content: /*
   * Copyright 2021 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.google.android.exoplayer2.text.span;
  
  import static java.lang.annotation.ElementType.TYPE_USE;
  import static java.lang.annotation.RetentionPolicy.SOURCE;
  
  import androidx.annotation.IntDef;
  import java.lang.annotation.Documented;
  import java.lang.annotation.Retention;
  import java.lang.annotation.Target;
  
  /** Properties of a text annotation (i.e. ruby, text emphasis marks). */
  public final class TextAnnotation {
    /** The text annotation position is unknown. */
    public static final int POSITION_UNKNOWN = -1;
  
    /**
     * For horizontal text, the text annotation should be positioned above the base text.
     *
     * <p>For vertical text it should be positioned to the right, same as CSS's <a
     * href="https://developer.mozilla.org/en-US/docs/Web/CSS/ruby-position">ruby-position</a>.
     */
    public static final int POSITION_BEFORE = 1;
  
    /**
     * For horizontal text, the text annotation should be positioned below the base text.
     *
     * <p>For vertical text it should be positioned to the left, same as CSS's <a
     * href="https://developer.mozilla.org/en-US/docs/Web/CSS/ruby-position">ruby-position</a>.
     */
    public static final int POSITION_AFTER = 2;
  
    /**
     * The possible positions of the annotation text relative to the base text.
     *
     * <p>One of:
     *
     * <ul>
     *   <li>{@link #POSITION_UNKNOWN}
     *   <li>{@link #POSITION_BEFORE}
     *   <li>{@link #POSITION_AFTER}
     * </ul>
     */
    @Documented
    @Retention(SOURCE)
    @Target(TYPE_USE)
    @IntDef({POSITION_UNKNOWN, POSITION_BEFORE, POSITION_AFTER})
    public @interface Position {}
  
    private TextAnnotation() {}
  }
  