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+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#include "nsIProperties.idl"
+
+interface nsIInputStream;
+interface nsIOutputStream;
+interface nsISimpleEnumerator;
+
+[scriptable, uuid(283EE646-1AEF-11D4-98B3-00C04fA0CE9A)]
+interface nsIPropertyElement : nsISupports {
+ attribute AUTF8String key;
+ attribute AString value;
+};
+
+[scriptable, uuid(706867af-0400-4faa-beb1-0dae87308784)]
+interface nsIPersistentProperties : nsIProperties
+{
+ /**
+ * load a set of name/value pairs from the input stream
+ * names and values should be in UTF8
+ */
+ void load(in nsIInputStream input);
+
+ /**
+ * output the values to the stream - results will be in UTF8
+ */
+ void save(in nsIOutputStream output, in AUTF8String header);
+
+ /**
+ * get an enumeration of nsIPropertyElement objects,
+ * which are read-only (i.e. setting properties on the element will
+ * not make changes back into the source nsIPersistentProperties
+ */
+ nsISimpleEnumerator enumerate();
+
+ /**
+ * shortcut to nsIProperty's get() which retrieves a string value
+ * directly (and thus faster)
+ */
+ AString getStringProperty(in AUTF8String key);
+
+ /**
+ * shortcut to nsIProperty's set() which sets a string value
+ * directly (and thus faster). If the given property already exists,
+ * then the old value will be returned
+ */
+ AString setStringProperty(in AUTF8String key, in AString value);
+};
+
+
+%{C++
+
+#define NS_IPERSISTENTPROPERTIES_CID \
+{ 0x2245e573, 0x9464, 0x11d2, \
+ { 0x9b, 0x8b, 0x0, 0x80, 0x5f, 0x8a, 0x16, 0xd9 } }
+
+#define NS_PERSISTENTPROPERTIES_CONTRACTID "@mozilla.org/persistent-properties;1"
+
+%}
+