| // 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 BoundaryEventDispatcher_h |
| #define BoundaryEventDispatcher_h |
| |
| #include "core/events/EventTarget.h" |
| |
| namespace blink { |
| |
| // This class contains the common logic of finding related node in a boundary |
| // crossing action and sending boundary events. The subclasses of this class |
| // must define what events should be sent in every case. |
| class BoundaryEventDispatcher { |
| STACK_ALLOCATED() |
| public: |
| BoundaryEventDispatcher() {} |
| virtual ~BoundaryEventDispatcher() {} |
| |
| void SendBoundaryEvents(EventTarget* exited_target, |
| EventTarget* entered_target); |
| |
| protected: |
| virtual void DispatchOut(EventTarget*, EventTarget* related_target) = 0; |
| virtual void DispatchOver(EventTarget*, EventTarget* related_target) = 0; |
| virtual void DispatchLeave(EventTarget*, |
| EventTarget* related_target, |
| bool check_for_listener) = 0; |
| virtual void DispatchEnter(EventTarget*, |
| EventTarget* related_target, |
| bool check_for_listener) = 0; |
| virtual AtomicString GetLeaveEvent() = 0; |
| virtual AtomicString GetEnterEvent() = 0; |
| }; |
| |
| } // namespace blink |
| |
| #endif // BoundaryEventDispatcher_h |