File: nsIHelperAppLauncherDialog.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 nsIHelperAppLauncher;
interface nsIFile;

/**
 * This interface is used to display a confirmation dialog before
 * launching a "helper app" to handle content not handled by
 * Mozilla.
 *
 * Usage:  Clients (of which there is one: the nsIExternalHelperAppService
 * implementation in mozilla/uriloader/exthandler) create an instance of
 * this interface (using the contract ID) and then call the show() method.
 *
 * The dialog is shown non-modally.  The implementation of the dialog
 * will access methods of the nsIHelperAppLauncher passed in to show()
 * in order to cause a "save to disk" or "open using" action.
 */
[scriptable, uuid(bfc739f3-8d75-4034-a6f8-1039a5996bad)]
interface nsIHelperAppLauncherDialog : nsISupports {
  /**
   * This request is passed to the helper app dialog because Gecko can not
   * handle content of this type.
   */
  const unsigned long REASON_CANTHANDLE = 0;

  /**
   * The server requested external handling.
   */
  const unsigned long REASON_SERVERREQUEST = 1;

  /**
   * Gecko detected that the type sent by the server (e.g. text/plain) does
   * not match the actual type.
   */
  const unsigned long REASON_TYPESNIFFED = 2;

  /**
   * Show confirmation dialog for launching application (or "save to
   * disk") for content specified by aLauncher.
   *
   * @param aLauncher
   *        A nsIHelperAppLauncher to be invoked when a file is selected.
   * @param aWindowContext
   *        Window associated with action.
   * @param aReason
   *        One of the constants from above. It indicates why the dialog is
   *        shown. Implementors should treat unknown reasons like
   *        REASON_CANTHANDLE.
   */
  void show(in nsIHelperAppLauncher aLauncher,
            in nsISupports aWindowContext,
            in unsigned long aReason);

  /**
   * Async invoke a save-to-file dialog instead of the full fledged helper app
   * dialog. When the file is chosen (or the dialog is closed), the callback
   * in aLauncher (aLauncher.saveDestinationAvailable) is called with the
   * selected file.
   *
   * @param aLauncher
   *        A nsIHelperAppLauncher to be invoked when a file is selected.
   * @param aWindowContext
   *        Window associated with action.
   * @param aDefaultFileName
   *        Default file name to provide (can be null)
   * @param aSuggestedFileExtension
   *        Sugested file extension
   * @param aForcePrompt
   *        Set to true to force prompting the user for thet file
   *        name/location, otherwise perferences may control if the user is
   *        prompted.
   */
  void promptForSaveToFileAsync(in nsIHelperAppLauncher aLauncher,
                                in nsISupports aWindowContext,
                                in wstring aDefaultFileName,
                                in wstring aSuggestedFileExtension,
                                in boolean aForcePrompt);
};


%{C++
#define NS_HELPERAPPLAUNCHERDLG_CONTRACTID    "@mozilla.org/helperapplauncherdialog;1"
%}