/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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 the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nspluginroot.idl"
#include "nsISupports.idl"
#include "nsIPluginInstanceOwner.idl"
#include "nsIStreamListener.idl"
#include "nsIStringStream.idl"
#include "nsIPluginTag.idl"

%{C++
#include "nsPluginNativeWindow.h"
#include "nsplugindefs.h"
#ifdef MOZILLA_INTERNAL_API
#include "nsString.h"
#include "nsNetUtil.h"
#endif
#include "prlink.h"  // for PRLibrary

#define MOZ_PLUGIN_HOST_CONTRACTID \
  "@mozilla.org/plugin/host;1"
%}

interface nsIPlugin;
interface nsIURI;
interface nsIDOMPlugin;
interface nsIChannel;
interface nsIPluginStreamListener;

[ptr] native PRLibraryPtr(PRLibrary);
[ref] native nsIStreamListenerRef(nsIStreamListener *);
[ptr] native nsPluginNativeWindowPtr(nsPluginNativeWindow);

[scriptable, uuid(30C7C529-B05C-4950-B5B8-9AF673E46521)]
interface nsIPluginHost : nsISupports
{
  [noscript] void init();

  [noscript] void destroy();

  [noscript] void loadPlugins();

  /**
   * Causes the plugins directory to be searched again for new plugin 
   * libraries.
   *
   * @param reloadPages - indicates whether currently visible pages should 
   * also be reloaded
   */
  void reloadPlugins(in boolean reloadPages);

  [noscript] nsIPlugin getPlugin(in string aMimeType);

  [noscript] void instantiateEmbeddedPlugin(in string aMimeType, in nsIURI aURL, in nsIPluginInstanceOwner aOwner);

  [noscript] void instantiateFullPagePlugin(in string aMimeType, in nsIURI aURI, in nsIStreamListenerRef aStreamListener, in nsIPluginInstanceOwner aOwner);

  /**
   * Instantiate an embedded plugin for an existing channel. The caller is
   * responsible for opening the channel. It may or may not be already opened
   * when this function is called.
   */
  [noscript] nsIStreamListener instantiatePluginForChannel(in nsIChannel aChannel, in nsIPluginInstanceOwner aOwner);

  [noscript] void setUpPluginInstance(in string aMimeType, in nsIURI aURL, in nsIPluginInstanceOwner aOwner);

  // The return code is NS_OK if the plugin is enabled,
  // NS_ERROR_PLUGIN_DISABLED if the plugin is explicitly disabled, and
  // NS_ERROR_FAILURE if there is no plugin for this type.
  [noscript] void isPluginEnabledForType(in string aMimeType);

  // The return code is NS_OK if the plugin is enabled and NS_ERROR_FAILURE if
  // the plugin is explicitly disabled or there is no plugin.
  [noscript] void isPluginEnabledForExtension(in string aExtension, in constCharStarRef aMimeType);

  [noscript] readonly attribute unsigned long pluginCount;
  
  [noscript] void getPlugins(in unsigned long aPluginCount, out /*array*/ nsIDOMPlugin aPluginArray);

  void getPluginTags(out unsigned long aPluginCount,
    [retval, array, size_is(aPluginCount)] out nsIPluginTag aResults);

  [noscript] void stopPluginInstance(in nsIPluginInstance aInstance);

  [noscript] void handleBadPlugin(in PRLibraryPtr aLibrary, in nsIPluginInstance instance);
  
  /**
   * Fetches a URL.
   *
   * (Corresponds to NPN_GetURL and NPN_GetURLNotify.)
   *
   * @param pluginInst - the plugin making the request. If NULL, the URL
   *  is fetched in the background.
   * @param url - the URL to fetch
   * @param target - the target window into which to load the URL, or NULL if
   *  the data should be returned to the plugin via streamListener.
   * @param streamListener - a stream listener to be used to return data to
   *  the plugin. May be NULL if target is not NULL.
   * @param altHost - an IP-address string that will be used instead of the 
   *  host specified in the URL. This is used to prevent DNS-spoofing 
   *  attacks. Can be defaulted to NULL meaning use the host in the URL.
   * @param referrer - the referring URL (may be NULL)
   * @param forceJSEnabled - forces JavaScript to be enabled for 'javascript:'
   *  URLs, even if the user currently has JavaScript disabled (usually 
   *  specify PR_FALSE) 
   * @result - NS_OK if this operation was successful
   */
%{C++
  NS_IMETHOD
  GetURL(nsISupports* pluginInst,
         const char* url,
         const char* target = NULL,
         nsIPluginStreamListener* streamListener = NULL,
         const char* altHost = NULL,
         const char* referrer = NULL,
         PRBool forceJSEnabled = PR_FALSE) = 0;
%}

  /**
   * Posts to a URL with post data and/or post headers.
   *
   * (Corresponds to NPN_PostURL and NPN_PostURLNotify.)
   *
   * @param pluginInst - the plugin making the request. If NULL, the URL
   *  is fetched in the background.
   * @param url - the URL to fetch
   * @param postDataLength - the length of postData (if non-NULL)
   * @param postData - the data to POST. NULL specifies that there is not post
   *  data
   * @param isFile - whether the postData specifies the name of a file to 
   *  post instead of data. The file will be deleted afterwards.
   * @param target - the target window into which to load the URL, or NULL if
   *  the data should be returned to the plugin via streamListener.
   * @param streamListener - a stream listener to be used to return data to
   *  the plugin. May be NULL if target is not NULL.
   * @param altHost - an IP-address string that will be used instead of the 
   *  host specified in the URL. This is used to prevent DNS-spoofing 
   *  attacks. Can be defaulted to NULL meaning use the host in the URL.
   * @param referrer - the referring URL (may be NULL)
   * @param forceJSEnabled - forces JavaScript to be enabled for 'javascript:'
   *  URLs, even if the user currently has JavaScript disabled (usually 
   *  specify PR_FALSE) 
   * @param postHeadersLength - the length of postHeaders (if non-NULL)
   * @param postHeaders - the headers to POST. Must be in the form of
   * "HeaderName: HeaderValue\r\n".  Each header, including the last,
   * must be followed by "\r\n".  NULL specifies that there are no
   * post headers
   * @result - NS_OK if this operation was successful
   */
%{C++
  NS_IMETHOD
  PostURL(nsISupports* pluginInst,
          const char* url,
          PRUint32 postDataLen,
          const char* postData,
          PRBool isFile = PR_FALSE,
          const char* target = NULL,
          nsIPluginStreamListener* streamListener = NULL,
          const char* altHost = NULL,
          const char* referrer = NULL,
          PRBool forceJSEnabled = PR_FALSE,
          PRUint32 postHeadersLength = 0,
          const char* postHeaders = NULL) = 0;
%}

  /**
   * Returns the proxy info for a given URL. The caller is required to
   * free the resulting memory with nsIMalloc::Free. The result will be in the
   * following format
   * 
   *   i)   "DIRECT"  -- no proxy
   *   ii)  "PROXY xxx.xxx.xxx.xxx"   -- use proxy
   *   iii) "SOCKS xxx.xxx.xxx.xxx"  -- use SOCKS
   *   iv)  Mixed. e.g. "PROXY 111.111.111.111;PROXY 112.112.112.112",
   *                    "PROXY 111.111.111.111;SOCKS 112.112.112.112"....
   *
   * Which proxy/SOCKS to use is determined by the plugin.
   */
  void findProxyForURL(in string aURL, out string aResult);

  [noscript] void UserAgent(in nativeChar resultingAgentString);

  /**
   * To notify the plugin manager that the plugin created a script object 
   */
  [noscript] void setIsScriptableInstance(in nsIPluginInstance aInstance, in boolean aScriptable);

  /**
   * This method parses post buffer to find out case insensitive "Content-length" string
   * and CR or LF some where after that, then it assumes there is http headers in
   * the input buffer and continue to search for end of headers (CRLFCRLF or LFLF).
   * It will *always malloc()* output buffer (caller is responsible to free it) 
   * if input buffer starts with LF, which comes from 4.x spec 
   * http://developer.netscape.com/docs/manuals/communicator/plugin/pgfn2.htm#1007754
   * "If no custom headers are required, simply add a blank
   * line ('\n') to the beginning of the file or buffer.",
   * it skips that '\n' and considers rest of the input buffer as data.
   * If "Content-length" string and end of headers is found 
   *   it substitutes single LF with CRLF in the headers, so the end of headers
   *   always will be CRLFCRLF (single CR in headers, if any, remain untouched)
   * else
   *   it puts "Content-length: "+size_of_data+CRLFCRLF at the beginning of the output buffer
   * and memcpy data to the output buffer 
   *
   * On failure outPostData and outPostDataLen will be set in 0.  
   * @param aInPostData      - the post data
   * @param aInPostDataLen   - the length aInPostData
   * @param aOutPostData     - the buffer
   * @param aOutPostDataLen  - the length of aOutPostData
   */
  [noscript] void parsePostBufferToFixHeaders(in string aInPostData, 
                                              in unsigned long aInPostDataLen, 
                                              out string aOutPostData, 
                                              out unsigned long aOutPostDataLen);

  /**
   * To create tmp file with Content len header in, it will use by http POST
   */
  [noscript] void createTmpFileToPost(in string aPostDataURL, out string aTmpFileName);

  /**
   *  Creates a new plugin native window object
   */
  [noscript] void newPluginNativeWindow(out nsPluginNativeWindowPtr aPluginNativeWindow);

  /**
   *  Deletes plugin native window object created by NewPluginNativeWindow
   */
  [noscript] void deletePluginNativeWindow(in nsPluginNativeWindowPtr aPluginNativeWindow);

  /**
   * Instantiate a "dummy" java plugin if a java plugin that supports
   * NPRuntime is installed. This plugin is used for exposing
   * window.java and window.Packages. If the java plugin supports
   * NPRuntime and instantiation was successful, aOwners instance will
   * be non-null, if not, it will be null.
   */
  [noscript] void instantiateDummyJavaPlugin(in nsIPluginInstanceOwner aOwner);

  /**
   * Get the plugin name for the plugin instance.
   * @param aInstance the plugin instance object
   * @param aPluginName returns a pointer to a shared readonly string value,
   *        it's only valid for the lifetime of the plugin instance - you must
   *        copy the string value if you need it longer than that.
   */
  [noscript] void getPluginName(in nsIPluginInstance aInstance, [shared] out string aPluginName);

  /**
   * Get the plugin tag associated with a given plugin instance.
   * @param aInstance the plugin instance object
   * @return plugin tag object
   */
  [noscript] nsIPluginTag getPluginTagForInstance(in nsIPluginInstance aInstance);
};

%{C++
#ifdef MOZILLA_INTERNAL_API
/**
 * Used for creating the correct input stream for plugins
 * We can either have raw data (with or without \r\n\r\n) or a path to a file (but it must be native!)
 * When making an nsIInputStream stream for the plugins POST data, be sure to take into 
 * account that it could be binary and full of nulls, see bug 105417. Also, we need 
 * to make a copy of the buffer because the plugin may have allocated it on the stack.
 * For an example of this, see Shockwave registration or bug 108966
 * We malloc only for headers here, buffer for data itself is malloced by ParsePostBufferToFixHeaders()
 */

inline nsresult
NS_NewPluginPostDataStream(nsIInputStream **result,
                           const char *data,
                           PRUint32 contentLength,
                           PRBool isFile = PR_FALSE,
                           PRBool headers = PR_FALSE)
{
  nsresult rv = NS_ERROR_UNEXPECTED;
  if (!data)
    return rv;

  if (!isFile) { // do raw data case first
    if (contentLength < 1)
      return rv;
    
    char *buf = (char*) data;
    if (headers) {
      // in assumption we got correctly formated headers just passed in
      if (!(buf = (char*)nsMemory::Alloc(contentLength)))
        return NS_ERROR_OUT_OF_MEMORY;
      memcpy(buf, data, contentLength);
    }
    nsCOMPtr<nsIStringInputStream> sis = do_CreateInstance("@mozilla.org/io/string-input-stream;1",&rv);
    if (NS_SUCCEEDED(rv)) {
      sis->AdoptData(buf, contentLength);  // let the string stream manage our data
      rv = CallQueryInterface(sis, result);
    }
    else if (headers) {
      nsMemory::Free(buf); // Cleanup the memory if the data was copied.
    }
  } else {
    nsCOMPtr<nsILocalFile> file; // tmp file will be deleted on release of stream
    nsCOMPtr<nsIInputStream> fileStream;
    if (NS_SUCCEEDED(rv = NS_NewNativeLocalFile(nsDependentCString(data), PR_FALSE, getter_AddRefs(file))) &&
        NS_SUCCEEDED(rv = NS_NewLocalFileInputStream(getter_AddRefs(fileStream),
                                                     file,
                                                     PR_RDONLY,
                                                     0600,
                                                     nsIFileInputStream::DELETE_ON_CLOSE |
                                                     nsIFileInputStream::CLOSE_ON_EOF))) {
      // wrap the file stream with a buffered input stream
      return NS_NewBufferedInputStream(result, fileStream, 8192);
    }
  }
  return rv;
}
#endif
%}