Initial commit.

2024-12-27 15:25:41 -08:00
commit d6e097506a
26 changed files with 1433 additions and 0 deletions
--- a/src/GlobalEventTap.swift
+++ b/src/GlobalEventTap.swift
@@ -0,0 +1,74 @@
+import AppKit
+import Carbon
+import OSLog
+
+fileprivate func handleGlobalEvents(proxy: CGEventTapProxy, 
+                                    type: CGEventType, event: CGEvent,
+                                    refcon: UnsafeMutableRawPointer?
+                                    ) -> Unmanaged<CGEvent>? {
+    let logger = Logger(
+        subsystem: Bundle.main.bundleIdentifier!,
+        category: String(describing: AppDelegate.self)
+    )
+
+    switch type {
+        case .keyDown:
+            //logger.debug(".keyDown")
+
+            if (event.flags.rawValue & CGEventFlags.maskAlternate.rawValue) == CGEventFlags.maskAlternate.rawValue &&
+               (event.flags.rawValue & (CGEventFlags.maskShift.rawValue | CGEventFlags.maskControl.rawValue | CGEventFlags.maskCommand.rawValue)) == 0 {
+                logger.debug("maskAlternate")
+            }
+
+            logger.debug("Option rawValue=\(CGEventFlags.maskAlternate.rawValue)")
+
+            // var keyCode = event.getIntegerValueField(.keyboardEventKeycode)
+            //if keyCode == 49 {
+            //    logger.debug("EVENT TAP")
+            //    return nil
+            //}
+        case .keyUp:
+            //logger.debug(".keyUp")
+            break
+        default:
+            break
+    }
+
+
+   //event.setIntegerValueField(.keyboardEventKeycode, value: keyCode) // NOTE: ???
+
+    return Unmanaged.passUnretained(event)
+}
+
+final class GlobalEventTap {
+    fileprivate static let logger = Logger(
+        subsystem: Bundle.main.bundleIdentifier!,
+        category: String(describing: GlobalEventTap.self)
+    )
+
+    static let shared = GlobalEventTap()
+
+    private init() {}
+
+    deinit {}
+
+    func enable() {
+        let eventMask = (1 << CGEventType.keyDown.rawValue) | (1 << CGEventType.keyUp.rawValue)
+        guard let eventTap = CGEvent.tapCreate(tap: .cgSessionEventTap,
+                                              place: .headInsertEventTap,
+                                              options: .defaultTap,
+                                              eventsOfInterest: CGEventMask(eventMask),
+                                              callback: handleGlobalEvents,
+                                              userInfo: nil) else {
+                                                  Self.logger.debug("Failed to create event.")
+                                                  return
+                                              }
+
+        Self.logger.debug("Event was created.")
+
+        let runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventTap, 0)
+        CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, .commonModes)
+        CGEvent.tapEnable(tap: eventTap, enable: true)
+        CFRunLoopRun()
+    }
+}