event: add dom_event internal_type field

dom_event internal field stores information about the dom_event type.
Pure libdom events will always have internal type set to 0.

If you pass your event casted as dom_event, use internal_type to store
your type information.

include/dom/events/event.h

@@ -113,4 +113,12 @@ dom_exception _dom_event_set_is_trusted(dom_event *evt, bool trusted);
 #define dom_event_set_is_trusted(e,t) _dom_event_set_is_trusted(	\
 		(dom_event *) (e), (bool) (t))
 
+dom_exception _dom_event_get_internal_type(dom_event *evt, int *result);
+#define dom_event_get_internal_type(e,t) _dom_event_get_internal_type(	\
+		(dom_event *) (e), (int *) (r))
+
+dom_exception _dom_event_set_internal_type(dom_event *evt, int type);
+#define dom_event_set_internal_type(e,t) _dom_event_set_internal_type(	\
+		(dom_event *) (e), (int) (t))
+
 #endif

src/events/event.c

@@ -59,6 +59,8 @@ dom_exception _dom_event_initialise(dom_event *evt)
 	evt->is_initialised = false;
 	evt->is_trusted = true;
 
+	evt->internal_type = 0;
+
 	return DOM_NO_ERR;
 }
 
@@ -396,3 +398,31 @@ dom_exception _dom_event_set_is_trusted(dom_event *evt, bool trusted)
 
 	return DOM_NO_ERR;
 }
+
+/**
+ * Get the internal type of this event
+ *
+ * \param evt     The event object
+ * \param result  The returned value
+ * \return DOM_NO_ERR.
+ */
+dom_exception _dom_event_get_internal_type(dom_event *evt, int *result)
+{
+	*result = evt->internal_type;
+
+	return DOM_NO_ERR;
+}
+
+/**
+ * Set the internal type of this event
+ *
+ * \param evt     The event object
+ * \param type 	  The internal type
+ * \return DOM_NO_ERR.
+ */
+dom_exception _dom_event_set_internal_type(dom_event *evt, int type)
+{
+	evt->internal_type = type;
+
+	return DOM_NO_ERR;
+}

src/events/event.h

@@ -50,6 +50,8 @@ struct dom_event {
 	bool in_dispatch;	/**< Whether this event is in dispatch */
 	bool is_initialised;	/**< Whether this event is initialised */
 	bool is_trusted;	/**< Whether this event is trusted */
+
+	unsigned int internal_type; /**< always 0 for a pure libdom event. */
 };
 
 /* Destructor */