macos: use the pwd apprt action to set the proxy icon URL

macos/Sources/Features/Terminal/TerminalView.swift

@@ -50,6 +50,7 @@ struct TerminalView<ViewModel: TerminalViewModel>: View {
     // Various state values sent back up from the currently focused terminals.
     @FocusedValue(\.ghosttySurfaceView) private var focusedSurface
     @FocusedValue(\.ghosttySurfaceTitle) private var surfaceTitle
+    @FocusedValue(\.ghosttySurfacePwd) private var surfacePwd
     @FocusedValue(\.ghosttySurfaceZoomed) private var zoomedSplit
     @FocusedValue(\.ghosttySurfaceCellSize) private var cellSize
 
@@ -65,14 +66,11 @@ struct TerminalView<ViewModel: TerminalViewModel>: View {
 
         return title
     }
-    
+
-    // The proxy icon URL for our window
+    // The pwd of the focused surface as a URL
-    private var proxyIconURL: URL? {
+    private var pwdURL: URL? {
-        guard let proxyURLString = focusedSurface?.pwd else {
+        guard let surfacePwd else { return nil }
-            return nil
+        return URL(fileURLWithPath: surfacePwd)
-        }
-        // Use fileURLWithPath initializer for file paths
-        return URL(fileURLWithPath: proxyURLString)
     }
     
     var body: some View {
@@ -88,7 +86,7 @@ struct TerminalView<ViewModel: TerminalViewModel>: View {
                 if (Ghostty.info.mode == GHOSTTY_BUILD_MODE_DEBUG || Ghostty.info.mode == GHOSTTY_BUILD_MODE_RELEASE_SAFE) {
                     DebugBuildWarningView()
                 }
-                
+
                 Ghostty.TerminalSplit(node: $viewModel.surfaceTree)
                     .environmentObject(ghostty)
                     .focused($focused)
@@ -99,7 +97,7 @@ struct TerminalView<ViewModel: TerminalViewModel>: View {
                     .onChange(of: title) { newValue in
                         self.delegate?.titleDidChange(to: newValue)
                     }
-                    .onChange(of: proxyIconURL) { newValue in
+                    .onChange(of: pwdURL) { newValue in
                         self.delegate?.pwdDidChange(to: newValue)
                     }
                     .onChange(of: cellSize) { newValue in

macos/Sources/Ghostty/Ghostty.App.swift

@@ -488,6 +488,9 @@ extension Ghostty {
             case GHOSTTY_ACTION_SET_TITLE:
                 setTitle(app, target: target, v: action.action.set_title)
 
+            case GHOSTTY_ACTION_PWD:
+                pwdChanged(app, target: target, v: action.action.pwd)
+
             case GHOSTTY_ACTION_OPEN_CONFIG:
                 ghostty_config_open()
 
@@ -943,6 +946,26 @@ extension Ghostty {
             }
         }
 
+        private static func pwdChanged(
+            _ app: ghostty_app_t,
+            target: ghostty_target_s,
+            v: ghostty_action_pwd_s) {
+            switch (target.tag) {
+            case GHOSTTY_TARGET_APP:
+                Ghostty.logger.warning("pwd change does nothing with an app target")
+                return
+
+            case GHOSTTY_TARGET_SURFACE:
+                guard let surface = target.target.surface else { return }
+                guard let surfaceView = self.surfaceView(from: surface) else { return }
+                guard let pwd = String(cString: v.pwd!, encoding: .utf8) else { return }
+                surfaceView.pwd = pwd
+
+            default:
+                assertionFailure()
+            }
+        }
+
         private static func setMouseShape(
             _ app: ghostty_app_t,
             target: ghostty_target_s,

macos/Sources/Ghostty/SurfaceView.swift

@@ -92,6 +92,7 @@ extension Ghostty {
                     Surface(view: surfaceView, size: geo.size)
                         .focused($surfaceFocus)
                         .focusedValue(\.ghosttySurfaceTitle, surfaceView.title)
+                        .focusedValue(\.ghosttySurfacePwd, surfaceView.pwd)
                         .focusedValue(\.ghosttySurfaceView, surfaceView)
                         .focusedValue(\.ghosttySurfaceCellSize, surfaceView.cellSize)
                     #if canImport(AppKit)
@@ -512,9 +513,7 @@ extension FocusedValues {
     struct FocusedGhosttySurface: FocusedValueKey {
         typealias Value = Ghostty.SurfaceView
     }
-}
 
-extension FocusedValues {
     var ghosttySurfaceTitle: String? {
         get { self[FocusedGhosttySurfaceTitle.self] }
         set { self[FocusedGhosttySurfaceTitle.self] = newValue }
@@ -523,9 +522,16 @@ extension FocusedValues {
     struct FocusedGhosttySurfaceTitle: FocusedValueKey {
         typealias Value = String
     }
-}
 
-extension FocusedValues {
+    var ghosttySurfacePwd: String? {
+        get { self[FocusedGhosttySurfacePwd.self] }
+        set { self[FocusedGhosttySurfacePwd.self] = newValue }
+    }
+
+    struct FocusedGhosttySurfacePwd: FocusedValueKey {
+        typealias Value = String
+    }
+
     var ghosttySurfaceZoomed: Bool? {
         get { self[FocusedGhosttySurfaceZoomed.self] }
         set { self[FocusedGhosttySurfaceZoomed.self] = newValue }
@@ -534,9 +540,7 @@ extension FocusedValues {
     struct FocusedGhosttySurfaceZoomed: FocusedValueKey {
         typealias Value = Bool
     }
-}
 
-extension FocusedValues {
     var ghosttySurfaceCellSize: OSSize? {
         get { self[FocusedGhosttySurfaceCellSize.self] }
         set { self[FocusedGhosttySurfaceCellSize.self] = newValue }

macos/Sources/Ghostty/SurfaceView_AppKit.swift

@@ -14,6 +14,10 @@ extension Ghostty {
         // to the app level and it is set from there.
         @Published var title: String = "👻"
 
+        // The current pwd of the surface as defined by the pty. This can be
+        // changed with escape codes.
+        @Published var pwd: String? = nil
+
         // The cell size of this surface. This is set by the core when the
         // surface is first created and any time the cell size changes (i.e.
         // when the font size changes). This is used to allow windows to be
@@ -71,17 +75,6 @@ extension Ghostty {
             return ghostty_surface_needs_confirm_quit(surface)
         }
 
-        /// Returns the pwd of the surface if it has one.
-        var pwd: String? {
-            guard let surface = self.surface else { return nil }
-            let v = String(unsafeUninitializedCapacity: 1024) {
-                Int(ghostty_surface_pwd(surface, $0.baseAddress, UInt($0.count)))
-            }
-
-            if (v.count == 0) { return nil }
-            return v
-        }
-
         // Returns the inspector instance for this surface, or nil if the
         // surface has been closed.
         var inspector: ghostty_inspector_t? {