preparo dependencia editor, y D4rtEditingController

lib/ai/formula_screen.dart

@@ -21,9 +21,42 @@ class FormulaScreen extends StatefulWidget {
   State<FormulaScreen> createState() => _FormulaScreenState();
 }
 
+//// Start of D4rtEditingController class ////
+class D4rtEditingController extends TextEditingController {
+  String? _lastError;
+
+  String? get lastError => _lastError;
+
+  D4rtEditingController({String? text}) : super(text: text);
+
+  bool validate() {
+    try {
+      FormulaEvaluator.evaluateExpression(text);
+      _lastError = null;
+      return true;
+    } catch (e) {
+      _lastError = e.toString();
+      return false;
+    }
+  }
+
+  @override
+  set text(String newText) {
+    super.text = newText;
+    validate();
+  }
+
+  @override
+  void notifyListeners() {
+    validate();
+    super.notifyListeners();
+  }
+}
+//// End of D4rtEditingController class ////
+
 class _FormulaScreenState extends State<FormulaScreen> {
   final _formKey = GlobalKey<FormState>();
-  final Map<String, TextEditingController> _inputControllers = {};
+  final Map<String, D4rtEditingController> _inputControllers = {};
   final Map<String, String?> _selectedUnits = {};
   String? _result;
   String? _selectedOutputUnit;
@@ -33,7 +66,7 @@ class _FormulaScreenState extends State<FormulaScreen> {
     super.initState();
     // Initialize controllers and units with listeners
     for (final input in widget.formula.input) {
-      _inputControllers[input.name] = TextEditingController();
+      _inputControllers[input.name] = D4rtEditingController();
       _selectedUnits[input.name] = input.unit;
       _inputControllers[input.name]!.addListener(_evaluateFormula);
     }
@@ -235,7 +268,7 @@ class _FormulaScreenState extends State<FormulaScreen> {
                 if (value == null || value.isEmpty) {
                   return 'Required';
                 }
-                return null;
+                return _inputControllers[variable.name]!.lastError;
               },
             ),
           ),

lib/defaults/formulas.d4rt

@@ -1,4 +1,15 @@
 [
+
+{
+  "name": "Temperature converter",
+  "description": "Example of simple formula, just unit conversion",
+  "input": [
+    {"name": "Input", "unit": "Celsius" }
+  ],
+  "output": {"name": "Output", "unit": "Kelvin" },
+  "d4rtCode": "Output = Input;",
+  "tags": ["converter", "temperature" ]
+},
   // Free fall distance (vertical)
   {
     "name": "Free Fall Distance",

lib/formula_evaluator.dart

@@ -67,9 +67,11 @@ class FormulaEvaluator {
       import "package:d4rt_formulas.dart";
       main()
       {
-        return $code;
+        late var result;
+        result = $code;
+        return result;
       }""";
-    print("evaluateExpression:\n$d4rtCode");
+    //print("evaluateExpression:\n$d4rtCode");
     final result = interpreter.execute(source: d4rtCode);
     return result.toDouble();
   }

pubspec.lock

@@ -33,6 +33,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.13.0"
+  autotrie:
+    dependency: transitive
+    description:
+      name: autotrie
+      sha256: "55da6faefb53cfcb0abb2f2ca8636123fb40e35286bb57440d2cf467568188f8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -49,6 +57,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      sha256: fb0f1107cac15a5ea6ef0a6ef71a807b9e4267c713bb93e00e92d737cc8dbd8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
   cli_config:
     dependency: transitive
     description:
@@ -113,6 +129,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.1.4"
+  equatable:
+    dependency: transitive
+    description:
+      name: equatable
+      sha256: "567c64b3cb4cf82397aac55f4f0cbd3ca20d77c6c03bedbc4ceaddc08904aef7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.7"
   fake_async:
     dependency: transitive
     description:
@@ -134,6 +158,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_code_editor:
+    dependency: "direct main"
+    description:
+      name: flutter_code_editor
+      sha256: "9af48ba8e3558b6ea4bb98b84c5eb1649702acf53e61a84d88383eeb79b239b0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5"
   flutter_d4rt:
     dependency: "direct main"
     description:
@@ -142,6 +174,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.0.3"
+  flutter_highlight:
+    dependency: transitive
+    description:
+      name: flutter_highlight
+      sha256: "7b96333867aa07e122e245c033b8ad622e4e3a42a1a2372cbb098a2541d8782c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -163,6 +203,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   frontend_server_client:
     dependency: transitive
     description:
@@ -179,6 +224,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.3"
+  highlight:
+    dependency: transitive
+    description:
+      name: highlight
+      sha256: "5353a83ffe3e3eca7df0abfb72dcf3fa66cc56b953728e7113ad4ad88497cf21"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
+  hive:
+    dependency: transitive
+    description:
+      name: hive
+      sha256: "8dcf6db979d7933da8217edcec84e9df1bdb4e4edc7fc77dbd5aa74356d6d941"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.3"
   http:
     dependency: transitive
     description:
@@ -243,6 +304,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.2"
+  linked_scroll_controller:
+    dependency: transitive
+    description:
+      name: linked_scroll_controller
+      sha256: e6020062bcf4ffc907ee7fd090fa971e65d8dfaac3c62baf601a3ced0b37986a
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   lints:
     dependency: transitive
     description:
@@ -299,6 +368,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  mocktail:
+    dependency: transitive
+    description:
+      name: mocktail
+      sha256: "890df3f9688106f25755f26b1c60589a92b3ab91a22b8b224947ad041bf172d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
   node_preamble:
     dependency: transitive
     description:
@@ -323,6 +400,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
   pool:
     dependency: transitive
     description:
@@ -347,6 +432,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.2"
+  scrollable_positioned_list:
+    dependency: transitive
+    description:
+      name: scrollable_positioned_list
+      sha256: "1b54d5f1329a1e263269abc9e2543d90806131aa14fe7c6062a8054d57249287"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.8"
   shelf:
     dependency: transitive
     description:
@@ -464,6 +557,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.12"
+  tuple:
+    dependency: transitive
+    description:
+      name: tuple
+      sha256: a97ce2013f240b2f3807bcbaf218765b6f301c3eff91092bcfa23a039e7dd151
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
   typed_data:
     dependency: transitive
     description:
@@ -472,6 +573,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  url_launcher:
+    dependency: transitive
+    description:
+      name: url_launcher
+      sha256: f6a7e5c4835bb4e3026a04793a4199ca2d14c739ec378fdfe23fc8075d0439f8
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.2"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      sha256: "5c8b6c2d89a78f5a1cca70a73d9d5f86c701b36b42f9c9dac7bad592113c28e9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.24"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      sha256: d80b3f567a617cb923546034cc94bfe44eb15f989fe670b37f26abdb9d939cb7
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.4"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      sha256: "4e9ba368772369e3e08f231d2301b4ef72b9ff87c31192ef471b380ef29a4935"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      sha256: c043a77d6600ac9c38300567f33ef12b0ef4f4783a2c1f00231d2b1941fea13f
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.3"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      sha256: "552f8a1e663569be95a8190206a38187b531910283c3e982193e4f2733f01029"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      sha256: "4bd2b7b4dc4d4d0b94e5babfffbca8eac1a126c7f3d6ecbc1a11013faa3abba2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      sha256: "3284b6d2ac454cf34f114e1d3319866fdd1e19cdc329999057e44ffe936cfa77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.4"
   vector_math:
     dependency: transitive
     description:
@@ -537,5 +702,5 @@ packages:
     source: hosted
     version: "3.1.3"
 sdks:
-  dart: ">=3.8.1 <4.0.0"
+  dart: ">=3.9.0 <4.0.0"
-  flutter: ">=3.19.0"
+  flutter: ">=3.35.0"

pubspec.yaml

@@ -38,6 +38,7 @@ dependencies:
   d4rt:
   flutter_d4rt:
   flutter_markdown: ^0.6.0
+  flutter_code_editor:
 
   collection: any
 dev_dependencies: