feat: Implement HTML rendering with browser interactivity using webview_flutter: foss42#155:

Author: chetanr250

lib/consts.dart

@@ -773,6 +773,7 @@ const kLabelAddFormField = "Add Form Field";
 const kLabelNotSent = "Not Sent";
 const kLabelResponse = "Response";
 const kLabelResponseBody = "Response Body";
+const kLabelPreview = "Preview";
 const kTooltipClearResponse = "Clear Response";
 const kHeaderRow = ["Header Name", "Header Value"];
 const kLabelRequestHeaders = "Request Headers";

lib/screens/home_page/editor_pane/details_card/response_pane.dart

@@ -77,6 +77,7 @@ class ResponseTabs extends ConsumerWidget {
       children: const [
         ResponseBodyTab(),
         ResponseHeadersTab(),
+        ResponsePreviewTab(),
       ],
     );
   }
@@ -111,3 +112,16 @@ class ResponseHeadersTab extends ConsumerWidget {
     );
   }
 }
+
+class ResponsePreviewTab extends ConsumerWidget {
+  const ResponsePreviewTab({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final selectedRequestModel = ref.watch(selectedRequestModelProvider);
+    final responseModel = selectedRequestModel?.httpResponseModel;
+    return ResponsePreview(
+      responseModel: responseModel,
+    );
+  }
+}

lib/widgets/response_widgets.dart

@@ -7,6 +7,7 @@ import 'package:apidash/utils/utils.dart';
 import 'package:apidash/widgets/widgets.dart';
 import 'package:apidash/models/models.dart';
 import 'package:apidash/consts.dart';
+import 'package:webview_flutter/webview_flutter.dart';
 
 class NotSentWidget extends StatelessWidget {
   const NotSentWidget({super.key});
@@ -193,7 +194,7 @@ class _ResponseTabViewState extends State<ResponseTabView>
   void initState() {
     super.initState();
     _controller = TabController(
-      length: 2,
+      length: 3,
       animationDuration: kTabAnimationDuration,
       vsync: this,
     );
@@ -216,6 +217,9 @@ class _ResponseTabViewState extends State<ResponseTabView>
             TabLabel(
               text: kLabelHeaders,
             ),
+            TabLabel(
+              text: kLabelPreview,
+            ),
           ],
         ),
         Expanded(
@@ -518,3 +522,30 @@ class _BodySuccessState extends State<BodySuccess> {
     );
   }
 }
+
+class ResponsePreview extends StatelessWidget {
+  const ResponsePreview({super.key, required this.responseModel});
+  final responseModel;
+
+  @override
+  Widget build(BuildContext context) {
+    final controller = WebViewController()
+      ..setJavaScriptMode(JavaScriptMode.unrestricted)
+      ..setNavigationDelegate(
+        NavigationDelegate(
+          onWebResourceError: (WebResourceError error) {
+            ErrorMessage(message: error.description);
+          },
+        ),
+      );
+
+    // Load HTML content
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      controller.loadHtmlString(responseModel!.body!);
+    });
+
+    return Scaffold(
+      body: WebViewWidget(controller: controller),
+    );
+  }
+}

pubspec.lock

@@ -1700,6 +1700,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.1"
+  webview_flutter:
+    dependency: "direct main"
+    description:
+      name: webview_flutter
+      sha256: "889a0a678e7c793c308c68739996227c9661590605e70b1f6cf6b9a6634f7aec"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.10.0"
+  webview_flutter_android:
+    dependency: transitive
+    description:
+      name: webview_flutter_android
+      sha256: "74693a212d990b32e0b7055d27db973a18abf31c53942063948cdfaaef9787ba"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
+  webview_flutter_platform_interface:
+    dependency: transitive
+    description:
+      name: webview_flutter_platform_interface
+      sha256: d937581d6e558908d7ae3dc1989c4f87b786891ab47bb9df7de548a151779d8d
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.0"
+  webview_flutter_wkwebview:
+    dependency: transitive
+    description:
+      name: webview_flutter_wkwebview
+      sha256: d4034901d96357beb1b6717ebf7d583c88e40cfc6eb85fe76dd1bf0979a9f251
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.16.0"
   win32:
     dependency: transitive
     description:
@@ -1750,5 +1782,5 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.5.0-259.0.dev <3.999.0"
+  dart: ">=3.5.0 <3.999.0"
   flutter: ">=3.24.2"

pubspec.yaml

@@ -75,6 +75,7 @@ dependencies:
       url: https://github.com/google/flutter-desktop-embedding.git
       path: plugins/window_size
   xml: ^6.3.0
+  webview_flutter: ^4.10.0
 
 dependency_overrides:
   extended_text_field: ^16.0.0