1 /*
2  * Copyright (C) 2011 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 android.text.method;
17 
18 import android.annotation.NonNull;
19 import android.annotation.Nullable;
20 import android.compat.annotation.UnsupportedAppUsage;
21 import android.content.Context;
22 import android.graphics.Rect;
23 import android.text.Spanned;
24 import android.text.TextUtils;
25 import android.util.Log;
26 import android.view.View;
27 import android.widget.TextView;
28 
29 import java.util.Locale;
30 
31 /**
32  * Transforms source text into an ALL CAPS string, locale-aware.
33  *
34  * @hide
35  */
36 public class AllCapsTransformationMethod implements TransformationMethod2 {
37     private static final String TAG = "AllCapsTransformationMethod";
38 
39     private boolean mEnabled;
40     private Locale mLocale;
41 
42     @UnsupportedAppUsage
AllCapsTransformationMethod(@onNull Context context)43     public AllCapsTransformationMethod(@NonNull Context context) {
44         mLocale = context.getResources().getConfiguration().getLocales().get(0);
45     }
46 
47     @Override
getTransformation(@ullable CharSequence source, View view)48     public CharSequence getTransformation(@Nullable CharSequence source, View view) {
49         if (!mEnabled) {
50             Log.w(TAG, "Caller did not enable length changes; not transforming text");
51             return source;
52         }
53 
54         if (source == null) {
55             return null;
56         }
57 
58         Locale locale = null;
59         if (view instanceof TextView) {
60             locale = ((TextView)view).getTextLocale();
61         }
62         if (locale == null) {
63             locale = mLocale;
64         }
65         final boolean copySpans = source instanceof Spanned;
66         return TextUtils.toUpperCase(locale, source, copySpans);
67     }
68 
69     @Override
onFocusChanged(View view, CharSequence sourceText, boolean focused, int direction, Rect previouslyFocusedRect)70     public void onFocusChanged(View view, CharSequence sourceText, boolean focused, int direction,
71             Rect previouslyFocusedRect) {
72     }
73 
74     @Override
setLengthChangesAllowed(boolean allowLengthChanges)75     public void setLengthChangesAllowed(boolean allowLengthChanges) {
76         mEnabled = allowLengthChanges;
77     }
78 
79 }
80