/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

////////////////////////////////////////////////////////////////////////////////
/**
 * <B>INTERFACE TO NETSCAPE COMMUNICATOR PLUGINS (NEW C++ API).</B>
 *
 * <P>This supersedes the old plugin API (npapi.h, npupp.h), and 
 * eliminates the need for glue files: npunix.c, npwin.cpp and npmac.cpp that
 * get linked with the plugin. You will however need to link with the "backward
 * adapter" (badapter.cpp) in order to allow your plugin to run in pre-5.0
 * browsers. 
 *
 * <P>See nsPlugin.idl for an overview of how this interface fits with the 
 * overall plugin architecture.
 */
////////////////////////////////////////////////////////////////////////////////

#include "nsPluginDefs.idl"

////////////////////////////////////////////////////////////////////////////////
// Plugin Instance Interface

/**
 * The nsIPluginInstance interface is the minimum interface plugin developers
 * need to support in order to implement a plugin instance. The plugin manager
 * may QueryInterface for more specific types, e.g. nsILiveConnectPluginInstance. 
 *
 * (Corresponds to NPP object.)
 *
 * The old NPP_Destroy call has been factored into two plugin instance 
 * methods:
 *
 * Stop -- called when the plugin instance is to be stopped (e.g. by 
 * displaying another plugin manager window, causing the page containing 
 * the plugin to become removed from the display).
 *
 * Destroy -- called once, before the plugin instance peer is to be 
 * destroyed. This method is used to destroy the plugin instance.
 */
[scriptable, uuid(f69b5c56-2de9-11d4-8cf4-0060b0fc14a3)]
interface nsIPluginInstance : nsISupports
{
    /**
     * Initializes a newly created plugin instance, passing to it the plugin
     * instance peer which it should use for all communication back to the browser.
     * 
     * @param peer - the corresponding plugin instance peer
     */
    void initialize(in nsIPluginInstancePeer peer);

    /**
     * Returns a reference back to the plugin instance peer. This method is
     * used whenever the browser needs to obtain the peer back from a plugin
     * instance. The implementation of this method should be sure to increment
     * the reference count on the peer by calling AddRef.
     *
     * @result - the resulting plugin instance peer
     */
    readonly attribute nsIPluginInstancePeer peer;

    /**
     * Called to instruct the plugin instance to start. This will be called after
     * the plugin is first created and initialized, and may be called after the
     * plugin is stopped (via the Stop method) if the plugin instance is returned
     * to in the browser window's history.
     */
    void start();

    /**
     * Called to instruct the plugin instance to stop, thereby suspending its state.
     * This method will be called whenever the browser window goes on to display
     * another page and the page containing the plugin goes into the window's history
     * list.
     */
    void stop();

    /**
     * Called to instruct the plugin instance to destroy itself. This is called when
     * it become no longer possible to return to the plugin instance, either because 
     * the browser window's history list of pages is being trimmed, or because the
     * window containing this page in the history is being closed.
     */
    void destroy();

    /**
     * Called when the window containing the plugin instance changes.
     *
     * (Corresponds to NPP_SetWindow.)
     *
     * @param window - the plugin window structure
     */
    [noscript] void setWindow(in nsPluginWindowPtr window);

    /**
     * Called to tell the plugin that the initial src/data stream is
	 * ready.  Expects the plugin to return a nsIPluginStreamListener.
     *
     * (Corresponds to NPP_NewStream.)
     *
     * @result - listener the browser will use to give the plugin the data
     */
    nsIPluginStreamListener newStream();

    /**
     * Called to instruct the plugin instance to print itself to a printer.
     *
     * (Corresponds to NPP_Print.)
     *
     * @param platformPrint - platform-specific printing information
     * @result - NS_OK if this operation was successful
     */
    [noscript] void print(in nsPluginPrintPtr platformPrint);
};