1 files changed, 66 insertions, 0 deletions
diff --git a/devtools/shared/transport/js-window-actor-transport.js b/devtools/shared/transport/js-window-actor-transport.js
new file mode 100644
index 0000000000..9f0fb82497
--- /dev/null
+++ b/devtools/shared/transport/js-window-actor-transport.js
@@ -0,0 +1,66 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * DevTools transport relying on JS Window Actors. This is an experimental
+ * transport. It is only used when using the JS Window Actor based frame
+ * connector. In that case this transport will be used to communicate between
+ * the DevToolsServer living in the parent process and the DevToolsServer
+ * living in the process of the target frame.
+ *
+ * This is intended to be a replacement for child-transport.js which is a
+ * message-manager based transport.
+ */
+class JsWindowActorTransport {
+  constructor(jsWindowActor, prefix) {
+    this.hooks = null;
+    this._jsWindowActor = jsWindowActor;
+    this._prefix = prefix;
+
+    this._onPacketReceived = this._onPacketReceived.bind(this);
+  }
+
+  _addListener() {
+    this._jsWindowActor.on("packet-received", this._onPacketReceived);
+  }
+
+  _removeListener() {
+    this._jsWindowActor.off("packet-received", this._onPacketReceived);
+  }
+
+  ready() {
+    this._addListener();
+  }
+
+  /**
+   * @param {object} options
+   * @param {boolean} options.isModeSwitching
+   *        true when this is called as the result of a change to the devtools.browsertoolbox.scope pref
+   */
+  close(options) {
+    this._removeListener();
+    if (this.hooks.onTransportClosed) {
+      this.hooks.onTransportClosed(null, options);
+    }
+  }
+
+  _onPacketReceived(eventName, { data }) {
+    const { prefix, packet } = data;
+    if (prefix === this._prefix) {
+      this.hooks.onPacket(packet);
+    }
+  }
+
+  send(packet) {
+    this._jsWindowActor.sendPacket(packet, this._prefix);
+  }
+
+  startBulkSend() {
+    throw new Error("startBulkSend not implemented for JsWindowActorTransport");
+  }
+}
+
+exports.JsWindowActorTransport = JsWindowActorTransport;