chromium/third_party/blink/renderer/core/events/pointer_event_factory.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_POINTER_EVENT_FACTORY_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_POINTER_EVENT_FACTORY_H_

#include <optional>

#include "third_party/blink/public/common/input/pointer_id.h"
#include "third_party/blink/public/common/input/web_pointer_event.h"
#include "third_party/blink/public/common/input/web_pointer_properties.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/events/pointer_event.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/deque.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"

namespace blink {

// Helper class for tracking the pointer ids for each type of PointerEvents.
// Using id re-mapping at this layer, this class makes sure that regardless of
// the domain of the id (i.e. in touch or pen) the corresponding pointer event
// will have a unique id amongst all pointer events as per pointer events'
// specification. This class intended to behave the same as existing browsers as
// much as possible for compatibility reasons. Particularly it behaves very
// similar to MS Edge to have pointer event ids generated by mouse always equal
// 1 and those that are generated by touch and pen will have increasing ids from
// 2.
class CORE_EXPORT PointerEventFactory { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_POINTER_EVENT_FACTORY_H_