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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ACCESSIBILITY_PLATFORM_AX_FRAGMENT_ROOT_DELEGATE_WIN_H_
#define UI_ACCESSIBILITY_PLATFORM_AX_FRAGMENT_ROOT_DELEGATE_WIN_H_
#include "ui/gfx/native_widget_types.h"
namespace ui {
// Delegate interface for clients of AXFragmentRootWin. This allows the client
// to relate the fragment root to its neighbors in a loosely coupled way.
class AXFragmentRootDelegateWin {
public:
virtual ~AXFragmentRootDelegateWin() = default;
// In our design, a fragment root can have at most one child.
// See AXFragmentRootWin for more details.
virtual gfx::NativeViewAccessible GetChildOfAXFragmentRoot() = 0;
// Optionally returns a parent node for the fragment root. This is used, for
// example, to place the web content fragment at the correct spot in the
// browser UI's accessibility tree.
// If a fragment root returns no parent, the OS will use HWND parent-child
// relationships to establish the fragment root's location in the tree.
virtual gfx::NativeViewAccessible GetParentOfAXFragmentRoot() = 0;
// Return true if the window should be treated as an accessible control or
// false if the window should be considered a structural detail that should
// not be exposed to assistive technology users. See AXFragmentRootWin for
// more details.
virtual bool IsAXFragmentRootAControlElement() = 0;
protected:
AXFragmentRootDelegateWin() = default;
};
} // namespace ui
#endif // UI_ACCESSIBILITY_PLATFORM_AX_FRAGMENT_ROOT_DELEGATE_WIN_H_
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