CorrectionSettingsFragment.java revision 00b49cad9cc8a350bde8210d50c4b638908ef1c4 
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
17package com.android.inputmethod.latin.settings;
18
19import android.app.Activity;
20import android.content.Context;
21import android.content.Intent;
22import android.content.SharedPreferences;
23import android.content.pm.PackageManager;
24import android.content.pm.ResolveInfo;
25import android.os.Build;
26import android.os.Bundle;
27import android.preference.ListPreference;
28import android.preference.Preference;
29
30import com.android.inputmethod.dictionarypack.DictionarySettingsActivity;
31import com.android.inputmethod.latin.R;
32import com.android.inputmethod.latin.userdictionary.UserDictionaryList;
33import com.android.inputmethod.latin.userdictionary.UserDictionarySettings;
34
35import 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 */
50public 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