% language=us

% this a rather old style and made for mkii, currently the only adaption to mkiv is
% with respect to fonts

\showgrid

\startenvironment details-environment

\usemodule[abr-02,simulate] % visual

\setupsystem
  [random=123]

\setupinteraction
  [state=start,
   style=,
   color=]

\setuplist
  [chapter]
  [interaction=all]

\setupalign
  [verytolerant,
   stretch,
   hanging]

\setuptolerance
  [verytolerant,
   stretch]

\definefontfeature
  [fullprotrusion]
  [protrusion=pure]

\definefontfeature[default][default,fullprotrusion]

\setupbodyfont[modernvariable,12pt]

\setuppagenumbering
  [alternative=doublesided]

\setupindenting
  [medium]

\setuptyping
  [margin=standard]

\setuptyping
  [color=blue]

\setuptype
  [color=blue]

\startmode [screen]
    \definepapersize[A4-S][width=210mm,height=210mm]
    \setuppapersize[A4-S][A4-S]
\stopmode

\setuplayout
  [header=3cm,
   footer=0pt,
   topspace=0cm,
   bottomspace=2cm,
   bottom=2cm,
   bottomdistance=0pt,
   height=middle,
   margindistance=.5cm,
   leftmargin=2.0cm,
   rightmargin=2.5cm,
   backspace=2.5cm,
   cutspace=3cm,
   width=middle,
   lines=48, % otherwise background issue
%    textdistance=\dimexpr-\topskip+\strutheight+.5cm\relax,
   grid=yes]

\setuplayout
  [margindistance=.5cm,
   edgedistance=.25cm,
   rightmargin=1cm,
   rightedge=.75cm,
   leftmargin=1cm,
   leftedge=.5cm]

\setuppagenumbering
  [location=]

\definecolor[red]      [r=.5]
\definecolor[blue]     [b=.5]
\definecolor[green]    [g=.5]
\definecolor[yellow]   [r=.5,g=.5]
\definecolor[gray]     [s=.5]

\definecolor[tred]     [r=.5,t=.5,a=1]
\definecolor[tblue]    [b=.5,t=.5,a=1]
\definecolor[tgreen]   [g=.5,t=.5,a=1]
\definecolor[tyellow]  [r=.5,g=.5,t=.5,a=1]
\definecolor[twhite]   [s=0,t=.5,a=1]

\definecolor[infogray] [g=.5,t=.5,a=1]
\definecolor[infogray] [s=.7,t=.5,a=1]
\definecolor[pagegray] [y=.5,t=.5,a=1]
\definecolor[textgray] [s=.9,t=.5,a=1]
\definecolor[areafill] [g=.5,t=.125,a=1]
\definecolor[areafill] [b=.5,t=.125,a=1]

\definecolor[fakerulecolor]     [green]
\definecolor[fakeparindentcolor][blue]

\definefont[BigNumber][RegularBold sa 4] % 5
\definefont[BigText]  [RegularBold sa 2]
\definefont[MedNumber][RegularBold sa 2]

\startbuffer[regular:sizes]
\definefont[regular:1][Regular*default sa 1]
\definefont[regular:2][Regular*default sa 2]
\definefont[regular:3][Regular*default sa 3]
\definefont[regular:4][Regular*default sa 4]
\stopbuffer

\getbuffer[regular:sizes]

\useMPlibrary[dum]

\definecolor[p-red]      [r=1]
\definecolor[p-blue]     [b=1]
\definecolor[p-yellow]   [r=1,g=1]

\definepalet
  [placeholder]
  [1=p-red,2=p-blue,3=p-yellow]

\definelayer
  [graphics]
  [position=yes]

\setupbackgrounds
  [page]
  [background={color,graphics},
   backgroundoffset=1cm,
   backgroundcolor=pagegray]

\definelayer
  [extras]
  [width=\paperwidth,height=\paperheight]

\setupbackgrounds
  [leftpage]
  [background=extras]

\setupbackgrounds
  [rightpage]
  [background=extras]

\definelayer % we need to compensate the backgroundoffset
  [text]
  [hoffset=1cm,
   voffset=1cm]

\setupbackgrounds
  [text]
  [background={color,text},
   backgroundoffset=1cm,
   backgroundcolor=textgray]

% chapter head

\setuphead
  [chapter]
  [placehead=empty,
   header=chapter,
   incrementnumber=details,
   style=\BigText,
   numberstyle=\BigNumber]

% we need to check each file
%
% \setuphead
%   [chapter]
%   [beforesection=\page,
%    aftersection=\page]

\definetext
  [chapter]
  [header]
  [\setups{chapter}]
  []

\definelayer
  [chapter]
  [width=\dimexpr\makeupwidth+\cutspace\relax,
   height=\headerheight]

\startsetups chapter
    \setups[chapter:title]
    \setups[chapter:number]
    \setups[chapter:finish]
\stopsetups

% here we can use mp instead but the following is not that bad either

\startsetups chapter:title

  \setlayerframed
    [chapter]
    [x=\dimexpr\makeupwidth+\cutspace\relax,
     location=lb]
    [height=\headerheight,
     foregroundcolor=white,
     background=color,
     backgroundcolor=blue,
     frame=off,
     offset=none,
     align={right,lohi}]
    {\hbox spread .5\cutspace
       {\hss
        \doiftextelse{\placeheadtext[chapter]}%
          {\placeheadtext[chapter]}%
          {\placeheadtext[title]}%
        \hss}\space
     \vskip.5cm}

\stopsetups

\startsetups chapter:number

  \setlayerframed
    [chapter]
    [x=\dimexpr\makeupwidth+\cutspace\relax,
     y=\vsize,
     location=lb]
    [width=\dimexpr\cutspace-\rightmargindistance\relax,
     height=\dimexpr\cutspace-\rightmargindistance\relax,
     foregroundcolor=white,
     background=color,
     backgroundcolor=red,
     frame=off,
     offset=none,
     align={middle,lohi}]
    {\hbox to \hsize
       {\hskip.5cm\hss
        \doifmode{*bodypart}{\placeheadnumber[chapter]}%
        \hss}}

\stopsetups

\startsetups chapter:finish

  \framed
    [width=\makeupwidth,
     height=\headerheight,
     background=chapter,
     frame=off]
    {}

\stopsetups

% page number

\defineframedtext
  [pagenumbertext]
  [align={lohi,middle},
   width=\dimexpr\cutspace-\margindistance\relax, % \hsize,
   height=\vsize,
   background=color,
   backgroundcolor=green,
   style=\MedNumber,
   color=white,
   offset=none,
   frame=off]

\setupbottomtexts
  [margin]
  []
  [\pagenumbertext{\hbox to \hsize{\hskip.5cm\hss\placepagenumber\hss}}]
  [\pagenumbertext{\hbox to \hsize{\hss\placepagenumber\hss\hskip.5cm}}]
  []

% area

\setupbackgrounds [text] [leftedge]    [backgroundoffset=0pt,backgroundcolor=areafill]
\setupbackgrounds [text] [rightedge]   [backgroundoffset=0pt,backgroundcolor=areafill]
\setupbackgrounds [text] [leftmargin]  [backgroundoffset=0pt,backgroundcolor=areafill]
\setupbackgrounds [text] [rightmargin] [backgroundoffset=0pt,backgroundcolor=areafill]

% grids

\setuptextbackground
  [grid]
  [state=start]

% intros

% \definetextbackground
%   [intro]
%   [backgroundcolor=infogray, % green,
%    backgroundoffset=.25cm,
%    offset=.5cm,
%    frame=off,
%    color=white]

\setuplist
  [chapter]
  [before=,
   after=,
   alternative=c,
   aligntitle=yes]

\startsectionblockenvironment [backpart]

  \writebetweenlist[chapter]{\blank}

\stopsectionblockenvironment

\stopenvironment