1 files changed, 10 insertions, 9 deletions
diff --git a/src/client/util/DragManager.ts b/src/client/util/DragManager.ts
index 7259f66e3..2c316ccdf 100644
--- a/src/client/util/DragManager.ts
+++ b/src/client/util/DragManager.ts
@@ -1,6 +1,6 @@
 import { action, runInAction } from "mobx";
 import { Doc, Field } from "../../new_fields/Doc";
-import { Cast, StrCast } from "../../new_fields/Types";
+import { Cast, StrCast, ScriptCast } from "../../new_fields/Types";
 import { URLField } from "../../new_fields/URLField";
 import { emptyFunction } from "../../Utils";
 import { CollectionDockingView } from "../views/collections/CollectionDockingView";
@@ -13,6 +13,7 @@ import { Docs } from "../documents/Documents";
 import { ScriptField } from "../../new_fields/ScriptField";
 import { List } from "../../new_fields/List";
 import { PrefetchProxy } from "../../new_fields/Proxy";
+import { listSpec } from "../../new_fields/Schema";
 
 export type dropActionType = "alias" | "copy" | undefined;
 export function SetupDrag(
@@ -207,7 +208,6 @@ export namespace DragManager {
         }
         draggedDocuments: Doc[];
         droppedDocuments: Doc[];
-        removeDropProperties: string[] = [];
         offset: number[];
         dropAction: dropActionType;
         userDropAction: dropActionType;
@@ -234,17 +234,18 @@ export namespace DragManager {
 
     export let StartDragFunctions: (() => void)[] = [];
 
-    export function StartDocumentDrag(eles: HTMLElement[], dragData: DocumentDragData, downX: number, downY: number, options?: DragOptions) {
+    export async function StartDocumentDrag(eles: HTMLElement[], dragData: DocumentDragData, downX: number, downY: number, options?: DragOptions) {
         runInAction(() => StartDragFunctions.map(func => func()));
+        await dragData.draggedDocuments.map(d => d.dragFactory);
         StartDrag(eles, dragData, downX, downY, options, options && options.finishDrag ? options.finishDrag :
             (dropData: { [id: string]: any }) => {
-                (dropData.droppedDocuments = dragData.userDropAction === "alias" || (!dragData.userDropAction && dragData.dropAction === "alias") ?
-                    dragData.draggedDocuments.map(d => Doc.MakeAlias(d)) :
-                    dragData.userDropAction === "copy" || (!dragData.userDropAction && dragData.dropAction === "copy") ?
-                        dragData.draggedDocuments.map(d => Doc.MakeCopy(d, true)) :
-                        dragData.draggedDocuments
+                (dropData.droppedDocuments =
+                    dragData.draggedDocuments.map(d => ScriptCast(d.onDragStart) ? ScriptCast(d.onDragStart).script.run({ this: d }).result :
+                        dragData.userDropAction === "alias" || (!dragData.userDropAction && dragData.dropAction === "alias") ? Doc.MakeAlias(d) :
+                            dragData.userDropAction === "copy" || (!dragData.userDropAction && dragData.dropAction === "copy") ? Doc.MakeCopy(d, true) : d)
                 );
-                dragData.removeDropProperties.map(prop => dropData.droppedDocuments.map((d: Doc) => d[prop] = undefined));
+                dropData.droppedDocuments.forEach((drop: Doc, i: number) =>
+                    Cast(dragData.draggedDocuments[i].removeDropProperties, listSpec("string"), []).map(prop => drop[prop] = undefined));
             });
     }