[MIRROR] Reading a newspaper conceals your identity (#779)

* Reading a newspaper conceals your identity (#81276)

## About The Pull Request


![dreamseeker_T49SJcwCEf](https://github.com/tgstation/tgstation/assets/7483112/53fd391a-bf01-4dd3-9f58-6977b9b1d3f5)
While you are reading a newspaper with a free hand you will hold it up
in front of your face and ID, rendering you as "Unknown" to anyone who
examines you (although it does not conceal your voice).

If you don't have a free hand you can still read the paper but it won't
do these things.
I don't want to have to care about the balance of people hiding a gun
behind their newspaper, even if that is also pretty funny.

Inspired by a forum post:
https://tgstation13.org/phpBB/viewtopic.php?f=9&t=35650

## Why It's Good For The Game

I think that it's pretty funny.

## Changelog

:cl:
add: Reading a newspaper will conceal your identity.
/:cl:

* Reading a newspaper conceals your identity

---------

Co-authored-by: Jacquerel <[email protected]>

code/game/machinery/newscaster/newspaper.dm

@@ -37,6 +37,11 @@
 /obj/item/newspaper/Initialize(mapload)
 	. = ..()
 	register_context()
+	AddComponent(\
+		/datum/component/two_handed,\
+		wield_callback = CALLBACK(src, PROC_REF(on_wielded)),\
+		unwield_callback = CALLBACK(src, PROC_REF(on_unwielded)),\
+	)
 	creation_time = GLOB.news_network.last_action
 	for(var/datum/feed_channel/iterated_feed_channel in GLOB.news_network.network_channels)
 		news_content += iterated_feed_channel
@@ -105,11 +110,37 @@
 				return FALSE
 	return FALSE
 
+/// Called when you start reading the paper with both hands
+/obj/item/newspaper/proc/on_wielded(obj/item/source, mob/user)
+	RegisterSignal(user, COMSIG_ATOM_UPDATE_OVERLAYS, PROC_REF(holder_updated_overlays))
+	RegisterSignal(user, COMSIG_HUMAN_GET_VISIBLE_NAME, PROC_REF(holder_checked_name))
+	user.update_appearance(UPDATE_OVERLAYS)
+	user.name = user.get_visible_name()
+
+/// Called when you stop doing that
+/obj/item/newspaper/proc/on_unwielded(obj/item/source, mob/user)
+	UnregisterSignal(user, list(COMSIG_ATOM_UPDATE_OVERLAYS, COMSIG_HUMAN_GET_VISIBLE_NAME))
+	user.update_appearance(UPDATE_OVERLAYS)
+	user.name = user.get_visible_name()
+
+/// Called when we're being read and overlays are updated, we should show a big newspaper over the reader
+/obj/item/newspaper/proc/holder_updated_overlays(atom/reader, list/overlays)
+	SIGNAL_HANDLER
+	overlays += mutable_appearance(icon, "newspaper_held_over", ABOVE_MOB_LAYER)
+	overlays += mutable_appearance(icon, "newspaper_held_under", BELOW_MOB_LAYER)
+
+/// Called when someone tries to figure out what our identity is, but they can't see it because of the newspaper
+/obj/item/newspaper/proc/holder_checked_name(mob/living/carbon/human/source, list/identity)
+	SIGNAL_HANDLER
+	identity[VISIBLE_NAME_FACE] = ""
+	identity[VISIBLE_NAME_ID] = ""
+
 /obj/item/newspaper/ui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)
-	if(!ui)
-		ui = new(user, src, "Newspaper", name)
-		ui.open()
+	if(ui)
+		return
+	ui = new(user, src, "Newspaper", name)
+	ui.open()
 
 /obj/item/newspaper/ui_act(action, list/params, datum/tgui/ui, datum/ui_state/state)
 	. = ..()