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// Copyright 2014 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.
#ifndef EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_H_
#define EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_H_
#include <map>
#include "base/macros.h"
#include "base/memory/linked_ptr.h"
#include "base/scoped_observer.h"
#include "components/keyed_service/core/keyed_service.h"
#include "extensions/browser/extension_registry_observer.h"
#include "extensions/common/host_id.h"
namespace content {
class BrowserContext;
}
namespace extensions {
class DeclarativeUserScriptMaster;
// Manages a set of DeclarativeUserScriptMaster objects for script injections.
class DeclarativeUserScriptManager : public KeyedService,
public ExtensionRegistryObserver {
public:
explicit DeclarativeUserScriptManager(
content::BrowserContext* browser_context);
~DeclarativeUserScriptManager() override;
// Convenience method to return the DeclarativeUserScriptManager for a given
// |context|.
static DeclarativeUserScriptManager* Get(content::BrowserContext* context);
// Gets the user script master for declarative scripts by the given
// HostID; if one does not exist, a new object will be created.
DeclarativeUserScriptMaster* GetDeclarativeUserScriptMasterByID(
const HostID& host_id);
private:
using UserScriptMasterMap =
std::map<HostID, linked_ptr<DeclarativeUserScriptMaster>>;
// ExtensionRegistryObserver:
void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) override;
// Creates a DeclarativeUserScriptMaster object.
DeclarativeUserScriptMaster* CreateDeclarativeUserScriptMaster(
const HostID& host_id);
// A map of DeclarativeUserScriptMasters for each host; each master
// is lazily initialized.
UserScriptMasterMap declarative_user_script_masters_;
content::BrowserContext* browser_context_;
ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
extension_registry_observer_;
DISALLOW_COPY_AND_ASSIGN(DeclarativeUserScriptManager);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_H_
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