blob: 480f67714f3a6cf4b7d3c4faf588df04349203a5 (
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
|
// 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 CHROME_BROWSER_INSTANT_PROMO_COUNTER_H_
#define CHROME_BROWSER_INSTANT_PROMO_COUNTER_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "base/time.h"
class PrefService;
class Profile;
// PromoCounter is used to track whether a promo should be shown. The promo is
// shown for a specified number of days or sessions (launches of chrome).
class PromoCounter {
public:
// Creates a new PromoCounter. |pref_key| is used to store prefs related to
// the promo. |histogram_key| is the key used to store histograms related to
// the promo. See the .cc file for the exact prefs and histogram values used.
// |ShouldShow| returns true until the users restarts chrome |max_sessions| or
// runs Chrome for |max_days|, or |Hide| is invoked.
PromoCounter(Profile* profile,
const std::string& pref_key,
const std::string& histogram_key,
int max_sessions,
int max_days);
~PromoCounter();
// Registers the preferences used by PromoCounter.
static void RegisterUserPrefs(PrefService* prefs,
const std::string& base_key);
// Returns true if the promo should be shown.
bool ShouldShow(base::Time current_time);
// Permanently hides the promo.
void Hide();
private:
// Called the first time ShouldShow is invoked. Updates the necessary pref
// state and show_.
void Init(base::Time current_time);
// Invoked if the max number of sessions has been encountered.
void MaxSessionsEncountered(base::Time current_time);
// Invoked if the max number of days has elapsed.
void MaxTimeLapsed(base::Time current_time);
Profile* profile_;
// Base key all prefs are stored under.
const std::string pref_key_;
// Base key used for histograms.
const std::string histogram_key_;
// Max number of sessions/days before the promo stops.
const int max_sessions_;
const int max_days_;
// Has Init been invoked?
bool did_init_;
// Return value from ShouldShow.
bool show_;
// Initial time the promo was first shown.
base::Time initial_show_;
DISALLOW_COPY_AND_ASSIGN(PromoCounter);
};
#endif // CHROME_BROWSER_INSTANT_PROMO_COUNTER_H_
|
