widget/nsITaskbarOverlayIconController.idl

   1 /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsISupports.idl"
   8
   9 interface imgIContainer;
  10 interface nsIURI;
  11 interface nsISVGPaintContext;
  12
  13 /**
  14  * Starting in Windows 7, applications can display an overlay on the icon in
  15  * the taskbar. This class wraps around the native functionality to do this.
  16  */
  17 [scriptable, uuid(b1858889-a698-428a-a14b-b5d60cff6de2)]
  18 interface nsITaskbarOverlayIconController : nsISupports
  19 {
  20   /**
  21    * Sets the overlay icon and its corresponding alt text.
  22    *
  23    * @param statusIcon The handle to the overlay icon. The icon will be scaled
  24    *                   to the small icon size (16x16 at 96 dpi). Can be null, in
  25    *                   which case if the taskbar button represents a single window
  26    *                   the icon is removed.
  27    * @param statusDescription The alt text version of the information
  28    *                          conveyed by the overlay, for accessibility
  29    *                          purposes.
  30    * @param paintContext Optional context information used when passing an SVG
  31    *                     image. This allows the caller to set the context-fill
  32    *                     and context-stroke properties that would normally
  33    *                     be provided by CSS.
  34    *
  35    * @note The behavior for window groups is managed by Windows.
  36    * - If an overlay icon is set for any window in a window group and another
  37    *   overlay icon is already applied to the corresponding taskbar button, that
  38    *   existing overlay is replaced.
  39    * - If null is passed in to replace the overlay currently being displayed,
  40    *   and if a previous overlay set for a different window in the group is
  41    *   still available, then that previous overlay is displayed.
  42    */
  43   void setOverlayIcon(in imgIContainer statusIcon,
  44                       in AString statusDescription,
  45                       [optional] in nsISVGPaintContext paintContext);
  46 };