Hardsuit Helmets can now be used as internals masks. Rejoice, CE mains.

Also reworks internals code a little to be much more friendly. Any head or mask item with the flag should now function as an internals mask if it has the ALLOWSINTERNALS flag.

code/modules/clothing/chameleon.dm

@@ -437,7 +437,7 @@
 	item_state = "gas_alt"
 	resistance_flags = NONE
 	armor = list("melee" = 5, "bullet" = 5, "laser" = 5, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 50)
-	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | ALLOWINTERNALS
 	flags_inv = HIDEEARS|HIDEEYES|HIDEFACE|HIDEFACIALHAIR
 	gas_transfer_coefficient = 0.01
 	permeability_coefficient = 0.01

code/modules/clothing/masks/breath.dm

@@ -4,8 +4,8 @@
 	icon_state = "breath"
 	item_state = "m_mask"
 	body_parts_covered = 0
-	clothing_flags = MASKINTERNALS
-	visor_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
+	visor_flags = ALLOWINTERNALS
 	w_class = WEIGHT_CLASS_SMALL
 	gas_transfer_coefficient = 0.1
 	permeability_coefficient = 0.5

code/modules/clothing/masks/gasmask.dm

@@ -2,7 +2,7 @@
 	name = "gas mask"
 	desc = "A face-covering mask that can be connected to an air supply. While good for concealing your identity, it isn't good for blocking gas flow." //More accurate
 	icon_state = "gas_alt"
-	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | ALLOWINTERNALS
 	flags_inv = HIDEEARS|HIDEEYES|HIDEFACE|HIDEFACIALHAIR|HIDESNOUT
 	w_class = WEIGHT_CLASS_NORMAL
 	item_state = "gas_alt"
@@ -59,7 +59,7 @@
 /obj/item/clothing/mask/gas/clown_hat
 	name = "clown wig and mask"
 	desc = "A true prankster's facial attire. A clown is incomplete without his wig and mask."
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	icon_state = "clown"
 	item_state = "clown_hat"
 	flags_cover = MASKCOVERSEYES
@@ -91,7 +91,7 @@
 /obj/item/clothing/mask/gas/sexyclown
 	name = "sexy-clown wig and mask"
 	desc = "A feminine clown mask for the dabbling crossdressers or female entertainers."
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	icon_state = "sexyclown"
 	item_state = "sexyclown"
 	flags_cover = MASKCOVERSEYES
@@ -100,7 +100,7 @@
 /obj/item/clothing/mask/gas/mime
 	name = "mime mask"
 	desc = "The traditional mime's mask. It has an eerie facial posture."
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	icon_state = "mime"
 	item_state = "mime"
 	flags_cover = MASKCOVERSEYES
@@ -132,7 +132,7 @@
 /obj/item/clothing/mask/gas/monkeymask
 	name = "monkey mask"
 	desc = "A mask used when acting as a monkey."
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	icon_state = "monkeymask"
 	item_state = "monkeymask"
 	flags_cover = MASKCOVERSEYES
@@ -141,7 +141,7 @@
 /obj/item/clothing/mask/gas/sexymime
 	name = "sexy mime mask"
 	desc = "A traditional female mime's mask."
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	icon_state = "sexymime"
 	item_state = "sexymime"
 	flags_cover = MASKCOVERSEYES
@@ -162,7 +162,7 @@
 	name = "owl mask"
 	desc = "Twoooo!"
 	icon_state = "owl"
-	clothing_flags = MASKINTERNALS
+	clothing_flags = ALLOWINTERNALS
 	flags_cover = MASKCOVERSEYES
 	resistance_flags = FLAMMABLE
 

code/modules/clothing/masks/hailer.dm

@@ -7,10 +7,10 @@
 	actions_types = list(/datum/action/item_action/halt, /datum/action/item_action/adjust)
 	icon_state = "sechailer"
 	item_state = "sechailer"
-	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	clothing_flags = BLOCK_GAS_SMOKE_EFFECT | ALLOWINTERNALS
 	flags_inv = HIDEFACIALHAIR|HIDEFACE
 	w_class = WEIGHT_CLASS_SMALL
-	visor_flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	visor_flags = BLOCK_GAS_SMOKE_EFFECT | ALLOWINTERNALS
 	visor_flags_inv = HIDEFACE
 	flags_cover = MASKCOVERSMOUTH
 	visor_flags_cover = MASKCOVERSMOUTH

code/modules/clothing/spacesuits/_spacesuits.dm

@@ -4,7 +4,7 @@
 	name = "space helmet"
 	icon_state = "spaceold"
 	desc = "A special helmet with solar UV shielding to protect your eyes from harmful rays."
-	clothing_flags = STOPSPRESSUREDAMAGE | THICKMATERIAL
+	clothing_flags = STOPSPRESSUREDAMAGE | THICKMATERIAL | BLOCK_GAS_SMOKE_EFFECT | ALLOWINTERNALS
 	item_state = "spaceold"
 	permeability_coefficient = 0.01
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0,"energy" = 0, "bomb" = 0, "bio" = 100, "rad" = 50, "fire" = 80, "acid" = 70)