77 lines
2.5 KiB
Swift
77 lines
2.5 KiB
Swift
//
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// Property.swift
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// Meta
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//
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// Created by david-swift on 16.09.24.
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//
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/// Assign an observing and updating closure to a widget's binding property.
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///
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/// This will be used if you do not provide a custom ``Widget/update(_:data:updateProperties:type:)`` method
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/// or call the ``Widget/updateProperties(_:updateProperties:)`` method in your custom update method.
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@propertyWrapper
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public struct BindingProperty<Value, Pointer>: BindingPropertyProtocol {
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/// The wrapped binding.
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public var wrappedValue: Binding<Value>
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/// Observe the UI element.
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var observe: (Pointer, Binding<Value>, ViewStorage) -> Void
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/// Set the UI element's property.
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var setValue: (Pointer, Value, ViewStorage) -> Void
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/// Initialize a property.
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/// - Parameters:
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/// - wrappedValue: The wrapped value.
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/// - getProperty: Get the property from the UI.
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/// - setProperty: The function applying the property to the UI.
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/// - pointer: The type of the pointer.
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public init(
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wrappedValue: Binding<Value>,
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observe: @escaping (Pointer, Binding<Value>, ViewStorage) -> Void,
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set setValue: @escaping (Pointer, Value, ViewStorage) -> Void,
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pointer: Pointer.Type
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) {
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self.wrappedValue = wrappedValue
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self.observe = observe
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self.setValue = setValue
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}
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/// Initialize a property.
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/// - Parameters:
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/// - wrappedValue: The wrapped value.
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/// - getProperty: Get the property from the UI.
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/// - setProperty: The function applying the property to the UI.
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/// - pointer: The type of the pointer.
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public init(
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wrappedValue: Binding<Value>,
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observe: @escaping (Pointer, Binding<Value>) -> Void,
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set setValue: @escaping (Pointer, Value) -> Void,
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pointer: Pointer.Type
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) {
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self.init(
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wrappedValue: wrappedValue,
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observe: { pointer, value, _ in observe(pointer, value) },
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set: { pointer, value, _ in setValue(pointer, value) },
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pointer: pointer
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)
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}
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}
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/// The binding property protocol.
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protocol BindingPropertyProtocol {
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/// The binding's wrapped value.
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associatedtype Value
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/// The storage's pointer.
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associatedtype Pointer
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/// The wrapped value.
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var wrappedValue: Binding<Value> { get }
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/// Observe the property.
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var observe: (Pointer, Binding<Value>, ViewStorage) -> Void { get }
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/// Set the property.
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var setValue: (Pointer, Value, ViewStorage) -> Void { get }
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}
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