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/* -*- Mode: IDL; tab-width: 2; 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 nsIMsgAsyncPromptListener;

/**
 * The nsIMsgAsyncPrompter is intended to provide a way to make asynchoronous
 * message prompts into synchronous ones - so that the user is only prompted
 * with one at a time.
 */
[scriptable, uuid(15f67d0f-947a-4a1e-8f72-6ab7162b4b9c)]
interface nsIMsgAsyncPrompter : nsISupports {
  /**
   * Queues an async prompt request. If there are none queued then this will be
   * actioned straight away, otherwise the prompt will be queued for action
   * once previous prompt(s) have been cleared.
   *
   * Queued prompts using the same aKey may be amalgamated into one prompt to
   * save repeated prompts to the user.
   *
   * @param aKey    A key to determine whether or not the queued prompts can
   *                be combined.
   * @param aPromptImmediately If the user is retrying a failed password, we
   *                           need to prompt right away, even if there is a
   *                           prompt up, or prompts queued up. Note that
   *                           immediately may not be synchronously, on OS/X.
   * @param aCaller An nsIMsgAsyncPromptListener to call back to when the prompt
   *                is ready to be made.
   */
  void queueAsyncAuthPrompt(in ACString aKey, in boolean aPromptImmediately,
                            in nsIMsgAsyncPromptListener aCaller);
};

/**
 * This is used in combination with nsIMsgAsyncPrompter.
 */
[scriptable, uuid(fb5307a3-39d0-462e-92c8-c5c288a2612f)]
interface nsIMsgAsyncPromptListener : nsISupports {
  /**
   * Called when the listener should do its prompt. The listener
   * should not return until the prompt is complete.
   *
   * @return  True if there is auth information available following the prompt,
   *          false otherwise.
   */
  boolean onPromptStart();

  /**
   * Called in the case that the queued prompt was combined with another and
   * there is now authentication information available.
   */
  void onPromptAuthAvailable();

  /**
   * Called in the case that the queued prompt was combined with another but
   * the prompt was canceled.
   */
  void onPromptCanceled();
};