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
17package 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 */
24public class HideReturnsTransformationMethod
25extends 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     */
32    protected char[] getOriginal() {
33        return ORIGINAL;
34    }
35
36    /**
37     * The character that \r is replaced with is \uFEFF.
38     */
39    protected char[] getReplacement() {
40        return REPLACEMENT;
41    }
42
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