syntax

git-svn-id: svn://tug.org/texlive/trunk@1365 c570f23f-e606-0410-a88d-b1316a301751

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+% Dieses File ist dazu gedacht, im Vorspann von LaTeX Dokumenten vermittels
+% \include{syntax.tex} eingebunden zu werden. Es stellt dann die Umgebung
+% syntaxdiagramm zur Verfuegung, mit deren Hilfe Syntaxdiagramme fuer
+% z.B. Pascal erzeugt werden koennen. 
+%
+% syntax.tex benoetigt nur noch folgendes LaTeX Paket:
+%   - fancybox.sty
+% (Es muss im Vorspann des aufrufenden Dokumentes eingebunden werden.) 
+%
+% Beispiele zur Verwendung siehe: syntaxtest.tex 
+% zur naeheren Dokumentation siehe: syntaxintro.tex
+% zur Entwicklung des Codes siehe: syntaxdevel.tex
+%
+% Bernd Worsch 29.6.97 
+%
+% 05.07.97  \Leer als vertikale Stuetze
+%           groessere Abstaende in Alternativen-Umgebung 
+%
+% to-do-list:
+%   -- Oval fuer SynVar ueber picture erzeugen -> fancybox unnoetig
+%   -- Alternativen-Parameter automatisch bestimmen
+%   -- Dokumentation (syntaxuse.tex)
+%   -- Kommentare im Quelltext
+%   -- Als sty-File implementieren
+
+
+
+\typeout{Verwende: 'syntax.tex' v0.02 von Bernd Worsch}
+
+
+
+%%%% Anlegen der benoetigten Laengen und Boxen 
+
+\newlength{\breite}
+\newlength{\hoehe}
+\newlength{\tiefe}
+\newlength{\gesamthoehe}
+\newlength{\tmpLength}
+
+\newsavebox{\Messbox}
+
+\newlength{\LineLengStan}
+\newlength{\LineThikStan}
+\setlength{\LineLengStan}{4mm}
+\setlength{\LineThikStan}{\fboxrule}
+
+\newsavebox{\Centerbox}
+\newlength{\Centercor}
+
+\newlength{\VertSkipStan}
+\setlength{\VertSkipStan}{3mm}
+
+\newsavebox{\upperbox}
+\newsavebox{\lowerbox}
+\newsavebox{\togetherbox}
+\newlength{\VertLineLength}
+\newlength{\VertSkip}
+
+\newlength{\upperVertLineLength}
+\newlength{\lowerVertLineLength}
+
+\newlength{\tabulcor}
+
+%%%%% Beginn Syntaxdiagramm Befehle und Umgebungen
+
+\newenvironment{Syntaxdiagramm}[1][\PfeilR]%
+ {%
+%
+%%%% Befehl zum Vermessen von TeX-Strukturen
+%
+%\newcommand{\Messe}[1]
+% {
+%  \sbox{\Messbox}{##1}
+%
+%  \setlength{\breite}{\wd\Messbox}
+%  \setlength{\hoehe}{\ht\Messbox}
+%  \setlength{\tiefe}{\dp\Messbox}
+%  \setlength{\gesamthoehe}{\hoehe}
+%  \addtolength{\gesamthoehe}{\tiefe}
+%  \setlength{\tmpLength}{\hoehe}
+%  \addtolength{\tmpLength}{-\tiefe}
+%  \setlength{\tmpLength}{-0.5\tmpLength} 
+%
+%  \fbox
+%   {
+%    \begin{tabular}{ll}
+%      Breite:      & \the\breite      \\
+%      Hoehe:       & \the\hoehe       \\
+%      Tiefe:       & \the\tiefe       \\
+%      Gesamthoehe: & \the\gesamthoehe \\
+%      CenterCor:   & \the\tmpLength
+%    \end{tabular}
+% 
+%    \usebox{\Messbox}
+%   }
+% }
+%
+%%%% Befehl zum Justieren von Boxen 
+%
+\newcommand{\CenterToBaseLine}[1]
+  {%
+   \sbox{\Centerbox}{##1}%
+   \setlength{\Centercor}{\ht\Centerbox}%
+   \addtolength{\Centercor}{-\dp\Centerbox}%
+   \setlength{\Centercor}{-0.5\Centercor}%
+   \addtolength{\Centercor}{0.5\LineThikStan}%
+   \raisebox{\Centercor}{\usebox{\Centerbox}}%
+  }%
+%
+%%%% Grundelemente eines Syntaxdiagramms
+%
+\newcommand{\Leer}%
+  {\rule[-1.3ex]{0pt}{2.5ex}}%
+%
+\newcommand{\Linie}%
+  {\rule{\LineLengStan}{\LineThikStan}}%
+%
+\newcommand{\KurzeLinie}%
+  {\rule{0.5\LineLengStan}{\LineThikStan}}%
+%
+\newcommand{\Tri}
+  {%
+   \CenterToBaseLine
+   {%
+     \setlength{\unitlength}{1pt}%
+     \begin{picture}(0,0)%
+       \put(0,0){\vector(0,1){0}}%
+     \end{picture}%
+   }%
+  }%
+%
+\newcommand{\TriR}
+  {%
+   \CenterToBaseLine
+    {%
+     \setlength{\unitlength}{1pt}%
+     \begin{picture}(0,0)%
+       \put(0,0){\vector(1,0){0}}%
+     \end{picture}%
+    }%
+  }%
+%
+\newcommand{\TriD}
+  {%
+   \CenterToBaseLine
+    {%
+     \setlength{\unitlength}{1pt}%
+     \begin{picture}(0,0)%
+       \put(0,0){\vector(0,-1){0}}%
+     \end{picture}%
+    }%
+  }%
+%
+\newcommand{\TriL}
+  {%
+   \CenterToBaseLine
+    {%
+     \setlength{\unitlength}{1pt}%
+     \begin{picture}(0,0)%
+       \put(0,0){\vector(-1,0){0}}%
+     \end{picture}%
+    }%
+  }%
+%
+\newcommand{\Dots}
+  {%
+   \CenterToBaseLine
+    {%
+     ...%
+    }%
+  }%
+%
+\newcommand{\SynVar}[1]%
+  {%
+   \CenterToBaseLine%
+    {%
+     \fbox%
+      {%
+       \rule{0.1em}{0pt}%
+       \rule[-0.3ex]{0pt}{2ex}%
+       ##1%
+       \rule{0.1em}{0pt}%
+      }%
+    }%
+  }%
+%
+\newcommand{\TerSym}[1]%
+  {%
+   \CenterToBaseLine%
+    {%
+     \ovalbox%
+      {%
+       \rule{0.2em}{0pt}%
+       \rule[-0.2ex]{0pt}{1.8ex}%
+       ##1%
+       \rule{0.2em}{0pt}%
+      }%
+    }%
+  }%
+%
+%%%% Kombinierte Grafische Elemente
+%
+\newcommand{\Ellipse}%
+ {%
+  \Linie\ \Dots\ \Linie%
+ }%
+%
+\newcommand{\PfeilR}%
+ {%
+  \Linie\TriR%
+ }%
+%
+\newcommand{\PfeilL}%
+ {%
+  \TriL\Linie%
+ }%
+%
+\newcommand{\SynVarR}[1]%
+ {%
+  \PfeilR\SynVar{##1}\Linie%
+ }%
+%
+\newcommand{\SynVarL}[1]%
+ {%
+  \Linie\SynVar{##1}\PfeilL%
+ }%
+%
+\newcommand{\TerSymR}[1]%
+ {%
+  \PfeilR\TerSym{##1}\Linie%
+ }%
+%
+\newcommand{\TerSymL}[1]%
+ {%
+  \Linie\TerSym{##1}\PfeilL%
+ }%
+%
+%%%% Vertikale grafische Elemente
+%
+\newcommand{\LinieO}[1]%
+ {%
+  \CenterToBaseLine%
+   {%
+    \raisebox{0pt}[0pt][0pt]%
+     {%
+      \makebox[0mm][c]{\rule{\LineThikStan}{##1}}%
+     }%
+   }%
+ }%
+%
+\newcommand{\LinieU}[1]%
+ {%
+  \CenterToBaseLine%
+   {%
+    \raisebox{0pt}[0pt][0pt]%
+     {%
+      \makebox[0mm][c]{\rule[-##1]{\LineThikStan}{##1}}%
+     }%
+   }%
+ }%
+%
+\newcommand{\PfeilO}[1]%
+ {%
+  \CenterToBaseLine%
+   {%
+    \raisebox{0pt}[0pt][0pt]%
+     {%
+      \makebox[0mm][c]{\TriD}%
+      \makebox[0mm][c]{\rule{\LineThikStan}{##1}}%
+     }%
+   }%
+ }%
+%
+\newcommand{\PfeilU}[1]%
+ {%
+  \CenterToBaseLine%
+   {%
+    \raisebox{0pt}[0pt][0pt]%
+     {%
+      \makebox[0mm][c]{\Tri}%
+      \makebox[0mm][c]{\rule[-##1]{\LineThikStan}{##1}}%
+     }%
+   }%
+ }%
+%
+%%%% Strukturen
+%
+%%% Wiederholung
+%
+\newcommand{\Wiederholung}[2]%
+ {%
+  \sbox{\upperbox}{##1}%
+  \sbox{\lowerbox}{##2}%
+  \setlength{\VertLineLength}{\dp\upperbox}%
+  \addtolength{\VertLineLength}{\ht\lowerbox}%
+  \addtolength{\VertLineLength}{\VertSkipStan}%
+  \addtolength{\VertLineLength}{0.5\LineThikStan}%
+  \setlength{\VertSkip}{\VertSkipStan}%
+  \addtolength{\VertSkip}{\dp\upperbox}%
+%
+  \Linie%
+  \PfeilU{\VertLineLength}%
+% 
+  \renewcommand{\arraystretch}{0}%
+  \begin{tabular}[t]%              % Zwei Eintraege
+   {%
+    @{\hrulefill}%                 % Verbindungslinie 1
+    c%                             % Eintraege Zentrieren
+    @{\hrulefill}%                 % Verbindungslinie 2
+   }%
+   \PfeilR\usebox{\upperbox}\Linie\\[\VertSkip]  % Dies wiederholen
+   \Linie\usebox{\lowerbox}\PfeilL%              % Dies in Gegenrichtung
+  \end{tabular}%
+%
+  \LinieU{\VertLineLength}%
+  \Linie%
+ }%
+%
+%%% Alternative
+%
+\newcommand{\Alternative}[2]%
+ {%
+  \sbox{\upperbox}{##1}%
+  \sbox{\lowerbox}{##2}%
+%
+  \setlength{\upperVertLineLength}{\dp\upperbox}%
+  \addtolength{\upperVertLineLength}{0.5\VertSkipStan}%
+  \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+%
+  \setlength{\lowerVertLineLength}{\ht\lowerbox}%
+  \addtolength{\lowerVertLineLength}{0.5\VertSkipStan}%
+  \addtolength{\lowerVertLineLength}{0.5\LineThikStan}%
+%
+  \setlength{\VertSkip}{\VertSkipStan}%
+  \addtolength{\VertSkip}{\dp\upperbox}%
+%
+  \Linie%
+  \LinieO{\upperVertLineLength}%
+  \LinieU{\lowerVertLineLength}%
+% 
+  \renewcommand{\arraystretch}{0}%
+  \addtolength{\upperVertLineLength}{-0.5\LineThikStan}%
+  \raisebox{\upperVertLineLength}%
+   {% 
+    \begin{tabular}[t]%                 % Zwei Eintraege
+     {%
+      @{\hrulefill}%                 % Verbindungslinie 1
+      c%                             % Eintraege Zentrieren
+      @{\hrulefill}%                 % Verbindungslinie 2
+     }%
+     \PfeilR\usebox{\upperbox}\Linie\\[\VertSkip]  % Weg1
+     \PfeilR\usebox{\lowerbox}\Linie%              % Weg2
+    \end{tabular}%
+   }%
+  \renewcommand{\arraystretch}{1}%
+  \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+%
+  \LinieO{\upperVertLineLength}%
+  \LinieU{\lowerVertLineLength}%
+  \Linie%
+ }%
+%
+%%% Stapel
+%
+\newcommand{\Stapel}[2]%
+ {%
+  \sbox{\upperbox}{##1}%
+  \sbox{\lowerbox}{##2}%
+%
+  \setlength{\upperVertLineLength}{\dp\upperbox}%
+  \addtolength{\upperVertLineLength}{0.5\VertSkipStan}%
+  \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+%
+  \setlength{\lowerVertLineLength}{\ht\lowerbox}%
+  \addtolength{\lowerVertLineLength}{0.5\VertSkipStan}%
+  \addtolength{\lowerVertLineLength}{0.5\LineThikStan}%
+%
+  \setlength{\VertSkip}{0.5\VertSkipStan}%
+  \addtolength{\VertSkip}{\dp\upperbox}%
+  \addtolength{\VertSkip}{-1\LineThikStan}% 
+%
+  \Linie%
+  \LinieO{\upperVertLineLength}% 
+  \addtolength{\lowerVertLineLength}{-0.5\LineThikStan}%
+  \raisebox{\upperVertLineLength}{\KurzeLinie}%
+  \addtolength{\lowerVertLineLength}{0.5\LineThikStan}%
+  \LinieU{\lowerVertLineLength}%
+%
+  \renewcommand{\arraystretch}{0}%
+  \addtolength{\upperVertLineLength}{-0.5\LineThikStan}%
+  \raisebox{\upperVertLineLength}%
+   {% 
+    \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+    \begin{tabular}[t]%              % Zwei Eintraege
+     {%
+      @{\hrulefill}%   % Verbindungslinie 1
+      c%               % Eintraege Zentrieren
+      @{\hrulefill}%   % Verbindungslinie 2
+     }%
+     \PfeilR\usebox{\upperbox}\Linie\\[\VertSkip]  % oberer Eintrag
+     \PfeilL\\[0.5\VertSkipStan]%
+     \PfeilR\usebox{\lowerbox}\Linie%              % unterer Eintrag
+    \end{tabular}%
+   }%
+  \renewcommand{\arraystretch}{1}%
+  \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+%
+  \LinieO{\upperVertLineLength}%
+  \addtolength{\lowerVertLineLength}{-0.5\LineThikStan}%
+  \raisebox{-\lowerVertLineLength}{\KurzeLinie}%
+  \addtolength{\lowerVertLineLength}{0.5\LineThikStan}%
+  \LinieU{\lowerVertLineLength}%
+  \Linie%
+ }%
+%
+%%%% Die Alternativen-Umgebung
+%
+\newenvironment{Alternativen}[2]%
+ {%
+  \renewcommand{\arraystretch}{2}%
+  \setlength{\tabulcor}{9.3pt}%
+  \sbox{\upperbox}{##1}%
+  \sbox{\lowerbox}{##2}%
+%
+  \begin{lrbox}{\togetherbox}% 
+    \begin{tabular}[t]%              % Zwei Eintraege
+     {%
+      @{\hrulefill}%                 % Verbindungslinie 1
+      c%                             % Eintraege Zentrieren
+      @{\hrulefill}%                 % Verbindungslinie 2
+     }%
+     \PfeilR\usebox{\upperbox}\Linie\\             % erster Weg 
+ }%
+%                                                  % weitere Wege
+ {%
+     \PfeilR\usebox{\lowerbox}\Linie%              % letzter Weg
+    \end{tabular}%
+  \end{lrbox}% 
+%
+  \setlength{\upperVertLineLength}{0.5\dp\togetherbox}%
+  \addtolength{\upperVertLineLength}{0.5\ht\togetherbox}%
+  \addtolength{\upperVertLineLength}{-\ht\upperbox}%
+  \addtolength{\upperVertLineLength}{0.5\LineThikStan}%
+  \addtolength{\upperVertLineLength}{-\tabulcor}%
+%
+  \setlength{\lowerVertLineLength}{0.5\dp\togetherbox}%
+  \addtolength{\lowerVertLineLength}{0.5\ht\togetherbox}%
+  \addtolength{\lowerVertLineLength}{-\dp\lowerbox}%
+%
+  \Linie%
+  \LinieO{\upperVertLineLength}%
+  \LinieU{\lowerVertLineLength}%
+% 
+  \CenterToBaseLine{\usebox{\togetherbox}}%
+%  
+  \LinieO{\upperVertLineLength}%
+  \LinieU{\lowerVertLineLength}%
+  \Linie%
+ }%
+%
+%%%%% Ende Syntaxdiagramm Befehle und Umgebungen
+%
+  \providecommand{\ContSym}{#1}
+  \renewcommand{\ContSym}{#1}
+  \begin{lrbox}{\Messbox}%
+ }%
+ {%
+  \end{lrbox}%
+  \setlength{\hoehe}{\ht\Messbox}%
+  \addtolength{\hoehe}{\VertSkipStan}%
+  \setlength{\tiefe}{\dp\Messbox}%
+  \addtolength{\tiefe}{\VertSkipStan}%
+  \raisebox{0pt}[\hoehe][\tiefe]%
+   {%
+    \Linie%
+    \usebox{\Messbox}%
+    \ContSym%
+   }%
+ }%
+%
+%%%%% --Und Schluss--
+