1 /*
2  * Copyright (C) 2016 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 com.android.setupwizardlib.span;
18 
19 import android.text.Spannable;
20 
21 /**
22  * Contains helper methods for dealing with text spans, e.g. the ones in {@code android.text.style}.
23  */
24 public class SpanHelper {
25 
26     /**
27      * Add {@code newSpan} at the same start and end indices as {@code oldSpan} and remove
28      * {@code oldSpan} from the {@code spannable}.
29      */
replaceSpan(Spannable spannable, Object oldSpan, Object newSpan)30     public static void replaceSpan(Spannable spannable, Object oldSpan, Object newSpan) {
31         final int spanStart = spannable.getSpanStart(oldSpan);
32         final int spanEnd = spannable.getSpanEnd(oldSpan);
33         spannable.removeSpan(oldSpan);
34         spannable.setSpan(newSpan, spanStart, spanEnd, 0);
35     }
36 }
37