1/*
2 * Copyright (C) 2011 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.settings.inputmethod;
18
19import com.android.settings.R;
20import com.android.settings.SettingsPreferenceFragment;
21import com.android.settings.Utils;
22
23import android.app.Activity;
24import android.content.Intent;
25import android.database.Cursor;
26import android.os.Bundle;
27import android.preference.Preference;
28import android.preference.PreferenceGroup;
29import android.provider.UserDictionary;
30
31import java.util.Locale;
32import java.util.Set;
33import java.util.TreeSet;
34
35public class UserDictionaryList extends SettingsPreferenceFragment {
36
37    public static final String USER_DICTIONARY_SETTINGS_INTENT_ACTION =
38            "android.settings.USER_DICTIONARY_SETTINGS";
39
40    @Override
41    public void onCreate(Bundle icicle) {
42        super.onCreate(icicle);
43        setPreferenceScreen(getPreferenceManager().createPreferenceScreen(getActivity()));
44    }
45
46    static Set<String> getUserDictionaryLocalesList(Activity activity) {
47        @SuppressWarnings("deprecation")
48        final Cursor cursor = activity.managedQuery(UserDictionary.Words.CONTENT_URI,
49                new String[] { UserDictionary.Words.LOCALE },
50                null, null, null);
51        final Set<String> localeList = new TreeSet<String>();
52        if (null == cursor) {
53            // The user dictionary service is not present or disabled. Return null.
54            return null;
55        } else if (cursor.moveToFirst()) {
56            final int columnIndex = cursor.getColumnIndex(UserDictionary.Words.LOCALE);
57            do {
58                String locale = cursor.getString(columnIndex);
59                localeList.add(null != locale ? locale : "");
60            } while (cursor.moveToNext());
61        }
62        localeList.add(Locale.getDefault().toString());
63        return localeList;
64    }
65
66    /**
67     * Creates the entries that allow the user to go into the user dictionary for each locale.
68     * @param userDictGroup The group to put the settings in.
69     */
70    protected void createUserDictSettings(PreferenceGroup userDictGroup) {
71        final Activity activity = getActivity();
72        userDictGroup.removeAll();
73        final Set<String> localeList = UserDictionaryList.getUserDictionaryLocalesList(activity);
74
75        if (localeList.isEmpty()) {
76            userDictGroup.addPreference(createUserDictionaryPreference(null, activity));
77        } else {
78            for (String locale : localeList) {
79                userDictGroup.addPreference(createUserDictionaryPreference(locale, activity));
80            }
81        }
82    }
83
84    /**
85     * Create a single User Dictionary Preference object, with its parameters set.
86     * @param locale The locale for which this user dictionary is for.
87     * @return The corresponding preference.
88     */
89    protected Preference createUserDictionaryPreference(String locale, Activity activity) {
90        final Preference newPref = new Preference(getActivity());
91        final Intent intent = new Intent(USER_DICTIONARY_SETTINGS_INTENT_ACTION);
92        if (null == locale) {
93            newPref.setTitle(Locale.getDefault().getDisplayName());
94        } else {
95            if ("".equals(locale))
96                newPref.setTitle(getString(R.string.user_dict_settings_all_languages));
97            else
98                newPref.setTitle(Utils.createLocaleFromString(locale).getDisplayName());
99            intent.putExtra("locale", locale);
100            newPref.getExtras().putString("locale", locale);
101        }
102        newPref.setIntent(intent);
103        return newPref;
104    }
105
106    @Override
107    public void onResume() {
108        super.onResume();
109        createUserDictSettings(getPreferenceScreen());
110    }
111}
112