51 lines
1.3 KiB
GDScript3
51 lines
1.3 KiB
GDScript3
|
extends RdotNode
|
||
|
|
class_name RdotState
|
||
|
|
|
||
|
|
var equal: Callable = func(this, a, b): a == b
|
||
|
|
var value: Variant = null
|
||
|
|
|
||
|
|
static func createSignal(initialValue: Variant):
|
||
|
|
var node = RdotState.new()
|
||
|
|
node.value = initialValue
|
||
|
|
|
||
|
|
var getter = func():
|
||
|
|
RdotGraph.getInstance().producerAccessed(node)
|
||
|
|
return node.value
|
||
|
|
|
||
|
|
return [getter, node]
|
||
|
|
|
||
|
|
static func setPostSignalSetFn(fn: Callable) -> Callable:
|
||
|
|
var graph := RdotGraph.getInstance()
|
||
|
|
var prev = graph.postSignalSetFn
|
||
|
|
graph.postSignalSetFn = fn
|
||
|
|
return prev
|
||
|
|
|
||
|
|
static func signalGetFn(this: RdotState):
|
||
|
|
RdotGraph.getInstance().producerAccessed(this)
|
||
|
|
return this.value
|
||
|
|
|
||
|
|
static func signalSetFn(node: RdotState, newValue: Variant):
|
||
|
|
var graph := RdotGraph.getInstance()
|
||
|
|
|
||
|
|
assert(graph.producerUpdatesAllowed())
|
||
|
|
|
||
|
|
if !node.equal.call(node.wrapper, node.value, newValue):
|
||
|
|
node.value = newValue
|
||
|
|
signalValueChanged(node)
|
||
|
|
|
||
|
|
static func signalUpdateFn(node: RdotState, updater: Callable):
|
||
|
|
var graph := RdotGraph.getInstance()
|
||
|
|
|
||
|
|
assert(graph.producerUpdatesAllowed())
|
||
|
|
|
||
|
|
signalSetFn(node, updater.call(node.value))
|
||
|
|
|
||
|
|
static func signalValueChanged(node: RdotState):
|
||
|
|
var graph := RdotGraph.getInstance()
|
||
|
|
|
||
|
|
node.version += 1
|
||
|
|
graph.producerIncrementEpoch()
|
||
|
|
graph.producerNotifyConsumers(node)
|
||
|
|
if !graph.postSignalSetFn.is_null():
|
||
|
|
graph.postSignalSetFn.call()
|