1 files changed, 108 insertions, 0 deletions
diff --git a/dom/events/EventListenerService.h b/dom/events/EventListenerService.h
new file mode 100644
index 0000000000..8b0b95f130
--- /dev/null
+++ b/dom/events/EventListenerService.h
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_EventListenerService_h_
+#define mozilla_EventListenerService_h_
+
+#include "jsapi.h"
+#include "mozilla/Attributes.h"
+#include "nsCycleCollectionParticipant.h"
+#include "EventListenerManager.h"
+#include "nsIEventListenerService.h"
+#include "nsString.h"
+#include "nsTObserverArray.h"
+#include "nsTHashMap.h"
+#include "nsGkAtoms.h"
+
+class nsIMutableArray;
+
+namespace mozilla {
+namespace dom {
+class EventTarget;
+}  // namespace dom
+
+template <typename T>
+class Maybe;
+
+class EventListenerChange final : public nsIEventListenerChange {
+ public:
+  explicit EventListenerChange(dom::EventTarget* aTarget);
+
+  void AddChangedListenerName(nsAtom* aEventName);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEVENTLISTENERCHANGE
+
+ protected:
+  virtual ~EventListenerChange();
+  nsCOMPtr<dom::EventTarget> mTarget;
+  nsTArray<RefPtr<nsAtom>> mChangedListenerNames;
+};
+
+class EventListenerInfo final : public nsIEventListenerInfo {
+ public:
+  EventListenerInfo(EventListenerManager* aListenerManager,
+                    const nsAString& aType,
+                    JS::Handle<JSObject*> aScriptedListener,
+                    JS::Handle<JSObject*> aScriptedListenerGlobal,
+                    bool aCapturing, bool aAllowsUntrusted,
+                    bool aInSystemEventGroup, bool aIsHandler);
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(EventListenerInfo)
+  NS_DECL_NSIEVENTLISTENERINFO
+
+ protected:
+  virtual ~EventListenerInfo();
+
+  bool GetJSVal(JSContext* aCx, Maybe<JSAutoRealm>& aAr,
+                JS::MutableHandle<JS::Value> aJSVal);
+
+  RefPtr<EventListenerManager> mListenerManager;
+  nsString mType;
+  JS::Heap<JSObject*> mScriptedListener;  // May be null.
+  // mScriptedListener may be a cross-compartment wrapper so we cannot use it
+  // with JSAutoRealm because CCWs are not associated with a single realm. We
+  // use this global instead (must be same-compartment with mScriptedListener
+  // and must be non-null if mScriptedListener is non-null).
+  JS::Heap<JSObject*> mScriptedListenerGlobal;
+  bool mCapturing;
+  bool mAllowsUntrusted;
+  bool mInSystemEventGroup;
+  bool mIsHandler;
+};
+
+class EventListenerService final : public nsIEventListenerService {
+  ~EventListenerService();
+
+ public:
+  EventListenerService();
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEVENTLISTENERSERVICE
+
+  static void NotifyAboutMainThreadListenerChange(dom::EventTarget* aTarget,
+                                                  nsAtom* aName) {
+    if (sInstance) {
+      sInstance->NotifyAboutMainThreadListenerChangeInternal(aTarget, aName);
+    }
+  }
+
+  void NotifyPendingChanges();
+
+ private:
+  void NotifyAboutMainThreadListenerChangeInternal(dom::EventTarget* aTarget,
+                                                   nsAtom* aName);
+  nsTObserverArray<nsCOMPtr<nsIListenerChangeListener>> mChangeListeners;
+  nsCOMPtr<nsIMutableArray> mPendingListenerChanges;
+  nsTHashMap<nsISupportsHashKey, RefPtr<EventListenerChange>>
+      mPendingListenerChangesSet;
+
+  static EventListenerService* sInstance;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_EventListenerService_h_