Notify Blink about start of gesture scroll through a queued event.

third_party/WebKit/Source/core/events/PointerEventFactory.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/events/PointerEventFactory.h"
 
 namespace blink {
 
 namespace {
 
@@ skipping 148 matching lines @@
         touchPoint.force(), pointerEventInit.buttons()));
 
     UIEventWithKeyState::setFromPlatformModifiers(pointerEventInit, modifiers);
 
     pointerEventInit.setBubbles(!isEnterOrLeave);
     pointerEventInit.setCancelable(!isEnterOrLeave && pointState != PlatformTouchPoint::TouchCancelled);
 
     return PointerEvent::create(type, pointerEventInit);
 }
 
-
-PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::createPointerCancel(const PlatformTouchPoint& touchPoint)
+PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::createPointerCancel(const int pointerId, const WebPointerProperties::PointerType pointerType)
 {
     PointerEventInit pointerEventInit;
 
-    setIdTypeButtons(pointerEventInit, touchPoint.pointerProperties(), 0);
-
+    pointerEventInit.setPointerId(pointerId);
+    pointerEventInit.setPointerType(pointerTypeNameForWebPointPointerType(pointerType));
+    pointerEventInit.setIsPrimary(isPrimary(pointerId));
     pointerEventInit.setBubbles(true);
     pointerEventInit.setCancelable(false);
 
     return PointerEvent::create(EventTypeNames::pointercancel, pointerEventInit);
 }
 
 PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::create(
     PassRefPtrWillBeRawPtr<PointerEvent> pointerEvent,
     const AtomicString& type,
     PassRefPtrWillBeRawPtr<EventTarget> relatedTarget)
@@ skipping 74 matching lines @@
     // We do not handle the overflow of m_currentId as it should be very rare
     int mappedId = m_currentId++;
     if (!m_idCount[type])
         m_primaryId[type] = mappedId;
     m_idCount[type]++;
     m_pointerIncomingIdMapping.add(p, mappedId);
     m_pointerIdMapping.add(mappedId, PointerAttributes(p, isActiveButtons));
     return mappedId;
 }
 
-bool PointerEventFactory::remove(
-    const PassRefPtrWillBeRawPtr<PointerEvent> pointerEvent)
+bool PointerEventFactory::remove(const int mappedId)
 {
-    int mappedId = pointerEvent->pointerId();
     // Do not remove mouse pointer id as it should always be there
     if (mappedId == s_mouseId || !m_pointerIdMapping.contains(mappedId))
         return false;
 
     IncomingId p = m_pointerIdMapping.get(mappedId).incomingId;
     int type = p.pointerType();
     m_pointerIdMapping.remove(mappedId);
     m_pointerIncomingIdMapping.remove(p);
     if (m_primaryId[type] == mappedId)
         m_primaryId[type] = PointerEventFactory::s_invalidId;
     m_idCount[type]--;
     return true;
 }
 
+WillBeHeapVector<int> PointerEventFactory::getPointerIdsOfType(WebPointerProperties::PointerType pointerType)
+{
+    WillBeHeapVector<int> mappedIds;
+
+    for (auto iter = m_pointerIdMapping.begin(); iter != m_pointerIdMapping.end(); ++iter) {
+        int mappedId = iter->key;
+        if (iter->value.incomingId.pointerType() == static_cast<int>(pointerType))
+            mappedIds.append(mappedId);
+    }
+
+    return mappedIds;
+}
+
 bool PointerEventFactory::isPrimary(int mappedId) const
 {
     if (!m_pointerIdMapping.contains(mappedId))
         return false;
 
     IncomingId p = m_pointerIdMapping.get(mappedId).incomingId;
     return m_primaryId[p.pointerType()] == mappedId;
 }
 
 bool PointerEventFactory::isActive(const int pointerId)
 {
     return m_pointerIdMapping.contains(pointerId);
 }
 
 bool PointerEventFactory::isActiveButtonsState(const int pointerId)
 {
     return m_pointerIdMapping.contains(pointerId)
         && m_pointerIdMapping.get(pointerId).isActiveButtons;
 }
 
 } // namespace blink