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_ 31
