major changes to drag and drop

12 files changed, 109 insertions, 115 deletions

diff --git a/src/client/views/collections/CollectionDockingView.tsx b/src/client/views/collections/CollectionDockingView.tsx
index ffcb3e9ce..08b9fd216 100644
--- a/src/client/views/collections/CollectionDockingView.tsx
+++ b/src/client/views/collections/CollectionDockingView.tsx
@@ -20,7 +20,7 @@ import { emptyFunction, returnEmptyString, returnFalse, returnOne, returnTrue, U
 import { DocServer } from "../../DocServer";
 import { Docs } from '../../documents/Documents';
 import { DocumentManager } from '../../util/DocumentManager';
-import { DragLinksAsDocuments, DragManager } from "../../util/DragManager";
+import { DragManager } from "../../util/DragManager";
 import { SelectionManager } from '../../util/SelectionManager';
 import { Transform } from '../../util/Transform';
 import { undoBatch } from "../../util/UndoManager";
@@ -346,7 +346,7 @@ export class CollectionDockingView extends React.Component<SubCollectionViewProp
             const docid = (e.target as any).DashDocId;
             const tab = (e.target as any).parentElement as HTMLElement;
             DocServer.GetRefField(docid).then(action(async (sourceDoc: Opt<Field>) =>
-                (sourceDoc instanceof Doc) && DragLinksAsDocuments(tab, x, y, sourceDoc)));
+                (sourceDoc instanceof Doc) && DragManager.StartLinkTargetsDrag(tab, x, y, sourceDoc)));
         }
         if (className === "lm_drag_handle" || className === "lm_close" || className === "lm_maximise" || className === "lm_minimise" || className === "lm_close_tab") {
             this._flush = true;
@@ -419,15 +419,13 @@ export class CollectionDockingView extends React.Component<SubCollectionViewProp
                 };
                 ReactDOM.render(<span title="Drag as document"
                     className="collectionDockingView-dragAsDocument"
-                    onPointerDown={
-                        e => {
-                            e.preventDefault();
-                            e.stopPropagation();
-                            DragManager.StartDocumentDrag([dragSpan], new DragManager.DocumentDragData([doc]), e.clientX, e.clientY, {
-                                handlers: { dragComplete: emptyFunction },
-                                hideSource: false
-                            });
-                        }}><FontAwesomeIcon icon="file" size="lg" /></span>, dragSpan);
+                    onPointerDown={e => {
+                        e.preventDefault();
+                        e.stopPropagation();
+                        DragManager.StartDocumentDrag([dragSpan], new DragManager.DocumentDragData([doc]), e.clientX, e.clientY);
+                    }}>
+                    <FontAwesomeIcon icon="file" size="lg" />
+                </span>, dragSpan);
                 ReactDOM.render(<ButtonSelector Document={doc} Stack={stack} />, gearSpan);
                 tab.reactComponents = [dragSpan, gearSpan, upDiv];
                 tab.element.append(dragSpan);
diff --git a/src/client/views/collections/CollectionMasonryViewFieldRow.tsx b/src/client/views/collections/CollectionMasonryViewFieldRow.tsx
index d697e721b..80752303c 100644
--- a/src/client/views/collections/CollectionMasonryViewFieldRow.tsx
+++ b/src/client/views/collections/CollectionMasonryViewFieldRow.tsx
@@ -56,7 +56,7 @@ export class CollectionMasonryViewFieldRow extends React.Component<CMVFieldRowPr
     createRowDropRef = (ele: HTMLDivElement | null) => {
         this._dropDisposer && this._dropDisposer();
         if (ele) {
-            this._dropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.rowDrop.bind(this) } });
+            this._dropDisposer = DragManager.MakeDropTarget(ele, this.rowDrop.bind(this));
         }
     }
 
@@ -74,12 +74,12 @@ export class CollectionMasonryViewFieldRow extends React.Component<CMVFieldRowPr
     @undoBatch
     rowDrop = action((e: Event, de: DragManager.DropEvent) => {
         this._createAliasSelected = false;
-        if (de.data instanceof DragManager.DocumentDragData) {
+        if (de.complete.docDragData) {
             (this.props.parent.Document.dropConverter instanceof ScriptField) &&
-                this.props.parent.Document.dropConverter.script.run({ dragData: de.data });
+                this.props.parent.Document.dropConverter.script.run({ dragData: de.complete.docDragData });
             const key = StrCast(this.props.parent.props.Document.sectionFilter);
             const castedValue = this.getValue(this._heading);
-            de.data.droppedDocuments.forEach(d => d[key] = castedValue);
+            de.complete.docDragData.droppedDocuments.forEach(d => d[key] = castedValue);
             this.props.parent.drop(e, de);
             e.stopPropagation();
         }
@@ -171,10 +171,8 @@ export class CollectionMasonryViewFieldRow extends React.Component<CMVFieldRowPr
             const script = `return doc.${key} === ${value}`;
             const compiled = CompileScript(script, { params: { doc: Doc.name } });
             if (compiled.compiled) {
-                const scriptField = new ScriptField(compiled);
-                alias.viewSpecScript = scriptField;
-                const dragData = new DragManager.DocumentDragData([alias]);
-                DragManager.StartDocumentDrag([this._headerRef.current!], dragData, e.clientX, e.clientY);
+                alias.viewSpecScript = new ScriptField(compiled);
+                DragManager.StartDocumentDrag([this._headerRef.current!], new DragManager.DocumentDragData([alias]), e.clientX, e.clientY);
             }
 
             e.stopPropagation();
diff --git a/src/client/views/collections/CollectionSchemaCells.tsx b/src/client/views/collections/CollectionSchemaCells.tsx
index 171dc4606..79a34bc00 100644
--- a/src/client/views/collections/CollectionSchemaCells.tsx
+++ b/src/client/views/collections/CollectionSchemaCells.tsx
@@ -37,7 +37,7 @@ export interface CellProps {
     renderDepth: number;
     addDocTab: (document: Doc, dataDoc: Doc | undefined, where: string) => boolean;
     pinToPres: (document: Doc) => void;
-    moveDocument: (document: Doc, targetCollection: Doc, addDocument: (document: Doc) => boolean) => boolean;
+    moveDocument: (document: Doc, targetCollection: Doc | undefined, addDocument: (document: Doc) => boolean) => boolean;
     isFocused: boolean;
     changeFocusedCellByIndex: (row: number, col: number) => void;
     setIsEditing: (isEditing: boolean) => void;
@@ -105,13 +105,13 @@ export class CollectionSchemaCell extends React.Component<CellProps> {
     }
 
     private drop = (e: Event, de: DragManager.DropEvent) => {
-        if (de.data instanceof DragManager.DocumentDragData) {
+        if (de.complete.docDragData) {
             const fieldKey = this.props.rowProps.column.id as string;
-            if (de.data.draggedDocuments.length === 1) {
-                this._document[fieldKey] = de.data.draggedDocuments[0];
+            if (de.complete.docDragData.draggedDocuments.length === 1) {
+                this._document[fieldKey] = de.complete.docDragData.draggedDocuments[0];
             }
             else {
-                const coll = Docs.Create.SchemaDocument([new SchemaHeaderField("title", "#f1efeb")], de.data.draggedDocuments, {});
+                const coll = Docs.Create.SchemaDocument([new SchemaHeaderField("title", "#f1efeb")], de.complete.docDragData.draggedDocuments, {});
                 this._document[fieldKey] = coll;
             }
             e.stopPropagation();
@@ -121,7 +121,7 @@ export class CollectionSchemaCell extends React.Component<CellProps> {
     private dropRef = (ele: HTMLElement | null) => {
         this._dropDisposer && this._dropDisposer();
         if (ele) {
-            this._dropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.drop.bind(this) } });
+            this._dropDisposer = DragManager.MakeDropTarget(ele, this.drop.bind(this));
         }
     }
 
@@ -167,11 +167,10 @@ export class CollectionSchemaCell extends React.Component<CellProps> {
         const fieldIsDoc = (type === "document" && typeof field === "object") || (typeof field === "object" && doc);
 
         const onItemDown = (e: React.PointerEvent) => {
-            if (fieldIsDoc) {
-                SetupDrag(this._focusRef, () => this._document[props.fieldKey] instanceof Doc ? this._document[props.fieldKey] : this._document,
-                    this._document[props.fieldKey] instanceof Doc ? (doc: Doc, target: Doc, addDoc: (newDoc: Doc) => any) => addDoc(doc) : this.props.moveDocument,
-                    this._document[props.fieldKey] instanceof Doc ? "alias" : this.props.Document.schemaDoc ? "copy" : undefined)(e);
-            }
+            fieldIsDoc && SetupDrag(this._focusRef,
+                () => this._document[props.fieldKey] instanceof Doc ? this._document[props.fieldKey] : this._document,
+                this._document[props.fieldKey] instanceof Doc ? (doc: Doc, target: Doc | undefined, addDoc: (newDoc: Doc) => any) => addDoc(doc) : this.props.moveDocument,
+                this._document[props.fieldKey] instanceof Doc ? "alias" : this.props.Document.schemaDoc ? "copy" : undefined)(e);
         };
         const onPointerEnter = (e: React.PointerEvent): void => {
             if (e.buttons === 1 && SelectionManager.GetIsDragging() && (type === "document" || type === undefined)) {
diff --git a/src/client/views/collections/CollectionSchemaMovableTableHOC.tsx b/src/client/views/collections/CollectionSchemaMovableTableHOC.tsx
index 90320df82..153bbd410 100644
--- a/src/client/views/collections/CollectionSchemaMovableTableHOC.tsx
+++ b/src/client/views/collections/CollectionSchemaMovableTableHOC.tsx
@@ -56,7 +56,7 @@ export class MovableColumn extends React.Component<MovableColumnProps> {
     createColDropTarget = (ele: HTMLDivElement) => {
         this._colDropDisposer && this._colDropDisposer();
         if (ele) {
-            this._colDropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.colDrop.bind(this) } });
+            this._colDropDisposer = DragManager.MakeDropTarget(ele, this.colDrop.bind(this));
         }
     }
 
@@ -66,8 +66,8 @@ export class MovableColumn extends React.Component<MovableColumnProps> {
         const rect = this._header!.current!.getBoundingClientRect();
         const bounds = this.props.ScreenToLocalTransform().transformPoint(rect.left + ((rect.right - rect.left) / 2), rect.top);
         const before = x[0] < bounds[0];
-        if (de.data instanceof DragManager.ColumnDragData) {
-            this.props.reorderColumns(de.data.colKey, this.props.columnValue, before, this.props.allColumns);
+        if (de.complete.columnDragData) {
+            this.props.reorderColumns(de.complete.columnDragData.colKey, this.props.columnValue, before, this.props.allColumns);
             return true;
         }
         return false;
@@ -165,7 +165,7 @@ export class MovableRow extends React.Component<MovableRowProps> {
     createRowDropTarget = (ele: HTMLDivElement) => {
         this._rowDropDisposer && this._rowDropDisposer();
         if (ele) {
-            this._rowDropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.rowDrop.bind(this) } });
+            this._rowDropDisposer = DragManager.MakeDropTarget(ele, this.rowDrop.bind(this));
         }
     }
 
@@ -178,16 +178,17 @@ export class MovableRow extends React.Component<MovableRowProps> {
         const bounds = this.props.ScreenToLocalTransform().transformPoint(rect.left, rect.top + rect.height / 2);
         const before = x[1] < bounds[1];
 
-        if (de.data instanceof DragManager.DocumentDragData) {
+        const docDragData = de.complete.docDragData;
+        if (docDragData) {
             e.stopPropagation();
-            if (de.data.draggedDocuments[0] === rowDoc) return true;
+            if (docDragData.draggedDocuments[0] === rowDoc) return true;
             const addDocument = (doc: Doc) => this.props.addDoc(doc, rowDoc, before);
-            const movedDocs = de.data.draggedDocuments;
-            return (de.data.dropAction || de.data.userDropAction) ?
-                de.data.droppedDocuments.reduce((added: boolean, d) => this.props.addDoc(d, rowDoc, before) || added, false)
-                : (de.data.moveDocument) ?
-                    movedDocs.reduce((added: boolean, d) => de.data.moveDocument(d, rowDoc, addDocument) || added, false)
-                    : de.data.droppedDocuments.reduce((added: boolean, d) => this.props.addDoc(d, rowDoc, before), false);
+            const movedDocs = docDragData.draggedDocuments;
+            return (docDragData.dropAction || docDragData.userDropAction) ?
+                docDragData.droppedDocuments.reduce((added: boolean, d) => this.props.addDoc(d, rowDoc, before) || added, false)
+                : (docDragData.moveDocument) ?
+                    movedDocs.reduce((added: boolean, d) => docDragData.moveDocument?.(d, rowDoc, addDocument) || added, false)
+                    : docDragData.droppedDocuments.reduce((added: boolean, d) => this.props.addDoc(d, rowDoc, before), false);
         }
         return false;
     }
@@ -199,12 +200,12 @@ export class MovableRow extends React.Component<MovableRowProps> {
 
     @undoBatch
     @action
-    move: DragManager.MoveFunction = (doc: Doc, target: Doc, addDoc) => {
-        const targetView = DocumentManager.Instance.getDocumentView(target);
+    move: DragManager.MoveFunction = (doc: Doc, targetCollection: Doc | undefined, addDoc) => {
+        const targetView = targetCollection && DocumentManager.Instance.getDocumentView(targetCollection);
         if (targetView && targetView.props.ContainingCollectionDoc) {
-            return doc !== target && doc !== targetView.props.ContainingCollectionDoc && this.props.removeDoc(doc) && addDoc(doc);
+            return doc !== targetCollection && doc !== targetView.props.ContainingCollectionDoc && this.props.removeDoc(doc) && addDoc(doc);
         }
-        return doc !== target && this.props.removeDoc(doc) && addDoc(doc);
+        return doc !== targetCollection && this.props.removeDoc(doc) && addDoc(doc);
     }
 
     render() {
diff --git a/src/client/views/collections/CollectionSchemaView.tsx b/src/client/views/collections/CollectionSchemaView.tsx
index 8169e9e2b..bb706e528 100644
--- a/src/client/views/collections/CollectionSchemaView.tsx
+++ b/src/client/views/collections/CollectionSchemaView.tsx
@@ -224,7 +224,7 @@ export interface SchemaTableProps {
     renderDepth: number;
     deleteDocument: (document: Doc) => boolean;
     addDocument: (document: Doc) => boolean;
-    moveDocument: (document: Doc, targetCollection: Doc, addDocument: (document: Doc) => boolean) => boolean;
+    moveDocument: (document: Doc, targetCollection: Doc | undefined, addDocument: (document: Doc) => boolean) => boolean;
     ScreenToLocalTransform: () => Transform;
     active: (outsideReaction: boolean) => boolean;
     onDrop: (e: React.DragEvent<Element>, options: DocumentOptions, completed?: (() => void) | undefined) => void;
diff --git a/src/client/views/collections/CollectionStackingView.tsx b/src/client/views/collections/CollectionStackingView.tsx
index ff3417b77..6a23920f3 100644
--- a/src/client/views/collections/CollectionStackingView.tsx
+++ b/src/client/views/collections/CollectionStackingView.tsx
@@ -147,7 +147,7 @@ export class CollectionStackingView extends CollectionSubView(doc => doc) {
     }
 
     @action
-    moveDocument = (doc: Doc, targetCollection: Doc, addDocument: (document: Doc) => boolean): boolean => {
+    moveDocument = (doc: Doc, targetCollection: Doc | undefined, addDocument: (document: Doc) => boolean): boolean => {
         return this.props.removeDocument(doc) && addDocument(doc);
     }
     createRef = (ele: HTMLDivElement | null) => {
@@ -243,7 +243,7 @@ export class CollectionStackingView extends CollectionSubView(doc => doc) {
         const where = [de.x, de.y];
         let targInd = -1;
         let plusOne = false;
-        if (de.data instanceof DragManager.DocumentDragData) {
+        if (de.complete.docDragData) {
             this._docXfs.map((cd, i) => {
                 const pos = cd.dxf().inverse().transformPoint(-2 * this.gridGap, -2 * this.gridGap);
                 const pos1 = cd.dxf().inverse().transformPoint(cd.width(), cd.height());
@@ -252,16 +252,16 @@ export class CollectionStackingView extends CollectionSubView(doc => doc) {
                     plusOne = (where[1] > (pos[1] + pos1[1]) / 2 ? 1 : 0) ? true : false;
                 }
             });
-        }
-        if (super.drop(e, de)) {
-            const newDoc = de.data.droppedDocuments[0];
-            const docs = this.childDocList;
-            if (docs) {
-                if (targInd === -1) targInd = docs.length;
-                else targInd = docs.indexOf(this.filteredChildren[targInd]);
-                const srcInd = docs.indexOf(newDoc);
-                docs.splice(srcInd, 1);
-                docs.splice((targInd > srcInd ? targInd - 1 : targInd) + (plusOne ? 1 : 0), 0, newDoc);
+            if (super.drop(e, de)) {
+                const newDoc = de.complete.docDragData.droppedDocuments[0];
+                const docs = this.childDocList;
+                if (docs) {
+                    if (targInd === -1) targInd = docs.length;
+                    else targInd = docs.indexOf(this.filteredChildren[targInd]);
+                    const srcInd = docs.indexOf(newDoc);
+                    docs.splice(srcInd, 1);
+                    docs.splice((targInd > srcInd ? targInd - 1 : targInd) + (plusOne ? 1 : 0), 0, newDoc);
+                }
             }
         }
         return false;
diff --git a/src/client/views/collections/CollectionStackingViewFieldColumn.tsx b/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
index ca3b93bf8..39b4e4e1d 100644
--- a/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
+++ b/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
@@ -51,21 +51,21 @@ export class CollectionStackingViewFieldColumn extends React.Component<CSVFieldC
         this._dropRef = ele;
         this.dropDisposer && this.dropDisposer();
         if (ele) {
-            this.dropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.columnDrop.bind(this) } });
+            this.dropDisposer = DragManager.MakeDropTarget(ele, this.columnDrop.bind(this));
         }
     }
 
     @undoBatch
     columnDrop = action((e: Event, de: DragManager.DropEvent) => {
         this._createAliasSelected = false;
-        if (de.data instanceof DragManager.DocumentDragData) {
+        if (de.complete.docDragData) {
             const key = StrCast(this.props.parent.props.Document.sectionFilter);
             const castedValue = this.getValue(this._heading);
             if (castedValue) {
-                de.data.droppedDocuments.forEach(d => d[key] = castedValue);
+                de.complete.docDragData.droppedDocuments.forEach(d => d[key] = castedValue);
             }
             else {
-                de.data.droppedDocuments.forEach(d => d[key] = undefined);
+                de.complete.docDragData.droppedDocuments.forEach(d => d[key] = undefined);
             }
             this.props.parent.drop(e, de);
             e.stopPropagation();
diff --git a/src/client/views/collections/CollectionSubView.tsx b/src/client/views/collections/CollectionSubView.tsx
index 9fa244546..5c7794cc0 100644
--- a/src/client/views/collections/CollectionSubView.tsx
+++ b/src/client/views/collections/CollectionSubView.tsx
@@ -27,7 +27,7 @@ import { Networking } from "../../Network";
 export interface CollectionViewProps extends FieldViewProps {
     addDocument: (document: Doc) => boolean;
     removeDocument: (document: Doc) => boolean;
-    moveDocument: (document: Doc, targetCollection: Doc, addDocument: (document: Doc) => boolean) => boolean;
+    moveDocument: (document: Doc, targetCollection: Doc | undefined, addDocument: (document: Doc) => boolean) => boolean;
     PanelWidth: () => number;
     PanelHeight: () => number;
     VisibleHeight?: () => number;
@@ -51,7 +51,7 @@ export function CollectionSubView<T>(schemaCtor: (doc: Doc) => T) {
         protected createDropTarget = (ele: HTMLDivElement) => { //used for stacking and masonry view
             this.dropDisposer && this.dropDisposer();
             if (ele) {
-                this.dropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.drop.bind(this) } });
+                this.dropDisposer = DragManager.MakeDropTarget(ele, this.drop.bind(this));
             }
         }
         protected CreateDropTarget(ele: HTMLDivElement) { //used in schema view
@@ -132,32 +132,33 @@ export function CollectionSubView<T>(schemaCtor: (doc: Doc) => T) {
         @undoBatch
         @action
         protected drop(e: Event, de: DragManager.DropEvent): boolean {
+            const docDragData = de.complete.docDragData;
             (this.props.Document.dropConverter instanceof ScriptField) &&
-                this.props.Document.dropConverter.script.run({ dragData: de.data });
-            if (de.data instanceof DragManager.DocumentDragData && !de.data.applyAsTemplate) {
-                if (de.mods === "AltKey" && de.data.draggedDocuments.length) {
+                this.props.Document.dropConverter.script.run({ dragData: docDragData }); /// bcz: check this 
+            if (docDragData && !docDragData.applyAsTemplate) {
+                if (de.altKey && docDragData.draggedDocuments.length) {
                     this.childDocs.map(doc =>
-                        Doc.ApplyTemplateTo(de.data.draggedDocuments[0], doc, "layoutFromParent"));
+                        Doc.ApplyTemplateTo(docDragData.draggedDocuments[0], doc, "layoutFromParent"));
                     e.stopPropagation();
                     return true;
                 }
                 let added = false;
-                if (de.data.dropAction || de.data.userDropAction) {
-                    added = de.data.droppedDocuments.reduce((added: boolean, d) => this.props.addDocument(d) || added, false);
-                } else if (de.data.moveDocument) {
-                    const movedDocs = de.data.draggedDocuments;
+                if (docDragData.dropAction || docDragData.userDropAction) {
+                    added = docDragData.droppedDocuments.reduce((added: boolean, d) => this.props.addDocument(d) || added, false);
+                } else if (docDragData.moveDocument) {
+                    const movedDocs = docDragData.draggedDocuments;
                     added = movedDocs.reduce((added: boolean, d, i) =>
-                        de.data.droppedDocuments[i] !== d ? this.props.addDocument(de.data.droppedDocuments[i]) :
-                            de.data.moveDocument(d, this.props.Document, this.props.addDocument) || added, false);
+                        docDragData.droppedDocuments[i] !== d ? this.props.addDocument(docDragData.droppedDocuments[i]) :
+                            docDragData.moveDocument?.(d, this.props.Document, this.props.addDocument) || added, false);
                 } else {
-                    added = de.data.droppedDocuments.reduce((added: boolean, d) => this.props.addDocument(d) || added, false);
+                    added = docDragData.droppedDocuments.reduce((added: boolean, d) => this.props.addDocument(d) || added, false);
                 }
                 e.stopPropagation();
                 return added;
             }
-            else if (de.data instanceof DragManager.AnnotationDragData) {
+            else if (de.complete.annoDragData) {
                 e.stopPropagation();
-                return this.props.addDocument(de.data.dropDocument);
+                return this.props.addDocument(de.complete.annoDragData.dropDocument);
             }
             return false;
         }
diff --git a/src/client/views/collections/CollectionTreeView.tsx b/src/client/views/collections/CollectionTreeView.tsx
index ec1e7409f..0a22a897c 100644
--- a/src/client/views/collections/CollectionTreeView.tsx
+++ b/src/client/views/collections/CollectionTreeView.tsx
@@ -123,7 +123,7 @@ class TreeView extends React.Component<TreeViewProps> {
     @undoBatch delete = () => this.props.deleteDoc(this.props.document);
     @undoBatch openRight = () => this.props.addDocTab(this.props.document, this.templateDataDoc, "onRight", this.props.libraryPath);
     @undoBatch indent = () => this.props.addDocument(this.props.document) && this.delete();
-    @undoBatch move = (doc: Doc, target: Doc, addDoc: (doc: Doc) => boolean) => {
+    @undoBatch move = (doc: Doc, target: Doc | undefined, addDoc: (doc: Doc) => boolean) => {
         return this.props.document !== target && this.props.deleteDoc(doc) && addDoc(doc);
     }
     @undoBatch @action remove = (document: Document, key: string) => {
@@ -132,7 +132,7 @@ class TreeView extends React.Component<TreeViewProps> {
 
     protected createTreeDropTarget = (ele: HTMLDivElement) => {
         this._treedropDisposer && this._treedropDisposer();
-        ele && (this._treedropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.treeDrop.bind(this) } }));
+        ele && (this._treedropDisposer = DragManager.MakeDropTarget(ele, this.treeDrop.bind(this)));
     }
 
     onPointerDown = (e: React.PointerEvent) => e.stopPropagation();
@@ -220,25 +220,25 @@ class TreeView extends React.Component<TreeViewProps> {
         const rect = this._header!.current!.getBoundingClientRect();
         const before = pt[1] < rect.top + rect.height / 2;
         const inside = pt[0] > Math.min(rect.left + 75, rect.left + rect.width * .75) || (!before && this.treeViewOpen && DocListCast(this.dataDoc[this.fieldKey]).length);
-        if (de.data instanceof DragManager.LinkDragData) {
-            const sourceDoc = de.data.linkSourceDocument;
+        if (de.complete.linkDragData) {
+            const sourceDoc = de.complete.linkDragData.linkSourceDocument;
             const destDoc = this.props.document;
             DocUtils.MakeLink({ doc: sourceDoc }, { doc: destDoc });
             e.stopPropagation();
         }
-        if (de.data instanceof DragManager.DocumentDragData) {
+        if (de.complete.docDragData) {
             e.stopPropagation();
-            if (de.data.draggedDocuments[0] === this.props.document) return true;
+            if (de.complete.docDragData.draggedDocuments[0] === this.props.document) return true;
             let addDoc = (doc: Doc) => this.props.addDocument(doc, undefined, before);
             if (inside) {
                 addDoc = (doc: Doc) => Doc.AddDocToList(this.dataDoc, this.fieldKey, doc) || addDoc(doc);
             }
-            const movedDocs = (de.data.options === this.props.treeViewId ? de.data.draggedDocuments : de.data.droppedDocuments);
-            return ((de.data.dropAction && (de.data.options !== this.props.treeViewId)) || de.data.userDropAction) ?
-                de.data.droppedDocuments.reduce((added, d) => addDoc(d) || added, false)
-                : de.data.moveDocument ?
-                    movedDocs.reduce((added, d) => de.data.moveDocument(d, undefined, addDoc) || added, false)
-                    : de.data.droppedDocuments.reduce((added, d) => addDoc(d), false);
+            const movedDocs = (de.complete.docDragData.treeViewId === this.props.treeViewId ? de.complete.docDragData.draggedDocuments : de.complete.docDragData.droppedDocuments);
+            return ((de.complete.docDragData.dropAction && (de.complete.docDragData.treeViewId !== this.props.treeViewId)) || de.complete.docDragData.userDropAction) ?
+                de.complete.docDragData.droppedDocuments.reduce((added, d) => addDoc(d) || added, false)
+                : de.complete.docDragData.moveDocument ?
+                    movedDocs.reduce((added, d) => de.complete.docDragData?.moveDocument?.(d, undefined, addDoc) || added, false)
+                    : de.complete.docDragData.droppedDocuments.reduce((added, d) => addDoc(d), false);
         }
         return false;
     }
@@ -571,7 +571,7 @@ export class CollectionTreeView extends CollectionSubView(Document) {
     protected createTreeDropTarget = (ele: HTMLDivElement) => {
         this.treedropDisposer && this.treedropDisposer();
         if (this._mainEle = ele) {
-            this.treedropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.drop.bind(this) } });
+            this.treedropDisposer = DragManager.MakeDropTarget(ele, this.drop.bind(this));
         }
     }
 
@@ -624,7 +624,7 @@ export class CollectionTreeView extends CollectionSubView(Document) {
     render() {
         const dropAction = StrCast(this.props.Document.dropAction) as dropActionType;
         const addDoc = (doc: Doc, relativeTo?: Doc, before?: boolean) => Doc.AddDocToList(this.props.Document, this.props.fieldKey, doc, relativeTo, before, false, false, false);
-        const moveDoc = (d: Doc, target: Doc, addDoc: (doc: Doc) => boolean) => this.props.moveDocument(d, target, addDoc);
+        const moveDoc = (d: Doc, target: Doc | undefined, addDoc: (doc: Doc) => boolean) => this.props.moveDocument(d, target, addDoc);
         return !this.childDocs ? (null) : (
             <div className="collectionTreeView-dropTarget" id="body"
                 style={{ background: StrCast(this.props.Document.backgroundColor, "lightgray"), paddingTop: `${NumCast(this.props.Document.yMargin, 20)}px` }}
diff --git a/src/client/views/collections/CollectionView.tsx b/src/client/views/collections/CollectionView.tsx
index 15eec37de..9bd07966c 100644
--- a/src/client/views/collections/CollectionView.tsx
+++ b/src/client/views/collections/CollectionView.tsx
@@ -68,7 +68,7 @@ export namespace CollectionViewType {
 export interface CollectionRenderProps {
     addDocument: (document: Doc) => boolean;
     removeDocument: (document: Doc) => boolean;
-    moveDocument: (document: Doc, targetCollection: Doc, addDocument: (document: Doc) => boolean) => boolean;
+    moveDocument: (document: Doc, targetCollection: Doc | undefined, addDocument: (document: Doc) => boolean) => boolean;
     active: () => boolean;
     whenActiveChanged: (isActive: boolean) => void;
 }
@@ -150,7 +150,7 @@ export class CollectionView extends Touchable<FieldViewProps> {
     // otherwise, the document being moved must be able to be removed from its container before
     // moving it into the target.  
     @action.bound
-    moveDocument(doc: Doc, targetCollection: Doc, addDocument: (doc: Doc) => boolean): boolean {
+    moveDocument(doc: Doc, targetCollection: Doc | undefined, addDocument: (doc: Doc) => boolean): boolean {
         if (Doc.AreProtosEqual(this.props.Document, targetCollection)) {
             return true;
         }
diff --git a/src/client/views/collections/CollectionViewChromes.tsx b/src/client/views/collections/CollectionViewChromes.tsx
index 4161e5d6e..a870b6043 100644
--- a/src/client/views/collections/CollectionViewChromes.tsx
+++ b/src/client/views/collections/CollectionViewChromes.tsx
@@ -288,15 +288,15 @@ export class CollectionViewBaseChrome extends React.Component<CollectionViewChro
     protected createDropTarget = (ele: HTMLDivElement) => {
         this.dropDisposer && this.dropDisposer();
         if (ele) {
-            this.dropDisposer = DragManager.MakeDropTarget(ele, { handlers: { drop: this.drop.bind(this) } });
+            this.dropDisposer = DragManager.MakeDropTarget(ele, this.drop.bind(this));
         }
     }
 
     @undoBatch
     @action
     protected drop(e: Event, de: DragManager.DropEvent): boolean {
-        if (de.data instanceof DragManager.DocumentDragData && de.data.draggedDocuments.length) {
-            this._buttonizableCommands.filter(c => c.title === this._currentKey).map(c => c.immediate(de.data.draggedDocuments));
+        if (de.complete.docDragData && de.complete.docDragData.draggedDocuments.length) {
+            this._buttonizableCommands.filter(c => c.title === this._currentKey).map(c => c.immediate(de.complete.docDragData?.draggedDocuments || []));
             e.stopPropagation();
         }
         return true;
diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
index ddfb52ba9..89c1df598 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
@@ -139,15 +139,15 @@ export class CollectionFreeFormView extends CollectionSubView(PanZoomDocument) {
         const [xp, yp] = xf.transformPoint(de.x, de.y);
         const [xpo, ypo] = xfo.transformPoint(de.x, de.y);
         if (super.drop(e, de)) {
-            if (de.data instanceof DragManager.DocumentDragData) {
-                if (de.data.droppedDocuments.length) {
-                    const firstDoc = de.data.droppedDocuments[0];
+            if (de.complete.docDragData) {
+                if (de.complete.docDragData.droppedDocuments.length) {
+                    const firstDoc = de.complete.docDragData.droppedDocuments[0];
                     const z = NumCast(firstDoc.z);
-                    const x = (z ? xpo : xp) - de.data.offset[0];
-                    const y = (z ? ypo : yp) - de.data.offset[1];
+                    const x = (z ? xpo : xp) - de.complete.docDragData.offset[0];
+                    const y = (z ? ypo : yp) - de.complete.docDragData.offset[1];
                     const dropX = NumCast(firstDoc.x);
                     const dropY = NumCast(firstDoc.y);
-                    de.data.droppedDocuments.forEach(action((d: Doc) => {
+                    de.complete.docDragData.droppedDocuments.forEach(action((d: Doc) => {
                         const layoutDoc = Doc.Layout(d);
                         d.x = x + NumCast(d.x) - dropX;
                         d.y = y + NumCast(d.y) - dropY;
@@ -162,19 +162,19 @@ export class CollectionFreeFormView extends CollectionSubView(PanZoomDocument) {
                         this.bringToFront(d);
                     }));
 
-                    de.data.droppedDocuments.length === 1 && this.updateCluster(de.data.droppedDocuments[0]);
+                    de.complete.docDragData.droppedDocuments.length === 1 && this.updateCluster(de.complete.docDragData.droppedDocuments[0]);
                 }
             }
-            else if (de.data instanceof DragManager.AnnotationDragData) {
-                if (de.data.dropDocument) {
-                    const dragDoc = de.data.dropDocument;
-                    const x = xp - de.data.offset[0];
-                    const y = yp - de.data.offset[1];
+            else if (de.complete.annoDragData) {
+                if (de.complete.annoDragData.dropDocument) {
+                    const dragDoc = de.complete.annoDragData.dropDocument;
+                    const x = xp - de.complete.annoDragData.offset[0];
+                    const y = yp - de.complete.annoDragData.offset[1];
                     const dropX = NumCast(dragDoc.x);
                     const dropY = NumCast(dragDoc.y);
                     dragDoc.x = x + NumCast(dragDoc.x) - dropX;
                     dragDoc.y = y + NumCast(dragDoc.y) - dropY;
-                    de.data.targetContext = this.props.Document; // dropped a PDF annotation, so we need to set the targetContext on the dragData which the PDF view uses at the end of the drop operation
+                    de.complete.annoDragData.targetContext = this.props.Document; // dropped a PDF annotation, so we need to set the targetContext on the dragData which the PDF view uses at the end of the drop operation
                     this.bringToFront(dragDoc);
                 }
             }
@@ -205,10 +205,7 @@ export class CollectionFreeFormView extends CollectionSubView(PanZoomDocument) {
                 const [left, top] = clusterDocs[0].props.ScreenToLocalTransform().scale(clusterDocs[0].props.ContentScaling()).inverse().transformPoint(0, 0);
                 de.offset = this.getTransform().transformDirection(ptsParent.clientX - left, ptsParent.clientY - top);
                 de.dropAction = e.ctrlKey || e.altKey ? "alias" : undefined;
-                DragManager.StartDocumentDrag(clusterDocs.map(v => v.ContentDiv!), de, ptsParent.clientX, ptsParent.clientY, {
-                    handlers: { dragComplete: action(emptyFunction) },
-                    hideSource: !de.dropAction
-                });
+                DragManager.StartDocumentDrag(clusterDocs.map(v => v.ContentDiv!), de, ptsParent.clientX, ptsParent.clientY, { hideSource: !de.dropAction });
                 return true;
             }
         }
@@ -896,7 +893,7 @@ export class CollectionFreeFormView extends CollectionSubView(PanZoomDocument) {
         // otherwise, they are stored in fieldKey.  All annotations to this document are stored in the extension document
         return !this.extensionDoc ? (null) :
             <div className={"collectionfreeformview-container"} ref={this.createDropTarget} onWheel={this.onPointerWheel}//pointerEvents: SelectionManager.GetIsDragging() ? "all" : undefined,
-                style={{ height: this.isAnnotationOverlay ? (this.props.Document.scrollHeight ? this.Document.scrollHeight : "100%") : this.props.PanelHeight() }}
+                style={{ pointerEvents: SelectionManager.GetIsDragging() ? "all" : undefined, height: this.isAnnotationOverlay ? (this.props.Document.scrollHeight ? this.Document.scrollHeight : "100%") : this.props.PanelHeight() }}
                 onPointerDown={this.onPointerDown} onPointerMove={this.onCursorMove} onDrop={this.onDrop.bind(this)} onContextMenu={this.onContextMenu} onTouchStart={this.onTouchStart}>
                 <MarqueeView {...this.props} extensionDoc={this.extensionDoc} activeDocuments={this.getActiveDocuments} selectDocuments={this.selectDocuments} addDocument={this.addDocument}
                     addLiveTextDocument={this.addLiveTextBox} getContainerTransform={this.getContainerTransform} getTransform={this.getTransform} isAnnotationOverlay={this.isAnnotationOverlay}>