From 49942432f1d908d801d8ec353887eee2d110e5e2 Mon Sep 17 00:00:00 2001
From: William Wold <wm@wmww.sh>
Date: Mon, 17 Jun 2019 22:33:59 +0000
Subject: Wayland support for panel-applet-container.c

---
 .../panel-applet-container.c                       | 50 +++++++++++++++++-----
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/mate-panel/libmate-panel-applet-private/panel-applet-container.c b/mate-panel/libmate-panel-applet-private/panel-applet-container.c
index 04ee799b..f6e0f94c 100644
--- a/mate-panel/libmate-panel-applet-private/panel-applet-container.c
+++ b/mate-panel/libmate-panel-applet-private/panel-applet-container.c
@@ -20,9 +20,15 @@
  *
  */
 
+#include <config.h>
 #include <string.h>
+
 #include <gtk/gtk.h>
+
+#ifdef HAVE_X11
 #include <gtk/gtkx.h>
+#endif
+
 #include <panel-applets-manager.h>
 #include "panel-applet-container.h"
 #include "panel-marshal.h"
@@ -74,7 +80,9 @@ static const AppletPropertyInfo applet_properties [] = {
 #define MATE_PANEL_APPLET_FACTORY_OBJECT_PATH "/org/mate/panel/applet/%s"
 #define MATE_PANEL_APPLET_INTERFACE           "org.mate.panel.applet.Applet"
 
+#ifdef HAVE_X11
 static gboolean mate_panel_applet_container_plug_removed (MatePanelAppletContainer *container);
+#endif
 
 G_DEFINE_TYPE_WITH_PRIVATE (MatePanelAppletContainer, mate_panel_applet_container, GTK_TYPE_EVENT_BOX);
 
@@ -97,15 +105,23 @@ static void
 panel_applet_container_setup (MatePanelAppletContainer *container)
 {
 	if (container->priv->out_of_process) {
-		container->priv->socket = gtk_socket_new ();
-
-		g_signal_connect_swapped (container->priv->socket,
-		                          "plug-removed",
-		                          G_CALLBACK (mate_panel_applet_container_plug_removed),
-		                          container);
-
-		gtk_container_add (GTK_CONTAINER (container), container->priv->socket);
-		gtk_widget_show (container->priv->socket);
+#ifdef HAVE_X11
+		if (GDK_IS_X11_DISPLAY (gdk_display_get_default ())) {
+			container->priv->socket = gtk_socket_new ();
+
+			g_signal_connect_swapped (container->priv->socket,
+						"plug-removed",
+						G_CALLBACK (mate_panel_applet_container_plug_removed),
+						container);
+
+			gtk_container_add (GTK_CONTAINER (container), container->priv->socket);
+			gtk_widget_show (container->priv->socket);
+		} else
+#endif
+		{ // Not using X11
+			g_warning("%s requested out-of-process container, which is only supported on X11",
+				  container->priv->iid);
+		}
 	} else {
 		GtkWidget *applet;
 
@@ -253,9 +269,12 @@ mate_panel_applet_container_new (void)
 	return container;
 }
 
+#ifdef HAVE_X11
 static gboolean
 mate_panel_applet_container_plug_removed (MatePanelAppletContainer *container)
 {
+	g_return_val_if_fail (GDK_IS_X11_DISPLAY (gtk_widget_get_display (GTK_WIDGET (container))), FALSE);
+
 	if (!container->priv->applet_proxy)
 		return FALSE;
 
@@ -276,6 +295,7 @@ mate_panel_applet_container_plug_removed (MatePanelAppletContainer *container)
 	 */
 	return FALSE;
 }
+#endif // HAVE_X11
 
 static void
 mate_panel_applet_container_child_signal (GDBusProxy           *proxy,
@@ -368,10 +388,13 @@ on_proxy_appeared (GObject      *source_object,
 
 	panel_applet_container_setup (container);
 
+#ifdef HAVE_X11
+	// xid always <= 0 when not using X11
 	if (container->priv->xid > 0) {
 		gtk_socket_add_id (GTK_SOCKET (container->priv->socket),
 				   container->priv->xid);
 	}
+#endif
 
 	/* g_async_result_get_source_object returns new ref */
 	g_object_unref (container);
@@ -505,7 +528,14 @@ mate_panel_applet_container_get_applet (MatePanelAppletContainer *container,
 
 	/* we can't use the screen of the container widget since it's not in a
 	 * widget hierarchy yet */
-	screen_number = gdk_x11_screen_get_screen_number (screen);
+#ifdef HAVE_X11
+	if (GDK_IS_X11_DISPLAY (gdk_screen_get_display (screen))) {
+		screen_number = gdk_x11_screen_get_screen_number (screen);
+	} else
+#endif
+	{ // Not using X11
+		screen_number = 0;
+	}
 
 	data = g_new (AppletFactoryData, 1);
 	data->result = result;
-- 
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