Feat macos (#2)

---------

Co-authored-by: intelligence <intelligence@debian.local>
Co-authored-by: jourintown <jourintown@proton.me>
Reviewed-on: #2

macos/Sources/Transui/HotkeyRecorder.swift

@@ -0,0 +1,59 @@
+import AppKit
+import SwiftUI
+
+struct HotkeyRecorder: NSViewRepresentable {
+  @Binding var shortcut: HotkeyShortcut
+
+  func makeNSView(context: Context) -> HotkeyCaptureView {
+    let view = HotkeyCaptureView()
+    view.onShortcut = { shortcut = $0 }
+    view.stringValue = shortcut.displayName
+    return view
+  }
+
+  func updateNSView(_ view: HotkeyCaptureView, context: Context) {
+    view.onShortcut = { shortcut = $0 }
+    if view.window?.firstResponder !== view {
+      view.stringValue = shortcut.displayName
+    }
+  }
+}
+
+final class HotkeyCaptureView: NSTextField {
+  var onShortcut: ((HotkeyShortcut) -> Void)?
+
+  override init(frame frameRect: NSRect) {
+    super.init(frame: frameRect)
+    isEditable = false
+    isSelectable = false
+    isBezeled = true
+    bezelStyle = .roundedBezel
+    alignment = .center
+    font = .monospacedSystemFont(ofSize: NSFont.systemFontSize, weight: .medium)
+    toolTip = "Click, then press a shortcut"
+  }
+
+  required init?(coder: NSCoder) { nil }
+
+  override var acceptsFirstResponder: Bool { true }
+
+  override func mouseDown(with event: NSEvent) {
+    window?.makeFirstResponder(self)
+    stringValue = "Type shortcut"
+  }
+
+  override func keyDown(with event: NSEvent) {
+    guard let shortcut = HotkeyShortcut(event: event) else {
+      NSSound.beep()
+      return
+    }
+    stringValue = shortcut.displayName
+    onShortcut?(shortcut)
+    window?.makeFirstResponder(nil)
+  }
+
+  override func resignFirstResponder() -> Bool {
+    needsDisplay = true
+    return super.resignFirstResponder()
+  }
+}