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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.
#ifndef CHROME_BROWSER_ASH_EXTENSIONS_INSTALL_LIMITER_H_
#define CHROME_BROWSER_ASH_EXTENSIONS_INSTALL_LIMITER_H_
#include <stdint.h>
#include <optional>
#include <set>
#include "base/containers/queue.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "chrome/browser/extensions/crx_installer.h"
#include "components/keyed_service/core/keyed_service.h"
namespace extensions {
// InstallLimiter defers big app installs after all small app installs and then
// runs big app installs one by one. This improves first-time login experience.
// See http://crbug.com/166296
class InstallLimiter : public KeyedService {
public:
static InstallLimiter* Get(Profile* profile);
// Install should be deferred if the size is larger than 1MB and the app is
// not the screensaver in demo mode (which requires instant installation to
// avoid visual delay).
static bool ShouldDeferInstall(int64_t app_size, const std::string& app_id);
InstallLimiter();
InstallLimiter(const InstallLimiter&) = delete;
InstallLimiter& operator=(const InstallLimiter&) = delete;
~InstallLimiter() override;
void DisableForTest();
void Add(const scoped_refptr<CrxInstaller>& installer,
const CRXFileInfo& file_info);
// Triggers installation of deferred installations if all file sizes for
// added installations have been determined.
void OnAllExternalProvidersReady();
private:
// DeferredInstall holds info to run a CrxInstaller later.
struct DeferredInstall {
DeferredInstall(const scoped_refptr<CrxInstaller>& installer,
const CRXFileInfo& file_info);
DeferredInstall(const DeferredInstall& other);
~DeferredInstall();
const scoped_refptr<CrxInstaller> installer;
const CRXFileInfo file_info;
};
using DeferredInstallList = base::queue<DeferredInstall>;
// Adds install info with size. If |size| is greater than a certain threshold,
// it stores the install info into |deferred_installs_| to run it later.
// Otherwise, it just runs the installer.
void AddWithSize(const scoped_refptr<CrxInstaller>& installer,
const CRXFileInfo& file_info,
std::optional<int64_t> size);
// Checks and runs deferred big app installs when appropriate.
void CheckAndRunDeferrredInstalls();
// Starts install using passed-in info and observes |installer|'s done
// notification.
void RunInstall(const scoped_refptr<CrxInstaller>& installer,
const CRXFileInfo& file_info);
// Called when CrxInstaller::InstallCrx() finishes.
void OnInstallerDone(const std::optional<CrxInstallError>& error);
// Checks that OnAllExternalProvidersReady() has been called and all file
// sizes for added installations are determined. If this method returns true,
// we can directly continue installing all remaining extensions, since there
// will be no more added installations coming.
bool AllInstallsQueuedWithFileSize() const;
DeferredInstallList deferred_installs_;
// Counts how many installs are currently running.
uint32_t num_running_installs_ = 0;
// A timer to wait before running deferred big app install.
base::OneShotTimer wait_timer_;
bool disabled_for_test_;
bool all_external_providers_ready_ = false;
int num_installs_waiting_for_file_size_ = 0;
base::WeakPtrFactory<InstallLimiter> weak_ptr_factory_{this};
};
} // namespace extensions
#endif // CHROME_BROWSER_ASH_EXTENSIONS_INSTALL_LIMITER_H_
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