3 files changed, 22 insertions, 8 deletions
diff --git a/src/new_fields/Doc.ts b/src/new_fields/Doc.ts
index 17c1b7e16..b8f11c8c8 100644
--- a/src/new_fields/Doc.ts
+++ b/src/new_fields/Doc.ts
@@ -1,4 +1,4 @@
-import { observable, ObservableMap, runInAction, action } from "mobx";
+import { observable, ObservableMap, runInAction, action, untracked } from "mobx";
 import { alias, map, serializable } from "serializr";
 import { DocServer } from "../client/DocServer";
 import { DocumentType } from "../client/documents/DocumentTypes";
@@ -467,9 +467,14 @@ export namespace Doc {
     // to store annotations, ink, and other data.
     //
     export function fieldExtensionDoc(doc: Doc, fieldKey: string) {
-        const extension = doc[fieldKey + "_ext"] as Doc;
-        (extension === undefined) && setTimeout(() => CreateDocumentExtensionForField(doc, fieldKey), 0);
-        return extension ? extension : undefined;
+        const extension = doc[fieldKey + "_ext"];
+        if (extension === undefined) {
+            setTimeout(() => CreateDocumentExtensionForField(doc, fieldKey), 0);
+        }
+        return extension ? extension as Doc : undefined;
+    }
+    export function fieldExtensionDocSync(doc: Doc, fieldKey: string) {
+        return (doc[fieldKey + "_ext"] as Doc) || CreateDocumentExtensionForField(doc, fieldKey);
     }
 
     export function CreateDocumentExtensionForField(doc: Doc, fieldKey: string) {
@@ -682,7 +687,9 @@ export namespace Doc {
     }
 
 
+    export function LinkOtherAnchor(linkDoc: Doc, anchorDoc: Doc) { return Doc.AreProtosEqual(anchorDoc, Cast(linkDoc.anchor1, Doc) as Doc) ? Cast(linkDoc.anchor2, Doc) as Doc : Cast(linkDoc.anchor1, Doc) as Doc; }
     export function LinkEndpoint(linkDoc: Doc, anchorDoc: Doc) { return Doc.AreProtosEqual(anchorDoc, Cast(linkDoc.anchor1, Doc) as Doc) ? "layoutKey1" : "layoutKey2"; }
+
     export function linkFollowUnhighlight() {
         Doc.UnhighlightAll();
         document.removeEventListener("pointerdown", linkFollowUnhighlight);
@@ -748,4 +755,8 @@ Scripting.addGlobal(function aliasDocs(field: any) { return new List<Doc>(field.
 Scripting.addGlobal(function docList(field: any) { return DocListCast(field); });
 Scripting.addGlobal(function sameDocs(doc1: any, doc2: any) { return Doc.AreProtosEqual(doc1, doc2); });
 Scripting.addGlobal(function undo() { return UndoManager.Undo(); });
-Scripting.addGlobal(function redo() { return UndoManager.Redo(); });
-\ No newline at end of file
+Scripting.addGlobal(function redo() { return UndoManager.Redo(); });
+Scripting.addGlobal(function selectedDocs(container: Doc, excludeCollections: boolean, prevValue: any) {
+    const docs = DocListCast(Doc.UserDoc().SelectedDocs).filter(d => !Doc.AreProtosEqual(d, container) && (!excludeCollections || !Cast(d.data, listSpec(Doc), null)) && d.type !== DocumentType.KVP);
+    return docs.length ? new List(docs) : prevValue;
+});
+\ No newline at end of file
diff --git a/src/new_fields/ScriptField.ts b/src/new_fields/ScriptField.ts
index 6b2723663..b5ad4a7f6 100644
--- a/src/new_fields/ScriptField.ts
+++ b/src/new_fields/ScriptField.ts
@@ -103,7 +103,7 @@ export class ScriptField extends ObjectField {
     }
     public static CompileScript(script: string, params: object = {}, addReturn = false) {
         const compiled = CompileScript(script, {
-            params: { this: Doc.name, ...params },
+            params: { this: Doc.name, _last_: "any", ...params },
             typecheck: false,
             editable: true,
             addReturn: addReturn
@@ -124,8 +124,9 @@ export class ScriptField extends ObjectField {
 @scriptingGlobal
 @Deserializable("computed", deserializeScript)
 export class ComputedField extends ScriptField {
+    _lastComputedResult: any;
     //TODO maybe add an observable cache based on what is passed in for doc, considering there shouldn't really be that many possible values for doc
-    value = computedFn((doc: Doc) => this.script.run({ this: doc }, console.log).result);
+    value = computedFn((doc: Doc) => this._lastComputedResult = this.script.run({ this: doc, _last_: this._lastComputedResult }, console.log).result);
     public static MakeScript(script: string, params: object = {}, ) {
         const compiled = ScriptField.CompileScript(script, params, false);
         return compiled.compiled ? new ComputedField(compiled) : undefined;
diff --git a/src/new_fields/documentSchemas.ts b/src/new_fields/documentSchemas.ts
index 5c2ba6111..21e69fbed 100644
--- a/src/new_fields/documentSchemas.ts
+++ b/src/new_fields/documentSchemas.ts
@@ -48,7 +48,9 @@ export const documentSchema = createSchema({
     animateToDimensions: listSpec("number"), // layout information about the target rectangle a document is animating towards 
     scrollToLinkID: "string",   // id of link being traversed. allows this doc to scroll/highlight/etc its link anchor. scrollToLinkID should be set to undefined by this doc after it sets up its scroll,etc.
     strokeWidth: "number",
-    fontSize: "string"
+    fontSize: "string",
+    LODarea: "number",          // area (width*height) where CollectionFreeFormViews switch from a label to rendering contents
+    LODdisable: "boolean",      // whether to disbale LOD switching for CollectionFreeFormViews
 });
 
 export const positionSchema = createSchema({