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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.
#ifndef EXTENSIONS_BROWSER_API_OFFSCREEN_LIFETIME_ENFORCER_FACTORIES_H_
#define EXTENSIONS_BROWSER_API_OFFSCREEN_LIFETIME_ENFORCER_FACTORIES_H_
#include <map>
#include "base/functional/callback.h"
#include "base/no_destructor.h"
#include "extensions/browser/api/offscreen/offscreen_document_lifetime_enforcer.h"
#include "extensions/common/api/offscreen.h"
namespace extensions {
// A registry of factories to create different lifetime enforcers for
// offscreen documents.
class LifetimeEnforcerFactories {
public:
using Factory = base::RepeatingCallback<
std::unique_ptr<OffscreenDocumentLifetimeEnforcer>(
OffscreenDocumentHost*,
OffscreenDocumentLifetimeEnforcer::TerminationCallback,
OffscreenDocumentLifetimeEnforcer::NotifyInactiveCallback)>;
using FactoryMap = std::map<api::offscreen::Reason, Factory>;
// A helper utility to allow overriding the lifetime enforcement of different
// reasons for testing purposes.
class TestingOverride {
public:
TestingOverride();
TestingOverride(const TestingOverride&) = delete;
TestingOverride& operator=(const TestingOverride&) = delete;
~TestingOverride();
FactoryMap& map() { return map_; }
private:
FactoryMap map_;
};
// Creates a new instance of the appropriate lifetime enforcer for the given
// `reason`.
static std::unique_ptr<OffscreenDocumentLifetimeEnforcer> GetLifetimeEnforcer(
api::offscreen::Reason reason,
OffscreenDocumentHost* offscreen_document,
OffscreenDocumentLifetimeEnforcer::TerminationCallback
termination_callback,
OffscreenDocumentLifetimeEnforcer::NotifyInactiveCallback
activity_changed_callback);
private:
friend class base::NoDestructor<LifetimeEnforcerFactories>;
LifetimeEnforcerFactories();
~LifetimeEnforcerFactories();
void InitializeFactories();
// A map of all reasons for creating an offscreen document to their registered
// lifetime enforcer.
FactoryMap map_;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_OFFSCREEN_LIFETIME_ENFORCER_FACTORIES_H_
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