%D \module
%D   [       file=cont-new,
%D        version=1995.10.10,
%D          title=\CONTEXT\ Miscellaneous Macros,
%D       subtitle=New Macros,
%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.

\newcontextversion{2012.05.30 11:26}

%D This file is loaded at runtime, thereby providing an
%D excellent place for hacks, patches, extensions and new
%D features.

\unprotect

\writestatus\m!system{beware: some patches loaded from cont-new.mkiv}

\def\dividedsize#1#2#3% size gap n
  {\dimexpr
     \ifnum\dimexpr#1\relax>\plusone
       (\dimexpr#1\relax-\numexpr#3-1\relax\dimexpr#2\relax)/#3\else#1%
     \fi
   \relax}

\def\singlewidened     #1{\hbox spread 1em{\hss#1\hss}}
\def\complexwidened[#1]#2{\hbox spread  #1{\hss#2\hss}}

\definecomplexorsimple\widened

\let\active\activecatcode % for a while (tikz)

% todo
%
% \def\definelocation{\dodoubleargument\dodefinelocation}
% \def\dodefinelocation[#1][#2]{\setvalue{loc:#1}{#2}}
%
% \definelocation[lt]           [\v!left\v!top]
% \definelocation[tl]           [\v!left\v!top]
% \definelocation[\v!top\v!left][\v!left\v!top]
%
% \def\getlocation#1{\executeifdefined{loc:#1}{#1}}

% \let\cs\getvalue % no, we want \cs to be czech

% experimental so this may change

\def\startdescriptions
  {\dosingleempty\dostartdescriptions}

\def\dostartdescriptions[#1]%
  {\begingroup
   \def\item{\getvalue{#1}}%
   \let\dostoppairdescription \donothing
   \let\@@description         \dostartpairdescription
   \let\@@startsomedescription\dostartsomedescription}

\def\stopdescriptions
  {\dostoppairdescription
   \endgroup}

\def\dostartpairdescription[#1][#2]%
  {\dostoppairdescription
   \def\dostoppairdescription{\@@stopdescription{#1}}%
   \bgroup
   \def\currentdescription{#1}%
   \doifelse{\descriptionparameter{\s!do\c!state}}\v!start
     {\@@makedescription{#1}[#2]{}}
     {\@@makedescription{#1}[#2]}}

\def\dostartsomedescription% #1[#2]#3%
  {\bgroup
   \@@makedescription} % {#1}[#2]{#3}}

% \starttext
%
% \definedescription[test]
%
% \startdescriptions
% \test{Foo} Bar bar bar
% \test{Foo} Bar bar bar
% \test{Foo} Bar bar bar
% \stopdescriptions
%
% \startdescriptions[test]
% \item{Foo} Bar bar bar
% \item{Foo} Bar bar bar
% \item{Foo} Bar bar bar
% \stopdescriptions
%
% \startdescriptions
% \starttest{Foo} Bar bar bar \stoptest
% \starttest{Foo} Bar bar bar \stoptest
% \starttest{Foo} Bar bar bar \stoptest
% \stopdescriptions
%
% \startdescriptions[test]
% \item{Foo} Bar bar bar
% \item{Foo} Bar bar bar
% \item{Foo} Bar bar bar
% \stopdescriptions
%
% \stoptext

% this will be activated when
%
% \newinsert\thispageinsert % <- installinsertion
%
% \def\flushatthispage
%   {\bgroup
%    \dowithnextbox{\insert\thispageinsert{\box\nextbox}\egroup}%
%    \hbox}
%
% \appendtoks
%     \ifvoid\thispageinsert\else\hbox{\smashedbox\thispageinsert}\fi
% \to \everyshipout

% \definemarkedpage[nobackgrounds]
% \markpage[nobackgrounds]
% \doifmarkedpageelse{nobackgrounds}

% Just a simple and fast hanger, for usage in macros.

\def\setuphanging
  {\dodoubleempty\getparameters[\??ha]}

\setuphanging
  [\c!distance=.5em]

\def\starthanging
  {\noindent\bgroup
   \dowithnextbox
     {\setbox\nextbox\hbox{\flushnextbox\hskip\@@hadistance}%
      \hangindent\nextboxwd
      \hangafter\plusone
      \flushnextbox\ignorespaces}
   \hbox}

\def\stophanging
  {\endgraf
   \egroup}

% experimental

\def\stophangaround
  {\endgraf
   \egroup}

\def\starthangaround
  {\noindent\bgroup
   \dowithnextbox
     {\ifdim\nextboxht>\strutht\setbox\nextbox\tbox{\flushnextbox}\fi
      \setbox\nextbox\hbox{\flushnextbox\hskip\@@hadistance}%
      \getboxheight\scratchdimen\of\box\nextbox
      \getnoflines\scratchdimen
      \nextboxht\strutht
      \nextboxdp\strutdp
      \hangindent\nextboxwd
      \hangafter-\noflines
      \llap{\flushnextbox}\ignorespaces}
   \hbox}

\def\modevalue#1#2#3%
  {\@EA\ifx\csname\@mode@\systemmodeprefix#1\endcsname\endcsname\enabledmode#2\else#2\fi}

\def\systemmodevalue#1%
  {\modevalue{\systemmodeprefix#1}}

% new, still to be improved
%
% \dorecurse{10}
%   {\input thuan
%    \placefigure{}{\framed[height=1.5cm]{test}}
%    \placefloatplaceholder}

\def\placefloatplaceholder
  {\ifroomforfloat \else
     \scratchdimen\pagegoal
     \advance\scratchdimen-\pagetotal
     \advance\scratchdimen-3\lineheight
     \ifdim\scratchdimen>\zeropoint
       \startlinecorrection[blank]
       \mhbox{\inframed{\labeltexts{placeholder}{\lastcaptiontag}}}%
       \stoplinecorrection
     \else
       \allowbreak
     \fi
   \fi}

\setuplabeltext
  [placeholder={, moved}]

% move to support module, and then use context(...)

\startluacode
    function commands.percentageof(str,dim)
        local n = str:match("^(.*)%%$")
        context.sprint(tex.ctxcatcodes,(n and (tonumber(n)/100)*dim .. "sp") or str)
    end
\stopluacode

\gdef\setpercentdimen#1#2%
  {#1=\ctxcommand{percentageof("#2",\number#1)}\relax}

% \scratchdimen=100pt \setpercentdimen\scratchdimen{10\letterpercent} \the\scratchdimen
% \scratchdimen=100pt \setpercentdimen\scratchdimen{5pt}              \the\scratchdimen

\bgroup \permitcircumflexescape

\obeylines % don't remove %'s !

\gdef\collapsedspace#1%
  {\ifx#1^^M%
     \expandafter\collapsedspace
   \else
     \space
     \expandafter#1%
   \fi}

\gdef\collapsespaces
  {\prependtoksonce\relax\to\everyeof%
   \ignorelines%
   \ignoretabs%
   \let\obeyedspace\collapsedspace%
   \obeyspaces}

\egroup

\def\inlinedbox
  {\bgroup
   \dowithnextbox
     {\scratchdimen\nextboxht
      \advance\scratchdimen\nextboxdp
      \advance\scratchdimen-\lineheight
      \divide\scratchdimen\plustwo
      \advance\scratchdimen\strutdepth
      \setbox\nextbox\hbox{\lower\scratchdimen\flushnextbox}%
      \nextboxht\strutht
      \nextboxdp\strutdp
      \flushnextbox
      \egroup}%
     \hbox}

\def\dimenratio#1#2% etex only
  {\withoutpt\the\dimexpr2\dimexpr(#1)/\dimexpr(#2)/32768\relax\relax}

\def\doxprecurse#1#2%
  {\ifnum#1=\zerocount % no \ifcase
     \expandafter\gobblethreearguments
   \else
     #2\expandafter\expandafter\expandafter\doxprecurse\expandafter
   \fi\expandafter{\the\numexpr#1-1\relax}{#2}}

\def\buttonframed{\dodoubleempty\localframed[\??bt]} % goodie

\unexpanded\def\asciistr#1{\dontleavehmode{\defconvertedargument\ascii{#1}\verbatimfont\ascii}}

\def\shapefill{\vskip\zeropoint\!!plus\lineheight\!!minus\lineheight\relax}

% \ruledhbox
%   {\startignorespaces
%      \def\oeps{a}
%      \startignorespaces
%        \def\oeps{a}
%      \stopignorespaces
%      \def\oeps{a}
%    \stopignorespaces
%    \oeps}

\newsignal\boissignal
\newcount \boislevel

\long\def\startignorespaces
  {\advance\boislevel\plusone
   \ifcase\boislevel\or \ifhmode
     \hskip\boissignal
   \fi \fi
   \ignorespaces}

\long\def\stopignorespaces
  {\ifcase\boislevel\or \ifhmode
    \doloop
      {\ifdim\lastskip=\zeropoint
         \exitloop
       \else\ifdim\lastskip=\boissignal
         \unskip
         \exitloop
       \else
         \unskip
       \fi\fi}%
   \fi \fi
   \advance\boislevel\minusone}

\def\minimalhbox#1#%
  {\dowithnextbox
     {\bgroup
      \setbox\scratchbox\hbox#1{\hss}%
      \ifdim\nextboxwd<\wd\scratchbox\nextboxwd\wd\scratchbox\fi
      \flushnextbox
      \egroup}
     \hbox}

\def\gobbleuntilempty#1\empty{}

\def\dodimchoice#1#2#3%
  {\ifdim#1#2%
     #3\@EA\gobbleuntilempty
   \else
     \@EA\dodimchoice
   \fi{#1}}

\def\donumchoice#1#2#3%
  {\ifnum#1#2%
     #3\@EA\gobbleuntilempty
   \else
     \@EA\dodimchoice
   \fi{#1}}

\def\dimchoice#1#2{\dodimchoice{#1}#2{=#1}{#1}\empty}
\def\numchoice#1#2{\donumchoice{#1}#2{=#1}{#1}\empty}

% \the\dimexpr(\dimchoice {7pt}{{<10pt}{8pt}{<12pt}{9pt}{<15pt}{10pt}{=11pt}{12pt}})
% \the\dimexpr(\dimchoice{11pt}{{<10pt}{8pt}{<12pt}{9pt}{<15pt}{10pt}{=11pt}{12pt}})
% \the\dimexpr(\dimchoice{14pt}{{<10pt}{8pt}{<12pt}{9pt}{<15pt}{10pt}{=11pt}{12pt}})

\def\tabulaterule % to be redone, not correct
  {\dotabulaterule
     {\hrule\!!height.5\scratchdimen\!!depth.5\scratchdimen\relax
      \doifvalue{\??tt\currenttabulate\c!distance}\v!grid
        {\kern-\scratchdimen}}} % experimental tm-prikkels
% so far

% between alignment lines certain rules apply, and even a
% simple test can mess up a table, which is why we have a
% special test facility
%
% \ruledvbox
%   {\starttabulate[|l|p|]
%    \NC 1test \NC test \NC \NR
%    \tableifelse{\doifelse{a}{a}}{\NC Xtest \NC test \NC \NR}{}%
%    \stoptabulate}

\long\def\tableifelse#1%
  {\tablenoalign
     {#1%
       {\aftergroup \firstoftwoarguments}%
       {\aftergroup\secondoftwoarguments}}}

\long \def\tableiftextelse#1{\tableifelse{\doiftextelse{#1}}}

\def\tightvbox{\dowithnextbox{\nextboxdp\zeropoint\flushnextbox}\vbox}
\def\tightvtop{\dowithnextbox{\nextboxht\zeropoint\flushnextbox}\vtop}

% what is this stupid macro meant for:

\def\hyphenationpoint
  {\hskip\zeropoint}

\def\hyphenated#1%
  {\bgroup
   \!!counta\zerocount
   \def\hyphenated##1{\advance\!!counta\plusone}%
   \handletokens#1\with\hyphenated
   \!!countb\plusone
   \def\hyphenated##1%
     {##1%
      \advance\!!countb\plusone\relax
      \ifnum\!!countb>2 \ifnum\!!countb<\!!counta
        \hyphenationpoint
      \fi\fi}%
   \handletokens#1\with\hyphenated
   \egroup}

\def\obeysupersubletters
  {\let\super\normalsuper
   \let\suber\normalsuber
   \let\normalsuper\letterhat
   \let\normalsuber\letterunderscore
   \enablesupersub}

\def\obeysupersubmath
  {\let\normalsuper\letterhat
   \let\normalsuber\letterunderscore
   \enablesupersub}

\def\startgridcorrection
  {\dosingleempty\dostartgridcorrection}

\def\dostartgridcorrection[#1]%
  {\ifgridsnapping
     \snaptogrid[#1]\vbox\bgroup
   \else
     \startbaselinecorrection
   \fi}

\def\stopgridcorrection
  {\ifgridsnapping
     \egroup
   \else
     \stopbaselinecorrection
   \fi}

\def\checkgridsnapping
  {\lineskip\ifgridsnapping\zeropoint\else\normallineskip\fi}

\def\startplaatsen
  {\dosingleempty\dostartplaatsen}

\def\dostartplaatsen[#1]% tzt n*links etc
  {\endgraf
   \noindent\bgroup
   \setlocalhsize
   \hbox to \localhsize\bgroup
     \doifnot{#1}\v!left\hss
     \def\stopplaatsen
       {\unskip\unskip\unskip
        \doifnot{#1}\v!right\hss
        \egroup
        \egroup
        \endgraf}%
     \gobblespacetokens}

% \startplaatsen[links] bla \stopplaatsen

\def\startcolumnmakeup % don't change
  {\bgroup
   \getrawnoflines\textheight % teksthoogte kan topskip hebben, dus raw
   \scratchdimen\noflines\lineheight
   \advance\scratchdimen-\lineheight
   \advance\scratchdimen\topskip
   \setbox\scratchbox
   \ifcase\showgridstate\vbox\else\ruledvbox\fi to \scratchdimen\bgroup
   \forgetall} % ! don't change

\def\stopcolumnmakeup
  {\egroup
   \dp\scratchbox\zeropoint
   \wd\scratchbox\textwidth
   \box\scratchbox
   \egroup
   \page_otr_command_synchronize_hsize}

\long\def\startexternalfigure
  {\dotripleempty\dostartexternalfigure}

\long\def\dostartexternalfigure[#1][#2][#3]#4\stopexternalfigure
  {\gdef\figuredescription{#4}%
   \externalfigure[#1][#2][#3]%
   \globallet\figuredescription\empty}

\let\figuredescription\empty

% incomplete, will be a special case of float placement

\def\startfixed{\dosingleempty\dostartfixed}

\def\dostartfixed[#1]%
  {\expanded{\dowithnextbox{\noexpand\dodofixed{\ifhmode0\else1\fi}{#1}}}%
   \vbox\bgroup
   \setlocalhsize}

\def\stopfixed
  {\egroup}

\def\dodofixed#1#2%
  {\ifcase#1\relax
     \processaction
       [#2]
       [   \v!high=>\bbox   {\flushnextbox},
           \v!low=>\tbox    {\flushnextbox},
         \v!middle=>\vcenter{\flushnextbox},
           \v!lohi=>\vcenter{\flushnextbox},
        \s!unknown=>\tbox   {\flushnextbox},
        \s!default=>\tbox   {\flushnextbox}]%
   \else
     \startbaselinecorrection
       \noindent\flushnextbox
     \stopbaselinecorrection
   \fi}

% \startitemize
%
% \item \externalfigure[koe][height=2cm]
% \item \externalfigure[koe][height=2cm]
% \item \externalfigure[koe][height=2cm]
% \item \externalfigure[koe][height=2cm]
%
% \page
%
% \item \startfixed      \externalfigure[koe][height=2cm]\stopfixed
% \item \startfixed[high]\externalfigure[koe][height=2cm]\stopfixed
% \item \startfixed[low] \externalfigure[koe][height=2cm]\stopfixed
% \item \startfixed[lohi]\externalfigure[koe][height=2cm]\stopfixed
%
% \page
%
% \item test \startfixed      \externalfigure[koe][height=2cm]\stopfixed
% \item test \startfixed[high]\externalfigure[koe][height=2cm]\stopfixed
% \item test \startfixed[low] \externalfigure[koe][height=2cm]\stopfixed
% \item test \startfixed[lohi]\externalfigure[koe][height=2cm]\stopfixed
%
% \page
%
% \item test \par \startfixed      \externalfigure[koe][height=2cm]\stopfixed
% \item test \par \startfixed[high]\externalfigure[koe][height=2cm]\stopfixed
% \item test \par \startfixed[low] \externalfigure[koe][height=2cm]\stopfixed
% \item test \par \startfixed[lohi]\externalfigure[koe][height=2cm]\stopfixed
%
% \stopitemize

\def\obeyfollowingtoken{{}}  % end \cs scanning

% potential new defaults:
%
% \setbreakpoints[compound]

% till we fixed all styles:

\let\\=\crlf

\protect \endinput