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131 lines
4.2 KiB
Swift
131 lines
4.2 KiB
Swift
import Cocoa
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import CoreGraphics
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/// 全局 Fn / Globe 键监听器
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final class KeyMonitor {
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// Fn 键标志：CGEventFlags.maskSecondaryFn = 0x00800000
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private static let fnMask: UInt64 = 0x00800000
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private var eventTap: CFMachPort?
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private var runLoopSource: CFRunLoopSource?
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private var isFnPressed = false
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var onFnDown: (() -> Void)?
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var onFnUp: (() -> Void)?
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func start() -> Bool {
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guard eventTap == nil else { return true }
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guard CGPreflightListenEventAccess() else {
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CGRequestListenEventAccess()
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print("[KeyMonitor] ❌ Accessibility permission not granted")
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return false
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}
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let eventMask = (1 << CGEventType.flagsChanged.rawValue)
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| (1 << CGEventType.keyDown.rawValue)
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| (1 << CGEventType.keyUp.rawValue)
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let callback: CGEventTapCallBack = { (proxy, type, event, refcon) -> Unmanaged<CGEvent>? in
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let monitor = Unmanaged<KeyMonitor>.fromOpaque(refcon!).takeUnretainedValue()
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return monitor.handleEvent(proxy: proxy, type: type, event: event)
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}
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// 尝试 HID 级 tap（能捕获被系统拦截的 Fn 键）
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var tap = CGEvent.tapCreate(
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tap: .cghidEventTap,
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place: .headInsertEventTap,
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options: .defaultTap,
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eventsOfInterest: CGEventMask(eventMask),
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callback: callback,
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userInfo: Unmanaged.passUnretained(self).toOpaque()
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)
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if tap == nil {
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// 回退到会话级 tap
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print("[KeyMonitor] ⚠️ HID tap failed, falling back to session tap")
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tap = CGEvent.tapCreate(
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tap: .cgSessionEventTap,
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place: .headInsertEventTap,
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options: .defaultTap,
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eventsOfInterest: CGEventMask(eventMask),
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callback: callback,
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userInfo: Unmanaged.passUnretained(self).toOpaque()
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)
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}
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guard let tap = tap else {
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print("[KeyMonitor] ❌ Failed to create event tap")
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return false
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}
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eventTap = tap
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runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, tap, 0)
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CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, .commonModes)
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CGEvent.tapEnable(tap: tap, enable: true)
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print("[KeyMonitor] ✅ Started")
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return true
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}
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func stop() {
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guard let tap = eventTap else { return }
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CGEvent.tapEnable(tap: tap, enable: false)
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if let source = runLoopSource {
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CFRunLoopRemoveSource(CFRunLoopGetCurrent(), source, .commonModes)
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}
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eventTap = nil
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runLoopSource = nil
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print("[KeyMonitor] Stopped")
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}
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private func handleEvent(proxy: CGEventTapProxy, type: CGEventType, event: CGEvent) -> Unmanaged<CGEvent>? {
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let flags = event.flags.rawValue
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let fnInFlags = (flags & Self.fnMask) != 0
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switch type {
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case .flagsChanged:
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if fnInFlags && !isFnPressed {
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print("[KeyMonitor] ⚡️ Fn DOWN (flags=0x\(String(flags, radix: 16)))")
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return handleFnDown()
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}
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if !fnInFlags && isFnPressed {
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print("[KeyMonitor] ⚡️ Fn UP (flags=0x\(String(flags, radix: 16)))")
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return handleFnUp()
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}
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return Unmanaged.passUnretained(event)
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case .keyDown, .keyUp:
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let keyCode = event.getIntegerValueField(.keyboardEventKeycode)
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if keyCode == 63 && fnInFlags {
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return handleFnDown()
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}
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return Unmanaged.passUnretained(event)
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default:
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return Unmanaged.passUnretained(event)
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}
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}
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private func handleFnDown() -> Unmanaged<CGEvent>? {
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if !isFnPressed {
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isFnPressed = true
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DispatchQueue.main.async { [weak self] in
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self?.onFnDown?()
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}
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}
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return nil
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}
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private func handleFnUp() -> Unmanaged<CGEvent>? {
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if isFnPressed {
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isFnPressed = false
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DispatchQueue.main.async { [weak self] in
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self?.onFnUp?()
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}
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}
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return nil
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}
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}
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