Add BodyAccessor.makeBody logic

OpenSwiftUIProject · Feb 25, 2024 · d1c1da5 · d1c1da5
1 parent 4b0bb2a
commit d1c1da5
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Showing 4 changed files with 82 additions and 8 deletions.
diff --git a/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicProperty.swift b/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicProperty.swift
@@ -76,7 +76,7 @@ extension DynamicProperty {
         container: _GraphValue<Value>,
         fieldOffset: Int,
         inputs: inout _GraphInputs
-    ) -> () {
+    ) {
         let fields = DynamicPropertyCache.fields(of: self)
         buffer.addFields(
             fields,
@@ -88,14 +88,45 @@ extension DynamicProperty {
 }
 
 extension BodyAccessor {
-    func makeBody(container: _GraphValue<Container>, inputs: inout _GraphInputs, fields: DynamicPropertyCache.Fields) -> (_GraphValue<Body>, _DynamicPropertyBuffer?) {
+    func makeBody(
+        container: _GraphValue<Container>,
+        inputs: inout _GraphInputs,
+        fields: DynamicPropertyCache.Fields
+    ) -> (_GraphValue<Body>, _DynamicPropertyBuffer?) {
         guard Body.self != Never.self else {
             fatalError("\(Body.self) may not have Body == Never")
         }
-        withUnsafeMutablePointer(to: &inputs) { inputs in
-            // TODO
+        return withUnsafeMutablePointer(to: &inputs) { inputsPointer in
+            func project<Flags: RuleThreadFlags>(flags _: Flags.Type) -> (_GraphValue<Body>, _DynamicPropertyBuffer?) {
+                let buffer = _DynamicPropertyBuffer(
+                    fields: fields,
+                    container: container,
+                    inputs: &inputsPointer.pointee
+                )
+                if buffer._count == 0 {
+                    buffer.destroy()
+                    let body = StaticBody<Self, Flags>(
+                        accessor: self,
+                        container: container.value
+                    )
+                    return (_GraphValue(body), nil)
+                } else {
+                    let body = DynamicBody<Self, Flags>(
+                        accessor: self,
+                        container: container.value,
+                        phase: inputsPointer.pointee.phase,
+                        links: buffer,
+                        resetSeed: 0
+                    )
+                    return (_GraphValue(body), buffer)
+                }
+            }
+            if fields.behaviors.contains(.asyncThread) {
+                return project(flags: AsyncThreadFlags.self)
+            } else {
+                return project(flags: MainThreadFlags.self)
+            }
         }
-        fatalError("TODO")
     }
 }
 
@@ -167,3 +198,39 @@ extension StaticBody: BodyAccessorRule {
 extension StaticBody: CustomStringConvertible {
     var description: String { "\(Accessor.Body.self)" }
 }
+
+// MARK: - DynamicBody
+
+// TODO
+private struct DynamicBody<Accessor: BodyAccessor, ThreadFlags: RuleThreadFlags> {
+    let accessor: Accessor
+    @Attribute
+    var container: Accessor.Container
+    @Attribute
+    var phase: _GraphInputs.Phase
+    var links: _DynamicPropertyBuffer
+    var resetSeed: UInt32
+
+    init(
+        accessor: Accessor,
+        container: Attribute<Accessor.Container>,
+        phase: Attribute<_GraphInputs.Phase>,
+        links: _DynamicPropertyBuffer,
+        resetSeed: UInt32
+    ) {
+        fatalError("TODO")
+//        self.accessor = accessor
+//        self._container = container
+//        self._phase = phase
+//        self.links = links
+//        self.resetSeed = resetSeed
+    }
+}
+
+extension DynamicBody: StatefulRule {
+    typealias Value = Accessor.Body
+
+    func updateValue() {
+        // TODO
+    }
+}
diff --git a/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicPropertyBehaviors.swift b/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicPropertyBehaviors.swift
@@ -8,4 +8,5 @@
 
 struct DynamicPropertyBehaviors: OptionSet {
     let rawValue: UInt32
+    static var asyncThread: DynamicPropertyBehaviors { .init(rawValue: 1 << 0) }
 }
diff --git a/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicPropertyBuffer.swift b/Sources/OpenSwiftUI/DataAndStorage/ModelData/DynamicProperty/DynamicPropertyBuffer.swift
@@ -26,7 +26,7 @@ public struct _DynamicPropertyBuffer {
         fields: DynamicPropertyCache.Fields,
         container: _GraphValue<Value>,
         inputs: inout _GraphInputs,
-        baseOffset: Int
+        baseOffset: Int = 0
     ) {
         self.init()
         addFields(fields, container: container, inputs: &inputs, baseOffset: baseOffset)

diff --git a/Sources/OpenSwiftUI/Internal/Graph/GraphValue.swift b/Sources/OpenSwiftUI/Internal/Graph/GraphValue.swift
@@ -22,8 +22,14 @@ public struct _GraphValue<Value>: Equatable {
     init(_ value: Attribute<Value>) {
         self.value = value
     }
-//    init(_ value: Rule)
-//    init(_ value: StatefulRule)
+
+    init<R: Rule>(_ rule: R) where R.Value == Value {
+        fatalError("TODO")
+    }
+
+    init<R: StatefulRule>(_ rule: R) where R.Value == Value {
+        fatalError("TODO")
+    }
 
     subscript<Member>(offset body: (inout Value) -> PointerOffset<Value, Member>) -> _GraphValue<Member> {
         .init(value[offset: body])