tor-browser

commit 2308a6c19b2e0cee0d5cf9e457018113e0ecc76c
parent c4e4daedd249e738e5e1d85aa41fa1c4dd72f0a6
Author: Edgar Chen <echen@mozilla.com>
Date:   Mon,  5 Jan 2026 20:42:25 +0000

Bug 2002996 - Should not copy coalesced events when generating pointercapture events; r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D277780

Diffstat:
M
dom/events/PointerEventHandler.cpp
 | 
3
++-
M
widget/MouseEvents.h
 | 
10
++++++----

2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/dom/events/PointerEventHandler.cpp b/dom/events/PointerEventHandler.cpp
@@ -1532,7 +1532,8 @@ void PointerEventHandler::DispatchGotOrLostPointerCaptureEvent(
       aIsGotCapture ? ePointerGotCapture : ePointerLostCapture,
       aPointerEvent->mWidget);
 
-  localEvent.AssignPointerEventData(*aPointerEvent, true);
+  localEvent.AssignPointerEventData(*aPointerEvent, /* aCopyTargets */ true,
+                                    /* aCopyCoalescedEvents */ false);
   DebugOnly<nsresult> rv = presShell->HandleEventWithTarget(
       &localEvent, aCaptureTarget->GetPrimaryFrame(), aCaptureTarget, &status);
 
diff --git a/widget/MouseEvents.h b/widget/MouseEvents.h
@@ -412,9 +412,10 @@ class WidgetMouseEvent : public WidgetMouseEventBase,
    */
   Maybe<uint64_t> mCallbackId;
 
-  void AssignMouseEventData(const WidgetMouseEvent& aEvent, bool aCopyTargets) {
+  void AssignMouseEventData(const WidgetMouseEvent& aEvent, bool aCopyTargets,
+                            bool aCopyCoalescedEvents = true) {
     AssignMouseEventBaseData(aEvent, aCopyTargets);
-    AssignPointerHelperData(aEvent, /* aCopyCoalescedEvents */ true);
+    AssignPointerHelperData(aEvent, aCopyCoalescedEvents);
     AssignMouseEventDataOnly(aEvent);
   }
 
@@ -919,8 +920,9 @@ class WidgetPointerEvent : public WidgetMouseEvent {
 
   // XXX Not tested by test_assign_event_data.html
   void AssignPointerEventData(const WidgetPointerEvent& aEvent,
-                              bool aCopyTargets) {
-    AssignMouseEventData(aEvent, aCopyTargets);
+                              bool aCopyTargets,
+                              bool aCopyCoalescedEvents = true) {
+    AssignMouseEventData(aEvent, aCopyTargets, aCopyCoalescedEvents);
 
     mWidth = aEvent.mWidth;
     mHeight = aEvent.mHeight;