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;
18
19
20/**
21 * This is the class for text whose content and markup are immutable.
22 * For mutable markup, see {@link SpannableString}; for mutable text,
23 * see {@link SpannableStringBuilder}.
24 */
25public final class SpannedString
26extends SpannableStringInternal
27implements CharSequence, GetChars, Spanned
28{
29    /**
30     * @param source source object to copy from
31     * @param ignoreNoCopySpan whether to copy NoCopySpans in the {@code source}
32     * @hide
33     */
34    public SpannedString(CharSequence source, boolean ignoreNoCopySpan) {
35        super(source, 0, source.length(), ignoreNoCopySpan);
36    }
37
38    /**
39     * For the backward compatibility reasons, this constructor copies all spans including {@link
40     * android.text.NoCopySpan}.
41     * @param source source text
42     */
43    public SpannedString(CharSequence source) {
44        this(source, false /* ignoreNoCopySpan */);  // preserve existing NoCopySpan behavior
45    }
46
47    private SpannedString(CharSequence source, int start, int end) {
48        // preserve existing NoCopySpan behavior
49        super(source, start, end, false /* ignoreNoCopySpan */);
50    }
51
52    public CharSequence subSequence(int start, int end) {
53        return new SpannedString(this, start, end);
54    }
55
56    public static SpannedString valueOf(CharSequence source) {
57        if (source instanceof SpannedString) {
58            return (SpannedString) source;
59        } else {
60            return new SpannedString(source);
61        }
62    }
63}
64