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aaron 2023-08-06 23:16:58 +01:00
parent e03082c941
commit fa2709f182
8 changed files with 367 additions and 216 deletions
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26
src/bind.luau
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@ -88,32 +88,32 @@ local function bind_parent(instance: Instance, fn: () -> Instance?)
end
local function bind_children(parent: Instance, fn: () -> { Instance })
local currentChildrenSet: { [Instance]: true } = {} -- cache of all children parented before update
local newChildrenSet: { [Instance]: true } = {} -- cache of all children parented after update
local current_child_set: { [Instance]: true } = {} -- cache of all children parented before update
local new_child_set: { [Instance]: true } = {} -- cache of all children parented after update
setup(parent, function(parent_weak)
local newChildren = fn() -- all (and only) children that should be parented after this update
if newChildren and type(newChildren) ~= "table" then
throw(`Cannot parent instance of type { type(newChildren) } `)
local new_childs = fn() -- all (and only) children that should be parented after this update
if new_childs and type(new_childs) ~= "table" then
throw(`Cannot parent instance of type { type(new_childs) } `)
end
if newChildren then
for _, child in next, newChildren do
newChildrenSet[child] = true -- record child set from this update
if not currentChildrenSet[child] then
if new_childs then
for _, child in next, new_childs do
new_child_set[child] = true -- record child set from this update
if not current_child_set[child] then
child.Parent = parent_weak -- if child wasn't already parented then parent it
else
currentChildrenSet[child] = nil -- remove child from cache if it was already in cache
current_child_set[child] = nil -- remove child from cache if it was already in cache
end
end
end
for child in next, currentChildrenSet do
for child in next, current_child_set do
child.Parent = nil -- unparent all children that weren't in the new children set
end
table.clear(currentChildrenSet) -- clear cache, preserve capacity
currentChildrenSet, newChildrenSet = newChildrenSet, currentChildrenSet
table.clear(current_child_set) -- clear cache, preserve capacity
current_child_set, new_child_set = new_child_set, current_child_set
end)
end