Polish Dropship Weapons UI (#5298)

# About the pull request

This PR is a follow up to #4812 polishing minor issues that were
discovered but not addressed in that PR.

- Fire missions can now be scrolled in target acquisition
- The target selection in equipment view is now the same as other panels
(and can be scrolled now too)
- Fixed deploying equipment like the spotlight and sentry
- ~~Partially~~ fixed camera view for sentry ~~(map size doesn't always
get set correctly some reason)~~
- Fixed the extra scrolling of fire missions
- Fixed the scrolling of target selection being a fixed quantity of 10
targets
- Improved menuing for the fire mission and strike sub menus
- Fixed strike ready messaging
- Map and Cam buttons are now mutually exclusive to one another (would
just break the byond UI)
- Camera now resets when a CAS flare is destroyed (unless fire mission
is underway)
- Camera now resets when sentry undeploys (if it was being used)
- Tweaked some button placements
- Fixed medevac layout
- Fixed direct fire (strike & equipment)
- Fixed camera views not handling /datum/component/overlay_lighting
correctly (fixed by using TILE_BOUND planes; but will note it won't work
completely correct if on a byond version prior to 515.1609 because of
https://www.byond.com/forum/post/2873835)
- Fixed some hard deletes in `/client/proc/clear_map` based on
tgstation/tgstation#61562
- Renamed nvgon and nvgoff to NV-ON and NV-OFF

# Explain why it's good for the game

Fixes issues such as (but not limited to): 

![target](https://github.com/cmss13-devs/cmss13/assets/76988376/7e1b8389-d466-4ef0-a436-a91c19c53c60)

![image](https://github.com/cmss13-devs/cmss13/assets/76988376/5c291ca5-204a-49c3-b281-32b7f4fc530a)

# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>


![image](https://github.com/cmss13-devs/cmss13/assets/76988376/f8db9791-5c8d-4dc2-90bb-7a8b91f6fde9)

![image](https://github.com/cmss13-devs/cmss13/assets/76988376/c1a659af-8d05-408f-89e8-c95597cfc79a)

![image](https://github.com/cmss13-devs/cmss13/assets/76988376/858c307c-1914-48dc-98ed-5fba6c2429e0)

![light](https://github.com/cmss13-devs/cmss13/assets/76988376/755c270f-5269-473f-897f-354bba3a5353)

</details>


# Changelog
:cl: Drathek
ui: Polished various aspects of the new dropship weapons UI
fix: Fixed CAS direct firing
fix: Fixed Medevac buttons not moving the dropship (still currently
requires manual winch)
fix: Fixed camera_manager resizing the view incorrectly because of
overlay_lighting
refactor: Ported some hard delete fixes for maps.
/:cl:

code/_onclick/hud/map_popups.dm

@@ -118,10 +118,11 @@
  * anyway. they're effectively qdel'd.
  */
 /client/proc/clear_map(map_name)
-	if(!map_name || !(map_name in screen_maps))
+	if(!map_name || !screen_maps[map_name])
 		return FALSE
 	for(var/atom/movable/screen/screen_obj in screen_maps[map_name])
 		screen_maps[map_name] -= screen_obj
+		remove_from_screen(screen_obj)
 		if(screen_obj.del_on_map_removal)
 			qdel(screen_obj)
 	screen_maps -= map_name

code/game/camera_manager/camera_manager.dm

@@ -25,13 +25,16 @@
 	. = ..()
 	map_name = "camera_manager_[REF(src)]_map"
 	cam_screen = new
+	cam_screen.icon = null
 	cam_screen.name = "screen"
 	cam_screen.assigned_map = map_name
 	cam_screen.del_on_map_removal = FALSE
 	cam_screen.screen_loc = "[map_name]:1,1"
+	cam_screen.appearance_flags |= TILE_BOUND
 	cam_background = new
 	cam_background.assigned_map = map_name
 	cam_background.del_on_map_removal = FALSE
+	cam_background.appearance_flags |= TILE_BOUND
 
 	cam_plane_masters = list()
 	for(var/plane in subtypesof(/atom/movable/screen/plane_master) - /atom/movable/screen/plane_master/blackness)
@@ -42,14 +45,17 @@
 	. = ..()
 	range_turfs = null
 	current_area = null
-	cam_plane_masters = null
+	QDEL_LIST_ASSOC_VAL(cam_plane_masters)
 	QDEL_NULL(cam_background)
 	QDEL_NULL(cam_screen)
 	if(current)
 		UnregisterSignal(current, COMSIG_PARENT_QDELETING)
+	current = null
+	last_camera_turf = null
 
 /datum/component/camera_manager/proc/add_plane(atom/movable/screen/plane_master/instance)
 	instance.assigned_map = map_name
+	instance.appearance_flags |= TILE_BOUND
 	instance.del_on_map_removal = FALSE
 	if(instance.blend_mode_override)
 		instance.blend_mode = instance.blend_mode_override
@@ -61,8 +67,8 @@
 	var/client/user_client = user.client
 	if(!user_client)
 		return
-	user_client.register_map_obj(cam_background)
 	user_client.register_map_obj(cam_screen)
+	user_client.register_map_obj(cam_background)
 	for(var/plane_id in cam_plane_masters)
 		user_client.register_map_obj(cam_plane_masters[plane_id])
 
@@ -71,14 +77,10 @@
 	var/client/user_client = user.client
 	if(!user_client)
 		return
-	user_client.clear_map(cam_background)
-	user_client.clear_map(cam_screen)
-	for(var/plane_id in cam_plane_masters)
-		user_client.clear_map(cam_plane_masters[plane_id])
+	user_client.clear_map(map_name)
 
 /datum/component/camera_manager/RegisterWithParent()
 	. = ..()
-	START_PROCESSING(SSdcs, src)
 	SEND_SIGNAL(parent, COMSIG_CAMERA_MAPNAME_ASSIGNED, map_name)
 	RegisterSignal(parent, COMSIG_CAMERA_REGISTER_UI, PROC_REF(register))
 	RegisterSignal(parent, COMSIG_CAMERA_UNREGISTER_UI, PROC_REF(unregister))
@@ -90,8 +92,6 @@
 
 /datum/component/camera_manager/UnregisterFromParent()
 	. = ..()
-	STOP_PROCESSING(SSdcs, src)
-
 	UnregisterSignal(parent, COMSIG_CAMERA_REGISTER_UI)
 	UnregisterSignal(parent, COMSIG_CAMERA_UNREGISTER_UI)
 	UnregisterSignal(parent, COMSIG_CAMERA_SET_NVG)
@@ -134,6 +134,8 @@
 	target_x = x
 	target_y = y
 	target_z = z
+	target_width = w
+	target_height = h
 	update_area_camera()
 
 /datum/component/camera_manager/proc/enable_nvg(source, power, matrixcol)
@@ -152,10 +154,10 @@
 
 /datum/component/camera_manager/proc/sync_lighting_plane_alpha(lighting_alpha)
 	var/atom/movable/screen/plane_master/lighting/lighting = cam_plane_masters["[LIGHTING_PLANE]"]
-	if (lighting)
+	if(lighting)
 		lighting.alpha = lighting_alpha
 	var/atom/movable/screen/plane_master/lighting/exterior_lighting = cam_plane_masters["[EXTERIOR_LIGHTING_PLANE]"]
-	if (exterior_lighting)
+	if(exterior_lighting)
 		exterior_lighting.alpha = min(GLOB.minimum_exterior_lighting_alpha, lighting_alpha)
 
 /**
@@ -215,7 +217,7 @@
 	var/turf/target = locate(current_area.center_x, current_area.center_y, target_z)
 
 	var/list/visible_things = isXRay ? range("[x_size]x[y_size]", target) : view("[x_size]x[y_size]", target)
-	src.render_objects(visible_things)
+	render_objects(visible_things)
 
 /datum/component/camera_manager/proc/render_objects(list/visible_things)
 	var/list/visible_turfs = list()

code/game/cas_manager/datums/cas_fire_envelope.dm

@@ -19,14 +19,15 @@
 	var/datum/cas_signal/recorded_loc = null
 
 	var/obj/effect/firemission_guidance/guidance
-
+	var/atom/tracked_object
 
 /datum/cas_fire_envelope/New()
 	..()
 	missions = list()
 
 /datum/cas_fire_envelope/Destroy(force, ...)
 	linked_console = null
+	untrack_object()
 	return ..()
 
 /datum/cas_fire_envelope/ui_data(mob/user)
@@ -151,7 +152,9 @@
 	recorded_loc = marker
 	return TRUE
 
-/datum/cas_fire_envelope/proc/change_current_loc(location)
+/datum/cas_fire_envelope/proc/change_current_loc(location, atom/object)
+	if(object)
+		untrack_object()
 	if(!location && guidance)
 		for(var/mob/M in guidance.users)
 			if(istype(M) && M.client)
@@ -162,6 +165,21 @@
 		guidance = new /obj/effect/firemission_guidance()
 	guidance.forceMove(location)
 	guidance.updateCameras(linked_console)
+	if(object)
+		tracked_object = object
+		RegisterSignal(tracked_object, COMSIG_PARENT_QDELETING, PROC_REF(on_tracked_object_del))
+
+/// Call to unregister the on_tracked_object_del behavior
+/datum/cas_fire_envelope/proc/untrack_object()
+	if(tracked_object)
+		UnregisterSignal(tracked_object, COMSIG_PARENT_QDELETING)
+		tracked_object = null
+
+/// Signal handler for when we are viewing a object in cam is qdel'd (but camera actually is actually some other obj)
+/datum/cas_fire_envelope/proc/on_tracked_object_del(atom/target)
+	SIGNAL_HANDLER
+	tracked_object = null
+	change_current_loc()
 
 /datum/cas_fire_envelope/proc/user_is_guided(user)
 	return guidance && (user in guidance.users)

code/game/machinery/computer/camera_console.dm

@@ -58,9 +58,8 @@
 	SStgui.close_uis(src)
 	QDEL_NULL(current)
 	QDEL_NULL(cam_screen)
-	qdel(cam_screen)
 	QDEL_NULL(cam_background)
-	qdel(cam_background)
+	QDEL_NULL_LIST(cam_plane_masters)
 	last_camera_turf = null
 	concurrent_users = null
 	return ..()

code/game/machinery/computer/dropship_weapons.dm

@@ -33,6 +33,8 @@
 	var/camera_width = 11
 	var/camera_height = 11
 	var/camera_map_name
+	///Tracks equipment with a camera that is deployed and we are viewing
+	var/obj/structure/dropship_equipment/camera_area_equipment = null
 
 	var/registered = FALSE
 
@@ -62,17 +64,20 @@
 /obj/structure/machinery/computer/dropship_weapons/attack_hand(mob/user)
 	if(..())
 		return
-	if(!allowed(user))
 
+	if(!allowed(user))
+		// TODO: Restore cas simulator
+		to_chat(user, SPAN_WARNING("Weapons modification access denied."))
+		return TRUE
 		// everyone can access the simulator, requested feature.
-		to_chat(user, SPAN_WARNING("Weapons modification access denied, attempting to launch simulation."))
+		/*to_chat(user, SPAN_WARNING("Weapons modification access denied, attempting to launch simulation."))
 
 		if(!selected_firemission)
 			to_chat(user, SPAN_WARNING("Firemission must be selected before attempting to run the simulation"))
-			return
+			return TRUE
 
 		tgui_interact(user)
-		return 1
+		return FALSE*/
 
 	user.set_interaction(src)
 	ui_interact(user)
@@ -100,7 +105,7 @@
 
 /obj/structure/machinery/computer/dropship_weapons/ui_interact(mob/user, ui_key = "main", datum/nanoui/ui = null, force_open = 0)
 	var/obj/docking_port/mobile/marine_dropship/dropship = SSshuttle.getShuttle(shuttle_tag)
-	if (!istype(dropship))
+	if(!istype(dropship))
 		return
 
 	var/screen_mode = 0
@@ -129,22 +134,22 @@
 		if(screen_mode != 3 || !selected_firemission || dropship.mode != SHUTTLE_CALL)
 			update_location(user, null)
 
-	ui_data(user)
-	if(!tacmap.map_holder)
-		var/level = SSmapping.levels_by_trait(tacmap.targeted_ztrait)
-		tacmap.map_holder = SSminimaps.fetch_tacmap_datum(level[1], tacmap.allowed_flags)
-	user.client.register_map_obj(tacmap.map_holder.map)
 	tgui_interact(user)
 
 /obj/structure/machinery/computer/dropship_weapons/tgui_interact(mob/user, datum/tgui/ui)
 	if(!registered)
 		var/obj/docking_port/mobile/marine_dropship/dropship = SSshuttle.getShuttle(shuttle_tag)
 		RegisterSignal(dropship, COMSIG_DROPSHIP_ADD_EQUIPMENT, PROC_REF(equipment_update))
 		RegisterSignal(dropship, COMSIG_DROPSHIP_REMOVE_EQUIPMENT, PROC_REF(equipment_update))
-		registered=TRUE
+		registered = TRUE
+
+	if(!tacmap.map_holder)
+		var/level = SSmapping.levels_by_trait(tacmap.targeted_ztrait)
+		tacmap.map_holder = SSminimaps.fetch_tacmap_datum(level[1], tacmap.allowed_flags)
 
 	ui = SStgui.try_update_ui(user, src, ui)
-	if (!ui)
+	if(!ui)
+		user.client.register_map_obj(tacmap.map_holder.map)
 		SEND_SIGNAL(src, COMSIG_CAMERA_REGISTER_UI, user)
 		ui = new(user, src, "DropshipWeaponsConsole", "Weapons Console")
 		ui.open()
@@ -255,7 +260,7 @@
 	switch(action)
 		if("button_push")
 			playsound(src, get_sfx("terminal_button"), 25, FALSE)
-			return TRUE
+			return FALSE
 
 		if("select_equipment")
 			var/base_tag = params["equipment_id"]
@@ -303,12 +308,13 @@
 				var/mount_point = equipment.ship_base.attach_id
 				if(mount_point != equipment_tag)
 					continue
-				if (istype(equipment, /obj/structure/dropship_equipment/sentry_holder))
+				if(istype(equipment, /obj/structure/dropship_equipment/sentry_holder))
 					var/obj/structure/dropship_equipment/sentry_holder/sentry = equipment
 					var/obj/structure/machinery/defenses/sentry/defense = sentry.deployed_turret
-					if (defense.has_camera)
+					if(defense.has_camera)
 						defense.set_range()
 						var/datum/shape/rectangle/current_bb = defense.range_bounds
+						camera_area_equipment = sentry
 						SEND_SIGNAL(src, COMSIG_CAMERA_SET_AREA, current_bb.center_x, current_bb.center_y, defense.loc.z, current_bb.width, current_bb.height)
 				return TRUE
 
@@ -329,6 +335,7 @@
 					if(medevac.linked_stretcher)
 						SEND_SIGNAL(src, COMSIG_CAMERA_SET_TARGET, medevac.linked_stretcher, 5, 5)
 				return TRUE
+
 		if("fulton-target")
 			var/equipment_tag = params["equipment_id"]
 			for(var/obj/structure/dropship_equipment/equipment as anything in shuttle.equipments)
@@ -340,26 +347,31 @@
 					var/target_ref = params["ref"]
 					fulton.automate_interact(user, target_ref)
 				return TRUE
+
 		if("fire-weapon")
 			var/weapon_tag = params["eqp_tag"]
 			var/obj/structure/dropship_equipment/weapon/DEW = get_weapon(weapon_tag)
 			if(!DEW)
 				return FALSE
 
 			var/datum/cas_signal/sig = get_cas_signal(camera_target_id)
-
 			if(!sig)
 				return FALSE
 
 			selected_equipment = DEW
-			ui_open_fire(user, shuttle, camera_target_id)
+			if(ui_open_fire(user, shuttle, camera_target_id))
+				if(firemission_envelope)
+					firemission_envelope.untrack_object()
 			return TRUE
+
 		if("deploy-equipment")
 			var/equipment_tag = params["equipment_id"]
 			for(var/obj/structure/dropship_equipment/equipment as anything in shuttle.equipments)
 				var/mount_point = equipment.ship_base.attach_id
 				if(mount_point != equipment_tag)
 					continue
+				if(camera_area_equipment == equipment)
+					set_camera_target(null)
 				equipment.equipment_interact(user)
 				return TRUE
 
@@ -384,13 +396,8 @@
 			var/x_offset_value = params["x_offset_value"]
 			var/y_offset_value = params["y_offset_value"]
 
-			var/datum/cas_iff_group/cas_group = GLOB.cas_groups[faction]
-			var/datum/cas_signal/cas_sig
-			for(var/X in cas_group.cas_signals)
-				var/datum/cas_signal/LT = X
-				if(LT.target_id == target_id  && LT.valid_signal())
-					cas_sig = LT
-					break
+			camera_target_id = target_id
+			var/datum/cas_signal/cas_sig = get_cas_signal(camera_target_id, valid_only = TRUE)
 			// we don't want rapid offset changes to trigger admin warnings
 			// and block the user from accessing TGUI
 			// we change the minute_count
@@ -408,12 +415,14 @@
 				current.y + dy,
 				current.z)
 
-			firemission_envelope.change_current_loc(new_target)
-
+			camera_area_equipment = null
+			firemission_envelope.change_current_loc(new_target, cas_sig)
 			return TRUE
+
 		if("nvg-enable")
 			SEND_SIGNAL(src, COMSIG_CAMERA_SET_NVG, 5, "#7aff7a")
 			return TRUE
+
 		if("nvg-disable")
 			SEND_SIGNAL(src, COMSIG_CAMERA_CLEAR_NVG)
 			return TRUE
@@ -447,24 +456,28 @@
 
 /obj/structure/machinery/computer/dropship_weapons/proc/get_weapon(eqp_tag)
 	var/obj/docking_port/mobile/marine_dropship/dropship = SSshuttle.getShuttle(shuttle_tag)
-	for(var/obj/structure/dropship_equipment/equipment in dropship.equipments)
-		if(istype(equipment, /obj/structure/dropship_equipment/weapon))
-			//is weapon
-			if(selected_equipment == equipment)
-				return equipment
+	var/obj/structure/dropship_equipment/equipment = dropship.equipments[eqp_tag]
+	if(istype(equipment, /obj/structure/dropship_equipment/weapon))
+		//is weapon
+		return equipment
 	return
 
-/obj/structure/machinery/computer/dropship_weapons/proc/get_cas_signal(target_ref)
+/obj/structure/machinery/computer/dropship_weapons/proc/get_cas_signal(target_ref, valid_only = FALSE)
 	if(!target_ref)
 		return
 
 	var/datum/cas_iff_group/cas_group = GLOB.cas_groups[faction]
 	for(var/datum/cas_signal/sig in cas_group.cas_signals)
 		if(sig.target_id == target_ref)
+			if(valid_only && !sig.valid_signal())
+				continue
 			return sig
 
-
 /obj/structure/machinery/computer/dropship_weapons/proc/set_camera_target(target_ref)
+	camera_area_equipment = null
+	if(firemission_envelope)
+		firemission_envelope.untrack_object()
+
 	var/datum/cas_signal/target = get_cas_signal(target_ref)
 	camera_target_id = target_ref
 	if(!target)