Merge pull request #443 from mitchellh/hide-decorations-macos

macos: allow to hide decorations

macos/Sources/Features/Primary Window/PrimaryWindow.swift

@@ -19,7 +19,7 @@ class PrimaryWindow: NSWindow {
     static func create(ghostty: Ghostty.AppState, appDelegate: AppDelegate, baseConfig: ghostty_surface_config_s? = nil) -> PrimaryWindow {
         let window = PrimaryWindow(
             contentRect: NSRect(x: 0, y: 0, width: 800, height: 600),
-            styleMask: [.titled, .closable, .miniaturizable, .resizable],
+            styleMask: getStyleMask(renderDecoration: ghostty.windowDecorations),
             backing: .buffered,
             defer: false)
         window.center()
@@ -45,6 +45,15 @@ class PrimaryWindow: NSWindow {
         return window
     }
     
+    static func getStyleMask(renderDecoration: Bool) -> NSWindow.StyleMask {
+        var mask: NSWindow.StyleMask = [.resizable, .closable, .miniaturizable]
+        if renderDecoration {
+            mask.insert(.titled)
+        }
+        
+        return mask
+    }
+    
     override var canBecomeKey: Bool {
         return true
     }

macos/Sources/Ghostty/AppState.swift

@@ -63,6 +63,15 @@ extension Ghostty {
             return Info(mode: raw.build_mode, version: String(version))
         }
 
+        /// True if we want to render window decorations
+        var windowDecorations: Bool {
+            guard let config = self.config else { return true }
+            var v = false;
+            let key = "window-decoration"
+            _ = ghostty_config_get(config, &v, key, UInt(key.count))
+            return v;
+        }
+
         /// Cached clipboard string for `read_clipboard` callback.
         private var cached_clipboard_string: String? = nil
 
@@ -296,7 +305,8 @@ extension Ghostty {
             // We only support the standard clipboard
             if (location != GHOSTTY_CLIPBOARD_STANDARD) { return nil }
 
-            guard let appState = self.appState(fromSurface: userdata) else { return nil }
+            guard let surface = self.surfaceUserdata(from: userdata) else { return nil }
+            guard let appState = self.appState(fromView: surface) else { return nil }
             guard let str = NSPasteboard.general.string(forType: .string) else { return nil }
 
             // Ghostty requires we cache the string because the pointer we return has to remain
@@ -376,6 +386,17 @@ extension Ghostty {
         static func newTab(_ userdata: UnsafeMutableRawPointer?, config: ghostty_surface_config_s) {
             guard let surface = self.surfaceUserdata(from: userdata) else { return }
             
+            guard let appState = self.appState(fromView: surface) else { return }
+            guard appState.windowDecorations else {
+                let alert = NSAlert()
+                alert.messageText = "Tabs are disabled"
+                alert.informativeText = "Enable window decorations to use tabs"
+                alert.addButton(withTitle: "OK")
+                alert.alertStyle = .warning
+                _ = alert.runModal()
+                return
+            }
+
             NotificationCenter.default.post(
                 name: Notification.ghosttyNewTab,
                 object: surface,
@@ -398,9 +419,8 @@ extension Ghostty {
         }
 
         /// Returns the GhosttyState from the given userdata value.
-        static private func appState(fromSurface userdata: UnsafeMutableRawPointer?) -> AppState? {
-            let surfaceView = Unmanaged<SurfaceView>.fromOpaque(userdata!).takeUnretainedValue()
-            guard let surface = surfaceView.surface else { return nil }
+        static private func appState(fromView view: SurfaceView) -> AppState? {
+            guard let surface = view.surface else { return nil }
             guard let app = ghostty_surface_app(surface) else { return nil }
             guard let app_ud = ghostty_app_userdata(app) else { return nil }
             return Unmanaged<AppState>.fromOpaque(app_ud).takeUnretainedValue()

macos/Sources/Helpers/FullScreenHandler.swift

@@ -1,16 +1,16 @@
 import SwiftUI
 import GhosttyKit
 
-class FullScreenHandler {
-    var previousTabGroup: NSWindowTabGroup?
+class FullScreenHandler {    var previousTabGroup: NSWindowTabGroup?
     var previousTabGroupIndex: Int?
     var previousContentFrame: NSRect?
-    var isInFullscreen: Bool = false
+    var previousStyleMask: NSWindow.StyleMask? = nil
     
     // We keep track of whether we entered non-native fullscreen in case
     // a user goes to fullscreen, changes the config to disable non-native fullscreen
     // and then wants to toggle it off
     var isInNonNativeFullscreen: Bool = false
+    var isInFullscreen: Bool = false
     
     func toggleFullscreen(window: NSWindow, nonNativeFullscreen: ghostty_non_native_fullscreen_e) {
         let useNonNativeFullscreen = nonNativeFullscreen != GHOSTTY_NON_NATIVE_FULLSCREEN_FALSE
@@ -89,6 +89,7 @@ class FullScreenHandler {
         
         // This is important: it gives us the full screen, including the
         // notch area on MacBooks.
+        self.previousStyleMask = window.styleMask
         window.styleMask.remove(.titled)
         
         // Set frame to screen size, accounting for the menu bar if needed
@@ -126,8 +127,8 @@ class FullScreenHandler {
     func leaveFullscreen(window: NSWindow) {
         guard let previousFrame = previousContentFrame else { return }
         
-        // Restore title bar
-        window.styleMask.insert(.titled)
+        // Restore the style mask
+        window.styleMask = self.previousStyleMask!
         
         // Restore previous presentation options
         NSApp.presentationOptions = []

src/config/Config.zig

@@ -242,7 +242,6 @@ keybind: Keybinds = .{},
 
 /// If false, windows won't have native decorations, i.e. titlebar and
 /// borders.
-/// Currently only supported with GTK.
 @"window-decoration": bool = true,
 
 /// Whether to allow programs running in the terminal to read/write to