Add XSetErrorHandler for not crashing on X errors caused by Gecko plugins.

lib/src/sugar-browser.cpp

@@ -24,6 +24,7 @@
 #include "GeckoContentHandler.h"
 #include "GeckoDownload.h"
 
+#include <gdk/gdkx.h>
 #include <gtkmozembed_internal.h>
 #include <nsCOMPtr.h>
 #include <nsIPrefService.h>
@@ -89,6 +90,34 @@ static const nsModuleComponentInfo sSugarComponents[] = {
 	}
 };
 
+int (*old_handler) (Display *, XErrorEvent *);
+
+static int
+error_handler (Display *d, XErrorEvent *e)
+{
+    gchar buf[64];
+    gchar *msg;
+
+    XGetErrorText (d, e->error_code, buf, 63);
+
+    msg =
+    g_strdup_printf ("The program '%s' received an X Window System error.\n"
+                     "This probably reflects a bug in the program.\n"
+                     "The error was '%s'.\n"
+                     "  (Details: serial %ld error_code %d request_code %d minor_code %d)\n",
+                     g_get_prgname (),
+                     buf,
+                     e->serial, 
+                     e->error_code, 
+                     e->request_code,
+                     e->minor_code);
+
+    g_error ("%s", msg);
+
+    return 0;
+    /*return (*old_handler)(d, e);*/
+}
+
 static void
 setup_plugin_path ()
 {
@@ -113,6 +142,8 @@ sugar_browser_startup(const char *profile_path, const char *profile_name)
 
 	gtk_moz_embed_set_profile_path(profile_path, profile_name);
 
+    old_handler = XSetErrorHandler (error_handler);
+
     gtk_moz_embed_push_startup();
 
 	nsCOMPtr<nsIPrefService> prefService;