Merge pull request #6703 from Citadel-Station-13/upstream-merge-37656

[MIRROR] Fixes EMPs not working on people/backpacks/other storage being carried on people

code/datums/components/storage/concrete/_concrete.dm

@@ -73,6 +73,8 @@
 		slave.refresh_mob_views()
 
 /datum/component/storage/concrete/emp_act(severity)
+	if(emp_shielded)
+		return
 	var/atom/real_location = real_location()
 	for(var/i in real_location)
 		var/atom/A = i

code/datums/components/storage/storage.dm

@@ -369,10 +369,10 @@
 		. = TRUE //returns TRUE if any mobs actually got a close(M) call
 
 /datum/component/storage/proc/emp_act(severity)
-	var/atom/A = parent
-	if(!isliving(A.loc) && !emp_shielded)
-		var/datum/component/storage/concrete/master = master()
-		master.emp_act(severity)
+	if(emp_shielded)
+		return
+	var/datum/component/storage/concrete/master = master()
+	master.emp_act(severity)
 
 //This proc draws out the inventory and places the items on it. tx and ty are the upper left tile and mx, my are the bottm right.
 //The numbers are calculated from the bottom-left The bottom-left slot being 1,1.
@@ -455,23 +455,24 @@
 		return FALSE
 	handle_item_insertion(I, FALSE, M)
 
-/datum/component/storage/proc/return_inv()
-	. = list()
-	. += contents()
-	for(var/i in contents())
-		var/atom/a = i
-		GET_COMPONENT_FROM(STR, /datum/component/storage, a)
-		if(STR)
-			. += STR.return_inv()
+/datum/component/storage/proc/return_inv(recursive)
+	var/list/ret = list()
+	ret |= contents()
+	if(recursive)
+		for(var/i in ret.Copy())
+			var/atom/A = i
+			A.SendSignal(COMSIG_TRY_STORAGE_RETURN_INVENTORY, ret, TRUE)
+	return ret
 
 /datum/component/storage/proc/contents()			//ONLY USE IF YOU NEED TO COPY CONTENTS OF REAL LOCATION, COPYING IS NOT AS FAST AS DIRECT ACCESS!
 	var/atom/real_location = real_location()
 	return real_location.contents.Copy()
 
-/datum/component/storage/proc/signal_return_inv(list/interface)
+//Abuses the fact that lists are just references, or something like that.
+/datum/component/storage/proc/signal_return_inv(list/interface, recursive = TRUE)
 	if(!islist(interface))
 		return FALSE
-	interface |= return_inv()
+	interface |= return_inv(recursive)
 	return TRUE
 
 /datum/component/storage/proc/mousedrop_onto(atom/over_object, mob/M)