1/*
2 * Copyright (C) 2015 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.tv.settings.system;
18
19import android.app.ActivityManagerNative;
20import android.content.Context;
21import android.content.Intent;
22import android.content.pm.PackageManager;
23import android.os.Bundle;
24import android.os.RemoteException;
25import android.os.UserHandle;
26import android.provider.Settings;
27import android.support.v17.preference.LeanbackPreferenceFragment;
28import android.support.v7.preference.ListPreference;
29import android.support.v7.preference.Preference;
30import android.support.v7.preference.PreferenceScreen;
31import android.text.TextUtils;
32import android.util.Log;
33import android.view.inputmethod.InputMethodInfo;
34import android.view.inputmethod.InputMethodManager;
35
36import com.android.tv.settings.R;
37
38import java.util.ArrayList;
39import java.util.Iterator;
40import java.util.List;
41
42public class KeyboardFragment extends LeanbackPreferenceFragment {
43    private static final String TAG = "KeyboardFragment";
44    private static final String INPUT_METHOD_SEPARATOR = ":";
45    private static final String KEY_CURRENT_KEYBOARD = "currentKeyboard";
46
47    private InputMethodManager mInputMethodManager;
48
49    public static KeyboardFragment newInstance() {
50        return new KeyboardFragment();
51    }
52
53    @Override
54    public void onCreate(Bundle savedInstanceState) {
55        mInputMethodManager =
56                (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
57
58        enableAllInputMethods();
59
60        super.onCreate(savedInstanceState);
61    }
62
63    @Override
64    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
65        final Context preferenceContext = getPreferenceManager().getContext();
66        final PackageManager packageManager = getActivity().getPackageManager();
67
68        final PreferenceScreen screen =
69                getPreferenceManager().createPreferenceScreen(preferenceContext);
70        screen.setTitle(R.string.system_keyboard);
71
72        List<InputMethodInfo> enabledInputMethodInfos = getEnabledSystemInputMethodList();
73
74        final List<CharSequence> entries = new ArrayList<>(enabledInputMethodInfos.size());
75        final List<CharSequence> values = new ArrayList<>(enabledInputMethodInfos.size());
76
77        int defaultIndex = 0;
78        final String defaultId = Settings.Secure.getString(getActivity().getContentResolver(),
79                Settings.Secure.DEFAULT_INPUT_METHOD);
80
81        for (final InputMethodInfo info : enabledInputMethodInfos) {
82            entries.add(info.loadLabel(packageManager));
83            final String id = info.getId();
84            values.add(id);
85            if (TextUtils.equals(id, defaultId)) {
86                defaultIndex = values.size() - 1;
87            }
88        }
89
90        final ListPreference currentKeyboard = new ListPreference(preferenceContext);
91        currentKeyboard.setPersistent(false);
92        currentKeyboard.setTitle(R.string.title_current_keyboard);
93        currentKeyboard.setDialogTitle(R.string.title_current_keyboard);
94        currentKeyboard.setSummary("%s");
95        currentKeyboard.setKey(KEY_CURRENT_KEYBOARD);
96        currentKeyboard.setEntries(entries.toArray(new CharSequence[entries.size()]));
97        currentKeyboard.setEntryValues(values.toArray(new CharSequence[values.size()]));
98        currentKeyboard.setValueIndex(defaultIndex);
99        currentKeyboard.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
100            @Override
101            public boolean onPreferenceChange(Preference preference, Object newValue) {
102                setInputMethod((String) newValue);
103                return true;
104            }
105        });
106        screen.addPreference(currentKeyboard);
107
108        // Add per-IME settings
109        for (final InputMethodInfo info : enabledInputMethodInfos) {
110            final Intent settingsIntent = getInputMethodSettingsIntent(info);
111            if (settingsIntent == null) {
112                continue;
113            }
114            final Preference preference = new Preference(preferenceContext);
115            preference.setTitle(info.loadLabel(packageManager));
116            preference.setKey("keyboardSettings:" + info.getId());
117            preference.setIntent(settingsIntent);
118            screen.addPreference(preference);
119        }
120        setPreferenceScreen(screen);
121    }
122
123
124
125    private void setInputMethod(String imid) {
126        if (imid == null) {
127            throw new IllegalArgumentException("Null ID");
128        }
129
130        int userId;
131        try {
132            userId = ActivityManagerNative.getDefault().getCurrentUser().id;
133            Settings.Secure.putStringForUser(getActivity().getContentResolver(),
134                    Settings.Secure.DEFAULT_INPUT_METHOD, imid, userId);
135
136            if (ActivityManagerNative.isSystemReady()) {
137                Intent intent = new Intent(Intent.ACTION_INPUT_METHOD_CHANGED);
138                intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
139                intent.putExtra("input_method_id", imid);
140                getActivity().sendBroadcastAsUser(intent, UserHandle.CURRENT);
141            }
142        } catch (RemoteException e) {
143            Log.d(TAG, "set default input method remote exception");
144        }
145    }
146
147    private List<InputMethodInfo> getEnabledSystemInputMethodList() {
148        List<InputMethodInfo> enabledInputMethodInfos =
149                new ArrayList<>(mInputMethodManager.getEnabledInputMethodList());
150        // Filter auxiliary keyboards out
151        for (Iterator<InputMethodInfo> it = enabledInputMethodInfos.iterator(); it.hasNext();) {
152            if (it.next().isAuxiliaryIme()) {
153                it.remove();
154            }
155        }
156        return enabledInputMethodInfos;
157    }
158
159    private Intent getInputMethodSettingsIntent(InputMethodInfo imi) {
160        final Intent intent;
161        final String settingsActivity = imi.getSettingsActivity();
162        if (!TextUtils.isEmpty(settingsActivity)) {
163            intent = new Intent(Intent.ACTION_MAIN);
164            intent.setClassName(imi.getPackageName(), settingsActivity);
165        } else {
166            intent = null;
167        }
168        return intent;
169    }
170
171    private void enableAllInputMethods() {
172        List<InputMethodInfo> allInputMethodInfos =
173                new ArrayList<>(mInputMethodManager.getInputMethodList());
174        boolean needAppendSeparator = false;
175        StringBuilder builder = new StringBuilder();
176        for (InputMethodInfo imi : allInputMethodInfos) {
177            if (needAppendSeparator) {
178                builder.append(INPUT_METHOD_SEPARATOR);
179            } else {
180                needAppendSeparator = true;
181            }
182            builder.append(imi.getId());
183        }
184        Settings.Secure.putString(getActivity().getContentResolver(),
185                Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());
186    }
187
188}
189