blob: ce7c9a17b212b26ac1ce97b33c391394087ed628 [file] [log] [blame]
// Copyright 2017 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.
#include "content/public/common/input_event_ack_state.h"
#include "third_party/blink/public/platform/scheduler/web_thread_scheduler.h"
#include "third_party/blink/public/platform/web_input_event.h"
namespace content {
class MainThreadEventQueue;
// A work item to execute from the main thread event queue.
// The MainThreadEventQueue supports 2 types of tasks (subclasses):
// 1) Closures
// 2) WebInputEvent
class MainThreadEventQueueTask {
virtual ~MainThreadEventQueueTask() {}
enum class FilterResult {
// The passed in event was coalesced into this event. Don't queue
// the new event.
// Stop invoking FilterNewEvent on any other events in the queue.
// Keep invoking FilterNewEvent on the next older event in the queue.
// Filter a new event that is about to be queued. Acceptable actions
// are to coalesce event, stop iterating or keep iterating.
// Iteration of the list begins at the end of the queue (newest to oldest).
virtual FilterResult FilterNewEvent(MainThreadEventQueueTask*) = 0;
virtual bool IsWebInputEvent() const = 0;
virtual void Dispatch(MainThreadEventQueue*) = 0;
} // namespace content