diff --git a/Ice/Bridging/Bridging.swift b/Ice/Bridging/Bridging.swift
index 6bc3b589..c42abe84 100644
--- a/Ice/Bridging/Bridging.swift
+++ b/Ice/Bridging/Bridging.swift
@@ -261,36 +261,50 @@ extension Bridging {
 // MARK: - CGSSpace
 
 extension Bridging {
+    /// Options that determine the space identifiers to return in a space list.
+    enum SpaceListOption {
+        case allSpaces
+        case visibleSpaces
+    }
+
     /// The identifier of the active space.
-    static var activeSpaceID: Int {
+    static var activeSpaceID: CGSSpaceID {
         CGSGetActiveSpace(CGSMainConnectionID())
     }
 
-    /// Returns a Boolean value that indicates whether the window with the
-    /// given identifier is on the active space.
+    /// Returns an array of identifiers for the spaces containing the window with
+    /// the given identifier.
     ///
     /// - Parameter windowID: An identifier for a window.
-    static func isWindowOnActiveSpace(_ windowID: CGWindowID) -> Bool {
-        guard let spaces = CGSCopySpacesForWindows(
-            CGSMainConnectionID(),
-            CGSSpaceMask.allSpaces,
-            [windowID] as CFArray
-        ) else {
+    static func getSpaceList(for windowID: CGWindowID, option: SpaceListOption) -> [CGSSpaceID] {
+        let mask: CGSSpaceMask = switch option {
+        case .allSpaces: .allSpaces
+        case .visibleSpaces: .allVisibleSpaces
+        }
+        guard let spaces = CGSCopySpacesForWindows(CGSMainConnectionID(), mask, [windowID] as CFArray) else {
             Logger.bridging.error("CGSCopySpacesForWindows failed")
-            return false
+            return []
         }
         guard let spaceIDs = spaces.takeRetainedValue() as? [CGSSpaceID] else {
             Logger.bridging.error("CGSCopySpacesForWindows returned array of unexpected type")
-            return false
+            return []
         }
-        return Set(spaceIDs).contains(activeSpaceID)
+        return spaceIDs
+    }
+
+    /// Returns a Boolean value that indicates whether the window with the
+    /// given identifier is on the active space.
+    ///
+    /// - Parameter windowID: An identifier for a window.
+    static func isWindowOnActiveSpace(_ windowID: CGWindowID) -> Bool {
+        getSpaceList(for: windowID, option: .allSpaces).contains(activeSpaceID)
     }
 
     /// Returns a Boolean value that indicates whether the space with the given
     /// identifier is a fullscreen space.
     ///
     /// - Parameter spaceID: An identifier for a space.
-    static func isSpaceFullscreen(_ spaceID: Int) -> Bool {
+    static func isSpaceFullscreen(_ spaceID: CGSSpaceID) -> Bool {
         let type = CGSSpaceGetType(CGSMainConnectionID(), spaceID)
         return type == .fullscreen
     }