| /* |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_SCOPED_EVENT_QUEUE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_SCOPED_EVENT_QUEUE_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/dom/events/event.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/heap/persistent.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class CORE_EXPORT ScopedEventQueue { |
| USING_FAST_MALLOC(ScopedEventQueue); |
| |
| public: |
| ~ScopedEventQueue(); |
| |
| void EnqueueEvent(Event&); |
| static ScopedEventQueue* Instance(); |
| |
| void IncrementScopingLevel(); |
| void DecrementScopingLevel(); |
| bool ShouldQueueEvents() const { return scoping_level_ > 0; } |
| |
| private: |
| ScopedEventQueue(); |
| static void Initialize(); |
| void DispatchAllEvents(); |
| void DispatchEvent(Event&) const; |
| |
| PersistentHeapVector<Member<Event>> queued_events_; |
| unsigned scoping_level_; |
| |
| static ScopedEventQueue* instance_; |
| DISALLOW_COPY_AND_ASSIGN(ScopedEventQueue); |
| }; |
| |
| class EventQueueScope { |
| STACK_ALLOCATED(); |
| |
| public: |
| EventQueueScope() { ScopedEventQueue::Instance()->IncrementScopingLevel(); } |
| ~EventQueueScope() { ScopedEventQueue::Instance()->DecrementScopingLevel(); } |
| DISALLOW_COPY_AND_ASSIGN(EventQueueScope); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_SCOPED_EVENT_QUEUE_H_ |