1 files changed, 21 insertions, 2 deletions
diff --git a/src/new_fields/Doc.ts b/src/new_fields/Doc.ts
index 1b0ff812f..cce4fff5d 100644
--- a/src/new_fields/Doc.ts
+++ b/src/new_fields/Doc.ts
@@ -2,7 +2,7 @@ import { observable, action } from "mobx";
 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 } from "./util";
+import { setter, getter, getField, updateFunction, deleteProperty, makeEditable, makeReadOnly } from "./util";
 import { Cast, ToConstructor, PromiseValue, FieldValue, NumCast } from "./Types";
 import { listSpec } from "./Schema";
 import { ObjectField } from "./ObjectField";
@@ -156,6 +156,15 @@ export namespace Doc {
     //         return Cast(field, ctor);
     //     });
     // }
+    export function MakeReadOnly(): { end(): void } {
+        makeReadOnly();
+        return {
+            end() {
+                makeEditable();
+            }
+        };
+    }
+
     export function Get(doc: Doc, key: string, ignoreProto: boolean = false): FieldResult {
         const self = doc[Self];
         return getField(self, key, ignoreProto);
@@ -207,7 +216,7 @@ export namespace Doc {
 
     // gets the document's prototype or returns the document if it is a prototype
     export function GetProto(doc: Doc) {
-        return Doc.GetT(doc, "isPrototype", "boolean", true) ? doc : doc.proto!;
+        return Doc.GetT(doc, "isPrototype", "boolean", true) ? doc : (doc.proto || doc);
     }
 
     export function allKeys(doc: Doc): string[] {
@@ -222,6 +231,16 @@ export namespace Doc {
         return Array.from(results);
     }
 
+    export function AddDocToList(target: Doc, key: string, doc: Doc, relativeTo?: Doc, before?: boolean) {
+        let list = Cast(target[key], listSpec(Doc));
+        if (list) {
+            let ind = relativeTo ? list.indexOf(relativeTo) : -1;
+            if (ind === -1) list.push(doc);
+            else list.splice(before ? ind : ind + 1, 0, doc);
+        }
+        return true;
+    }
+
     export function MakeAlias(doc: Doc) {
         if (!GetT(doc, "isPrototype", "boolean", true)) {
             return Doc.MakeCopy(doc);