1/*
2 * Copyright (C) 2016 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 android.annotation.DrawableRes;
20import android.annotation.NonNull;
21import android.annotation.Nullable;
22import android.app.Activity;
23import android.app.admin.DevicePolicyManager;
24import android.content.Context;
25import android.content.pm.ApplicationInfo;
26import android.content.pm.PackageManager;
27import android.content.pm.ServiceInfo;
28import android.content.res.Configuration;
29import android.graphics.Color;
30import android.graphics.drawable.ColorDrawable;
31import android.graphics.drawable.Drawable;
32import android.os.Bundle;
33import android.provider.SearchIndexableResource;
34import android.view.inputmethod.InputMethodInfo;
35import android.view.inputmethod.InputMethodManager;
36
37import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
38import com.android.settings.R;
39import com.android.settings.SettingsPreferenceFragment;
40import com.android.settings.search.BaseSearchIndexProvider;
41import com.android.settings.search.Indexable;
42import com.android.settingslib.inputmethod.InputMethodAndSubtypeUtil;
43import com.android.settingslib.inputmethod.InputMethodPreference;
44import com.android.settingslib.inputmethod.InputMethodSettingValuesWrapper;
45
46import java.text.Collator;
47import java.util.ArrayList;
48import java.util.List;
49
50public final class AvailableVirtualKeyboardFragment extends SettingsPreferenceFragment
51        implements InputMethodPreference.OnSavePreferenceListener, Indexable {
52
53    private final ArrayList<InputMethodPreference> mInputMethodPreferenceList = new ArrayList<>();
54    private InputMethodSettingValuesWrapper mInputMethodSettingValues;
55    private InputMethodManager mImm;
56    private DevicePolicyManager mDpm;
57
58    @Override
59    public void onCreatePreferences(Bundle bundle, String s) {
60        addPreferencesFromResource(R.xml.available_virtual_keyboard);
61        Activity activity = getActivity();
62
63        mInputMethodSettingValues = InputMethodSettingValuesWrapper.getInstance(activity);
64        mImm = activity.getSystemService(InputMethodManager.class);
65        mDpm = activity.getSystemService(DevicePolicyManager.class);
66    }
67
68    @Override
69    public void onResume() {
70        super.onResume();
71        // Refresh internal states in mInputMethodSettingValues to keep the latest
72        // "InputMethodInfo"s and "InputMethodSubtype"s
73        mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
74        updateInputMethodPreferenceViews();
75    }
76
77    @Override
78    public void onSaveInputMethodPreference(final InputMethodPreference pref) {
79        final boolean hasHardwareKeyboard = getResources().getConfiguration().keyboard
80                == Configuration.KEYBOARD_QWERTY;
81        InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this, getContentResolver(),
82                mImm.getInputMethodList(), hasHardwareKeyboard);
83        // Update input method settings and preference list.
84        mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
85        for (final InputMethodPreference p : mInputMethodPreferenceList) {
86            p.updatePreferenceViews();
87        }
88    }
89
90    @Override
91    public int getMetricsCategory() {
92        return MetricsEvent.ENABLE_VIRTUAL_KEYBOARDS;
93    }
94
95    @Nullable
96    private static Drawable loadDrawable(@NonNull final PackageManager packageManager,
97            @NonNull final String packageName, @DrawableRes final int resId,
98            @NonNull final ApplicationInfo applicationInfo) {
99        if (resId == 0) {
100            return null;
101        }
102        try {
103            return packageManager.getDrawable(packageName, resId, applicationInfo);
104        } catch (Exception e) {
105            return null;
106        }
107    }
108
109    @NonNull
110    private static Drawable getInputMethodIcon(@NonNull final PackageManager packageManager,
111            @NonNull final InputMethodInfo imi) {
112        final ServiceInfo si = imi.getServiceInfo();
113        final ApplicationInfo ai = si != null ? si.applicationInfo : null;
114        final String packageName = imi.getPackageName();
115        if (si == null || ai == null || packageName == null) {
116            return new ColorDrawable(Color.TRANSPARENT);
117        }
118        // We do not use ServiceInfo#loadLogo() and ServiceInfo#loadIcon here since those methods
119        // internally have some fallback rules, which we want to do manually.
120        Drawable drawable = loadDrawable(packageManager, packageName, si.logo, ai);
121        if (drawable != null) {
122            return drawable;
123        }
124        drawable = loadDrawable(packageManager, packageName, si.icon, ai);
125        if (drawable != null) {
126            return drawable;
127        }
128        // We do not use ApplicationInfo#loadLogo() and ApplicationInfo#loadIcon here since those
129        // methods internally have some fallback rules, which we want to do manually.
130        drawable = loadDrawable(packageManager, packageName, ai.logo, ai);
131        if (drawable != null) {
132            return drawable;
133        }
134        drawable = loadDrawable(packageManager, packageName, ai.icon, ai);
135        if (drawable != null) {
136            return drawable;
137        }
138        return new ColorDrawable(Color.TRANSPARENT);
139    }
140
141    private void updateInputMethodPreferenceViews() {
142        mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
143        // Clear existing "InputMethodPreference"s
144        mInputMethodPreferenceList.clear();
145        List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
146        final Context context = getPrefContext();
147        final PackageManager packageManager = getActivity().getPackageManager();
148        final List<InputMethodInfo> imis = mInputMethodSettingValues.getInputMethodList();
149        final int numImis = (imis == null ? 0 : imis.size());
150        for (int i = 0; i < numImis; ++i) {
151            final InputMethodInfo imi = imis.get(i);
152            final boolean isAllowedByOrganization = permittedList == null
153                    || permittedList.contains(imi.getPackageName());
154            final InputMethodPreference pref = new InputMethodPreference(
155                    context, imi, true, isAllowedByOrganization, this);
156            pref.setIcon(getInputMethodIcon(packageManager, imi));
157            mInputMethodPreferenceList.add(pref);
158        }
159        final Collator collator = Collator.getInstance();
160        mInputMethodPreferenceList.sort((lhs, rhs) -> lhs.compareTo(rhs, collator));
161        getPreferenceScreen().removeAll();
162        for (int i = 0; i < numImis; ++i) {
163            final InputMethodPreference pref = mInputMethodPreferenceList.get(i);
164            pref.setOrder(i);
165            getPreferenceScreen().addPreference(pref);
166            InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref);
167            pref.updatePreferenceViews();
168        }
169    }
170
171    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
172            new BaseSearchIndexProvider() {
173                @Override
174                public List<SearchIndexableResource> getXmlResourcesToIndex(Context context,
175                        boolean enabled) {
176                    List<SearchIndexableResource> res = new ArrayList<>();
177                    SearchIndexableResource index = new SearchIndexableResource(context);
178                    index.xmlResId = R.xml.available_virtual_keyboard;
179                    res.add(index);
180                    return res;
181                }
182            };
183}
184