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// Copyright (c) 2006-2008 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.
// Contains the history backend wrapper around the in-memory URL database. This
// object maintains an in-memory cache of the subset of history required to do
// in-line autocomplete.
//
// It is created on the history thread and passed to the main thread where
// operations can be completed synchronously. It listenes for notifications
// from the "regular" history backend and keeps itself in sync.
#ifndef CHROME_BROWSER_HISTORY_IN_MEMORY_HISTORY_BACKEND_H__
#define CHROME_BROWSER_HISTORY_IN_MEMORY_HISTORY_BACKEND_H__
#include <string>
#include "base/basictypes.h"
#include "chrome/browser/history/history_notifications.h"
#include "chrome/common/notification_service.h"
class HistoryDatabase;
class Profile;
namespace history {
class InMemoryDatabase;
class InMemoryHistoryBackend : public NotificationObserver {
public:
InMemoryHistoryBackend();
~InMemoryHistoryBackend();
// Initializes with data from the given history database.
bool Init(const std::wstring& history_filename);
// Does initialization work when this object is attached to the history
// system on the main thread. The argument is the profile with which the
// attached history service is under.
void AttachToHistoryService(Profile* profile);
// Returns the underlying database associated with this backend. The current
// autocomplete code was written fro this, but it should probably be removed
// so that it can deal directly with this object, rather than the DB.
InMemoryDatabase* db() const {
return db_.get();
}
// Notification callback.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
FRIEND_TEST(HistoryBackendTest, DeleteAll);
// Handler for NOTIFY_HISTORY_TYPED_URLS_MODIFIED.
void OnTypedURLsModified(const URLsModifiedDetails& details);
// Handler for NOTIFY_HISTORY_URLS_DELETED.
void OnURLsDeleted(const URLsDeletedDetails& details);
scoped_ptr<InMemoryDatabase> db_;
// The profile that this object is attached. May be NULL before
// initialization.
Profile* profile_;
// Set when this object has registered for notifications. This is done so we
// know whether to unregister (the initialization may have failed, so we
// may be destroyed before attaching to the main thread.
bool registered_for_notifications_;
DISALLOW_EVIL_CONSTRUCTORS(InMemoryHistoryBackend);
};
} // namespace history
#endif // CHROME_BROWSER_IN_MEMORY_HISTORY_BACKEND_H__
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