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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 "content/browser/renderer_host/process_selection_deferring_condition_runner.h"
#include "base/functional/callback.h"
#include "content/browser/renderer_host/navigation_request.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_client.h"
#include "url/origin.h"
namespace content {
// static
std::unique_ptr<ProcessSelectionDeferringConditionRunner>
ProcessSelectionDeferringConditionRunner::Create(
NavigationRequest& navigation_request) {
std::unique_ptr<ProcessSelectionDeferringConditionRunner> runner =
base::WrapUnique(new ProcessSelectionDeferringConditionRunner());
runner->RegisterProcessSelectionDeferringConditions(navigation_request);
return runner;
}
ProcessSelectionDeferringConditionRunner::
ProcessSelectionDeferringConditionRunner() = default;
ProcessSelectionDeferringConditionRunner::
~ProcessSelectionDeferringConditionRunner() = default;
void ProcessSelectionDeferringConditionRunner::
RegisterProcessSelectionDeferringConditions(
NavigationRequest& navigation_request) {
deferring_conditions_ =
GetContentClient()
->browser()
->CreateProcessSelectionDeferringConditionsForNavigation(
navigation_request);
}
void ProcessSelectionDeferringConditionRunner::OnRequestRedirected() {
for (auto& deferring_condition : deferring_conditions_) {
deferring_condition->OnRequestRedirected();
}
}
void ProcessSelectionDeferringConditionRunner::WillSelectFinalProcess(
base::OnceClosure on_completion_callback) {
on_completion_callback_ = std::move(on_completion_callback);
ProcessNextCondition();
}
void ProcessSelectionDeferringConditionRunner::ProcessNextCondition() {
if (deferring_conditions_.empty()) {
std::move(on_completion_callback_).Run();
return;
}
auto resume_closure = base::BindOnce(
&ProcessSelectionDeferringConditionRunner::ResumeProcessing,
weak_factory_.GetWeakPtr());
ProcessSelectionDeferringCondition* condition =
deferring_conditions_.begin()->get();
switch (condition->OnWillSelectFinalProcess(std::move(resume_closure))) {
case ProcessSelectionDeferringCondition::Result::kDefer:
// TODO(crbug.com/440164018): Add histograms to measure deferral metrics.
return;
case ProcessSelectionDeferringCondition::Result::kProceed:
ResumeProcessing();
return;
}
}
void ProcessSelectionDeferringConditionRunner::ResumeProcessing() {
CHECK(!deferring_conditions_.empty());
deferring_conditions_.erase(deferring_conditions_.begin());
ProcessNextCondition();
}
} // namespace content
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