1 /*
2  * Copyright (C) 2010 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.settings;
18 
19 import com.android.internal.view.RotationPolicy;
20 import com.android.settings.notification.DropDownPreference;
21 import com.android.settings.notification.DropDownPreference.Callback;
22 import com.android.settings.search.BaseSearchIndexProvider;
23 import com.android.settings.search.Indexable;
24 
25 import static android.provider.Settings.Secure.DOZE_ENABLED;
26 import static android.provider.Settings.Secure.WAKE_GESTURE_ENABLED;
27 import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE;
28 import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
29 import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
30 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
31 
32 import android.app.Activity;
33 import android.app.ActivityManagerNative;
34 import android.app.Dialog;
35 import android.app.admin.DevicePolicyManager;
36 import android.content.ContentResolver;
37 import android.content.Context;
38 import android.content.res.Configuration;
39 import android.content.res.Resources;
40 import android.hardware.Sensor;
41 import android.hardware.SensorManager;
42 import android.os.Build;
43 import android.os.Bundle;
44 import android.os.RemoteException;
45 import android.os.SystemProperties;
46 import android.preference.ListPreference;
47 import android.preference.Preference;
48 import android.preference.Preference.OnPreferenceClickListener;
49 import android.preference.PreferenceScreen;
50 import android.preference.SwitchPreference;
51 import android.provider.SearchIndexableResource;
52 import android.provider.Settings;
53 import android.text.TextUtils;
54 import android.util.Log;
55 
56 import java.util.ArrayList;
57 import java.util.List;
58 
59 public class DisplaySettings extends SettingsPreferenceFragment implements
60         Preference.OnPreferenceChangeListener, OnPreferenceClickListener, Indexable {
61     private static final String TAG = "DisplaySettings";
62 
63     /** If there is no setting in the provider, use this. */
64     private static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000;
65 
66     private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
67     private static final String KEY_FONT_SIZE = "font_size";
68     private static final String KEY_SCREEN_SAVER = "screensaver";
69     private static final String KEY_LIFT_TO_WAKE = "lift_to_wake";
70     private static final String KEY_DOZE = "doze";
71     private static final String KEY_AUTO_BRIGHTNESS = "auto_brightness";
72     private static final String KEY_AUTO_ROTATE = "auto_rotate";
73 
74     private static final int DLG_GLOBAL_CHANGE_WARNING = 1;
75 
76     private WarnedListPreference mFontSizePref;
77 
78     private final Configuration mCurConfig = new Configuration();
79 
80     private ListPreference mScreenTimeoutPreference;
81     private Preference mScreenSaverPreference;
82     private SwitchPreference mLiftToWakePreference;
83     private SwitchPreference mDozePreference;
84     private SwitchPreference mAutoBrightnessPreference;
85 
86     @Override
onCreate(Bundle savedInstanceState)87     public void onCreate(Bundle savedInstanceState) {
88         super.onCreate(savedInstanceState);
89         final Activity activity = getActivity();
90         final ContentResolver resolver = activity.getContentResolver();
91 
92         addPreferencesFromResource(R.xml.display_settings);
93 
94         mScreenSaverPreference = findPreference(KEY_SCREEN_SAVER);
95         if (mScreenSaverPreference != null
96                 && getResources().getBoolean(
97                         com.android.internal.R.bool.config_dreamsSupported) == false) {
98             getPreferenceScreen().removePreference(mScreenSaverPreference);
99         }
100 
101         mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
102         final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
103                 FALLBACK_SCREEN_TIMEOUT_VALUE);
104         mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
105         mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
106         disableUnusableTimeouts(mScreenTimeoutPreference);
107         updateTimeoutPreferenceDescription(currentTimeout);
108 
109         mFontSizePref = (WarnedListPreference) findPreference(KEY_FONT_SIZE);
110         mFontSizePref.setOnPreferenceChangeListener(this);
111         mFontSizePref.setOnPreferenceClickListener(this);
112 
113         if (isAutomaticBrightnessAvailable(getResources())) {
114             mAutoBrightnessPreference = (SwitchPreference) findPreference(KEY_AUTO_BRIGHTNESS);
115             mAutoBrightnessPreference.setOnPreferenceChangeListener(this);
116         } else {
117             removePreference(KEY_AUTO_BRIGHTNESS);
118         }
119 
120         if (isLiftToWakeAvailable(activity)) {
121             mLiftToWakePreference = (SwitchPreference) findPreference(KEY_LIFT_TO_WAKE);
122             mLiftToWakePreference.setOnPreferenceChangeListener(this);
123         } else {
124             removePreference(KEY_LIFT_TO_WAKE);
125         }
126 
127         if (isDozeAvailable(activity)) {
128             mDozePreference = (SwitchPreference) findPreference(KEY_DOZE);
129             mDozePreference.setOnPreferenceChangeListener(this);
130         } else {
131             removePreference(KEY_DOZE);
132         }
133 
134         if (RotationPolicy.isRotationLockToggleVisible(activity)) {
135             DropDownPreference rotatePreference =
136                     (DropDownPreference) findPreference(KEY_AUTO_ROTATE);
137             rotatePreference.addItem(activity.getString(R.string.display_auto_rotate_rotate),
138                     false);
139             int rotateLockedResourceId;
140             // The following block sets the string used when rotation is locked.
141             // If the device locks specifically to portrait or landscape (rather than current
142             // rotation), then we use a different string to include this information.
143             if (allowAllRotations(activity)) {
144                 rotateLockedResourceId = R.string.display_auto_rotate_stay_in_current;
145             } else {
146                 if (RotationPolicy.getRotationLockOrientation(activity)
147                         == Configuration.ORIENTATION_PORTRAIT) {
148                     rotateLockedResourceId =
149                             R.string.display_auto_rotate_stay_in_portrait;
150                 } else {
151                     rotateLockedResourceId =
152                             R.string.display_auto_rotate_stay_in_landscape;
153                 }
154             }
155             rotatePreference.addItem(activity.getString(rotateLockedResourceId), true);
156             rotatePreference.setSelectedItem(RotationPolicy.isRotationLocked(activity) ?
157                     1 : 0);
158             rotatePreference.setCallback(new Callback() {
159                 @Override
160                 public boolean onItemSelected(int pos, Object value) {
161                     RotationPolicy.setRotationLock(activity, (Boolean) value);
162                     return true;
163                 }
164             });
165         } else {
166             removePreference(KEY_AUTO_ROTATE);
167         }
168     }
169 
allowAllRotations(Context context)170     private static boolean allowAllRotations(Context context) {
171         return Resources.getSystem().getBoolean(
172                 com.android.internal.R.bool.config_allowAllRotations);
173     }
174 
isLiftToWakeAvailable(Context context)175     private static boolean isLiftToWakeAvailable(Context context) {
176         SensorManager sensors = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
177         return sensors != null && sensors.getDefaultSensor(Sensor.TYPE_WAKE_GESTURE) != null;
178     }
179 
isDozeAvailable(Context context)180     private static boolean isDozeAvailable(Context context) {
181         String name = Build.IS_DEBUGGABLE ? SystemProperties.get("debug.doze.component") : null;
182         if (TextUtils.isEmpty(name)) {
183             name = context.getResources().getString(
184                     com.android.internal.R.string.config_dozeComponent);
185         }
186         return !TextUtils.isEmpty(name);
187     }
188 
isAutomaticBrightnessAvailable(Resources res)189     private static boolean isAutomaticBrightnessAvailable(Resources res) {
190         return res.getBoolean(com.android.internal.R.bool.config_automatic_brightness_available);
191     }
192 
updateTimeoutPreferenceDescription(long currentTimeout)193     private void updateTimeoutPreferenceDescription(long currentTimeout) {
194         ListPreference preference = mScreenTimeoutPreference;
195         String summary;
196         if (currentTimeout < 0) {
197             // Unsupported value
198             summary = "";
199         } else {
200             final CharSequence[] entries = preference.getEntries();
201             final CharSequence[] values = preference.getEntryValues();
202             if (entries == null || entries.length == 0) {
203                 summary = "";
204             } else {
205                 int best = 0;
206                 for (int i = 0; i < values.length; i++) {
207                     long timeout = Long.parseLong(values[i].toString());
208                     if (currentTimeout >= timeout) {
209                         best = i;
210                     }
211                 }
212                 summary = preference.getContext().getString(R.string.screen_timeout_summary,
213                         entries[best]);
214             }
215         }
216         preference.setSummary(summary);
217     }
218 
disableUnusableTimeouts(ListPreference screenTimeoutPreference)219     private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) {
220         final DevicePolicyManager dpm =
221                 (DevicePolicyManager) getActivity().getSystemService(
222                 Context.DEVICE_POLICY_SERVICE);
223         final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0;
224         if (maxTimeout == 0) {
225             return; // policy not enforced
226         }
227         final CharSequence[] entries = screenTimeoutPreference.getEntries();
228         final CharSequence[] values = screenTimeoutPreference.getEntryValues();
229         ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
230         ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
231         for (int i = 0; i < values.length; i++) {
232             long timeout = Long.parseLong(values[i].toString());
233             if (timeout <= maxTimeout) {
234                 revisedEntries.add(entries[i]);
235                 revisedValues.add(values[i]);
236             }
237         }
238         if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
239             final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue());
240             screenTimeoutPreference.setEntries(
241                     revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
242             screenTimeoutPreference.setEntryValues(
243                     revisedValues.toArray(new CharSequence[revisedValues.size()]));
244             if (userPreference <= maxTimeout) {
245                 screenTimeoutPreference.setValue(String.valueOf(userPreference));
246             } else if (revisedValues.size() > 0
247                     && Long.parseLong(revisedValues.get(revisedValues.size() - 1).toString())
248                     == maxTimeout) {
249                 // If the last one happens to be the same as the max timeout, select that
250                 screenTimeoutPreference.setValue(String.valueOf(maxTimeout));
251             } else {
252                 // There will be no highlighted selection since nothing in the list matches
253                 // maxTimeout. The user can still select anything less than maxTimeout.
254                 // TODO: maybe append maxTimeout to the list and mark selected.
255             }
256         }
257         screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
258     }
259 
floatToIndex(float val)260     int floatToIndex(float val) {
261         String[] indices = getResources().getStringArray(R.array.entryvalues_font_size);
262         float lastVal = Float.parseFloat(indices[0]);
263         for (int i=1; i<indices.length; i++) {
264             float thisVal = Float.parseFloat(indices[i]);
265             if (val < (lastVal + (thisVal-lastVal)*.5f)) {
266                 return i-1;
267             }
268             lastVal = thisVal;
269         }
270         return indices.length-1;
271     }
272 
readFontSizePreference(ListPreference pref)273     public void readFontSizePreference(ListPreference pref) {
274         try {
275             mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
276         } catch (RemoteException e) {
277             Log.w(TAG, "Unable to retrieve font size");
278         }
279 
280         // mark the appropriate item in the preferences list
281         int index = floatToIndex(mCurConfig.fontScale);
282         pref.setValueIndex(index);
283 
284         // report the current size in the summary text
285         final Resources res = getResources();
286         String[] fontSizeNames = res.getStringArray(R.array.entries_font_size);
287         pref.setSummary(String.format(res.getString(R.string.summary_font_size),
288                 fontSizeNames[index]));
289     }
290 
291     @Override
onResume()292     public void onResume() {
293         super.onResume();
294         updateState();
295     }
296 
297     @Override
onCreateDialog(int dialogId)298     public Dialog onCreateDialog(int dialogId) {
299         if (dialogId == DLG_GLOBAL_CHANGE_WARNING) {
300             return Utils.buildGlobalChangeWarningDialog(getActivity(),
301                     R.string.global_font_change_title,
302                     new Runnable() {
303                         public void run() {
304                             mFontSizePref.click();
305                         }
306                     });
307         }
308         return null;
309     }
310 
311     private void updateState() {
312         readFontSizePreference(mFontSizePref);
313         updateScreenSaverSummary();
314 
315         // Update auto brightness if it is available.
316         if (mAutoBrightnessPreference != null) {
317             int brightnessMode = Settings.System.getInt(getContentResolver(),
318                     SCREEN_BRIGHTNESS_MODE, SCREEN_BRIGHTNESS_MODE_MANUAL);
319             mAutoBrightnessPreference.setChecked(brightnessMode != SCREEN_BRIGHTNESS_MODE_MANUAL);
320         }
321 
322         // Update lift-to-wake if it is available.
323         if (mLiftToWakePreference != null) {
324             int value = Settings.Secure.getInt(getContentResolver(), WAKE_GESTURE_ENABLED, 0);
325             mLiftToWakePreference.setChecked(value != 0);
326         }
327 
328         // Update doze if it is available.
329         if (mDozePreference != null) {
330             int value = Settings.Secure.getInt(getContentResolver(), DOZE_ENABLED, 1);
331             mDozePreference.setChecked(value != 0);
332         }
333     }
334 
335     private void updateScreenSaverSummary() {
336         if (mScreenSaverPreference != null) {
337             mScreenSaverPreference.setSummary(
338                     DreamSettings.getSummaryTextWithDreamName(getActivity()));
339         }
340     }
341 
342     public void writeFontSizePreference(Object objValue) {
343         try {
344             mCurConfig.fontScale = Float.parseFloat(objValue.toString());
345             ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
346         } catch (RemoteException e) {
347             Log.w(TAG, "Unable to save font size");
348         }
349     }
350 
351     @Override
352     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
353         return super.onPreferenceTreeClick(preferenceScreen, preference);
354     }
355 
356     @Override
357     public boolean onPreferenceChange(Preference preference, Object objValue) {
358         final String key = preference.getKey();
359         if (KEY_SCREEN_TIMEOUT.equals(key)) {
360             try {
361                 int value = Integer.parseInt((String) objValue);
362                 Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value);
363                 updateTimeoutPreferenceDescription(value);
364             } catch (NumberFormatException e) {
365                 Log.e(TAG, "could not persist screen timeout setting", e);
366             }
367         }
368         if (KEY_FONT_SIZE.equals(key)) {
369             writeFontSizePreference(objValue);
370         }
371         if (preference == mAutoBrightnessPreference) {
372             boolean auto = (Boolean) objValue;
373             Settings.System.putInt(getContentResolver(), SCREEN_BRIGHTNESS_MODE,
374                     auto ? SCREEN_BRIGHTNESS_MODE_AUTOMATIC : SCREEN_BRIGHTNESS_MODE_MANUAL);
375         }
376         if (preference == mLiftToWakePreference) {
377             boolean value = (Boolean) objValue;
378             Settings.Secure.putInt(getContentResolver(), WAKE_GESTURE_ENABLED, value ? 1 : 0);
379         }
380         if (preference == mDozePreference) {
381             boolean value = (Boolean) objValue;
382             Settings.Secure.putInt(getContentResolver(), DOZE_ENABLED, value ? 1 : 0);
383         }
384         return true;
385     }
386 
387     @Override
388     public boolean onPreferenceClick(Preference preference) {
389         if (preference == mFontSizePref) {
390             if (Utils.hasMultipleUsers(getActivity())) {
391                 showDialog(DLG_GLOBAL_CHANGE_WARNING);
392                 return true;
393             } else {
394                 mFontSizePref.click();
395             }
396         }
397         return false;
398     }
399 
400     public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
401             new BaseSearchIndexProvider() {
402                 @Override
403                 public List<SearchIndexableResource> getXmlResourcesToIndex(Context context,
404                         boolean enabled) {
405                     ArrayList<SearchIndexableResource> result =
406                             new ArrayList<SearchIndexableResource>();
407 
408                     SearchIndexableResource sir = new SearchIndexableResource(context);
409                     sir.xmlResId = R.xml.display_settings;
410                     result.add(sir);
411 
412                     return result;
413                 }
414 
415                 @Override
416                 public List<String> getNonIndexableKeys(Context context) {
417                     ArrayList<String> result = new ArrayList<String>();
418                     if (!context.getResources().getBoolean(
419                             com.android.internal.R.bool.config_dreamsSupported)) {
420                         result.add(KEY_SCREEN_SAVER);
421                     }
422                     if (!isAutomaticBrightnessAvailable(context.getResources())) {
423                         result.add(KEY_AUTO_BRIGHTNESS);
424                     }
425                     if (!isLiftToWakeAvailable(context)) {
426                         result.add(KEY_LIFT_TO_WAKE);
427                     }
428                     if (!isDozeAvailable(context)) {
429                         result.add(KEY_DOZE);
430                     }
431                     if (!RotationPolicy.isRotationLockToggleVisible(context)) {
432                         result.add(KEY_AUTO_ROTATE);
433                     }
434                     return result;
435                 }
436             };
437 }
438