2 files changed, 14 insertions, 4 deletions
diff --git a/src/client/util/Scripting.ts b/src/client/util/Scripting.ts
index 40e2ad6bb..a59d9f201 100644
--- a/src/client/util/Scripting.ts
+++ b/src/client/util/Scripting.ts
@@ -39,7 +39,6 @@ export interface CompileError {
 }
 
 export type CompileResult = CompiledScript | CompileError;
-
 function Run(script: string | undefined, customParams: string[], diagnostics: any[], originalScript: string, options: ScriptOptions): CompileResult {
     const errors = diagnostics.some(diag => diag.category === ts.DiagnosticCategory.Error);
     if ((options.typecheck !== false && errors) || !script) {
@@ -64,10 +63,20 @@ function Run(script: string | undefined, customParams: string[], diagnostics: an
             }
         }
         let thisParam = args.this || capturedVariables.this;
+        let batch: { end(): void } | undefined = undefined;
         try {
+            if (!options.editable) {
+                batch = Doc.MakeReadOnly();
+            }
             const result = compiledFunction.apply(thisParam, params).apply(thisParam, argsArray);
+            if (batch) {
+                batch.end();
+            }
             return { success: true, result };
         } catch (error) {
+            if (batch) {
+                batch.end();
+            }
             return { success: false, error };
         }
     };
@@ -133,6 +142,7 @@ export interface ScriptOptions {
     params?: { [name: string]: string };
     capturedVariables?: { [name: string]: Field };
     typecheck?: boolean;
+    editable?: boolean;
 }
 
 export function CompileScript(script: string, options: ScriptOptions = {}): CompileResult {
diff --git a/src/client/views/nodes/KeyValueBox.tsx b/src/client/views/nodes/KeyValueBox.tsx
index 3d626eef0..a4c14ae38 100644
--- a/src/client/views/nodes/KeyValueBox.tsx
+++ b/src/client/views/nodes/KeyValueBox.tsx
@@ -38,10 +38,11 @@ export class KeyValueBox extends React.Component<FieldViewProps> {
     }
     public static SetField(doc: Doc, key: string, value: string) {
         let eq = value.startsWith("=");
+        let target = eq ? doc : Doc.GetProto(doc);
         value = eq ? value.substr(1) : value;
         let dubEq = value.startsWith(":=");
         value = dubEq ? value.substr(2) : value;
-        let options: ScriptOptions = { addReturn: true };
+        let options: ScriptOptions = { addReturn: true, params: { this: "Doc" } };
         if (dubEq) options.typecheck = false;
         let script = CompileScript(value, options);
         if (!script.compiled) {
@@ -49,12 +50,11 @@ export class KeyValueBox extends React.Component<FieldViewProps> {
         }
         let field = new ComputedField(script);
         if (!dubEq) {
-            let res = script.run();
+            let res = script.run({ this: target });
             if (!res.success) return false;
             field = res.result;
         }
         if (Field.IsField(field, true)) {
-            let target = eq ? doc : Doc.GetProto(doc);
             target[key] = field;
             return true;
         }