refactor: Add Stac Theme and ThemeData classes to stac_core (#379)

* refactor: Move theme classes to Stac_core

* refactor: Update theme parsers and add missing docs.

* chore: Remove FVM configuration files

* refactor: Update StacTabBarThemeData parser to use TabBarThemeData and include in StacThemeParser

* chore: Remove .fvmrc file from stac_core package

* refactor: Change return type of parse method in StacAppBarThemeParser to non-nullable AppBarTheme

* refactor: Update theme parsers to return non-nullable types and improve documentation

* refactor: Remove unused StacRoundedRectangleBorder class and related files

* code formatting

* refactor: Clean up JSON serialization in widget classes for consistency

- Updated various widget classes to ensure consistent formatting in JSON serialization.
- Simplified null checks and improved readability across multiple files, including StacButton, StacCard, StacColumn, and others.
- Enhanced maintainability by standardizing the structure of child widget handling and property parsing.

Author: divyanshub024

.gitignore

@@ -41,3 +41,6 @@ mason-lock.json
 
 # Cursor Files
 .cursor/
+
+# FVM Version Cache
+.fvm/

examples/movie_app/pubspec.lock

@@ -171,14 +171,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  freezed_annotation:
-    dependency: transitive
-    description:
-      name: freezed_annotation
-      sha256: "7294967ff0a6d98638e7acb774aac3af2550777accd8149c90af5b014e6d44d8"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.0"
   http:
     dependency: transitive
     description:

packages/stac/lib/src/framework/stac.dart

@@ -10,10 +10,8 @@ import 'package:stac_core/actions/network_request/stac_network_request.dart';
 import 'package:stac_core/core/stac_options.dart';
 import 'package:stac_framework/stac_framework.dart';
 
-typedef ErrorWidgetBuilder = Widget Function(
-  BuildContext context,
-  dynamic error,
-);
+typedef ErrorWidgetBuilder =
+    Widget Function(BuildContext context, dynamic error);
 
 typedef LoadingWidgetBuilder = Widget Function(BuildContext context);
 
@@ -31,10 +29,8 @@ typedef LoadingWidgetBuilder = Widget Function(BuildContext context);
 ///   },
 /// );
 /// ```
-typedef StacErrorWidgetBuilder = Widget Function(
-  BuildContext context,
-  StacError errorDetails,
-);
+typedef StacErrorWidgetBuilder =
+    Widget Function(BuildContext context, StacError errorDetails);
 
 class Stac extends StatelessWidget {
   const Stac({
@@ -79,10 +75,7 @@ class Stac extends StatelessWidget {
     );
   }
 
-  static Widget? fromJson(
-    Map<String, dynamic>? json,
-    BuildContext context,
-  ) {
+  static Widget? fromJson(Map<String, dynamic>? json, BuildContext context) {
     return StacService.fromJson(json, context);
   }
 
@@ -139,10 +132,7 @@ class _StacView extends StatelessWidget {
     }
 
     return FutureBuilder<Response?>(
-      future: StacCloud.fetchScreen(
-        context: context,
-        routeName: routeName,
-      ),
+      future: StacCloud.fetchScreen(context: context, routeName: routeName),
       builder: (context, snapshot) {
         if (snapshot.connectionState == ConnectionState.waiting) {
           return loadingWidget ?? const _LoadingWidget();
@@ -166,10 +156,6 @@ class _LoadingWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      body: const Center(
-        child: CircularProgressIndicator(),
-      ),
-    );
+    return Scaffold(body: const Center(child: CircularProgressIndicator()));
   }
 }

packages/stac/lib/src/framework/stac_app.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:stac/src/parsers/theme/stac_theme/stac_theme.dart';
+import 'package:stac/src/parsers/theme/themes.dart';
 
 class StacApp extends StatelessWidget {
   const StacApp({
@@ -41,11 +41,11 @@ class StacApp extends StatelessWidget {
     this.restorationScopeId,
     this.scrollBehavior,
     this.useInheritedMediaQuery = false,
-  })  : routeInformationProvider = null,
-        routeInformationParser = null,
-        routerDelegate = null,
-        backButtonDispatcher = null,
-        routerConfig = null;
+  }) : routeInformationProvider = null,
+       routeInformationParser = null,
+       routerDelegate = null,
+       backButtonDispatcher = null,
+       routerConfig = null;
 
   const StacApp.router({
     super.key,
@@ -82,14 +82,14 @@ class StacApp extends StatelessWidget {
     this.restorationScopeId,
     this.scrollBehavior,
     this.useInheritedMediaQuery = false,
-  })  : navigatorObservers = null,
-        navigatorKey = null,
-        onGenerateRoute = null,
-        homeBuilder = null,
-        onGenerateInitialRoutes = null,
-        onUnknownRoute = null,
-        routes = null,
-        initialRoute = null;
+  }) : navigatorObservers = null,
+       navigatorKey = null,
+       onGenerateRoute = null,
+       homeBuilder = null,
+       onGenerateInitialRoutes = null,
+       onUnknownRoute = null,
+       routes = null,
+       initialRoute = null;
 
   final GlobalKey<NavigatorState>? navigatorKey;
   final GlobalKey<ScaffoldMessengerState>? scaffoldMessengerKey;

packages/stac/lib/src/framework/stac_error.dart

@@ -35,12 +35,7 @@ class StacError {
   /// The [error] parameter is required and should contain the actual
   /// error or exception that was thrown. All other parameters are optional
   /// but recommended for better error diagnostics.
-  const StacError({
-    this.type,
-    required this.error,
-    this.json,
-    this.stackTrace,
-  });
+  const StacError({this.type, required this.error, this.json, this.stackTrace});
 
   /// The type identifier of the failing Stac entity.
   ///
@@ -117,10 +112,7 @@ class StacError {
 /// )
 /// ```
 class StacErrorWidget extends StatefulWidget {
-  const StacErrorWidget({
-    super.key,
-    required this.errorDetails,
-  });
+  const StacErrorWidget({super.key, required this.errorDetails});
 
   final StacError errorDetails;
 
@@ -212,16 +204,16 @@ class _StacErrorWidgetState extends State<StacErrorWidget> {
             child: Row(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                const Icon(Icons.warning_amber,
-                    color: _warningOrange, size: 16),
+                const Icon(
+                  Icons.warning_amber,
+                  color: _warningOrange,
+                  size: 16,
+                ),
                 const SizedBox(width: 8),
                 Expanded(
                   child: Text(
                     widget.errorDetails.error.toString(),
-                    style: const TextStyle(
-                      color: _errorRed,
-                      fontSize: 13,
-                    ),
+                    style: const TextStyle(color: _errorRed, fontSize: 13),
                   ),
                 ),
               ],
@@ -239,9 +231,7 @@ class _StacErrorWidgetState extends State<StacErrorWidget> {
               _buildExpandableSection(
                 title: 'JSON Data',
                 section: _ExpandableSection.json,
-                child: _buildCodeBlock(
-                  _formatJson(widget.errorDetails.json!),
-                ),
+                child: _buildCodeBlock(_formatJson(widget.errorDetails.json!)),
               ),
               const SizedBox(height: 8),
             ],
@@ -391,18 +381,16 @@ class _StacErrorWidgetState extends State<StacErrorWidget> {
             ),
           ),
         ),
-        if (isExpanded) ...[
-          const SizedBox(height: 4),
-          child,
-        ],
+        if (isExpanded) ...[const SizedBox(height: 4), child],
       ],
     );
   }
 
   String _getTroubleshootingTips() {
     final errorStr = widget.errorDetails.error.toString().toLowerCase();
-    final errorType =
-        widget.errorDetails.error.runtimeType.toString().toLowerCase();
+    final errorType = widget.errorDetails.error.runtimeType
+        .toString()
+        .toLowerCase();
 
     // Check for unregistered widget/action types
     if (errorStr.contains('type') && errorStr.contains('not found')) {

packages/stac/lib/src/framework/stac_registry.dart

@@ -50,24 +50,22 @@ class StacRegistry {
     }
   }
 
-  Future<dynamic> registerAll(List<StacParser> parsers,
-      [bool override = false]) {
-    return Future.forEach(
-      parsers,
-      (StacParser parser) {
-        return register(parser, override);
-      },
-    );
+  Future<dynamic> registerAll(
+    List<StacParser> parsers, [
+    bool override = false,
+  ]) {
+    return Future.forEach(parsers, (StacParser parser) {
+      return register(parser, override);
+    });
   }
 
-  Future<dynamic> registerAllActions(List<StacActionParser> parsers,
-      [bool override = false]) {
-    return Future.forEach(
-      parsers,
-      (StacActionParser parser) {
-        return registerAction(parser, override);
-      },
-    );
+  Future<dynamic> registerAllActions(
+    List<StacActionParser> parsers, [
+    bool override = false,
+  ]) {
+    return Future.forEach(parsers, (StacActionParser parser) {
+      return registerAction(parser, override);
+    });
   }
 
   StacParser<dynamic>? getParser(String type) {

packages/stac/lib/src/framework/stac_service.dart

@@ -173,10 +173,7 @@ class StacService {
     _errorWidgetBuilder = errorWidgetBuilder;
   }
 
-  static Widget? fromJson(
-    Map<String, dynamic>? json,
-    BuildContext context,
-  ) {
+  static Widget? fromJson(Map<String, dynamic>? json, BuildContext context) {
     try {
       if (json == null) {
         return null;
@@ -318,8 +315,9 @@ class StacService {
         throw TypeError();
       }
 
-      final stacActionParser =
-          StacRegistry.instance.getActionParser(actionType);
+      final stacActionParser = StacRegistry.instance.getActionParser(
+        actionType,
+      );
 
       if (stacActionParser == null) {
         Log.w('Action type [$actionType] not supported');

packages/stac/lib/src/parsers/actions/stac_dialog_action/stac_dialog_action_parser.dart

@@ -26,11 +26,7 @@ class StacDialogActionParser extends StacActionParser<StacDialogAction> {
         Stac.fromJson(model.widget, context) ?? const SizedBox(),
       );
     } else if (model.assetPath?.isNotEmpty ?? false) {
-      return _showDialog(
-        context,
-        model,
-        Stac.fromAssets(model.assetPath!),
-      );
+      return _showDialog(context, model, Stac.fromAssets(model.assetPath!));
     } else if (model.request != null) {
       return _showDialog(
         context,

packages/stac/lib/src/parsers/actions/stac_navigate_action/stac_navigate_action_parser.dart

@@ -81,11 +81,7 @@ class StacNavigateActionParser extends StacActionParser<StacNavigateAction> {
         break;
 
       case NavigationStyle.pushNamed:
-        return Navigator.pushNamed(
-          context,
-          routeName!,
-          arguments: arguments,
-        );
+        return Navigator.pushNamed(context, routeName!, arguments: arguments);
 
       case NavigationStyle.pushNamedAndRemoveAll:
         return Navigator.pushNamedAndRemoveUntil(

packages/stac/lib/src/parsers/actions/stac_snack_bar/stac_snack_bar_parser.dart

@@ -53,7 +53,9 @@ class StacSnackBarParser extends StacActionParser<StacSnackBar> {
   }
 
   SnackBarAction? _parseAction(
-      BuildContext context, StacSnackBarAction? action) {
+    BuildContext context,
+    StacSnackBarAction? action,
+  ) {
     if (action == null) return null;
     return SnackBarAction(
       textColor: action.textColor?.toColor(context),