feat: implement notification-based approach for toggle window decorations

macos/Sources/Features/Terminal/BaseTerminalController.swift

@@ -160,6 +160,11 @@ class BaseTerminalController: NSWindowController,
             selector: #selector(ghosttyMaximizeDidToggle(_:)),
             name: .ghosttyMaximizeDidToggle,
             object: nil)
+        center.addObserver(
+            self,
+            selector: #selector(ghosttyToggleWindowDecorations(_:)),
+            name: .ghosttyToggleWindowDecorations,
+            object: nil)
 
         // Splits
         center.addObserver(
@@ -562,6 +567,12 @@ class BaseTerminalController: NSWindowController,
         window.zoom(nil)
     }
 
+    @objc private func ghosttyToggleWindowDecorations(_ notification: Notification) {
+        guard let surfaceView = notification.object as? Ghostty.SurfaceView else { return }
+        guard surfaceTree.contains(surfaceView) else { return }
+        toggleWindowDecorations()
+    }
+
     @objc private func ghosttyDidCloseSurface(_ notification: Notification) {
         guard let target = notification.object as? Ghostty.SurfaceView else { return }
         guard let node = surfaceTree.root?.node(view: target) else { return }

macos/Sources/Ghostty/Ghostty.App.swift

@@ -1429,8 +1429,10 @@ extension Ghostty {
             case GHOSTTY_TARGET_SURFACE:
                 guard let surface = target.target.surface else { return }
                 guard let surfaceView = self.surfaceView(from: surface) else { return }
-                guard let terminalController = surfaceView.window?.windowController as? BaseTerminalController else { return }
-                terminalController.toggleWindowDecorations()
+                NotificationCenter.default.post(
+                    name: .ghosttyToggleWindowDecorations,
+                    object: surfaceView
+                )
 
             default:
                 assertionFailure()

macos/Sources/Ghostty/Package.swift

@@ -299,17 +299,17 @@ extension Ghostty {
             }
         }
     }
-    
+
     struct ClipboardContent {
         let mime: String
         let data: String
-        
+
         static func from(content: ghostty_clipboard_content_s) -> ClipboardContent? {
             guard let mimePtr = content.mime,
                   let dataPtr = content.data else {
                 return nil
             }
-            
+
             return ClipboardContent(
                 mime: String(cString: mimePtr),
                 data: String(cString: dataPtr)
@@ -406,6 +406,9 @@ extension Notification.Name {
 
     /// Focus the search field
     static let ghosttySearchFocus = Notification.Name("com.mitchellh.ghostty.searchFocus")
+
+    /// Toggle window decorations
+    static let ghosttyToggleWindowDecorations = Notification.Name("com.mitchellh.ghostty.toggleWindowDecorations")
 }
 
 // NOTE: I am moving all of these to Notification.Name extensions over time. This