customLinkPrefixes parameter - makes possible to open links with custom protocol (deeplinks) (#1164)

lib/src/widgets/editor.dart

@@ -182,6 +182,7 @@ class QuillEditor extends StatefulWidget {
       this.customShortcuts,
       this.customActions,
       this.detectWordBoundary = true,
+      this.customLinkPrefixes = const <String>[],
       Key? key})
       : super(key: key);
 
@@ -401,6 +402,12 @@ class QuillEditor extends StatefulWidget {
 
   final bool detectWordBoundary;
 
+  /// Additional list if links prefixes, which must not be prepended
+  /// with "https://" when [LinkMenuAction.launch] happened
+  ///
+  /// Useful for deeplinks
+  final List<String> customLinkPrefixes;
+
   @override
   QuillEditorState createState() => QuillEditorState();
 }
@@ -498,6 +505,7 @@ class QuillEditorState extends State<QuillEditor>
       onImagePaste: widget.onImagePaste,
       customShortcuts: widget.customShortcuts,
       customActions: widget.customActions,
+      customLinkPrefixes: widget.customLinkPrefixes,
     );
 
     final editor = I18n(

lib/src/widgets/raw_editor.dart

@@ -78,7 +78,8 @@ class RawEditor extends StatefulWidget {
       this.linkActionPickerDelegate = defaultLinkActionPickerDelegate,
       this.customStyleBuilder,
       this.floatingCursorDisabled = false,
-      this.onImagePaste})
+      this.onImagePaste,
+      this.customLinkPrefixes = const <String>[]})
       : assert(maxHeight == null || maxHeight > 0, 'maxHeight cannot be null'),
         assert(minHeight == null || minHeight >= 0, 'minHeight cannot be null'),
         assert(maxHeight == null || minHeight == null || maxHeight >= minHeight,
@@ -250,6 +251,7 @@ class RawEditor extends StatefulWidget {
   final LinkActionPickerDelegate linkActionPickerDelegate;
   final CustomStyleBuilder? customStyleBuilder;
   final bool floatingCursorDisabled;
+  final List<String> customLinkPrefixes;
 
   @override
   State<StatefulWidget> createState() => RawEditorState();
@@ -800,7 +802,8 @@ class RawEditorState extends EditorState
             clearIndents: clearIndents,
             onCheckboxTap: _handleCheckboxTap,
             readOnly: widget.readOnly,
-            customStyleBuilder: widget.customStyleBuilder);
+            customStyleBuilder: widget.customStyleBuilder,
+            customLinkPrefixes: widget.customLinkPrefixes);
         result.add(Directionality(
             textDirection: getDirectionOfNode(node), child: editableTextBlock));
 
@@ -824,6 +827,7 @@ class RawEditorState extends EditorState
       controller: controller,
       linkActionPicker: _linkActionPicker,
       onLaunchUrl: widget.onLaunchUrl,
+      customLinkPrefixes: widget.customLinkPrefixes,
     );
     final editableTextLine = EditableTextLine(
         node,

lib/src/widgets/text_block.dart

@@ -73,6 +73,7 @@ class EditableTextBlock extends StatelessWidget {
       required this.readOnly,
       this.onLaunchUrl,
       this.customStyleBuilder,
+      this.customLinkPrefixes = const <String>[],
       Key? key});
 
   final Block block;
@@ -95,6 +96,7 @@ class EditableTextBlock extends StatelessWidget {
   final bool clearIndents;
   final Function(int, bool) onCheckboxTap;
   final bool readOnly;
+  final List<String> customLinkPrefixes;
 
   @override
   Widget build(BuildContext context) {
@@ -148,6 +150,7 @@ class EditableTextBlock extends StatelessWidget {
             controller: controller,
             linkActionPicker: linkActionPicker,
             onLaunchUrl: onLaunchUrl,
+            customLinkPrefixes: customLinkPrefixes,
           ),
           _getIndentWidth(),
           _getSpacingForLine(line, index, count, defaultStyles),

lib/src/widgets/text_line.dart

@@ -41,6 +41,7 @@ class TextLine extends StatefulWidget {
     required this.linkActionPicker,
     this.textDirection,
     this.customStyleBuilder,
+    this.customLinkPrefixes = const <String>[],
     Key? key,
   }) : super(key: key);
 
@@ -53,6 +54,7 @@ class TextLine extends StatefulWidget {
   final CustomStyleBuilder? customStyleBuilder;
   final ValueChanged<String>? onLaunchUrl;
   final LinkActionPicker linkActionPicker;
+  final List<String> customLinkPrefixes;
 
   @override
   State<TextLine> createState() => _TextLineState();
@@ -430,7 +432,7 @@ class _TextLineState extends State<TextLine> {
     launchUrl ??= _launchUrl;
 
     link = link.trim();
-    if (!linkPrefixes
+    if (!(widget.customLinkPrefixes + linkPrefixes)
         .any((linkPrefix) => link!.toLowerCase().startsWith(linkPrefix))) {
       link = 'https://$link';
     }