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

namespace SixLabors.Fonts.Tables.Cff {
  /// <summary>
  /// Represents an element in an font dictionary array.
  /// </summary>
  internal readonly struct FDRange
  {
      /// <summary>
      /// Initializes a new instance of the <see cref="FDRange"/> struct for FDSelect format 3.
      /// </summary>
      /// <param name="first">The first glyph index in the range.</param>
      /// <param name="fontDictionary">The font dictionary index for glyphs in this range.</param>
      public FDRange(ushort first, byte fontDictionary)
      {
          this.First = first;
          this.FontDictionary = fontDictionary;
      }

      /// <summary>
      /// Initializes a new instance of the <see cref="FDRange"/> struct for FDSelect format 4.
      /// </summary>
      /// <param name="first">The first glyph index in the range.</param>
      /// <param name="fontDictionary">The font dictionary index for glyphs in this range.</param>
      public FDRange(uint first, ushort fontDictionary)
      {
          this.First = first;
          this.FontDictionary = fontDictionary;
      }

      /// <summary>
      /// Gets the first glyph index in range.
      /// </summary>
      public uint First { get; }

      /// <summary>
      /// Gets the font dictionary index for all glyphs in range.
      /// </summary>
      public ushort FontDictionary { get; }

      /// <inheritdoc/>
      public override string ToString() => $"First {this.First}, Dictionary {this.FontDictionary}.";
  }
}