/
Binding+Umbrella.swift
93 lines (81 loc) · 2.9 KB
/
Binding+Umbrella.swift
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//
// Created by Jeffrey Bergier on 2022/07/04.
//
// MIT License
//
// Copyright (c) 2021 Jeffrey Bergier
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
import SwiftUI
extension Binding {
public func map<T>(get: @escaping (Value) -> T, set: @escaping (T) -> Value) -> Binding<T> {
.init {
get(self.wrappedValue)
} set: {
self.wrappedValue = set($0)
}
}
}
extension Binding {
public func compactMap<T>(`default`: T) -> Binding<T> where Value == Optional<T> {
self.map(get: { $0 ?? `default` }, set: { $0 })
}
}
extension Binding where Value == Optional<String> {
public func compactMap() -> Binding<String> {
self.map(get: { $0 ?? "" }, set: { $0 })
}
}
extension Binding where Value == Optional<Int> {
public func compactMap() -> Binding<Int> {
self.map(get: { $0 ?? 0 }, set: { $0 })
}
}
extension Binding where Value == Optional<Double> {
public func compactMap() -> Binding<Double> {
self.map(get: { $0 ?? 0 }, set: { $0 })
}
}
extension Binding where Value == Bool {
public var flipped: Binding<Bool> {
self.map(get: { !$0 }, set: { !$0 })
}
}
extension Binding where Value == Optional<Bool> {
public func compactMap() -> Binding<Bool> {
self.map(get: { $0 ?? false }, set: { $0 })
}
}
extension Binding {
public func mapBool<T>() -> Binding<Bool> where Value == Optional<T> {
return Binding<Bool> {
return self.wrappedValue != nil
} set: {
guard $0 == false else { return }
self.wrappedValue = nil
}
}
public func mapBool() -> Binding<Bool> where Value: Collection & ExpressibleByArrayLiteral {
return Binding<Bool> {
!self.wrappedValue.isEmpty
} set: {
guard $0 == false else { return }
self.wrappedValue = []
}
}
}