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// 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 "chrome/browser/ui/performance_controls/high_efficiency_chip_tab_helper.h"
#include "chrome/browser/performance_manager/public/user_tuning/user_performance_tuning_manager.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/performance_controls/high_efficiency_utils.h"
#include "chrome/common/pref_names.h"
#include "components/performance_manager/public/features.h"
#include "components/performance_manager/public/user_tuning/prefs.h"
#include "content/public/browser/visibility.h"
#include "content/public/common/url_constants.h"
HighEfficiencyChipTabHelper::~HighEfficiencyChipTabHelper() = default;
void HighEfficiencyChipTabHelper::DidStartNavigation(
content::NavigationHandle* navigation_handle) {
// Pages can only be discarded while they are in the background, and we only
// need to inform the user after they have been subsequently reloaded so it
// is sufficient to wait for a StartNavigation event before updating this
// variable.
if (!navigation_handle->IsInPrimaryMainFrame() ||
navigation_handle->IsSameDocument()) {
// Ignore navigations from inner frames because we only care about
// top-level discards. Ignore same-document navigations because actual
// discard reloads will not be same-document navigations and including
// them causes the state to get reset.
return;
}
was_rendered_ = false;
ComputeChipState(navigation_handle);
}
void HighEfficiencyChipTabHelper::OnVisibilityChanged(
content::Visibility visibility) {
if (visibility == content::Visibility::HIDDEN) {
was_rendered_ = false;
if (chip_state_ == high_efficiency::ChipState::EXPANDED_WITH_SAVINGS ||
chip_state_ == high_efficiency::ChipState::EXPANDED_EDUCATION) {
chip_state_ = high_efficiency::ChipState::COLLAPSED_FROM_EXPANDED;
}
}
}
bool HighEfficiencyChipTabHelper::ShouldChipAnimate() {
bool should_animate = !was_rendered_;
was_rendered_ = true;
return should_animate;
}
HighEfficiencyChipTabHelper::HighEfficiencyChipTabHelper(
content::WebContents* contents)
: content::WebContentsObserver(contents),
content::WebContentsUserData<HighEfficiencyChipTabHelper>(*contents) {
pref_service_ =
Profile::FromBrowserContext(contents->GetBrowserContext())->GetPrefs();
}
bool HighEfficiencyChipTabHelper::ComputeShouldHighlightMemorySavings() {
if (!base::FeatureList::IsEnabled(
performance_manager::features::kMemorySavingsReportingImprovements)) {
return false;
}
bool const savings_over_threshold =
static_cast<int>(high_efficiency::GetDiscardedMemorySavingsInBytes(
&GetWebContents())) >
performance_manager::features::kExpandedHighEfficiencyChipThresholdBytes
.Get();
base::Time const last_expanded_timestamp =
pref_service_->GetTime(prefs::kLastHighEfficiencyChipExpandedTimestamp);
bool const expanded_chip_not_shown_recently =
(base::Time::Now() - last_expanded_timestamp) >
performance_manager::features::kExpandedHighEfficiencyChipFrequency.Get();
auto* pre_discard_resource_usage =
performance_manager::user_tuning::UserPerformanceTuningManager::
PreDiscardResourceUsage::FromWebContents(&GetWebContents());
bool const tab_discard_time_over_threshold =
pre_discard_resource_usage &&
(base::LiveTicks::Now() -
pre_discard_resource_usage->discard_liveticks()) >
performance_manager::features::
kExpandedHighEfficiencyChipDiscardedDuration.Get();
if (savings_over_threshold && expanded_chip_not_shown_recently &&
tab_discard_time_over_threshold) {
pref_service_->SetTime(prefs::kLastHighEfficiencyChipExpandedTimestamp,
base::Time::Now());
return true;
}
return false;
}
bool HighEfficiencyChipTabHelper::ComputeShouldEducateAboutMemorySavings() {
int times_rendered =
pref_service_->GetInteger(prefs::kHighEfficiencyChipExpandedCount);
if (times_rendered < kChipAnimationCount) {
pref_service_->SetInteger(prefs::kHighEfficiencyChipExpandedCount,
times_rendered + 1);
return true;
}
return false;
}
void HighEfficiencyChipTabHelper::ComputeChipState(
content::NavigationHandle* navigation_handle) {
// This high efficiency chip only appears for eligible sites that have been
// proactively discarded.
bool const was_discarded = navigation_handle->ExistingDocumentWasDiscarded();
absl::optional<mojom::LifecycleUnitDiscardReason> const discard_reason =
high_efficiency::GetDiscardReason(navigation_handle->GetWebContents());
bool const is_site_supported =
high_efficiency::IsURLSupported(navigation_handle->GetURL());
if (!(was_discarded &&
discard_reason == mojom::LifecycleUnitDiscardReason::PROACTIVE &&
is_site_supported)) {
chip_state_ = high_efficiency::ChipState::HIDDEN;
} else if (ComputeShouldEducateAboutMemorySavings()) {
chip_state_ = high_efficiency::ChipState::EXPANDED_EDUCATION;
} else if (ComputeShouldHighlightMemorySavings()) {
chip_state_ = high_efficiency::ChipState::EXPANDED_WITH_SAVINGS;
} else {
chip_state_ = high_efficiency::ChipState::COLLAPSED;
}
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(HighEfficiencyChipTabHelper);
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