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Bubberstation/code/datums/components/hat_stabilizer.dm
SmArtKar 38756bfbd7 Fixes hat stabilizer overlays rendering behind hats (#90407) 
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## About The Pull Request

Because we didn't pass layer into sub-overlays they ended up layering
ontop of other sub-overlays. This didn't break main layering because
BYOND's overlay rendering is actually acting like an ordered tree when
layered overlays are concerned, and blood decals (other user of separate
overlays) also used FLOAT_LAYER (-1).

And hat stabilizers also just assigned an absolute value to theirs,
which also made them not work properly.

Closes #90388

## Changelog

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🆑
fix: Fixed hat stabilizer overlays rendering behind hats
/🆑

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2025-04-29 17:15:01 -06:00

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/// Allows players to place hats on the atom this is attached to
/datum/component/hat_stabilizer
dupe_mode = COMPONENT_DUPE_UNIQUE_PASSARGS
/// Currently "stored" hat. No armor or function will be inherited, only the icon and cover flags.
var/obj/item/clothing/head/attached_hat
/// If TRUE, the hat will fall to the ground when the owner does so. It can also be shot off.
var/loose_hat = FALSE
/// Original cover flags for the helmet, before a hat is placed
var/former_flags
var/former_visor_flags
/// If true, add_overlay will use worn overlay instead of item appearance
var/use_worn_icon = TRUE
/// Pixel z offset for the hat
var/pixel_z_offset
/datum/component/hat_stabilizer/Initialize(use_worn_icon = FALSE, pixel_z_offset = 0, loose_hat = FALSE)
if(!ismovable(parent))
return COMPONENT_INCOMPATIBLE
var/atom/movable/source = parent
source.flags_1 |= HAS_CONTEXTUAL_SCREENTIPS_1
src.use_worn_icon = use_worn_icon
src.pixel_z_offset = pixel_z_offset
src.loose_hat = loose_hat
// Examine signals
RegisterSignal(source, COMSIG_ATOM_EXAMINE, PROC_REF(on_examine))
RegisterSignal(source, COMSIG_ATOM_REQUESTING_CONTEXT_FROM_ITEM, PROC_REF(on_requesting_context_from_item))
// Equip signals, used to drop loose hats
RegisterSignal(source, COMSIG_ITEM_EQUIPPED, PROC_REF(on_equip))
RegisterSignal(source, COMSIG_ITEM_DROPPED, PROC_REF(on_drop))
// Wear & Remove
RegisterSignal(source, COMSIG_ATOM_ATTACKBY, PROC_REF(on_attackby))
RegisterSignal(source, COMSIG_ATOM_ATTACK_HAND_SECONDARY, PROC_REF(on_secondary_attack_hand))
// Overlays
RegisterSignal(source, COMSIG_MODULE_GENERATE_WORN_OVERLAY, PROC_REF(get_worn_overlays))
RegisterSignal(source, COMSIG_ITEM_GET_SEPARATE_WORN_OVERLAYS, PROC_REF(get_separate_worn_overlays))
RegisterSignal(source, COMSIG_QDELETING, PROC_REF(on_qdel))
// Inherit the new values passed to the component
/datum/component/hat_stabilizer/InheritComponent(datum/component/hat_stabilizer/new_comp, original, use_worn_icon, pixel_z_offset, loose_hat)
if(!original)
return
if(!isnull(use_worn_icon))
src.use_worn_icon = use_worn_icon
if(!isnull(use_worn_icon))
src.use_worn_icon = use_worn_icon
if(!isnull(pixel_z_offset))
src.pixel_z_offset = pixel_z_offset
if(!isnull(loose_hat))
src.loose_hat = loose_hat
/datum/component/hat_stabilizer/UnregisterFromParent()
if (attached_hat)
remove_hat()
UnregisterSignal(parent, list(COMSIG_ATOM_EXAMINE, COMSIG_ATOM_ATTACKBY,
COMSIG_ATOM_ATTACK_HAND_SECONDARY, COMSIG_MODULE_GENERATE_WORN_OVERLAY,
COMSIG_ITEM_GET_SEPARATE_WORN_OVERLAYS, COMSIG_ATOM_UPDATE_OVERLAYS, COMSIG_QDELETING,
COMSIG_ATOM_REQUESTING_CONTEXT_FROM_ITEM, COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED))
/datum/component/hat_stabilizer/proc/on_equip(datum/source, mob/equipper, slot)
SIGNAL_HANDLER
if(!loose_hat)
return
var/obj/item/our_item = parent
if(!(slot & our_item.slot_flags))
return
RegisterSignals(equipper, list(COMSIG_MOB_SLIPPED, COMSIG_LIVING_SLAPPED, COMSIG_MOVABLE_POST_THROW), PROC_REF(throw_hat))
RegisterSignal(equipper, COMSIG_LIVING_THUD, PROC_REF(drop_hat))
/datum/component/hat_stabilizer/proc/on_drop(datum/source, mob/dropper)
SIGNAL_HANDLER
UnregisterSignal(dropper, list(COMSIG_MOB_SLIPPED, COMSIG_LIVING_SLAPPED, COMSIG_MOVABLE_POST_THROW, COMSIG_LIVING_THUD))
/datum/component/hat_stabilizer/proc/throw_hat(mob/hatless)
SIGNAL_HANDLER
if(!loose_hat)
return
var/obj/item/hat = remove_hat()
if(!hat)
return
hat.visible_message(span_danger("[hat] goes flying off [hatless]'s head!"))
hat.throw_at(get_edge_target_turf(get_turf(hat), pick(GLOB.alldirs)), 2, 1, spin = TRUE)
/datum/component/hat_stabilizer/proc/drop_hat(mob/hatless)
SIGNAL_HANDLER
if(!loose_hat)
return
remove_hat()
/datum/component/hat_stabilizer/proc/on_examine(datum/source, mob/user, list/base_examine)
SIGNAL_HANDLER
if(attached_hat)
base_examine += span_notice("There's \a [attached_hat] [loose_hat ? "loosely" : ""] placed on [parent].")
else
base_examine += span_notice("There's nothing placed on [parent]. Yet.")
/datum/component/hat_stabilizer/proc/get_worn_overlays(atom/movable/source, list/overlays, mutable_appearance/standing, isinhands, icon_file)
SIGNAL_HANDLER
if(isinhands)
return
if(!attached_hat)
return
var/mutable_appearance/worn_overlay = attached_hat.build_worn_icon(default_layer = ABOVE_BODY_FRONT_HEAD_LAYER - 0.1, default_icon_file = 'icons/mob/clothing/head/default.dmi')
worn_overlay.appearance_flags |= RESET_COLOR
// loose hats are slightly angled
if(loose_hat)
var/matrix/tilt_trix = matrix(worn_overlay.transform)
var/angle = 5
tilt_trix.Turn(angle * pick(1, -1))
worn_overlay.transform = tilt_trix
worn_overlay.pixel_z = pixel_z_offset + attached_hat.worn_y_offset
overlays += worn_overlay
/datum/component/hat_stabilizer/proc/get_separate_worn_overlays(atom/movable/source, list/overlays, mutable_appearance/standing, mutable_appearance/draw_target, isinhands, icon_file)
SIGNAL_HANDLER
if (isinhands)
return
if(!attached_hat)
return
var/mutable_appearance/worn_overlay = attached_hat.build_worn_icon(default_layer = ABOVE_BODY_FRONT_HEAD_LAYER - 0.1, default_icon_file = 'icons/mob/clothing/head/default.dmi')
for (var/mutable_appearance/overlay in worn_overlay.overlays)
overlay.layer = -ABOVE_BODY_FRONT_HEAD_LAYER + 0.1
// loose hats are slightly angled
if(loose_hat)
var/matrix/tilt_trix = matrix(worn_overlay.transform)
var/angle = 5
tilt_trix.Turn(angle * pick(1, -1))
worn_overlay.transform = tilt_trix
worn_overlay.pixel_z = pixel_z_offset + attached_hat.worn_y_offset
overlays += worn_overlay
/datum/component/hat_stabilizer/proc/on_qdel(atom/movable/source)
SIGNAL_HANDLER
if (attached_hat)
QDEL_NULL(attached_hat)
/datum/component/hat_stabilizer/proc/on_attackby(datum/source, obj/item/hitting_item, mob/user)
SIGNAL_HANDLER
var/atom/movable/movable_parent = parent
if(!istype(hitting_item, /obj/item/clothing/head))
return
if(attached_hat)
movable_parent.balloon_alert(user, "hat already attached!")
return
var/obj/item/clothing/hat = hitting_item
if(hat.clothing_flags & STACKABLE_HELMET_EXEMPT)
movable_parent.balloon_alert(user, "invalid hat!")
return
if(!user.transferItemToLoc(hat, parent, force = FALSE, silent = TRUE))
return
attach_hat(hat, user)
/datum/component/hat_stabilizer/proc/attach_hat(obj/item/clothing/hat, mob/user)
var/atom/movable/movable_parent = parent
attached_hat = hat
RegisterSignal(hat, COMSIG_MOVABLE_MOVED, PROC_REF(on_hat_movement))
if (!isnull(user))
movable_parent.balloon_alert(user, "hat attached")
if (!istype(parent, /obj/item/clothing))
movable_parent.update_appearance()
return
var/obj/item/clothing/apparel = parent
apparel.attach_clothing_traits(attached_hat.clothing_traits)
former_flags = apparel.flags_cover
former_visor_flags = apparel.visor_flags_cover
apparel.flags_cover |= attached_hat.flags_cover
apparel.visor_flags_cover |= attached_hat.visor_flags_cover
apparel.update_appearance()
if (ismob(apparel.loc))
var/mob/wearer = apparel.loc
wearer.update_clothing(wearer.get_slot_by_item(apparel))
/datum/component/hat_stabilizer/proc/on_hat_movement(obj/hat, mob/user)
SIGNAL_HANDLER
remove_hat(user)
/datum/component/hat_stabilizer/proc/on_secondary_attack_hand(datum/source, mob/user)
SIGNAL_HANDLER
. = COMPONENT_CANCEL_ATTACK_CHAIN
if(!attached_hat)
return
var/atom/movable/movable_parent = parent
if (remove_hat(user))
movable_parent.balloon_alert(user, "hat removed")
else
movable_parent.balloon_alert_to_viewers("the hat falls to the floor!")
/datum/component/hat_stabilizer/proc/on_retraction()
/datum/component/hat_stabilizer/proc/remove_hat(mob/user)
if(QDELETED(attached_hat))
return
var/atom/movable/movable_parent = parent
UnregisterSignal(attached_hat, COMSIG_MOVABLE_MOVED)
if (attached_hat.loc == parent)
attached_hat.forceMove(movable_parent.drop_location())
if(!isnull(user))
. = user.put_in_active_hand(attached_hat)
else
movable_parent.balloon_alert_to_viewers("the hat falls to the floor!")
if (!istype(parent, /obj/item/clothing))
attached_hat = null
movable_parent.update_appearance()
return
var/former_hat = attached_hat
var/obj/item/clothing/apparel = parent
apparel.detach_clothing_traits(attached_hat.clothing_traits)
apparel.flags_cover = former_flags
apparel.visor_flags_cover = former_visor_flags
apparel.update_appearance()
attached_hat = null
if (ismob(apparel.loc))
var/mob/wearer = apparel.loc
wearer.update_clothing(wearer.get_slot_by_item(apparel))
return former_hat
/datum/component/hat_stabilizer/proc/on_requesting_context_from_item(atom/source, list/context, obj/item/held_item, mob/user)
SIGNAL_HANDLER
if(attached_hat && !held_item)
context[SCREENTIP_CONTEXT_RMB] = "Remove hat"
return CONTEXTUAL_SCREENTIP_SET
if(istype(held_item, /obj/item/clothing/head))
context[SCREENTIP_CONTEXT_LMB] = "Attach hat"
return CONTEXTUAL_SCREENTIP_SET
return NONE
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