles
%
%  \setupfootertexts
%    [][\getvariable{tugboat}{author}]
%    [\getvariable{tugboat}{title}][]

\stopsetups

\startsetups tugboat:banner:setup:proceedings

  \setupheadertexts
    [][\getvariable{tugboat}{title}]
    [\getvariable{tugboat}{author}][]

  \setupfootertexts
    [\setups{tugboat:banner:text:proceedings}]
    [pagenumber]

\stopsetups

%D Article is default so,

\setups[tugboat:banner:setup:article]

%D It all starts here:

\unexpanded\def\StartArticle{\directsetup{tugboat:\getvariable{tugboat}{type}:start}}
\unexpanded\def\StopArticle {\directsetup{tugboat:article:stop}}

\startsetups tugboat:introduction:article

    \start
        \enforced\protected\def\\{\unskip\space\&\space\ignorespaces}
        \hbox{\indent\getvariable{tugboat}{author}}
        \par
    \stop

\stopsetups

\startsetups tugboat:introduction:proceedings

    \blank[20pt]

    \start
        \switchtobodyfont[12pt]
        \enforced\protected\def\\{\unskip\space\&\space\ignorespaces}
        \getvariable{tugboat}{author}
        \par
    \stop

    \start
        \switchtobodyfont[9pt]
        \enforced\protected\def\\{\unskip,\space\ignorespaces}
        \getvariable{tugboat}{address}
        \par
        \start
            \tt
            \getvariable{tugboat}{email}
        \stop
        \par
    \stop

\stopsetups

\startsetups tugboat:columns:presets

    % balancing data (heights)

\stopsetups

\startsetups tugboat:article:start

  \starttext

    \setups{tugboat:columns:presets}

    \setups{tugboat:banner:setup:\getvariable{tugboat}{type}}

    \startcolumnset

    \setupheadertexts
        [\setups{tugboat:banner:text:article}]
        [pagenumber]

    \setuppagenumber
        [number=\getvariable{tugboat}{page}]

    \snaptogrid \vbox \bgroup
        \forgetall
        \hrule height .6pt
        \blank[halfline]
        \start
            \enforced\let\\\par
            \start
                \bf
                \getvariable{tugboat}{title}
            \stop
            \par
            \blank[halfline]
            \hskip20pt\getvariable{tugboat}{author}
        \stop

        \blank[line]

        \doiftext {\getbuffer[abstract]} {
            \enforced\let\\\endgraf
            \setups[tugboat:abstract:setup]
            \startsubject[title={Abstract}]
                \getbuffer[abstract]
            \stopsubject
        }
    \egroup

\stopsetups

\startsetups tugboat:proceedings:start

    \starttext

    \setups{tugboat:banner:setup:\getvariable{tugboat}{type}}

    \setupheader
        [state=empty]

    \setuppagenumber
        [number=\getvariable{tugboat}{page}]

    \snaptogrid \vbox \bgroup

        \forgetall

        \start
            \switchtobodyfont[14.4pt]
            \enforced\let\\\par
            \getvariable{tugboat}{title}
            \par
        \stop

        \setups{tugboat:introduction:\getvariable{tugboat}{type}}

        \blank[tugmedium]

        \enforced\let\\\par

        \setups[tugboat:abstract:setup]

        \midaligned{\bf Abstract}

        \startnarrower[middle]
            \getbuffer[abstract]
        \stopnarrower

    \egroup

    \startcolumnset

\stopsetups

\def\signaturewidth{13pc}

\startsetups tugboat:affiliation:article

    \blank[line]

    \snaptogrid \vbox \bgroup

        \forgetall

        \leftskip=\dimexpr\textwidth-\signaturewidth\relax

        \enforced\let\\\par

        \dontleavehmode\llap {
            $\diamond$\enspace
        }
        \getvariable{tugboat}{author}
        \par

        \getvariable{tugboat}{address}
        \par

        {\tt\getvariable{tugboat}{email}}

  \egroup

\stopsetups

\startsetups tugboat:affiliation:proceedings

    % nothing fancy at the end

\stopsetups

\startsetups tugboat:article:stop

    \setups{tugboat:affiliation:\getvariable{tugboat}{type}}

    \blank[line]

    \startpacked
        \placenote[endnotes]
    \stoppacked

    \stopcolumnset

    \page

    \stoptext

\stopsetups

%D Normal word spacing, really?

\setuptolerance
  [strict]

%D Use this in documents:

% \setuptolerance
%   [verytolerant,stretch]

%D Logos, abbreviations (load a local file if needed).

\usemodule[abr-03]

% \unexpanded\def\Dash {\unskip\thinspace\emdash\thinspace\ignorespaces}
% \unexpanded\def\slash{/\penalty\zerocount\hskip\zeropoint\relax} % |/|

%D Language stuff.

\hyphenation{Post-Script data-base data-bases}

\setuplanguage
  [lefthyphenmin=2,
   rightthyphenmin=3]

%D A hack to read tugboat.dates settings.

\newcount\issueseqno

\def\tubyear{1234}
\def\tubvol {5}
\def\tubnum {6}

\def\issyear    #1.{\def\tubyear{#1}}
\def\vol    #1, #2.{\def\tubvol {#1}%
                    \def\tubnum {#2}}

%D Good bye.

\continueifinputfile{s-tugboat-columns.mkiv}

\StartArticle

    \StartAbstract
        \input bryson
    \StopAbstract

    \dorecurse{30}{\input ward \par} \page

    \startitemize
        \startitem \input ward \stopitem
        \startitem \input ward \stopitem
    \stopitemize

\StopArticle