Fix swapping

main.go

@@ -43,7 +43,7 @@ func init() {
 		log.Lmicroseconds|log.Lshortfile)
 }
 
-var windows = []uintptr{}
+var windows = make([]uintptr, 10, 10)
 
 func main() {
 	go systray.Run(onReady, nil)
@@ -70,8 +70,8 @@ func main() {
 func TabTo(idx int) {
 	log.Printf("TabTo: %d", idx)
 	log.Printf("%+v", windows)
-	if idx > len(windows)-1 {
-		Warning.Printf("idx %d is greater than length of windows %d", idx, len(windows))
+	if idx > cap(windows)-1 {
+		Warning.Printf("idx %d is greater than length of windows %d", idx, cap(windows))
 		return
 	}
 	hwnd := windows[idx]
@@ -83,17 +83,23 @@ func TabTo(idx int) {
 }
 func Swap(idx int) {
 	log.Printf("Swap: %d", idx)
-	if idx > len(windows) {
-		Warning.Printf("idx %d is greater than length of windows %d", idx, len(windows))
+	if idx > cap(windows)-1 {
+		Warning.Printf("idx %d is greater than length of windows %d", idx, cap(windows))
 		return
 	}
 	hwnd, _, _ := GetForegroundWindow.Call()
 	if !IsTracked(hwnd) {
 		TrackWindow(hwnd)
 	}
-	swap := windows[idx]
-	windows[idx] = hwnd
-	windows[idx] = swap
+	log.Printf("Swapping %d to %d", hwnd, idx)
+	for i := 0; i < cap(windows); i++ {
+		if windows[i] == hwnd {
+			windows[i] = windows[idx]
+			windows[idx] = hwnd
+			log.Printf("Swapped %d to %d at index %d", hwnd, idx, i)
+			break
+		}
+	}
 	log.Printf("windows swapped: %+v", windows)
 }
 
@@ -105,7 +111,13 @@ func TrackWindow(hwnd uintptr) {
 		})
 	} else {
 		log.Printf("Tracking window: %d", hwnd)
-		windows = append(windows, hwnd)
+		for i := 0; i < cap(windows); i++ {
+			if windows[i] == 0 {
+				windows[i] = hwnd
+				log.Printf("Tracked window: %d at index %d", hwnd, i)
+				return
+			}
+		}
 	}
 }
 func IsTracked(hwnd uintptr) bool {