blob: e77705ffecb516b5fa81c8760b1d45950f4b49ed (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// 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_HISTORY_TOP_SITES_BACKEND_H_
#define CHROME_BROWSER_HISTORY_TOP_SITES_BACKEND_H_
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/history/history_types.h"
class CancelableTaskTracker;
namespace base {
class FilePath;
}
namespace history {
class TopSitesDatabase;
// Service used by TopSites to have db interaction happen on the DB thread. All
// public methods are invoked on the ui thread and get funneled to the DB
// thread.
class TopSitesBackend : public base::RefCountedThreadSafe<TopSitesBackend> {
public:
// The boolean parameter indicates if the DB existed on disk or needs to be
// migrated.
typedef base::Callback<void(const scoped_refptr<MostVisitedThumbnails>&,
const bool*)>
GetMostVisitedThumbnailsCallback;
TopSitesBackend();
void Init(const base::FilePath& path);
// Schedules the db to be shutdown.
void Shutdown();
// Fetches MostVisitedThumbnails.
void GetMostVisitedThumbnails(
const GetMostVisitedThumbnailsCallback& callback,
CancelableTaskTracker* tracker);
// Updates top sites database from the specified delta.
void UpdateTopSites(const TopSitesDelta& delta);
// Sets the thumbnail.
void SetPageThumbnail(const MostVisitedURL& url,
int url_rank,
const Images& thumbnail);
// Deletes the database and recreates it.
void ResetDatabase();
// Schedules a request that does nothing on the DB thread, but then notifies
// the the calling thread with a reply. This is used to make sure the db has
// finished processing a request.
void DoEmptyRequest(const base::Closure& reply,
CancelableTaskTracker* tracker);
private:
friend class base::RefCountedThreadSafe<TopSitesBackend>;
virtual ~TopSitesBackend();
// Invokes Init on the db_.
void InitDBOnDBThread(const base::FilePath& path);
// Shuts down the db.
void ShutdownDBOnDBThread();
// Does the work of getting the most visted thumbnails.
void GetMostVisitedThumbnailsOnDBThread(
scoped_refptr<MostVisitedThumbnails> thumbnails,
bool* need_history_migration);
// Updates top sites.
void UpdateTopSitesOnDBThread(const TopSitesDelta& delta);
// Sets the thumbnail.
void SetPageThumbnailOnDBThread(const MostVisitedURL& url,
int url_rank,
const Images& thumbnail);
// Resets the database.
void ResetDatabaseOnDBThread(const base::FilePath& file_path);
base::FilePath db_path_;
scoped_ptr<TopSitesDatabase> db_;
DISALLOW_COPY_AND_ASSIGN(TopSitesBackend);
};
} // namespace history
#endif // CHROME_BROWSER_HISTORY_TOP_SITES_BACKEND_H_
|
