From 21002216d6b7991096bd4ba6d3b0b335aa6acabd Mon Sep 17 00:00:00 2001
From: mike <agidel2012@gmail.com>
Date: Sat, 20 Jan 2024 15:25:32 +0300
Subject: [PATCH] fix: [Bug] iOS scroll to cursor issue #644

---
 .../block_component_configuration.dart        | 10 ++++
 .../entry/page_block_component.dart           | 48 +++++++++++--------
 .../service/scroll_service_widget.dart        |  4 +-
 3 files changed, 41 insertions(+), 21 deletions(-)

diff --git a/lib/src/editor/block_component/base_component/block_component_configuration.dart b/lib/src/editor/block_component/base_component/block_component_configuration.dart
index 890b2808a..e08e98d95 100644
--- a/lib/src/editor/block_component/base_component/block_component_configuration.dart
+++ b/lib/src/editor/block_component/base_component/block_component_configuration.dart
@@ -9,6 +9,7 @@ class BlockComponentConfiguration {
     this.placeholderText = _placeholderText,
     this.textStyle = _textStyle,
     this.placeholderTextStyle = _placeholderTextStyle,
+    this.alreadyScrollable = false,
   });
 
   /// The padding of a block component.
@@ -35,23 +36,32 @@ class BlockComponentConfiguration {
   /// It inherits the style from [textStyle].
   final TextStyle Function(Node node) placeholderTextStyle;
 
+  /// This flag shows if AppFlowyEditor is already wrapped with
+  /// SingleChildScrollView
+  ///
+  /// used when scrollController.shrinkWrap == true
+  final bool alreadyScrollable;
+
   BlockComponentConfiguration copyWith({
     EdgeInsets Function(Node node)? padding,
     TextStyle Function(Node node)? textStyle,
     String Function(Node node)? placeholderText,
     TextStyle Function(Node node)? placeholderTextStyle,
+    bool? alreadyScrollable,
   }) {
     return BlockComponentConfiguration(
       padding: padding ?? this.padding,
       textStyle: textStyle ?? this.textStyle,
       placeholderText: placeholderText ?? this.placeholderText,
       placeholderTextStyle: placeholderTextStyle ?? this.placeholderTextStyle,
+      alreadyScrollable: alreadyScrollable ?? this.alreadyScrollable,
     );
   }
 }
 
 mixin BlockComponentConfigurable<T extends StatefulWidget> on State<T> {
   BlockComponentConfiguration get configuration;
+
   Node get node;
 
   EdgeInsets get padding => configuration.padding(node);
diff --git a/lib/src/editor/editor_component/entry/page_block_component.dart b/lib/src/editor/editor_component/entry/page_block_component.dart
index 36d599a7a..d3d24574a 100644
--- a/lib/src/editor/editor_component/entry/page_block_component.dart
+++ b/lib/src/editor/editor_component/entry/page_block_component.dart
@@ -27,8 +27,13 @@ class PageBlockComponentBuilder extends BlockComponentBuilder {
       node: blockComponentContext.node,
       header: blockComponentContext.header,
       footer: blockComponentContext.footer,
+      configuration: configuration,
     );
   }
+
+  PageBlockComponentBuilder({
+    super.configuration = const BlockComponentConfiguration(),
+  });
 }
 
 class PageBlockComponent extends BlockComponentStatelessWidget {
@@ -54,28 +59,31 @@ class PageBlockComponent extends BlockComponentStatelessWidget {
     if (scrollController == null ||
         scrollController.shrinkWrap ||
         !editorState.editable) {
-      return SingleChildScrollView(
-        child: Builder(
-          builder: (context) {
-            final scroller = Scrollable.maybeOf(context);
-            if (scroller != null) {
-              editorState.updateAutoScroller(scroller);
-            }
-            return Column(
-              children: [
-                if (header != null) header!,
-                ...items.map(
-                  (e) => Padding(
-                    padding: editorState.editorStyle.padding,
-                    child: editorState.renderer.build(context, e),
-                  ),
+      final child = Builder(
+        builder: (context) {
+          final scroller = Scrollable.maybeOf(context);
+          if (scroller != null) {
+            editorState.updateAutoScroller(scroller);
+          }
+          return Column(
+            children: [
+              if (header != null) header!,
+              ...items.map(
+                (e) => Padding(
+                  padding: editorState.editorStyle.padding,
+                  child: editorState.renderer.build(context, e),
                 ),
-                if (footer != null) footer!,
-              ],
-            );
-          },
-        ),
+              ),
+              if (footer != null) footer!,
+            ],
+          );
+        },
       );
+      return configuration.alreadyScrollable
+          ? child
+          : SingleChildScrollView(
+              child: child,
+            );
     } else {
       int extentCount = 0;
       if (header != null) extentCount++;
diff --git a/lib/src/editor/editor_component/service/scroll_service_widget.dart b/lib/src/editor/editor_component/service/scroll_service_widget.dart
index c7b90a15c..e5b70f2a1 100644
--- a/lib/src/editor/editor_component/service/scroll_service_widget.dart
+++ b/lib/src/editor/editor_component/service/scroll_service_widget.dart
@@ -11,6 +11,8 @@ class ScrollServiceWidget extends StatefulWidget {
     required this.editorScrollController,
     required this.child,
   });
+  
+  static double edgeOffset = 150;
 
   final EditorScrollController editorScrollController;
 
@@ -108,7 +110,7 @@ class _ScrollServiceWidgetState extends State<ScrollServiceWidget>
             ), () {
           startAutoScroll(
             endTouchPoint,
-            edgeOffset: 150,
+            edgeOffset: ScrollServiceWidget.edgeOffset,
             duration: Duration.zero,
           );
         });