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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.v17.preference.LeanbackPreferenceFragment;
     34 import android.support.v7.preference.PreferenceScreen;
     35 import android.view.inputmethod.InputMethodInfo;
     36 import android.view.inputmethod.InputMethodManager;
     37 
     38 import com.android.settingslib.inputmethod.InputMethodAndSubtypeUtil;
     39 import com.android.settingslib.inputmethod.InputMethodPreference;
     40 import com.android.settingslib.inputmethod.InputMethodSettingValuesWrapper;
     41 import com.android.tv.settings.R;
     42 
     43 import java.text.Collator;
     44 import java.util.ArrayList;
     45 import java.util.List;
     46 
     47 /**
     48  * Fragment for enabling/disabling virtual keyboard IMEs
     49  */
     50 public final class AvailableVirtualKeyboardFragment extends LeanbackPreferenceFragment
     51         implements InputMethodPreference.OnSavePreferenceListener {
     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         Activity activity = getActivity();
     61         PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(activity);
     62         screen.setTitle(activity.getString(R.string.available_virtual_keyboard_category));
     63         setPreferenceScreen(screen);
     64         mInputMethodSettingValues = InputMethodSettingValuesWrapper.getInstance(activity);
     65         mImm = activity.getSystemService(InputMethodManager.class);
     66         mDpm = activity.getSystemService(DevicePolicyManager.class);
     67     }
     68 
     69     @Override
     70     public void onResume() {
     71         super.onResume();
     72         // Refresh internal states in mInputMethodSettingValues to keep the latest
     73         // "InputMethodInfo"s and "InputMethodSubtype"s
     74         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
     75         updateInputMethodPreferenceViews();
     76     }
     77 
     78     @Override
     79     public void onSaveInputMethodPreference(final InputMethodPreference pref) {
     80         final boolean hasHardwareKeyboard = getResources().getConfiguration().keyboard
     81                 == Configuration.KEYBOARD_QWERTY;
     82         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this,
     83                 getContext().getContentResolver(), mImm.getInputMethodList(), hasHardwareKeyboard);
     84         // Update input method settings and preference list.
     85         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
     86         for (final InputMethodPreference p : mInputMethodPreferenceList) {
     87             p.updatePreferenceViews();
     88         }
     89     }
     90 
     91     @Nullable
     92     private static Drawable loadDrawable(@NonNull final PackageManager packageManager,
     93             @NonNull final String packageName, @DrawableRes final int resId,
     94             @NonNull final ApplicationInfo applicationInfo) {
     95         if (resId == 0) {
     96             return null;
     97         }
     98         try {
     99             return packageManager.getDrawable(packageName, resId, applicationInfo);
    100         } catch (Exception e) {
    101             return null;
    102         }
    103     }
    104 
    105     @NonNull
    106     private static Drawable getInputMethodIcon(@NonNull final PackageManager packageManager,
    107             @NonNull final InputMethodInfo imi) {
    108         final ServiceInfo si = imi.getServiceInfo();
    109         final ApplicationInfo ai = si != null ? si.applicationInfo : null;
    110         final String packageName = imi.getPackageName();
    111         if (si == null || ai == null || packageName == null) {
    112             return new ColorDrawable(Color.TRANSPARENT);
    113         }
    114         // We do not use ServiceInfo#loadLogo() and ServiceInfo#loadIcon here since those methods
    115         // internally have some fallback rules, which we want to do manually.
    116         Drawable drawable = loadDrawable(packageManager, packageName, si.logo, ai);
    117         if (drawable != null) {
    118             return drawable;
    119         }
    120         drawable = loadDrawable(packageManager, packageName, si.icon, ai);
    121         if (drawable != null) {
    122             return drawable;
    123         }
    124         // We do not use ApplicationInfo#loadLogo() and ApplicationInfo#loadIcon here since those
    125         // methods internally have some fallback rules, which we want to do manually.
    126         drawable = loadDrawable(packageManager, packageName, ai.logo, ai);
    127         if (drawable != null) {
    128             return drawable;
    129         }
    130         drawable = loadDrawable(packageManager, packageName, ai.icon, ai);
    131         if (drawable != null) {
    132             return drawable;
    133         }
    134         return new ColorDrawable(Color.TRANSPARENT);
    135     }
    136 
    137     private void updateInputMethodPreferenceViews() {
    138         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
    139         // Clear existing "InputMethodPreference"s
    140         mInputMethodPreferenceList.clear();
    141         List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
    142         final Context context = getPreferenceManager().getContext();
    143         final PackageManager packageManager = getActivity().getPackageManager();
    144         final List<InputMethodInfo> imis = mInputMethodSettingValues.getInputMethodList();
    145         final int numImis = (imis == null ? 0 : imis.size());
    146         for (int i = 0; i < numImis; ++i) {
    147             final InputMethodInfo imi = imis.get(i);
    148             final boolean isAllowedByOrganization = permittedList == null
    149                     || permittedList.contains(imi.getPackageName());
    150             final InputMethodPreference pref = new InputMethodPreference(
    151                     context, imi, true, isAllowedByOrganization, this);
    152             pref.setIcon(getInputMethodIcon(packageManager, imi));
    153             mInputMethodPreferenceList.add(pref);
    154         }
    155         final Collator collator = Collator.getInstance();
    156         mInputMethodPreferenceList.sort((lhs, rhs) -> lhs.compareTo(rhs, collator));
    157         getPreferenceScreen().removeAll();
    158         for (int i = 0; i < numImis; ++i) {
    159             final InputMethodPreference pref = mInputMethodPreferenceList.get(i);
    160             pref.setOrder(i);
    161             getPreferenceScreen().addPreference(pref);
    162             InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref);
    163             pref.updatePreferenceViews();
    164         }
    165     }
    166 }
    167