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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.settingslib.inputmethod;
     18 
     19 import android.annotation.UiThread;
     20 import android.content.ContentResolver;
     21 import android.content.Context;
     22 import android.util.Log;
     23 import android.view.inputmethod.InputMethodInfo;
     24 import android.view.inputmethod.InputMethodManager;
     25 
     26 import java.util.ArrayList;
     27 import java.util.HashMap;
     28 import java.util.HashSet;
     29 import java.util.List;
     30 
     31 /**
     32  * This class is a wrapper for {@link InputMethodManager} and
     33  * {@link android.provider.Settings.Secure#ENABLED_INPUT_METHODS}. You need to refresh internal
     34  * states manually on some events when "InputMethodInfo"s and "InputMethodSubtype"s can be changed.
     35  *
     36  * <p>TODO: Consolidate this with {@link InputMethodAndSubtypeUtil}.</p>
     37  */
     38 @UiThread
     39 public class InputMethodSettingValuesWrapper {
     40     private static final String TAG = InputMethodSettingValuesWrapper.class.getSimpleName();
     41 
     42     private static volatile InputMethodSettingValuesWrapper sInstance;
     43     private final ArrayList<InputMethodInfo> mMethodList = new ArrayList<>();
     44     private final ContentResolver mContentResolver;
     45     private final InputMethodManager mImm;
     46 
     47     public static InputMethodSettingValuesWrapper getInstance(Context context) {
     48         if (sInstance == null) {
     49             synchronized (TAG) {
     50                 if (sInstance == null) {
     51                     sInstance = new InputMethodSettingValuesWrapper(context);
     52                 }
     53             }
     54         }
     55         return sInstance;
     56     }
     57 
     58     // Ensure singleton
     59     private InputMethodSettingValuesWrapper(Context context) {
     60         mContentResolver = context.getContentResolver();
     61         mImm = context.getSystemService(InputMethodManager.class);
     62         refreshAllInputMethodAndSubtypes();
     63     }
     64 
     65     public void refreshAllInputMethodAndSubtypes() {
     66         mMethodList.clear();
     67         mMethodList.addAll(mImm.getInputMethodList());
     68     }
     69 
     70     public List<InputMethodInfo> getInputMethodList() {
     71         return new ArrayList<>(mMethodList);
     72     }
     73 
     74     public boolean isAlwaysCheckedIme(InputMethodInfo imi) {
     75         final boolean isEnabled = isEnabledImi(imi);
     76         if (getEnabledInputMethodList().size() <= 1 && isEnabled) {
     77             return true;
     78         }
     79 
     80         final int enabledValidNonAuxAsciiCapableImeCount =
     81                 getEnabledValidNonAuxAsciiCapableImeCount();
     82 
     83         return enabledValidNonAuxAsciiCapableImeCount <= 1
     84                 && !(enabledValidNonAuxAsciiCapableImeCount == 1 && !isEnabled)
     85                 && imi.isSystem()
     86                 && InputMethodAndSubtypeUtil.isValidNonAuxAsciiCapableIme(imi);
     87     }
     88 
     89     private int getEnabledValidNonAuxAsciiCapableImeCount() {
     90         int count = 0;
     91         final List<InputMethodInfo> enabledImis = getEnabledInputMethodList();
     92         for (final InputMethodInfo imi : enabledImis) {
     93             if (InputMethodAndSubtypeUtil.isValidNonAuxAsciiCapableIme(imi)) {
     94                 ++count;
     95             }
     96         }
     97         if (count == 0) {
     98             Log.w(TAG, "No \"enabledValidNonAuxAsciiCapableIme\"s found.");
     99         }
    100         return count;
    101     }
    102 
    103     public boolean isEnabledImi(InputMethodInfo imi) {
    104         final List<InputMethodInfo> enabledImis = getEnabledInputMethodList();
    105         for (final InputMethodInfo tempImi : enabledImis) {
    106             if (tempImi.getId().equals(imi.getId())) {
    107                 return true;
    108             }
    109         }
    110         return false;
    111     }
    112 
    113     /**
    114      * Returns the list of the enabled {@link InputMethodInfo} determined by
    115      * {@link android.provider.Settings.Secure#ENABLED_INPUT_METHODS} rather than just returning
    116      * {@link InputMethodManager#getEnabledInputMethodList()}.
    117      *
    118      * @return the list of the enabled {@link InputMethodInfo}
    119      */
    120     private ArrayList<InputMethodInfo> getEnabledInputMethodList() {
    121         final HashMap<String, HashSet<String>> enabledInputMethodsAndSubtypes =
    122                 InputMethodAndSubtypeUtil.getEnabledInputMethodsAndSubtypeList(mContentResolver);
    123         final ArrayList<InputMethodInfo> result = new ArrayList<>();
    124         for (InputMethodInfo imi : mMethodList) {
    125             if (enabledInputMethodsAndSubtypes.keySet().contains(imi.getId())) {
    126                 result.add(imi);
    127             }
    128         }
    129         return result;
    130     }
    131 }
    132