fix: keyboard events don't stop being listened to (closes #18)

lwouis · Oct 4, 2019 · 75db5e9 · 75db5e9
1 parent f9f4565
commit 75db5e9
Showing 1 changed file with 23 additions and 17 deletions.
diff --git a/alt-tab-macos/logic/Keyboard.swift b/alt-tab-macos/logic/Keyboard.swift
@@ -1,8 +1,10 @@
 import Cocoa
 
+var eventTap: CFMachPort?
+
 func listenToGlobalKeyboardEvents(_ delegate: Application) {
     let eventMask = [CGEventType.keyDown, CGEventType.keyUp, CGEventType.flagsChanged].reduce(CGEventMask(0), { $0 | (1 << $1.rawValue) })
-    let eventTap = CGEvent.tapCreate(
+    eventTap = CGEvent.tapCreate(
             tap: .cgSessionEventTap,
             place: .headInsertEventTap,
             options: .defaultTap,
@@ -19,23 +21,27 @@ func listenToGlobalKeyboardEvents(_ delegate: Application) {
 }
 
 func keyboardHandler(_ cgEvent: CGEvent, _ delegate: Application) -> Unmanaged<CGEvent>? {
-    if cgEvent.type == .keyDown || cgEvent.type == .keyUp || cgEvent.type == .flagsChanged, let event = NSEvent.init(cgEvent: cgEvent) {
-        let keyDown = event.type == .keyDown
-        let optionKeyEvent = event.keyCode == metaKey
-        let tabKeyEvent = event.keyCode == tabKey
-        if optionKeyEvent && event.modifiersDown([metaModifierFlag]) {
-            delegate.keyDownMeta()
-        } else if tabKeyEvent && event.modifiersDown([metaModifierFlag]) && keyDown {
-            delegate.keyDownMetaTab()
-            // focused app will not receive the event (will not press tab key in that app)
-            return nil
-        } else if tabKeyEvent && event.modifiersDown([metaModifierFlag, .shift]) && keyDown {
-            delegate.keyDownMetaShiftTab()
-            // focused app will not receive the event (will not press tab key in that app)
-            return nil
-        } else if optionKeyEvent && !keyDown {
-            delegate.keyUpMeta()
+    if cgEvent.type == .keyDown || cgEvent.type == .keyUp || cgEvent.type == .flagsChanged {
+        if let event = NSEvent.init(cgEvent: cgEvent) {
+            let keyDown = event.type == .keyDown
+            let optionKeyEvent = event.keyCode == metaKey
+            let tabKeyEvent = event.keyCode == tabKey
+            if optionKeyEvent && event.modifiersDown([metaModifierFlag]) {
+                delegate.keyDownMeta()
+            } else if tabKeyEvent && event.modifiersDown([metaModifierFlag]) && keyDown {
+                delegate.keyDownMetaTab()
+                // focused app will not receive the event (will not press tab key in that app)
+                return nil
+            } else if tabKeyEvent && event.modifiersDown([metaModifierFlag, .shift]) && keyDown {
+                delegate.keyDownMetaShiftTab()
+                // focused app will not receive the event (will not press tab key in that app)
+                return nil
+            } else if optionKeyEvent && !keyDown {
+                delegate.keyUpMeta()
+            }
         }
+    } else if cgEvent.type == .tapDisabledByUserInput || cgEvent.type == .tapDisabledByTimeout {
+        CGEvent.tapEnable(tap: eventTap!, enable: true)
     }
     // focused app will receive the event
     return Unmanaged.passRetained(cgEvent)