71 lines
1.9 KiB
Swift
71 lines
1.9 KiB
Swift
import Carbon.HIToolbox
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import Foundation
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final class HotkeyManager {
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private var hotkey: EventHotKeyRef?
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private var handler: EventHandlerRef?
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private var action: (() -> Void)?
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init() {
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var type = EventTypeSpec(
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eventClass: OSType(kEventClassKeyboard),
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eventKind: UInt32(kEventHotKeyPressed)
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)
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InstallEventHandler(
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GetApplicationEventTarget(),
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{ _, event, context in
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guard let event, let context else { return noErr }
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var identifier = EventHotKeyID()
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let status = GetEventParameter(
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event,
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EventParamName(kEventParamDirectObject),
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EventParamType(typeEventHotKeyID),
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nil,
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MemoryLayout<EventHotKeyID>.size,
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nil,
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&identifier
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)
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guard status == noErr, identifier.id == 1 else { return status }
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let manager = Unmanaged<HotkeyManager>.fromOpaque(context).takeUnretainedValue()
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DispatchQueue.main.async { manager.action?() }
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return noErr
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},
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1,
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&type,
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Unmanaged.passUnretained(self).toOpaque(),
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&handler
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)
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}
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deinit {
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unregister()
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if let handler { RemoveEventHandler(handler) }
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}
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@discardableResult
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func register(_ shortcut: HotkeyShortcut, action: @escaping () -> Void) -> Bool {
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let identifier = EventHotKeyID(signature: Self.signature, id: 1)
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var candidate: EventHotKeyRef?
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let status = RegisterEventHotKey(
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shortcut.keyCode,
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shortcut.modifiers,
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identifier,
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GetApplicationEventTarget(),
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0,
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&candidate
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)
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guard status == noErr, let candidate else { return false }
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unregister()
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hotkey = candidate
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self.action = action
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return true
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}
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private func unregister() {
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if let hotkey { UnregisterEventHotKey(hotkey) }
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hotkey = nil
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}
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private static let signature: OSType = 0x5452_5549 // TRUI
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}
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