import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/protocol/res/nsISubstitutingProtocolHandler.idl

@@ -0,0 +1,46 @@
+/* -*- 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 "nsIProtocolHandler.idl"
+
+/**
+ * Protocol handler superinterface for a protocol which performs substitutions
+ * from URIs of its scheme to URIs of another scheme.
+ */
+[scriptable, uuid(154c64fd-a69e-4105-89f8-bd7dfe621372)]
+interface nsISubstitutingProtocolHandler : nsIProtocolHandler
+{
+  /**
+   * Sets the substitution for the root key:
+   *   resource://root/path ==> baseURI.resolve(path)
+   *
+   * A null baseURI removes the specified substitution.
+   *
+   * A root key should always be lowercase; however, this may not be
+   * enforced.
+   */
+  void setSubstitution(in ACString root, in nsIURI baseURI);
+
+  /**
+   * Gets the substitution for the root key.
+   *
+   * @throws NS_ERROR_NOT_AVAILABLE if none exists.
+   */
+  nsIURI getSubstitution(in ACString root);
+
+  /**
+   * Returns TRUE if the substitution exists and FALSE otherwise.
+   */
+  boolean hasSubstitution(in ACString root);
+
+  /**
+   * Utility function to resolve a substituted URI.  A resolved URI is not
+   * guaranteed to reference a resource that exists (ie. opening a channel to
+   * the resolved URI may fail).
+   *
+   * @throws NS_ERROR_NOT_AVAILABLE if resURI.host() is an unknown root key.
+   */
+  AUTF8String resolveURI(in nsIURI resURI);
+};