feat: add preloadItemCount for List, incase we need preload more items before scroll to end

doric-android/doric/src/main/java/pub/doric/shader/list/ListAdapter.java

@@ -68,7 +68,7 @@ class ListAdapter extends RecyclerView.Adapter<ListAdapter.DoricViewHolder> {
                 holder.listItemNode.blend(jsObject.getProperty("props").asObject());
             }
             if (this.loadMore
-                    && position >= this.itemCount
+                    && position >= this.itemCount - this.listNode.preloadItemCount
                     && !TextUtils.isEmpty(this.listNode.onLoadMoreFuncId)) {
                 callLoadMore();
             }

doric-android/doric/src/main/java/pub/doric/shader/list/ListNode.java

@@ -76,6 +76,8 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
     private String onScrollEndFuncId;
     private final DoricJSDispatcher jsDispatcher = new DoricJSDispatcher();
 
+    int preloadItemCount = 0;
+
     public ListNode(DoricContext doricContext) {
         super(doricContext);
         this.listAdapter = new ListAdapter(this);
@@ -377,6 +379,12 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
                 }
                 this.onDraggedFuncId = prop.asString().value();
                 break;
+            case "preloadItemCount":
+                if (!prop.isNumber()) {
+                    return;
+                }
+                this.preloadItemCount = prop.asNumber().toInt();
+                break;
             default:
                 super.blend(view, name, prop);
                 break;

doric-demo/src/ListDemo.ts

@@ -20,8 +20,8 @@ async function loadData(offset: number): Promise<{
     }>(resolve => {
         setTimeout(() => {
             resolve({
-                isEnd: offset > 100,
+                isEnd: offset > 1000,
-                data: new Array(5).fill(offset).map((e, idx) => {
+                data: new Array(15).fill(offset).map((e, idx) => {
                     return { text: `Item: ${e + idx}` }
                 })
             })
@@ -65,6 +65,7 @@ class ListVH extends ViewHolder {
 class ListVM extends ViewModel<ListModel, ListVH> {
     onAttached(state: ListModel, vh: ListVH) {
         vh.list.apply({
+            preloadItemCount: 5,
             canDrag: true,
             onDragging: (from, to) => {
                 log(`onDragging, from: ${from}, to: ${to}`)
@@ -127,7 +128,14 @@ class ListVM extends ViewModel<ListModel, ListVH> {
                 loge('completelyVisible Items is:', ret)
                 const ret2 = await vh.list.findVisibleItems(context)
                 loge('visible Items is:', ret2)
-            }
+            },
+            loadMoreView: listItem(text({
+                text: "LoadMore",
+            }), {
+                layoutConfig: layoutConfig().mostWidth().justHeight(),
+                height: 30,
+                backgroundColor: Color.YELLOW,
+            })
         })
         loadData(state.offset).then(ret => {
             this.updateState(state => {

doric-iOS/Pod/Classes/Shader/DoricListNode.m

@@ -75,6 +75,7 @@ @interface DoricListNode () <UITableViewDataSource, UITableViewDelegate>
 
 @property(nonatomic, assign) NSUInteger rowCount;
 @property(nonatomic, assign) BOOL needReload;
+@property(nonatomic, assign) NSUInteger preloadItemCount;
 @end
 
 @implementation DoricListNode
@@ -85,6 +86,7 @@ - (instancetype)initWithContext:(DoricContext *)doricContext {
         _itemActions = [NSMutableDictionary new];
         _batchCount = 15;
         _loadAnchor = -1;
+        _preloadItemCount = 0;
     }
     return self;
 }
@@ -206,6 +208,8 @@ - (void)blendView:(UITableView *)view forPropName:(NSString *)name propValue:(id
         self.onDraggingFuncId = prop;
     } else if ([@"onDragged" isEqualToString:name]) {
         self.onDraggedFuncId = prop;
+    } else if ([@"preloadItemCount" isEqualToString:name]) {
+        self.preloadItemCount = [prop unsignedIntegerValue];
     } else {
         [super blendView:view forPropName:name propValue:prop];
     }
@@ -249,7 +253,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         NSString *reuseId = props[@"identifier"];
         self.itemActions[@(position)] = props[@"actions"];
         if (self.loadMore
-                && position >= self.rowCount - 1
+                && position >= self.rowCount - 1 - self.preloadItemCount
                 && self.onLoadMoreFuncId) {
             reuseId = @"doricLoadMoreCell";
             [self callLoadMore];

doric-js/bundle/doric-lib.es5.js

@@ -2645,6 +2645,10 @@ var List = /** @class */ (function (_super) {
         Property,
         __metadata$b("design:type", Function)
     ], List.prototype, "onDragged", void 0);
+    __decorate$b([
+        Property,
+        __metadata$b("design:type", Number)
+    ], List.prototype, "preloadItemCount", void 0);
     return List;
 }(Superview));
 function list(config) {
@@ -4402,7 +4406,7 @@ var __generator$1 = (undefined && undefined.__generator) || function (thisArg, b
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) { throw new TypeError("Generator is already executing."); }
-        while (_) { try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) { try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) { return t; }
             if (y = 0, t) { op = [op[0] & 2, t.value]; }
             switch (op[0]) {
@@ -4631,7 +4635,7 @@ var __generator = (undefined && undefined.__generator) || function (thisArg, bod
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) { throw new TypeError("Generator is already executing."); }
-        while (_) { try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) { try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) { return t; }
             if (y = 0, t) { op = [op[0] & 2, t.value]; }
             switch (op[0]) {

doric-js/bundle/doric-lib.js

@@ -161,6 +161,24 @@ function createRef() {
     return new Ref;
 }
 class View {
+    callback2Id(f) {
+        const id = uniqueId('Function');
+        this.callbacks.set(id, f);
+        return id;
+    }
+    id2Callback(id) {
+        let f = this.callbacks.get(id);
+        if (f === undefined) {
+            f = Reflect.get(this, id);
+        }
+        return f;
+    }
+    findViewByTag(tag) {
+        if (tag === this.tag) {
+            return this;
+        }
+        return undefined;
+    }
     constructor() {
         this.width = 0;
         this.height = 0;
@@ -192,24 +210,6 @@ class View {
             }
         });
     }
-    callback2Id(f) {
-        const id = uniqueId('Function');
-        this.callbacks.set(id, f);
-        return id;
-    }
-    id2Callback(id) {
-        let f = this.callbacks.get(id);
-        if (f === undefined) {
-            f = Reflect.get(this, id);
-        }
-        return f;
-    }
-    findViewByTag(tag) {
-        if (tag === this.tag) {
-            return this;
-        }
-        return undefined;
-    }
     /** Anchor start*/
     get left() {
         return this.x;
@@ -2010,6 +2010,10 @@ __decorate$b([
     Property,
     __metadata$b("design:type", Function)
 ], List.prototype, "onDragged", void 0);
+__decorate$b([
+    Property,
+    __metadata$b("design:type", Number)
+], List.prototype, "preloadItemCount", void 0);
 function list(config) {
     const ret = new List;
     ret.apply(config);

doric-js/bundle/doric-sandbox.js

@@ -1273,6 +1273,16 @@ var doric = (function (exports) {
         }
     }
     class Context {
+        hookBeforeNativeCall() {
+            if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
+                Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
+            }
+        }
+        hookAfterNativeCall() {
+            if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
+                Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
+            }
+        }
         constructor(id) {
             this.callbacks = new Map;
             this.classes = new Map;
@@ -1307,16 +1317,6 @@ var doric = (function (exports) {
                 }
             });
         }
-        hookBeforeNativeCall() {
-            if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
-                Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
-            }
-        }
-        hookAfterNativeCall() {
-            if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
-                Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
-            }
-        }
         callNative(namespace, method, args) {
             const callbackId = uniqueId('callback');
             return new Promise((resolve, reject) => {

doric-js/bundle/doric-vm.js

@@ -1284,6 +1284,16 @@ function jsCallReject(contextId, callbackId, args) {
     }
 }
 class Context {
+    hookBeforeNativeCall() {
+        if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
+            Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
+        }
+    }
+    hookAfterNativeCall() {
+        if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
+            Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
+        }
+    }
     constructor(id) {
         this.callbacks = new Map;
         this.classes = new Map;
@@ -1318,16 +1328,6 @@ class Context {
             }
         });
     }
-    hookBeforeNativeCall() {
-        if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
-            Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
-        }
-    }
-    hookAfterNativeCall() {
-        if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
-            Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
-        }
-    }
     callNative(namespace, method, args) {
         const callbackId = uniqueId('callback');
         return new Promise((resolve, reject) => {
@@ -1701,6 +1701,24 @@ function createRef() {
     return new Ref;
 }
 class View {
+    callback2Id(f) {
+        const id = uniqueId('Function');
+        this.callbacks.set(id, f);
+        return id;
+    }
+    id2Callback(id) {
+        let f = this.callbacks.get(id);
+        if (f === undefined) {
+            f = Reflect.get(this, id);
+        }
+        return f;
+    }
+    findViewByTag(tag) {
+        if (tag === this.tag) {
+            return this;
+        }
+        return undefined;
+    }
     constructor() {
         this.width = 0;
         this.height = 0;
@@ -1732,24 +1750,6 @@ class View {
             }
         });
     }
-    callback2Id(f) {
-        const id = uniqueId('Function');
-        this.callbacks.set(id, f);
-        return id;
-    }
-    id2Callback(id) {
-        let f = this.callbacks.get(id);
-        if (f === undefined) {
-            f = Reflect.get(this, id);
-        }
-        return f;
-    }
-    findViewByTag(tag) {
-        if (tag === this.tag) {
-            return this;
-        }
-        return undefined;
-    }
     /** Anchor start*/
     get left() {
         return this.x;
@@ -3550,6 +3550,10 @@ __decorate$b([
     Property,
     __metadata$b("design:type", Function)
 ], List.prototype, "onDragged", void 0);
+__decorate$b([
+    Property,
+    __metadata$b("design:type", Number)
+], List.prototype, "preloadItemCount", void 0);
 function list(config) {
     const ret = new List;
     ret.apply(config);

doric-js/index.d.ts

@@ -1,5 +1,5 @@
 declare module "doric" {
-	// Generated by dts-bundle-generator v6.12.0
+	// Generated by dts-bundle-generator v6.13.0
 	
 	export interface Modeling {
 		toModel(): Model;
@@ -1043,6 +1043,7 @@ declare module "doric" {
 		beforeDragging?: (from: number) => (Array<number> | void);
 		onDragging?: (from: number, to: number) => void;
 		onDragged?: (from: number, to: number) => void;
+		preloadItemCount?: number;
 		scrollToItem(context: BridgeContext, index: number, config?: {
 			animated?: boolean;
 		}): Promise<any>;

doric-js/lib/index.web.d.ts

@@ -4,8 +4,8 @@ declare module NativeClient {
     function callNative(name: string, args: string): string;
     function fetchArrayBuffer(id: string): string;
 }
-declare type RawValue = number | string | boolean | object | undefined | ArrayBuffer;
+type RawValue = number | string | boolean | object | undefined | ArrayBuffer;
-declare type WrappedValue = {
+type WrappedValue = {
     type: "number" | "string" | "boolean" | "object" | "array" | "null" | "arrayBuffer";
     value: RawValue;
 };

doric-js/lib/src/pattern/mvvm.d.ts

@@ -5,7 +5,7 @@ import { ClassType } from "../util/types";
 export declare abstract class ViewHolder {
     abstract build(root: Group): void;
 }
-export declare type Setter<M> = (state: M) => void;
+export type Setter<M> = (state: M) => void;
 export declare abstract class ViewModel<M extends Object, V extends ViewHolder> {
     context: BridgeContext;
     private state;

doric-js/lib/src/pattern/provider.d.ts

@@ -1,5 +1,5 @@
-export declare type Observer<T> = (v: T) => void;
+export type Observer<T> = (v: T) => void;
-export declare type Updater<T> = (v: T) => T;
+export type Updater<T> = (v: T) => T;
 export interface IObservable<T> {
     addObserver(observer: Observer<T | undefined>): void;
     removeObserver(observer: Observer<T | undefined>): void;

doric-js/lib/src/runtime/global.d.ts

@@ -1,6 +1,6 @@
 import { Panel } from "../ui/panel";
 import { ClassType } from "../util/types";
-export declare type BridgeContext = {
+export type BridgeContext = {
     /**
      * The identify of current context
      */

doric-js/lib/src/runtime/sandbox.d.ts

@@ -23,9 +23,9 @@ export declare function jsObtainContext(id: string): Context | undefined;
 export declare function jsReleaseContext(id: string): void;
 export declare function __require__(name: string): any;
 export declare function jsRegisterModule(name: string, moduleObject: any): void;
-export declare function jsCallEntityMethod(contextId: string, methodName: string, args?: any): any;
+export declare function jsCallEntityMethod(contextId: string, methodName: string, args?: any): unknown;
-export declare function pureCallEntityMethod(contextId: string, methodName: string, args?: any): any;
+export declare function pureCallEntityMethod(contextId: string, methodName: string, args?: any): unknown;
-declare type ClassType<T> = new (...args: any) => T;
+type ClassType<T> = new (...args: any) => T;
 export declare function jsObtainEntry(contextId: string): () => ClassType<object> | ((constructor: ClassType<object>) => ClassType<object>);
 export declare function jsCallbackTimer(timerId: number): void;
 export declare function jsHookAfterNativeCall(): void;

doric-js/lib/src/runtime/sandbox.js

@@ -71,6 +71,16 @@ export function jsCallReject(contextId, callbackId, args) {
     }
 }
 export class Context {
+    hookBeforeNativeCall() {
+        if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
+            Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
+        }
+    }
+    hookAfterNativeCall() {
+        if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
+            Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
+        }
+    }
     constructor(id) {
         this.callbacks = new Map;
         this.classes = new Map;
@@ -105,16 +115,6 @@ export class Context {
             }
         });
     }
-    hookBeforeNativeCall() {
-        if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
-            Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
-        }
-    }
-    hookAfterNativeCall() {
-        if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
-            Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
-        }
-    }
     callNative(namespace, method, args) {
         const callbackId = uniqueId('callback');
         return new Promise((resolve, reject) => {

doric-js/lib/src/ui/animation.d.ts

@@ -1,6 +1,6 @@
 import { Color } from "../util/color";
 import { Modeling, Model } from "../util/types";
-export declare type AnimatedKey = "translationX" | "translationY" | "scaleX" | "scaleY" | "rotation" | "pivotX" | "pivotY" | "rotationX" | "rotationY" | "backgroundColor" | "alpha";
+export type AnimatedKey = "translationX" | "translationY" | "scaleX" | "scaleY" | "rotation" | "pivotX" | "pivotY" | "rotationX" | "rotationY" | "backgroundColor" | "alpha";
 export declare enum RepeatMode {
     RESTART = 1,
     REVERSE = 2

doric-js/lib/src/ui/view.d.ts

@@ -7,14 +7,14 @@ import { FlexConfig } from "../util/flexbox";
 export declare function Property(target: Object, propKey: string): void;
 export declare function InconsistProperty(target: Object, propKey: string): void;
 export declare function ViewComponent(constructor: ClassType<any>): void;
-export declare type NativeViewModel = {
+export type NativeViewModel = {
     id: string;
     type: string;
     props: {
         [index: string]: Model;
     };
 };
-declare type RefType<T> = T extends Ref<infer R> ? R : never;
+type RefType<T> = T extends Ref<infer R> ? R : never;
 export declare class Ref<T extends View> {
     private view?;
     set current(v: T);
@@ -151,8 +151,8 @@ export declare abstract class Superview extends View {
     clean(): void;
     toModel(): NativeViewModel;
 }
-export declare type ViewArray = View[];
+export type ViewArray = View[];
-export declare type ViewFragment = View | ViewArray | undefined | null;
+export type ViewFragment = View | ViewArray | undefined | null;
 export declare abstract class Group extends Superview implements JSX.ElementChildrenAttribute {
     padding?: {
         left?: number;

doric-js/lib/src/ui/view.js

@@ -43,6 +43,24 @@ export function createRef() {
     return new Ref;
 }
 export class View {
+    callback2Id(f) {
+        const id = uniqueId('Function');
+        this.callbacks.set(id, f);
+        return id;
+    }
+    id2Callback(id) {
+        let f = this.callbacks.get(id);
+        if (f === undefined) {
+            f = Reflect.get(this, id);
+        }
+        return f;
+    }
+    findViewByTag(tag) {
+        if (tag === this.tag) {
+            return this;
+        }
+        return undefined;
+    }
     constructor() {
         this.width = 0;
         this.height = 0;
@@ -74,24 +92,6 @@ export class View {
             }
         });
     }
-    callback2Id(f) {
-        const id = uniqueId('Function');
-        this.callbacks.set(id, f);
-        return id;
-    }
-    id2Callback(id) {
-        let f = this.callbacks.get(id);
-        if (f === undefined) {
-            f = Reflect.get(this, id);
-        }
-        return f;
-    }
-    findViewByTag(tag) {
-        if (tag === this.tag) {
-            return this;
-        }
-        return undefined;
-    }
     /** Anchor start*/
     get left() {
         return this.x;

doric-js/lib/src/util/flexbox.d.ts

@@ -64,7 +64,7 @@ export declare enum Display {
     FLEX = 0,
     NONE = 1
 }
-export declare type FlexValue = FlexTypedValue | number;
+export type FlexValue = FlexTypedValue | number;
 export interface FlexConfig {
     direction?: Direction;
     flexDirection?: FlexDirection;

doric-js/lib/src/util/types.d.ts

@@ -2,11 +2,11 @@ export interface Modeling {
     toModel(): Model;
 }
 export declare function obj2Model(obj: Model, convertor: (v: Function) => string): Model;
-declare type _M = string | number | boolean | Modeling | {
+type _M = string | number | boolean | Modeling | {
     [index: string]: Model;
 } | undefined;
-export declare type Model = _M | Array<_M>;
+export type Model = _M | Array<_M>;
-export declare type Binder<T> = (v: T) => void;
+export type Binder<T> = (v: T) => void;
 export declare class Mutable<T> {
     private val;
     private binders;
@@ -16,5 +16,5 @@ export declare class Mutable<T> {
     bind(binder: Binder<T>): void;
     static of<E>(v: E): Mutable<E>;
 }
-export declare type ClassType<T> = new (...args: any) => T;
+export type ClassType<T> = new (...args: any) => T;
 export {};

doric-js/lib/src/widget/list.d.ts

@@ -49,6 +49,7 @@ export declare class List extends Superview {
     beforeDragging?: (from: number) => (Array<number> | void);
     onDragging?: (from: number, to: number) => void;
     onDragged?: (from: number, to: number) => void;
+    preloadItemCount?: number;
     scrollToItem(context: BridgeContext, index: number, config?: {
         animated?: boolean;
     }): Promise<any>;

doric-js/lib/src/widget/list.js

@@ -162,6 +162,10 @@ __decorate([
     Property,
     __metadata("design:type", Function)
 ], List.prototype, "onDragged", void 0);
+__decorate([
+    Property,
+    __metadata("design:type", Number)
+], List.prototype, "preloadItemCount", void 0);
 export function list(config) {
     const ret = new List;
     ret.apply(config);

doric-js/src/widget/list.ts

@@ -88,8 +88,8 @@ export class List extends Superview {
      * @param from 
      * @returns Returns the item of index which can dragged or not.
      */
-     @Property
+    @Property
-     itemCanDrag?: (from: number) => boolean
+    itemCanDrag?: (from: number) => boolean
 
     /**
      * @param from 
@@ -104,6 +104,9 @@ export class List extends Superview {
     @Property
     onDragged?: (from: number, to: number) => void
 
+    @Property
+    preloadItemCount?: number
+
     scrollToItem(context: BridgeContext, index: number, config?: { animated?: boolean, }) {
         const animated = config?.animated
         return this.nativeChannel(context, 'scrollToItem')({ index, animated, }) as Promise<any>

doric-web/dist/index.js

@@ -1278,6 +1278,16 @@ var doric = (function (exports) {
         }
     }
     class Context {
+        hookBeforeNativeCall() {
+            if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
+                Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
+            }
+        }
+        hookAfterNativeCall() {
+            if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
+                Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
+            }
+        }
         constructor(id) {
             this.callbacks = new Map;
             this.classes = new Map;
@@ -1312,16 +1322,6 @@ var doric = (function (exports) {
                 }
             });
         }
-        hookBeforeNativeCall() {
-            if (this.entity && Reflect.has(this.entity, 'hookBeforeNativeCall')) {
-                Reflect.apply(Reflect.get(this.entity, 'hookBeforeNativeCall'), this.entity, []);
-            }
-        }
-        hookAfterNativeCall() {
-            if (this.entity && Reflect.has(this.entity, 'hookAfterNativeCall')) {
-                Reflect.apply(Reflect.get(this.entity, 'hookAfterNativeCall'), this.entity, []);
-            }
-        }
         callNative(namespace, method, args) {
             const callbackId = uniqueId('callback');
             return new Promise((resolve, reject) => {
@@ -1776,6 +1776,24 @@ function createRef() {
     return new Ref;
 }
 class View {
+    callback2Id(f) {
+        const id = uniqueId('Function');
+        this.callbacks.set(id, f);
+        return id;
+    }
+    id2Callback(id) {
+        let f = this.callbacks.get(id);
+        if (f === undefined) {
+            f = Reflect.get(this, id);
+        }
+        return f;
+    }
+    findViewByTag(tag) {
+        if (tag === this.tag) {
+            return this;
+        }
+        return undefined;
+    }
     constructor() {
         this.width = 0;
         this.height = 0;
@@ -1807,24 +1825,6 @@ class View {
             }
         });
     }
-    callback2Id(f) {
-        const id = uniqueId('Function');
-        this.callbacks.set(id, f);
-        return id;
-    }
-    id2Callback(id) {
-        let f = this.callbacks.get(id);
-        if (f === undefined) {
-            f = Reflect.get(this, id);
-        }
-        return f;
-    }
-    findViewByTag(tag) {
-        if (tag === this.tag) {
-            return this;
-        }
-        return undefined;
-    }
     /** Anchor start*/
     get left() {
         return this.x;
@@ -3625,6 +3625,10 @@ __decorate$b([
     Property,
     __metadata$b("design:type", Function)
 ], List.prototype, "onDragged", void 0);
+__decorate$b([
+    Property,
+    __metadata$b("design:type", Number)
+], List.prototype, "preloadItemCount", void 0);
 function list(config) {
     const ret = new List;
     ret.apply(config);