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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/app_list/search/app_search_provider.h"
#include <string>
#include <string_view>
#include <utility>
#include "ash/public/cpp/app_list/app_list_features.h"
#include "base/callback_list.h"
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/i18n/rtl.h"
#include "base/metrics/histogram_macros.h"
#include "base/time/time.h"
#include "chrome/browser/ash/app_list/app_list_model_updater.h"
#include "chrome/browser/ash/app_list/search/app_search_data_source.h"
#include "chrome/browser/ash/app_list/search/chrome_search_result.h"
#include "chrome/browser/ash/app_list/search/types.h"
namespace app_list {
namespace {
// Checks if current locale is non Latin locales.
bool IsNonLatinLocale(std::string_view locale) {
// A set of of non Latin locales. This set is used to select appropriate
// algorithm for app search.
static constexpr char kNonLatinLocales[][6] = {
"am", "ar", "be", "bg", "bn", "el", "fa", "gu", "hi",
"hy", "iw", "ja", "ka", "kk", "km", "kn", "ko", "ky",
"lo", "mk", "ml", "mn", "mr", "my", "pa", "ru", "sr",
"ta", "te", "th", "uk", "zh-CN", "zh-HK", "zh-TW"};
return base::Contains(kNonLatinLocales, locale);
}
} // namespace
AppSearchProvider::AppSearchProvider(AppSearchDataSource* data_source)
: SearchProvider(SearchCategory::kApps), data_source_(data_source) {
app_updates_subscription_ =
data_source_->SubscribeToAppUpdates(base::BindRepeating(
&AppSearchProvider::UpdateResults, base::Unretained(this)));
}
AppSearchProvider::~AppSearchProvider() = default;
void AppSearchProvider::Start(const std::u16string& query) {
query_ = query;
query_start_time_ = base::TimeTicks::Now();
// We only need to record app search latency for queries started by user.
record_query_uma_ = true;
{
// Prevent `UpdateResults()` from running as a result of a data source
// refresh callback to avoid double update.
base::AutoReset<bool> auto_reset(&updates_blocked_, true);
data_source_->RefreshIfNeeded();
}
UpdateResults();
}
void AppSearchProvider::StopQuery() {
query_.clear();
record_query_uma_ = false;
}
ash::AppListSearchResultType AppSearchProvider::ResultType() const {
return ash::AppListSearchResultType::kInstalledApp;
}
void AppSearchProvider::UpdateResults() {
if (updates_blocked_ || query_.empty())
return;
SearchProvider::Results new_results;
const bool use_exact_match =
app_list_features::IsExactMatchForNonLatinLocaleEnabled() &&
IsNonLatinLocale(base::i18n::GetConfiguredLocale());
if (use_exact_match) {
new_results = data_source_->GetExactMatches(query_);
} else {
new_results = data_source_->GetFuzzyMatches(query_);
}
if (record_query_uma_) {
record_query_uma_ = false;
UMA_HISTOGRAM_TIMES("Apps.AppList.AppSearchProvider.QueryTime",
base::TimeTicks::Now() - query_start_time_);
}
SwapResults(&new_results);
}
} // namespace app_list
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