feat: add scrollable_positioned_list dependency by source code

example/pubspec.yaml

@@ -48,13 +48,6 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-dependency_overrides:
-  scrollable_positioned_list:
-    git:
-      url: https://github.com/LucasXu0/flutter.widgets.git
-      ref: 93d78cbcd689a89a8fa6deb87eeb70dc90cc7700
-      path: packages/scrollable_positioned_list
-
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is
   # activated in the `analysis_options.yaml` file located at the root of your

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

@@ -1,7 +1,7 @@
 import 'package:appflowy_editor/appflowy_editor.dart';
+import 'package:appflowy_editor/src/flutter/scrollable_positioned_list/scrollable_positioned_list.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';
 
 class PageBlockKeys {
   static const String type = 'page';

lib/src/editor/editor_component/service/scroll/editor_scroll_controller.dart

@@ -2,8 +2,8 @@ import 'dart:async';
 import 'dart:math';
 
 import 'package:appflowy_editor/appflowy_editor.dart';
+import 'package:appflowy_editor/src/flutter/scrollable_positioned_list/scrollable_positioned_list.dart';
 import 'package:flutter/material.dart';
-import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';
 
 /// This class controls the scroll behavior of the editor.
 ///

lib/src/flutter/scrollable_positioned_list/scrollable_positioned_list.dart

@@ -0,0 +1,7 @@
+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+export 'src/item_positions_listener.dart';
+export 'src/scrollable_positioned_list.dart';
+export 'src/scroll_offset_listener.dart';

lib/src/flutter/scrollable_positioned_list/src/element_registry.dart

@@ -0,0 +1,98 @@
+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/widgets.dart';
+
+/// A registry to track some [Element]s in the tree.
+class RegistryWidget extends StatefulWidget {
+  /// Creates a [RegistryWidget].
+  const RegistryWidget({Key? key, this.elementNotifier, required this.child})
+      : super(key: key);
+
+  /// The widget below this widget in the tree.
+  final Widget child;
+
+  /// Contains the current set of all [Element]s created by
+  /// [RegisteredElementWidget]s in the tree below this widget.
+  ///
+  /// Note that if there is another [RegistryWidget] in this widget's subtree
+  /// that registry, and not this one, will collect elements in its subtree.
+  final ValueNotifier<Set<Element>?>? elementNotifier;
+
+  @override
+  State<StatefulWidget> createState() => _RegistryWidgetState();
+}
+
+/// A widget whose [Element] will be added its nearest ancestor
+/// [RegistryWidget].
+class RegisteredElementWidget extends ProxyWidget {
+  /// Creates a [RegisteredElementWidget].
+  const RegisteredElementWidget({Key? key, required Widget child})
+      : super(key: key, child: child);
+
+  @override
+  Element createElement() => _RegisteredElement(this);
+}
+
+class _RegistryWidgetState extends State<RegistryWidget> {
+  final Set<Element> registeredElements = {};
+
+  @override
+  Widget build(BuildContext context) => _InheritedRegistryWidget(
+        state: this,
+        child: widget.child,
+      );
+}
+
+class _InheritedRegistryWidget extends InheritedWidget {
+  final _RegistryWidgetState state;
+
+  const _InheritedRegistryWidget({
+    Key? key,
+    required this.state,
+    required Widget child,
+  }) : super(key: key, child: child);
+
+  @override
+  bool updateShouldNotify(InheritedWidget oldWidget) => true;
+}
+
+class _RegisteredElement extends ProxyElement {
+  _RegisteredElement(ProxyWidget widget) : super(widget);
+
+  @override
+  void notifyClients(ProxyWidget oldWidget) {}
+
+  late _RegistryWidgetState _registryWidgetState;
+
+  @override
+  void mount(Element? parent, dynamic newSlot) {
+    super.mount(parent, newSlot);
+    final inheritedRegistryWidget =
+        dependOnInheritedWidgetOfExactType<_InheritedRegistryWidget>()!;
+    _registryWidgetState = inheritedRegistryWidget.state;
+    _registryWidgetState.registeredElements.add(this);
+    _registryWidgetState.widget.elementNotifier?.value =
+        _registryWidgetState.registeredElements;
+  }
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final inheritedRegistryWidget =
+        dependOnInheritedWidgetOfExactType<_InheritedRegistryWidget>()!;
+    _registryWidgetState = inheritedRegistryWidget.state;
+    _registryWidgetState.registeredElements.add(this);
+    _registryWidgetState.widget.elementNotifier?.value =
+        _registryWidgetState.registeredElements;
+  }
+
+  @override
+  void unmount() {
+    _registryWidgetState.registeredElements.remove(this);
+    _registryWidgetState.widget.elementNotifier?.value =
+        _registryWidgetState.registeredElements;
+    super.unmount();
+  }
+}

lib/src/flutter/scrollable_positioned_list/src/item_positions_listener.dart

@@ -0,0 +1,62 @@
+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/foundation.dart';
+
+import 'item_positions_notifier.dart';
+import 'scrollable_positioned_list.dart';
+
+/// Provides a listenable iterable of [itemPositions] of items that are on
+/// screen and their locations.
+abstract class ItemPositionsListener {
+  /// Creates an [ItemPositionsListener] that can be used by a
+  /// [ScrollablePositionedList] to return the current position of items.
+  factory ItemPositionsListener.create() => ItemPositionsNotifier();
+
+  /// The position of items that are at least partially visible in the viewport.
+  ValueListenable<Iterable<ItemPosition>> get itemPositions;
+}
+
+/// Position information for an item in the list.
+class ItemPosition {
+  /// Create an [ItemPosition].
+  const ItemPosition({
+    required this.index,
+    required this.itemLeadingEdge,
+    required this.itemTrailingEdge,
+  });
+
+  /// Index of the item.
+  final int index;
+
+  /// Distance in proportion of the viewport's main axis length from the leading
+  /// edge of the viewport to the leading edge of the item.
+  ///
+  /// May be negative if the item is partially visible.
+  final double itemLeadingEdge;
+
+  /// Distance in proportion of the viewport's main axis length from the leading
+  /// edge of the viewport to the trailing edge of the item.
+  ///
+  /// May be greater than one if the item is partially visible.
+  final double itemTrailingEdge;
+
+  @override
+  bool operator ==(dynamic other) {
+    if (other.runtimeType != runtimeType) return false;
+    final ItemPosition otherPosition = other;
+    return otherPosition.index == index &&
+        otherPosition.itemLeadingEdge == itemLeadingEdge &&
+        otherPosition.itemTrailingEdge == itemTrailingEdge;
+  }
+
+  @override
+  int get hashCode =>
+      31 * (31 * (7 + index.hashCode) + itemLeadingEdge.hashCode) +
+      itemTrailingEdge.hashCode;
+
+  @override
+  String toString() =>
+      'ItemPosition(index: $index, itemLeadingEdge: $itemLeadingEdge, itemTrailingEdge: $itemTrailingEdge)';
+}

lib/src/flutter/scrollable_positioned_list/src/item_positions_notifier.dart

@@ -0,0 +1,13 @@
+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/foundation.dart';
+
+import 'item_positions_listener.dart';
+
+/// Internal implementation of [ItemPositionsListener].
+class ItemPositionsNotifier implements ItemPositionsListener {
+  @override
+  final ValueNotifier<Iterable<ItemPosition>> itemPositions = ValueNotifier([]);
+}