fix: improve key repeat-rate when held (closes #2026)

src/logic/KeyRepeatTimer.swift

@@ -7,6 +7,7 @@ class KeyRepeatTimer {
 
     static func toggleRepeatingKeyPreviousWindow() {
         if let shortcut = ControlsTab.shortcuts["previousWindowShortcut"],
+           // events already repeat when using a shortcut with a keycode; no need for artificial repeat
            shortcut.shortcut.keyCode == .none {
             toggleRepeatingKey(shortcut) {
                 App.app.previousWindowShortcutWithRepeatingKey()
@@ -23,7 +24,7 @@ class KeyRepeatTimer {
     }
 
     private static func toggleRepeatingKey(_ atShortcut: ATShortcut, _ block: @escaping () -> Void) {
-        if (timer == nil || !timer!.isValid) {
+        if ((timer == nil || !timer!.isValid) && atShortcut.state != .up) {
             let repeatRate = ticksToSeconds(defaults.string(forKey: "KeyRepeat") ?? "6")
             let initialDelay = ticksToSeconds(defaults.string(forKey: "InitialKeyRepeat") ?? "25")
             timer = Timer(fire: Date(timeIntervalSinceNow: initialDelay), interval: repeatRate, repeats: true, block: { _ in
@@ -40,6 +41,6 @@ class KeyRepeatTimer {
     }
 
     private static func ticksToSeconds(_ appleNumber: String) -> Double {
-        return Double(appleNumber)! / 60
+        return Double(appleNumber)! / 60 // Apple probably hard-coupled key repeat-rate with 60hz monitors
     }
 }

src/logic/Windows.swift

@@ -118,7 +118,6 @@ class Windows {
         let nextIndex = windowIndexAfterCycling(step)
         if ((step > 0 && nextIndex < focusedWindowIndex) || (step < 0 && nextIndex > focusedWindowIndex)) &&
                (KeyRepeatTimer.isARepeat || KeyRepeatTimer.timer?.isValid ?? false) {
-            KeyRepeatTimer.timer?.invalidate()
             return
         }
         updateFocusedWindowIndex(nextIndex)

src/ui/main-window/ThumbnailsView.swift

@@ -42,7 +42,6 @@ class ThumbnailsView: NSVisualEffectView {
             let nextRow_ = nextRow < 0 ? rows.count + nextRow : nextRow
             if ((step > 0 && nextRow_ < currentRow) || (step < 0 && nextRow_ > currentRow)) &&
                    (KeyRepeatTimer.isARepeat || KeyRepeatTimer.timer?.isValid ?? false) {
-                KeyRepeatTimer.timer?.invalidate()
                 return nil
             }
             return rows[nextRow_]

src/ui/preferences-window/tabs/GeneralTab.swift

@@ -35,7 +35,7 @@ class GeneralTab {
         App.app.restart()
     }
 
-    // add/remove plist file in ~/Library/LaunchAgents/ depending on the checkbox state
+    /// add/remove plist file in ~/Library/LaunchAgents/ depending on the checkbox state
     static func startAtLoginCallback(_ sender: NSControl) {
         var launchAgentsPath = (try? FileManager.default.url(for: .libraryDirectory, in: .userDomainMask, appropriateFor: nil, create: false)) ?? URL.init(fileURLWithPath: "~/Library", isDirectory: true)
         launchAgentsPath.appendPathComponent("LaunchAgents", isDirectory: true)
@@ -49,12 +49,19 @@ class GeneralTab {
         launchAgentsPath.appendPathComponent("com.lwouis.alt-tab-macos.plist", isDirectory: false)
         if (sender as! NSButton).state == .on {
             // docs: https://developer.apple.com/library/archive/technotes/tn2083/_index.html#//apple_ref/doc/uid/DTS10003794-CH1-SECTION23
+            // docs: man launchd.plist
             let plist: NSDictionary = [
                 "Label": App.id,
                 "Program": Bundle.main.executablePath ?? "/Applications/\(App.name).app/Contents/MacOS/\(App.name)",
                 "RunAtLoad": true,
                 "LimitLoadToSessionType": "Aqua",
                 "AssociatedBundleIdentifiers": App.id,
+                // "ProcessType: If left unspecified, the system will apply light resource limits to the job,
+                //               throttling its CPU usage and I/O bandwidth"
+                "ProcessType": "Interactive",
+                // "LegacyTimers": If this key is set to true, timers created by the job will opt into less
+                //                 efficient but more precise behavior and not be coalesced with other timers.
+                "LegacyTimers": true,
             ]
             plist.write(to: launchAgentsPath, atomically: true)
         } else {