JS - Add the basic architecture to be able to execute embedded js

src/scripting_api/initialization.js

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+/* Copyright 2020 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { AForm } from "./aform.js";
+import { App } from "./app.js";
+import { Console } from "./console.js";
+import { Doc } from "./doc.js";
+import { Field } from "./field.js";
+import { ProxyHandler } from "./proxy.js";
+import { Util } from "./util.js";
+
+function initSandbox(data, extra, out) {
+  const proxyHandler = new ProxyHandler(data.dispatchEventName);
+  const { send, crackURL } = extra;
+  const doc = new Doc({ send });
+  const _document = { obj: doc, wrapped: new Proxy(doc, proxyHandler) };
+  const app = new App({
+    send,
+    _document,
+    calculationOrder: data.calculationOrder,
+  });
+  const util = new Util({ crackURL });
+  const aform = new AForm(doc, app, util);
+
+  for (const [name, objs] of Object.entries(data.objects)) {
+    const obj = objs[0];
+    obj.send = send;
+    obj.doc = _document.wrapped;
+    const field = new Field(obj);
+    const wrapped = (doc._fields[name] = new Proxy(field, proxyHandler));
+    app._objects[obj.id] = { obj: field, wrapped };
+  }
+
+  out.global = Object.create(null);
+  out.app = new Proxy(app, proxyHandler);
+  out.console = new Proxy(new Console({ send }), proxyHandler);
+  out.util = new Proxy(util, proxyHandler);
+  for (const name of Object.getOwnPropertyNames(AForm.prototype)) {
+    if (name.startsWith("AF")) {
+      out[name] = aform[name].bind(aform);
+    }
+  }
+}
+
+export { initSandbox };