1 files changed, 51 insertions, 0 deletions
diff --git a/devtools/server/connectors/js-process-actor/target-watchers/service_worker.sys.mjs b/devtools/server/connectors/js-process-actor/target-watchers/service_worker.sys.mjs
new file mode 100644
index 0000000000..f2f307f297
--- /dev/null
+++ b/devtools/server/connectors/js-process-actor/target-watchers/service_worker.sys.mjs
@@ -0,0 +1,51 @@
+/* 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/. */
+
+import { WorkerTargetWatcherClass } from "resource://devtools/server/connectors/js-process-actor/target-watchers/worker.sys.mjs";
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+XPCOMUtils.defineLazyServiceGetter(
+  lazy,
+  "wdm",
+  "@mozilla.org/dom/workers/workerdebuggermanager;1",
+  "nsIWorkerDebuggerManager"
+);
+
+class ServiceWorkerTargetWatcherClass extends WorkerTargetWatcherClass {
+  constructor() {
+    super("service_worker");
+  }
+
+  /**
+   * Called whenever the debugged browser element navigates to a new page
+   * and the URL's host changes.
+   * This is used to maintain the list of active Service Worker targets
+   * based on that host name.
+   *
+   * @param {Object} watcherDataObject
+   *        See ContentProcessWatcherRegistry
+   */
+  async updateBrowserElementHost(watcherDataObject) {
+    const { sessionData } = watcherDataObject;
+
+    // Create target actor matching this new host.
+    // Note that we may be navigating to the same host name and the target will already exist.
+    const promises = [];
+    for (const dbg of lazy.wdm.getWorkerDebuggerEnumerator()) {
+      const alreadyCreated = watcherDataObject.workers.some(
+        info => info.dbg === dbg
+      );
+      if (
+        this.shouldHandleWorker(sessionData, dbg, "service_worker") &&
+        !alreadyCreated
+      ) {
+        promises.push(this.createWorkerTargetActor(watcherDataObject, dbg));
+      }
+    }
+    await Promise.all(promises);
+  }
+}
+
+export const ServiceWorkerTargetWatcher = new ServiceWorkerTargetWatcherClass();