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// Copyright 2020 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_ATTRIBUTION_GROUP_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_ATTRIBUTION_GROUP_H_
#include "third_party/blink/public/common/input/web_input_event_attribution.h"
#include "third_party/blink/renderer/platform/wtf/hash_functions.h"
#include "third_party/blink/renderer/platform/wtf/hash_traits.h"
namespace blink {
namespace scheduler {
// A hashable wrapper around a WebInputEventAttribution that can be used to
// group pending events together.
struct AttributionGroup {
explicit AttributionGroup(WebInputEventAttribution attribution)
: attribution(attribution) {}
explicit AttributionGroup(WTF::HashTableDeletedValueType)
: is_deleted_value(true) {}
AttributionGroup() = default;
bool IsHashTableDeletedValue() const { return is_deleted_value; }
bool operator==(const AttributionGroup& other) const {
return attribution == other.attribution &&
is_deleted_value == other.is_deleted_value;
}
WebInputEventAttribution attribution = {};
bool is_deleted_value = false;
};
struct AttributionGroupHash {
STATIC_ONLY(AttributionGroupHash);
static unsigned GetHash(const AttributionGroup& group) {
return group.attribution.GetHash();
}
static bool Equal(const AttributionGroup& a, const AttributionGroup& b) {
return a == b;
}
static const bool safe_to_compare_to_empty_or_deleted = true;
};
} // namespace scheduler
} // namespace blink
namespace WTF {
template <>
struct DefaultHash<blink::scheduler::AttributionGroup> {
using Hash = blink::scheduler::AttributionGroupHash;
};
template <>
struct HashTraits<blink::scheduler::AttributionGroup>
: SimpleClassHashTraits<blink::scheduler::AttributionGroup> {
static const bool kEmptyValueIsZero = false;
};
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_ATTRIBUTION_GROUP_H_
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