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Add support for ID subscripts

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This commit is contained in:
david-swift 2024-04-04 16:04:35 +02:00
parent 50b22115b0
commit 8cba3242f5
2 changed files with 46 additions and 16 deletions
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35
Sources/Adwaita/Model/Data Flow/Binding.swift
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@ -111,3 +111,38 @@ public struct Binding<Value> {
} }
} }
extension Binding where Value: MutableCollection {
/// Get a child at a certain index of the array as a binding.
/// - Parameters:
/// - index: The child's index.
/// - defaultValue: The value used if the index is out of range does not exist.
/// - Returns: The child as a binding.
public subscript(safe index: Value.Index?, default defaultValue: Value.Element) -> Binding<Value.Element> {
.init {
if let index, wrappedValue.indices.contains(index) {
return wrappedValue[index] ?? defaultValue
}
return defaultValue
} set: { newValue in
if let index, wrappedValue.indices.contains(index) {
wrappedValue[index] = newValue
}
}
}
}
extension Binding where Value: MutableCollection, Value.Element: Identifiable {
/// Get a child of the array with a certain id as a binding.
/// - Parameters:
/// - id: The child's id.
/// - defaultValue: The value used if the index is out of range does not exist.
/// - Returns: The child as a binding.
public subscript(id id: Value.Element.ID?, default defaultValue: Value.Element) -> Binding<Value.Element> {
self[safe: wrappedValue.firstIndex { $0.id == id }, default: defaultValue]
}
}

27
Sources/Adwaita/Model/Extensions/Array.swift
View File

@ -105,24 +105,19 @@ extension Array {
} }
extension Binding where Value: MutableCollection { extension Array where Element: Identifiable {
/// Get a child at a certain index of the array as a binding. /// Accesses the element with a certain id safely.
/// - Parameters: /// - Parameters:
/// - index: The child's index. /// - id: The child's id.
/// - defaultValue: The value used if the index is out of range does not exist. ///
/// - Returns: The child as a binding. /// Access and set elements the safe way:
public subscript(safe index: Value.Index?, default defaultValue: Value.Element) -> Binding<Value.Element> { /// ```swift
.init { /// var array = ["Hello", "World"]
if let index, wrappedValue.indices.contains(index) { /// print(array[safe: 2] ?? "Out of range")
return wrappedValue[index] ?? defaultValue /// ```
} public subscript(id id: Element.ID) -> Element? {
return defaultValue self[safe: firstIndex { $0.id == id }]
} set: { newValue in
if let index, wrappedValue.indices.contains(index) {
wrappedValue[index] = newValue
}
}
} }
} }