1 files changed, 84 insertions, 0 deletions
diff --git a/remote/marionette/actors/MarionetteEventsChild.sys.mjs b/remote/marionette/actors/MarionetteEventsChild.sys.mjs
new file mode 100644
index 0000000000..031215e5fc
--- /dev/null
+++ b/remote/marionette/actors/MarionetteEventsChild.sys.mjs
@@ -0,0 +1,84 @@
+/* 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/. */
+
+/* eslint-disable no-restricted-globals */
+
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  event: "chrome://remote/content/marionette/event.sys.mjs",
+  Log: "chrome://remote/content/shared/Log.sys.mjs",
+});
+
+XPCOMUtils.defineLazyGetter(lazy, "logger", () =>
+  lazy.Log.get(lazy.Log.TYPES.MARIONETTE)
+);
+
+export class MarionetteEventsChild extends JSWindowActorChild {
+  get innerWindowId() {
+    return this.manager.innerWindowId;
+  }
+
+  actorCreated() {
+    // Prevent the logger from being created if the current log level
+    // isn't set to 'trace'. This is important for a faster content process
+    // creation when Marionette is running.
+    if (lazy.Log.isTraceLevelOrOrMore) {
+      lazy.logger.trace(
+        `[${this.browsingContext.id}] MarionetteEvents actor created ` +
+          `for window id ${this.innerWindowId}`
+      );
+    }
+  }
+
+  handleEvent({ target, type }) {
+    if (!Services.cpmm.sharedData.get("MARIONETTE_EVENTS_ENABLED")) {
+      // The parent process will set MARIONETTE_EVENTS_ENABLED to false when
+      // the Marionette session ends to avoid unnecessary inter process
+      // communications
+      return;
+    }
+
+    // Ignore invalid combinations of load events and document's readyState.
+    if (
+      (type === "DOMContentLoaded" && target.readyState != "interactive") ||
+      (type === "pageshow" && target.readyState != "complete")
+    ) {
+      lazy.logger.warn(
+        `Ignoring event '${type}' because document has an invalid ` +
+          `readyState of '${target.readyState}'.`
+      );
+      return;
+    }
+
+    switch (type) {
+      case "beforeunload":
+      case "DOMContentLoaded":
+      case "hashchange":
+      case "pagehide":
+      case "pageshow":
+      case "popstate":
+        this.sendAsyncMessage("MarionetteEventsChild:PageLoadEvent", {
+          browsingContext: this.browsingContext,
+          documentURI: target.documentURI,
+          readyState: target.readyState,
+          type,
+          windowId: this.innerWindowId,
+        });
+        break;
+
+      // Listen for click event to indicate one click has happened, so actions
+      // code can send dblclick event
+      case "click":
+        lazy.event.DoubleClickTracker.setClick();
+        break;
+      case "dblclick":
+      case "unload":
+        lazy.event.DoubleClickTracker.resetClick();
+        break;
+    }
+  }
+}