1 files changed, 25 insertions, 0 deletions
diff --git a/xpcom/base/nsIProgrammingLanguage.idl b/xpcom/base/nsIProgrammingLanguage.idl
new file mode 100644
index 000000000..57621168b
--- /dev/null
+++ b/xpcom/base/nsIProgrammingLanguage.idl
@@ -0,0 +1,25 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+
+/**
+ * Legacy constants for specifying programming languages.
+ *
+ * JAVASCRIPT is needed to avoid breaking addons that use it in nsIClassInfo
+ * to define fields that are no longer needed.
+ *
+ * UNKNOWN and JAVASCRIPT are also used in implementations of
+ * nsIStackFrame::language.
+ */
+
+[scriptable, uuid(02ad9f22-3c98-46f3-be4e-2f5c9299e29a)]
+interface nsIProgrammingLanguage : nsISupports
+{
+    const uint32_t UNKNOWN     = 0;
+    // 1 is unused.
+    const uint32_t JAVASCRIPT  = 2;
+};