webkit: move SimpleDatabaseSystem into webkit/support/

It is used by DRT and by test_shell, so it belongs in webkit/support/.

Review URL: http://codereview.chromium.org/6657011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@77550 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 84 insertions, 0 deletions

diff --git a/webkit/support/simple_database_system.h b/webkit/support/simple_database_system.h
new file mode 100644
index 0000000..682c123
--- /dev/null
+++ b/webkit/support/simple_database_system.h
@@ -0,0 +1,84 @@
+// Copyright (c) 2010 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 WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_
+#define WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_
+
+#include "base/file_path.h"
+#include "base/hash_tables.h"
+#include "base/platform_file.h"
+#include "base/ref_counted.h"
+#include "base/scoped_temp_dir.h"
+#include "base/string16.h"
+#include "base/synchronization/lock.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDatabaseObserver.h"
+#include "webkit/database/database_connections.h"
+#include "webkit/database/database_tracker.h"
+
+class SimpleDatabaseSystem : public webkit_database::DatabaseTracker::Observer,
+                             public WebKit::WebDatabaseObserver {
+ public:
+  static SimpleDatabaseSystem* GetInstance();
+  SimpleDatabaseSystem();
+  ~SimpleDatabaseSystem();
+
+  // VFS functions
+  base::PlatformFile OpenFile(const string16& vfs_file_name, int desired_flags);
+  int DeleteFile(const string16& vfs_file_name, bool sync_dir);
+  long GetFileAttributes(const string16& vfs_file_name);
+  long long GetFileSize(const string16& vfs_file_name);
+
+  // database tracker functions
+  void DatabaseOpened(const string16& origin_identifier,
+                      const string16& database_name,
+                      const string16& description,
+                      int64 estimated_size);
+  void DatabaseModified(const string16& origin_identifier,
+                        const string16& database_name);
+  void DatabaseClosed(const string16& origin_identifier,
+                      const string16& database_name);
+
+  // DatabaseTracker::Observer implementation
+  virtual void OnDatabaseSizeChanged(const string16& origin_identifier,
+                                     const string16& database_name,
+                                     int64 database_size,
+                                     int64 space_available);
+  virtual void OnDatabaseScheduledForDeletion(const string16& origin_identifier,
+                                              const string16& database_name);
+
+  // WebDatabaseObserver implementation
+  virtual void databaseOpened(const WebKit::WebDatabase& database);
+  virtual void databaseModified(const WebKit::WebDatabase& database);
+  virtual void databaseClosed(const WebKit::WebDatabase& database);
+
+  void ClearAllDatabases();
+  void SetDatabaseQuota(int64 quota);
+
+ private:
+  // The calls that come from the database tracker run on the main thread.
+  // Therefore, we can only call DatabaseUtil::GetFullFilePathForVfsFile()
+  // on the main thread. However, the VFS calls run on the DB thread and
+  // they need to crack VFS file paths. To resolve this problem, we store
+  // a map of vfs_file_names to file_paths. The map is updated on the main
+  // thread on each DatabaseOpened() call that comes from the database
+  // tracker, and is read on the DB thread by each VFS call.
+  void SetFullFilePathsForVfsFile(const string16& origin_identifier,
+                                  const string16& database_name);
+  FilePath GetFullFilePathForVfsFile(const string16& vfs_file_name);
+
+  static SimpleDatabaseSystem* instance_;
+
+  bool waiting_for_dbs_to_close_;
+
+  ScopedTempDir temp_dir_;
+
+  scoped_refptr<webkit_database::DatabaseTracker> db_tracker_;
+
+  base::Lock file_names_lock_;
+  base::hash_map<string16, FilePath> file_names_;
+
+  webkit_database::DatabaseConnections database_connections_;
+};
+
+#endif  // WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_