1 /*
2  * Copyright (C) 2014 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.inputmethod.latin.utils;
18 
19 import android.content.Context;
20 import android.provider.Settings;
21 import android.view.inputmethod.InputMethodInfo;
22 import android.view.inputmethod.InputMethodManager;
23 
24 /*
25  * A utility class for {@link InputMethodManager}. Unlike {@link RichInputMethodManager}, this
26  * class provides synchronous, non-cached access to {@link InputMethodManager}. The setup activity
27  * is a good example to use this class because {@link InputMethodManagerService} may not be aware of
28  * this IME immediately after this IME is installed.
29  */
30 public final class UncachedInputMethodManagerUtils {
31     /**
32      * Check if the IME specified by the context is enabled.
33      * CAVEAT: This may cause a round trip IPC.
34      *
35      * @param context package context of the IME to be checked.
36      * @param imm the {@link InputMethodManager}.
37      * @return true if this IME is enabled.
38      */
isThisImeEnabled(final Context context, final InputMethodManager imm)39     public static boolean isThisImeEnabled(final Context context,
40             final InputMethodManager imm) {
41         final String packageName = context.getPackageName();
42         for (final InputMethodInfo imi : imm.getEnabledInputMethodList()) {
43             if (packageName.equals(imi.getPackageName())) {
44                 return true;
45             }
46         }
47         return false;
48     }
49 
50     /**
51      * Check if the IME specified by the context is the current IME.
52      * CAVEAT: This may cause a round trip IPC.
53      *
54      * @param context package context of the IME to be checked.
55      * @param imm the {@link InputMethodManager}.
56      * @return true if this IME is the current IME.
57      */
isThisImeCurrent(final Context context, final InputMethodManager imm)58     public static boolean isThisImeCurrent(final Context context,
59             final InputMethodManager imm) {
60         final InputMethodInfo imi = getInputMethodInfoOf(context.getPackageName(), imm);
61         final String currentImeId = Settings.Secure.getString(
62                 context.getContentResolver(), Settings.Secure.DEFAULT_INPUT_METHOD);
63         return imi != null && imi.getId().equals(currentImeId);
64     }
65 
66     /**
67      * Get {@link InputMethodInfo} of the IME specified by the package name.
68      * CAVEAT: This may cause a round trip IPC.
69      *
70      * @param packageName package name of the IME.
71      * @param imm the {@link InputMethodManager}.
72      * @return the {@link InputMethodInfo} of the IME specified by the <code>packageName</code>,
73      * or null if not found.
74      */
getInputMethodInfoOf(final String packageName, final InputMethodManager imm)75     public static InputMethodInfo getInputMethodInfoOf(final String packageName,
76             final InputMethodManager imm) {
77         for (final InputMethodInfo imi : imm.getInputMethodList()) {
78             if (packageName.equals(imi.getPackageName())) {
79                 return imi;
80             }
81         }
82         return null;
83     }
84 }
85