63 lines
2.0 KiB
Swift
63 lines
2.0 KiB
Swift
//
|
|
// AppearObserver.swift
|
|
// Meta
|
|
//
|
|
// Created by david-swift on 29.06.24.
|
|
//
|
|
|
|
/// Run a custom code accessing the view's storage when initializing the view.
|
|
struct AppearObserver: ConvenienceWidget {
|
|
|
|
/// The custom code to edit the widget.
|
|
var modify: (ViewStorage) -> Void
|
|
/// The wrapped view.
|
|
var content: AnyView
|
|
|
|
/// The view storage.
|
|
/// - Parameters:
|
|
/// - modifiers: Modify views before being updated.
|
|
/// - type: The type of the widgets.
|
|
func container<WidgetType>(modifiers: [(any AnyView) -> any AnyView], type: WidgetType.Type) -> ViewStorage {
|
|
let storage = content.storage(modifiers: modifiers, type: type)
|
|
modify(storage)
|
|
return .init(nil, content: [.mainContent: [storage]])
|
|
}
|
|
|
|
/// Update the stored content.
|
|
/// - Parameters:
|
|
/// - storage: The storage to update.
|
|
/// - modifiers: Modify views before being updated
|
|
/// - updateProperties: Whether to update the view's properties.
|
|
/// - type: The type of the widgets.
|
|
func update<WidgetType>(
|
|
_ storage: ViewStorage,
|
|
modifiers: [(any AnyView) -> any AnyView],
|
|
updateProperties: Bool,
|
|
type: WidgetType.Type
|
|
) {
|
|
guard let storage = storage.content[.mainContent]?.first else {
|
|
return
|
|
}
|
|
content.updateStorage(storage, modifiers: modifiers, updateProperties: updateProperties, type: type)
|
|
}
|
|
|
|
}
|
|
|
|
extension AnyView {
|
|
|
|
/// Run a function on the widget when it appears for the first time.
|
|
/// - Parameter closure: The function.
|
|
/// - Returns: A view.
|
|
public func inspectOnAppear(_ closure: @escaping (ViewStorage) -> Void) -> AnyView {
|
|
AppearObserver(modify: closure, content: self)
|
|
}
|
|
|
|
/// Run a function when the view appears for the first time.
|
|
/// - Parameter closure: The function.
|
|
/// - Returns: A view.
|
|
public func onAppear(_ closure: @escaping () -> Void) -> AnyView {
|
|
inspectOnAppear { _ in closure() }
|
|
}
|
|
|
|
}
|