SwiftUI ButtonStyle that mimics classic beveled buttons from NeXTSTEP and Windows 95

RedmondButtonStyle.swift

import SwiftUI

extension Color {
    static var redmondBackground = Color(white: 0.78)
    static var redmondShadow = Color(white: 0.55)
}

extension Font {
    static var redmondLabel = Font(UIFont(name: "MicrosoftSansSerif", size: UIFont.labelFontSize)!)
}

struct RedmondButtonStyle: ButtonStyle {
    @State var lineWidth: CGFloat = 2

    func makeBody(configuration: Self.Configuration) -> some View {
        let offset = configuration.isPressed ? lineWidth : 0
        return configuration.label
            .font(.redmondLabel)
            .offset(x: offset, y: offset).animation(nil)
            .background(
                ZStack {
                    Corner(style: configuration.isPressed ? .topLeft : .bottomRight).stroke(Color.redmondShadow, lineWidth: lineWidth).padding(lineWidth)
                    Corner(style: configuration.isPressed ? .bottomRight : .topLeft).stroke(Color.white, lineWidth: lineWidth)
                    Corner(style: configuration.isPressed ? .topLeft : .bottomRight).stroke(Color.black, lineWidth: lineWidth)
                }
                .animation(nil)
            )
    }
}

struct Corner: Shape {
    enum Style { case topLeft, bottomRight }

    @State var style: Style

    func path(in rect: CGRect) -> Path {
        Path { path in
            path.move(to: CGPoint(x: 0, y: rect.size.height))
            path.addLine(to: style == .topLeft ? .zero : CGPoint(x: rect.size.width, y: rect.size.height))
            path.addLine(to: CGPoint(x: rect.size.width, y: 0))
        }
    }
}

struct DemoView: View {
    private func button(text: String, action: @escaping () -> ()) -> some View {
        button(content: Text(text).frame(width: 90, height: 35), action: action)
    }

    private func button(systemImageName: String, action: @escaping () -> ()) -> some View {
        button(content:
            Image(systemName: systemImageName)
                .resizable()
                .aspectRatio(contentMode: .fit)
                .frame(width: 25, height: 25)
                .padding(8),
               action: action)
    }

    private func button<T: View>(content: T, action: @escaping () -> ()) -> some View {
        Button(action: action) {
            content
        }.buttonStyle(RedmondButtonStyle())
    }

    var body: some View {
        VStack(alignment: .leading, spacing: 20) {
            HStack {
                button(systemImageName: "doc.text") { print("doc") }
                button(systemImageName: "folder") {}
                button(systemImageName: "calendar") {}
                button(systemImageName: "person") {}
                button(systemImageName: "trash") {}
                Spacer()
            }

            HStack {
                button(text: "Cancel") {}
                button(text: "OK") { print("ok") }
                Spacer()
            }

            Spacer()
        }
        .padding()
        .background(Color.redmondBackground)
    }
}

struct DemoView_Previews: PreviewProvider {
    static var previews: some View {
        DemoView()
    }
}

RedmondButtonStyle.swift.gif

Not working.