[macos] Recovery isAccessAllowed and requestAccess methods

Author: lijy91

lib/src/screen_text_extractor.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:io';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 import 'extract_mode.dart';
@@ -17,6 +18,24 @@ class ScreenTextExtractor {
 
   ClipboardOnceWatcher _clipboardOnceWatcher = ClipboardOnceWatcher();
 
+  Future<bool> isAccessAllowed() async {
+    if (!kIsWeb && Platform.isMacOS) {
+      return await _channel.invokeMethod('isAccessAllowed');
+    }
+    return true;
+  }
+
+  Future<void> requestAccess({
+    bool onlyOpenPrefPane = false,
+  }) async {
+    if (!kIsWeb && Platform.isMacOS) {
+      final Map<String, dynamic> arguments = {
+        'onlyOpenPrefPane': onlyOpenPrefPane,
+      };
+      await _channel.invokeMethod('requestAccess', arguments);
+    }
+  }
+
   Future<ExtractedData?> extract({
     ExtractMode mode = ExtractMode.clipboard,
   }) async {
@@ -68,3 +87,5 @@ class ScreenTextExtractor {
     }
   }
 }
+
+final screenTextExtractor = ScreenTextExtractor.instance;

macos/Classes/ScreenTextExtractorPlugin.swift

@@ -11,13 +11,37 @@ public class ScreenTextExtractorPlugin: NSObject, FlutterPlugin {
 
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         switch call.method {
+        case "isAccessAllowed":
+            isAccessAllowed(call, result: result)
+            break
+        case "requestAccess":
+            requestAccess(call, result: result)
+            break
         case "simulateCtrlCKeyPress":
             simulateCtrlCKeyPress(call, result: result)
             break
         default:
             result(FlutterMethodNotImplemented)
         }
     }
+    
+    public func isAccessAllowed(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        result(AXIsProcessTrusted())
+    }
+    
+    public func requestAccess(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        let args:[String: Any] = call.arguments as! [String: Any]
+        let onlyOpenPrefPane: Bool = args["onlyOpenPrefPane"] as! Bool
+        
+        if (!onlyOpenPrefPane) {
+            let options = [kAXTrustedCheckOptionPrompt.takeRetainedValue(): true] as CFDictionary
+            AXIsProcessTrustedWithOptions(options)
+        } else  {
+            let prefpaneUrl = URL(string: "x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility")!
+            NSWorkspace.shared.open(prefpaneUrl)
+        }
+        result(true)
+    }
 
     public func simulateCtrlCKeyPress(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         let eventKeyDown = CGEvent(keyboardEventSource: nil, virtualKey: CGKeyCode(UInt32(kVK_ANSI_C)), keyDown: true);