From e6f845d36d6720646e24e8caefb69dac68b47d1b Mon Sep 17 00:00:00 2001
From: andycall <dongtiangche@outlook.com>
Date: Fri, 11 Aug 2023 22:29:32 +0800
Subject: [PATCH] fix: support sliver recommendDeferredLoading

---
 webf/lib/src/dom/element.dart             | 2 +-
 webf/lib/src/gesture/scroll_position.dart | 5 +++--
 webf/lib/src/launcher/controller.dart     | 4 +++-
 webf/lib/src/widget/webf.dart             | 7 ++++++-
 4 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/webf/lib/src/dom/element.dart b/webf/lib/src/dom/element.dart
index db48199240..8c08a821d3 100644
--- a/webf/lib/src/dom/element.dart
+++ b/webf/lib/src/dom/element.dart
@@ -1910,7 +1910,7 @@ abstract class Element extends ContainerNode with ElementBase, ElementEventMixin
       scrollable = (next?.parentElement!.renderer as RenderSliverListLayout).scrollable;
     }
     if(scrollable != null && scrollable.position != null) {
-      return scrollable.position!.recommendDeferredLoading();
+      return scrollable.position!.recommendDeferredLoading(ownerDocument.controller.buildContext);
     }
     return false;
   }
diff --git a/webf/lib/src/gesture/scroll_position.dart b/webf/lib/src/gesture/scroll_position.dart
index db7b13ae3f..f256180ce8 100644
--- a/webf/lib/src/gesture/scroll_position.dart
+++ b/webf/lib/src/gesture/scroll_position.dart
@@ -14,7 +14,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/physics.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
-import 'package:flutter/widgets.dart' show ScrollPhysics, ScrollMetrics;
+import 'package:flutter/widgets.dart' show BuildContext, ScrollMetrics, ScrollPhysics;
 
 import 'scroll_activity.dart';
 import 'scroll_context.dart';
@@ -228,11 +228,12 @@ abstract class ScrollPosition extends ViewportOffset with ScrollMetrics {
     isScrollingNotifier.value = activity!.isScrolling;
   }
 
-  bool recommendDeferredLoading() {
+  bool recommendDeferredLoading(BuildContext buildContext) {
     assert(activity != null);
     return physics.recommendDeferredLoading(
       activity!.velocity + _impliedVelocity,
       copyWith(),
+      buildContext
     );
   }
 
diff --git a/webf/lib/src/launcher/controller.dart b/webf/lib/src/launcher/controller.dart
index 67d1d85c3e..5a2720ccc0 100644
--- a/webf/lib/src/launcher/controller.dart
+++ b/webf/lib/src/launcher/controller.dart
@@ -17,7 +17,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter/widgets.dart'
-    show RouteInformation, WidgetsBinding, WidgetsBindingObserver, AnimationController;
+    show AnimationController, BuildContext, RouteInformation, WidgetsBinding, WidgetsBindingObserver;
 import 'package:webf/css.dart';
 import 'package:webf/dom.dart';
 import 'package:webf/gesture.dart';
@@ -769,6 +769,7 @@ class WebFController {
   final List<Cookie>? initialCookies;
 
   final ui.FlutterView ownerFlutterView;
+  final BuildContext buildContext;
 
   String? _name;
   String? get name => _name;
@@ -810,6 +811,7 @@ class WebFController {
     this.uriParser,
     this.initialCookies,
     required this.ownerFlutterView,
+    required this.buildContext
   })  : _name = name,
         _entrypoint = entrypoint,
         _gestureListener = gestureListener {
diff --git a/webf/lib/src/widget/webf.dart b/webf/lib/src/widget/webf.dart
index e0ac45d15d..9984b06244 100644
--- a/webf/lib/src/widget/webf.dart
+++ b/webf/lib/src/widget/webf.dart
@@ -221,6 +221,7 @@ class WebFState extends State<WebF> with RouteAware {
           onCustomElementAttached: onCustomElementWidgetAdd,
           onCustomElementDetached: onCustomElementWidgetRemove,
           children: customElementWidgets.toList(),
+          buildContext: context,
         ),
       ),
     );
@@ -296,10 +297,13 @@ class WebFRootRenderObjectWidget extends MultiChildRenderObjectWidget {
     required this.currentView,
     required this.onCustomElementAttached,
     required this.onCustomElementDetached,
+    required BuildContext buildContext
   })  : _webfWidget = widget,
+        _buildContext = buildContext,
         super(key: key, children: children);
 
   final WebF _webfWidget;
+  final BuildContext _buildContext;
 
   @override
   RenderObject createRenderObject(BuildContext context) {
@@ -324,7 +328,8 @@ class WebFRootRenderObjectWidget extends MultiChildRenderObjectWidget {
         onCustomElementDetached: onCustomElementDetached,
         initialCookies: _webfWidget.initialCookies,
         uriParser: _webfWidget.uriParser,
-        ownerFlutterView: currentView);
+        ownerFlutterView: currentView,
+        buildContext: _buildContext);
 
     (context as _WebFRenderObjectElement).controller = controller;