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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.app.Activity;
     20 import android.app.admin.DevicePolicyManager;
     21 import android.content.Context;
     22 import android.graphics.Color;
     23 import android.graphics.drawable.ColorDrawable;
     24 import android.graphics.drawable.Drawable;
     25 import android.os.Bundle;
     26 import android.provider.SearchIndexableResource;
     27 import android.support.v7.preference.Preference;
     28 import android.view.inputmethod.InputMethodInfo;
     29 import android.view.inputmethod.InputMethodManager;
     30 
     31 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     32 import com.android.internal.util.Preconditions;
     33 import com.android.settings.R;
     34 import com.android.settings.SettingsPreferenceFragment;
     35 import com.android.settings.search.BaseSearchIndexProvider;
     36 import com.android.settings.search.Indexable;
     37 import com.android.settingslib.inputmethod.InputMethodAndSubtypeUtil;
     38 import com.android.settingslib.inputmethod.InputMethodPreference;
     39 
     40 import java.text.Collator;
     41 import java.util.ArrayList;
     42 import java.util.Arrays;
     43 import java.util.List;
     44 
     45 public final class VirtualKeyboardFragment extends SettingsPreferenceFragment implements Indexable {
     46 
     47     private static final String ADD_VIRTUAL_KEYBOARD_SCREEN = "add_virtual_keyboard_screen";
     48     private static final Drawable NO_ICON = new ColorDrawable(Color.TRANSPARENT);
     49 
     50     private final ArrayList<InputMethodPreference> mInputMethodPreferenceList = new ArrayList<>();
     51     private InputMethodManager mImm;
     52     private DevicePolicyManager mDpm;
     53     private Preference mAddVirtualKeyboardScreen;
     54 
     55     @Override
     56     public void onCreatePreferences(Bundle bundle, String s) {
     57         Activity activity = Preconditions.checkNotNull(getActivity());
     58         addPreferencesFromResource(R.xml.virtual_keyboard_settings);
     59         mImm = Preconditions.checkNotNull(activity.getSystemService(InputMethodManager.class));
     60         mDpm = Preconditions.checkNotNull(activity.getSystemService(DevicePolicyManager.class));
     61         mAddVirtualKeyboardScreen = Preconditions.checkNotNull(
     62                 findPreference(ADD_VIRTUAL_KEYBOARD_SCREEN));
     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         updateInputMethodPreferenceViews();
     71     }
     72 
     73     @Override
     74     public int getMetricsCategory() {
     75         return MetricsEvent.VIRTUAL_KEYBOARDS;
     76     }
     77 
     78     private void updateInputMethodPreferenceViews() {
     79         // Clear existing "InputMethodPreference"s
     80         mInputMethodPreferenceList.clear();
     81         List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
     82         final Context context = getPrefContext();
     83         final List<InputMethodInfo> imis = mImm.getEnabledInputMethodList();
     84         final int N = (imis == null ? 0 : imis.size());
     85         for (int i = 0; i < N; ++i) {
     86             final InputMethodInfo imi = imis.get(i);
     87             final boolean isAllowedByOrganization = permittedList == null
     88                     || permittedList.contains(imi.getPackageName());
     89             Drawable icon;
     90             try {
     91                 // TODO: Consider other ways to retrieve an icon to show here.
     92                 icon = getActivity().getPackageManager().getApplicationIcon(imi.getPackageName());
     93             } catch (Exception e) {
     94                 // TODO: Consider handling the error differently perhaps by showing default icons.
     95                 icon = NO_ICON;
     96             }
     97             final InputMethodPreference pref = new InputMethodPreference(
     98                     context,
     99                     imi,
    100                     false,  /* isImeEnabler */
    101                     isAllowedByOrganization,
    102                     null  /* this can be null since isImeEnabler is false */);
    103             pref.setIcon(icon);
    104             mInputMethodPreferenceList.add(pref);
    105         }
    106         final Collator collator = Collator.getInstance();
    107         mInputMethodPreferenceList.sort((lhs, rhs) -> lhs.compareTo(rhs, collator));
    108         getPreferenceScreen().removeAll();
    109         for (int i = 0; i < N; ++i) {
    110             final InputMethodPreference pref = mInputMethodPreferenceList.get(i);
    111             pref.setOrder(i);
    112             getPreferenceScreen().addPreference(pref);
    113             InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref);
    114             pref.updatePreferenceViews();
    115         }
    116         mAddVirtualKeyboardScreen.setIcon(R.drawable.ic_add_24dp);
    117         mAddVirtualKeyboardScreen.setOrder(N);
    118         getPreferenceScreen().addPreference(mAddVirtualKeyboardScreen);
    119     }
    120 
    121     public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
    122             new BaseSearchIndexProvider() {
    123                 @Override
    124                 public List<SearchIndexableResource> getXmlResourcesToIndex(
    125                         Context context, boolean enabled) {
    126                     final SearchIndexableResource sir = new SearchIndexableResource(context);
    127                     sir.xmlResId = R.xml.virtual_keyboard_settings;
    128                     return Arrays.asList(sir);
    129                 }
    130 
    131                 @Override
    132                 public List<String> getNonIndexableKeys(Context context) {
    133                     final List<String> keys = super.getNonIndexableKeys(context);
    134                     keys.add("add_virtual_keyboard_screen");
    135                     return keys;
    136                 }
    137             };
    138 }
    139