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// Copyright 2024 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_NODE_ID_DELEGATE_H_
#define UI_ACCESSIBILITY_PLATFORM_AX_NODE_ID_DELEGATE_H_
#include "base/component_export.h"
#include "base/types/pass_key.h"
#include "ui/accessibility/ax_node_id_forward.h"
#include "ui/accessibility/platform/ax_platform_node_id.h"
namespace ui {
// A delegate for a tree manager that is responsible for assigning identifiers
// to nodes suitable for transmission to an accessibility tool. Generally, such
// identifiers must be unique within their containing native window.
class COMPONENT_EXPORT(AX_PLATFORM) AXNodeIdDelegate {
public:
AXNodeIdDelegate(const AXNodeIdDelegate&) = delete;
AXNodeIdDelegate& operator=(const AXNodeIdDelegate&) = delete;
virtual ~AXNodeIdDelegate() = default;
// Returns the platform node identifier for a given blink node identifier.
virtual AXPlatformNodeId GetOrCreateAXNodeUniqueId(AXNodeID ax_node_id) = 0;
// Notifies the delegate that a blink node has been removed from the tree.
virtual void OnAXNodeDeleted(AXNodeID ax_node_id) = 0;
protected:
using PassKey = base::PassKey<AXNodeIdDelegate>;
AXNodeIdDelegate() = default;
// Returns a PassKey to be used by implementations so that they may create
// AXPlatformNodeId instances with values of their own choosing.
static constexpr PassKey MakePassKey() { return PassKey(); }
};
} // namespace ui
#endif // UI_ACCESSIBILITY_PLATFORM_AX_NODE_ID_DELEGATE_H_
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