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      1 /*
      2  * Copyright (C) 2017 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.tv.settings.inputmethod;
     18 
     19 import android.annotation.DrawableRes;
     20 import android.annotation.NonNull;
     21 import android.annotation.Nullable;
     22 import android.app.Activity;
     23 import android.app.admin.DevicePolicyManager;
     24 import android.content.Context;
     25 import android.content.pm.ApplicationInfo;
     26 import android.content.pm.PackageManager;
     27 import android.content.pm.ServiceInfo;
     28 import android.content.res.Configuration;
     29 import android.graphics.Color;
     30 import android.graphics.drawable.ColorDrawable;
     31 import android.graphics.drawable.Drawable;
     32 import android.os.Bundle;
     33 import android.support.annotation.Keep;
     34 import android.support.v7.preference.PreferenceScreen;
     35 import android.view.inputmethod.InputMethodInfo;
     36 import android.view.inputmethod.InputMethodManager;
     37 
     38 import com.android.internal.logging.nano.MetricsProto;
     39 import com.android.settingslib.inputmethod.InputMethodAndSubtypeUtil;
     40 import com.android.settingslib.inputmethod.InputMethodPreference;
     41 import com.android.settingslib.inputmethod.InputMethodSettingValuesWrapper;
     42 import com.android.tv.settings.R;
     43 import com.android.tv.settings.SettingsPreferenceFragment;
     44 
     45 import java.text.Collator;
     46 import java.util.ArrayList;
     47 import java.util.List;
     48 
     49 /**
     50  * Fragment for enabling/disabling virtual keyboard IMEs
     51  */
     52 @Keep
     53 public final class AvailableVirtualKeyboardFragment extends SettingsPreferenceFragment
     54         implements InputMethodPreference.OnSavePreferenceListener {
     55 
     56     private final ArrayList<InputMethodPreference> mInputMethodPreferenceList = new ArrayList<>();
     57     private InputMethodSettingValuesWrapper mInputMethodSettingValues;
     58     private InputMethodManager mImm;
     59     private DevicePolicyManager mDpm;
     60 
     61     @Override
     62     public void onCreatePreferences(Bundle bundle, String s) {
     63         Activity activity = getActivity();
     64         PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(activity);
     65         screen.setTitle(activity.getString(R.string.available_virtual_keyboard_category));
     66         setPreferenceScreen(screen);
     67         mInputMethodSettingValues = InputMethodSettingValuesWrapper.getInstance(activity);
     68         mImm = activity.getSystemService(InputMethodManager.class);
     69         mDpm = activity.getSystemService(DevicePolicyManager.class);
     70     }
     71 
     72     @Override
     73     public void onResume() {
     74         super.onResume();
     75         // Refresh internal states in mInputMethodSettingValues to keep the latest
     76         // "InputMethodInfo"s and "InputMethodSubtype"s
     77         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
     78         updateInputMethodPreferenceViews();
     79     }
     80 
     81     @Override
     82     public void onSaveInputMethodPreference(final InputMethodPreference pref) {
     83         final boolean hasHardwareKeyboard = getResources().getConfiguration().keyboard
     84                 == Configuration.KEYBOARD_QWERTY;
     85         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this,
     86                 getContext().getContentResolver(), mImm.getInputMethodList(), hasHardwareKeyboard);
     87         // Update input method settings and preference list.
     88         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
     89         for (final InputMethodPreference p : mInputMethodPreferenceList) {
     90             p.updatePreferenceViews();
     91         }
     92     }
     93 
     94     @Nullable
     95     private static Drawable loadDrawable(@NonNull final PackageManager packageManager,
     96             @NonNull final String packageName, @DrawableRes final int resId,
     97             @NonNull final ApplicationInfo applicationInfo) {
     98         if (resId == 0) {
     99             return null;
    100         }
    101         try {
    102             return packageManager.getDrawable(packageName, resId, applicationInfo);
    103         } catch (Exception e) {
    104             return null;
    105         }
    106     }
    107 
    108     @NonNull
    109     private static Drawable getInputMethodIcon(@NonNull final PackageManager packageManager,
    110             @NonNull final InputMethodInfo imi) {
    111         final ServiceInfo si = imi.getServiceInfo();
    112         final ApplicationInfo ai = si != null ? si.applicationInfo : null;
    113         final String packageName = imi.getPackageName();
    114         if (si == null || ai == null || packageName == null) {
    115             return new ColorDrawable(Color.TRANSPARENT);
    116         }
    117         // We do not use ServiceInfo#loadLogo() and ServiceInfo#loadIcon here since those methods
    118         // internally have some fallback rules, which we want to do manually.
    119         Drawable drawable = loadDrawable(packageManager, packageName, si.logo, ai);
    120         if (drawable != null) {
    121             return drawable;
    122         }
    123         drawable = loadDrawable(packageManager, packageName, si.icon, ai);
    124         if (drawable != null) {
    125             return drawable;
    126         }
    127         // We do not use ApplicationInfo#loadLogo() and ApplicationInfo#loadIcon here since those
    128         // methods internally have some fallback rules, which we want to do manually.
    129         drawable = loadDrawable(packageManager, packageName, ai.logo, ai);
    130         if (drawable != null) {
    131             return drawable;
    132         }
    133         drawable = loadDrawable(packageManager, packageName, ai.icon, ai);
    134         if (drawable != null) {
    135             return drawable;
    136         }
    137         return new ColorDrawable(Color.TRANSPARENT);
    138     }
    139 
    140     private void updateInputMethodPreferenceViews() {
    141         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
    142         // Clear existing "InputMethodPreference"s
    143         mInputMethodPreferenceList.clear();
    144         List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
    145         final Context context = getPreferenceManager().getContext();
    146         final PackageManager packageManager = getActivity().getPackageManager();
    147         final List<InputMethodInfo> imis = mInputMethodSettingValues.getInputMethodList();
    148         final int numImis = (imis == null ? 0 : imis.size());
    149         for (int i = 0; i < numImis; ++i) {
    150             final InputMethodInfo imi = imis.get(i);
    151             final boolean isAllowedByOrganization = permittedList == null
    152                     || permittedList.contains(imi.getPackageName());
    153             final InputMethodPreference pref = new InputMethodPreference(
    154                     context, imi, true, isAllowedByOrganization, this);
    155             pref.setIcon(getInputMethodIcon(packageManager, imi));
    156             mInputMethodPreferenceList.add(pref);
    157         }
    158         final Collator collator = Collator.getInstance();
    159         mInputMethodPreferenceList.sort((lhs, rhs) -> lhs.compareTo(rhs, collator));
    160         getPreferenceScreen().removeAll();
    161         for (int i = 0; i < numImis; ++i) {
    162             final InputMethodPreference pref = mInputMethodPreferenceList.get(i);
    163             pref.setOrder(i);
    164             getPreferenceScreen().addPreference(pref);
    165             InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref);
    166             pref.updatePreferenceViews();
    167         }
    168     }
    169 
    170     @Override
    171     public int getMetricsCategory() {
    172         return MetricsProto.MetricsEvent.ENABLE_VIRTUAL_KEYBOARDS;
    173     }
    174 }
    175