1 /*
2  * Copyright (C) 2020 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.google.android.exoplayer2.text.span;
18 
19 /**
20  * A styling span for horizontal text in a vertical context.
21  *
22  * <p>This is used in vertical text to write some characters in a horizontal orientation, known in
23  * Japanese as tate-chu-yoko.
24  *
25  * <p>More information on <a
26  * href="https://www.w3.org/TR/jlreq/#handling_of_tatechuyoko">tate-chu-yoko</a> and <a
27  * href="https://developer.android.com/guide/topics/text/spans">span styling</a>.
28  */
29 // NOTE: There's no Android layout support for this, so this span currently doesn't extend any
30 // styling superclasses (e.g. MetricAffectingSpan). The only way to render this styling is to
31 // extract the spans and do the layout manually.
32 public final class HorizontalTextInVerticalContextSpan {}
33