adw: perform basic code cleanup

29 files changed, 237 insertions, 130 deletions

diff --git a/adw/src/actionrow.cpp b/adw/src/actionrow.cpp
index 8242a6e..9c33aec 100644
--- a/adw/src/actionrow.cpp
+++ b/adw/src/actionrow.cpp
@@ -1,33 +1,42 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/actionrow.hpp"
-#include "adwaitamm/private/actionrow_p.hpp"
 
 #include "adwaitamm/preferencesrow.hpp"
+#include "adwaitamm/private/actionrow_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 #include <glibmm/propertyproxy.h>
 #include <glibmm/refptr.h>
 #include <glibmm/ustring.h>
-#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/init.h>
-#include <gtkmm/listboxrow.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
 #include <gtkmm/widget.h>
 
-#include <adwaita.h>
 #include <glib-object.h>
 #include <glib.h>
-#include <gtk/gtk.h>
 
 namespace Adwaita
+
 {
   namespace
   {
     auto constinit _class = ActionRow_Class{};
+
+    namespace property_name
+    {
+      auto constexpr activatable_widget = "activatable-widget";
+      auto constexpr icon_name = "icon-name";
+      auto constexpr subtitle = "subtitle";
+      auto constexpr subtitle_lines = "subtitle-lines";
+      auto constexpr subtitle_selectable = "subtitle-selectable";
+      auto constexpr title_lines = "title-lines";
+    }  // namespace property_name
   }  // namespace
 
   auto ActionRow::get_type() -> GType
@@ -139,62 +148,62 @@ namespace Adwaita
 
   auto ActionRow::property_activatable_widget() noexcept -> Glib::PropertyProxy<Gtk::Widget *>
   {
-    return Glib::PropertyProxy<Gtk::Widget *>(this, "activatable-widget");
+    return Glib::PropertyProxy<Gtk::Widget *>(this, property_name::activatable_widget);
   }
 
   auto ActionRow::property_activatable_widget() const noexcept -> Glib::PropertyProxy_ReadOnly<Gtk::Widget *>
   {
-    return Glib::PropertyProxy_ReadOnly<Gtk::Widget *>(this, "activatable-widget");
+    return Glib::PropertyProxy_ReadOnly<Gtk::Widget *>(this, property_name::activatable_widget);
   }
 
   auto ActionRow::property_icon_name() noexcept -> Glib::PropertyProxy<Glib::ustring>
   {
-    return Glib::PropertyProxy<Glib::ustring>(this, "icon-name");
+    return Glib::PropertyProxy<Glib::ustring>(this, property_name::icon_name);
   }
 
   auto ActionRow::property_icon_name() const noexcept -> Glib::PropertyProxy_ReadOnly<Glib::ustring>
   {
-    return Glib::PropertyProxy_ReadOnly<Glib::ustring>(this, "icon-name");
+    return Glib::PropertyProxy_ReadOnly<Glib::ustring>(this, property_name::icon_name);
   }
 
   auto ActionRow::property_subtitle() noexcept -> Glib::PropertyProxy<Glib::ustring>
   {
-    return Glib::PropertyProxy<Glib::ustring>(this, "subtitle");
+    return Glib::PropertyProxy<Glib::ustring>(this, property_name::subtitle);
   }
 
   auto ActionRow::property_subtitle() const noexcept -> Glib::PropertyProxy_ReadOnly<Glib::ustring>
   {
-    return Glib::PropertyProxy_ReadOnly<Glib::ustring>(this, "subtitle");
+    return Glib::PropertyProxy_ReadOnly<Glib::ustring>(this, property_name::subtitle);
   }
 
   auto ActionRow::property_subtitle_lines() noexcept -> Glib::PropertyProxy<int>
   {
-    return Glib::PropertyProxy<int>(this, "subtitle-lines");
+    return Glib::PropertyProxy<int>(this, property_name::subtitle_lines);
   }
 
   auto ActionRow::property_subtitle_lines() const noexcept -> Glib::PropertyProxy_ReadOnly<int>
   {
-    return Glib::PropertyProxy_ReadOnly<int>(this, "subtitle-lines");
+    return Glib::PropertyProxy_ReadOnly<int>(this, property_name::subtitle_lines);
   }
 
   auto ActionRow::property_subtitle_selectable() noexcept -> Glib::PropertyProxy<bool>
   {
-    return Glib::PropertyProxy<bool>(this, "subtitle-selectable");
+    return Glib::PropertyProxy<bool>(this, property_name::subtitle_selectable);
   }
 
   auto ActionRow::property_subtitle_selectable() const noexcept -> Glib::PropertyProxy_ReadOnly<bool>
   {
-    return Glib::PropertyProxy_ReadOnly<bool>(this, "subtitle-selectable");
+    return Glib::PropertyProxy_ReadOnly<bool>(this, property_name::subtitle_selectable);
   }
 
   auto ActionRow::property_title_lines() noexcept -> Glib::PropertyProxy<int>
   {
-    return Glib::PropertyProxy<int>(this, "title-lines");
+    return Glib::PropertyProxy<int>(this, property_name::title_lines);
   }
 
   auto ActionRow::property_title_lines() const noexcept -> Glib::PropertyProxy_ReadOnly<int>
   {
-    return Glib::PropertyProxy_ReadOnly<int>(this, "title-lines");
+    return Glib::PropertyProxy_ReadOnly<int>(this, property_name::title_lines);
   }
 
 }  // namespace Adwaita
diff --git a/adw/src/alertdialog.cpp b/adw/src/alertdialog.cpp
index 24c5705..0e91e68 100644
--- a/adw/src/alertdialog.cpp
+++ b/adw/src/alertdialog.cpp
@@ -1,10 +1,15 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/alertdialog.hpp"
-#include "adwaitamm/private/alertdialog_p.hpp"
 
 #include "adwaitamm/dialog.hpp"
+#include "adwaitamm/helpers/async_callback.hpp"
+#include "adwaitamm/private/alertdialog_p.hpp"
 
-#include <glibmm/class.h>
-#include <glibmm/exceptionhandler.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 #include <glibmm/refptr.h>
@@ -15,17 +20,9 @@
 #include <giomm/asyncresult.h>
 #include <giomm/cancellable.h>
 
-#include <gtkmm/init.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
 #include <gtkmm/widget.h>
 
-#include <adwaitamm/helpers/async_callback.hpp>
-
-#include <adwaita.h>
 #include <glib-object.h>
-#include <glib.h>
-#include <gtk/gtk.h>
 
 namespace Adwaita
 {
diff --git a/adw/src/application.cpp b/adw/src/application.cpp
index 55caff5..a50d133 100644
--- a/adw/src/application.cpp
+++ b/adw/src/application.cpp
@@ -1,6 +1,12 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/application.hpp"
-#include "adwaitamm/private/application_p.hpp"
 
+#include "adwaitamm/private/application_p.hpp"
 #include "adwaitamm/wrap_init.hpp"
 
 #include <glibmm/class.h>
@@ -8,13 +14,13 @@
 #include <glibmm/objectbase.h>
 #include <glibmm/refptr.h>
 #include <glibmm/ustring.h>
+#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
 #include <giomm/application.h>
 
 #include <gtkmm/application.h>
 #include <gtkmm/init.h>
-#include <gtkmm/private/application_p.h>
 
 #include <adwaita.h>
 #include <gio/gio.h>
diff --git a/adw/src/applicationwindow.cpp b/adw/src/applicationwindow.cpp
index 50817d2..5b01cfb 100644
--- a/adw/src/applicationwindow.cpp
+++ b/adw/src/applicationwindow.cpp
@@ -1,22 +1,20 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/applicationwindow.hpp"
 
 #include "adwaitamm/private/applicationwindow_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
-#include <glibmm/refptr.h>
-#include <glibmm/ustring.h>
-#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
 #include <gtkmm/application.h>
 #include <gtkmm/applicationwindow.h>
-#include <gtkmm/init.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/applicationwindow_p.h>
 
-#include <adwaita.h>
 #include <glib-object.h>
 #include <gtk/gtk.h>
 
diff --git a/adw/src/breakpoint.cpp b/adw/src/breakpoint.cpp
index e19db41..be275e1 100644
--- a/adw/src/breakpoint.cpp
+++ b/adw/src/breakpoint.cpp
@@ -1,19 +1,21 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/breakpoint.hpp"
-#include "adwaitamm/private/breakpoint_p.hpp"
 
 #include "adwaitamm/enums.hpp"
+#include "adwaitamm/private/breakpoint_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
-#include <glibmm/private/object_p.h>
 #include <glibmm/propertyproxy.h>
 #include <glibmm/refptr.h>
 #include <glibmm/ustring.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/buildable.h>
-
 #include <glib-object.h>
 
 #include <optional>
diff --git a/adw/src/dialog.cpp b/adw/src/dialog.cpp
index 6f34d3d..c31fb8a 100644
--- a/adw/src/dialog.cpp
+++ b/adw/src/dialog.cpp
@@ -1,9 +1,14 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/dialog.hpp"
 
 #include "adwaitamm/breakpoint.hpp"
 #include "adwaitamm/private/dialog_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 #include <glibmm/refptr.h>
@@ -11,13 +16,8 @@
 #include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/init.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
-#include <gtkmm/shortcutmanager.h>
 #include <gtkmm/widget.h>
 
-#include <adwaita.h>
 #include <glib-object.h>
 #include <gtk/gtk.h>
 
diff --git a/adw/src/enums.cpp b/adw/src/enums.cpp
index 9261387..bcc8290 100644
--- a/adw/src/enums.cpp
+++ b/adw/src/enums.cpp
@@ -1,6 +1,12 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/enums.hpp"
 
-#include <adwaitamm/stylemanager.hpp>
+#include "adwaitamm/stylemanager.hpp"
 
 #include <adwaita.h>
 #include <glib-object.h>
diff --git a/adw/src/helpers/async_callback.cpp b/adw/src/helpers/async_callback.cpp
index 4f148f0..f8a8b27 100644
--- a/adw/src/helpers/async_callback.cpp
+++ b/adw/src/helpers/async_callback.cpp
@@ -1,3 +1,9 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/helpers/async_callback.hpp"
 
 #include <glibmm/exceptionhandler.h>
diff --git a/adw/src/preferencesdialog.cpp b/adw/src/preferencesdialog.cpp
index 19c9e35..3d70ed5 100644
--- a/adw/src/preferencesdialog.cpp
+++ b/adw/src/preferencesdialog.cpp
@@ -1,25 +1,20 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/preferencesdialog.hpp"
 
 #include "adwaitamm/dialog.hpp"
 #include "adwaitamm/preferencespage.hpp"
 #include "adwaitamm/private/preferencesdialog_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
-#include <glibmm/refptr.h>
-#include <glibmm/ustring.h>
-#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/init.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
-#include <gtkmm/widget.h>
-
-#include <adwaita.h>
 #include <glib-object.h>
-#include <gtk/gtk.h>
 
 namespace Adwaita
 {
diff --git a/adw/src/preferencespage.cpp b/adw/src/preferencespage.cpp
index 0c10d97..8ad9e8c 100644
--- a/adw/src/preferencespage.cpp
+++ b/adw/src/preferencespage.cpp
@@ -1,21 +1,19 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/preferencespage.hpp"
 
 #include "adwaitamm/private/preferencespage_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
-#include <glibmm/refptr.h>
-#include <glibmm/ustring.h>
-#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/init.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
 #include <gtkmm/widget.h>
 
-#include <adwaita.h>
 #include <glib-object.h>
 #include <gtk/gtk.h>
 
diff --git a/adw/src/preferencesrow.cpp b/adw/src/preferencesrow.cpp
index e54bebe..898903f 100644
--- a/adw/src/preferencesrow.cpp
+++ b/adw/src/preferencesrow.cpp
@@ -1,22 +1,21 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/preferencesrow.hpp"
 
 #include "adwaitamm/private/preferencesrow_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 #include <glibmm/propertyproxy.h>
-#include <glibmm/refptr.h>
 #include <glibmm/ustring.h>
-#include <glibmm/utility.h>
 #include <glibmm/wrap.h>
 
-#include <gtkmm/init.h>
 #include <gtkmm/listboxrow.h>
-#include <gtkmm/object.h>
-#include <gtkmm/private/listboxrow_p.h>
 
-#include <adwaita.h>
 #include <glib-object.h>
 #include <gtk/gtk.h>
 
diff --git a/adw/src/private/actionrow_p.cpp b/adw/src/private/actionrow_p.cpp
index 843c330..4a31bc8 100644
--- a/adw/src/private/actionrow_p.cpp
+++ b/adw/src/private/actionrow_p.cpp
@@ -1,7 +1,12 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/actionrow_p.hpp"
 
 #include "adwaitamm/actionrow.hpp"
-#include "adwaitamm/private/preferencesrow_p.hpp"  // IWYU pragma: keep - Required for CppClassParent::
 
 #include <glibmm/class.h>
 #include <glibmm/objectbase.h>
diff --git a/adw/src/private/alertdialog_p.cpp b/adw/src/private/alertdialog_p.cpp
index 524446f..51cba24 100644
--- a/adw/src/private/alertdialog_p.cpp
+++ b/adw/src/private/alertdialog_p.cpp
@@ -1,14 +1,17 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/alertdialog_p.hpp"
 
 #include "adwaitamm/alertdialog.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
-#include <gtkmm/shortcutmanager.h>
 
 #include <adwaita.h>
 
diff --git a/adw/src/private/application_p.cpp b/adw/src/private/application_p.cpp
index 62a0b98..5b841a0 100644
--- a/adw/src/private/application_p.cpp
+++ b/adw/src/private/application_p.cpp
@@ -1,13 +1,20 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/application_p.hpp"
 
 #include "adwaitamm/application.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 
 #include <gtkmm/private/application_p.h>
 
+#include <adwaita.h>
+
 namespace Adwaita
 {
   auto Application_Class::init() -> Glib::Class const &
diff --git a/adw/src/private/applicationwindow_p.cpp b/adw/src/private/applicationwindow_p.cpp
index b2ba636..b5d2b19 100644
--- a/adw/src/private/applicationwindow_p.cpp
+++ b/adw/src/private/applicationwindow_p.cpp
@@ -1,13 +1,20 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/applicationwindow_p.hpp"
 
 #include "adwaitamm/applicationwindow.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 
 #include <gtkmm/private/applicationwindow_p.h>
 
+#include <adwaita.h>
+
 namespace Adwaita
 {
   auto ApplicationWindow_Class::init() -> Glib::Class const &
diff --git a/adw/src/private/breakpoint_p.cpp b/adw/src/private/breakpoint_p.cpp
index 5a41a31..ed3dda6 100644
--- a/adw/src/private/breakpoint_p.cpp
+++ b/adw/src/private/breakpoint_p.cpp
@@ -1,11 +1,21 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/breakpoint_p.hpp"
 
 #include "adwaitamm/breakpoint.hpp"
 
 #include <glibmm/class.h>
 #include <glibmm/objectbase.h>
+#include <glibmm/private/object_p.h>
+
 #include <gtkmm/buildable.h>
 
+#include <adwaita.h>
+
 namespace Adwaita
 {
   auto Breakpoint_Class::init() -> Glib::Class const &
diff --git a/adw/src/private/dialog_p.cpp b/adw/src/private/dialog_p.cpp
index da19ddc..e6ac6cd 100644
--- a/adw/src/private/dialog_p.cpp
+++ b/adw/src/private/dialog_p.cpp
@@ -1,9 +1,15 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/dialog_p.hpp"
 
 #include "adwaitamm/dialog.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
+#include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
 #include <gtkmm/private/widget_p.h>
diff --git a/adw/src/private/preferencesdialog_p.cpp b/adw/src/private/preferencesdialog_p.cpp
index f114fa9..14e1aa7 100644
--- a/adw/src/private/preferencesdialog_p.cpp
+++ b/adw/src/private/preferencesdialog_p.cpp
@@ -1,14 +1,17 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/preferencesdialog_p.hpp"
 
 #include "adwaitamm/preferencesdialog.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
-#include <gtkmm/private/widget_p.h>
-#include <gtkmm/shortcutmanager.h>
 
 #include <adwaita.h>
 
diff --git a/adw/src/private/preferencespage_p.cpp b/adw/src/private/preferencespage_p.cpp
index b9d9c59..0a7cd74 100644
--- a/adw/src/private/preferencespage_p.cpp
+++ b/adw/src/private/preferencespage_p.cpp
@@ -1,9 +1,15 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/preferencespage_p.hpp"
 
 #include "adwaitamm/preferencespage.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
+#include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
 #include <gtkmm/private/widget_p.h>
diff --git a/adw/src/private/preferencesrow_p.cpp b/adw/src/private/preferencesrow_p.cpp
index fd5909e..5823d7e 100644
--- a/adw/src/private/preferencesrow_p.cpp
+++ b/adw/src/private/preferencesrow_p.cpp
@@ -1,8 +1,15 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/preferencesrow_p.hpp"
 
 #include "adwaitamm/preferencesrow.hpp"
 
 #include <glibmm/class.h>
+#include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
 #include <gtkmm/private/listboxrow_p.h>
diff --git a/adw/src/private/stylemanager_p.cpp b/adw/src/private/stylemanager_p.cpp
index f35c6da..336444a 100644
--- a/adw/src/private/stylemanager_p.cpp
+++ b/adw/src/private/stylemanager_p.cpp
@@ -1,9 +1,18 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/stylemanager_p.hpp"
 
 #include "adwaitamm/stylemanager.hpp"
 
 #include <glibmm/class.h>
 #include <glibmm/objectbase.h>
+#include <glibmm/private/object_p.h>
+
+#include <adwaita.h>
 
 namespace Adwaita
 {
diff --git a/adw/src/private/switch_row_p.cpp b/adw/src/private/switchrow_p.cpp
index 71fdf5b..0f071c4 100644
--- a/adw/src/private/switch_row_p.cpp
+++ b/adw/src/private/switchrow_p.cpp
@@ -1,4 +1,11 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/switchrow_p.hpp"
+
 #include "adwaitamm/switchrow.hpp"
 
 #include <glibmm/class.h>
@@ -7,6 +14,8 @@
 
 #include <gtkmm/object.h>
 
+#include <adwaita.h>
+
 namespace Adwaita
 {
   auto SwitchRow_Class::init() -> Glib::Class const &
diff --git a/adw/src/private/toast_p.cpp b/adw/src/private/toast_p.cpp
index 7138835..e83bc10 100644
--- a/adw/src/private/toast_p.cpp
+++ b/adw/src/private/toast_p.cpp
@@ -1,8 +1,18 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/toast_p.hpp"
 
 #include "adwaitamm/toast.hpp"
 
 #include <glibmm/class.h>
+#include <glibmm/objectbase.h>
+#include <glibmm/private/object_p.h>
+
+#include <adwaita.h>
 
 namespace Adwaita
 {
diff --git a/adw/src/private/toastoverlay_p.cpp b/adw/src/private/toastoverlay_p.cpp
index 744f981..3834a1e 100644
--- a/adw/src/private/toastoverlay_p.cpp
+++ b/adw/src/private/toastoverlay_p.cpp
@@ -1,9 +1,14 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/private/toastoverlay_p.hpp"
 
 #include "adwaitamm/toastoverlay.hpp"
 
 #include <glibmm/class.h>
-#include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 
 #include <gtkmm/object.h>
diff --git a/adw/src/stylemanager.cpp b/adw/src/stylemanager.cpp
index f62a162..c79bcbc 100644
--- a/adw/src/stylemanager.cpp
+++ b/adw/src/stylemanager.cpp
@@ -1,25 +1,24 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #include "adwaitamm/stylemanager.hpp"
-#include "adwaitamm/private/stylemanager_p.hpp"
 
 #include "adwaitamm/enums.hpp"
+#include "adwaitamm/private/stylemanager_p.hpp"
 
-#include <glibmm/class.h>
 #include <glibmm/object.h>
 #include <glibmm/objectbase.h>
 #include <glibmm/refptr.h>
 #include <glibmm/ustring.h>
 #include <glibmm/wrap.h>
 
-#include <giomm/application.h>
-
-#include <gtkmm/application.h>
-#include <gtkmm/init.h>
-#include <gtkmm/private/application_p.h>
-
-#include <adwaita.h>
 #include <gdkmm/display.h>
 #include <gdkmm/rgba.h>
-#include <gio/gio.h>
+
+#include <adwaita.h>
 #include <glib-object.h>
 
 namespace Adwaita
diff --git a/adw/src/switchrow.cpp b/adw/src/switchrow.cpp
index 010c133..e620ee6 100644
--- a/adw/src/switchrow.cpp
+++ b/adw/src/switchrow.cpp
@@ -1,19 +1,19 @@
+/**
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @copyright Copyright (c) 2025
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
 #i