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// Copyright (c) 2011 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 CHROME_BROWSER_BROWSING_DATA_FILE_SYSTEM_HELPER_H_
#define CHROME_BROWSER_BROWSING_DATA_FILE_SYSTEM_HELPER_H_
#pragma once
#include <string>
#include <vector>
#include "base/callback_old.h"
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/time.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/gurl.h"
#include "webkit/fileapi/file_system_types.h"
class Profile;
// BrowsingDataFileSystemHelper is an interface for classes dealing with
// aggregating and deleting browsing data stored in local filesystems. A
// client of this class needs to call StartFetching from the UI thread to
// initiate the flow, and it'll be notified by the callback in its UI thread at
// some later point. The client must call CancelNotification() if it's
// destroyed before the callback is notified.
class BrowsingDataFileSystemHelper
: public base::RefCountedThreadSafe<BrowsingDataFileSystemHelper> {
public:
// Contains detailed information about a filesystem
struct FileSystemInfo {
FileSystemInfo(
const GURL& origin,
bool has_persistent,
bool has_temporary,
int64 usage_persistent,
int64 usage_temporary);
~FileSystemInfo();
bool IsFileSchemeData() {
return origin.scheme() == chrome::kFileScheme;
}
GURL origin;
bool has_persistent;
bool has_temporary;
int64 usage_persistent;
int64 usage_temporary;
};
// Create a BrowsingDataFileSystemHelper instance for the filesystems
// stored in |profile|'s user data directory.
static BrowsingDataFileSystemHelper* Create(Profile* profile);
// Starts the fetching process, which will notify its completion via
// callback.
// This must be called only in the UI thread.
virtual void StartFetching(
Callback1<const std::vector<FileSystemInfo>& >::Type* callback) = 0;
// Cancels the notification callback (i.e., the window that created it no
// longer exists).
// This must be called only in the UI thread.
virtual void CancelNotification() = 0;
// Requests a single filesystem to be deleted in the FILE thread.
virtual void DeleteFileSystemOrigin(const GURL& origin) = 0;
protected:
friend class base::RefCountedThreadSafe<BrowsingDataFileSystemHelper>;
virtual ~BrowsingDataFileSystemHelper() {}
};
// This class is an implementation of BrowsingDataFileSystemHelper that does
// not fetch its information from the filesystem tracker, but gets it passed
// in as a parameter.
class CannedBrowsingDataFileSystemHelper
: public BrowsingDataFileSystemHelper {
public:
explicit CannedBrowsingDataFileSystemHelper(Profile* profile);
// Return a copy of the filesystem helper. Only one consumer can use the
// StartFetching method at a time, so we need to create a copy of the helper
// everytime we instantiate a cookies tree model for it.
CannedBrowsingDataFileSystemHelper* Clone();
// Add a filesystem to the set of canned filesystems that is
// returned by this helper.
void AddFileSystem(const GURL& origin,
fileapi::FileSystemType type,
int64 size);
// Clear the list of canned filesystems.
void Reset();
// True if no filesystems are currently stored.
bool empty() const;
// BrowsingDataFileSystemHelper methods.
virtual void StartFetching(
Callback1<const std::vector<FileSystemInfo>& >::Type* callback);
virtual void CancelNotification() {}
virtual void DeleteFileSystemOrigin(const GURL& origin) {}
private:
struct PendingFileSystemInfo {
PendingFileSystemInfo();
PendingFileSystemInfo(const GURL& origin,
fileapi::FileSystemType type,
int64 size);
~PendingFileSystemInfo();
GURL origin;
fileapi::FileSystemType type;
int64 size;
};
// StartFetching's callback should be executed asynchronously, Notify handles
// that nicely.
void Notify();
virtual ~CannedBrowsingDataFileSystemHelper();
Profile* profile_;
std::vector<PendingFileSystemInfo> pending_file_system_info_;
std::vector<FileSystemInfo> file_system_info_;
scoped_ptr<Callback1<const std::vector<FileSystemInfo>& >::Type >
completion_callback_;
// Indicates whether or not we're currently fetching information:
// it's true when StartFetching() is called in the UI thread, and it's reset
// after we notified the callback in the UI thread.
// This only mutates on the UI thread.
bool is_fetching_;
DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataFileSystemHelper);
};
#endif // CHROME_BROWSER_BROWSING_DATA_FILE_SYSTEM_HELPER_H_
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