51 lines
1.3 KiB
Swift
51 lines
1.3 KiB
Swift
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//
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// Box.swift
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// Box
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//
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// Created by James Magahern on 7/13/21.
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//
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import UIKit
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struct Box<Identifier: Hashable> {
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typealias Compartment = (Identifier, CGRect)
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typealias Realized = (Identifier, UIView)
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@resultBuilder
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struct BoxBuilder {
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static func buildEither(first component: [Compartment]) -> Compartment {
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component[0]
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}
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static func buildEither(second component: [Compartment]) -> Compartment {
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component[0]
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}
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static func buildBlock(_ compartments: Compartment...) -> [Compartment] {
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return compartments
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}
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}
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public var boundingRect: CGRect {
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get {
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compartmentMap.reduce(into: CGRect.zero) { (result, compartment) in
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result = result.union(compartment.value)
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}
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}
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}
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private var compartmentMap: [Identifier: CGRect] = [:]
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init(@BoxBuilder _ compartments: () -> [Compartment]) {
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self.compartmentMap = compartments().reduce(into: [:]) { (result, compartment) in
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result[compartment.0] = compartment.1
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}
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}
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public func fill(_ realized: [Identifier: UIView]) {
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realized.forEach { (key, value) in
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value.frame = compartmentMap[key] ?? .zero
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}
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}
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}
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