noCSD for GTK4

tux_99 · 2025-06-29 21:00:29

I'm currently experimenting with a Devuan XFCE (Excalibur) installation in a VM, I noticed that the gtk3-nocsd packages were installed automatically and they seem to work fine with gtk3 applications.

$ apt list |grep nocsd
gtk3-nocsd/testing,now 3-2 all [installed,automatic]
libgtk3-nocsd0/testing,now 3-2 amd64 [installed,automatic]

But unfortunately this library has no effect on gtk4 applications (I tested for example Ghex) so I did a quick search and found that Ubuntu ships a modified version of gtk3-nocsd that is supposed to also work for gtk4:

https://bugs.launchpad.net/ubuntu/+sour … ug/1946161

This bug was fixed in the package gtk3-nocsd - 3-1ubuntu2
---------------
gtk3-nocsd (3-1ubuntu2) kinetic; urgency=medium
* debian/patches/add-gtk4-support.patch:
- Add Gtk4 Support.
- Fix logic error in gtk_window_set_titlebar.
(LP: #1946161)
-- Brett Bogert <email address hidden> Thu, 01 Sep 2022 06:28:38 -0500
Changed in gtk3-nocsd (Ubuntu):
status: New → Fix Released

https://launchpad.net/ubuntu/+source/gtk3-nocsd

Is this patched version of gtk3-nocsd with gtk4 support available already somewhere for devuan exacalibur or will I have to build it myself from sources?

Does anybody have any experience with this patched version, does it reliably remove CSD in GTK4 apps without unwanted side effects?

Last edited by tux_99 (2025-06-29 21:02:55)

golinux · 2025-06-29 21:15:38

This is the first I've heard about this patch . . . that I can remember. Perhaps someone will test it in Devuan and make it available for Devuan. Possibly you?

igorzwx · 2025-06-29 21:18:49

You may try to build from Debian sources (e.g. unstable)
_https://tracker.debian.org/pkg/gtk3-nocsd
_https://packages.debian.org/source/unstable/gtk3-nocsd

Example: _https://dev1galaxy.org/viewtopic.php?id=7179

You may also try to build from Ubuntu sources.
All sorts of examples are available here:
_https://dev1galaxy.org/viewforum.php?id=25

It makes sense to start from Debian sources to get all the Build-Deps you need.

You may also try to build it from git
_https://aur.archlinux.org/packages/gtk3-nocsd-git
_https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=gtk3-nocsd-git

Luckily, with gtk3-nocsd, we still have a way to (partially) turn it off.
_https://github.com/ZaWertun/gtk3-nocsd

It may mean that it may not always work.

Last edited by igorzwx (2025-06-29 22:09:49)

tux_99 · 2025-06-29 23:08:19

Ok, I will try to build the Ubuntu package for Devuan Excalibur and report my findings but I will first have to figure out how to do this so it might take some time, as I'm a complete beginner with regards to building packages on Debian/Devuan (my experience of the last 30 years with Linux has been almost exclusively with various RPM based distros and more recently some Arch based distros).

greenjeans · 2025-06-30 00:18:56

@tux_99, Dude! That's hot stuff, nice find!! Exactly the kind of thing we need.

igorzwx · 2025-06-30 00:25:52

The available Build-Deps for gtk3-nocsd can be installed with "apt build-dep"

apt build-dep gtk3-nocsd --simulate

sudo apt build-dep gtk3-nocsd

If you are "a complete beginner", you may better try to reproduce my experiments.

Last edited by igorzwx (2025-06-30 00:31:17)

steve_v · 2025-06-30 01:20:07

Debian instructions wrt porting packages also apply to devuan, e.g. https://wiki.debian.org/CreatePackageFromPPA

igorzwx · 2025-06-30 02:04:39

Thanks!

➤ dget --extract --allow-unauthenticated https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/gtk3-nocsd/3-1ubuntu3/gtk3-nocsd_3-1ubuntu3.dsc
dget: retrieving https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/gtk3-nocsd/3-1ubuntu3/gtk3-nocsd_3-1ubuntu3.dsc
...
dpkg-source: info: extracting gtk3-nocsd in gtk3-nocsd-3
dpkg-source: info: unpacking gtk3-nocsd_3.orig.tar.gz
dpkg-source: info: unpacking gtk3-nocsd_3-1ubuntu3.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying debian-specifics-in-manpage.patch
dpkg-source: info: applying add-gtk4-support.patch

➤ ls -1
gtk3-nocsd-3
gtk3-nocsd_3-1ubuntu3.debian.tar.xz
gtk3-nocsd_3-1ubuntu3.dsc
gtk3-nocsd_3.orig.tar.gz

➤ ls -1 gtk3-nocsd-3/debian/patches
add-gtk4-support.patch
debian-specifics-in-manpage.patch
series

➤ cat gtk3-nocsd-3/debian/patches/add-gtk4-support.patch
Description: add some description: Add Gtk4 Support
Imported new upstream version 4 and fixed logic error in gtk_window_set_titlebar
Imported from https://github.com/ZaWertun/gtk3-nocsd
Author: Brett Bogert <bbogert24@gmail.com>
Bug: https://bugs.launchpad.net/ubuntu/+source/gtk3-nocsd/+bug/1946161
--- a/gtk3-nocsd.c
+++ b/gtk3-nocsd.c
@@ -22,6 +22,7 @@
 
 #define _GNU_SOURCE
 #include <dlfcn.h>
+#include <link.h>
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
@@ -38,6 +39,16 @@
 
 #include <gobject/gvaluecollector.h>
 
+#ifdef __FreeBSD__
+#include <sys/elf_generic.h>
+#define ElfW(t) Elf##_##t
+#endif
+
+#ifdef G_TYPE_INSTANCE_GET_PRIVATE
+#   undef G_TYPE_INSTANCE_GET_PRIVATE
+#endif
+#define G_TYPE_INSTANCE_GET_PRIVATE(instance, g_type, c_type)   ((c_type*) g_type_instance_get_private ((GTypeInstance*) (instance),(g_type)))
+
 typedef void (*gtk_window_buildable_add_child_t) (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *type);
 typedef GObject* (*gtk_dialog_constructor_t) (GType type, guint n_construct_properties, GObjectConstructParam *construct_params);
 typedef char *(*gtk_check_version_t) (guint required_major, guint required_minor, guint required_micro);
@@ -111,12 +122,17 @@ static void * volatile library_handles[N
 static pthread_key_t key_tls;
 static pthread_once_t key_tls_once = PTHREAD_ONCE_INIT;
 
+/* Marking both as volatile here saves the trouble of caring about
+ * memory barriers. */
+static volatile gboolean is_compatible_gtk_version_cached = FALSE;
+static volatile gboolean is_compatible_gtk_version_checked = FALSE;
+static volatile int gtk2_active;
+
 typedef struct gtk3_nocsd_tls_data_t {
   // When set to true, this override gdk_screen_is_composited() and let it
   // return FALSE temporarily. Then, client-side decoration (CSD) cannot be initialized.
   volatile int disable_composite;
   volatile int signal_capture_handler;
-  volatile int fake_global_decoration_layout;
   volatile int in_info_collect;
   const char *volatile  signal_capture_name;
   volatile gpointer signal_capture_instance;
@@ -140,6 +156,12 @@ static void *find_orig_function(int try_
     void *handle;
     void *symptr;
 
+    /* Ok, so in case both gtk2 + gtk3 are loaded, but we are using
+     * gtk2, we don't know what RTLD_NEXT is going to choose - so we
+     * must explicitly pick up the gtk2 versions... */
+    if (try_gtk2 && gtk2_active)
+        goto try_gtk2_version;
+
     /* This will work in most cases, and is completely thread-safe. */
     handle = dlsym(RTLD_NEXT, symbol);
     if (handle)
@@ -248,10 +270,12 @@ RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY,
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_header_bar_set_show_close_button, void, (GtkHeaderBar *bar, gboolean setting), (bar, setting))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_header_bar_set_decoration_layout, void, (GtkHeaderBar *bar, const gchar *layout), (bar, layout))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_header_bar_get_decoration_layout, const gchar *, (GtkHeaderBar *bar), (bar))
+RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_header_bar_get_custom_title, GtkWidget *, (GtkHeaderBar *bar), (bar))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_style_context_add_class, void, (GtkStyleContext *context, const gchar *class_name), (context, class_name))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_style_context_remove_class, void, (GtkStyleContext *context, const gchar *class_name), (context, class_name))
-RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_style_context_add_provider, void, (GtkStyleContext *context, GtkStyleProvider *provider, guint priority), (context, provider, priority))
+RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_style_context_add_provider_for_screen, void, (GdkScreen *screen, GtkStyleProvider *provider, guint priority), (screen, provider, priority))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_style_provider_get_type, GType, (), ())
+RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_hide, void, (GtkWidget *widget), (widget))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_destroy, void, (GtkWidget *widget), (widget))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_get_mapped, gboolean, (GtkWidget *widget), (widget))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_get_realized, gboolean, (GtkWidget *widget), (widget))
@@ -262,6 +286,7 @@ RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY,
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_realize, void, (GtkWidget *widget), (widget))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_get_settings, GtkSettings *, (GtkWidget *widget), (widget))
 RUNTIME_IMPORT_FUNCTION(0, GTK_LIBRARY, gtk_widget_get_toplevel, GtkWidget *, (GtkWidget *widget), (widget))
+RUNTIME_IMPORT_FUNCTION(0, GDK_LIBRARY, gdk_screen_get_default, GdkScreen *, (), ())
 RUNTIME_IMPORT_FUNCTION(0, GDK_LIBRARY, gdk_window_get_user_data, void, (GdkWindow *window, gpointer *data), (window, data))
 RUNTIME_IMPORT_FUNCTION(1, GDK_LIBRARY, gdk_screen_is_composited, gboolean, (GdkScreen *screen), (screen))
 RUNTIME_IMPORT_FUNCTION(1, GDK_LIBRARY, gdk_window_set_decorations, void, (GdkWindow *window, GdkWMDecoration decorations), (window, decorations))
@@ -287,6 +312,7 @@ RUNTIME_IMPORT_FUNCTION(0, GOBJECT_LIBRA
 RUNTIME_IMPORT_FUNCTION(0, GOBJECT_LIBRARY, g_value_unset, void, (GValue *value), (value))
 RUNTIME_IMPORT_FUNCTION(0, GOBJECT_LIBRARY, g_value_get_string, const gchar *, (const GValue *value), (value))
 RUNTIME_IMPORT_FUNCTION(0, GOBJECT_LIBRARY, g_value_get_boolean, gboolean, (const GValue *value), (value))
+RUNTIME_IMPORT_FUNCTION(0, GOBJECT_LIBRARY, g_type_name, const gchar *, (GType type), (type))
 RUNTIME_IMPORT_FUNCTION(0, GLIB_LIBRARY, g_getenv, gchar *, (const char *name), (name))
 RUNTIME_IMPORT_FUNCTION(0, GLIB_LIBRARY, g_logv, void, (const gchar *log_domain, GLogLevelFlags log_level, const gchar *format, va_list args), (log_domain, log_level, format, args))
 RUNTIME_IMPORT_FUNCTION(0, GLIB_LIBRARY, g_free, void, (gpointer mem), (mem))
@@ -314,10 +340,12 @@ RUNTIME_IMPORT_FUNCTION(0, GIREPOSITORY_
 #define orig_gtk_header_bar_set_show_close_button        rtlookup_gtk_header_bar_set_show_close_button
 #define orig_gtk_header_bar_set_decoration_layout        rtlookup_gtk_header_bar_set_decoration_layout
 #define orig_gtk_header_bar_get_decoration_layout        rtlookup_gtk_header_bar_get_decoration_layout
+#define gtk_header_bar_get_custom_title                  rtlookup_gtk_header_bar_get_custom_title
 #define gtk_style_context_add_class                      rtlookup_gtk_style_context_add_class
 #define gtk_style_context_remove_class                   rtlookup_gtk_style_context_remove_class
-#define gtk_style_context_add_provider                   rtlookup_gtk_style_context_add_provider
+#define gtk_style_context_add_provider_for_screen        rtlookup_gtk_style_context_add_provider_for_screen
 #define gtk_style_provider_get_type                      rtlookup_gtk_style_provider_get_type
+#define gtk_widget_hide                                  rtlookup_gtk_widget_hide
 #define gtk_widget_destroy                               rtlookup_gtk_widget_destroy
 #define gtk_widget_get_mapped                            rtlookup_gtk_widget_get_mapped
 #define gtk_widget_get_realized                          rtlookup_gtk_widget_get_realized
@@ -326,9 +354,11 @@ RUNTIME_IMPORT_FUNCTION(0, GIREPOSITORY_
 #define gtk_widget_set_parent                            rtlookup_gtk_widget_set_parent
 #define gtk_widget_unrealize                             rtlookup_gtk_widget_unrealize
 #define gtk_widget_realize                               rtlookup_gtk_widget_realize
+#define gdk_screen_get_default                           rtlookup_gdk_screen_get_default
 #define gdk_window_get_user_data                         rtlookup_gdk_window_get_user_data
 #define orig_gdk_screen_is_composited                    rtlookup_gdk_screen_is_composited
 #define orig_gdk_window_set_decorations                  rtlookup_gdk_window_set_decorations
+#define g_list_free                                      rtlookup_g_list_free
 #define g_object_get_data                                rtlookup_g_object_get_data
 #define g_object_set_data                                rtlookup_g_object_set_data
 #define g_type_check_class_cast                          rtlookup_g_type_check_class_cast
@@ -337,12 +367,16 @@ RUNTIME_IMPORT_FUNCTION(0, GIREPOSITORY_
 #define g_object_class_find_property                     rtlookup_g_object_class_find_property
 #define g_object_get_valist                              rtlookup_g_object_get_valist
 #define g_object_get_property                            rtlookup_g_object_get_property
+#ifdef g_object_ref
+#  undef g_object_ref
+#endif
 #define g_object_ref                                     rtlookup_g_object_ref
 #define g_object_unref                                   rtlookup_g_object_unref
 #define g_value_init                                     rtlookup_g_value_init
 #define g_value_unset                                    rtlookup_g_value_unset
 #define g_value_get_string                               rtlookup_g_value_get_string
 #define g_value_get_boolean                              rtlookup_g_value_get_boolean
+#define g_type_name                                      rtlookup_g_type_name
 #define orig_g_type_register_static_simple               rtlookup_g_type_register_static_simple
 #define orig_g_type_add_interface_static                 rtlookup_g_type_add_interface_static
 #define orig_g_type_add_instance_private                 rtlookup_g_type_add_instance_private
@@ -374,7 +408,43 @@ static void static_g_log(const gchar *lo
     va_end (args);
 }
 
-static gboolean is_gtk_version_larger_or_equal(guint major, guint minor, guint micro) {
+int check_gtk2_callback(struct dl_phdr_info *info, size_t size, void *pointer)
+{
+    ElfW(Half) n;
+
+    if (G_UNLIKELY(strstr(info->dlpi_name, GDK_LIBRARY_SONAME_V2))) {
+        for (n = 0; n < info->dlpi_phnum; n++) {
+            uintptr_t start = (uintptr_t) (info->dlpi_addr + info->dlpi_phdr[n].p_vaddr);
+            uintptr_t end   = start + (uintptr_t) info->dlpi_phdr[n].p_memsz;
+            if ((uintptr_t) pointer >= start && (uintptr_t) pointer < end) {
+                gtk2_active = 1;
+                /* The gtk version check could have already been cached
+                 * before we were able to determine that gtk2 is in
+                 * use, so force this to FALSE. (Regardless of  the
+                 * _checked value.) */
+                is_compatible_gtk_version_cached = FALSE;
+                return 0;
+            }
+        }
+    }
+    return 0;
+}
+
+static void detect_gtk2(void *pointer)
+{
+    if (gtk2_active)
+        return;
+    /* There is a corner case where a program with plugins loads
+     * multiple plugins, some of which are linked against gtk2, while
+     * others are linked against gtk3. If the gtk2 plugins are used,
+     * this causes problems if we detect gtk3 just on the fact of
+     * whether gtk3 is loaded. Hence we iterate over all loaded
+     * libraries and if the pointer passed to us is within the memory
+     * region of gtk2, we set a global flag. */
+    dl_iterate_phdr(check_gtk2_callback, pointer);
+}
+
+static gboolean is_gtk_version_larger_or_equal2(guint major, guint minor, guint micro, int* gtk_loaded) {
     static gtk_check_version_t orig_func = NULL;
     if(!orig_func)
         orig_func = (gtk_check_version_t)find_orig_function(0, GTK_LIBRARY, "gtk_check_version");
@@ -388,9 +458,19 @@ static gboolean is_gtk_version_larger_or
      * will give us a reference to gtk_check_version. But since
      * that symbol is compatible with gtk3, this doesn't hurt.
      */
-     if (orig_func)
+     if (orig_func) {
+         if (gtk_loaded)
+             *gtk_loaded = TRUE;
         return (orig_func(major, minor, micro) == NULL);
-    return FALSE;
+     } else {
+         if (gtk_loaded)
+             *gtk_loaded = FALSE;
+        return FALSE;
+     }
+}
+
+static gboolean is_gtk_version_larger_or_equal(guint major, guint minor, guint micro) {
+    return is_gtk_version_larger_or_equal2(major, minor, micro, NULL);
 }
 
 static gboolean are_csd_disabled() {
@@ -404,22 +484,27 @@ static gboolean are_csd_disabled() {
 }
 
 static gboolean is_compatible_gtk_version() {
-    /* Marking both as volatile here saves the trouble of caring about
-     * memory barriers. */
-    static volatile gboolean checked = FALSE;
-    static volatile gboolean compatible = FALSE;
+    int gtk_loaded = FALSE;
 
-    if(G_UNLIKELY(!checked)) {
-        if (!is_gtk_version_larger_or_equal(3, 10, 0)) {
+    if(G_UNLIKELY(!is_compatible_gtk_version_checked)) {
+        if (gtk2_active) {
+            is_compatible_gtk_version_cached = FALSE;
+	} else if (!is_gtk_version_larger_or_equal2(3, 10, 0, &gtk_loaded)) {
             /* CSD was introduced there */
-            compatible = FALSE;
+            is_compatible_gtk_version_cached = FALSE;
         } else {
-            compatible = TRUE;
+            is_compatible_gtk_version_cached = TRUE;
         }
-        checked = TRUE;
+        /* If in a dynamical program (e.g. using python-gi) Glib is loaded before
+         * Gtk, then the Gtk version check is executed before Gtk is even loaded,
+         * returning FALSE and caching it. This will not disable CSD if Gtk is
+         * loaded later. To circumvent this, cache the value only if we know that
+         * Gtk is loaded. */
+        if (gtk_loaded)
+            is_compatible_gtk_version_checked = TRUE;
     }
 
-    return compatible;
+    return is_compatible_gtk_version_cached;
 }
 
 static void set_has_custom_title(GtkWindow* window, gboolean set) {
@@ -479,11 +564,18 @@ static GtkStyleProvider *get_custom_css_
       "  border-color: transparent;\n"
       "}\n"
       ".background:not(.tiled):not(.maximized) .titlebar:backdrop,\n"
-      ".background:not(.tiled):not(.maximized) .titlebar {\n"
+      ".background:not(.tiled):not(.maximized) .titlebar,"
+      ".background:not(.tiled):not(.maximized) .titlebar headerbar {\n"
       "  border-top-left-radius: 0;\n"
       "  border-top-right-radius: 0;\n"
-      "}\n"
-      "";
+      "}\n";
+    static int title_skipped = 0;
+
+    const char* env_show_header = getenv("GTK3NOCSD_SHOW_HEADER");
+    if (env_show_header && !strncmp(env_show_header, "1", 2) && !title_skipped) {
+        custom_css += 39; // skip CSS rule that hides title
+        title_skipped = 1;
+    }
 
     if (G_UNLIKELY (provider == NULL)) {
         GtkCssProvider *new_provider;
@@ -507,16 +599,15 @@ static GtkStyleProvider *get_custom_css_
 
 static void add_custom_css (GtkWidget *widget)
 {
-    GtkStyleContext *context = gtk_widget_get_style_context (widget);
     GtkStyleProvider *my_provider = get_custom_css_provider ();
-
-    if (!context || !my_provider)
+    if (!my_provider)
         return;
 
     /* Use a higher priority than SETTINGS, but lower than APPLICATION.
      * add_provider will make sure a given provider is not added twice.
      */
-    gtk_style_context_add_provider (context, my_provider, GTK_STYLE_PROVIDER_PRIORITY_SETTINGS + 50);
+    GdkScreen *screen = gdk_screen_get_default ();
+    gtk_style_context_add_provider_for_screen (screen, my_provider, GTK_STYLE_PROVIDER_PRIORITY_SETTINGS + 50);
 }
 
 // This API exists since gtk+ 3.10
@@ -554,12 +645,6 @@ extern void gtk_window_set_titlebar (Gtk
             }
         }
 
-        /* Remove any potential old title bar. We can't call
-         * the static unset_titlebar() directly (not available),
-         * so we call the full function; that shouldn't have
-         * any side effects. */
-        orig_gtk_window_set_titlebar (window, NULL);
-
         /* The solid-csd class is not removed when the titlebar
          * is unset in Gtk (it's probably a bug), so unset it
          * here explicitly, in case it's set. */
@@ -577,6 +662,13 @@ extern void gtk_window_set_titlebar (Gtk
             g_signal_connect (titlebar, "notify::title",
                         G_CALLBACK (private_info.on_titlebar_title_notify), window);
             private_info.on_titlebar_title_notify (GTK_HEADER_BAR (titlebar), NULL, window);
+
+            /* Hiding GtkHeaderBar when custom title wasn't set (only for GtkDialog windows) */
+            const GtkWidget* custom = gtk_header_bar_get_custom_title(GTK_HEADER_BAR (titlebar));
+            const gchar* window_type = G_OBJECT_TYPE_NAME(window);
+            if (custom == NULL && strcmp(window_type, "GtkDialog")) {
+                gtk_widget_hide(GTK_WIDGET (titlebar));
+            }
         }
 
         gtk_style_context_add_class (gtk_widget_get_style_context (titlebar),
@@ -665,14 +757,10 @@ static void _gtk_header_bar_update_windo
         r = _remove_buttons_from_layout (new_layout, *decoration_layout_ptr);
         if (r == 0)
             *decoration_layout_ptr = new_layout;
-    } else {
-        TLSD->fake_global_decoration_layout = 1;
     }
     info.update_window_buttons (bar);
     if (*decoration_layout_ptr) {
         *decoration_layout_ptr = orig_layout;
-    } else {
-        TLSD->fake_global_decoration_layout = 0;
     }
 }
 
@@ -725,7 +813,7 @@ extern void g_object_get (gpointer _obje
      * g_object_get(). */
 
     va_start (var_args, first_property_name);
-    if (G_UNLIKELY (TLSD->fake_global_decoration_layout)) {
+    if (are_csd_disabled()) {
         name = first_property_name;
         while (name) {
             GValue value = G_VALUE_INIT;
@@ -746,6 +834,10 @@ extern void g_object_get (gpointer _obje
                 if (r == 0)
                     s = new_layout;
                 *v = g_strdup (s);
+            } else if (G_UNLIKELY (strcmp (name, "gtk-dialogs-use-header") == 0)) {
+                gboolean *v = va_arg (var_args, gboolean *);
+                // Save dialog will break if this prop has been set to TRUE (see #13)
+                *v = FALSE;
             } else {
                 G_VALUE_LCOPY (&value, var_args, 0, &error);
                 if (error) {
@@ -789,6 +881,11 @@ extern void gtk_header_bar_set_decoratio
     }
 }
 
+extern gboolean gtk_window_get_decorated (GtkWindow *window)
+{
+    return FALSE;
+}
+
 extern gboolean gdk_screen_is_composited (GdkScreen *screen) {
     /* With Gtk+3 3.16.1+ we reimplement gtk_window_set_titlebar ourselves, hence
      * we don't want to re-use the compositing hack, especially since it causes
@@ -1006,6 +1103,7 @@ GType g_type_register_static_simple (GTy
         if(type_name && G_UNLIKELY(strcmp(type_name, "GtkWindow") == 0)) {
             // override GtkWindowClass
             orig_gtk_window_class_init = class_init;
+            detect_gtk2((void *) class_init);
             if(is_compatible_gtk_version() && are_csd_disabled()) {
                 class_init = (GClassInitFunc)fake_gtk_window_class_init;
                 save_type = &gtk_window_type;
@@ -1018,6 +1116,7 @@ GType g_type_register_static_simple (GTy
         if(type_name && G_UNLIKELY(strcmp(type_name, "GtkDialog") == 0)) {
             // override GtkDialogClass
             orig_gtk_dialog_class_init = class_init;
+            detect_gtk2((void *) class_init);
             if(is_compatible_gtk_version() && are_csd_disabled()) {
                 class_init = (GClassInitFunc)fake_gtk_dialog_class_init;
                 save_type = &gtk_dialog_type;
@@ -1030,6 +1129,7 @@ GType g_type_register_static_simple (GTy
         if(type_name && G_UNLIKELY(strcmp(type_name, "GtkHeaderBar") == 0)) {
             // override GtkHeaderBarClass
             orig_gtk_header_bar_class_init = class_init;
+            detect_gtk2((void *) class_init);
             if(is_compatible_gtk_version() && are_csd_disabled()) {
                 class_init = (GClassInitFunc)fake_gtk_header_bar_class_init;
                 save_type = &gtk_header_bar_type;
@@ -1042,6 +1142,7 @@ GType g_type_register_static_simple (GTy
         if(type_name && G_UNLIKELY(strcmp(type_name, "GtkShortcutsWindow") == 0)) {
             // override GtkShortcutsWindowClass
             orig_gtk_shortcuts_window_init = instance_init;
+            detect_gtk2((void *) instance_init);
             if(is_compatible_gtk_version() && are_csd_disabled()) {
                 instance_init = (GInstanceInitFunc) fake_gtk_shortcuts_window_init;
                 goto out;
@@ -1095,6 +1196,9 @@ static void fake_gtk_dialog_buildable_in
 }
 
 void g_type_add_interface_static (GType instance_type, GType interface_type, const GInterfaceInfo *info) {
+    if (info && info->interface_init)
+        detect_gtk2((void *) info->interface_init);
+
     if(is_compatible_gtk_version() && are_csd_disabled() && (instance_type == gtk_window_type || instance_type == gtk_dialog_type)) {
         if(interface_type == GTK_TYPE_BUILDABLE) {
             // register GtkBuildable interface for GtkWindow/GtkDialog class
@@ -1248,7 +1352,7 @@ out:
 
 static gtk_header_bar_private_info_t gtk_header_bar_private_info ()
 {
-    static volatile gtk_header_bar_private_info_t info = { (gsize) -1, NULL };
+    static volatile gtk_header_bar_private_info_t info = { (gsize) -1, NULL, NULL };
     if (G_UNLIKELY (info.decoration_layout_offset == (gsize) -1)) {
         /* Was only introduced in Gtk+3 >= 3.12. Unlikely that someone is
          * still using such an old version, but be safe nevertheless. */

Since the patch is rather old, it may work with an old source, e.g. that of Excalibur.

Last edited by igorzwx (2025-06-30 02:23:44)

igorzwx · 2025-06-30 13:00:59

You may try something like this:

On Excalibur

Install the Build-Deps

sudo apt build-dep gtk3-nocsd

mkdir BUILD
cd BUILD

Copy the patch into BUILD

$ ls
add-gtk4-support.patch

Download the source into BUILD

apt source gtk3-nocsd

$ ls -1
add-gtk4-support.patch
gtk3-nocsd-<version>  # it is the sourcedir 
...

cd to the sourcedir

cd gtk3-nocsd-*

Apply the patch

patch -Np1 -i ../add-gtk4-support.patch --verbose

_https://www.man7.org/linux/man-pages/man1/patch.1.html

Build the deb package

dpkg-buildpackage -us -uc -b

cd ..
ls -1 *.deb

EDIT:

It works on Devuan 5 Daedalus

 ➤ inxi -b | grep Host -A1
  Host: devuan Kernel: 6.1.0-37-amd64 arch: x86_64 bits: 64 Desktop: MATE
    v: 1.26.0 Distro: Devuan GNU/Linux 5 (daedalus)

➤ cd gtk3-nocsd-*

➤ patch -Np1 -i ../add-gtk4-support.patch
patching file gtk3-nocsd.c

➤ dpkg-buildpackage -us -uc -b

➤ ls -1 ../*.deb
../gtk3-nocsd_3-1_all.deb
../libgtk3-nocsd0_3-1_amd64.deb
../libgtk3-nocsd0-dbgsym_3-1_amd64.deb

greenjeans and other Neo-Luddites may try to patch and rebuild gtk3-nocsd.
Although, of course, it might be difficult to follow the instruction (because of dementia, perhaps).

It might be a test for diagnosing dementia.

Last edited by igorzwx (2025-06-30 14:34:51)

greenjeans · 2025-06-30 14:32:11

(deleted by me)

Last edited by greenjeans (2025-06-30 19:24:56)

igorzwx · 2025-06-30 15:04:05

@greenjeans

Have you already forgotten what you said today? (02:18:56)

greenjeans wrote:

@tux_99, Dude! That's hot stuff, nice find!! Exactly the kind of thing we need.

greenjeans · 2025-06-30 15:28:53

(deleted by me)

Last edited by greenjeans (2025-06-30 19:25:13)

igorzwx · 2025-06-30 16:13:22

Are you going to compile it or not?

greenjeans · 2025-06-30 16:37:52

(deleted by me)

Last edited by greenjeans (2025-06-30 19:25:33)

igorzwx · 2025-06-30 16:48:49

If you really want to learn something, you may try to reproduce my experiments.
If you need a ready package, you may ask stopAI.
He had already compiled everything
_https://dev1galaxy.org/viewtopic.php?pid=55960#p55960

Last edited by igorzwx (2025-06-30 16:49:13)

greenjeans · 2025-06-30 17:50:09

(deleted by me, I let myself fall victim to a troll, sorry to the OP and others for posts that have nothing to do with the topic)

Last edited by greenjeans (2025-06-30 19:26:38)

igorzwx · 2025-06-30 19:06:49

Do you remember an old story of fox and the grapes?
_https://en.wikipedia.org/wiki/The_Fox_and_the_Grapes

golinux · 2025-06-30 19:26:45

Please take a deep breath and stop poking at each other . . .

tux_99 · Yesterday 00:32:35

Ok this is what I did to build the package (after reading the instructions from Igor and on the debian site):

mkdir gtk3-nocsd
cd gtk3-nocsd
dget --extract --allow-unauthenticated  https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/gtk3-nocsd/3-1ubuntu3/gtk3-nocsd_3-1ubuntu3.dsc
sudo apt build-dep gtk3-nocsd
sudo apt install markdown
cd gtk3-nocsd-3
dpkg-buildpackage --build=binary --no-sign
cd ..

these are the binary packages that got created:

ls -la *.deb
-rw-r--r-- 1 user user 47416 Jul  1 01:16 gtk3-nocsd_3-1ubuntu3_all.deb
-rw-r--r-- 1 user user 56524 Jul  1 01:16 libgtk3-nocsd0-dbgsym_3-1ubuntu3_amd64.deb
-rw-r--r-- 1 user user 16232 Jul  1 01:16 libgtk3-nocsd0_3-1ubuntu3_amd64.deb

To replace the standard Devuan packages with the freshly built ones I ran:

sudo apt remove gtk3-nocsd libgtk3-nocsd0
sudo dpkg -i gtk3-nocsd_3-1ubuntu3_all.deb libgtk3-nocsd0_3-1ubuntu3_amd64.deb

This how Ghex (a gtk4 app) looks like with the standard Devuan gtk3-nocsd packages:
http://pkgrepo.linuxtech.net/files/Ghex-original.png

And this is how it looks like with the packages rebuilt from Ubuntu sources:
http://pkgrepo.linuxtech.net/files/Ghex … -nocsd.png

Unfortunately the result is not what I hoped for, the Ubuntu sourced gtk3-nocsd packages simply remove the CSD (i.e. the program icon on the left and the three windowbar icons on the right) but the SSD doesn't get added, Does anyone know what needs to be done to add the SSD?

BTW, is there no way to attach images to a post on this forum?

Last edited by tux_99 (Yesterday 00:34:52)

igorzwx · Yesterday 01:04:31

The so-called Ubuntu sources are Debian sources with (or without) Ubuntu patches.

Last edited by igorzwx (Yesterday 01:31:47)

tux_99 · Yesterday 01:34:51

Yes, I'm well aware that Ubuntu is based on Debian.

greenjeans · Yesterday 01:47:14

Unfortunately the result is not what I hoped for, the Ubuntu sourced gtk3-nocsd packages simply remove the CSD (i.e. the program icon on the left and the three windowbar icons on the right) but the SSD doesn't get added, Does anyone know what needs to be done to add the SSD?

It seems like it ought to be simple, I opened the gnome-disk-utility with GTK inspector, and was able to disable the CSD with some CSS, that program is still using gtk3 but is using libhandy to do the CSD I guess, I tried adding the CSS override and running the program normally but no joy. That program at least still has the SSD applied, but of course looks silly with two sets of min/max/close buttons. The GTK4 programs i've tried somehow throw the SSD completely out the window. I'm seriously considering forking some of them if I can, nuke 'em from orbit, it's the only way to be sure.

The officially official Devuan Forum!

#1 2025-06-29 21:00:29

noCSD for GTK4

#2 2025-06-29 21:15:38

Re: noCSD for GTK4

#3 2025-06-29 21:18:49

Re: noCSD for GTK4

#4 2025-06-29 23:08:19

Re: noCSD for GTK4

#5 2025-06-30 00:18:56

Re: noCSD for GTK4

#6 2025-06-30 00:25:52

Re: noCSD for GTK4

#7 2025-06-30 01:20:07

Re: noCSD for GTK4

#8 2025-06-30 02:04:39

Re: noCSD for GTK4

#9 2025-06-30 13:00:59

Re: noCSD for GTK4

#10 2025-06-30 14:32:11

Re: noCSD for GTK4

#11 2025-06-30 15:04:05

Re: noCSD for GTK4

#12 2025-06-30 15:28:53

Re: noCSD for GTK4

#13 2025-06-30 16:13:22

Re: noCSD for GTK4

#14 2025-06-30 16:37:52

Re: noCSD for GTK4

#15 2025-06-30 16:48:49

Re: noCSD for GTK4

#16 2025-06-30 17:50:09

Re: noCSD for GTK4

#17 2025-06-30 19:06:49

Re: noCSD for GTK4

#18 2025-06-30 19:26:45

Re: noCSD for GTK4

#19 Yesterday 00:32:35

Re: noCSD for GTK4

#20 Yesterday 01:04:31

Re: noCSD for GTK4

#21 Yesterday 01:34:51

Re: noCSD for GTK4

#22 Yesterday 01:47:14

Re: noCSD for GTK4

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