ui/base/win/accessibility_ids_win.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 #ifndef UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
   5 #define UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
   6
   7 namespace base {
   8 namespace win {
   9
  10 // Windows accessibility (MSAA) notifications are posted on an
  11 // accessible object using its owning HWND and a long integer child id.
  12 // Positive child ids can be used to enumerate the children of an object,
  13 // so in Chromium we use only negative values to represent ids of specific
  14 // accessible objects.
  15 //
  16 // Chromium currently has two separate systems that use accessibility ids:
  17 // * views (ui/views/accessibility), and
  18 // * web (content/browser/accessibility)
  19 //
  20 // These constants ensure they use non-overlapping id ranges.
  21
  22 const long kFirstViewsAccessibilityId = -1;
  23 const long kLastViewsAccessibilityId = -999;
  24 const long kFirstBrowserAccessibilityManagerAccessibilityId = -1000;
  25 const long kLastBrowserAccessibilityManagerAccessibilityId = INT_MIN;
  26
  27 }  // win
  28 }  // base
  29
  30 #endif  // UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_