1 /*
2  * Copyright (C) 2021 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 package com.android.tv.settings.inputmethod;
17 
18 import android.app.ActivityManager;
19 import android.content.Context;
20 import android.content.Intent;
21 import android.os.RemoteException;
22 import android.os.UserHandle;
23 import android.provider.Settings;
24 import android.text.TextUtils;
25 import android.util.Log;
26 import android.view.inputmethod.InputMethodInfo;
27 import android.view.inputmethod.InputMethodManager;
28 
29 import com.android.tv.settings.util.SliceUtils;
30 
31 import java.util.ArrayList;
32 import java.util.List;
33 
34 /**
35  * Helper class for InputMethod
36  */
37 public class InputMethodHelper {
38 
39     public static final String TAG = "InputMethodHelper";
40 
41     /**
42      * Get list of enabled InputMethod
43      */
getEnabledSystemInputMethodList(Context context)44     public static List<InputMethodInfo> getEnabledSystemInputMethodList(Context context) {
45         InputMethodManager inputMethodManager =
46                 (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
47         List<InputMethodInfo> enabledInputMethodInfos =
48                 new ArrayList<>(inputMethodManager.getEnabledInputMethodList());
49         // Filter auxiliary keyboards out
50         enabledInputMethodInfos.removeIf(InputMethodInfo::isAuxiliaryIme);
51         return enabledInputMethodInfos;
52     }
53 
54     /**
55      * Get id of default InputMethod
56      */
getDefaultInputMethodId(Context context)57     public static String getDefaultInputMethodId(Context context) {
58         return Settings.Secure.getString(context.getContentResolver(),
59                 Settings.Secure.DEFAULT_INPUT_METHOD);
60     }
61 
62     /**
63      * Set default InputMethod by id
64      */
setDefaultInputMethodId(Context context, String imid)65     public static void setDefaultInputMethodId(Context context, String imid) {
66         if (imid == null) {
67             throw new IllegalArgumentException("Null ID");
68         }
69 
70         try {
71             int userId = ActivityManager.getService().getCurrentUser().id;
72             Settings.Secure.putStringForUser(context.getContentResolver(),
73                     Settings.Secure.DEFAULT_INPUT_METHOD, imid, userId);
74 
75             Intent intent = new Intent(Intent.ACTION_INPUT_METHOD_CHANGED);
76             intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
77             intent.putExtra("input_method_id", imid);
78             context.sendBroadcastAsUser(intent, UserHandle.CURRENT);
79         } catch (RemoteException e) {
80             Log.d(TAG, "set default input method remote exception", e);
81         }
82     }
83 
84     /**
85      * Find InputMethod from a List by id.
86      */
findInputMethod(String imid, List<InputMethodInfo> enabledInputMethodInfos)87     public static InputMethodInfo findInputMethod(String imid,
88             List<InputMethodInfo> enabledInputMethodInfos) {
89         for (int i = 0, size = enabledInputMethodInfos.size(); i < size; i++) {
90             final InputMethodInfo info = enabledInputMethodInfos.get(i);
91             final String id = info.getId();
92             if (TextUtils.equals(id, imid)) {
93                 return info;
94             }
95         }
96         return null;
97     }
98 
99     /**
100      * Get settings Intent of an InputMethod.
101      */
getInputMethodSettingsIntent(InputMethodInfo imi)102     public static Intent getInputMethodSettingsIntent(InputMethodInfo imi) {
103         final Intent intent;
104         final String settingsActivity = imi.getSettingsActivity();
105         if (!TextUtils.isEmpty(settingsActivity)) {
106             intent = new Intent(Intent.ACTION_MAIN);
107             intent.setClassName(imi.getPackageName(), settingsActivity);
108         } else {
109             intent = null;
110         }
111         return intent;
112     }
113 
114     /**
115      * Find potential slice provider based on settings activity name.
116      */
getInputMethodsSettingsUri(Context context, InputMethodInfo imi)117     public static String getInputMethodsSettingsUri(Context context, InputMethodInfo imi) {
118         String sliceUri = "content://" + imi.getPackageName() + ".tv.sliceprovider" + "/general";
119         if (SliceUtils.isSliceProviderValid(context, sliceUri)) {
120             return sliceUri;
121         }
122         return null;
123     }
124 }
125