| // 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 UI_EVENTS_BLINK_COMPOSITOR_THREAD_EVENT_QUEUE_H_ |
| #define UI_EVENTS_BLINK_COMPOSITOR_THREAD_EVENT_QUEUE_H_ |
| |
| #include <deque> |
| #include <memory> |
| |
| #include "ui/events/blink/event_with_callback.h" |
| |
| namespace ui { |
| |
| namespace test { |
| class InputHandlerProxyEventQueueTest; |
| } |
| |
| // CompositorThreadEventQueue is a coalescing queue. It will examine |
| // the current events in the queue and will attempt to coalesce with |
| // the last event. |
| class CompositorThreadEventQueue { |
| public: |
| CompositorThreadEventQueue(); |
| ~CompositorThreadEventQueue(); |
| |
| // Adds an event to the queue. The event may be coalesced with the last event. |
| void Queue(std::unique_ptr<EventWithCallback> event, |
| base::TimeTicks timestamp_now); |
| |
| std::unique_ptr<EventWithCallback> Pop(); |
| |
| bool empty() const { return queue_.empty(); } |
| |
| size_t size() const { return queue_.size(); } |
| |
| private: |
| friend class test::InputHandlerProxyEventQueueTest; |
| using EventQueue = std::deque<std::unique_ptr<EventWithCallback>>; |
| EventQueue queue_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CompositorThreadEventQueue); |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_EVENTS_BLINK_COMPOSITOR_THREAD_EVENT_QUEUE_H_ |