1 files changed, 65 insertions, 0 deletions
diff --git a/devtools/server/actors/performance-entries.js b/devtools/server/actors/performance-entries.js
new file mode 100644
index 000000000..89434324a
--- /dev/null
+++ b/devtools/server/actors/performance-entries.js
@@ -0,0 +1,65 @@
+/* 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/. */
+
+/**
+ * The performanceEntries actor emits events corresponding to performance
+ * entries. It receives `performanceentry` events containing the performance
+ * entry details and emits an event containing the name, type, origin, and
+ * epoch of the performance entry.
+ */
+
+const { Actor, ActorClassWithSpec } = require("devtools/shared/protocol");
+const performanceSpec = require("devtools/shared/specs/performance-entries");
+const events = require("sdk/event/core");
+
+var PerformanceEntriesActor = ActorClassWithSpec(performanceSpec, {
+  listenerAdded: false,
+
+  initialize: function (conn, tabActor) {
+    Actor.prototype.initialize.call(this, conn);
+    this.window = tabActor.window;
+  },
+
+  /**
+   * Start tracking the user timings.
+   */
+  start: function () {
+    if (!this.listenerAdded) {
+      this.onPerformanceEntry = this.onPerformanceEntry.bind(this);
+      this.window.addEventListener("performanceentry", this.onPerformanceEntry, true);
+      this.listenerAdded = true;
+    }
+  },
+
+  /**
+   * Stop tracking the user timings.
+   */
+  stop: function () {
+    if (this.listenerAdded) {
+      this.window.removeEventListener("performanceentry", this.onPerformanceEntry, true);
+      this.listenerAdded = false;
+    }
+  },
+
+  disconnect: function () {
+    this.destroy();
+  },
+
+  destroy: function () {
+    this.stop();
+    Actor.prototype.destroy.call(this);
+  },
+
+  onPerformanceEntry: function (e) {
+    let emitDetail = {
+      type: e.entryType,
+      name: e.name,
+      origin: e.origin,
+      epoch: e.epoch
+    };
+    events.emit(this, "entry", emitDetail);
+  }
+});
+
+exports.PerformanceEntriesActor = PerformanceEntriesActor;