...

1 files changed, 153 insertions, 0 deletions

diff --git a/src/errors.c b/src/errors.c
new file mode 100644
index 00000000..24e59f70
--- /dev/null
+++ b/src/errors.c
@@ -0,0 +1,153 @@
+/* Metacity X error handling */
+
+/* 
+ * Copyright (C) 2001 Havoc Pennington, error trapping inspired by GDK
+ * code copyrighted by the GTK team.
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "errors.h"
+#include <errno.h>
+
+typedef struct _ErrorTrap  ErrorTrap;
+
+struct _ErrorTrap
+{
+  int error_code;
+};
+
+static int x_error_handler    (Display     *display,
+                               XErrorEvent *error);
+static int x_io_error_handler (Display     *display);
+
+void
+meta_errors_init (void)
+{
+  XSetErrorHandler (x_error_handler);
+  XSetIOErrorHandler (x_io_error_handler);
+}
+
+void
+meta_error_trap_push (MetaDisplay *display)
+{
+  ErrorTrap *et;
+
+  et = g_new (ErrorTrap, 1);
+
+  et->error_code = Success;
+  display->error_traps = g_slist_prepend (display->error_traps, et);  
+}
+
+int
+meta_error_trap_pop (MetaDisplay *display)
+{
+  int result;
+  ErrorTrap *et;
+  GSList *next;
+  
+  if (display->error_traps == NULL)
+    meta_bug ("No error trap to pop\n");
+
+  XSync (display->xdisplay, False);
+  
+  et = display->error_traps->data;
+
+  result = et->error_code;
+
+  next = display->error_traps->next;
+  g_slist_free_1 (display->error_traps);
+  display->error_traps = next;
+
+  g_free (et);
+  
+  return result;
+}
+
+
+static int
+x_error_handler (Display     *xdisplay,
+                 XErrorEvent *error)
+{
+  if (error->error_code)
+    {
+      MetaDisplay *display;
+
+      display = meta_display_for_x_display (xdisplay);
+
+      if (display == NULL)
+        meta_bug ("Error received for unknown display?\n");
+      
+      if (display->error_traps == NULL)
+        {
+          gchar buf[64];
+
+	  XGetErrorText (xdisplay, error->error_code, buf, 63);
+          
+          meta_fatal ("Received an X Window System error without handling it.\n"
+                      "The error was '%s'.\n"
+                      "  (Details: serial %ld error_code %d request_code %d minor_code %d)\n",
+                      buf,
+                      error->serial, 
+                      error->error_code, 
+                      error->request_code,
+                      error->minor_code);
+	}
+      else
+        {
+          ErrorTrap *et;
+
+          et = display->error_traps->data;
+
+          et->error_code = error->error_code;
+        }
+    }
+  
+  return 0;
+}
+
+static int
+x_io_error_handler (Display *xdisplay)
+{
+  MetaDisplay *display;
+
+  display = meta_display_for_x_display (xdisplay);
+
+  if (display == NULL)
+    meta_bug ("Error received for unknown display?\n");
+  
+  if (errno == EPIPE)
+    {
+      meta_warning (_("Lost connection to the display '%s';\n"
+                      "most likely the X server was shut down or you killed/destroyed\n"
+                      "the window manager.\n"),
+                    display->name);
+    }
+  else
+    {
+      meta_warning (_("Fatal IO error %d (%s) on display '%s'.\n"),
+                    errno, g_strerror (errno),
+                    display->name);
+    }
+
+  meta_display_close (display);
+  
+  /* I believe Xlib will force an exit after we return, which
+   * seems sort of broken to me, but if true we should probably just
+   * exit for ourselves. But for now I'm not doing it.
+   */
+  return 0;
+}