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Cleanup scope functions

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centauri 2025-09-01 21:59:35 +01:00
parent 4b4db9602e
commit ce24f8ade9
4 changed files with 134 additions and 105 deletions
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81
src/indexes.luau
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@ -13,24 +13,26 @@ local function indexes<K, V, Obj>(
component: (Source<V>, K, Source<boolean>) -> (Obj, number?)
): Source<Array<Obj>>
local update_count = 0
local caches = {} :: Map<K, {
destroy_scope: () -> (),
present: (boolean?) -> boolean,
local scopes = {} :: Map<K, {
destroy: () -> (),
object: Obj,
value: V?,
value_source: (V?) -> V,
object: Obj,
delay: number,
timeout: { cancel: boolean }?,
count: number,
delay: number,
present: (boolean?) -> boolean,
timeout: { cancel: boolean }?,
}>
local output = source({} :: Array<Obj>)
local function update_output()
local array = table.create(#caches)
for _, cache in caches do
table.insert(array, cache.object)
local objects = table.create(4)
for _, scope in scopes do
table.insert(objects, scope.object)
end
output(array)
output(objects)
end
effect(function()
@ -41,11 +43,11 @@ local function indexes<K, V, Obj>(
local children_need_update = false -- set to true if a scope is created or destroyed
-- process data
-- create or update scopes
for i, v in data do
local cache = caches[i]
local scope = scopes[i]
if cache == nil then -- create new scope and create component
if scope == nil then -- create new scope and create component
local value_source = source(v)
local present = source(false)
@ -60,46 +62,47 @@ local function indexes<K, V, Obj>(
children_need_update = true
caches[i] = {
count = count,
scopes[i] = {
destroy = destroy,
object = object,
value = v,
destroy_scope = destroy,
value_source = value_source,
present = present,
count = count,
delay = delay or 0,
object = object
present = present,
timeout = nil,
}
else -- update source
cache.count = count
else -- update scope
scope.count = count
if cache.value ~= v then
if cache.timeout then
cache.timeout.cancel = true
cache.timeout = nil
cache.present(true)
if scope.value ~= v then
if scope.timeout then -- index is in input table again; cancel destruction
scope.timeout.cancel = true
scope.timeout = nil
scope.present(true)
end
cache.value = v
cache.value_source(v)
scope.value = v
scope.value_source(v)
end
end
end
-- remove old indexes
for i, cache in caches do
if cache.count < count then -- if count is not latest then value is no longer in the input table
cache.present(false)
-- destroy scopes
for i, scope in scopes do
if scope.count < count then -- if count is not latest then index is no longer in the input table
scope.present(false)
if cache.delay == 0 then
cache.destroy_scope()
caches[i] = nil
if scope.delay == 0 then
scope.destroy()
scopes[i] = nil
children_need_update = true
else
cache.value = nil
if cache.timeout == nil then
cache.timeout = timeout(cache.delay, function() -- todo: avoid redundant updates (e.g. indexes() input is cleared)
cache.destroy_scope()
caches[i] = nil
scope.value = nil -- set to nil for the `scope.value ~= v` check
if scope.timeout == nil then
scope.timeout = timeout(scope.delay, function() -- todo: possible redundant updates
scope.destroy()
scopes[i] = nil
update_output()
end)
end