Frame stacking fix and unit test addition. (#56287)

* Reverts #56205

* Allow things without density to bypass checks

* The rest of the owl

* The rest of the owl

* Doc and tweak

* More feex

* RCD machine frame unit test

* I suck

* AAAAA

* Bad at unit tests

* Revert unit tests (for including in another PR)

* Fix windoor_assembly return logic

* Comment /mob/living/proc/PushAM logic

* Windoor assembley logic tweak

* Fix frame stacking

* Unit test

* Better wording from macros?

code/game/objects/structures/windoor_assembly.dm

@@ -18,8 +18,8 @@
 	anchored = FALSE
 	density = FALSE
 	dir = NORTH
+	set_dir_on_move = FALSE
 
-	var/ini_dir
 	var/obj/item/electronics/airlock/electronics = null
 	var/created_name = null
 
@@ -33,7 +33,6 @@
 	..()
 	if(set_dir)
 		setDir(set_dir)
-	ini_dir = dir
 	air_update_turf(TRUE, TRUE)
 
 /obj/structure/windoor_assembly/Destroy()
@@ -44,7 +43,6 @@
 /obj/structure/windoor_assembly/Move()
 	var/turf/T = loc
 	. = ..()
-	setDir(ini_dir)
 	move_update_air(T)
 
 /obj/structure/windoor_assembly/update_icon_state()
@@ -52,18 +50,16 @@
 
 /obj/structure/windoor_assembly/CanAllowThrough(atom/movable/mover, turf/target)
 	. = ..()
-	if(get_dir(loc, target) == dir) //Make sure looking at appropriate border
+
+	if(get_dir(loc, target) == dir)
 		return
+
 	if(istype(mover, /obj/structure/window))
-		var/obj/structure/window/W = mover
-		if(!valid_window_location(loc, W.ini_dir))
-			return FALSE
-	else if(istype(mover, /obj/structure/windoor_assembly))
-		var/obj/structure/windoor_assembly/W = mover
-		if(!valid_window_location(loc, W.ini_dir))
-			return FALSE
-	else if(istype(mover, /obj/machinery/door/window) && !valid_window_location(loc, mover.dir))
-		return FALSE
+		var/obj/structure/window/moved_window = mover
+		return valid_window_location(loc, moved_window.dir, is_fulltile = moved_window.fulltile)
+
+	if(istype(mover, /obj/structure/windoor_assembly) || istype(mover, /obj/machinery/door/window))
+		return valid_window_location(loc, mover.dir, is_fulltile = FALSE)
 
 /obj/structure/windoor_assembly/CanAtmosPass(turf/T)
 	if(get_dir(loc, T) == dir)
@@ -321,13 +317,12 @@
 		return FALSE
 	var/target_dir = turn(dir, rotation_type == ROTATION_CLOCKWISE ? -90 : 90)
 
-	if(!valid_window_location(loc, target_dir))
+	if(!valid_window_location(loc, target_dir, is_fulltile = FALSE))
 		to_chat(user, "<span class='warning'>[src] cannot be rotated in that direction!</span>")
 		return FALSE
 	return TRUE
 
 /obj/structure/windoor_assembly/proc/after_rotation(mob/user)
-	ini_dir = dir
 	update_icon()
 
 //Flips the windoor assembly, determines whather the door opens to the left or the right