2 files changed, 39 insertions, 4 deletions
diff --git a/src/client/views/linking/LinkMenuGroup.tsx b/src/client/views/linking/LinkMenuGroup.tsx
index 928413a11..c97e1062d 100644
--- a/src/client/views/linking/LinkMenuGroup.tsx
+++ b/src/client/views/linking/LinkMenuGroup.tsx
@@ -9,7 +9,7 @@ import { DragManager, SetupDrag } from "../../util/DragManager";
 import { LinkManager } from "../../util/LinkManager";
 import { DocumentView } from "../nodes/DocumentView";
 import './LinkMenu.scss';
-import { LinkMenuItem } from "./LinkMenuItem";
+import { LinkMenuItem, StartLinkTargetsDrag } from "./LinkMenuItem";
 import React = require("react");
 
 interface LinkMenuGroupProps {
@@ -47,7 +47,7 @@ export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
             document.removeEventListener("pointerup", this.onLinkButtonUp);
 
             const targets = this.props.group.map(l => LinkManager.Instance.getOppositeAnchor(l, this.props.sourceDoc)).filter(d => d) as Doc[];
-            DragManager.StartLinkTargetsDrag(this._drag.current, this.props.docView, e.x, e.y, this.props.sourceDoc, targets);
+            StartLinkTargetsDrag(this._drag.current, this.props.docView, e.x, e.y, this.props.sourceDoc, targets);
         }
         e.stopPropagation();
     }
diff --git a/src/client/views/linking/LinkMenuItem.tsx b/src/client/views/linking/LinkMenuItem.tsx
index d091e06ef..d4e58fa8e 100644
--- a/src/client/views/linking/LinkMenuItem.tsx
+++ b/src/client/views/linking/LinkMenuItem.tsx
@@ -3,7 +3,7 @@ import { faArrowRight, faChevronDown, faChevronUp, faEdit, faEye, faTimes } from
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { action, observable } from 'mobx';
 import { observer } from "mobx-react";
-import { Doc } from '../../../new_fields/Doc';
+import { Doc, DocListCast } from '../../../new_fields/Doc';
 import { Cast, StrCast } from '../../../new_fields/Types';
 import { DragManager } from '../../util/DragManager';
 import { LinkManager } from '../../util/LinkManager';
@@ -26,6 +26,41 @@ interface LinkMenuItemProps {
     addDocTab: (document: Doc, where: string) => boolean;
 }
 
+// drag links and drop link targets (aliasing them if needed)
+export async function StartLinkTargetsDrag(dragEle: HTMLElement, docView: DocumentView, downX: number, downY: number, sourceDoc: Doc, specificLinks?: Doc[]) {
+    const draggedDocs = (specificLinks ? specificLinks : DocListCast(sourceDoc.links)).map(link => LinkManager.Instance.getOppositeAnchor(link, sourceDoc)).filter(l => l) as Doc[];
+
+    if (draggedDocs.length) {
+        const moddrag: Doc[] = [];
+        for (const draggedDoc of draggedDocs) {
+            const doc = await Cast(draggedDoc.annotationOn, Doc);
+            if (doc) moddrag.push(doc);
+        }
+
+        const dragData = new DragManager.DocumentDragData(moddrag.length ? moddrag : draggedDocs);
+        dragData.moveDocument = (doc: Doc, targetCollection: Doc | undefined, addDocument: (doc: Doc) => boolean): boolean => {
+            docView.props.removeDocument?.(doc);
+            addDocument(doc);
+            return true;
+        };
+        const containingView = docView.props.ContainingCollectionView;
+        const finishDrag = (e: DragManager.DragCompleteEvent) =>
+            e.docDragData && (e.docDragData.droppedDocuments =
+                dragData.draggedDocuments.reduce((droppedDocs, d) => {
+                    const dvs = DocumentManager.Instance.getDocumentViews(d).filter(dv => dv.props.ContainingCollectionView === containingView);
+                    if (dvs.length) {
+                        dvs.forEach(dv => droppedDocs.push(dv.props.Document));
+                    } else {
+                        droppedDocs.push(Doc.MakeAlias(d));
+                    }
+                    return droppedDocs;
+                }, [] as Doc[]));
+
+        DragManager.StartDrag([dragEle], dragData, downX, downY, undefined, finishDrag);
+    }
+}
+
+
 @observer
 export class LinkMenuItem extends React.Component<LinkMenuItemProps> {
     private _drag = React.createRef<HTMLDivElement>();
@@ -83,7 +118,7 @@ export class LinkMenuItem extends React.Component<LinkMenuItemProps> {
             document.removeEventListener("pointerup", this.onLinkButtonUp);
 
             this._eleClone.style.transform = `translate(${e.x}px, ${e.y}px)`;
-            DragManager.StartLinkTargetsDrag(this._eleClone, this.props.docView, e.x, e.y, this.props.sourceDoc, [this.props.linkDoc]);
+            StartLinkTargetsDrag(this._eleClone, this.props.docView, e.x, e.y, this.props.sourceDoc, [this.props.linkDoc]);
         }
         e.stopPropagation();
     }