From 80e4577e3b10245164d6a2c2416772b2819a9f6a Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Tue, 6 Aug 2019 08:52:49 +0000
Subject: Issue #1118 Part 3: Add a public RemoveAllListeners method on
 EventListenerManager.

---
 dom/events/EventListenerManager.cpp | 21 ++++++++++++++++++---
 dom/events/EventListenerManager.h   |  8 +++++++-
 2 files changed, 25 insertions(+), 4 deletions(-)

(limited to 'dom')

diff --git a/dom/events/EventListenerManager.cpp b/dom/events/EventListenerManager.cpp
index fe896870c..0774c3296 100644
--- a/dom/events/EventListenerManager.cpp
+++ b/dom/events/EventListenerManager.cpp
@@ -166,11 +166,11 @@ EventListenerManager::~EventListenerManager()
   // XXX azakai: Is there any reason to not just call Disconnect
   //             from right here, if not previously called?
   NS_ASSERTION(!mTarget, "didn't call Disconnect");
-  RemoveAllListeners();
+  RemoveAllListenersSilently();
 }
 
 void
-EventListenerManager::RemoveAllListeners()
+EventListenerManager::RemoveAllListenersSilently()
 {
   if (mClearingListeners) {
     return;
@@ -1329,7 +1329,7 @@ void
 EventListenerManager::Disconnect()
 {
   mTarget = nullptr;
-  RemoveAllListeners();
+  RemoveAllListenersSilently();
 }
 
 void
@@ -1734,6 +1734,21 @@ EventListenerManager::IsApzAwareEvent(nsIAtom* aEvent)
   return false;
 }
 
+void
+EventListenerManager::RemoveAllListeners()
+{
+  while (!mListeners.IsEmpty()) {
+    size_t idx = mListeners.Length() - 1;
+    nsCOMPtr<nsIAtom> type = mListeners.ElementAt(idx).mTypeAtom;
+    EventMessage message = mListeners.ElementAt(idx).mEventMessage;
+    mListeners.RemoveElementAt(idx);
+    NotifyEventListenerRemoved(type);
+    if (IsDeviceType(message)) {
+      DisableDevice(message);
+    }
+  }
+}
+
 already_AddRefed<nsIScriptGlobalObject>
 EventListenerManager::GetScriptGlobalAndDocument(nsIDocument** aDoc)
 {
diff --git a/dom/events/EventListenerManager.h b/dom/events/EventListenerManager.h
index 6b0927788..36637cfd7 100644
--- a/dom/events/EventListenerManager.h
+++ b/dom/events/EventListenerManager.h
@@ -472,6 +472,12 @@ public:
   bool IsApzAwareListener(Listener* aListener);
   bool IsApzAwareEvent(nsIAtom* aEvent);
 
+  /**
+   * Remove all event listeners from the event target this EventListenerManager
+   * is for.
+   */
+  void RemoveAllListeners();
+
 protected:
   void HandleEventInternal(nsPresContext* aPresContext,
                            WidgetEvent* aEvent,
@@ -604,7 +610,7 @@ protected:
                                    const nsAString& aTypeString,
                                    const EventListenerFlags& aFlags,
                                    bool aAllEvents = false);
-  void RemoveAllListeners();
+  void RemoveAllListenersSilently();
   void NotifyEventListenerRemoved(nsIAtom* aUserType);
   const EventTypeData* GetTypeDataForIID(const nsIID& aIID);
   const EventTypeData* GetTypeDataForEventName(nsIAtom* aName);
-- 
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