ARK-OS/arkos/arkrt/ark.ui.basic/Sources/Views/TupleView.swift.gyb

// This file was generated using gyb. Do not edit it directly. Edit
// TupleView.swift.gyb instead.

// swiftformat:options --allow-partial-wrapping true
%{
maximum_view_count = 20
}%

@MainActor
private func layoutableChild<V: View>(
    node: AnyViewGraphNode<V>,
    view: V
) -> LayoutSystem.LayoutableChild {
    LayoutSystem.LayoutableChild(
        computeLayout: { proposedSize, environment in
            node.computeLayout(
                with: view,
                proposedSize: proposedSize,
                environment: environment
            )
        },
        commit: {
            node.commit()
        },
        tag: "\(type(of: view))"
    )
}

/// Just a vessel for some default implementations to compress this generated code.
@MainActor
protocol TupleView: TypeSafeView {}

extension TupleView {
    @MainActor
    func asWidget<Backend: BaseAppBackend>(
        _ children: Children,
        backend: Backend
    ) -> Backend.Widget {
        let group = Group(content: self)
        return group.asWidget(children, backend: backend)
    }

    @MainActor
    func computeLayout<Backend: BaseAppBackend>(
        _ widget: Backend.Widget,
        children: Children,
        proposedSize: ProposedViewSize,
        environment: EnvironmentValues,
        backend: Backend
    ) -> ViewLayoutResult {
        let group = Group(content: self)
        return group.computeLayout(
            widget,
            children: children,
            proposedSize: proposedSize,
            environment: environment,
            backend: backend
        )
    }

    @MainActor
    func commit<Backend: BaseAppBackend>(
        _ widget: Backend.Widget,
        children: Children,
        layout: ViewLayoutResult,
        environment: EnvironmentValues,
        backend: Backend
    ) {
        let group = Group(content: self)
        group.commit(
            widget,
            children: children,
            layout: layout,
            environment: environment,
            backend: backend
        )
    }
}

% for i in range(maximum_view_count):
%{
view = "TupleView%d" % (i + 1)
struct_parameters = ", ".join(["View%d: View" % (j) for j in range(i + 1)])
properties = "\n    ".join(["public var view%d: View%d" % (j, j) for j in range(i + 1)])
init_parameters = ", ".join(["_ view%d: View%d" % (j, j) for j in range(i + 1)])
init_body = "\n        ".join(["self.view%d = view%d" % (j, j) for j in range(i + 1)])
children_type_parameters = ", ".join(["View%d" % j for j in range(i + 1)])
}%

/// A view with exactly ${i + 1} children. Autogenerated as an alternative to Swift's not yet
/// production ready variadic generics.
///
/// Has the same behaviour as ``Group`` when rendered directly.
public struct ${view}<
    ${struct_parameters}
> {
    ${properties}

    public var body = EmptyView()

    /// Wraps ${i + 1} child views in a single container view.
    public init(
        ${init_parameters}
    ) {
        ${init_body}
    }
}

extension ${view}: View {
    public typealias Content = EmptyView
    public var _asMenuItems: [MenuItem] {
        var result: [MenuItem] = []
        % for j in range(i + 1):
        result += view${j}._asMenuItems
        % end
        return result
    }
}

extension ${view}: TupleView {
    typealias Children = TupleViewChildren${i + 1}<${children_type_parameters}>

    func children<Backend: BaseAppBackend>(
        backend: Backend,
        snapshots: [ViewGraphSnapshotter.NodeSnapshot]?,
        environment: EnvironmentValues
    ) -> Children {
        return Children(
            ${" ".join("view%d," % j for j in range(i + 1))}
            backend: backend, snapshots: snapshots, environment: environment
        )
    }

    func layoutableChildren<Backend: BaseAppBackend>(
        backend: Backend,
        children: Children
    ) -> [LayoutSystem.LayoutableChild] {
        [
            % for j in range(i + 1):
            layoutableChild(node: children.child${j}, view: view${j}),
            % end
        ]
    }
}