trait comsigs

code/__DEFINES/components.dm

@@ -43,6 +43,10 @@
 #define COMSIG_PARENT_PREQDELETED "parent_preqdeleted"			//before a datum's Destroy() is called: (force), returning a nonzero value will cancel the qdel operation
 #define COMSIG_PARENT_QDELETING "parent_qdeleting"				//just before a datum's Destroy() is called: (force), at this point none of the other components chose to interrupt qdel and Destroy will be called
 
+/// Trait signals
+#define COMPONENT_ADD_TRAIT (1<<0)
+#define COMPONENT_REMOVE_TRAIT (1<<1)
+
 // /atom signals
 #define COMSIG_PARENT_ATTACKBY "atom_attackby"			        //from base of atom/attackby(): (/obj/item, /mob/living, params)
 	#define COMPONENT_NO_AFTERATTACK 1								//Return this in response if you don't want afterattack to be called

code/__DEFINES/traits.dm

@@ -1,3 +1,5 @@
+#define SIGNAL_TRAIT(trait_ref) "trait [trait_ref]"
+
 // trait accessor defines
 #define ADD_TRAIT(target, trait, source) \
 	do { \
@@ -6,12 +8,14 @@
 			target.status_traits = list(); \
 			_L = target.status_traits; \
 			_L[trait] = list(source); \
+			SEND_SIGNAL(target, SIGNAL_TRAIT(trait), COMPONENT_ADD_TRAIT); \
 		} else { \
 			_L = target.status_traits; \
 			if (_L[trait]) { \
 				_L[trait] |= list(source); \
 			} else { \
 				_L[trait] = list(source); \
+				SEND_SIGNAL(target, SIGNAL_TRAIT(trait), COMPONENT_ADD_TRAIT); \
 			} \
 		} \
 	} while (0)
@@ -32,6 +36,7 @@
 			};\
 			if (!length(_L[trait])) { \
 				_L -= trait \
+				SEND_SIGNAL(target, SIGNAL_TRAIT(trait), COMPONENT_REMOVE_TRAIT); \
 			}; \
 			if (!length(_L)) { \
 				target.status_traits = null \
@@ -47,6 +52,7 @@
 				_L[_T] &= _S;\
 				if (!length(_L[_T])) { \
 					_L -= _T } \
+					SEND_SIGNAL(target, SIGNAL_TRAIT(trait), COMPONENT_REMOVE_TRAIT); \
 				};\
 				if (!length(_L)) { \
 					target.status_traits = null\