fix: the selection should be clear if header or footer is focusing (#525)

example/lib/pages/focus_example_for_editor.dart

@@ -37,7 +37,7 @@ class _FocusExampleForEditorState extends State<FocusExampleForEditor> {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Colors.black,
-        title: const Text('Custom Theme For Editor'),
+        title: const Text('Focus Node Example'),
         titleTextStyle: const TextStyle(color: Colors.white),
         iconTheme: const IconThemeData(
           color: Colors.white,
@@ -52,7 +52,21 @@ class _FocusExampleForEditorState extends State<FocusExampleForEditor> {
               builder: (context, snapshot) {
                 return !snapshot.hasData
                     ? const Center(child: CircularProgressIndicator())
-                    : AppFlowyEditor(editorState: snapshot.data!);
+                    : AppFlowyEditor(
+                        editorState: snapshot.data!,
+                        header: const TextField(
+                          textAlign: TextAlign.center,
+                          decoration: InputDecoration(
+                            hintText: 'Header: Please input something ...',
+                          ),
+                        ),
+                        footer: const TextField(
+                          textAlign: TextAlign.center,
+                          decoration: InputDecoration(
+                            hintText: 'Footer: Please input something ...',
+                          ),
+                        ),
+                      );
               },
             ),
           ),

lib/src/editor/block_component/base_component/widget/ignore_parent_gesture.dart

@@ -0,0 +1,54 @@
+import 'dart:math';
+
+import 'package:appflowy_editor/appflowy_editor.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+class IgnoreEditorSelectionGesture extends StatefulWidget {
+  const IgnoreEditorSelectionGesture({
+    super.key,
+    required this.child,
+  });
+
+  final Widget child;
+
+  @override
+  State<IgnoreEditorSelectionGesture> createState() =>
+      _IgnoreEditorSelectionGestureState();
+}
+
+class _IgnoreEditorSelectionGestureState
+    extends State<IgnoreEditorSelectionGesture> {
+  final key = Random(10000).toString();
+  late final SelectionGestureInterceptor interceptor;
+  late final EditorState editorState = context.read<EditorState>();
+
+  @override
+  void initState() {
+    super.initState();
+
+    interceptor = SelectionGestureInterceptor(
+      key: key,
+      canTap: (details) {
+        final renderObject = context.findRenderObject();
+        if (renderObject != null && renderObject is RenderBox) {
+          final offset = renderObject.globalToLocal(details.globalPosition);
+          return !renderObject.paintBounds.contains(offset);
+        }
+        return true;
+      },
+    );
+    editorState.selectionService.registerGestureInterceptor(interceptor);
+  }
+
+  @override
+  void dispose() {
+    editorState.selectionService.unregisterGestureInterceptor(key);
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return widget.child;
+  }
+}

lib/src/editor/editor_component/entry/page_block_component.dart

@@ -1,4 +1,5 @@
 import 'package:appflowy_editor/appflowy_editor.dart';
+import 'package:appflowy_editor/src/editor/block_component/base_component/widget/ignore_parent_gesture.dart';
 import 'package:appflowy_editor/src/flutter/scrollable_positioned_list/scrollable_positioned_list.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
@@ -82,8 +83,16 @@ class PageBlockComponent extends BlockComponentStatelessWidget {
         itemCount: items.length + extentCount,
         itemBuilder: (context, index) {
           editorState.updateAutoScroller(Scrollable.of(context));
-          if (header != null && index == 0) return header!;
+          if (header != null && index == 0) {
-          if (footer != null && index == items.length + 1) return footer!;
+            return IgnoreEditorSelectionGesture(
+              child: header!,
+            );
+          }
+          if (footer != null && index == items.length + 1) {
+            return IgnoreEditorSelectionGesture(
+              child: footer!,
+            );
+          }
           return Padding(
             padding: editorState.editorStyle.padding,
             child: editorState.renderer.build(

lib/src/editor/editor_component/service/selection/desktop_selection_service.dart

@@ -196,7 +196,9 @@ class _DesktopSelectionServiceWidgetState
     final canTap = _interceptors.every(
       (element) => element.canTap?.call(details) ?? true,
     );
-    if (!canTap) return;
+    if (!canTap) {
+      return updateSelection(null);
+    }
 
     final offset = details.globalPosition;
     final node = getNodeInOffset(offset);