blob: 992ff0c7d825ec4121da6fddd302c43021bf7758 [file] [log] [blame]
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "extensions/browser/extension_registrar.h"
#include "extensions/common/extension_id.h"
#include "extensions/shell/browser/shell_keep_alive_requester.h"
namespace base {
class FilePath;
} // namespace base
namespace content {
class BrowserContext;
} // namespace content
namespace extensions {
class Extension;
// Handles extension loading and reloading using ExtensionRegistrar.
class ShellExtensionLoader : public ExtensionRegistrar::Delegate {
explicit ShellExtensionLoader(content::BrowserContext* browser_context);
~ShellExtensionLoader() override;
// Loads an unpacked extension from a directory synchronously. Returns the
// extension on success, or nullptr otherwise.
const Extension* LoadExtension(const base::FilePath& extension_dir);
// Starts reloading the extension. A keep-alive is maintained until the
// reload succeeds/fails. If the extension is an app, it will be launched upon
// reloading.
// This may invalidate references to the old Extension object, so it takes the
// ID by value.
void ReloadExtension(ExtensionId extension_id);
// If the extension loaded successfully, enables it. If it's an app, launches
// it. If the load failed, updates ShellKeepAliveRequester.
void FinishExtensionReload(const ExtensionId old_extension_id,
scoped_refptr<const Extension> extension);
// ExtensionRegistrar::Delegate:
void PreAddExtension(const Extension* extension,
const Extension* old_extension) override;
void PostActivateExtension(scoped_refptr<const Extension> extension) override;
void PostDeactivateExtension(
scoped_refptr<const Extension> extension) override;
void LoadExtensionForReload(
const ExtensionId& extension_id,
const base::FilePath& path,
ExtensionRegistrar::LoadErrorBehavior load_error_behavior) override;
bool CanEnableExtension(const Extension* extension) override;
bool CanDisableExtension(const Extension* extension) override;
bool ShouldBlockExtension(const Extension* extension) override;
content::BrowserContext* browser_context_; // Not owned.
// Registers and unregisters extensions.
ExtensionRegistrar extension_registrar_;
// Holds keep-alives for relaunching apps.
ShellKeepAliveRequester keep_alive_requester_;
// Indicates that we posted the (asynchronous) task to start reloading.
// Used by ReloadExtension() to check whether ExtensionRegistrar calls
// LoadExtensionForReload().
bool did_schedule_reload_ = false;
base::WeakPtrFactory<ShellExtensionLoader> weak_factory_;
} // namespace extensions