[MIRROR] Click signals (#2903)

* Merge pull request #30924 from ninjanomnom/click-signals

Click signals

* Click signals

code/_onclick/click.dm

@@ -32,6 +32,7 @@
 */
 /atom/Click(location,control,params)
 	if(initialized)
+		SendSignal(COMSIG_CLICK, location, control, params)
 		usr.ClickOn(src, params)
 
 /atom/DblClick(location,control,params)
@@ -305,6 +306,7 @@
 	A.ShiftClick(src)
 	return
 /atom/proc/ShiftClick(mob/user)
+	SendSignal(COMSIG_CLICK_SHIFT, user)
 	if(user.client && user.client.eye == user || user.client.eye == user.loc)
 		user.examinate(src)
 	return
@@ -319,6 +321,7 @@
 	return
 
 /atom/proc/CtrlClick(mob/user)
+	SendSignal(COMSIG_CLICK_CTRL, user)
 	var/mob/living/ML = user
 	if(istype(ML))
 		ML.pulled(src)
@@ -348,6 +351,7 @@
 		..()
 
 /atom/proc/AltClick(mob/user)
+	SendSignal(COMSIG_CLICK_ALT, user)
 	var/turf/T = get_turf(src)
 	if(T && user.TurfAdjacent(T))
 		if(user.listed_turf == T)
@@ -373,6 +377,7 @@
 	return
 
 /atom/proc/CtrlShiftClick(mob/user)
+	SendSignal(COMSIG_CLICK_CTRL_SHIFT)
 	return
 
 /*