| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| part of app; |
| |
| class Utils { |
| static String formatPercent(num a, num total) { |
| var percent = 100.0 * (a / total); |
| return '${percent.toStringAsFixed(2)}%'; |
| } |
| |
| static String zeroPad(int value, int pad) { |
| String prefix = ""; |
| while (pad > 1) { |
| int pow10 = pow(10, pad - 1); |
| if (value < pow10) { |
| prefix = prefix + "0"; |
| } |
| pad--; |
| } |
| return "${prefix}${value}"; |
| } |
| |
| static String formatCommaSeparated(int v) { |
| const COMMA_EVERY = 1000; |
| if (v < COMMA_EVERY) { |
| return v.toString(); |
| } |
| var mod = v % COMMA_EVERY; |
| v ~/= COMMA_EVERY; |
| var r = '${zeroPad(mod, 3)}'; |
| while (v > COMMA_EVERY) { |
| mod = v % COMMA_EVERY; |
| r = '${zeroPad(mod, 3)},$r'; |
| v ~/= COMMA_EVERY; |
| } |
| if (v != 0) { |
| r = '$v,$r'; |
| } |
| return r; |
| } |
| |
| static String formatTimePrecise(double time) { |
| if (time == null) { |
| return "-"; |
| } |
| const millisPerHour = 60 * 60 * 1000; |
| const millisPerMinute = 60 * 1000; |
| const millisPerSecond = 1000; |
| |
| var millis = (time * millisPerSecond).round(); |
| |
| var hours = millis ~/ millisPerHour; |
| millis = millis % millisPerHour; |
| |
| var minutes = millis ~/ millisPerMinute; |
| millis = millis % millisPerMinute; |
| |
| var seconds = millis ~/ millisPerSecond; |
| millis = millis % millisPerSecond; |
| |
| if (hours > 0) { |
| return ("${zeroPad(hours,2)}" |
| ":${zeroPad(minutes,2)}" |
| ":${zeroPad(seconds,2)}" |
| ".${zeroPad(millis,3)}"); |
| } else { |
| return ("${zeroPad(minutes,2)}" |
| ":${zeroPad(seconds,2)}" |
| ".${zeroPad(millis,3)}"); |
| } |
| } |
| |
| static String formatSize(int bytes) { |
| const int digits = 1; |
| const int bytesPerKB = 1024; |
| const int bytesPerMB = 1024 * bytesPerKB; |
| const int bytesPerGB = 1024 * bytesPerMB; |
| const int bytesPerTB = 1024 * bytesPerGB; |
| |
| if (bytes < bytesPerKB) { |
| return "${bytes}B"; |
| } else if (bytes < bytesPerMB) { |
| return "${(bytes / bytesPerKB).toStringAsFixed(digits)}KB"; |
| } else if (bytes < bytesPerGB) { |
| return "${(bytes / bytesPerMB).toStringAsFixed(digits)}MB"; |
| } else if (bytes < bytesPerTB) { |
| return "${(bytes / bytesPerGB).toStringAsFixed(digits)}GB"; |
| } else { |
| return "${(bytes / bytesPerTB).toStringAsFixed(digits)}TB"; |
| } |
| } |
| |
| static String formatTime(double time) { |
| if (time == null) { |
| return "-"; |
| } |
| const millisPerHour = 60 * 60 * 1000; |
| const millisPerMinute = 60 * 1000; |
| const millisPerSecond = 1000; |
| |
| var millis = (time * millisPerSecond).round(); |
| |
| var hours = millis ~/ millisPerHour; |
| millis = millis % millisPerHour; |
| |
| var minutes = millis ~/ millisPerMinute; |
| millis = millis % millisPerMinute; |
| |
| var seconds = millis ~/ millisPerSecond; |
| |
| StringBuffer out = new StringBuffer(); |
| if (hours != 0) { |
| return '${hours}h ${minutes}m ${seconds}s'; |
| } |
| if (minutes != 0) { |
| return '${minutes}m ${seconds}s'; |
| } |
| return '${seconds}s'; |
| } |
| |
| static String formatSeconds(double x) { |
| return x.toStringAsFixed(2); |
| } |
| } |