1// Copyright 2014 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
5#ifndef UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_
6#define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_
7
8#include "ui/accessibility/ax_enums.h"
9#include "ui/accessibility/ax_export.h"
10#include "ui/gfx/geometry/vector2d.h"
11#include "ui/gfx/native_widget_types.h"
12
13namespace ui {
14
15struct AXNodeData;
16class AXPlatformNode;
17
18class AX_EXPORT AXPlatformNodeDelegate {
19 public:
20  // Get the accessibility data that should be exposed for this node.
21  virtual AXNodeData* GetData() = 0;
22
23  // Get the parent of the node unless it's the root, then it returns NULL.
24  virtual gfx::NativeViewAccessible GetParent() = 0;
25
26  // Get the number of children of this node.
27  virtual int GetChildCount() = 0;
28
29  // Get the child of a node from [0...GetChildCount() - 1]
30  virtual gfx::NativeViewAccessible ChildAtIndex(int index) = 0;
31
32  // Get the offset to convert local coordinates to screen global coordinates.
33  virtual gfx::Vector2d GetGlobalCoordinateOffset() = 0;
34
35  //
36  // Events.
37  //
38  virtual void NotifyAccessibilityEvent(ui::AXEvent event_type) = 0;
39
40};
41
42}  // namespace ui
43
44#endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_
45