Implement Untitled Tasks

homework.dtx

@@ -380,6 +380,8 @@
 
 % \subsubsection{Tasks}
 
+% \changes{v1.1}{2017/04/16}{Support Untitled Tasks}
+
 % The task mechanism of the \textsf{homework} class implements its own numbering
 % mechanism. This is neccessary because the task numbers are not necessarily
 % placed at the beginning of the title of a section.
@@ -402,7 +404,11 @@
         \setcounter{task}{#1}%
     }%
     \if@tasknumbers%
-        \section{Aufgabe \arabic{task}: #2}%
+        \ifstrempty{#2}{%
+            \section{Aufgabe \arabic{task}}%
+        }{%
+            \section{Aufgabe \arabic{task}: #2}%
+        }%
     \else%
         \section{#2}%
     \fi%
@@ -422,7 +428,11 @@
         \setcounter{subtask}{#1}%
     }%
     \if@tasknumbers%
-        \subsection{\arabic{task}.\arabic{subtask}. #2}%
+        \ifstrempty{#2}{%
+            \subsection{Teilaufgabe \arabic{task}.\arabic{subtask}}%
+        }{%
+            \subsection{\arabic{task}.\arabic{subtask}. #2}%
+        }%
     \else%
         \subsection{#2}%
     \fi%
@@ -443,7 +453,11 @@
         \setcounter{subsubtask}{#1}%
     }%
     \if@tasknumbers%
-        \subsubsection{\arabic{task}.\arabic{subtask}.\arabic{subsubtask}. #2}%
+        \ifstrempty{#2}{%
+            \subsection{\arabic{task}.\arabic{subtask}.\arabic{subsubtask}}
+        }{%
+            \subsubsection{\arabic{task}.\arabic{subtask}.\arabic{subsubtask}. #2}%
+        }%
     \else%
         \subsubsection{#2}%
     \fi%
@@ -531,9 +545,9 @@
     \else
         \def\homework@university{\@university}
         \def\homework@course{\@course}
-    \fi
-
+    \fi%
     %    \end{macrocode}
+
     % First we define the different layout parts. The title has six \emph{slots}
     % each of which can hold a piece of text:
     % \begin{description}
@@ -582,8 +596,8 @@
         \def\titleright{\@date}%
         \def\title{\@title}%
     }%
-
     %    \end{macrocode}
+
     % The following code prints the title with the information specified above.
     % Depending on the value of |\ifextended| the title will be longer or
     % shorter.