%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%
% This is file 'skeyval-pokayoke1.tex', version 1.3, 2013/05/15.           %
%                                                                          %
% This package and accompanying files may be distributed and/or            %
% modified under the conditions of the LaTeX Project Public License,       %
% either version 1.3 of this license or any later version. The latest      %
% version of this license is in http://www.latex-project.org/lppl.txt      %
% and version 1.3 or later is part of all distributions of LaTeX           %
% version 2005/12/01 or later.                                             %
%                                                                          %
% The LPPL maintenance status of this software is 'author-maintained'.     %
%                                                                          %
% This software is provided 'as it is', without warranty of any kind,      %
% either expressed or implied, including, but not limited to, the          %
% implied warranties of merchantability and fitness for a particular       %
% purpose.                                                                 %
%                                                                          %
% The following files constitute the skeyval bundle and must be            %
% distributed as a whole:                                                  %
%                                                                          %
%  README, skeyval.sty, skeyval-core.tex, skeyval-for.tex,                 %
%  skeyval-view.sty, skeyval-ltxpatch.sty, skeyval-ltxcmds.tex,            %
%  skeyval-pstkey.sty, skeyval-pstkey.tex, skeyval-testclass.cls,          %
%  skeyval-testpkg.sty, skeyval-pokayoke1, skeyval-pokayoke2,              %
%  skeyval-view-pokayoke1.                                                 %
%                                                                          %
% Copyright (c) 2010-2013 Ahmed Musa (amusa22@gmail.com).                  %
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%

\makeatletter
\RequirePackage{skeyval-ltxpatch}

% With 'skeyval-ltxpatch' loaded, class options will not be zapped and
% expandable commands can be passed as options.

\documentclass[
  text style=\ttfamily,
  show author=true,
  insertwatermark,
  watermarktext={skeyval-test1\\[.25ex]Page~\thepage},
  watermarkcolor=brown!80!yellow
]{skeyval-testclass}

\skvifpackageloadedTF{xcolor}{}{\usepackage[dvipsname]{xcolor}}
\usepackage{lipsum}

% The command \cmdalign is just for illustrating how key values
% may be expanded at key setting time:
\def\cmdalign{justified}

\usepackage[
  author=Albert X\"avier Einstein,
  align=.expanded{\cmdalign},
  show author=true,
  unknown-option,
]{skeyval-testpkg}

%+++++++++++ Keys whose names are zapped internally ++++++++++++++%

\skvzcmdkeys[KV]{fam}[mp@]{provide value,give value}[some value]{}
\skvzboolkeys[KV]{fam}[mp@]{provide value,give value}[true]{}

%++++++++++++++++++++++ Parenthesized keys +++++++++++++++++++++++%

% Parenthesized keys are keys with names that have parentheses
% The following is a key of 3 arguments. The default values are
% \x, \y, and \numexpr\x*2 - since there are 3 arguments.
%
\skvpntkey[KV]{fam}{evaluate (?) as (?) using (?)}[{\x}{\y}{\numexpr\x*2}]{%
  \def\argone{#1}\def\argtwo{#2}\def\argthree{#3}%
  % '\detokenize{\pgfmath}' won't work here!
  \skvxifinTF{\relax\string\pgfmath}{\relax\detokenize{#3}}{%
    #3%
  }{%
    \edef#2{#3}%
  }%
}

% The above parenthesized key can be set as follows:
%
\def\cmda{2}
\skvsetkeys[KV]{fam}{%
  evaluate (\cmda) as (\cmdb) using (\pgfmathsetmacro\cmdb{\cmda*10})
}
%\show\argthree

\newcommand*\vgap{\endgraf\medskip}
\def\keycval{xx}

%% +++++++++++++++ Examples of using \directkeys command ++++++++++%

% Note: When the value of a handler contains equality sign (=) or
% comma (,), it should be enclosed in braces.

\directkeys*{
  .exec=\skvtestcnt\z@,
  .prefix = KV1,
  .family = fam1,
  .holder prefix = mp@,
  .add paths={KV2/fam2,KV3/fam3},
  .ignore paths={KV2/fam2,KV3/fam3},
  .restore paths={KV2/fam2,KV3/fam3},
  .save initial values of keys,
  .initialize keys after define=false,
  .new keys = {
    .ord/keya/{dfta,dftb}/
      %\def\skvhp{my@}
      \def\cmda##1{#1*##1*#2}\logsetting
    ,
    .arg/keya/{#1,#2},
    % See argument of keyb below:
    .cmd/keyb/{1cm,2cm}/
      \edef\boxht{\the\dimexpr#1*2\relax}
      \edef\boxwd{\the\dimexpr#2*2\relax},
    .choice/keyc/center/{right,left,center,justified},
    .bool/keyd/true,
    .cmd/keye/dfte/\def\cmde##1{##1#1},
    .cmd/keyf/dftf/\def\cmdf##1{##1#1},
    .ord/.need value{keyg}/dftg,
    .ord/.forbid value{keyh}/dfth,
  },
  .args={
    keyb={#1,#2}
  },
  .set={
    keya={val1,val2},keyb={2.5cm,5cm}
  },
  .get value={KV1}{fam1}{keya}\cmda,
  .ignore keys={
    keyd,keye
  },
  .set with defaults={
    keyd,keye,keyf,keyg
  },
  .restore keys = keye,
  .link={keye2/keye},
  % Choices for keye can be declared directly:
  .state pattern expanded={keye,keye2}/{
    center.do=\def\curralign##1{\hfil##1\hfil},
    right.do=\def\curralign##1{\hfill##1},
    left.do=\def\curralign##1{##1\hfill},
    justified.do=\let\curralign\@iden
  },
  .exec code={
    \def\leftval{left}\def\rightval{right}
    \def\rrightval{\rightval}
  },
  % key1 and key2 are undefined. They will be defined internally
  % with the default values of keyc and keyd:
  .prepend slots={
    key1/{keyc=.expanded{\rightval}},key2/{keyd=false}
  },
  .append slots={
    key1/{keye=right,keyf=valf}
  },
  % When key3 and key4 are set, use their expanded values to set keye:
  .elink={
    {key3,key4}/keye
  },
  .slot expand twice={
    key5/{keyf=#1,keyg=#1}
  },
  .set keys={
    key3=.expand once{\leftval},
    key5=.expand twice{\rrightval}
  },
  .prepend links={
    {key6,key7}/{keye,keyf},
    {key8,key9}/{keye,keyg}
  },
  .exec code=\skvsetkeys[KV1]{fam1}{key6=center},
  % Set keya and keyb on previously declared and the following paths.
  % Enter known keys in \mysuccesslist. Try 14 families; stop when
  % 12 families have been hit (ie, keys have been set in them
  % successfully):
  .exec code=\def\flukepaths{},
  .search also set keys={
    .paths={KX/famx,KV1/fam1,KV3/fam3,KV3/fam4,KV4/fam3,KV4/fam4},
    .ignore keys={keyc},
    .try=14,
    .min success=10,
    .max success=12,
    .success list=\mysuccesslist,
    .if any path fails={%
      \edef\flukepaths{\skvaddlist,\flukepaths\skvcurrentpath}
    },
    .if hits less than goal={\skvsetkeys[KV1]{fam1}{keyc=center}},
    .kv={keya={val1,val2},keyb={1cm,2cm},keyc}
  },
%  .exec code={\show\mysuccesslist},
  \directkeys*{
    .exec=\skvtestcnt\z@\def\mysuccesslist{},
    .paths={KUA/fam1,KUA/fam2,KUB/fam1,KUB/fam2},
    .define ordinary keys={
      {keya,keyb,keyc}/.na/
        \def\y##1{#1*##1}
        \typeout{***}\logsetting
        \skvsetkeys[KV1]{fam1}{keyc=center}
      ,
    }
  },
  % '.try set keys' works independent of previously declared paths:
  .try set keys={
    .paths={
      KUA/fam1,KUA/fam2,KUA/fam3,KUA/fam4,
      KUB/fam1,KUB/fam2,KUB/fam3,KUB/fam4,
      KUC/fam1,KUC/fam2,KUC/fam3,KUC/fam4
    },
    .try=8,
    .upper goal=4,
    .lower goal=2,
    .ignore keys={keyb,keyc},
    .success list=\mysuccesslist,
    .kv={keya=vala,keyb=valb,keyc=valc}
  },
%.exec code={\show\mysuccesslist},
}

\directkeys*{
  .exec=\skvtestcnt\z@\def\mysuccesslist{},
  .paths={KUA/fam1,KUB/fam2},
  .hp=mp@,
  .ignore keys={keyd},
  .define keys={
    .initialize keys after define=true,
    .save initial values of keys,
    .exec code/\skvtestcnt\z@,
    % keya has no default but has a complex callback:
    .ord/keya/.na/{
        \skvtestcnt\z@\def\mysuccesslistb{}
        \directkeys{
          .path={KVX/famx},
          .search also set keys={%
            .paths={KUA/fam1,KUA/fam2,KUB/fam1,KUB/fam2},
            .try=8,
            .upper goal=4,
            .lower goal=1,
            .success list=\mysuccesslistb,
            .kv={keyb=valb}
          },
%         .exec code=\show\mysuccesslistb,
        }
      }
    ,
    % No default:
    .ord/{keyb,keyc,keyd}/.na/\def\x##1{#1*##1}\logsetting,
    .exec code=\def\cmda#1{\if0#1\fi},
    % No callback:
    .choice/keye/center/{center,left,right},
    .choice/keye2/center/{
        center.do=\def\giv@c{#1},
        left.do=\def\giv@l{#1},
        right.do=\def\giv@r{#1}
      }/.na/\@@warning{Invalid value '\detokenize{#1}' for keye2},
  },
  .try set keys={%
    .paths={
      KUA/fam1,KUA/fam2,KUA/fam3,KUA/fam4,
      KUB/fam1,KUB/fam2,KUB/fam3,KUB/fam4
    },
    .try=1,
    .upper goal=1,
    .lower goal=1,
    .ignore keys={keyc,keyd},
    .success list=\mysuccesslist,
    .kv={keya=vala,keyc=valc,keyd=vald}
  },
%  .exec code={\show\mysuccesslist},
  % Defining new handlers that can't be overloaded.
  % '.resd handler' and '.resd handlers' are reserved handlers.
  % They can be used to define new handlers (see below).
  .new reserved handlers={
    {.resd handler,.resd handlers}=\dirkeysdefhandlers{00}{#1},
  },
  .resd handlers={
    .example handler1=\def\val{#1}, .example handler2=\edef\val{#1}
  },
%  .exec=\skvshowcs{dirkeys@handler@.example handler1},
}

\makeatother

\begin{document}

\title{The \texttt{\textcolor{blue}{skeyval}} Package\\[1ex]
  Version 1.1a\\[1ex]
  \textsf{Test document 1}}
\author{Ahmed Musa}
\maketitle

%%+++++++++++++++++++ Producing arbitrary texts +++++++++++++++++++++%%

\noindent
An author writing an article for publication in \textsc{TUGboat} is
encouraged to create it on a computer file and submit it on magnetic tape.
\par
\hfill{\small Barbara Beeton, 1981}
\par\bigskip

\begin{\mpfalign}
\skvxifstrcmpTF\mpfalign{justified}{\noindent}{}
\mpftextstyle
The printer should refuse to employ wandering men, foreigners who,
after having committed some grievous error, can easily disappear and
return to their own country.
\hfill{\small Hieronymus Hornschuch (1608)}\endgraf
\end{\mpfalign}

\begingroup
\par\bigskip
\noindent
If you want to find out anything from the theoretical physicists
about the methods they use, I advise you to stick closely to
one principle: don't listen to their words, fix your mind
on their deeds.
\ifmpfshowauthor
  \nobreak
  \quad\hskip\fill\finalhyphendemerits0\relax
  \textcolor{red}{\mpfauthor}
\fi
\endgroup


%%++++++++++++++++++++++ Shadow boxes ++++++++++++++++++++++++%%

\par\bigskip
\begin{center}
\hrule
\par\bigskip

\newshadowbox{test 1}
\newshadowbox[framecolor=magenta,shadecolor=cyan,shadowsize=8pt,
  align=left]{test 2}
\newshadowbox[shadow=false,boxwidth=1cm]{test 3}
\newshadowbox[framesize=2pt,framecolor=red,shadowcolor=green]{test 4}
\newshadowbox[put frame=false,shadow,shadowsize=9pt,shadecolor=yellow,
  shadowcolor=violet!50,align=right]{test 5}
\par\bigskip
\hrule
\end{center}


%%++++++++++++++++++++++++++ Citation ++++++++++++++++++++++++%%

\par\bigskip
\noindent
\newcitation[
    author=George Bernard Shaw (1856--1950),
    show author,
    leftmargin=0pt,
    rightmargin=0pt,
    put frame,
    framecolor=blue,
    shadecolor=yellow!25!green!14,
    frame thickness=1pt,
]{%
    A man of great common sense and good taste; meaning thereby
    a man without originality and/or moral courage.
}

\par\bigskip
\noindent
\newcitation[
    author=George Bernard Shaw (1856--1950),
    show author,
    leftmargin=0pt,
    rightmargin=0pt,
    put frame=false,
    framecolor=yellow!30!blue,
    shadecolor=yellow!25,
    frame thickness=5pt,
    width=.8\textwidth,
]{%
    A man of great common sense and good taste; meaning thereby
    a man without originality and/or moral courage.
}

\par\bigskip
\noindent
\newcitation[
    author=Mohammed Ali,
    show author,
    leftmargin=0pt,
    rightmargin=0pt,
    put frame,
    framecolor=red!70!green,
    shadecolor=magenta!5!red!4,
    frame thickness=10pt,
]{%
    I always say I was `the greatest'; I have never said I was the smartest.
    \vgap
    At home I am a nice, quiet guy, but I don't want the world to know.
    Humble people, I have found, don't get very far.
    \vgap
    To win, you must have the skill and the will. But the will must be
    stronger than the skill.
    \vgap
    I'm the best golfer; I just haven't played it yet.
}


%++++++++++++++++++ Collecting body of environment +++++++++++++++++++%

\bigskip
\begin{collectbody}[
  title=Example of collect body,
  title scale=.8,
  title text style=\ttfamily\color{red}
]
\lipsum[1]
\end{collectbody}

\end{document}


%%+++++++++++++++++++++ Assigning arguments to keys +++++++++++++++++%%

\skvsetdefaultprefix{myprefix}
\skvordkey{fam}{key1}[deafult1]{}
\skvcmdkey{fam}[mp@]{key2}[deafultx,defaulty]{%
  \def\cmd##1{#1+#2+##1}%
}
\skvassignargs{fam}[.expanded]{key2}{#1,#2}
\def\valuex{valuex}
\def\valuey{valuey}
\skvsetkeys[myprefix]{fam}{key1=value1,key2={\valuex,\valuey}}

%%+++++++++++++++++++++ Examples of \skvmakekeys +++++++++++++++++++%%

\skvmakekeys[
  .prefix=KVA,
  .families={fam1,fam2},
  .hp=thp@,
  .all new,
  .define in all families,
  .initialize=true
]{%
  .ord/{keya,keyb}/default-a,
  .cmd/{keyc,keyd}/.na/\def\y##1{#1**##1},
  .choice/keyf/center/{center.do=\def\x##1{#1*##1},left,right},
  .zbool/show center/true/\edef\cmd{\ifthp@showcenter Yes\else No\fi},
}
%\skvshowcs{KVA/fam2/keyf.@cbk}
%\skvshowcs{KVA/fam1/keyb.@defa}
\def\keybval{xx}
\skvsetkeys[KVA]{fam1}{keyb=.expand once{\keybval}}


%%+++++++++++++++++++++ Examples of \skvusekeys +++++++++++++++++++%%

\skvmakekeys[
  .prefix=KVA,
  .families={fam1,fam2},
  .hp=thp@,
  .all new
]{%
  .ord/keya/{default-a}/\def\y##1{##1*#1*##1},
  .ord/keyb/defa-b,
}

\def\keybval{xx}

\skvusekeys[
  .prefix=KVA,
  .families={fam1,fam2},
  .set in all families,
  .save unknown keys
]{%
  keya,
  keyb=.expand once{\keybval}
}

% Families fam3 and fam4 aren't defined. Hence, with 'save unknown keys'
% set to 'true' by default, keys keya and keyb are saved as rm keys with
% their default values.
\skvusekeys[
  .prefix=KVA,
  .families={fam3,fam4},
  .set in all families,
  .save unknown keys
]{%
  keya,keyb=.expand once{\keybval}
}
%\skvshowcs{KVA/fam3/.@rmkeys}
%\skvshowcs{KVA/fam4/.@rmkeys}


%%+++++++++++++++ Key values with unbalanced conditionals ++++++++++++%%

\skvcmdkey[SKVT]{fam}[mpf]{keya}[keya-defa]{\def\keyaval{#1}}
\skvsetkeys[SKVT]{fam}{keya=\fi}

%%+++++++++++++++++++++ Examples of \skvkeyslet +++++++++++++++++++%%

\skvsaveinitialvaluekeys[KV]{fam}{keya,keyb,keyc}
%\skvshowcs{KV/fam/.@needini}
\skvmakekeys[
  .prefix=KV,
  .family=fam,
  .hp=thp@,
  .all new,
  .initialize,
  .save initial values
]{%
  .ord/keya/defa-a/\def\keyay##1{##1*#1*##1},
  .cmd/{keyb,keyc}/defa-b/\def\keyby##1{##1*#1*##1},
  .cmd/keyd,
}
%\skvshowcs{KV/fam/.@inikv}
\skvignorekeys[KV]{fam}{keyb,keyc}
\skvkeyslet[KV]{fam}{keyA=keya,keyB=keyb,keyC=keyc}
\skvshowcs{KV/fam/.@needini}


%++++++++++++++++++ Evaluating boolean expressions +++++++++++++++++++%

\skvifexprTF{%
  not ( expr { \skvifdefTF\xa } and expr { \skvifemptyTF\xa } )
  or ( expr { \skvifdefTF\xb } or expr { \skvifxTF\xa\xb } )
}{%
  \def\x{T}%
}{%
  \def\x{F}%
}

%++++++++++++++++++++++++++++ \cicadaloop +++++++++++++++++++++++++++%

\makeatletter
\skvtestcnt\z@
\def\blist{{X};\fi;{Y};Z}
\def\stack{}
\let\romn\romannumeral
\cicadaloop{{a},\if,{b},c}\if01\fi{%
  \advance\skvtestcnt by\@ne
  \@tempcntb\z@\@tempswafalse
  \cicadaloop*[;]\blist\if@tempswa\fi{%
    \advance\@tempcntb by\@ne
    \typeout{Doing \romn\skvtestcnt, \romn\@tempcntb:
      \detokenize{#1, ##1}}%
    \edef\stack{%
      \unexpanded\expandafter{\stack}\noexpand\do
      {\romn\skvtestcnt,\romn\@tempcntb}{\unexpanded{#1;##1}}%
    }%
    \ifnum\@tempcntb>\tw@\@tempswatrue\fi
  }%
}
\makeatother

%++++++++++++++++++++++++ \ifcases ++++++++++++++++++++++++++++++%

\skvifcases b\then
  case{a}{\def\x{do a}}
  case{b}{\def\x{do b}}
  case{c}{\def\x{do c}}
 %   default{\def\x{no match}}
\fi

\skvifcasse{x}
  case{a}{\def\x{do a}}
  case{b}{\def\x{do b}}
  case{c}{\def\x{do c}}
\elsedo
  \def\x{no match}
\endif

\skvifcasse{x}
  case{a}{\def\x{do a}}
  case{b}{\def\x{do b}}
  case{c}{\def\x{do c}}
%\elsedo
% \def\x{no match}
\endif

%++++++++++++ Processing a key's value as a comma list +++++++++++%

\skvordkeys[KV]{fam}{key1,key2}[default]{%
  .arg{#1/#2}%
  \def\x##1{##1*#1*#2}%
}
\def\aval{val1a/val1b}
\def\bval{val2a/val2b,val2c/val2d}
\skvsetkeys[KV]{fam}{%
  key1=\aval,
  key2=.eprocess list{\bval}
}

\skvordkeys[KV]{fam}{key1}[default]{\def\x##1{##1*#1}}
\def\aval{val1a,val1b,val1c,val1d}
\def\bval{\aval}
\def\cval{\bval}
\skvsetkeys[KV]{fam}{%
  key1=.expand once process list{\aval},
  key1=.expand twice process list{\bval},
  key1=.expand process list{\cval}
}

% End of file skeyval-pokayoke1.tex