| 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.support.v2.util; |
| 18 | |
| 19 | import java.io.PrintWriter; |
| 20 | |
| 21 | /** |
| 22 | * Useful time utilities that are not available on all versions of Android. |
| 23 | */ |
| 24 | public class TimeUtils { |
| 25 | /** @hide Field length that can hold 999 days of time */ |
| 26 | public static final int HUNDRED_DAY_FIELD_LEN = 19; |
| 27 | |
| 28 | private static final int SECONDS_PER_MINUTE = 60; |
| 29 | private static final int SECONDS_PER_HOUR = 60 * 60; |
| 30 | private static final int SECONDS_PER_DAY = 24 * 60 * 60; |
| 31 | |
| 32 | private static final Object sFormatSync = new Object(); |
| 33 | private static char[] sFormatStr = new char[HUNDRED_DAY_FIELD_LEN+5]; |
| 34 | |
| 35 | static private int accumField(int amt, int suffix, boolean always, int zeropad) { |
| 36 | if (amt > 99 || (always && zeropad >= 3)) { |
| 37 | return 3+suffix; |
| 38 | } |
| 39 | if (amt > 9 || (always && zeropad >= 2)) { |
| 40 | return 2+suffix; |
| 41 | } |
| 42 | if (always || amt > 0) { |
| 43 | return 1+suffix; |
| 44 | } |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | static private int printField(char[] formatStr, int amt, char suffix, int pos, |
| 49 | boolean always, int zeropad) { |
| 50 | if (always || amt > 0) { |
| 51 | final int startPos = pos; |
| 52 | if ((always && zeropad >= 3) || amt > 99) { |
| 53 | int dig = amt/100; |
| 54 | formatStr[pos] = (char)(dig + '0'); |
| 55 | pos++; |
| 56 | amt -= (dig*100); |
| 57 | } |
| 58 | if ((always && zeropad >= 2) || amt > 9 || startPos != pos) { |
| 59 | int dig = amt/10; |
| 60 | formatStr[pos] = (char)(dig + '0'); |
| 61 | pos++; |
| 62 | amt -= (dig*10); |
| 63 | } |
| 64 | formatStr[pos] = (char)(amt + '0'); |
| 65 | pos++; |
| 66 | formatStr[pos] = suffix; |
| 67 | pos++; |
| 68 | } |
| 69 | return pos; |
| 70 | } |
| 71 | |
| 72 | private static int formatDurationLocked(long duration, int fieldLen) { |
| 73 | if (sFormatStr.length < fieldLen) { |
| 74 | sFormatStr = new char[fieldLen]; |
| 75 | } |
| 76 | |
| 77 | char[] formatStr = sFormatStr; |
| 78 | |
| 79 | if (duration == 0) { |
| 80 | int pos = 0; |
| 81 | fieldLen -= 1; |
| 82 | while (pos < fieldLen) { |
| 83 | formatStr[pos] = ' '; |
| 84 | } |
| 85 | formatStr[pos] = '0'; |
| 86 | return pos+1; |
| 87 | } |
| 88 | |
| 89 | char prefix; |
| 90 | if (duration > 0) { |
| 91 | prefix = '+'; |
| 92 | } else { |
| 93 | prefix = '-'; |
| 94 | duration = -duration; |
| 95 | } |
| 96 | |
| 97 | int millis = (int)(duration%1000); |
| 98 | int seconds = (int) Math.floor(duration / 1000); |
| 99 | int days = 0, hours = 0, minutes = 0; |
| 100 | |
| 101 | if (seconds > SECONDS_PER_DAY) { |
| 102 | days = seconds / SECONDS_PER_DAY; |
| 103 | seconds -= days * SECONDS_PER_DAY; |
| 104 | } |
| 105 | if (seconds > SECONDS_PER_HOUR) { |
| 106 | hours = seconds / SECONDS_PER_HOUR; |
| 107 | seconds -= hours * SECONDS_PER_HOUR; |
| 108 | } |
| 109 | if (seconds > SECONDS_PER_MINUTE) { |
| 110 | minutes = seconds / SECONDS_PER_MINUTE; |
| 111 | seconds -= minutes * SECONDS_PER_MINUTE; |
| 112 | } |
| 113 | |
| 114 | int pos = 0; |
| 115 | |
| 116 | if (fieldLen != 0) { |
| 117 | int myLen = accumField(days, 1, false, 0); |
| 118 | myLen += accumField(hours, 1, myLen > 0, 2); |
| 119 | myLen += accumField(minutes, 1, myLen > 0, 2); |
| 120 | myLen += accumField(seconds, 1, myLen > 0, 2); |
| 121 | myLen += accumField(millis, 2, true, myLen > 0 ? 3 : 0) + 1; |
| 122 | while (myLen < fieldLen) { |
| 123 | formatStr[pos] = ' '; |
| 124 | pos++; |
| 125 | myLen++; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | formatStr[pos] = prefix; |
| 130 | pos++; |
| 131 | |
| 132 | int start = pos; |
| 133 | boolean zeropad = fieldLen != 0; |
| 134 | pos = printField(formatStr, days, 'd', pos, false, 0); |
| 135 | pos = printField(formatStr, hours, 'h', pos, pos != start, zeropad ? 2 : 0); |
| 136 | pos = printField(formatStr, minutes, 'm', pos, pos != start, zeropad ? 2 : 0); |
| 137 | pos = printField(formatStr, seconds, 's', pos, pos != start, zeropad ? 2 : 0); |
| 138 | pos = printField(formatStr, millis, 'm', pos, true, (zeropad && pos != start) ? 3 : 0); |
| 139 | formatStr[pos] = 's'; |
| 140 | return pos + 1; |
| 141 | } |
| 142 | |
| 143 | /** @hide Just for debugging; not internationalized. */ |
| 144 | public static void formatDuration(long duration, StringBuilder builder) { |
| 145 | synchronized (sFormatSync) { |
| 146 | int len = formatDurationLocked(duration, 0); |
| 147 | builder.append(sFormatStr, 0, len); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /** @hide Just for debugging; not internationalized. */ |
| 152 | public static void formatDuration(long duration, PrintWriter pw, int fieldLen) { |
| 153 | synchronized (sFormatSync) { |
| 154 | int len = formatDurationLocked(duration, fieldLen); |
| 155 | pw.print(new String(sFormatStr, 0, len)); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | /** @hide Just for debugging; not internationalized. */ |
| 160 | public static void formatDuration(long duration, PrintWriter pw) { |
| 161 | formatDuration(duration, pw, 0); |
| 162 | } |
| 163 | |
| 164 | /** @hide Just for debugging; not internationalized. */ |
| 165 | public static void formatDuration(long time, long now, PrintWriter pw) { |
| 166 | if (time == 0) { |
| 167 | pw.print("--"); |
| 168 | return; |
| 169 | } |
| 170 | formatDuration(time-now, pw, 0); |
| 171 | } |
| 172 | } |