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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_BASE_L10N_TIME_FORMAT_H_ | 5 #ifndef UI_BASE_L10N_TIME_FORMAT_H_ |
| 6 #define UI_BASE_L10N_TIME_FORMAT_H_ | 6 #define UI_BASE_L10N_TIME_FORMAT_H_ |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "base/strings/string16.h" | 9 #include "base/strings/string16.h" |
| 10 #include "ui/base/ui_export.h" | 10 #include "ui/base/ui_export.h" |
| 11 | 11 |
| 12 namespace base { | 12 namespace base { |
| 13 class Time; | 13 class Time; |
| 14 class TimeDelta; | 14 class TimeDelta; |
| 15 } | 15 } |
| 16 | 16 |
| 17 namespace ui { | 17 namespace ui { |
| 18 | 18 |
| 19 // Methods to format time values as strings. | 19 // Methods to format time values as strings. |
| 20 class UI_EXPORT TimeFormat { | 20 class UI_EXPORT TimeFormat { |
| 21 public: | 21 public: |
| 22 // TimeElapsed, TimeRemaining and TimeRemainingShort functions: | 22 // TimeElapsed, TimeRemaining and TimeRemainingShort functions: |
| 23 // These functions return a localized string of approximate time duration. The | 23 // These functions return a localized string of approximate time duration. The |
| 24 // conditions are simpler than PastTime since these functions are used for | 24 // conditions are simpler than PastTime since these functions are used for |
| 25 // in-progress operations and users have different expectations of units. | 25 // in-progress operations and users have different expectations of units. |
| 26 | 26 |
| 27 // Returns times in elapsed-format: "3 mins ago", "2 days ago". | 27 // Returns times in elapsed-format: "3 mins ago", "2 days ago". |
| 28 static string16 TimeElapsed(const base::TimeDelta& delta); | 28 static base::string16 TimeElapsed(const base::TimeDelta& delta); |
| 29 | 29 |
| 30 // Returns times in remaining-format: "3 mins left", "2 days left". | 30 // Returns times in remaining-format: "3 mins left", "2 days left". |
| 31 static string16 TimeRemaining(const base::TimeDelta& delta); | 31 static base::string16 TimeRemaining(const base::TimeDelta& delta); |
| 32 | 32 |
| 33 // Returns times in remaining-long-format: "3 minutes left", "2 days left". | 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 | 34 // Currently, this only affects the minutes in long format, the rest |
| 35 // of the time units are formatted the same as TimeRemaining does. | 35 // of the time units are formatted the same as TimeRemaining does. |
| 36 static string16 TimeRemainingLong(const base::TimeDelta& delta); | 36 static base::string16 TimeRemainingLong(const base::TimeDelta& delta); |
| 37 | 37 |
| 38 // Returns times in short-format: "3 mins", "2 days". | 38 // Returns times in short-format: "3 mins", "2 days". |
| 39 static string16 TimeRemainingShort(const base::TimeDelta& delta); | 39 static base::string16 TimeRemainingShort(const base::TimeDelta& delta); |
| 40 | 40 |
| 41 // Return times in long-format: "2 hours", "25 minutes". | 41 // Return times in long-format: "2 hours", "25 minutes". |
| 42 static string16 TimeDurationLong(const base::TimeDelta& delta); | 42 static base::string16 TimeDurationLong(const base::TimeDelta& delta); |
| 43 | 43 |
| 44 // For displaying a relative time in the past. This method returns either | 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 | 45 // "Today", "Yesterday", or an empty string if it's older than that. Returns |
| 46 // the empty string for days in the future. | 46 // the empty string for days in the future. |
| 47 // | 47 // |
| 48 // TODO(brettw): This should be able to handle days in the future like | 48 // TODO(brettw): This should be able to handle days in the future like |
| 49 // "Tomorrow". | 49 // "Tomorrow". |
| 50 // TODO(tc): This should be able to do things like "Last week". This | 50 // TODO(tc): This should be able to do things like "Last week". This |
| 51 // requires handling singluar/plural for all languages. | 51 // requires handling singluar/plural for all languages. |
| 52 // | 52 // |
| 53 // The second parameter is optional, it is midnight of "Now" for relative day | 53 // The second parameter is optional, it is midnight of "Now" for relative day |
| 54 // computations: Time::Now().LocalMidnight() | 54 // computations: Time::Now().LocalMidnight() |
| 55 // If NULL, the current day's midnight will be retrieved, which can be | 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 | 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. | 57 // time once at the beginning and pass it for each computation. |
| 58 static string16 RelativeDate(const base::Time& time, | 58 static base::string16 RelativeDate(const base::Time& time, |
| 59 const base::Time* optional_midnight_today); | 59 const base::Time* optional_midnight_today); |
| 60 | 60 |
| 61 private: | 61 private: |
| 62 DISALLOW_IMPLICIT_CONSTRUCTORS(TimeFormat); | 62 DISALLOW_IMPLICIT_CONSTRUCTORS(TimeFormat); |
| 63 }; | 63 }; |
| 64 | 64 |
| 65 } // namespace ui | 65 } // namespace ui |
| 66 | 66 |
| 67 #endif // UI_BASE_L10N_TIME_FORMAT_H_ | 67 #endif // UI_BASE_L10N_TIME_FORMAT_H_ |
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