76 lines
2.2 KiB
Swift
76 lines
2.2 KiB
Swift
// Copyright 2020 Tokamak contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Created by Carson Katri on 8/2/20.
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//
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public struct _NavigationLinkStyleConfiguration: View {
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public let body: AnyView
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public let isSelected: Bool
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}
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public protocol _NavigationLinkStyle {
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associatedtype Body: View
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typealias Configuration = _NavigationLinkStyleConfiguration
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func makeBody(configuration: Configuration) -> Self.Body
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}
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public struct _DefaultNavigationLinkStyle: _NavigationLinkStyle {
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public func makeBody(configuration: Configuration) -> some View {
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configuration.foregroundColor(.accentColor)
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}
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}
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public struct _AnyNavigationLinkStyle: _NavigationLinkStyle {
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public typealias Body = AnyView
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private let bodyClosure: (_NavigationLinkStyleConfiguration) -> AnyView
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public let type: Any.Type
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public init<S: _NavigationLinkStyle>(_ style: S) {
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type = S.self
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bodyClosure = { configuration in
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AnyView(style.makeBody(configuration: configuration))
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}
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}
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public func makeBody(configuration: Configuration) -> AnyView {
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bodyClosure(configuration)
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}
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}
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public enum _NavigationLinkStyleKey: EnvironmentKey {
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public static var defaultValue: _AnyNavigationLinkStyle {
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_AnyNavigationLinkStyle(_DefaultNavigationLinkStyle())
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}
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}
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extension EnvironmentValues {
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var _navigationLinkStyle: _AnyNavigationLinkStyle {
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get {
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self[_NavigationLinkStyleKey.self]
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}
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set {
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self[_NavigationLinkStyleKey.self] = newValue
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}
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}
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}
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public extension View {
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@_spi(TokamakCore)
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func _navigationLinkStyle<S: _NavigationLinkStyle>(_ style: S) -> some View {
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environment(\._navigationLinkStyle, _AnyNavigationLinkStyle(style))
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}
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}
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