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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.systemui.statusbar.policy;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.os.Bundle;
     24 import android.text.Spannable;
     25 import android.text.SpannableStringBuilder;
     26 import android.text.format.DateFormat;
     27 import android.text.style.CharacterStyle;
     28 import android.text.style.RelativeSizeSpan;
     29 import android.util.AttributeSet;
     30 import android.widget.TextView;
     31 
     32 import com.android.systemui.DemoMode;
     33 
     34 import java.text.SimpleDateFormat;
     35 import java.util.Calendar;
     36 import java.util.Locale;
     37 import java.util.TimeZone;
     38 
     39 import libcore.icu.LocaleData;
     40 
     41 /**
     42  * Digital clock for the status bar.
     43  */
     44 public class Clock extends TextView implements DemoMode {
     45     private boolean mAttached;
     46     private Calendar mCalendar;
     47     private String mClockFormatString;
     48     private SimpleDateFormat mClockFormat;
     49     private Locale mLocale;
     50 
     51     private static final int AM_PM_STYLE_NORMAL  = 0;
     52     private static final int AM_PM_STYLE_SMALL   = 1;
     53     private static final int AM_PM_STYLE_GONE    = 2;
     54 
     55     private static final int AM_PM_STYLE = AM_PM_STYLE_GONE;
     56 
     57     public Clock(Context context) {
     58         this(context, null);
     59     }
     60 
     61     public Clock(Context context, AttributeSet attrs) {
     62         this(context, attrs, 0);
     63     }
     64 
     65     public Clock(Context context, AttributeSet attrs, int defStyle) {
     66         super(context, attrs, defStyle);
     67     }
     68 
     69     @Override
     70     protected void onAttachedToWindow() {
     71         super.onAttachedToWindow();
     72 
     73         if (!mAttached) {
     74             mAttached = true;
     75             IntentFilter filter = new IntentFilter();
     76 
     77             filter.addAction(Intent.ACTION_TIME_TICK);
     78             filter.addAction(Intent.ACTION_TIME_CHANGED);
     79             filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
     80             filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
     81             filter.addAction(Intent.ACTION_USER_SWITCHED);
     82 
     83             getContext().registerReceiver(mIntentReceiver, filter, null, getHandler());
     84         }
     85 
     86         // NOTE: It's safe to do these after registering the receiver since the receiver always runs
     87         // in the main thread, therefore the receiver can't run before this method returns.
     88 
     89         // The time zone may have changed while the receiver wasn't registered, so update the Time
     90         mCalendar = Calendar.getInstance(TimeZone.getDefault());
     91 
     92         // Make sure we update to the current time
     93         updateClock();
     94     }
     95 
     96     @Override
     97     protected void onDetachedFromWindow() {
     98         super.onDetachedFromWindow();
     99         if (mAttached) {
    100             getContext().unregisterReceiver(mIntentReceiver);
    101             mAttached = false;
    102         }
    103     }
    104 
    105     private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
    106         @Override
    107         public void onReceive(Context context, Intent intent) {
    108             String action = intent.getAction();
    109             if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) {
    110                 String tz = intent.getStringExtra("time-zone");
    111                 mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz));
    112                 if (mClockFormat != null) {
    113                     mClockFormat.setTimeZone(mCalendar.getTimeZone());
    114                 }
    115             } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
    116                 final Locale newLocale = getResources().getConfiguration().locale;
    117                 if (! newLocale.equals(mLocale)) {
    118                     mLocale = newLocale;
    119                     mClockFormatString = ""; // force refresh
    120                 }
    121             }
    122             updateClock();
    123         }
    124     };
    125 
    126     final void updateClock() {
    127         if (mDemoMode) return;
    128         mCalendar.setTimeInMillis(System.currentTimeMillis());
    129         setText(getSmallTime());
    130     }
    131 
    132     private final CharSequence getSmallTime() {
    133         Context context = getContext();
    134         boolean is24 = DateFormat.is24HourFormat(context);
    135         LocaleData d = LocaleData.get(context.getResources().getConfiguration().locale);
    136 
    137         final char MAGIC1 = '\uEF00';
    138         final char MAGIC2 = '\uEF01';
    139 
    140         SimpleDateFormat sdf;
    141         String format = is24 ? d.timeFormat24 : d.timeFormat12;
    142         if (!format.equals(mClockFormatString)) {
    143             /*
    144              * Search for an unquoted "a" in the format string, so we can
    145              * add dummy characters around it to let us find it again after
    146              * formatting and change its size.
    147              */
    148             if (AM_PM_STYLE != AM_PM_STYLE_NORMAL) {
    149                 int a = -1;
    150                 boolean quoted = false;
    151                 for (int i = 0; i < format.length(); i++) {
    152                     char c = format.charAt(i);
    153 
    154                     if (c == '\'') {
    155                         quoted = !quoted;
    156                     }
    157                     if (!quoted && c == 'a') {
    158                         a = i;
    159                         break;
    160                     }
    161                 }
    162 
    163                 if (a >= 0) {
    164                     // Move a back so any whitespace before AM/PM is also in the alternate size.
    165                     final int b = a;
    166                     while (a > 0 && Character.isWhitespace(format.charAt(a-1))) {
    167                         a--;
    168                     }
    169                     format = format.substring(0, a) + MAGIC1 + format.substring(a, b)
    170                         + "a" + MAGIC2 + format.substring(b + 1);
    171                 }
    172             }
    173             mClockFormat = sdf = new SimpleDateFormat(format);
    174             mClockFormatString = format;
    175         } else {
    176             sdf = mClockFormat;
    177         }
    178         String result = sdf.format(mCalendar.getTime());
    179 
    180         if (AM_PM_STYLE != AM_PM_STYLE_NORMAL) {
    181             int magic1 = result.indexOf(MAGIC1);
    182             int magic2 = result.indexOf(MAGIC2);
    183             if (magic1 >= 0 && magic2 > magic1) {
    184                 SpannableStringBuilder formatted = new SpannableStringBuilder(result);
    185                 if (AM_PM_STYLE == AM_PM_STYLE_GONE) {
    186                     formatted.delete(magic1, magic2+1);
    187                 } else {
    188                     if (AM_PM_STYLE == AM_PM_STYLE_SMALL) {
    189                         CharacterStyle style = new RelativeSizeSpan(0.7f);
    190                         formatted.setSpan(style, magic1, magic2,
    191                                           Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
    192                     }
    193                     formatted.delete(magic2, magic2 + 1);
    194                     formatted.delete(magic1, magic1 + 1);
    195                 }
    196                 return formatted;
    197             }
    198         }
    199 
    200         return result;
    201 
    202     }
    203 
    204     private boolean mDemoMode;
    205 
    206     @Override
    207     public void dispatchDemoCommand(String command, Bundle args) {
    208         if (!mDemoMode && command.equals(COMMAND_ENTER)) {
    209             mDemoMode = true;
    210         } else if (mDemoMode && command.equals(COMMAND_EXIT)) {
    211             mDemoMode = false;
    212             updateClock();
    213         } else if (mDemoMode && command.equals(COMMAND_CLOCK)) {
    214             String millis = args.getString("millis");
    215             String hhmm = args.getString("hhmm");
    216             if (millis != null) {
    217                 mCalendar.setTimeInMillis(Long.parseLong(millis));
    218             } else if (hhmm != null && hhmm.length() == 4) {
    219                 int hh = Integer.parseInt(hhmm.substring(0, 2));
    220                 int mm = Integer.parseInt(hhmm.substring(2));
    221                 mCalendar.set(Calendar.HOUR, hh);
    222                 mCalendar.set(Calendar.MINUTE, mm);
    223             }
    224             setText(getSmallTime());
    225         }
    226     }
    227 }
    228 
    229