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//
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// ChatLayout
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// StaticViewFactory.swift
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// https://github.com/ekazaev/ChatLayout
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//
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// Created by Eugene Kazaev in 2020-2023.
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// Distributed under the MIT license.
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//
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// Become a sponsor:
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// https://github.com/sponsors/ekazaev
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//
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import Foundation
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import UIKit
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/// A factory that creates optional contained `UIView`s should conform to this protocol.
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public protocol StaticViewFactory {
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/// A type of the view to build.
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associatedtype View: UIView
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/// Factory method that will be called by the corresponding container `UIView`
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/// - Parameter bounds: A bounds rect of the container.
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/// - Returns: Build `UIView` instance.
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static func buildView(within bounds: CGRect) -> View?
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}
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/// Default extension build the `UIView` using its default constructor.
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public extension StaticViewFactory where Self: UIView {
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static func buildView(within bounds: CGRect) -> Self? {
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Self(frame: bounds)
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}
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}
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/// Use this factory to specify that this view should not be build and should be equal to nil within the container.
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public struct VoidViewFactory: StaticViewFactory {
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/// Nil view placeholder type.
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public final class VoidView: UIView {
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@available(*, unavailable, message: "This view can not be instantiated.")
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public required init?(coder aDecoder: NSCoder) {
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fatalError("This view can not be instantiated.")
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}
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@available(*, unavailable, message: "This view can not be instantiated.")
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public override init(frame: CGRect) {
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fatalError("This view can not be instantiated.")
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}
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@available(*, unavailable, message: "This view can not be instantiated.")
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public init() {
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fatalError("This view can not be instantiated.")
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}
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}
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public static func buildView(within bounds: CGRect) -> VoidView? {
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nil
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}
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}
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