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 libcore.icu.LocaleData;
20 
21 import android.app.ActivityManager;
22 import android.content.BroadcastReceiver;
23 import android.content.Context;
24 import android.content.Intent;
25 import android.content.IntentFilter;
26 import android.content.res.TypedArray;
27 import android.os.Bundle;
28 import android.os.Handler;
29 import android.os.SystemClock;
30 import android.os.UserHandle;
31 import android.text.Spannable;
32 import android.text.SpannableStringBuilder;
33 import android.text.format.DateFormat;
34 import android.text.style.CharacterStyle;
35 import android.text.style.RelativeSizeSpan;
36 import android.util.ArraySet;
37 import android.util.AttributeSet;
38 import android.view.Display;
39 import android.view.View;
40 import android.widget.TextView;
41 
42 import com.android.systemui.DemoMode;
43 import com.android.systemui.R;
44 import com.android.systemui.statusbar.phone.StatusBarIconController;
45 import com.android.systemui.tuner.TunerService;
46 import com.android.systemui.tuner.TunerService.Tunable;
47 
48 import java.text.SimpleDateFormat;
49 import java.util.Calendar;
50 import java.util.Locale;
51 import java.util.TimeZone;
52 
53 /**
54  * Digital clock for the status bar.
55  */
56 public class Clock extends TextView implements DemoMode, Tunable {
57 
58     public static final String CLOCK_SECONDS = "clock_seconds";
59 
60     private boolean mAttached;
61     private Calendar mCalendar;
62     private String mClockFormatString;
63     private SimpleDateFormat mClockFormat;
64     private SimpleDateFormat mContentDescriptionFormat;
65     private Locale mLocale;
66 
67     private static final int AM_PM_STYLE_NORMAL  = 0;
68     private static final int AM_PM_STYLE_SMALL   = 1;
69     private static final int AM_PM_STYLE_GONE    = 2;
70 
71     private final int mAmPmStyle;
72     private boolean mShowSeconds;
73     private Handler mSecondsHandler;
74 
Clock(Context context)75     public Clock(Context context) {
76         this(context, null);
77     }
78 
Clock(Context context, AttributeSet attrs)79     public Clock(Context context, AttributeSet attrs) {
80         this(context, attrs, 0);
81     }
82 
Clock(Context context, AttributeSet attrs, int defStyle)83     public Clock(Context context, AttributeSet attrs, int defStyle) {
84         super(context, attrs, defStyle);
85         TypedArray a = context.getTheme().obtainStyledAttributes(
86                 attrs,
87                 R.styleable.Clock,
88                 0, 0);
89         try {
90             mAmPmStyle = a.getInt(R.styleable.Clock_amPmStyle, AM_PM_STYLE_GONE);
91         } finally {
92             a.recycle();
93         }
94     }
95 
96     @Override
onAttachedToWindow()97     protected void onAttachedToWindow() {
98         super.onAttachedToWindow();
99 
100         if (!mAttached) {
101             mAttached = true;
102             IntentFilter filter = new IntentFilter();
103 
104             filter.addAction(Intent.ACTION_TIME_TICK);
105             filter.addAction(Intent.ACTION_TIME_CHANGED);
106             filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
107             filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
108             filter.addAction(Intent.ACTION_USER_SWITCHED);
109 
110             getContext().registerReceiverAsUser(mIntentReceiver, UserHandle.ALL, filter,
111                     null, getHandler());
112             TunerService.get(getContext()).addTunable(this, CLOCK_SECONDS,
113                     StatusBarIconController.ICON_BLACKLIST);
114         }
115 
116         // NOTE: It's safe to do these after registering the receiver since the receiver always runs
117         // in the main thread, therefore the receiver can't run before this method returns.
118 
119         // The time zone may have changed while the receiver wasn't registered, so update the Time
120         mCalendar = Calendar.getInstance(TimeZone.getDefault());
121 
122         // Make sure we update to the current time
123         updateClock();
124         updateShowSeconds();
125     }
126 
127     @Override
onDetachedFromWindow()128     protected void onDetachedFromWindow() {
129         super.onDetachedFromWindow();
130         if (mAttached) {
131             getContext().unregisterReceiver(mIntentReceiver);
132             mAttached = false;
133             TunerService.get(getContext()).removeTunable(this);
134         }
135     }
136 
137     private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
138         @Override
139         public void onReceive(Context context, Intent intent) {
140             String action = intent.getAction();
141             if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) {
142                 String tz = intent.getStringExtra("time-zone");
143                 mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz));
144                 if (mClockFormat != null) {
145                     mClockFormat.setTimeZone(mCalendar.getTimeZone());
146                 }
147             } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
148                 final Locale newLocale = getResources().getConfiguration().locale;
149                 if (! newLocale.equals(mLocale)) {
150                     mLocale = newLocale;
151                     mClockFormatString = ""; // force refresh
152                 }
153             }
154             updateClock();
155         }
156     };
157 
updateClock()158     final void updateClock() {
159         if (mDemoMode) return;
160         mCalendar.setTimeInMillis(System.currentTimeMillis());
161         setText(getSmallTime());
162         setContentDescription(mContentDescriptionFormat.format(mCalendar.getTime()));
163     }
164 
165     @Override
onTuningChanged(String key, String newValue)166     public void onTuningChanged(String key, String newValue) {
167         if (CLOCK_SECONDS.equals(key)) {
168             mShowSeconds = newValue != null && Integer.parseInt(newValue) != 0;
169             updateShowSeconds();
170         } else if (StatusBarIconController.ICON_BLACKLIST.equals(key)) {
171             ArraySet<String> list = StatusBarIconController.getIconBlacklist(newValue);
172             setVisibility(list.contains("clock") ? View.GONE : View.VISIBLE);
173         }
174     }
175 
updateShowSeconds()176     private void updateShowSeconds() {
177         if (mShowSeconds) {
178             // Wait until we have a display to start trying to show seconds.
179             if (mSecondsHandler == null && getDisplay() != null) {
180                 mSecondsHandler = new Handler();
181                 if (getDisplay().getState() == Display.STATE_ON) {
182                     mSecondsHandler.postAtTime(mSecondTick,
183                             SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
184                 }
185                 IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
186                 filter.addAction(Intent.ACTION_SCREEN_ON);
187                 mContext.registerReceiver(mScreenReceiver, filter);
188             }
189         } else {
190             if (mSecondsHandler != null) {
191                 mContext.unregisterReceiver(mScreenReceiver);
192                 mSecondsHandler.removeCallbacks(mSecondTick);
193                 mSecondsHandler = null;
194                 updateClock();
195             }
196         }
197     }
198 
getSmallTime()199     private final CharSequence getSmallTime() {
200         Context context = getContext();
201         boolean is24 = DateFormat.is24HourFormat(context, ActivityManager.getCurrentUser());
202         LocaleData d = LocaleData.get(context.getResources().getConfiguration().locale);
203 
204         final char MAGIC1 = '\uEF00';
205         final char MAGIC2 = '\uEF01';
206 
207         SimpleDateFormat sdf;
208         String format = mShowSeconds
209                 ? is24 ? d.timeFormat_Hms : d.timeFormat_hms
210                 : is24 ? d.timeFormat_Hm : d.timeFormat_hm;
211         if (!format.equals(mClockFormatString)) {
212             mContentDescriptionFormat = new SimpleDateFormat(format);
213             /*
214              * Search for an unquoted "a" in the format string, so we can
215              * add dummy characters around it to let us find it again after
216              * formatting and change its size.
217              */
218             if (mAmPmStyle != AM_PM_STYLE_NORMAL) {
219                 int a = -1;
220                 boolean quoted = false;
221                 for (int i = 0; i < format.length(); i++) {
222                     char c = format.charAt(i);
223 
224                     if (c == '\'') {
225                         quoted = !quoted;
226                     }
227                     if (!quoted && c == 'a') {
228                         a = i;
229                         break;
230                     }
231                 }
232 
233                 if (a >= 0) {
234                     // Move a back so any whitespace before AM/PM is also in the alternate size.
235                     final int b = a;
236                     while (a > 0 && Character.isWhitespace(format.charAt(a-1))) {
237                         a--;
238                     }
239                     format = format.substring(0, a) + MAGIC1 + format.substring(a, b)
240                         + "a" + MAGIC2 + format.substring(b + 1);
241                 }
242             }
243             mClockFormat = sdf = new SimpleDateFormat(format);
244             mClockFormatString = format;
245         } else {
246             sdf = mClockFormat;
247         }
248         String result = sdf.format(mCalendar.getTime());
249 
250         if (mAmPmStyle != AM_PM_STYLE_NORMAL) {
251             int magic1 = result.indexOf(MAGIC1);
252             int magic2 = result.indexOf(MAGIC2);
253             if (magic1 >= 0 && magic2 > magic1) {
254                 SpannableStringBuilder formatted = new SpannableStringBuilder(result);
255                 if (mAmPmStyle == AM_PM_STYLE_GONE) {
256                     formatted.delete(magic1, magic2+1);
257                 } else {
258                     if (mAmPmStyle == AM_PM_STYLE_SMALL) {
259                         CharacterStyle style = new RelativeSizeSpan(0.7f);
260                         formatted.setSpan(style, magic1, magic2,
261                                           Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
262                     }
263                     formatted.delete(magic2, magic2 + 1);
264                     formatted.delete(magic1, magic1 + 1);
265                 }
266                 return formatted;
267             }
268         }
269 
270         return result;
271 
272     }
273 
274     private boolean mDemoMode;
275 
276     @Override
dispatchDemoCommand(String command, Bundle args)277     public void dispatchDemoCommand(String command, Bundle args) {
278         if (!mDemoMode && command.equals(COMMAND_ENTER)) {
279             mDemoMode = true;
280         } else if (mDemoMode && command.equals(COMMAND_EXIT)) {
281             mDemoMode = false;
282             updateClock();
283         } else if (mDemoMode && command.equals(COMMAND_CLOCK)) {
284             String millis = args.getString("millis");
285             String hhmm = args.getString("hhmm");
286             if (millis != null) {
287                 mCalendar.setTimeInMillis(Long.parseLong(millis));
288             } else if (hhmm != null && hhmm.length() == 4) {
289                 int hh = Integer.parseInt(hhmm.substring(0, 2));
290                 int mm = Integer.parseInt(hhmm.substring(2));
291                 boolean is24 = DateFormat.is24HourFormat(
292                         getContext(), ActivityManager.getCurrentUser());
293                 if (is24) {
294                     mCalendar.set(Calendar.HOUR_OF_DAY, hh);
295                 } else {
296                     mCalendar.set(Calendar.HOUR, hh);
297                 }
298                 mCalendar.set(Calendar.MINUTE, mm);
299             }
300             setText(getSmallTime());
301             setContentDescription(mContentDescriptionFormat.format(mCalendar.getTime()));
302         }
303     }
304 
305     private final BroadcastReceiver mScreenReceiver = new BroadcastReceiver() {
306         @Override
307         public void onReceive(Context context, Intent intent) {
308             String action = intent.getAction();
309             if (Intent.ACTION_SCREEN_OFF.equals(action)) {
310                 if (mSecondsHandler != null) {
311                     mSecondsHandler.removeCallbacks(mSecondTick);
312                 }
313             } else if (Intent.ACTION_SCREEN_ON.equals(action)) {
314                 if (mSecondsHandler != null) {
315                     mSecondsHandler.postAtTime(mSecondTick,
316                             SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
317                 }
318             }
319         }
320     };
321 
322     private final Runnable mSecondTick = new Runnable() {
323         @Override
324         public void run() {
325             if (mCalendar != null) {
326                 updateClock();
327             }
328             mSecondsHandler.postAtTime(this, SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
329         }
330     };
331 }
332 
333