gecko-dev/docshell/base/nsIContextMenuListener.idl

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/* -*- 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);
};