1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_BASE_L10N_TIME_FORMAT_H_
6 #define UI_BASE_L10N_TIME_FORMAT_H_
8 #include "base/basictypes.h"
9 #include "base/strings/string16.h"
10 #include "ui/base/ui_export.h"
19 // Methods to format time values as strings.
20 class UI_EXPORT TimeFormat {
22 // TimeElapsed, TimeRemaining and TimeRemainingShort functions:
23 // These functions return a localized string of approximate time duration. The
24 // conditions are simpler than PastTime since these functions are used for
25 // in-progress operations and users have different expectations of units.
27 // Returns times in elapsed-format: "3 mins ago", "2 days ago".
28 static string16 TimeElapsed(const base::TimeDelta& delta);
30 // Returns times in remaining-format: "3 mins left", "2 days left".
31 static string16 TimeRemaining(const base::TimeDelta& delta);
33 // Returns times in remaining-long-format: "3 minutes left", "2 days left".
34 // Currently, this only affects the minutes in long format, the rest
35 // of the time units are formatted the same as TimeRemaining does.
36 static string16 TimeRemainingLong(const base::TimeDelta& delta);
38 // Returns times in short-format: "3 mins", "2 days".
39 static string16 TimeRemainingShort(const base::TimeDelta& delta);
41 // Return times in long-format: "2 hours", "25 minutes".
42 static string16 TimeDurationLong(const base::TimeDelta& delta);
44 // For displaying a relative time in the past. This method returns either
45 // "Today", "Yesterday", or an empty string if it's older than that. Returns
46 // the empty string for days in the future.
48 // TODO(brettw): This should be able to handle days in the future like
50 // TODO(tc): This should be able to do things like "Last week". This
51 // requires handling singluar/plural for all languages.
53 // The second parameter is optional, it is midnight of "Now" for relative day
54 // computations: Time::Now().LocalMidnight()
55 // If NULL, the current day's midnight will be retrieved, which can be
56 // slow. If many items are being processed, it is best to get the current
57 // time once at the beginning and pass it for each computation.
58 static string16 RelativeDate(const base::Time& time,
59 const base::Time* optional_midnight_today);
62 DISALLOW_IMPLICIT_CONSTRUCTORS(TimeFormat);
67 #endif // UI_BASE_L10N_TIME_FORMAT_H_