1 /* 2 * Copyright (C) 2010 Google Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 */ 26 27 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_EVENT_QUEUE_H_ 28 #define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_EVENT_QUEUE_H_ 29 30 #include "third_party/blink/public/platform/task_type.h" 31 #include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h" 32 #include "third_party/blink/renderer/platform/wtf/linked_hash_set.h" 33 34 namespace blink { 35 36 class Event; 37 class ExecutionContext; 38 39 class CORE_EXPORT EventQueue final : public GarbageCollected<EventQueue>, 40 public ExecutionContextLifecycleObserver { 41 public: 42 EventQueue(ExecutionContext*, TaskType); 43 ~EventQueue(); 44 45 void Trace(Visitor*) const override; 46 bool EnqueueEvent(const base::Location&, Event&); 47 void CancelAllEvents(); 48 bool HasPendingEvents() const; 49 50 private: 51 bool RemoveEvent(Event&); 52 void DispatchEvent(Event*); 53 54 void ContextDestroyed() override; 55 void Close(ExecutionContext*); 56 void DoCancelAllEvents(ExecutionContext*); 57 58 const TaskType task_type_; 59 HeapLinkedHashSet<Member<Event>> queued_events_; 60 bool is_closed_; 61 }; 62 63 } // namespace blink 64 65 #endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_EVENT_QUEUE_H_ 66