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      1 /*
      2  * Copyright (C) 2014 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.inputmethod.latin.settings;
     18 
     19 import android.Manifest;
     20 import android.app.Activity;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.SharedPreferences;
     24 import android.content.pm.PackageManager;
     25 import android.content.pm.ResolveInfo;
     26 import android.os.Build;
     27 import android.os.Bundle;
     28 import android.preference.Preference;
     29 import android.preference.SwitchPreference;
     30 import android.text.TextUtils;
     31 
     32 import com.android.inputmethod.dictionarypack.DictionarySettingsActivity;
     33 import com.android.inputmethod.latin.R;
     34 import com.android.inputmethod.latin.permissions.PermissionsManager;
     35 import com.android.inputmethod.latin.permissions.PermissionsUtil;
     36 import com.android.inputmethod.latin.userdictionary.UserDictionaryList;
     37 import com.android.inputmethod.latin.userdictionary.UserDictionarySettings;
     38 
     39 import java.util.TreeSet;
     40 
     41 /**
     42  * "Text correction" settings sub screen.
     43  *
     44  * This settings sub screen handles the following text correction preferences.
     45  * - Personal dictionary
     46  * - Add-on dictionaries
     47  * - Block offensive words
     48  * - Auto-correction
     49  * - Show correction suggestions
     50  * - Personalized suggestions
     51  * - Suggest Contact names
     52  * - Next-word suggestions
     53  */
     54 public final class CorrectionSettingsFragment extends SubScreenFragment
     55     implements SharedPreferences.OnSharedPreferenceChangeListener,
     56             PermissionsManager.PermissionsResultCallback {
     57 
     58     private static final boolean DBG_USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS = false;
     59     private static final boolean USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS =
     60             DBG_USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS
     61             || Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR2;
     62 
     63     private SwitchPreference mUseContactsPreference;
     64 
     65     @Override
     66     public void onCreate(final Bundle icicle) {
     67         super.onCreate(icicle);
     68         addPreferencesFromResource(R.xml.prefs_screen_correction);
     69 
     70         final Context context = getActivity();
     71         final PackageManager pm = context.getPackageManager();
     72 
     73         final Preference dictionaryLink = findPreference(Settings.PREF_CONFIGURE_DICTIONARIES_KEY);
     74         final Intent intent = dictionaryLink.getIntent();
     75         intent.setClassName(context.getPackageName(), DictionarySettingsActivity.class.getName());
     76         final int number = pm.queryIntentActivities(intent, 0).size();
     77         if (0 >= number) {
     78             removePreference(Settings.PREF_CONFIGURE_DICTIONARIES_KEY);
     79         }
     80 
     81         final Preference editPersonalDictionary =
     82                 findPreference(Settings.PREF_EDIT_PERSONAL_DICTIONARY);
     83         final Intent editPersonalDictionaryIntent = editPersonalDictionary.getIntent();
     84         final ResolveInfo ri = USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS ? null
     85                 : pm.resolveActivity(
     86                         editPersonalDictionaryIntent, PackageManager.MATCH_DEFAULT_ONLY);
     87         if (ri == null) {
     88             overwriteUserDictionaryPreference(editPersonalDictionary);
     89         }
     90 
     91         mUseContactsPreference = (SwitchPreference) findPreference(Settings.PREF_KEY_USE_CONTACTS_DICT);
     92         turnOffUseContactsIfNoPermission();
     93     }
     94 
     95     private void overwriteUserDictionaryPreference(final Preference userDictionaryPreference) {
     96         final Activity activity = getActivity();
     97         final TreeSet<String> localeList = UserDictionaryList.getUserDictionaryLocalesSet(activity);
     98         if (null == localeList) {
     99             // The locale list is null if and only if the user dictionary service is
    100             // not present or disabled. In this case we need to remove the preference.
    101             getPreferenceScreen().removePreference(userDictionaryPreference);
    102         } else if (localeList.size() <= 1) {
    103             userDictionaryPreference.setFragment(UserDictionarySettings.class.getName());
    104             // If the size of localeList is 0, we don't set the locale parameter in the
    105             // extras. This will be interpreted by the UserDictionarySettings class as
    106             // meaning "the current locale".
    107             // Note that with the current code for UserDictionaryList#getUserDictionaryLocalesSet()
    108             // the locale list always has at least one element, since it always includes the current
    109             // locale explicitly. @see UserDictionaryList.getUserDictionaryLocalesSet().
    110             if (localeList.size() == 1) {
    111                 final String locale = (String)localeList.toArray()[0];
    112                 userDictionaryPreference.getExtras().putString("locale", locale);
    113             }
    114         } else {
    115             userDictionaryPreference.setFragment(UserDictionaryList.class.getName());
    116         }
    117     }
    118 
    119     @Override
    120     public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) {
    121         if (!TextUtils.equals(key, Settings.PREF_KEY_USE_CONTACTS_DICT)) {
    122             return;
    123         }
    124         if (!sharedPreferences.getBoolean(key, false)) {
    125             // don't care if the preference is turned off.
    126             return;
    127         }
    128 
    129         // Check for permissions.
    130         if (PermissionsUtil.checkAllPermissionsGranted(
    131                 getActivity() /* context */, Manifest.permission.READ_CONTACTS)) {
    132             return; // all permissions granted, no need to request permissions.
    133         }
    134 
    135         PermissionsManager.get(getActivity() /* context */).requestPermissions(
    136                 this /* PermissionsResultCallback */,
    137                 getActivity() /* activity */,
    138                 Manifest.permission.READ_CONTACTS);
    139     }
    140 
    141     @Override
    142     public void onRequestPermissionsResult(boolean allGranted) {
    143         turnOffUseContactsIfNoPermission();
    144     }
    145 
    146     private void turnOffUseContactsIfNoPermission() {
    147         if (!PermissionsUtil.checkAllPermissionsGranted(
    148                 getActivity(), Manifest.permission.READ_CONTACTS)) {
    149             mUseContactsPreference.setChecked(false);
    150         }
    151     }
    152 }
    153