55 lines
1.4 KiB
Swift
55 lines
1.4 KiB
Swift
import AppKit
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import SwiftUI
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struct WindowAccessor: NSViewRepresentable {
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let onWindow: (NSWindow) -> Void
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func makeCoordinator() -> Coordinator {
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Coordinator()
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}
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func makeNSView(context: Context) -> WindowObservingView {
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let view = WindowObservingView()
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view.onWindow = { window in
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guard context.coordinator.lastWindow !== window else { return }
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context.coordinator.lastWindow = window
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onWindow(window)
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}
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return view
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}
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func updateNSView(_ nsView: WindowObservingView, context: Context) {
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nsView.onWindow = { window in
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guard context.coordinator.lastWindow !== window else { return }
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context.coordinator.lastWindow = window
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onWindow(window)
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}
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if let window = nsView.window {
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nsView.onWindow?(window)
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}
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}
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}
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extension WindowAccessor {
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final class Coordinator {
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weak var lastWindow: NSWindow?
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}
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}
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final class WindowObservingView: NSView {
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var onWindow: ((NSWindow) -> Void)?
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override func viewWillMove(toWindow newWindow: NSWindow?) {
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super.viewWillMove(toWindow: newWindow)
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if let newWindow {
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onWindow?(newWindow)
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}
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}
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override func viewDidMoveToWindow() {
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super.viewDidMoveToWindow()
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if let window {
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onWindow?(window)
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}
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}
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}
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