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
|
// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_NO_STATE_PREFETCH_BROWSER_NO_STATE_PREFETCH_HISTORY_H_
#define COMPONENTS_NO_STATE_PREFETCH_BROWSER_NO_STATE_PREFETCH_HISTORY_H_
#include <stddef.h>
#include <list>
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "base/values.h"
#include "components/no_state_prefetch/common/no_state_prefetch_final_status.h"
#include "components/no_state_prefetch/common/no_state_prefetch_origin.h"
#include "url/gurl.h"
namespace prerender {
// NoStatePrefetchHistory maintains a per-session history of prefetched pages
// and their final dispositions. It has a fixed maximum capacity, and old
// items in history will be removed when the capacity is reached.
class NoStatePrefetchHistory {
public:
// Entry is an individual entry in the history list. It corresponds to a
// specific prefetched page.
struct Entry {
Entry() : final_status(FINAL_STATUS_UNKNOWN), origin(ORIGIN_MAX) {}
Entry(const GURL& url_arg,
FinalStatus final_status_arg,
Origin origin_arg,
base::Time end_time_arg)
: url(url_arg),
final_status(final_status_arg),
origin(origin_arg),
end_time(end_time_arg) {}
// The URL which was prefetched. This should be the URL included in the
// <link rel="prerender"> tag, and not any URLs which it may have redirected
// to.
GURL url;
// The FinalStatus describing whether the prefetched page was used or why
// it was cancelled.
FinalStatus final_status;
// The Origin describing where the prefetch originated from.
Origin origin;
// Time the NoStatePrefetchContents was destroyed.
base::Time end_time;
};
// Creates a history with capacity for |max_items| entries.
explicit NoStatePrefetchHistory(size_t max_items);
NoStatePrefetchHistory(const NoStatePrefetchHistory&) = delete;
NoStatePrefetchHistory& operator=(const NoStatePrefetchHistory&) = delete;
~NoStatePrefetchHistory();
// Adds |entry| to the history. If at capacity, the oldest entry is dropped.
void AddEntry(const Entry& entry);
// Deletes all history entries.
void Clear();
// Retrieves the entries as a list of values which can be displayed.
base::Value::List CopyEntriesAsValue() const;
private:
std::list<Entry> entries_;
size_t max_items_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace prerender
#endif // COMPONENTS_NO_STATE_PREFETCH_BROWSER_NO_STATE_PREFETCH_HISTORY_H_
|
