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// Copyright 2017 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.
#include "ui/accessibility/ax_action_data.h"
namespace ui {
// Classes that host an accessibility tree in the browser process that also wish
// to become visible to accessibility clients (e.g. for relaying targets to
// source accessibility trees), can subclass this delegate.
// Subclasses can use |tree_id| when annotating their |AXNodeData| for clients
// to respond with the appropriate target node id.
class AX_EXPORT AXHostDelegate {
virtual ~AXHostDelegate();
// Handle an action from an accessibility client.
virtual void PerformAction(const ui::AXActionData& data) = 0;
// A delegate with an automatically assigned tree id.
// A delegate with an explicit tree id. The caller is responsible for ensuring
// the uniqueness of the id.
explicit AXHostDelegate(int32_t tree_id);
// A tree id appropriate for annotating events sent to an accessibility
// client.
int32_t tree_id() const { return tree_id_; }
// Register or unregister this class with |AXTreeIDRegistry|.
void UpdateActiveState(bool active);
int32_t tree_id_;
} // namespace ui