More code.

data.h

@@ -3,7 +3,32 @@
  *
  */
 
+/*
+ * Defines a position in the table
+ *
+ */
+typedef struct Cell {
+	int row;
+	int column;
+} Cell;
+
+/*
+ * We need to save the height of a font because it is required for each drawing of
+ * text but relatively hard to get. As soon as a new font needs to be loaded, a
+ * Font-entry will be filled for later use.
+ *
+ */
 typedef struct Font {
 	char *name;
 	int height;
 } Font;
+
+/*
+ * A client is X11-speak for a window.
+ *
+ */
+typedef struct Client {
+	/* TODO: this is NOT final */
+	Cell old_position; /* if you set a client to floating and set it back to managed,
+			      it does remember its old position and *tries* to get back there */
+} Client;