diff -r 000000000000 -r 6474c204b198 embedding/browser/webBrowser/nsIContextMenuListener.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/embedding/browser/webBrowser/nsIContextMenuListener.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* -*- Mode: IDL; 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/. */
+ 
+#include "nsISupports.idl"
+
+interface nsIDOMEvent;
+interface nsIDOMNode;
+
+/**
+ * An optional interface for embedding clients wishing to receive
+ * notifications for context menu events (e.g. generated by
+ * a user right-mouse clicking on a link). The embedder implements
+ * this interface on the web browser chrome object associated
+ * with the window that notifications are required for. When a context
+ * menu event, the browser will call this interface if present.
+ * 
+ * @see nsIDOMNode
+ * @see nsIDOMEvent
+ */
+[scriptable, uuid(3478b6b0-3875-11d4-94ef-0020183bf181)]
+interface nsIContextMenuListener : nsISupports
+{
+    /** Flag. No context. */
+    const unsigned long CONTEXT_NONE     = 0;
+    /** Flag. Context is a link element. */
+    const unsigned long CONTEXT_LINK     = 1;
+    /** Flag. Context is an image element. */
+    const unsigned long CONTEXT_IMAGE    = 2;
+    /** Flag. Context is the whole document. */
+    const unsigned long CONTEXT_DOCUMENT = 4;
+    /** Flag. Context is a text area element. */
+    const unsigned long CONTEXT_TEXT     = 8;
+    /** Flag. Context is an input element. */
+    const unsigned long CONTEXT_INPUT    = 16;
+
+    /**
+     * Called when the browser receives a context menu event (e.g. user is right-mouse
+     * clicking somewhere on the document). The combination of flags, event and node
+     * provided in the call indicate where and what was clicked on.
+     *
+     * The following table describes what context flags and node combinations are
+     * possible.
+     *
+     * <TABLE>
+     * <TR><TD><B>aContextFlag</B></TD><TD>aNode</TD></TR>
+     * <TR><TD>CONTEXT_LINK</TD><TD>&lt;A&gt;</TD></TR>
+     * <TR><TD>CONTEXT_IMAGE</TD><TD>&lt;IMG&gt;</TD></TR>
+     * <TR><TD>CONTEXT_IMAGE | CONTEXT_LINK</TD><TD>&lt;IMG&gt;
+     *       with an &lt;A&gt; as an ancestor</TD></TR>
+     * <TR><TD>CONTEXT_INPUT</TD><TD>&lt;INPUT&gt;</TD></TR>
+     * <TR><TD>CONTEXT_TEXT</TD><TD>&lt;TEXTAREA&gt;</TD></TR>
+     * <TR><TD>CONTEXT_DOCUMENT</TD><TD>&lt;HTML&gt;</TD></TR>
+     * </TABLE>
+     *
+     * @param aContextFlags Flags indicating the kind of context.
+     * @param aEvent The DOM context menu event.
+     * @param aNode The DOM node most relevant to the context.
+     *
+     * @return <CODE>NS_OK</CODE> always.
+     */
+    void onShowContextMenu(in unsigned long aContextFlags, in nsIDOMEvent aEvent, in nsIDOMNode aNode);
+};
+