// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

namespace SixLabors.Fonts.Unicode {
  /// <summary>
  /// Unicode Indic_Positional_Category property values.
  /// <see href="https://www.unicode.org/reports/tr44/#Indic_Positional_Category"/>
  /// </summary>
  /// <remarks>
  /// These values describe the notional slot of dependent vowels, visible viramas, and related
  /// signs around an Indic syllable core. The property supplements
  /// <see cref="IndicSyllabicCategory"/> for shaping and segmentation, but it is not a
  /// prescriptive font-design or final glyph-placement property. <see cref="NA"/> is
  /// the default for code points whose syllabic role does not have a positional slot.
  /// </remarks>
  public enum IndicPositionalCategory
  {
      /// <summary>
      /// Bottom.
      /// </summary>
      Bottom = 0,

      /// <summary>
      /// Bottom_And_Left.
      /// </summary>
      BottomAndLeft = 1,

      /// <summary>
      /// Bottom_And_Right.
      /// </summary>
      BottomAndRight = 2,

      /// <summary>
      /// Left.
      /// </summary>
      Left = 3,

      /// <summary>
      /// Left_And_Right.
      /// </summary>
      LeftAndRight = 4,

      /// <summary>
      /// Overstruck.
      /// </summary>
      Overstruck = 6,

      /// <summary>
      /// Right.
      /// </summary>
      Right = 7,

      /// <summary>
      /// Top.
      /// </summary>
      Top = 8,

      /// <summary>
      /// Top_And_Bottom.
      /// </summary>
      TopAndBottom = 9,

      /// <summary>
      /// Top_And_Bottom_And_Left.
      /// </summary>
      TopAndBottomAndLeft = 10,

      /// <summary>
      /// Top_And_Bottom_And_Right.
      /// </summary>
      TopAndBottomAndRight = 11,

      /// <summary>
      /// Top_And_Left.
      /// </summary>
      TopAndLeft = 12,

      /// <summary>
      /// Top_And_Left_And_Right.
      /// </summary>
      TopAndLeftAndRight = 13,

      /// <summary>
      /// Top_And_Right.
      /// </summary>
      TopAndRight = 14,

      /// <summary>
      /// Visual_Order_Left.
      /// </summary>
      VisualOrderLeft = 15,

      /// <summary>
      /// Not applicable.
      /// </summary>
      /// <remarks>
      /// This is the Unicode fallback for code points without an explicit
      /// Indic_Positional_Category.
      /// </remarks>
      NA = 0xFF,
  }
}