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// Copyright 2013 The Flutter 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 FLUTTER_SHELL_PLATFORM_WINDOWS_ACCESSIBILITY_BRIDGE_DELEGATE_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_ACCESSIBILITY_BRIDGE_DELEGATE_H_
#include "flutter/shell/platform/common/accessibility_bridge.h"
#include "flutter/shell/platform/windows/flutter_platform_node_delegate_windows.h"
#include "flutter/shell/platform/windows/flutter_windows_engine.h"
namespace flutter {
class FlutterWindowsEngine;
// The Win32 implementation of AccessibilityBridgeDelegate.
//
// Handles requests from the accessibility bridge to interact with Windows
// accessibility APIs. This includes routing accessibility events fired from
// the framework to Windows, routing native Windows accessibility events to the
// framework, and creating Windows-specific FlutterPlatformNodeDelegate objects
// for each node in the semantics tree.
class AccessibilityBridgeDelegateWindows
: public AccessibilityBridge::AccessibilityBridgeDelegate {
public:
explicit AccessibilityBridgeDelegateWindows(FlutterWindowsEngine* engine);
virtual ~AccessibilityBridgeDelegateWindows() = default;
// |AccessibilityBridge::AccessibilityBridgeDelegate|
void OnAccessibilityEvent(
ui::AXEventGenerator::TargetedEvent targeted_event) override;
// |AccessibilityBridge::AccessibilityBridgeDelegate|
void DispatchAccessibilityAction(AccessibilityNodeId target,
FlutterSemanticsAction action,
fml::MallocMapping data) override;
// |AccessibilityBridge::AccessibilityBridgeDelegate|
std::shared_ptr<FlutterPlatformNodeDelegate>
CreateFlutterPlatformNodeDelegate() override;
// Dispatches a Windows accessibility event of the specified type, generated
// by the accessibility node associated with the specified semantics node.
virtual void DispatchWinAccessibilityEvent(
std::shared_ptr<FlutterPlatformNodeDelegateWindows> node_delegate,
DWORD event_type);
// Sets the accessibility focus to the accessibility node associated with the
// specified semantics node.
virtual void SetFocus(
std::shared_ptr<FlutterPlatformNodeDelegateWindows> node_delegate);
private:
FlutterWindowsEngine* engine_;
};
} // namespace flutter
#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_ACCESSIBILITY_BRIDGE_DELEGATE_H_