commit afeaf129349d09e21bbbf8c5c486865140aac9d3
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Sat Sep 13 11:46:22 2025 +0200
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Sat Sep 13 11:46:22 2025 +0200

    Update bundled libdecor to last upstream version (August 15, 2025)

 documentation/src/bundled-libs.dox      |  4 ++--
 libdecor/src/plugins/gtk/libdecor-gtk.c | 28 ++++++++++++++++++++--------
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git documentation/src/bundled-libs.dox documentation/src/bundled-libs.dox
index aa2a62f..b9e4252 100644
--- documentation/src/bundled-libs.dox
+++ documentation/src/bundled-libs.dox
@@ -23,14 +23,14 @@ The nanosvg library is not affected.
 
 \section bundled-status Current status
 \code
-Current versions of bundled libraries (as of Sept 7, 2025):
+Current versions of bundled libraries (as of Sept 13, 2025):
   Library       Version/git commit Release date         FLTK Version
   --------------------------------------------------------------------------
   jpeg          jpeg-9f            2024-01-14           1.4.0
   nanosvg       7aeda550a8 [1]     2023-12-02           1.4.0
   png           libpng-1.6.50      2025-07-01           1.5.0
   zlib          zlib-1.3.1         2024-01-22           1.4.0
-  libdecor      42f7a53a   [2]     2025-05-14           1.5.0
+  libdecor      c4540b4a   [2]     2025-08-15           1.5.0
   --------------------------------------------------------------------------
 
 Previous versions of bundled libraries (FLTK 1.3.x):
diff --git libdecor/src/plugins/gtk/libdecor-gtk.c libdecor/src/plugins/gtk/libdecor-gtk.c
index 3e79983..bc5b0fa 100644
--- libdecor/src/plugins/gtk/libdecor-gtk.c
+++ libdecor/src/plugins/gtk/libdecor-gtk.c
@@ -924,6 +924,11 @@ ensure_title_bar_surfaces(struct libdecor_frame_gtk *frame_gtk)
 	frame_gtk->headerbar.opaque = false;
 	ensure_component(frame_gtk, &frame_gtk->headerbar);
 
+	if (frame_gtk->shadow.wl_surface) {
+		wl_subsurface_place_above(frame_gtk->headerbar.wl_subsurface,
+					  frame_gtk->shadow.wl_surface);
+	}
+
 	/* create an offscreen window with a header bar */
 	/* TODO: This should only be done once at frame consutrction, but then
 	 *       the window and headerbar would not change style (e.g. backdrop)
@@ -1761,6 +1766,8 @@ libdecor_plugin_gtk_frame_get_border_size(struct libdecor_plugin *plugin,
 					  int *top,
 					  int *bottom)
 {
+	struct libdecor_frame_gtk *frame_gtk =
+		(struct libdecor_frame_gtk *) frame;
 	enum libdecor_window_state window_state;
 
 	if (configuration) {
@@ -1778,17 +1785,22 @@ libdecor_plugin_gtk_frame_get_border_size(struct libdecor_plugin *plugin,
 	if (bottom)
 		*bottom = 0;
 	if (top) {
-		GtkWidget *header = ((struct libdecor_frame_gtk *)frame)->header;
 		enum decoration_type type = window_state_to_decoration_type(window_state);
 
-		/* avoid warnings after decoration has been turned off */
-		if (GTK_IS_WIDGET(header) && (type != DECORATION_TYPE_NONE)) {
-			/* Redraw title bar to ensure size will be up-to-date */
-			if (configuration && type == DECORATION_TYPE_TITLE_ONLY)
-				draw_title_bar((struct libdecor_frame_gtk *) frame);
-			*top = gtk_widget_get_allocated_height(header);
-		} else {
+		switch (type) {
+		case DECORATION_TYPE_NONE:
 			*top = 0;
+			break;
+		case DECORATION_TYPE_ALL:
+			ensure_border_surfaces(frame_gtk);
+			//draw_border(frame_gtk);
+			G_GNUC_FALLTHROUGH;
+		case DECORATION_TYPE_TITLE_ONLY:
+			if (!frame_gtk->header)
+				ensure_title_bar_surfaces(frame_gtk);
+			gtk_widget_show_all(frame_gtk->window);
+			gtk_widget_get_preferred_height(frame_gtk->header, NULL, top);
+			break;
 		}
 	}