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This commit is contained in:
Aaron Smith 2023-07-31 16:24:50 +01:00
parent 96e577a626
commit bf1b1978d9
8 changed files with 279 additions and 226 deletions
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13
src/bind.lua
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@ -47,7 +47,7 @@ local function traceback() -- ensures trace begins outside of any vide library f
return debug.traceback("", s)
end
function setup(instance: Instance, deriver: () -> unknown, setter: (Instance) -> ())
function setup(instance: Instance, setter: (Instance) -> ())
if flags.strict then
local fn = setter
local trace = traceback()
@ -70,7 +70,8 @@ function setup(instance: Instance, deriver: () -> unknown, setter: (Instance) ->
weak[key] = instance
local function ref()
local _ = nodes -- prevent gc of state while instance exists
--todo:local _ = nodes -- prevent gc of state while instance exists
local _ = setter
local instance = weak[key] :: Instance
hold[key] = instance.Parent and instance or nil -- prevent gc of instance while parented
end
@ -79,8 +80,10 @@ function setup(instance: Instance, deriver: () -> unknown, setter: (Instance) ->
instance:GetPropertyChangedSignal("Parent"):Connect(ref)
end
-- todo: move `fn` as arg?
local function bind_property(instance: Instance, property: string, fn: () -> unknown)
setup(instance, fn, function(instance_weak: any)
setup(instance, function(instance_weak: any)
instance_weak[property] = fn()
end)
end
@ -89,7 +92,7 @@ local function bind_parent(instance: Instance, fn: () -> Instance?)
instance.Destroying:Connect(function()
instance= nil :: any -- allow gc when destroyed
end)
setup(instance, fn, function(instance)
setup(instance, function(instance)
local _ = instance -- state will strongly reference instance when parent is bound
instance.Parent = fn()
end)
@ -99,7 +102,7 @@ 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
setup(parent, fn, function(parent_weak)
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) } `)