feat: override block component validator (#924)

lib/src/editor/block_component/bulleted_list_block_component/bulleted_list_block_component.dart

@@ -60,7 +60,7 @@ class BulletedListBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) => node.delta != null;
+  BlockComponentValidate get validate => (node) => node.delta != null;
 }
 
 class BulletedListBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/divider_block_component/divider_block_component.dart

@@ -52,7 +52,7 @@ class DividerBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) => node.children.isEmpty;
+  BlockComponentValidate get validate => (node) => node.children.isEmpty;
 }
 
 class DividerBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/heading_block_component/heading_block_component.dart

@@ -63,9 +63,6 @@ class HeadingBlockComponentBuilder extends BlockComponentBuilder {
       ),
     );
   }
-
-  @override
-  bool validate(Node node) => true;
 }
 
 class HeadingBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/image_block_component/image_block_component.dart

@@ -83,7 +83,8 @@ class ImageBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) => node.delta == null && node.children.isEmpty;
+  BlockComponentValidate get validate =>
+      (node) => node.delta == null && node.children.isEmpty;
 }
 
 class ImageBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/numbered_list_block_component/numbered_list_block_component.dart

@@ -70,7 +70,7 @@ class NumberedListBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) => node.delta != null;
+  BlockComponentValidate get validate => (node) => node.delta != null;
 }
 
 class NumberedListBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/paragraph_block_component/paragraph_block_component.dart

@@ -60,9 +60,7 @@ class ParagraphBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) {
-    return node.delta != null;
-  }
+  BlockComponentValidate get validate => (node) => node.delta != null;
 }
 
 class ParagraphBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/quote_block_component/quote_block_component.dart

@@ -57,7 +57,7 @@ class QuoteBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) => node.delta != null;
+  BlockComponentValidate get validate => (node) => node.delta != null;
 }
 
 class QuoteBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/table_block_component/table_block_component.dart

@@ -110,7 +110,7 @@ class TableBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) {
+  BlockComponentValidate get validate => (node) {
         // check the node is valid
         if (node.attributes.isEmpty) {
           AppFlowyEditorLog.editor
@@ -171,7 +171,7 @@ class TableBlockComponentBuilder extends BlockComponentBuilder {
         }
 
         return true;
-  }
+      };
 }
 
 class TableBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/block_component/table_block_component/table_cell_block_component.dart

@@ -68,7 +68,7 @@ class TableCellBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) =>
+  BlockComponentValidate get validate => (node) =>
       node.attributes.isNotEmpty &&
       node.attributes.containsKey(TableCellBlockKeys.rowPosition) &&
       node.attributes.containsKey(TableCellBlockKeys.colPosition);

lib/src/editor/block_component/todo_list_block_component/todo_list_block_component.dart

@@ -81,9 +81,7 @@ class TodoListBlockComponentBuilder extends BlockComponentBuilder {
   }
 
   @override
-  bool validate(Node node) {
-    return node.delta != null;
-  }
+  BlockComponentValidate get validate => (node) => node.delta != null;
 }
 
 class TodoListBlockComponentWidget extends BlockComponentStatefulWidget {

lib/src/editor/editor_component/service/renderer/block_component_service.dart

@@ -12,6 +12,8 @@ typedef BlockActionBuilder = Widget Function(
   BlockComponentActionState state,
 );
 
+typedef BlockComponentValidate = bool Function(Node node);
+
 abstract class BlockComponentActionState {
   set alwaysShowActions(bool alwaysShowActions);
 }
@@ -27,11 +29,11 @@ abstract class BlockComponentBuilder with BlockComponentSelectable {
   /// return true if the node is valid.
   /// return false if the node is invalid,
   ///   and the node will be displayed as a PlaceHolder widget.
-  bool validate(Node node) => true;
+  BlockComponentValidate validate = (_) => true;
 
   BlockComponentWidget build(BlockComponentContext blockComponentContext);
 
-  bool Function(Node) showActions = (_) => false;
+  bool Function(Node node) showActions = (_) => false;
 
   BlockActionBuilder actionBuilder = (_, __) => const SizedBox.shrink();
 

test/customer/custom_error_block_test.dart

@@ -89,9 +89,6 @@ class ErrorBlockComponentBuilder extends BlockComponentBuilder {
       ),
     );
   }
-
-  @override
-  bool validate(Node node) => true;
 }
 
 class ErrorBlockComponentWidget extends BlockComponentStatefulWidget {