class SHistoryListener { constructor() { this.retval = true; this.last = "initial"; } OnHistoryNewEntry() { this.last = "newentry"; } OnHistoryGotoIndex() { this.last = "gotoindex"; } OnHistoryPurge() { this.last = "purge"; } OnHistoryReload() { this.last = "reload"; return this.retval; } OnHistoryReplaceEntry() {} } SHistoryListener.prototype.QueryInterface = ChromeUtils.generateQI([ "nsISHistoryListener", "nsISupportsWeakReference", ]); let listeners; export class Bug422543Child extends JSWindowActorChild { constructor() { super(); } actorCreated() { if (listeners) { return; } this.shistory = this.docShell.nsIWebNavigation.sessionHistory; listeners = [new SHistoryListener(), new SHistoryListener()]; for (let listener of listeners) { this.shistory.legacySHistory.addSHistoryListener(listener); } } cleanup() { for (let listener of listeners) { this.shistory.legacySHistory.removeSHistoryListener(listener); } this.shistory = null; listeners = null; return {}; } getListenerStatus() { return listeners.map(l => l.last); } resetListeners() { for (let listener of listeners) { listener.last = "initial"; } return {}; } notifyReload() { let history = this.shistory.legacySHistory; let rval = history.notifyOnHistoryReload(); return { rval }; } setRetval({ num, val }) { listeners[num].retval = val; return {}; } receiveMessage(msg) { switch (msg.name) { case "cleanup": return this.cleanup(); case "getListenerStatus": return this.getListenerStatus(); case "notifyReload": return this.notifyReload(); case "resetListeners": return this.resetListeners(); case "setRetval": return this.setRetval(msg.data); } return null; } }