Add default onLaunchUrl

app/lib/pages/home_page.dart

@@ -79,17 +79,10 @@ class _HomePageState extends State<HomePage> {
               enableInteractiveSelection: true,
               expands: false,
               padding: EdgeInsets.zero,
-              onLaunchUrl: _launchUrl,
             ),
           ),
         ),
       ],
     );
   }
-
-  void _launchUrl(String url) async {
-    if (await canLaunch(url)) {
-      await launch(url);
-    }
-  }
 }

app/pubspec.lock

@@ -190,7 +190,7 @@ packages:
     source: hosted
     version: "1.3.0-nullsafety.3"
   url_launcher:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: url_launcher
       url: "https://pub.dartlang.org"

app/pubspec.yaml

@@ -23,7 +23,6 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  url_launcher: ^5.7.10
 
 
   # The following adds the Cupertino Icons font to your application.

lib/widgets/editor.dart

@@ -15,6 +15,7 @@ import 'package:flutter_quill/models/documents/nodes/line.dart';
 import 'package:flutter_quill/models/documents/nodes/node.dart';
 import 'package:flutter_quill/widgets/raw_editor.dart';
 import 'package:flutter_quill/widgets/text_selection.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 import 'box.dart';
 import 'controller.dart';
@@ -103,7 +104,7 @@ class QuillEditor extends StatefulWidget {
   final TextCapitalization textCapitalization;
   final Brightness keyboardAppearance;
   final ScrollPhysics scrollPhysics;
-  final ValueChanged<String> onLaunchUrl;
+  ValueChanged<String> onLaunchUrl;
   final EmbedBuilder embedBuilder;
 
   QuillEditor(
@@ -316,17 +317,26 @@ class _QuillEditorSelectionGestureDetectorBuilder
       return;
     }
     Leaf segment = segmentResult.node as Leaf;
-    if (segment.style.containsKey(Attribute.link.key) &&
-        getEditor().widget.onLaunchUrl != null) {
+    if (segment.style.containsKey(Attribute.link.key)) {
+      var launchUrl = getEditor().widget.onLaunchUrl;
+      if (launchUrl == null) {
+        launchUrl = _launchUrl;
+      }
       String link = segment.style.attributes[Attribute.link.key].value;
       if (getEditor().widget.readOnly &&
           link != null &&
           urlRegExp.firstMatch(link) != null) {
-        getEditor().widget.onLaunchUrl(link);
+        launchUrl(link);
       }
     }
   }
 
+  void _launchUrl(String url) async {
+    if (await canLaunch(url)) {
+      await launch(url);
+    }
+  }
+
   @override
   onSingleTapUp(TapUpDetails details) {
     getEditor().hideToolbar();

pubspec.lock

@@ -60,6 +60,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   matcher:
     dependency: transitive
     description:
@@ -81,6 +86,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0-nullsafety.1"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   quill_delta:
     dependency: "direct main"
     description:
@@ -163,6 +175,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.0-nullsafety.3"
+  url_launcher:
+    dependency: "direct main"
+    description:
+      name: url_launcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.7.10"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+4"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+9"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.9"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.5+1"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+3"
   vector_math:
     dependency: transitive
     description:
@@ -172,4 +226,4 @@ packages:
     version: "2.1.0-nullsafety.3"
 sdks:
   dart: ">=2.10.0-110 <2.11.0"
-  flutter: ">=1.17.0 <2.0.0"
+  flutter: ">=1.22.0 <2.0.0"

pubspec.yaml

@@ -16,6 +16,7 @@ dependencies:
   quiver_hashcode: ^2.0.0
   collection: ^1.14.13
   tuple: ^1.0.3
+  url_launcher: ^5.7.10
 
 dev_dependencies:
   flutter_test: