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      1 /*
      2  * Copyright (C) 2006 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.android.traceview;
     18 
     19 import java.text.DecimalFormat;
     20 
     21 // This should be a singleton.
     22 public class TraceUnits {
     23 
     24     private TimeScale mTimeScale = TimeScale.MicroSeconds;
     25     private double mScale = 1.0;
     26     DecimalFormat mFormatter = new DecimalFormat();
     27 
     28     public double getScaledValue(long value) {
     29         return value * mScale;
     30     }
     31 
     32     public double getScaledValue(double value) {
     33         return value * mScale;
     34     }
     35 
     36     public String valueOf(long value) {
     37         return valueOf((double) value);
     38     }
     39 
     40     public String valueOf(double value) {
     41         String pattern;
     42         double scaled = value * mScale;
     43         if ((int) scaled == scaled)
     44             pattern = "###,###";
     45         else
     46             pattern = "###,###.###";
     47         mFormatter.applyPattern(pattern);
     48         return mFormatter.format(scaled);
     49     }
     50 
     51     public String labelledString(double value) {
     52         String units = label();
     53         String num = valueOf(value);
     54         return String.format("%s: %s", units, num);
     55     }
     56 
     57     public String labelledString(long value) {
     58         return labelledString((double) value);
     59     }
     60 
     61     public String label() {
     62         if (mScale == 1.0)
     63             return "usec";
     64         if (mScale == 0.001)
     65             return "msec";
     66         if (mScale == 0.000001)
     67             return "sec";
     68         return null;
     69     }
     70 
     71     public void setTimeScale(TimeScale val) {
     72         mTimeScale = val;
     73         switch (val) {
     74         case Seconds:
     75             mScale = 0.000001;
     76             break;
     77         case MilliSeconds:
     78             mScale = 0.001;
     79             break;
     80         case MicroSeconds:
     81             mScale = 1.0;
     82             break;
     83         }
     84     }
     85 
     86     public TimeScale getTimeScale() {
     87         return mTimeScale;
     88     }
     89 
     90     public enum TimeScale {
     91         Seconds, MilliSeconds, MicroSeconds
     92     };
     93 }
     94