From a036d642ca5fbb3c4109fac27c3e1382d84a3d45 Mon Sep 17 00:00:00 2001
From: Trevor Saunders <tbsaunde@tbsaunde.org>
Date: Mon, 5 Sep 2016 14:52:12 -0400
Subject: [PATCH] bug 1270916 - make TreeMutation track if it should be
 queueing events r=davidb

Soon we will want to know if events should be emitted independt of EventTrees.
---
 accessible/base/EventTree.cpp | 3 ++-
 accessible/base/EventTree.h   | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/accessible/base/EventTree.cpp b/accessible/base/EventTree.cpp
index 596f1125d8ee..d1d00487adba 100644
--- a/accessible/base/EventTree.cpp
+++ b/accessible/base/EventTree.cpp
@@ -25,7 +25,8 @@ EventTree* const TreeMutation::kNoEventTree = reinterpret_cast<EventTree*>(-1);
 TreeMutation::TreeMutation(Accessible* aParent, bool aNoEvents) :
   mParent(aParent), mStartIdx(UINT32_MAX),
   mStateFlagsCopy(mParent->mStateFlags),
-  mEventTree(aNoEvents ? kNoEventTree : nullptr)
+  mEventTree(aNoEvents ? kNoEventTree : nullptr),
+  mQueueEvents(!aNoEvents)
 {
 #ifdef DEBUG
   mIsDone = false;
diff --git a/accessible/base/EventTree.h b/accessible/base/EventTree.h
index a6ae8b1a1c55..d0c8024527a1 100644
--- a/accessible/base/EventTree.h
+++ b/accessible/base/EventTree.h
@@ -49,6 +49,11 @@ private:
   uint32_t mStateFlagsCopy;
   EventTree* mEventTree;
 
+  /*
+   * True if mutation events should be queued.
+   */
+  bool mQueueEvents;
+
 #ifdef DEBUG
   bool mIsDone;
 #endif