/* -*- Mode: C++; tab-width: 8; 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 "nsIMIMEInfo.idl"
#include "nsIWebContentHandlerRegistrar.idl"

interface nsIRequest;

[scriptable, uuid(eb361098-5158-4b21-8f98-50b445f1f0b2)]
interface nsIWebContentHandlerInfo : nsIHandlerApp
{
  /**
   * The content type handled by the handler
   */
  readonly attribute AString contentType;

  /**
   * The uri of the handler, with an embedded %s where the URI of the loaded
   * document will be encoded.
   */
  readonly attribute AString uri;

  /** 
   * Gets the service URL Spec, with the loading document URI encoded in it.
   * @param   uri
   *          The URI of the document being loaded
   * @returns The URI of the service with the loading document URI encoded in 
   *          it.
   */
  AString getHandlerURI(in AString uri);
};

[scriptable, uuid(de7cc06e-e778-45cb-b7db-7a114e1e75b1)]
interface nsIWebContentConverterService : nsIWebContentHandlerRegistrar
{
  /**
   * Specifies the handler to be used to automatically handle all links of a
   * certain content type from now on. 
   * @param   contentType
   *          The content type to automatically load with the specified handler
   * @param   handler
   *          A web service handler. If this is null, no automatic action is
   *          performed and the user must choose.
   * @throws  NS_ERROR_NOT_AVAILABLE if the service refered to by |handler| is 
   *          not already registered.
   */
  void setAutoHandler(in AString contentType, in nsIWebContentHandlerInfo handler);

  /**
   * Gets the auto handler specified for a particular content type
   * @param   contentType
   *          The content type to look up an auto handler for.
   * @returns The web service handler that will automatically handle all 
   *          documents of the specified type. null if there is no automatic
   *          handler. (Handlers may be registered, just none of them specified
   *          as "automatic").
   */
  nsIWebContentHandlerInfo getAutoHandler(in AString contentType);

  /**
   * Gets a web handler for the specified service URI
   * @param   contentType
   *          The content type of the service being located
   * @param   uri
   *          The service URI of the handler to locate.
   * @returns A web service handler that uses the specified uri.
   */
  nsIWebContentHandlerInfo getWebContentHandlerByURI(in AString contentType, 
                                                     in AString uri);

  /**
   * Loads the preferred handler when content of a registered type is about
   * to be loaded.
   * @param   request
   *          The nsIRequest for the load of the content
   */
  void loadPreferredHandler(in nsIRequest request);

  /**
   * Removes a registered protocol handler
   * @param   protocol
   *          The protocol scheme to remove a service handler for
   * @param   uri
   *          The uri of the service handler to remove
   */
  void removeProtocolHandler(in AString protocol, in AString uri);

  /**
   * Removes a registered content handler
   * @param   contentType
   *          The content type to remove a service handler for
   * @param   uri
   *          The uri of the service handler to remove
   */
  void removeContentHandler(in AString contentType, in AString uri);

  /**
   * Gets the list of content handlers for a particular type.
   * @param   contentType
   *          The content type to get handlers for
   * @returns An array of nsIWebContentHandlerInfo objects
   */
  void getContentHandlers(in AString contentType,
                          [optional] out unsigned long count,
                          [retval,array,size_is(count)] out nsIWebContentHandlerInfo handlers);

  /**
   * Resets the list of available content handlers to the default set from
   * the distribution.
   * @param   contentType
   *          The content type to reset handlers for
   */
  void resetHandlersForType(in AString contentType);
};