1 files changed, 36 insertions, 0 deletions
diff --git a/dom/xslt/base/txErrorObserver.h b/dom/xslt/base/txErrorObserver.h
new file mode 100644
index 0000000000..30b541f2a9
--- /dev/null
+++ b/dom/xslt/base/txErrorObserver.h
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MITRE_ERROROBSERVER_H
+#define MITRE_ERROROBSERVER_H
+
+#include "txCore.h"
+
+/**
+ * A simple interface for observing errors
+ **/
+class ErrorObserver {
+ public:
+  /**
+   * Default Destructor for ErrorObserver
+   **/
+  virtual ~ErrorObserver(){};
+
+  /**
+   *  Notifies this Error observer of a new error aRes
+   **/
+  virtual void receiveError(const nsAString& errorMessage, nsresult aRes) = 0;
+
+  /**
+   *  Notifies this Error observer of a new error, with default
+   *  error code NS_ERROR_FAILURE
+   **/
+  void receiveError(const nsAString& errorMessage) {
+    receiveError(errorMessage, NS_ERROR_FAILURE);
+  }
+
+};  //-- ErrorObserver
+
+#endif