Keep track of startup notifications in a TAILQ, save workspace

include/data.h

@@ -138,6 +138,20 @@ struct Ignore_Event {
     SLIST_ENTRY(Ignore_Event) ignore_events;
 };
 
+/**
+ * Stores internal information about a startup sequence, like the workspace it
+ * was initiated on.
+ *
+ */
+struct Startup_Sequence {
+    /** startup ID for this sequence, generated by libstartup-notification */
+    char *id;
+    /** workspace on which this startup was initiated */
+    char *workspace;
+
+    TAILQ_ENTRY(Startup_Sequence) sequences;
+};
+
 /**
  * Regular expression wrapper. It contains the pattern itself as a string (like
  * ^foo[0-9]$) as well as a pointer to the compiled PCRE expression and the