Added multiplatform support (pub.dev badges)

Author: SergeShkurko

lib/flutter_html.dart

@@ -7,7 +7,7 @@ import 'package:flutter_html/image_render.dart';
 import 'package:flutter_html/src/html_elements.dart';
 import 'package:flutter_html/style.dart';
 import 'package:html/dom.dart' as dom;
-import 'package:webview_flutter/webview_flutter.dart';
+import 'package:flutter_html/src/navigation_delegate.dart';
 
 //export render context api
 export 'package:flutter_html/html_parser.dart';
@@ -18,6 +18,7 @@ export 'package:flutter_html/src/interactable_element.dart';
 export 'package:flutter_html/src/layout_element.dart';
 export 'package:flutter_html/src/replaced_element.dart';
 export 'package:flutter_html/src/styled_element.dart';
+export 'package:flutter_html/src/navigation_delegate.dart';
 //export style api
 export 'package:flutter_html/style.dart';
 

lib/html_parser.dart

@@ -13,12 +13,12 @@ import 'package:flutter_html/src/anchor.dart';
 import 'package:flutter_html/src/css_parser.dart';
 import 'package:flutter_html/src/html_elements.dart';
 import 'package:flutter_html/src/layout_element.dart';
+import 'package:flutter_html/src/navigation_delegate.dart';
 import 'package:flutter_html/src/utils.dart';
 import 'package:flutter_html/style.dart';
 import 'package:html/dom.dart' as dom;
 import 'package:html/parser.dart' as htmlparser;
 import 'package:numerus/numerus.dart';
-import 'package:webview_flutter/webview_flutter.dart';
 
 typedef OnTap = void Function(
     String? url,

lib/src/navigation_delegate.dart

@@ -0,0 +1,35 @@
+import 'dart:async';
+
+/// Information about a navigation action that is about to be executed.
+class NavigationRequest {
+  NavigationRequest({required this.url, required this.isForMainFrame});
+
+  /// The URL that will be loaded if the navigation is executed.
+  final String url;
+
+  /// Whether the navigation request is to be loaded as the main frame.
+  final bool isForMainFrame;
+
+  @override
+  String toString() {
+    return '$runtimeType(url: $url, isForMainFrame: $isForMainFrame)';
+  }
+}
+
+/// A decision on how to handle a navigation request.
+enum NavigationDecision {
+  /// Prevent the navigation from taking place.
+  prevent,
+
+  /// Allow the navigation to take place.
+  navigate,
+}
+
+/// Decides how to handle a specific navigation request.
+///
+/// The returned [NavigationDecision] determines how the navigation described by
+/// `navigation` should be handled.
+///
+/// See also: [WebView.navigationDelegate].
+typedef FutureOr<NavigationDecision> NavigationDelegate(
+    NavigationRequest navigation);

lib/src/replaced_element.dart

@@ -7,6 +7,7 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter_html/html_parser.dart';
 import 'package:flutter_html/src/anchor.dart';
 import 'package:flutter_html/src/html_elements.dart';
+import 'package:flutter_html/src/navigation_delegate.dart';
 import 'package:flutter_html/src/utils.dart';
 import 'package:flutter_html/src/widgets/iframe_unsupported.dart'
   if (dart.library.io) 'package:flutter_html/src/widgets/iframe_mobile.dart'
@@ -16,7 +17,6 @@ import 'package:flutter_math_fork/flutter_math.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import 'package:html/dom.dart' as dom;
 import 'package:video_player/video_player.dart';
-import 'package:webview_flutter/webview_flutter.dart';
 
 /// A [ReplacedElement] is a type of [StyledElement] that does not require its [children] to be rendered.
 ///

lib/src/widgets/iframe_mobile.dart

@@ -2,9 +2,10 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_html/html_parser.dart';
+import 'package:flutter_html/src/navigation_delegate.dart';
 import 'package:flutter_html/src/replaced_element.dart';
 import 'package:flutter_html/style.dart';
-import 'package:webview_flutter/webview_flutter.dart';
+import 'package:webview_flutter/webview_flutter.dart' as webview;
 import 'package:html/dom.dart' as dom;
 
 /// [IframeContentElement is a [ReplacedElement] with web content.
@@ -30,13 +31,23 @@ class IframeContentElement extends ReplacedElement {
     return Container(
       width: width ?? (height ?? 150) * 2,
       height: height ?? (width ?? 300) / 2,
-      child: WebView(
+      child: webview.WebView(
         initialUrl: src,
         key: key,
         javascriptMode: sandboxMode == null || sandboxMode == "allow-scripts"
-            ? JavascriptMode.unrestricted
-            : JavascriptMode.disabled,
-        navigationDelegate: navigationDelegate,
+            ? webview.JavascriptMode.unrestricted
+            : webview.JavascriptMode.disabled,
+        navigationDelegate: (request) async {
+          final result = await navigationDelegate!(NavigationRequest(
+            url: request.url,
+            isForMainFrame: request.isForMainFrame,
+          ));
+          if (result == NavigationDecision.prevent) {
+            return webview.NavigationDecision.prevent;
+          } else {
+            return webview.NavigationDecision.navigate;
+          }
+        },
         gestureRecognizers: {
           Factory<VerticalDragGestureRecognizer>(() => VerticalDragGestureRecognizer())
         },

lib/src/widgets/iframe_unsupported.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_html/html_parser.dart';
+import 'package:flutter_html/src/navigation_delegate.dart';
 import 'package:flutter_html/src/replaced_element.dart';
 import 'package:flutter_html/style.dart';
-import 'package:webview_flutter/webview_flutter.dart';
 import 'package:html/dom.dart' as dom;
 
 /// [IframeContentElement is a [ReplacedElement] with web content.
@@ -30,4 +30,4 @@ class IframeContentElement extends ReplacedElement {
       child: Text("Iframes are currently not supported in this environment"),
     );
   }
-}
+}

lib/src/widgets/iframe_web.dart

@@ -1,10 +1,10 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_html/html_parser.dart';
 import 'package:flutter_html/shims/dart_ui.dart' as ui;
+import 'package:flutter_html/src/navigation_delegate.dart';
 import 'package:flutter_html/src/replaced_element.dart';
 import 'package:flutter_html/src/utils.dart';
 import 'package:flutter_html/style.dart';
-import 'package:webview_flutter/webview_flutter.dart';
 import 'package:html/dom.dart' as dom;
 // ignore: avoid_web_libraries_in_flutter
 import 'dart:html' as html;