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// Copyright 2025 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/performance_manager/policies/process_rank_policy_android.h"
#include <utility>
#include "base/android/android_info.h"
#include "base/check.h"
#include "base/feature_list.h"
#include "base/not_fatal_until.h"
#include "chrome/browser/flags/android/chrome_feature_list.h"
#include "chrome/browser/performance_manager/policies/discard_eligibility_policy.h"
#include "content/public/browser/android/child_process_importance.h"
namespace performance_manager::policies {
ProcessRankPolicyAndroid::ProcessRankPolicyAndroid()
: ProcessRankPolicyAndroid(content::IsPerceptibleImportanceSupported()) {}
ProcessRankPolicyAndroid::ProcessRankPolicyAndroid(
bool is_perceptible_importance_supported)
: is_perceptible_importance_supported_(
is_perceptible_importance_supported) {}
ProcessRankPolicyAndroid::~ProcessRankPolicyAndroid() = default;
void ProcessRankPolicyAndroid::OnPassedToGraph(Graph* graph) {
DCHECK(graph->HasOnlySystemNode());
graph->AddPageNodeObserver(this);
}
void ProcessRankPolicyAndroid::OnTakenFromGraph(Graph* graph) {
graph->RemovePageNodeObserver(this);
}
void ProcessRankPolicyAndroid::OnPageNodeAdded(const PageNode* page_node) {
PageLiveStateDecorator::Data::GetOrCreateForPageNode(page_node)->AddObserver(
this);
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnBeforePageNodeRemoved(
const PageNode* page_node) {
PageLiveStateDecorator::Data::GetOrCreateForPageNode(page_node)
->RemoveObserver(this);
}
void ProcessRankPolicyAndroid::OnTypeChanged(const PageNode* page_node,
PageType previous_type) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsFocusedChanged(const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsVisibleChanged(const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsAudibleChanged(const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnHasPictureInPictureChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnMainFrameUrlChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnMainFrameDocumentChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnPageNotificationPermissionStatusChange(
const PageNode* page_node,
std::optional<blink::mojom::PermissionStatus> previous_status) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnHadFormInteractionChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnHadUserEditsChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsActiveTabChanged(const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsAutoDiscardableChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsCapturingVideoChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsCapturingAudioChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsBeingMirroredChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsCapturingWindowChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsCapturingDisplayChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsConnectedToBluetoothDeviceChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsConnectedToUSBDeviceChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsPinnedTabChanged(const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnIsDevToolsOpenChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::OnUpdatedTitleOrFaviconInBackgroundChanged(
const PageNode* page_node) {
UpdateProcessRank(page_node);
}
void ProcessRankPolicyAndroid::UpdateProcessRank(const PageNode* page_node) {
content::ChildProcessImportance importance = CalculateRank(page_node);
const base::WeakPtr<content::WebContents> web_contents =
page_node->GetWebContents();
CHECK(web_contents, base::NotFatalUntil::M140);
if (web_contents) {
web_contents->SetPrimaryMainFrameImportance(importance);
}
}
content::ChildProcessImportance ProcessRankPolicyAndroid::CalculateRank(
const PageNode* page_node) {
if (page_node->IsFocused()) {
return content::ChildProcessImportance::IMPORTANT;
} else if (page_node->IsVisible()) {
if (base::FeatureList::IsEnabled(
chrome::android::kChangeUnfocusedPriority)) {
return content::ChildProcessImportance::MODERATE;
} else {
return content::ChildProcessImportance::IMPORTANT;
}
}
if (!base::FeatureList::IsEnabled(chrome::android::kProtectedTabsAndroid) ||
!is_perceptible_importance_supported_) {
const PageLiveStateDecorator::Data* live_state_data =
PageLiveStateDecorator::Data::FromPageNode(page_node);
if (live_state_data && live_state_data->IsActiveTab()) {
return content::ChildProcessImportance::MODERATE;
}
}
if (base::FeatureList::IsEnabled(chrome::android::kProtectedTabsAndroid)) {
DiscardEligibilityPolicy* eligibility_policy =
DiscardEligibilityPolicy::GetFromGraph(GetOwningGraph());
CHECK(eligibility_policy);
if (eligibility_policy->CanDiscard(
page_node, DiscardEligibilityPolicy::DiscardReason::PROACTIVE) !=
CanDiscardResult::kEligible) {
if (is_perceptible_importance_supported_) {
return content::ChildProcessImportance::PERCEPTIBLE;
} else if (chrome::android::kFallbackToModerateParam.Get()) {
return content::ChildProcessImportance::MODERATE;
}
}
}
return content::ChildProcessImportance::NORMAL;
}
} // namespace performance_manager::policies
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