accessibility_plugin.h

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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_PLUGIN_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_ACCESSIBILITY_PLUGIN_H_
 
#include <string_view>
 
#include "flutter/fml/macros.h"
#include "flutter/shell/platform/common/client_wrapper/include/flutter/binary_messenger.h"
 
namespace flutter {
 
using FlutterViewId = int64_t;
class FlutterWindowsEngine;
 
// Handles messages on the flutter/accessibility channel.
//
// See:
// https://api.flutter.dev/flutter/semantics/SemanticsService-class.html
class AccessibilityPlugin {
 public:
  explicit AccessibilityPlugin(FlutterWindowsEngine* engine);
 
  // Begin handling accessibility messages on the `binary_messenger`.
  static void SetUp(BinaryMessenger* binary_messenger,
                    AccessibilityPlugin* plugin);
 
  // Announce a message through the assistive technology.
  virtual void Announce(const FlutterViewId view_id,
                        const std::string_view message);
 
 private:
  // The engine that owns this plugin.
  FlutterWindowsEngine* engine_ = nullptr;
 
  FML_DISALLOW_COPY_AND_ASSIGN(AccessibilityPlugin);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_PLATFORM_WINDOWS_ACCESSIBILITY_PLUGIN_H_