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