\NeedsTeXFormat{LaTeX2e}[1995/12/01]
\ProvidesPackage{rtsched}[2005/01/01]
\typeout{'rtsched' style for Latex and PSTricks}
\typeout{Easily draw real-time schedules in TeX/Latex.}
\typeout{(c) 2005, Giuseppe Lipari, Pisa, Italy (g.lipari@sssup.it)}
\typeout{Version 1.0}

\RequirePackage{multido}
\RequirePackage{pstricks}
\RequirePackage{keyval}

%%
%% These can be changed at any time
%% 
\def\RTWindowLength{10cm}    % window length
\def\RTWindowHeight{0cm}     % window height
\def\RTNullWindowHeight{0cm} % nullwindow height
\def\RTTaskLabelSize{10pt}   % Size in pt of the task label
\def\RTNumberLabelSize{10pt} % Size in pt of the number labels
\def\RTDefTaskSymbol{\tau}
\def\RTDefNumberOffset{0}
\def\RTDefTaskFill{solid}
\def\RTDefTaskColor{gray}
\def\RTDefLineColor{black}
\def\RTDefXScale{1}
\def\RTDefWriteSymbols{0}
\def\RTDefGridInvisible{0}
\def\RTDefNumbersInvisible{0}
\def\RTDefRowLabelOffset{0pt}

\def\RTExecLabel{\ }
\def\RTTaskSymbol{\RTDefTaskSymbol}
\def\RTTaskFill{\RTDefTaskFill}
\def\RTTaskColor{\RTDefTaskColor}
\def\RTLineColor{\RTDefLineColor}
\def\RTXScale{\RTDefXScale}
\def\RTWriteSymbols{\RTDefWriteSymbols}
\def\RTNumberOffset{\RTDefNumberOffset}
\def\RTNumberOffset{\RTDefNumberOffset}
\def\RTGridInvisible{\RTDefGridInvisible}
\def\RTNumbersInvisible{\RTDefGridInvisible}
\def\RTRowLabelOffset{\RTDefRowLabelOffset}

\define@key{RT}{height}[\RTNullWindowHeight]{\def\RTWindowHeight{#1}}
\define@key{RT}{width}[10cm]{\def\RTWindowLength{#1}}
\define@key{RT}{labelsize}[10pt]{\def\RTTaskLabelSize{#1}}
\define@key{RT}{numbersize}[10pt]{\def\RTNumberLabelSize{#1}}
\define@key{RT}{color}[\RTDefTaskColor]{\def\RTTaskColor{#1}}
\define@key{RT}{linecolor}[\RTDefLineColor]{\def\RTLineColor{#1}}
\define@key{RT}{execlabel}[\ ]{\def\RTExecLabel{#1}}
\define@key{RT}{fillstyle}[\RTDefTaskFill]{\def\RTTaskFill{#1}}
\define@key{RT}{nocommand}{}
\define@key{RT}{xscale}[\RTDefXScale]{\def\RTXScale{#1}}
\define@key{RT}{symbol}[{\tau}]{\def\RTTaskSymbol{#1}}
\define@key{RT}{nosymbols}[\RTDefWriteSymbols]{\def\RTWriteSymbols{#1}}
\define@key{RT}{numoffset}[\RTDefNumberOffset]{\def\RTNumberOffset{#1}}
\define@key{RT}{nogrid}[\RTDefGridInvisible]{\def\RTGridInvisible{#1}}
\define@key{RT}{nonumbers}[\RTDefNumbersInvisible]{\def\RTNumbersInvisible{#1}}
\define@key{RT}{labeloffset}[\RTDefRowLabelOffset]{\def\RTRowLabelOffset{#1}}


%%
%% temporaries
\newdimen\sx % slot length
\newdimen\sy % slot height
\newdimen\hy % frame height
\newdimen\xx % x position
\newdimen\yy % y position
\newdimen\xxx % x position
\newdimen\yyy % y position
\newcount\nsx % number of horizontal slots
\newcount\nsy % number of vertical slots
\newcount\nhl % number of horizonatal lines
\newcount\nvl % number of vertical lines
\newcount\tmp % temp

\newcounter{myLabel}

\def\RTGrid{\@ifnextchar[\@mygrid@begin{\@mygrid@begin[]}}

\def\RTGridBegin{\@ifnextchar[\@mygrid@begin{\@mygrid@begin[]}}
\def\@mygrid@begin[#1]#2#3{\setkeys{RT}{#1}%
  %% number of horizontal steps in the grid
  \nsx = #3 \advance \nsx by 2 %
  %% real lenght of the window (approx)
  \nvl = \nsx \advance \nvl by 1 %
  %% compute lenght of a step
  \sx = \RTWindowLength \divide \sx by \nsx %
  %% number of vertical steps in the grid
  \nsy = #2 \multiply \nsy by 3 \advance \nsy by 1 %
  %% compute lenght of a vertical step (if height is null, \sy is the
  %% same as \sx)
  \ifx\RTWindowHeight\RTNullWindowHeight%
    \sy = \sx%
    \hy = \sy \multiply \hy by \nsy \advance \hy by \sy%
  \else 
    \sy = \RTWindowHeight \divide \sy by \nsy %
    \hy = \RTWindowHeight \advance \hy by \sy %
  \fi
  %% compute real height
  \nhl = \nsy \advance \nhl by 1 %
  \advance \nsy by -1 \advance \nsx by -1
  %% the picture
  \begin{pspicture}(0,0)(\RTWindowLength,\hy) %
    %% draw grid (if not invisible)
    \if\RTGridInvisible\RTDefGridInvisible
      \multips(0,\sy)(0,\sy){\nsy}{\psline[linecolor=lightgray]{-}(0,\sy)(\RTWindowLength,\sy)}%
      \multips(\sx,0)(\sx,0){\nsx}{\psline[linecolor=lightgray]{-}(0,\sy)(0,\hy)}%
      \psframe(0,\sy)(\RTWindowLength,\hy)%
    \else\relax
    \fi
    %% draw numbers (if not invisible)
    \if\RTNumbersInvisible\RTDefNumbersInvisible
      \tmp = #3 \divide \tmp by 2 \advance \tmp by 1%
      \pssetlength{\xx}{\sx}%
      \setcounter{myLabel}{\RTNumberOffset}
      \multido{\n=0+1}{\tmp}{%
        \uput{4pt}[d](\xx,\sy){%
          \usefont{T1}{phv}{m}{n}%
          \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
          \selectfont{\arabic{myLabel}}}%
        \psaddtolength{\xx}{\sx}%
        \psaddtolength{\xx}{\sx}%
        \addtocounter{myLabel}{2}
      }
    \else\relax
    \fi
    % 
    %% Task Names
    \setcounter{myLabel}{1}
    \pssetlength{\yy}{\hy}%
    \psaddtolength{\yy}{-\sy}
    \multido{\n=0+1}{#2}{%
      \uput{4pt}[d](-\sx,\yy){
        \usefont{T1}{phv}{m}{n}
        \fontsize{\RTTaskLabelSize}{\RTTaskLabelSize}
        \if\RTWriteSymbols\RTDefWriteSymbols\selectfont{$\RTTaskSymbol_{\arabic{myLabel}}$}
          \else\relax
        \fi
      }%
      \psaddtolength{\yy}{-3\sy}%
      \addtocounter{myLabel}{1}
    }%    
    %% Horizontal axes
    \xx = \sx \xxx = \RTWindowLength \advance \xxx by -\sx
    \yy = 2\sy 
    \multido{\n=0+1}{#2}{
      \psline{->}(\xx,\yy)(\xxx,\yy)
      \advance \yy by 3\sy
    }
}


\def\@RTDefaultValues{%
  \setkeys{RT}{height}%
  \setkeys{RT}{width}%
  \setkeys{RT}{labelsize}%
  \setkeys{RT}{numbersize}%
  \setkeys{RT}{symbol}%
  \setkeys{RT}{fillstyle}%
  \setkeys{RT}{color}
  \setkeys{RT}{linecolor}%
  \setkeys{RT}{xscale}%
  \setkeys{RT}{nosymbols}%
}

\def\@RTExecDefaultValues{
  \setkeys{RT}{color}%
  \setkeys{RT}{execlabel}%
  \setkeys{RT}{linecolor}%
}

\def\RTGridEnd{
    \end{pspicture}%
    \@RTDefaultValues%
}

\def\endRTGrid{
    \end{pspicture}%
    \@RTDefaultValues%
}

\newcommand{\RTSet}[1]{
  \setkeys{RT}{#1}
}

\newcommand{\RTSetDefault}{
  \@RTDefaultValues
}

%% internal
\newcommand{\@compute@xx}[1]{
  \xx = #1\sx
  \divide \xx by \RTXScale
  \advance \xx by \sx
}

\newcommand{\@compute@xxx}[1]{
  \xxx = #1\sx
  \divide \xxx by \RTXScale
  \advance \xxx by \sx
}

\newcommand{\@compute@yy}[1]{
  \yy = -3\sy \multiply \yy by #1
  \advance \yy by \hy
}


%% Task Arrival: draws an up arrow at the specified slot
%% #1  : task number from 1 to n
%% #2  : slot number from 0 to l-1
\newcommand{\TaskArrival}[3][nocommand=1]{%
    \setkeys{RT}{#1}%
    \@compute@yy{#2}
    \@compute@xx{#3}
    \yyy = \yy \advance \yyy by 2\sy%
    \psline[linecolor=\RTLineColor]{->}(\xx,\yy)(\xx,\yyy)%
    \@RTExecDefaultValues%
}

%% Task Arrival and deadline: draws an up arrow and a down arrow at the specified slots
%% #1  : task number from 1 to n
%% #2  : slot number from 0 to l-1
%% #3  : relative deadline
\newcommand{\TaskArrDead}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by 2\sy
  \psline[linecolor=\RTLineColor]{->}(\xx,\yy)(\xx,\yyy)
  \advance \xx by #4\sx
  \psline[linecolor=\RTLineColor]{->}(\xx,\yyy)(\xx,\yy)
  \@RTExecDefaultValues
}


%% Task Deadline: draws a down arrow at the specified slot
%% #1  : task number from 1 to n
%% #2  : slot number from 0 to l-1
\newcommand{\TaskDeadline}[3][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by 2\sy
  \psline[linecolor=\RTLineColor]{<-}(\xx,\yy)(\xx,\yyy)
  \@RTExecDefaultValues
}

\newcommand{\TaskExecution}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by \sy
  \@compute@xxx{#4}
  \psframe[fillstyle=\RTTaskFill,fillcolor=\RTTaskColor,linecolor=\RTLineColor](\xx,\yy)(\xxx,\yyy)
  \advance \xx by \xxx \xx = .5\xx
  \uput{2pt}[u](\xx,\yy){%
    \usefont{T1}{phv}{m}{n}%
    \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
    \selectfont{\RTExecLabel}%
  }
  \@RTExecDefaultValues
}

% Task Lock
% par 1:  task 
% par 2:  time
% par 3:  resource
%
\newcommand{\TaskLock}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by \sy
  \uput{2pt}[u](\xx,\yyy){%
    \usefont{T1}{phv}{m}{n}%
    \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
    \selectfont{L(#4)}%
  }
  \@RTExecDefaultValues
}

% \TaskUnlock
% par 1:  task 
% par 2:  time
% par 3:  resource
%
\newcommand{\TaskUnlock}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by \sy
  \uput{2pt}[u](\xx,\yyy){%
    \usefont{T1}{phv}{m}{n}%
    \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
    \selectfont{U(#4)}%
  }
  \@RTExecDefaultValues
}

% 
% par 1:  number of vertical slot 
% par 2:  time
% par 3:  label
%
\newcommand{\Label}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  %\@compute@yy{#2}
  \@compute@xx{#3}
  \yy = -\sy \multiply \yy by #2
  \advance \yy by \hy
  \yyy = \yy \advance \yyy by \sy
  \uput{2pt}[u](\xx,\yyy){%
    \psshadowbox{
      \usefont{T1}{phv}{m}{n}%
      \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
      \selectfont{{#4}}}%
  }
  \@RTExecDefaultValues
}

% 
% par 1:  higher priority task (from) 
% par 2:  lower priority task (to)
% par 3:  time
%
\newcommand{\Inherit}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#4}
  \yyy = -3\sy \multiply \yyy by #3 \advance \yyy by \sy
  \advance \yyy by \hy \advance \yyy by -\sy % \RTWindowHeight
  \psline[linestyle=dashed,linewidth=1.5pt]{->}(\xx,\yy)(\xx,\yyy)
  \@RTExecDefaultValues
}

% 
% par 1:  activating task (from) 
% par 2:  signal start time 
% par 3:  activated task (to)
% par 4:  signal arrival time
%
\newcommand{\Activation}[5][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = -3\sy \multiply \yyy by #4 %\advance \yyy by \sy
  \advance \yyy by \hy %\advance \yyy by -\sy %\RTWindowHeight
  \xxx = #5\sx \advance \xxx by \sx
  \psline[linestyle=dashed,linewidth=1pt]{->}(\xx,\yy)(\xxx,\yyy)
}

% 
% par 1:  time1
% par 2:  time2
%
\newcommand{\RTBox}[3][nocommand=1]{
  \setkeys{RT}{#1}%
  \yy = 0cm
  \advance \yy by \hy
  \yyy = \sy
  \@compute@xx{#2}
  \@compute@xxx{#3}
  \psframe[fillstyle=crosshatch,hatchwidth=.2pt,hatchsep=2pt,hatchcolor=lightgray,linewidth=0pt,framearc=.2](\xx,\yy)(\xxx,\yyy)
  \@RTExecDefaultValues
}

% %
% % par 1: task
% % par 2: first instant (arrival)
% % par 3: second instant (deadline)
% %
% \newcommand{\Interval}[4][nocommand=1]{
%   \setkeys{RT}{#1}%
%   \@compute@yy{#2}
%   \advance \yy by 2.5\sy
%   \@compute@xx{#3}
%   \@compute@xxx{#4}
%   % da cambiare con psarc
%   \pscurve*[linecolor=\RTLineColor]{-}(\xx,\yy)(\xxx,\yy)
%   \@RTExecDefaultValues  
% }

\newcommand{\RowLabel}[3][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \advance \yy by 1.5\sy
  \xx = \RTRowLabelOffset %\advance \xx by \sx
  \uput{4pt}[dl](-\xx,\yy){
    \usefont{T1}{phv}{m}{n}
    \fontsize{\RTTaskLabelSize}{\RTTaskLabelSize}
    \selectfont{#3}
  }%
}

\newcommand{\TaskExecDelta}[4][nocommand=1]{
  \setkeys{RT}{#1}%
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by \sy
  %\@compute@xxx{#4}
  \xxx = \xx \advance \xxx by #4\sx
  \psframe[fillstyle=\RTTaskFill,fillcolor=\RTTaskColor,linecolor=\RTLineColor](\xx,\yy)(\xxx,\yyy)
  \advance \xx by \xxx \xx = .5\xx
  \uput{2pt}[u](\xx,\yy){%
    \usefont{T1}{phv}{m}{n}%
    \fontsize{\RTNumberLabelSize}{\RTNumberLabelSize}%
    \selectfont{\RTExecLabel}%
  }
  \@RTExecDefaultValues
}

\newcommand{\TaskRespTime}[4][nocommand=1]{
  \setkeys{RT}{#1}
  \@compute@yy{#2}
  \@compute@xx{#3}
  \yyy = \yy \advance \yyy by \sy  
  \xxx = \xx \advance \xxx by #4\sx
  \psframe[fillstyle=crosshatch*,hatchcolor=white,
  hatchwidth=.4pt,hatchsep=1pt,
  linestyle=none,fillcolor=\RTTaskColor](\xx,\yy)(\xxx,\yyy)
  \@RTExecDefaultValues
}

\@ifclassloaded{beamer}{
  \renewcommand<>{\TaskArrival}[3][nocommand=1]{
    \only#4{\beameroriginal{\TaskArrival}[#1]{#2}{#3}}
  }
  \renewcommand<>{\TaskArrDead}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskArrDead}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\TaskDeadline}[3][nocommand=1]{
    \only#4{\beameroriginal{\TaskDeadline}[#1]{#2}{#3}}
  }
  \renewcommand<>{\TaskExecution}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskExecution}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\TaskExecDelta}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskExecDelta}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\TaskRespTime}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskRespTime}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\TaskLock}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskLock}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\TaskUnlock}[4][nocommand=1]{
    \only#5{\beameroriginal{\TaskUnlock}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\Label}[4][nocommand=1]{
    \only#5{\beameroriginal{\Label}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\Inherit}[4][nocommand=1]{
    \only#5{\beameroriginal{\Inherit}[#1]{#2}{#3}{#4}}
  }
  \renewcommand<>{\Activation}[5][nocommand=1]{
    \only#6{\beameroriginal{\Activation}[#1]{#2}{#3}{#4}{#5}}
  }
  \renewcommand<>{\RTBox}[3][nocommand=1]{
    \only#4{\beameroriginal{\RTBox}[#1]{#2}{#3}}
  }  
}
{
  \typeout{beamer not loaded}
}

\endinput