1 /*
2  * Copyright (C) 2006 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 android.text.method;
18 
19 /**
20  * This transformation method causes any carriage return characters (\r)
21  * to be hidden by displaying them as zero-width non-breaking space
22  * characters (\uFEFF).
23  */
24 public class HideReturnsTransformationMethod
25 extends ReplacementTransformationMethod {
26     private static char[] ORIGINAL = new char[] { '\r' };
27     private static char[] REPLACEMENT = new char[] { '\uFEFF' };
28 
29     /**
30      * The character to be replaced is \r.
31      */
getOriginal()32     protected char[] getOriginal() {
33         return ORIGINAL;
34     }
35 
36     /**
37      * The character that \r is replaced with is \uFEFF.
38      */
getReplacement()39     protected char[] getReplacement() {
40         return REPLACEMENT;
41     }
42 
getInstance()43     public static HideReturnsTransformationMethod getInstance() {
44         if (sInstance != null)
45             return sInstance;
46 
47         sInstance = new HideReturnsTransformationMethod();
48         return sInstance;
49     }
50 
51     private static HideReturnsTransformationMethod sInstance;
52 }
53