chromium/components/history/core/browser/features.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/history/core/browser/features.h"

#include "build/build_config.h"
#include "components/history/core/browser/top_sites_impl.h"
#include "components/sync/base/features.h"

namespace history {
namespace …  // namespace

// If enabled, the most repeated queries from the user browsing history are
// shown in the Most Visited tiles.
BASE_FEATURE(…);

// The maximum number of repeatable queries to show in the Most Visited tiles.
const base::FeatureParam<int> kMaxNumRepeatableQueries(
    &kOrganicRepeatableQueries,
    "MaxNumRepeatableQueries",
    kMaxNumRepeatableQueriesDefaultValue);

// Whether the scores for the repeatable queries and the most visited sites
// should first be scaled to an equivalent range before mixing.
const base::FeatureParam<bool> kScaleRepeatableQueriesScores(
    &kOrganicRepeatableQueries,
    "ScaleRepeatableQueriesScores",
    kScaleRepeatableQueriesScoresDefaultValue);

// Whether a repeatable query should precede a most visited site with equal
// score. The default behavior is for the sites to precede the queries.
// Used for tie-breaking, especially when kScaleRepeatableQueriesScores is true.
const base::FeatureParam<bool> kPrivilegeRepeatableQueries(
    &kOrganicRepeatableQueries,
    "PrivilegeRepeatableQueries",
    false);

// Whether duplicative visits should be ignored for the repeatable queries. A
// duplicative visit is a visit to the same search term in an interval smaller
// than kAutocompleteDuplicateVisitIntervalThreshold.
const base::FeatureParam<bool> kRepeatableQueriesIgnoreDuplicateVisits(
    &kOrganicRepeatableQueries,
    "RepeatableQueriesIgnoreDuplicateVisits",
    is_android);

// The maximum number of days since the last visit (in days) in order for a
// search query to considered as a repeatable query.
const base::FeatureParam<int> kRepeatableQueriesMaxAgeDays(
    &kOrganicRepeatableQueries,
    "RepeatableQueriesMaxAgeDays",
    90);

// The minimum number of visits for a search query to considered as a
// repeatable query.
const base::FeatureParam<int> kRepeatableQueriesMinVisitCount(
    &kOrganicRepeatableQueries,
    "RepeatableQueriesMinVisitCount",
    is_android ? 6 : 1);

BASE_FEATURE(…);

}  // namespace history