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https://github.com/Bubberstation/Bubberstation.git
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JacquerelandGitHub
0d769e0ffa
## About The Pull Request
We're starting to get to have enough components that people don't
realise that what they want already exists but doesn't have the name
they expect 🙃
I recently added `track_hierarchical_movement` which is similar enough
to `connect_containers` that it shouldn't independently exist, even if I
like sending a new signal more than the ugly setup pattern for
`connect_loc`.
`trait_loc` is actually older than `give_turf_traits` but
`give_turf_traits` covers more edge cases than `turf_loc` so seems like
the better one to maintain.
HOWEVER `give_turf_traits` held a list of references to atoms in it,
which isn't great in an element. I couldn't think of a way to completely
eliminate the list, but it isn't a list of references any more so it
shouldn't cause any hard deletions.
## Why It's Good For The Game
Having two components which do the same thing but marginally differently
is confusing and going to cause us trouble down the line.
## Changelog
Not player facing
80 lines
3.2 KiB
Plaintext
80 lines
3.2 KiB
Plaintext
/// A bespoke element that adds a set of traits to the turf while occupied by at least one attached movabled.
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/datum/element/give_turf_traits
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element_flags = ELEMENT_DETACH_ON_HOST_DESTROY|ELEMENT_BESPOKE
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argument_hash_start_idx = 2
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///A list of traits that are added to the turf while occupied.
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var/list/traits
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///List of sources we are using to reapply traits when turf changes
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var/list/trait_sources = list()
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/datum/element/give_turf_traits/Attach(atom/movable/target, list/traits)
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. = ..()
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if(!istype(target))
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return ELEMENT_INCOMPATIBLE
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src.traits = traits
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RegisterSignal(target, COMSIG_MOVABLE_MOVED, PROC_REF(on_moved))
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if(isturf(target.loc))
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add_to_occupied_turfs(target.loc, target)
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/datum/element/give_turf_traits/Detach(atom/movable/source)
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UnregisterSignal(source, COMSIG_MOVABLE_MOVED)
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if(isturf(source.loc))
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remove_from_occupied_turfs(source.loc, source)
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return ..()
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/// Removes the trait from the old turf and adds it to the new one.
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/datum/element/give_turf_traits/proc/on_moved(atom/movable/source, atom/old_loc)
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SIGNAL_HANDLER
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if(isturf(old_loc))
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remove_from_occupied_turfs(old_loc, source)
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if(isturf(source.loc))
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add_to_occupied_turfs(source.loc, source)
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/**
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* Registers the turf signals if it was previously unoccupied and adds it to the list of occupied turfs.
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* Otherwise, it just adds the movable to the assoc value of lists occupying the turf.
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*/
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/datum/element/give_turf_traits/proc/add_to_occupied_turfs(turf/location, atom/movable/source)
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var/trait_source = REF(source)
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if(isnull(trait_sources) || isnull(trait_sources[location]))
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RegisterSignal(location, COMSIG_TURF_CHANGE, PROC_REF(pre_change_turf))
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LAZYADDASSOCLIST(trait_sources, location, trait_source)
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var/update_movespeeds = (TRAIT_TURF_IGNORE_SLOWDOWN in traits) && !HAS_TRAIT(location, TRAIT_TURF_IGNORE_SLOWDOWN)
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for(var/trait in traits)
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ADD_TRAIT(location, trait, trait_source)
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if(update_movespeeds)
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for(var/mob/living/living in location)
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living.update_turf_movespeed()
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/**
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* Unregisters the turf signals if it's no longer unoccupied and removes it from the list of occupied turfs.
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* Otherwise, it just removes the movable from the assoc value of lists occupying the turf.
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*/
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/datum/element/give_turf_traits/proc/remove_from_occupied_turfs(turf/location, atom/movable/source)
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var/trait_source = REF(source)
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LAZYREMOVEASSOC(trait_sources, location, trait_source)
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if(isnull(trait_sources) || isnull(trait_sources[location]))
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UnregisterSignal(location, COMSIG_TURF_CHANGE)
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for(var/trait in traits)
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REMOVE_TRAIT(location, trait, trait_source)
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if((TRAIT_TURF_IGNORE_SLOWDOWN in traits) && !HAS_TRAIT(location, TRAIT_TURF_IGNORE_SLOWDOWN))
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for(var/mob/living/living in location)
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living.update_turf_movespeed()
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/// Signals and components are carried over when the turf is changed, so they've to be readded post-change.
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/datum/element/give_turf_traits/proc/pre_change_turf(turf/changed, path, list/new_baseturfs, flags, list/post_change_callbacks)
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SIGNAL_HANDLER
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post_change_callbacks += CALLBACK(src, PROC_REF(reoccupy_turf))
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/// Reapply turf traits to the provided turf
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/datum/element/give_turf_traits/proc/reoccupy_turf(turf/changed)
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for(var/trait in traits)
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for(var/source in trait_sources[changed])
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ADD_TRAIT(changed, trait, source)
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