core/gtk: ensure that first surface gets marked as focused surface by app (#12029)

src/Surface.zig

@@ -3282,7 +3282,11 @@ pub fn focusCallback(self: *Surface, focused: bool) !void {
     crash.sentry.thread_state = self.crashThreadState();
     defer crash.sentry.thread_state = null;
 
-    // If our focus state is the same we do nothing.
+    // Always update the app focused surface, otherwise we miss
+    // the first surface created.
+    if (focused) self.app.focusSurface(self);
+
+    // If our focus state is unchanged we do nothing else.
     if (self.focused == focused) return;
     self.focused = focused;
 
@@ -3291,10 +3295,7 @@ pub fn focusCallback(self: *Surface, focused: bool) !void {
         .focus = focused,
     }, .{ .forever = {} });
 
-    if (focused) {
-        // Notify our app if we gained focus.
-        self.app.focusSurface(self);
-    } else unfocused: {
+    if (!focused) unfocused: {
         // If we lost focus and we have a keypress, then we want to send a key
         // release event for it. Depending on the apprt, this CAN result in
         // duplicate key release events, but that is better than not sending

src/apprt/gtk/class/surface.zig

@@ -2698,22 +2698,25 @@ pub const Surface = extern struct {
     }
 
     fn ecFocusEnter(_: *gtk.EventControllerFocus, self: *Self) callconv(.c) void {
+        self.updateFocus(true);
+    }
+
+    fn ecFocusLeave(_: *gtk.EventControllerFocus, self: *Self) callconv(.c) void {
+        self.updateFocus(false);
+    }
+
+    fn updateFocus(self: *Self, focused: bool) void {
         const priv = self.private();
-        priv.focused = true;
-        priv.im_context.as(gtk.IMContext).focusIn();
+        priv.focused = focused;
+
+        const ctx = priv.im_context.as(gtk.IMContext);
+        if (focused) ctx.focusIn() else ctx.focusOut();
+
         _ = glib.idleAddOnce(idleFocus, self.ref());
         self.as(gobject.Object).notifyByPspec(properties.focused.impl.param_spec);
 
         // Bell stops ringing as soon as we gain focus
-        self.setBellRinging(false);
-    }
-
-    fn ecFocusLeave(_: *gtk.EventControllerFocus, self: *Self) callconv(.c) void {
-        const priv = self.private();
-        priv.focused = false;
-        priv.im_context.as(gtk.IMContext).focusOut();
-        _ = glib.idleAddOnce(idleFocus, self.ref());
-        self.as(gobject.Object).notifyByPspec(properties.focused.impl.param_spec);
+        if (focused) self.setBellRinging(false);
     }
 
     /// The focus callback must be triggered on an idle loop source because
@@ -3406,6 +3409,8 @@ pub const Surface = extern struct {
             .{},
             null,
         );
+
+        self.updateFocus(priv.focused);
     }
 
     fn resizeOverlaySchedule(self: *Self) void {