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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.app.Activity;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.SharedPreferences;
     23 import android.content.pm.PackageManager;
     24 import android.content.pm.ResolveInfo;
     25 import android.os.Build;
     26 import android.os.Bundle;
     27 import android.preference.ListPreference;
     28 import android.preference.Preference;
     29 
     30 import com.android.inputmethod.dictionarypack.DictionarySettingsActivity;
     31 import com.android.inputmethod.latin.R;
     32 import com.android.inputmethod.latin.userdictionary.UserDictionaryList;
     33 import com.android.inputmethod.latin.userdictionary.UserDictionarySettings;
     34 
     35 import java.util.TreeSet;
     36 
     37 /**
     38  * "Text correction" settings sub screen.
     39  *
     40  * This settings sub screen handles the following text correction preferences.
     41  * - Personal dictionary
     42  * - Add-on dictionaries
     43  * - Block offensive words
     44  * - Auto-correction
     45  * - Show correction suggestions
     46  * - Personalized suggestions
     47  * - Suggest Contact names
     48  * - Next-word suggestions
     49  */
     50 public final class CorrectionSettingsFragment extends SubScreenFragment {
     51     private static final boolean DBG_USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS = false;
     52     private static final boolean USE_INTERNAL_PERSONAL_DICTIONARY_SETTIGS =
     53             DBG_USE_INTERNAL_PERSONAL_DICTIONARY_SETTINGS
     54             || Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR2;
     55 
     56     @Override
     57     public void onCreate(final Bundle icicle) {
     58         super.onCreate(icicle);
     59         addPreferencesFromResource(R.xml.prefs_screen_correction);
     60 
     61         final Context context = getActivity();
     62         final PackageManager pm = context.getPackageManager();
     63 
     64         ensureConsistencyOfAutoCorrectionSettings();
     65 
     66         final Preference dictionaryLink = findPreference(Settings.PREF_CONFIGURE_DICTIONARIES_KEY);
     67         final Intent intent = dictionaryLink.getIntent();
     68         intent.setClassName(context.getPackageName(), DictionarySettingsActivity.class.getName());
     69         final int number = pm.queryIntentActivities(intent, 0).size();
     70         if (0 >= number) {
     71             removePreference(Settings.PREF_CONFIGURE_DICTIONARIES_KEY);
     72         }
     73 
     74         final Preference editPersonalDictionary =
     75                 findPreference(Settings.PREF_EDIT_PERSONAL_DICTIONARY);
     76         final Intent editPersonalDictionaryIntent = editPersonalDictionary.getIntent();
     77         final ResolveInfo ri = USE_INTERNAL_PERSONAL_DICTIONARY_SETTIGS ? null
     78                 : pm.resolveActivity(
     79                         editPersonalDictionaryIntent, PackageManager.MATCH_DEFAULT_ONLY);
     80         if (ri == null) {
     81             overwriteUserDictionaryPreference(editPersonalDictionary);
     82         }
     83     }
     84 
     85     @Override
     86     public void onSharedPreferenceChanged(final SharedPreferences prefs, final String key) {
     87         ensureConsistencyOfAutoCorrectionSettings();
     88     }
     89 
     90     private void ensureConsistencyOfAutoCorrectionSettings() {
     91         final String autoCorrectionOff = getString(
     92                 R.string.auto_correction_threshold_mode_index_off);
     93         final ListPreference autoCorrectionThresholdPref = (ListPreference)findPreference(
     94                 Settings.PREF_AUTO_CORRECTION_THRESHOLD);
     95         final String currentSetting = autoCorrectionThresholdPref.getValue();
     96         setPreferenceEnabled(
     97                 Settings.PREF_BIGRAM_PREDICTIONS, !currentSetting.equals(autoCorrectionOff));
     98     }
     99 
    100     private void overwriteUserDictionaryPreference(final Preference userDictionaryPreference) {
    101         final Activity activity = getActivity();
    102         final TreeSet<String> localeList = UserDictionaryList.getUserDictionaryLocalesSet(activity);
    103         if (null == localeList) {
    104             // The locale list is null if and only if the user dictionary service is
    105             // not present or disabled. In this case we need to remove the preference.
    106             getPreferenceScreen().removePreference(userDictionaryPreference);
    107         } else if (localeList.size() <= 1) {
    108             userDictionaryPreference.setFragment(UserDictionarySettings.class.getName());
    109             // If the size of localeList is 0, we don't set the locale parameter in the
    110             // extras. This will be interpreted by the UserDictionarySettings class as
    111             // meaning "the current locale".
    112             // Note that with the current code for UserDictionaryList#getUserDictionaryLocalesSet()
    113             // the locale list always has at least one element, since it always includes the current
    114             // locale explicitly. @see UserDictionaryList.getUserDictionaryLocalesSet().
    115             if (localeList.size() == 1) {
    116                 final String locale = (String)localeList.toArray()[0];
    117                 userDictionaryPreference.getExtras().putString("locale", locale);
    118             }
    119         } else {
    120             userDictionaryPreference.setFragment(UserDictionaryList.class.getName());
    121         }
    122     }
    123 }
    124