| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_ACCESSIBILITY_AX_COORDINATE_SYSTEM_H_ |
| #define UI_ACCESSIBILITY_AX_COORDINATE_SYSTEM_H_ |
| |
| namespace ui { |
| |
| // The coordinate system of bounds or points. The origin for all coordinate |
| // systems is the upper left hand corner of the region. Frame coordinates |
| // correspond to the current frame and root frame coordinates are relative to |
| // the topmost accessibility tree of the same type. For web content, root frame |
| // coordinates are relative to the root frame of the web page. From within an |
| // accessibility tree whose root is an iframe, frame coordinates are relative to |
| // the region of the iframe. From an iframe leaf accessibility node, frame |
| // coordinates are relative to the containing accessibility tree. For native UI, |
| // frame coordinates are relative to the current window whereas root frame |
| // coordinates are relative to the top-level window. The frame coordinates are |
| // equivalent to the root frame coordinates when the current accessibility tree |
| // is the root accessibility tree. |
| // kScreen: Relative to the screen space on the user's device |
| // kRootFrame: Relative to the top-level accessibility tree of the same type |
| // kFrame: Relative to the current accessibility tree |
| enum class AXCoordinateSystem { kScreen, kRootFrame, kFrame }; |
| } // namespace ui |
| |
| #endif // UI_ACCESSIBILITY_AX_COORDINATE_SYSTEM_H_ |
