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/* vim: se cin sw=2 ts=2 et : */
/* -*- Mode: C++; 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"
#include "nsIBaseWindow.idl"

interface nsITaskbarPreviewController;

/**
 * nsITaskbarPreview
 *
 * Common interface for both window and tab taskbar previews. This interface
 * cannot be instantiated directly.
 *
 */
[scriptable, uuid(CBFDF766-D002-403B-A3D9-B091C9AD465B)]
interface nsITaskbarPreview : nsISupports
{
  /**
   * The controller for this preview. A controller is required to provide
   * the behavior and appearance of the taskbar previews. It is responsible for
   * determining the size and contents of the preview, which buttons are
   * displayed and how the application responds to user actions on the preview.
   *
   * Neither preview makes full use of the controller. See the documentation
   * for nsITaskbarWindowPreview and nsITaskbarTabPreview for details on which
   * controller methods are used.
   *
   * The controller is not allowed to be null.
   *
   * @see nsITaskbarPreviewController
   */
  attribute nsITaskbarPreviewController controller;

  /**
   * The tooltip displayed above the preview when the user hovers over it
   *
   * Default: an empty string
   */
  attribute DOMString tooltip;

  /**
   * Whether or not the preview is visible.
   *
   * Changing this option is expensive for tab previews since toggling this
   * option will destroy/create the proxy window and its registration with the
   * taskbar. If any step of that fails, an exception will be thrown.
   *
   * For window previews, this operation is very cheap.
   *
   * Default: false
   */
  attribute boolean visible;

  /**
   * Gets/sets whether or not the preview is marked active (selected) in the
   * taskbar.
   */
  attribute boolean active;

  /**
   * Invalidates the taskbar's cached image of this preview, forcing a redraw
   * if necessary
   */
  void invalidate();
};