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
19import android.graphics.Rect;
20import android.text.GetChars;
21import android.text.Spanned;
22import android.text.SpannedString;
23import android.text.TextUtils;
24import android.view.View;
25
26/**
27 * This transformation method causes any carriage return characters (\r)
28 * to be hidden by displaying them as zero-width non-breaking space
29 * characters (\uFEFF).
30 */
31public class HideReturnsTransformationMethod
32extends ReplacementTransformationMethod {
33    private static char[] ORIGINAL = new char[] { '\r' };
34    private static char[] REPLACEMENT = new char[] { '\uFEFF' };
35
36    /**
37     * The character to be replaced is \r.
38     */
39    protected char[] getOriginal() {
40        return ORIGINAL;
41    }
42
43    /**
44     * The character that \r is replaced with is \uFEFF.
45     */
46    protected char[] getReplacement() {
47        return REPLACEMENT;
48    }
49
50    public static HideReturnsTransformationMethod getInstance() {
51        if (sInstance != null)
52            return sInstance;
53
54        sInstance = new HideReturnsTransformationMethod();
55        return sInstance;
56    }
57
58    private static HideReturnsTransformationMethod sInstance;
59}
60