From abdbf5c657b9d1d9a26a4d46dda2097be152f4ff Mon Sep 17 00:00:00 2001
From: bobzel <zzzman@gmail.com>
Date: Thu, 4 Aug 2022 17:03:21 -0400
Subject: fixed undo/redo for notetaking view.   fixed list undo/redo for
 schemaheaderfields -- not very elegant though.

---
 .../views/collections/CollectionNoteTakingView.tsx | 52 ++++++++--------
 .../collections/CollectionNoteTakingViewColumn.tsx | 39 ++----------
 src/fields/List.ts                                 | 72 ++++++++++++----------
 src/fields/util.ts                                 | 12 +++-
 4 files changed, 80 insertions(+), 95 deletions(-)

(limited to 'src')

diff --git a/src/client/views/collections/CollectionNoteTakingView.tsx b/src/client/views/collections/CollectionNoteTakingView.tsx
index f24b98621..1bf5b7d86 100644
--- a/src/client/views/collections/CollectionNoteTakingView.tsx
+++ b/src/client/views/collections/CollectionNoteTakingView.tsx
@@ -42,12 +42,10 @@ export type collectionNoteTakingViewProps = {
 
 @observer
 export class CollectionNoteTakingView extends CollectionSubView<Partial<collectionNoteTakingViewProps>>() {
-    _autoHeightDisposer?: IReactionDisposer;
+    _disposers: { [key: string]: IReactionDisposer } = {};
     _masonryGridRef: HTMLDivElement | null = null;
     _draggerRef = React.createRef<HTMLDivElement>();
-    // _docXfs: { height: () => number, width: () => number, noteTakingDocTransform: () => Transform }[] = [];
-    // @observable _docsByColumnHeader = new Map<string, Doc[]>();
-    //TODO: need to make sure that we save the mapping
+    @observable columnStartXCoords: number[] = [];
     @observable docsDraggedRowCol: number[] = [];
     @observable _cursor: CursorProperty = 'grab';
     @observable _scroll = 0; // used to force the document decoration to update when scrolling
@@ -86,7 +84,6 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     @computed get numGroupColumns() {
         return this.columnHeaders.length;
     }
-    @observable columnStartXCoords: number[] = [];
     @computed get PanelWidth() {
         return this.props.PanelWidth();
     }
@@ -100,11 +97,9 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
         super(props);
         if (this.columnHeaders === undefined) {
             this.dataDoc.columnHeaders = new List<SchemaHeaderField>([new SchemaHeaderField('New Column')]);
-            this.columnStartXCoords = [0];
             // add all of the docs that have not been added to a column to this new column
         } else {
-            const numHeaders = this.columnHeaders.length;
-            this.resizeColumns(numHeaders);
+            this.resizeColumns(this.columnHeaders.length);
         }
     }
 
@@ -126,7 +121,8 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
 
     // [CAVEATS] (1) keep track of the offsetting
     // (2) documentView gets unmounted as you remove it from the list
-    get Sections() {
+    @computed get Sections() {
+        TraceMobx();
         const columnHeaders = this.columnHeaders;
         let docs = this.childDocs;
         const sections = new Map<SchemaHeaderField, Doc[]>(columnHeaders.map(sh => [sh, []] as [SchemaHeaderField, []]));
@@ -169,16 +165,21 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     componentDidMount() {
         super.componentDidMount?.();
         document.addEventListener('pointerup', this.removeDocDragHighlight, true);
-        this._autoHeightDisposer = reaction(
+        this._disposers.autoHeight = reaction(
             () => this.layoutDoc._autoHeight,
             autoHeight => autoHeight && this.props.setHeight?.(Math.min(NumCast(this.layoutDoc._maxHeight, Number.MAX_SAFE_INTEGER), this.headerMargin + Math.max(...this.refList.map(r => Number(getComputedStyle(r).height.replace('px', ''))))))
         );
+        this._disposers.headers = reaction(
+            () => this.columnHeaders.slice(),
+            headers => this.resizeColumns(headers.length),
+            { fireImmediately: true }
+        );
     }
 
     componentWillUnmount() {
         document.removeEventListener('pointerup', this.removeDocDragHighlight, true);
         super.componentWillUnmount();
-        this._autoHeightDisposer?.();
+        Object.keys(this._disposers).forEach(key => this._disposers[key]());
     }
 
     @action
@@ -315,9 +316,8 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     // how to get the width of a document. Currently returns the width of the column (minus margins)
     // if a note doc. Otherwise, returns the normal width (for graphs, images, etc...)
     getDocWidth(d: Doc) {
-        const heading = (d[this.notetakingCategoryField] as object) ?? 'unset';
-        const castedSectionValue = heading.toString();
-        const existingHeader = this.columnHeaders.find(sh => sh.heading === castedSectionValue);
+        const heading = StrCast(d[this.notetakingCategoryField], 'unset');
+        const existingHeader = this.columnHeaders.find(sh => sh.heading === heading);
         const colStartXCoords = this.columnStartXCoords;
         if (!existingHeader) {
             return 1000;
@@ -352,6 +352,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     }
 
     // called when a column is either added or deleted. This function creates n evenly spaced columns
+    @action
     resizeColumns = (n: number) => {
         const totalWidth = this.PanelWidth;
         const dividerWidth = 32;
@@ -368,8 +369,8 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
 
     // This function is used to preview where a document will drop in a column once a drag is complete.
     @action
-    onPointerOver = (ex: number, ey: number) => {
-        if (this.childDocList) {
+    onPointerOver = (buttons: boolean, ex: number, ey: number) => {
+        if (this.childDocList && buttons) {
             // get the current docs for the column based on the mouse's x coordinate
             // will use again later, which is why we're saving as local
             const xCoord = this.props.ScreenToLocalTransform().transformPoint(ex, ey)[0] - 2 * this.gridGap;
@@ -500,7 +501,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     onExternalDrop = async (e: React.DragEvent): Promise<void> => {
         const targInd = this.docsDraggedRowCol?.[0] || 0;
         super.onExternalDrop(e, {}, docus => {
-            this.onPointerOver(e.clientX, e.clientY);
+            this.onPointerOver(true, e.clientX, e.clientY);
             docus?.map(doc => this.addDocument(doc));
             const newDoc = this.childDocs.lastElement();
             const docs = this.childDocList;
@@ -515,6 +516,11 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
     headings = () => Array.from(this.Sections);
 
     refList: any[] = [];
+    editableViewProps = () => ({
+        GetValue: () => '',
+        SetValue: this.addGroup,
+        contents: '+ New Column',
+    });
 
     sectionNoteTaking = (heading: SchemaHeaderField | undefined, docList: Doc[]) => {
         const type = 'number';
@@ -544,7 +550,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
                 columnHeaders={this.columnHeaders}
                 Document={this.props.Document}
                 DataDoc={this.props.DataDoc}
-                resizeColumns={this.resizeColumns.bind(this)}
+                resizeColumns={this.resizeColumns}
                 renderChildren={this.children}
                 numGroupColumns={this.numGroupColumns}
                 gridGap={this.gridGap}
@@ -561,11 +567,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
                 type={type}
                 createDropTarget={this.createDashEventsTarget}
                 screenToLocalTransform={this.props.ScreenToLocalTransform}
-                editableViewProps={{
-                    GetValue: () => '',
-                    SetValue: this.addGroup,
-                    contents: '+ New Column',
-                }}
+                editableViewProps={this.editableViewProps}
             />
         );
     };
@@ -622,7 +624,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
             const col = this.sectionNoteTaking(sections[i][0], sections[i][1]);
             eles.push(col);
             if (i < sections.length - 1) {
-                eles.push(<CollectionNoteTakingViewDivider key={`divider${i}`} index={i + 1} setColumnStartXCoords={this.setColumnStartXCoords.bind(this)} xMargin={this.xMargin} />);
+                eles.push(<CollectionNoteTakingViewDivider key={`divider${i}`} index={i + 1} setColumnStartXCoords={this.setColumnStartXCoords} xMargin={this.xMargin} />);
             }
         }
         return eles;
@@ -705,7 +707,7 @@ export class CollectionNoteTakingView extends CollectionSubView<Partial<collecti
                     }}
                     onScroll={action(e => (this._scroll = e.currentTarget.scrollTop))}
                     onPointerLeave={action(e => (this.docsDraggedRowCol.length = 0))}
-                    onPointerOver={e => this.onPointerOver(e.clientX, e.clientY)}
+                    onPointerOver={e => this.onPointerOver(e.buttons ? true : false, e.clientX, e.clientY)}
                     onDrop={this.onExternalDrop.bind(this)}
                     onContextMenu={this.onContextMenu}
                     onWheel={e => this.props.isContentActive(true) && e.stopPropagation()}>
diff --git a/src/client/views/collections/CollectionNoteTakingViewColumn.tsx b/src/client/views/collections/CollectionNoteTakingViewColumn.tsx
index 8452d895f..9b7518c60 100644
--- a/src/client/views/collections/CollectionNoteTakingViewColumn.tsx
+++ b/src/client/views/collections/CollectionNoteTakingViewColumn.tsx
@@ -47,7 +47,7 @@ interface CSVFieldColumnProps {
     screenToLocalTransform: () => Transform;
     observeHeight: (myref: any) => void;
     unobserveHeight: (myref: any) => void;
-    editableViewProps: any;
+    editableViewProps: () => any;
     resizeColumns: (n: number) => void;
     columnStartXCoords: number[];
     PanelWidth: number;
@@ -112,7 +112,6 @@ export class CollectionNoteTakingViewColumn extends React.Component<CSVFieldColu
 
     @action
     headingChanged = (value: string, shiftDown?: boolean) => {
-        console.log('HEADING CH');
         const castedValue = this.getValue(value);
         if (castedValue) {
             if (this.props.columnHeaders?.map(i => i.heading).indexOf(castedValue.toString()) !== -1) {
@@ -144,43 +143,17 @@ export class CollectionNoteTakingViewColumn extends React.Component<CSVFieldColu
         return this.props.addDocument?.(newDoc) || false;
     };
 
+    @undoBatch
     @action
     deleteColumn = () => {
-        if (!this.props.columnHeaders) {
-            return;
-        }
-        if (this.props.headingObject) {
+        if (this.props.columnHeaders && this.props.headingObject) {
             const index = this.props.columnHeaders.indexOf(this.props.headingObject);
-            const newIndex = index == 0 ? 1 : index - 1;
-            const newHeader = this.props.columnHeaders[newIndex];
-            this.props.docList.forEach(d => (d[this.props.pivotField] = newHeader.heading.toString()));
+            this.props.docList.forEach(d => (d[this.props.pivotField] = 'unset'));
             this.props.columnHeaders.splice(index, 1);
             this.props.resizeColumns(this.props.columnHeaders.length);
         }
     };
 
-    headerDown = (e: React.PointerEvent<HTMLDivElement>) => setupMoveUpEvents(this, e, this.startDrag, emptyFunction, emptyFunction);
-
-    //TODO: I think this is where I'm supposed to edit stuff
-    startDrag = (e: PointerEvent, down: number[], delta: number[]) => {
-        console.log('in startDrag');
-        // is MakeAlias a way to make a copy of a doc without rendering it?
-        const alias = Doc.MakeAlias(this.props.Document);
-        // alias._width = this.props.columnWidth / (this.props.columnHeaders?.length || 1);
-        alias._width = this.columnWidth;
-        alias._pivotField = undefined;
-        let value = this.getValue(this._heading);
-        value = typeof value === 'string' ? `"${value}"` : value;
-        alias.viewSpecScript = ScriptField.MakeFunction(`doc.${this.props.pivotField} === ${value}`, { doc: Doc.name });
-        if (alias.viewSpecScript) {
-            const options = { hideSource: false };
-            DragManager.StartDocumentDrag([this._headerRef.current!], new DragManager.DocumentDragData([alias]), e.clientX, e.clientY, options);
-            console.log('in startDrag');
-            return true;
-        }
-        return false;
-    };
-
     menuCallback = (x: number, y: number) => {
         ContextMenu.Instance.clearItems();
         const layoutItems: ContextMenuProps[] = [];
@@ -256,7 +229,6 @@ export class CollectionNoteTakingViewColumn extends React.Component<CSVFieldColu
 
     @computed get innards() {
         TraceMobx();
-        console.log('INNARD START');
         const key = this.props.pivotField;
         const heading = this._heading;
         const columnYMargin = this.props.headingObject ? 0 : this.props.yMargin;
@@ -274,7 +246,6 @@ export class CollectionNoteTakingViewColumn extends React.Component<CSVFieldColu
                 }}>
                 <div
                     className="collectionNoteTakingView-sectionHeader-subCont"
-                    onPointerDown={this.headerDown}
                     title={evContents === `No Value` ? `Documents that don't have a ${key} value will go here. This column cannot be removed.` : ''}
                     style={{ background: evContents !== `No Value` ? this._color : 'inherit' }}>
                     <EditableView GetValue={() => evContents} SetValue={this.headingChanged} contents={evContents} oneLine={true} />
@@ -314,7 +285,7 @@ export class CollectionNoteTakingViewColumn extends React.Component<CSVFieldColu
                                     <EditableView GetValue={returnEmptyString} SetValue={this.addNewTextDoc} textCallback={this.textCallback} placeholder={"Type ':' for commands"} contents={'+ New Node'} menuCallback={this.menuCallback} />
                                 </div>
                                 <div key={`${this.props.Document[Id]}-addGroup`} className="collectionNoteTakingView-addDocumentButton">
-                                    <EditableView {...this.props.editableViewProps} />
+                                    <EditableView {...this.props.editableViewProps()} />
                                 </div>
                                 {this.props.columnHeaders?.length && this.props.columnHeaders.length > 1 && (
                                     <button className="collectionNoteTakingView-sectionDelete" onClick={this.deleteColumn}>
diff --git a/src/fields/List.ts b/src/fields/List.ts
index b15548327..5cc4ca543 100644
--- a/src/fields/List.ts
+++ b/src/fields/List.ts
@@ -1,25 +1,25 @@
-import { action, observable } from "mobx";
-import { alias, list, serializable } from "serializr";
-import { DocServer } from "../client/DocServer";
-import { ScriptingGlobals } from "../client/util/ScriptingGlobals";
-import { afterDocDeserialize, autoObject, Deserializable } from "../client/util/SerializationHelper";
-import { Field } from "./Doc";
-import { Copy, OnUpdate, Parent, Self, SelfProxy, ToScriptString, ToString, Update } from "./FieldSymbols";
-import { ObjectField } from "./ObjectField";
-import { ProxyField } from "./Proxy";
-import { RefField } from "./RefField";
-import { listSpec } from "./Schema";
-import { Cast } from "./Types";
-import { deleteProperty, getter, setter, updateFunction } from "./util";
+import { action, observable } from 'mobx';
+import { alias, list, serializable } from 'serializr';
+import { DocServer } from '../client/DocServer';
+import { ScriptingGlobals } from '../client/util/ScriptingGlobals';
+import { afterDocDeserialize, autoObject, Deserializable } from '../client/util/SerializationHelper';
+import { Field } from './Doc';
+import { Copy, OnUpdate, Parent, Self, SelfProxy, ToScriptString, ToString, Update } from './FieldSymbols';
+import { ObjectField } from './ObjectField';
+import { ProxyField } from './Proxy';
+import { RefField } from './RefField';
+import { listSpec } from './Schema';
+import { Cast } from './Types';
+import { deleteProperty, getter, setter, updateFunction } from './util';
 
 const listHandlers: any = {
     /// Mutator methods
     copyWithin() {
-        throw new Error("copyWithin not supported yet");
+        throw new Error('copyWithin not supported yet');
     },
     fill(value: any, start?: number, end?: number) {
         if (value instanceof RefField) {
-            throw new Error("fill with RefFields not supported yet");
+            throw new Error('fill with RefFields not supported yet');
         }
         const res = this[Self].__fields.fill(value, start, end);
         this[Update]();
@@ -44,7 +44,7 @@ const listHandlers: any = {
             }
         }
         const res = list.__fields.push(...items);
-        this[Update]({ op: "$addToSet", items, length: length + items.length });
+        this[Update]({ op: '$addToSet', items, length: length + items.length });
         return res;
     }),
     reverse() {
@@ -78,8 +78,13 @@ const listHandlers: any = {
             }
         }
         const res = list.__fields.splice(start, deleteCount, ...items);
-        this[Update](items.length === 0 && deleteCount ? { op: "$remFromSet", items: removed, length: list.__fields.length } :
-            items.length && !deleteCount && start === list.__fields.length ? { op: "$addToSet", items, length: list.__fields.length } : undefined);
+        this[Update](
+            items.length === 0 && deleteCount
+                ? { op: '$remFromSet', items: removed, length: list.__fields.length }
+                : items.length && !deleteCount && start === list.__fields.length
+                ? { op: '$addToSet', items, length: list.__fields.length }
+                : undefined
+        );
         return res.map(toRealField);
     }),
     unshift(...items: any[]) {
@@ -98,7 +103,6 @@ const listHandlers: any = {
         const res = this[Self].__fields.unshift(...items);
         this[Update]();
         return res;
-
     },
     /// Accessor methods
     concat: action(function (this: any, ...items: any[]) {
@@ -198,7 +202,7 @@ const listHandlers: any = {
     },
     [Symbol.iterator]() {
         return this[Self].__realFields().values();
-    }
+    },
 };
 
 function toObjectField(field: Field) {
@@ -217,14 +221,14 @@ function listGetter(target: any, prop: string | number | symbol, receiver: any):
 }
 
 interface ListSpliceUpdate<T> {
-    type: "splice";
+    type: 'splice';
     index: number;
     added: T[];
     removedCount: number;
 }
 
 interface ListIndexUpdate<T> {
-    type: "update";
+    type: 'update';
     index: number;
     newValue: T;
 }
@@ -233,7 +237,7 @@ type ListUpdate<T> = ListSpliceUpdate<T> | ListIndexUpdate<T>;
 
 type StoredType<T extends Field> = T extends RefField ? ProxyField<T> : T;
 
-@Deserializable("list")
+@Deserializable('list')
 class ListImpl<T extends Field> extends ObjectField {
     constructor(fields?: T[]) {
         super();
@@ -244,14 +248,16 @@ class ListImpl<T extends Field> extends ObjectField {
             getOwnPropertyDescriptor: (target, prop) => {
                 if (prop in target.__fields) {
                     return {
-                        configurable: true,//TODO Should configurable be true?
+                        configurable: true, //TODO Should configurable be true?
                         enumerable: true,
                     };
                 }
                 return Reflect.getOwnPropertyDescriptor(target, prop);
             },
             deleteProperty: deleteProperty,
-            defineProperty: () => { throw new Error("Currently properties can't be defined on documents using Object.defineProperty"); },
+            defineProperty: () => {
+                throw new Error("Currently properties can't be defined on documents using Object.defineProperty");
+            },
         });
         this[SelfProxy] = list;
         if (fields) {
@@ -265,7 +271,7 @@ class ListImpl<T extends Field> extends ObjectField {
     // this requests all ProxyFields at the same time to avoid the overhead
     // of separate network requests and separate updates to the React dom.
     private __realFields() {
-        const promised = this.__fields.filter(f => f instanceof ProxyField && f.promisedValue()).map(f => ({ field: f as any, promisedFieldId: (f instanceof ProxyField) ? f.promisedValue() : "" }));
+        const promised = this.__fields.filter(f => f instanceof ProxyField && f.promisedValue()).map(f => ({ field: f as any, promisedFieldId: f instanceof ProxyField ? f.promisedValue() : '' }));
         // if we find any ProxyFields that don't have a current value, then
         // start the server request for all of them
         if (promised.length) {
@@ -282,7 +288,7 @@ class ListImpl<T extends Field> extends ObjectField {
         return this.__fields.map(toRealField);
     }
 
-    @serializable(alias("fields", list(autoObject(), { afterDeserialize: afterDocDeserialize })))
+    @serializable(alias('fields', list(autoObject(), { afterDeserialize: afterDocDeserialize })))
     private get __fields() {
         return this.___fields;
     }
@@ -299,7 +305,7 @@ class ListImpl<T extends Field> extends ObjectField {
     }
 
     [Copy]() {
-        const copiedData = this[Self].__fields.map(f => f instanceof ObjectField ? f[Copy]() : f);
+        const copiedData = this[Self].__fields.map(f => (f instanceof ObjectField ? f[Copy]() : f));
         const deepCopy = new ListImpl<T>(copiedData as any);
         return deepCopy;
     }
@@ -313,7 +319,7 @@ class ListImpl<T extends Field> extends ObjectField {
         const update = this[OnUpdate];
         // update && update(diff);
         update?.(diff);
-    }
+    };
 
     private [Self] = this;
     private [SelfProxy]: any;
@@ -328,9 +334,9 @@ class ListImpl<T extends Field> extends ObjectField {
 export type List<T extends Field> = ListImpl<T> & (T | (T extends RefField ? Promise<T> : never))[];
 export const List: { new <T extends Field>(fields?: T[]): List<T> } = ListImpl as any;
 
-ScriptingGlobals.add("List", List);
+ScriptingGlobals.add('List', List);
 ScriptingGlobals.add(function compareLists(l1: any, l2: any) {
-    const L1 = Cast(l1, listSpec("string"), []);
-    const L2 = Cast(l2, listSpec("string"), []);
+    const L1 = Cast(l1, listSpec('string'), []);
+    const L2 = Cast(l2, listSpec('string'), []);
     return !L1 && !L2 ? true : L1 && L2 && L1.length === L2.length && L2.reduce((p, v) => p && L1.includes(v), true);
-}, "compare two lists");
\ No newline at end of file
+}, 'compare two lists');
diff --git a/src/fields/util.ts b/src/fields/util.ts
index 41e723119..d87bb6656 100644
--- a/src/fields/util.ts
+++ b/src/fields/util.ts
@@ -33,6 +33,7 @@ import { ObjectField } from './ObjectField';
 import { PrefetchProxy, ProxyField } from './Proxy';
 import { RefField } from './RefField';
 import { RichTextField } from './RichTextField';
+import { SchemaHeaderField } from './SchemaHeaderField';
 import { ComputedField } from './ScriptField';
 import { ScriptCast, StrCast } from './Types';
 
@@ -455,7 +456,7 @@ export function updateFunction(target: any, prop: any, value: any, receiver: any
                         ? {
                               redo: action(() => {
                                   diff.items.forEach((item: any) => {
-                                      const ind = receiver[prop].indexOf(item.value ? item.value() : item);
+                                      const ind = item instanceof SchemaHeaderField ? receiver[prop].findIndex((ele: any) => ele instanceof SchemaHeaderField && ele.heading === item.heading) : receiver[prop].indexOf(item.value ? item.value() : item);
                                       ind !== -1 && receiver[prop].splice(ind, 1);
                                   });
                                   lastValue = ObjectField.MakeCopy(receiver[prop]);
@@ -463,8 +464,13 @@ export function updateFunction(target: any, prop: any, value: any, receiver: any
                               undo: () => {
                                   // console.log("undo $rem: " + prop, diff.items) // bcz: uncomment to log undo
                                   diff.items.forEach((item: any) => {
-                                      const ind = (prevValue as List<any>).indexOf(item.value ? item.value() : item);
-                                      ind !== -1 && receiver[prop].indexOf(item.value ? item.value() : item) === -1 && receiver[prop].splice(ind, 0, item);
+                                      if (item instanceof SchemaHeaderField) {
+                                          const ind = (prevValue as List<any>).findIndex((ele: any) => ele instanceof SchemaHeaderField && ele.heading === item.heading);
+                                          ind !== -1 && receiver[prop].findIndex((ele: any) => ele instanceof SchemaHeaderField && ele.heading === item.heading) === -1 && receiver[prop].splice(ind, 0, item);
+                                      } else {
+                                          const ind = (prevValue as List<any>).indexOf(item.value ? item.value() : item);
+                                          ind !== -1 && receiver[prop].indexOf(item.value ? item.value() : item) === -1 && receiver[prop].splice(ind, 0, item);
+                                      }
                                   });
                                   lastValue = ObjectField.MakeCopy(receiver[prop]);
                               },
-- 
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