3 files changed, 36 insertions, 2 deletions

diff --git a/src/new_fields/Doc.ts b/src/new_fields/Doc.ts
index 0fe3f76e3..c9937af87 100644
--- a/src/new_fields/Doc.ts
+++ b/src/new_fields/Doc.ts
@@ -3,7 +3,7 @@ import { serializable, primitive, map, alias, list } from "serializr";
 import { autoObject, SerializationHelper, Deserializable } from "../client/util/SerializationHelper";
 import { DocServer } from "../client/DocServer";
 import { setter, getter, getField, updateFunction, deleteProperty, makeEditable, makeReadOnly } from "./util";
-import { Cast, ToConstructor, PromiseValue, FieldValue, NumCast } from "./Types";
+import { Cast, ToConstructor, PromiseValue, FieldValue, NumCast, BoolCast, StrCast } from "./Types";
 import { listSpec } from "./Schema";
 import { ObjectField } from "./ObjectField";
 import { RefField, FieldId } from "./RefField";
@@ -332,10 +332,11 @@ export namespace Doc {
         if (expandedTemplateLayout instanceof Doc) {
             return expandedTemplateLayout;
         }
-        if (expandedTemplateLayout === undefined) {
+        if (expandedTemplateLayout === undefined && BoolCast(templateLayoutDoc.isTemplate)) {
             setTimeout(() => {
                 templateLayoutDoc["_expanded_" + dataDoc[Id]] = Doc.MakeDelegate(templateLayoutDoc);
                 (templateLayoutDoc["_expanded_" + dataDoc[Id]] as Doc).title = templateLayoutDoc.title + " applied to " + dataDoc.title;
+                (templateLayoutDoc["_expanded_" + dataDoc[Id]] as Doc).isExpandedTemplate = templateLayoutDoc;
             }, 0);
         }
         return templateLayoutDoc;
@@ -373,4 +374,32 @@ export namespace Doc {
         delegate.proto = doc;
         return delegate;
     }
+
+    export function MakeTemplate(fieldTemplate: Doc, metaKey: string, proto: Doc) {
+        // move data doc fields to layout doc as needed (nativeWidth/nativeHeight, data, ??)
+        let backgroundLayout = StrCast(fieldTemplate.backgroundLayout);
+        let fieldLayoutDoc = fieldTemplate;
+        if (fieldTemplate.layout instanceof Doc) {
+            fieldLayoutDoc = Doc.MakeDelegate(fieldTemplate.layout);
+        }
+        let layout = StrCast(fieldLayoutDoc.layout).replace(/fieldKey={"[^"]*"}/, `fieldKey={"${metaKey}"}`);
+        if (backgroundLayout) {
+            layout = StrCast(fieldLayoutDoc.layout).replace(/fieldKey={"annotations"}/, `fieldKey={"${metaKey}"} fieldExt={"annotations"}`);
+            backgroundLayout = backgroundLayout.replace(/fieldKey={"[^"]*"}/, `fieldKey={"${metaKey}"}`);
+        }
+        let nw = Cast(fieldTemplate.nativeWidth, "number");
+        let nh = Cast(fieldTemplate.nativeHeight, "number");
+
+        let layoutDelegate = fieldTemplate.layout instanceof Doc ? fieldLayoutDoc : fieldTemplate;
+        layoutDelegate.layout = layout;
+
+        fieldTemplate.title = metaKey;
+        fieldTemplate.layout = layoutDelegate !== fieldTemplate ? layoutDelegate : layout;
+        fieldTemplate.backgroundLayout = backgroundLayout;
+        fieldTemplate.nativeWidth = nw;
+        fieldTemplate.nativeHeight = nh;
+        fieldTemplate.isTemplate = true;
+        fieldTemplate.showTitle = "title";
+        fieldTemplate.proto = proto;
+    }
 }
\ No newline at end of file
diff --git a/src/new_fields/Types.ts b/src/new_fields/Types.ts
index 39d384d64..f8a4a30b4 100644
--- a/src/new_fields/Types.ts
+++ b/src/new_fields/Types.ts
@@ -1,6 +1,7 @@
 import { Field, Opt, FieldResult, Doc } from "./Doc";
 import { List } from "./List";
 import { RefField } from "./RefField";
+import { DateField } from "./DateField";
 
 export type ToType<T extends InterfaceValue> =
     T extends "string" ? string :
@@ -80,6 +81,9 @@ export function StrCast(field: FieldResult, defaultVal: string | null = "") {
 export function BoolCast(field: FieldResult, defaultVal: boolean | null = null) {
     return Cast(field, "boolean", defaultVal);
 }
+export function DateCast(field: FieldResult) {
+    return Cast(field, DateField, null);
+}
 
 type WithoutList<T extends Field> = T extends List<infer R> ? (R extends RefField ? (R | Promise<R>)[] : R[]) : T;
 
diff --git a/src/new_fields/util.ts b/src/new_fields/util.ts
index b5e50d501..47e467041 100644
--- a/src/new_fields/util.ts
+++ b/src/new_fields/util.ts
@@ -50,6 +50,7 @@ const _setterImpl = action(function (target: any, prop: string | symbol | number
         target.__fields[prop] = value;
     }
     if (value === undefined) target[Update]({ '$unset': { ["fields." + prop]: "" } });
+    if (typeof value === "object" && !(value instanceof ObjectField)) debugger;
     else target[Update]({ '$set': { ["fields." + prop]: value instanceof ObjectField ? SerializationHelper.Serialize(value) : (value === undefined ? null : value) } });
     UndoManager.AddEvent({
         redo: () => receiver[prop] = value,