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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.content.res.TypedArray;
     24 import android.os.Bundle;
     25 import android.text.Spannable;
     26 import android.text.SpannableStringBuilder;
     27 import android.text.format.DateFormat;
     28 import android.text.style.CharacterStyle;
     29 import android.text.style.RelativeSizeSpan;
     30 import android.util.AttributeSet;
     31 import android.widget.TextView;
     32 
     33 import com.android.systemui.DemoMode;
     34 import com.android.systemui.R;
     35 
     36 import java.text.SimpleDateFormat;
     37 import java.util.Calendar;
     38 import java.util.Locale;
     39 import java.util.TimeZone;
     40 
     41 import libcore.icu.LocaleData;
     42 
     43 /**
     44  * Digital clock for the status bar.
     45  */
     46 public class Clock extends TextView implements DemoMode {
     47     private boolean mAttached;
     48     private Calendar mCalendar;
     49     private String mClockFormatString;
     50     private SimpleDateFormat mClockFormat;
     51     private Locale mLocale;
     52 
     53     private static final int AM_PM_STYLE_NORMAL  = 0;
     54     private static final int AM_PM_STYLE_SMALL   = 1;
     55     private static final int AM_PM_STYLE_GONE    = 2;
     56 
     57     private final int mAmPmStyle;
     58 
     59     public Clock(Context context) {
     60         this(context, null);
     61     }
     62 
     63     public Clock(Context context, AttributeSet attrs) {
     64         this(context, attrs, 0);
     65     }
     66 
     67     public Clock(Context context, AttributeSet attrs, int defStyle) {
     68         super(context, attrs, defStyle);
     69         TypedArray a = context.getTheme().obtainStyledAttributes(
     70                 attrs,
     71                 R.styleable.Clock,
     72                 0, 0);
     73         try {
     74             mAmPmStyle = a.getInt(R.styleable.Clock_amPmStyle, AM_PM_STYLE_GONE);
     75         } finally {
     76             a.recycle();
     77         }
     78     }
     79 
     80     @Override
     81     protected void onAttachedToWindow() {
     82         super.onAttachedToWindow();
     83 
     84         if (!mAttached) {
     85             mAttached = true;
     86             IntentFilter filter = new IntentFilter();
     87 
     88             filter.addAction(Intent.ACTION_TIME_TICK);
     89             filter.addAction(Intent.ACTION_TIME_CHANGED);
     90             filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
     91             filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
     92             filter.addAction(Intent.ACTION_USER_SWITCHED);
     93 
     94             getContext().registerReceiver(mIntentReceiver, filter, null, getHandler());
     95         }
     96 
     97         // NOTE: It's safe to do these after registering the receiver since the receiver always runs
     98         // in the main thread, therefore the receiver can't run before this method returns.
     99 
    100         // The time zone may have changed while the receiver wasn't registered, so update the Time
    101         mCalendar = Calendar.getInstance(TimeZone.getDefault());
    102 
    103         // Make sure we update to the current time
    104         updateClock();
    105     }
    106 
    107     @Override
    108     protected void onDetachedFromWindow() {
    109         super.onDetachedFromWindow();
    110         if (mAttached) {
    111             getContext().unregisterReceiver(mIntentReceiver);
    112             mAttached = false;
    113         }
    114     }
    115 
    116     private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
    117         @Override
    118         public void onReceive(Context context, Intent intent) {
    119             String action = intent.getAction();
    120             if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) {
    121                 String tz = intent.getStringExtra("time-zone");
    122                 mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz));
    123                 if (mClockFormat != null) {
    124                     mClockFormat.setTimeZone(mCalendar.getTimeZone());
    125                 }
    126             } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
    127                 final Locale newLocale = getResources().getConfiguration().locale;
    128                 if (! newLocale.equals(mLocale)) {
    129                     mLocale = newLocale;
    130                     mClockFormatString = ""; // force refresh
    131                 }
    132             }
    133             updateClock();
    134         }
    135     };
    136 
    137     final void updateClock() {
    138         if (mDemoMode) return;
    139         mCalendar.setTimeInMillis(System.currentTimeMillis());
    140         setText(getSmallTime());
    141     }
    142 
    143     private final CharSequence getSmallTime() {
    144         Context context = getContext();
    145         boolean is24 = DateFormat.is24HourFormat(context);
    146         LocaleData d = LocaleData.get(context.getResources().getConfiguration().locale);
    147 
    148         final char MAGIC1 = '\uEF00';
    149         final char MAGIC2 = '\uEF01';
    150 
    151         SimpleDateFormat sdf;
    152         String format = is24 ? d.timeFormat24 : d.timeFormat12;
    153         if (!format.equals(mClockFormatString)) {
    154             /*
    155              * Search for an unquoted "a" in the format string, so we can
    156              * add dummy characters around it to let us find it again after
    157              * formatting and change its size.
    158              */
    159             if (mAmPmStyle != AM_PM_STYLE_NORMAL) {
    160                 int a = -1;
    161                 boolean quoted = false;
    162                 for (int i = 0; i < format.length(); i++) {
    163                     char c = format.charAt(i);
    164 
    165                     if (c == '\'') {
    166                         quoted = !quoted;
    167                     }
    168                     if (!quoted && c == 'a') {
    169                         a = i;
    170                         break;
    171                     }
    172                 }
    173 
    174                 if (a >= 0) {
    175                     // Move a back so any whitespace before AM/PM is also in the alternate size.
    176                     final int b = a;
    177                     while (a > 0 && Character.isWhitespace(format.charAt(a-1))) {
    178                         a--;
    179                     }
    180                     format = format.substring(0, a) + MAGIC1 + format.substring(a, b)
    181                         + "a" + MAGIC2 + format.substring(b + 1);
    182                 }
    183             }
    184             mClockFormat = sdf = new SimpleDateFormat(format);
    185             mClockFormatString = format;
    186         } else {
    187             sdf = mClockFormat;
    188         }
    189         String result = sdf.format(mCalendar.getTime());
    190 
    191         if (mAmPmStyle != AM_PM_STYLE_NORMAL) {
    192             int magic1 = result.indexOf(MAGIC1);
    193             int magic2 = result.indexOf(MAGIC2);
    194             if (magic1 >= 0 && magic2 > magic1) {
    195                 SpannableStringBuilder formatted = new SpannableStringBuilder(result);
    196                 if (mAmPmStyle == AM_PM_STYLE_GONE) {
    197                     formatted.delete(magic1, magic2+1);
    198                 } else {
    199                     if (mAmPmStyle == AM_PM_STYLE_SMALL) {
    200                         CharacterStyle style = new RelativeSizeSpan(0.7f);
    201                         formatted.setSpan(style, magic1, magic2,
    202                                           Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
    203                     }
    204                     formatted.delete(magic2, magic2 + 1);
    205                     formatted.delete(magic1, magic1 + 1);
    206                 }
    207                 return formatted;
    208             }
    209         }
    210 
    211         return result;
    212 
    213     }
    214 
    215     private boolean mDemoMode;
    216 
    217     @Override
    218     public void dispatchDemoCommand(String command, Bundle args) {
    219         if (!mDemoMode && command.equals(COMMAND_ENTER)) {
    220             mDemoMode = true;
    221         } else if (mDemoMode && command.equals(COMMAND_EXIT)) {
    222             mDemoMode = false;
    223             updateClock();
    224         } else if (mDemoMode && command.equals(COMMAND_CLOCK)) {
    225             String millis = args.getString("millis");
    226             String hhmm = args.getString("hhmm");
    227             if (millis != null) {
    228                 mCalendar.setTimeInMillis(Long.parseLong(millis));
    229             } else if (hhmm != null && hhmm.length() == 4) {
    230                 int hh = Integer.parseInt(hhmm.substring(0, 2));
    231                 int mm = Integer.parseInt(hhmm.substring(2));
    232                 mCalendar.set(Calendar.HOUR, hh);
    233                 mCalendar.set(Calendar.MINUTE, mm);
    234             }
    235             setText(getSmallTime());
    236         }
    237     }
    238 }
    239 
    240