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      1 /*
      2  * Copyright (C) 2014 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 com.example.android.wearable.timer.util;
     18 
     19 /** Helper class to format the timer. Based on com.android.deskclock.timer.CountingTimerView. */
     20 public final class TimerFormat {
     21 
     22     private static final String TWO_DIGITS = "%02d";
     23 
     24     private static final String ONE_DIGIT = "%01d";
     25 
     26     private static final String NEG_TWO_DIGITS = "-%02d";
     27 
     28     private static final String NEG_ONE_DIGIT = "-%01d";
     29 
     30     private static String mHours;
     31 
     32     private static String mMinutes;
     33 
     34     private static String mSeconds;
     35 
     36     private TimerFormat() {
     37 
     38     }
     39 
     40     /**
     41      * Update the time to display. Separates that time into the hours, minutes, seconds.
     42      * Copied and shortened from com.android.deskclock.timer.CountingTimerView.
     43      *
     44      * @param time new time to display - in milliseconds
     45      */
     46     private static void setTime(long time) {
     47         boolean neg = false;
     48         boolean showNeg = false;
     49         String format;
     50         if (time < 0) {
     51             time = -time;
     52             neg = showNeg = true;
     53         }
     54         long seconds = time / 1000;
     55         long hundreds = (time - seconds * 1000) / 10;
     56         long minutes = seconds / 60;
     57         seconds = seconds - minutes * 60;
     58         long hours = minutes / 60;
     59         minutes = minutes - hours * 60;
     60         if (hours > 999) {
     61             hours = 0;
     62         }
     63         // The time  can be between 0 and -1 seconds, but the "truncated" equivalent time of hours
     64         // and minutes and seconds could be zero, so since we do not show fractions of seconds
     65         // when counting down, do not show the minus sign.
     66         if (hours == 0 && minutes == 0 && seconds == 0) {
     67             showNeg = false;
     68         }
     69 
     70         // Normalize and check if it is 'time' to invalidate
     71         if (!neg && hundreds != 0) {
     72             seconds++;
     73             if (seconds == 60) {
     74                 seconds = 0;
     75                 minutes++;
     76                 if (minutes == 60) {
     77                     minutes = 0;
     78                     hours++;
     79                 }
     80             }
     81         }
     82 
     83         // Hours may be empty
     84         if (hours >= 10) {
     85             format = showNeg ? NEG_TWO_DIGITS : TWO_DIGITS;
     86             mHours = String.format(format, hours);
     87         } else if (hours > 0) {
     88             format = showNeg ? NEG_ONE_DIGIT : ONE_DIGIT;
     89             mHours = String.format(format, hours);
     90         } else {
     91             mHours = null;
     92         }
     93 
     94         // Minutes are never empty and when hours are non-empty, must be two digits
     95         if (minutes >= 10 || hours > 0) {
     96             format = (showNeg && hours == 0) ? NEG_TWO_DIGITS : TWO_DIGITS;
     97             mMinutes = String.format(format, minutes);
     98         } else {
     99             format = (showNeg && hours == 0) ? NEG_ONE_DIGIT : ONE_DIGIT;
    100             mMinutes = String.format(format, minutes);
    101         }
    102 
    103         // Seconds are always two digits
    104         mSeconds = String.format(TWO_DIGITS, seconds);
    105     }
    106 
    107     /**
    108      * Based on com.android.deskclock.timer.CountingTimerView.
    109      *
    110      * @param time the time to format.
    111      * @return nicely formatted time.
    112      */
    113     public static String getTimeString(long time) {
    114         setTime(time);
    115         if (mHours == null) {
    116             return String.format("%s:%s", mMinutes, mSeconds);
    117         }
    118         return String.format("%s:%s:%s", mHours, mMinutes, mSeconds);
    119 
    120     }
    121 }
    122