apprt/gtk: Move Xkb state to App, remove un-needed fields, style changes

src/apprt/gtk/App.zig

@@ -56,6 +56,9 @@ clipboard_confirmation_window: ?*ClipboardConfirmationWindow = null,
 /// This is set to false when the main loop should exit.
 running: bool = true,
 
+/// Xkb state (X11 only). Will be null on Wayland.
+x11_xkb: ?x11.X11Xkb = null,
+
 pub fn init(core_app: *CoreApp, opts: Options) !App {
     _ = opts;
 
@@ -170,8 +173,9 @@ pub fn init(core_app: *CoreApp, opts: Options) !App {
         return error.GtkApplicationRegisterFailed;
     }
 
+    var x11_xkb: ?x11.X11Xkb = null;
     const display = c.gdk_display_get_default();
-    if (x11.x11_is_display(display)) {
+    if (x11.is_display(display)) {
         // Set the X11 window class property (WM_CLASS) if are are on an X11
         // display.
         //
@@ -197,6 +201,9 @@ pub fn init(core_app: *CoreApp, opts: Options) !App {
             "ghostty";
         c.g_set_prgname(prgname);
         c.gdk_x11_display_set_program_class(display, app_id);
+
+        // Set up Xkb
+        x11_xkb = try x11.X11Xkb.init(c.gdk_display_get_default());
     }
 
     // This just calls the "activate" signal but its part of the normal
@@ -210,6 +217,7 @@ pub fn init(core_app: *CoreApp, opts: Options) !App {
         .config = config,
         .ctx = ctx,
         .cursor_none = cursor_none,
+        .x11_xkb = x11_xkb,
         // If we are NOT the primary instance, then we never want to run.
         // This means that another instance of the GTK app is running and
         // our "activate" call above will open a window.
@@ -574,3 +582,9 @@ test "isValidAppId" {
     try testing.expect(!isValidAppId(""));
     try testing.expect(!isValidAppId("foo" ** 86));
 }
+
+/// Loads keyboard state from Xkb if there is an event pending and Xkb is
+/// loaded (X11 only). Returns null otherwise.
+pub fn modifier_state_from_xkb(self: *App, display_: ?*c.GdkDisplay) ?input.Mods {
+    return (self.x11_xkb orelse return null).modifier_state_from_notify(display_);
+}

src/apprt/gtk/Surface.zig

@@ -19,7 +19,6 @@ const Window = @import("Window.zig");
 const ClipboardConfirmationWindow = @import("ClipboardConfirmationWindow.zig");
 const inspector = @import("inspector.zig");
 const gtk_key = @import("key.zig");
-const x11 = @import("x11.zig");
 const c = @import("c.zig");
 
 const log = std.log.scoped(.gtk_surface);
@@ -254,9 +253,6 @@ im_composing: bool = false,
 im_buf: [128]u8 = undefined,
 im_len: u7 = 0,
 
-/// Xkb state (X11 only). Will be null on Wayland.
-x11_xkb: ?x11.X11Xkb = null,
-
 pub fn create(alloc: Allocator, app: *App, opts: Options) !*Surface {
     var surface = try alloc.create(Surface);
     errdefer alloc.destroy(surface);
@@ -359,9 +355,6 @@ pub fn init(self: *Surface, app: *App, opts: Options) !void {
     };
     errdefer self.* = undefined;
 
-    // Set up Xkb if we are running under X11.
-    self.x11_xkb = try x11.X11Xkb.init(c.gdk_display_get_default());
-
     // Set our default mouse shape
     try self.setMouseShape(.text);
 
@@ -1343,18 +1336,16 @@ fn keyEvent(
 
         const device = c.gdk_event_get_device(event);
         var mods = init_mods: {
-            if (self.x11_xkb) |x11_xkb| {
-                // Add any modifier state events from Xkb if we have them (X11 only).
-                if (x11_xkb.modifier_state_from_notify(display)) |xkb_mods| {
-                    break :init_mods xkb_mods;
-                }
-
-                // Null back from the Xkb call means there was no modifier
-                // event to read. This likely means that the key event did not
-                // result in a modifier change and we can safely rely on the
-                // GDK state.
+            // Add any modifier state events from Xkb if we have them (X11 only).
+            if (self.app.modifier_state_from_xkb(display)) |xkb_mods| {
+                break :init_mods xkb_mods;
             }
 
+            // Null back from the Xkb call means there was no modifier
+            // event to read. This likely means that the key event did not
+            // result in a modifier change and we can safely rely on the
+            // GDK state.
+
             break :init_mods translateMods(c.gdk_device_get_modifier_state(device));
         };
 

src/apprt/gtk/x11.zig

@@ -6,7 +6,7 @@ const input = @import("../../input.zig");
 const log = std.log.scoped(.gtk_x11);
 
 /// Returns true if the passed in display is an X11 display.
-pub fn x11_is_display(display: ?*c.GdkDisplay) bool {
+pub fn is_display(display: ?*c.GdkDisplay) bool {
     return c.g_type_check_instance_is_a(
         @ptrCast(@alignCast(display orelse return false)),
         c.gdk_x11_display_get_type(),
@@ -14,9 +14,7 @@ pub fn x11_is_display(display: ?*c.GdkDisplay) bool {
 }
 
 pub const X11Xkb = struct {
-    opcode: c_int,
     base_event_code: c_int,
-    base_error_code: c_int,
     funcs: Funcs,
 
     /// Initialize an X11Xkb struct, for the given GDK display. If the display
@@ -27,25 +25,25 @@ pub const X11Xkb = struct {
         const display = display_ orelse return null;
 
         // If the display isn't X11, then we don't need to do anything.
-        if (!x11_is_display(display)) return null;
+        if (!is_display(display)) return null;
 
         log.debug("X11Xkb.init: initializing Xkb", .{});
         const xdisplay = c.gdk_x11_display_get_xdisplay(display);
         var result: X11Xkb = .{
-            .opcode = 0,
             .base_event_code = 0,
-            .base_error_code = 0,
             .funcs = try Funcs.init(),
         };
 
         log.debug("X11Xkb.init: running XkbQueryExtension", .{});
+        var opcode: c_int = 0;
+        var base_error_code: c_int = 0;
         var major = c.XkbMajorVersion;
         var minor = c.XkbMinorVersion;
         if (result.funcs.XkbQueryExtension(
             xdisplay,
-            &result.opcode,
+            &opcode,
             &result.base_event_code,
-            &result.base_error_code,
+            &base_error_code,
             &major,
             &minor,
         ) == 0) {