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+/* -*- 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"
+
+interface nsIXPCScriptable;
+
+/**
+ * Provides information about a specific implementation class. If you want
+ * your class to implement nsIClassInfo, see nsIClassInfoImpl.h for
+ * instructions--you most likely do not want to inherit from nsIClassInfo.
+ */
+
+[scriptable, uuid(a60569d7-d401-4677-ba63-2aa5971af25d)]
+interface nsIClassInfo : nsISupports
+{
+ /**
+ * Returns a list of the interfaces which instances of this class promise
+ * to implement. Note that nsISupports is an implicit member of any such
+ * list, and need not be included.
+ */
+ readonly attribute Array<nsIIDRef> interfaces;
+
+ /**
+ * Return an object to assist XPConnect in supplying JavaScript-specific
+ * behavior to callers of the instance object, or null if not needed.
+ */
+ nsIXPCScriptable getScriptableHelper();
+
+ /**
+ * A contract ID through which an instance of this class can be created
+ * (or accessed as a service, if |flags & SINGLETON|), or null/void.
+ */
+ readonly attribute AUTF8String contractID;
+
+ /**
+ * A human readable string naming the class, or null/void.
+ */
+ readonly attribute AUTF8String classDescription;
+
+ /**
+ * A class ID through which an instance of this class can be created
+ * (or accessed as a service, if |flags & SINGLETON|), or null.
+ */
+ readonly attribute nsCIDPtr classID;
+
+ /**
+ * Bitflags for 'flags' attribute.
+ */
+ const uint32_t SINGLETON = 1 << 0;
+ const uint32_t THREADSAFE = 1 << 1;
+ const uint32_t SINGLETON_CLASSINFO = 1 << 5;
+
+ // The high order bit is RESERVED for consumers of these flags.
+ // No implementor of this interface should ever return flags
+ // with this bit set.
+ const uint32_t RESERVED = 1 << 31;
+
+
+ readonly attribute uint32_t flags;
+
+ /**
+ * Also a class ID through which an instance of this class can be created
+ * (or accessed as a service, if |flags & SINGLETON|). If the class does
+ * not have a CID, it should return NS_ERROR_NOT_AVAILABLE. This attribute
+ * exists so C++ callers can avoid allocating and freeing a CID, as would
+ * happen if they used classID.
+ */
+ [noscript] readonly attribute nsCID classIDNoAlloc;
+
+};