Pointerevent capture APIs

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

 // 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.
 
 #ifndef PointerEventFactory_h
 #define PointerEventFactory_h
 
 #include "core/CoreExport.h"
 #include "core/events/PointerEvent.h"
 #include "public/platform/WebPointerProperties.h"
@@ skipping 32 matching lines @@
         const PlatformTouchPoint&);
 
     PassRefPtrWillBeRawPtr<PointerEvent> create(
         PassRefPtrWillBeRawPtr<PointerEvent>,
         const AtomicString& type,
         PassRefPtrWillBeRawPtr<EventTarget>);
 
     // Clear all the existing ids.
     void clear();
 
-    // When a pointerEvent with a particular id is removed that id is considered
-    // free even though there might have been other PointerEvents that were
-    // generated with the same id before.
-    void remove(const PassRefPtrWillBeRawPtr<PointerEvent>);
+    // Returns true if pointerEvent is removed. When a pointerEvent with a
+    // particular id is removed that id is considered free even though there
+    // might have been other PointerEvents that were generated with the same id
+    // before.
+    bool remove(const PassRefPtrWillBeRawPtr<PointerEvent>);
 
     // Returns whether a pointer id exists and active
     bool isActive(const int);
 
     // Returns whether a pointer id exists and has at least one pressed button
     bool isActiveButtonsState(const int);
 
 private:
     typedef WTF::UnsignedWithZeroKeyHashTraits<int> UnsignedHash;
     typedef struct IncomingId : public std::pair<int, int> {
@@ skipping 10 matching lines @@
         PointerAttributes() {}
         PointerAttributes(IncomingId incomingId, unsigned isActiveButtons)
         : incomingId(incomingId)
         , isActiveButtons(isActiveButtons) {}
     } PointerAttributes;
 
     int addIdAndActiveButtons(const IncomingId, bool isActiveButtons);
     bool isPrimary(const int) const;
     void setIdTypeButtons(PointerEventInit &, const WebPointerProperties &,
         unsigned buttons);
+
     static const int s_invalidId;
     static const int s_mouseId;
 
     int m_currentId;
     HashMap<IncomingId, int, WTF::PairHash<int, int>, WTF::PairHashTraits<UnsignedHash, UnsignedHash>> m_pointerIncomingIdMapping;
     HashMap<int, PointerAttributes, WTF::IntHash<int>, UnsignedHash> m_pointerIdMapping;
     int m_primaryId[static_cast<int>(WebPointerProperties::PointerType::LastEntry) + 1];
     int m_idCount[static_cast<int>(WebPointerProperties::PointerType::LastEntry) + 1];
 };
 
 } // namespace blink
 
 #endif // PointerEventFactory_h