Adding TransferSpeedColumn configuration to display bits/bytes + binary/decimal prefixes

src/Spectre.Console/Internal/FileSize.cs

@@ -3,33 +3,61 @@ namespace Spectre.Console;
 internal struct FileSize
 {
     public double Bytes { get; }
-    public FileSizeUnit Unit { get; }
+    public double Bits => Bytes * 8;
+
+    public FileSizePrefix Prefix { get; } = FileSizePrefix.None;
+
+    private readonly FileSizeBase _prefixBase = FileSizeBase.Binary;
+
+    /// <summary>
+    /// If enabled, will display the output in bits, rather than bytes.
+    /// </summary>
+    private readonly bool _showBits = false;
+
     public string Suffix => GetSuffix();
 
     public FileSize(double bytes)
     {
         Bytes = bytes;
-        Unit = Detect(bytes);
+        Prefix = DetectPrefix(bytes);
+    }
+
+    public FileSize(double bytes, FileSizeBase prefix)
+    {
+        Bytes = bytes;
+        _prefixBase = prefix;
+        Prefix = DetectPrefix(bytes);
+    }
+
+    public FileSize(double bytes, FileSizeBase prefix, bool showBits)
+    {
+        Bytes = bytes;
+        _prefixBase = prefix;
+        _showBits = showBits;
+        Prefix = DetectPrefix(bytes);
     }
 
-    public FileSize(double bytes, FileSizeUnit unit)
+    public FileSize(double bytes, FileSizePrefix prefix)
     {
         Bytes = bytes;
-        Unit = unit;
+        Prefix = prefix;
     }
 
     public string Format(CultureInfo? culture = null)
     {
-        var @base = GetBase(Unit);
-        if (@base == 0)
+        var unitBase = Math.Pow((int)_prefixBase, (int)Prefix);
+
+        if (_showBits)
         {
-            @base = 1;
+            var bits = Bits / unitBase;
+            return Prefix == FileSizePrefix.None ?
+                ((int)bits).ToString(culture ?? CultureInfo.InvariantCulture)
+                : bits.ToString("F1", culture ?? CultureInfo.InvariantCulture);
         }
 
-        var bytes = Bytes / @base;
-
-        return Unit == FileSizeUnit.Byte
-            ? ((int)bytes).ToString(culture ?? CultureInfo.InvariantCulture)
+        var bytes = Bytes / unitBase;
+        return Prefix == FileSizePrefix.None ?
+            ((int)bytes).ToString(culture ?? CultureInfo.InvariantCulture)
             : bytes.ToString("F1", culture ?? CultureInfo.InvariantCulture);
     }
 
@@ -50,36 +78,67 @@ public string ToString(bool suffix = true, CultureInfo? culture = null)
 
     private string GetSuffix()
     {
-        return (Bytes, Unit) switch
+        return (Bytes, Unit: Prefix, PrefixBase: _prefixBase, ShowBits: _showBits) switch
         {
-            (_, FileSizeUnit.KiloByte) => "KB",
-            (_, FileSizeUnit.MegaByte) => "MB",
-            (_, FileSizeUnit.GigaByte) => "GB",
-            (_, FileSizeUnit.TeraByte) => "TB",
-            (_, FileSizeUnit.PetaByte) => "PB",
-            (_, FileSizeUnit.ExaByte) => "EB",
-            (_, FileSizeUnit.ZettaByte) => "ZB",
-            (_, FileSizeUnit.YottaByte) => "YB",
-            (1, _) => "byte",
-            (_, _) => "bytes",
+            (_, FileSizePrefix.Kilo, FileSizeBase.Binary, false) => "KiB",
+            (_, FileSizePrefix.Mega, FileSizeBase.Binary, false) => "MiB",
+            (_, FileSizePrefix.Giga, FileSizeBase.Binary, false) => "GiB",
+            (_, FileSizePrefix.Tera, FileSizeBase.Binary, false) => "TiB",
+            (_, FileSizePrefix.Peta, FileSizeBase.Binary, false) => "PiB",
+            (_, FileSizePrefix.Exa, FileSizeBase.Binary, false) => "EiB",
+            (_, FileSizePrefix.Zetta, FileSizeBase.Binary, false) => "ZiB",
+            (_, FileSizePrefix.Yotta, FileSizeBase.Binary, false) => "YiB",
+
+            (_, FileSizePrefix.Kilo, FileSizeBase.Binary, true) => "Kibit",
+            (_, FileSizePrefix.Mega, FileSizeBase.Binary, true) => "Mibit",
+            (_, FileSizePrefix.Giga, FileSizeBase.Binary, true) => "Gibit",
+            (_, FileSizePrefix.Tera, FileSizeBase.Binary, true) => "Tibit",
+            (_, FileSizePrefix.Peta, FileSizeBase.Binary, true) => "Pibit",
+            (_, FileSizePrefix.Exa, FileSizeBase.Binary, true) => "Eibit",
+            (_, FileSizePrefix.Zetta, FileSizeBase.Binary, true) => "Zibit",
+            (_, FileSizePrefix.Yotta, FileSizeBase.Binary, true) => "Yibit",
+
+            (_, FileSizePrefix.Kilo, FileSizeBase.Decimal, false) => "KB",
+            (_, FileSizePrefix.Mega, FileSizeBase.Decimal, false) => "MB",
+            (_, FileSizePrefix.Giga, FileSizeBase.Decimal, false) => "GB",
+            (_, FileSizePrefix.Tera, FileSizeBase.Decimal, false) => "TB",
+            (_, FileSizePrefix.Peta, FileSizeBase.Decimal, false) => "PB",
+            (_, FileSizePrefix.Exa, FileSizeBase.Decimal, false) => "EB",
+            (_, FileSizePrefix.Zetta, FileSizeBase.Decimal, false) => "ZB",
+            (_, FileSizePrefix.Yotta, FileSizeBase.Decimal, false) => "YB",
+
+            (_, FileSizePrefix.Kilo, FileSizeBase.Decimal, true) => "Kbit",
+            (_, FileSizePrefix.Mega, FileSizeBase.Decimal, true) => "Mbit",
+            (_, FileSizePrefix.Giga, FileSizeBase.Decimal, true) => "Gbit",
+            (_, FileSizePrefix.Tera, FileSizeBase.Decimal, true) => "Tbit",
+            (_, FileSizePrefix.Peta, FileSizeBase.Decimal, true) => "Pbit",
+            (_, FileSizePrefix.Exa, FileSizeBase.Decimal, true) => "Ebit",
+            (_, FileSizePrefix.Zetta, FileSizeBase.Decimal, true) => "Zbit",
+            (_, FileSizePrefix.Yotta, FileSizeBase.Decimal, true) => "Ybit",
+
+            (1, _, _, true) => "bit",
+            (_, _, _, true) => "bits",
+            (1, _, _, false) => "byte",
+            (_, _, _, false) => "bytes",
         };
     }
 
-    private static FileSizeUnit Detect(double bytes)
+    private FileSizePrefix DetectPrefix(double bytes)
     {
-        foreach (var unit in (FileSizeUnit[])Enum.GetValues(typeof(FileSizeUnit)))
+        if (_showBits)
         {
-            if (bytes < (GetBase(unit) * 1024))
+            bytes *= 8;
+        }
+
+        foreach (var prefix in (FileSizePrefix[])Enum.GetValues(typeof(FileSizePrefix)))
+        {
+            // Trying to find the largest unit, that the number of bytes can fit under. Ex. 40kb < 1mb
+            if (bytes < Math.Pow((int)_prefixBase, (int)prefix + 1))
             {
-                return unit;
+                return prefix;
             }
         }
 
-        return FileSizeUnit.Byte;
-    }
-
-    private static double GetBase(FileSizeUnit unit)
-    {
-        return Math.Pow(1024, (int)unit);
+        return FileSizePrefix.None;
     }
 }

src/Spectre.Console/Internal/FileSizeBase.cs

@@ -0,0 +1,17 @@
+namespace Spectre.Console;
+
+/// <summary>
+/// Determines possible file size base prefixes.  (base 2/base 10).
+/// </summary>
+public enum FileSizeBase
+{
+    /// <summary>
+    /// The SI prefix definition (base 10) of kilobyte, megabyte, etc.
+    /// </summary>
+    Decimal = 1000,
+
+    /// <summary>
+    /// The IEC binary prefix definition (base 2) of kibibyte, mebibyte, etc.
+    /// </summary>
+    Binary = 1024,
+}

src/Spectre.Console/Internal/FileSizePrefix.cs

@@ -0,0 +1,14 @@
+namespace Spectre.Console;
+
+internal enum FileSizePrefix
+{
+    None = 0,
+    Kilo = 1,
+    Mega = 2,
+    Giga = 3,
+    Tera = 4,
+    Peta = 5,
+    Exa = 6,
+    Zetta = 7,
+    Yotta = 8,
+}

src/Spectre.Console/Live/Progress/Columns/DownloadedColumn.cs

@@ -10,10 +10,20 @@ public sealed class DownloadedColumn : ProgressColumn
     /// </summary>
     public CultureInfo? Culture { get; set; }
 
+    /// <summary>
+    /// Gets or sets the <see cref="FileSizeBase"/> to use.
+    /// </summary>
+    public FileSizeBase Base { get; set; } = FileSizeBase.Binary;
+
+    /// <summary>
+    /// Gets or sets a value indicating whether to display the transfer speed in bits.
+    /// </summary>
+    public bool DisplayBits { get; set; }
+
     /// <inheritdoc/>
     public override IRenderable Render(RenderOptions options, ProgressTask task, TimeSpan deltaTime)
     {
-        var total = new FileSize(task.MaxValue);
+        var total = new FileSize(task.MaxValue, Base, DisplayBits);
 
         if (task.IsFinished)
         {
@@ -24,7 +34,7 @@ public override IRenderable Render(RenderOptions options, ProgressTask task, Tim
         }
         else
         {
-            var downloaded = new FileSize(task.Value, total.Unit);
+            var downloaded = new FileSize(task.Value, total.Prefix);
 
             return new Markup(string.Format(
                 "{0}[grey]/[/]{1} [grey]{2}[/]",

src/Spectre.Console/Live/Progress/Columns/TransferSpeedColumn.cs

@@ -10,6 +10,16 @@ public sealed class TransferSpeedColumn : ProgressColumn
     /// </summary>
     public CultureInfo? Culture { get; set; }
 
+    /// <summary>
+    /// Gets or sets the <see cref="FileSizeBase"/> to use.
+    /// </summary>
+    public FileSizeBase Base { get; set; } = FileSizeBase.Binary;
+
+    /// <summary>
+    /// Gets or sets a value indicating whether to display the transfer speed in bits.
+    /// </summary>
+    public bool DisplayBits { get; set; }
+
     /// <inheritdoc/>
     public override IRenderable Render(RenderOptions options, ProgressTask task, TimeSpan deltaTime)
     {
@@ -18,7 +28,7 @@ public override IRenderable Render(RenderOptions options, ProgressTask task, Tim
             return new Text("?/s");
         }
 
-        var size = new FileSize(task.Speed.Value);
+        var size = new FileSize(task.Speed.Value, Base, DisplayBits);
         return new Markup(string.Format("{0}/s", size.ToString(suffix: true, Culture)));
     }
 }

src/Tests/Spectre.Console.Tests/Unit/Internal/FileSizeTests.cs

@@ -0,0 +1,85 @@
+namespace Spectre.Console.Tests.Unit.Internal;
+
+public sealed class FileSizeTests
+{
+    [Theory]
+    [InlineData(0, "0 bytes")]
+    [InlineData(37, "37 bytes")]
+    [InlineData(512, "512 bytes")]
+    [InlineData(15 * 1024, "15.0 KiB")]
+    [InlineData(1024 * 512, "512.0 KiB")]
+    [InlineData(5 * 1024 * 1024, "5.0 MiB")]
+    [InlineData(9 * 1024 * 1024, "9.0 MiB")]
+    public void Binary_Unit_In_Bytes_Should_Return_Expected(double bytes, string expected)
+    {
+        // Given
+        var filesize = new FileSize(bytes, FileSizeBase.Binary);
+
+        // When
+        var result = filesize.ToString();
+
+        // Then
+        result.ShouldBe(expected);
+    }
+
+    [Theory]
+    [InlineData(0, "0 bits")]
+    [InlineData(37, "296 bits")]
+    [InlineData(512, "4.0 Kibit")]
+    [InlineData(15 * 1024, "120.0 Kibit")]
+    [InlineData(1024 * 512, "4.0 Mibit")]
+    [InlineData(5 * 1024 * 1024, "40.0 Mibit")]
+    [InlineData(210 * 1024 * 1024, "1.6 Gibit")]
+    [InlineData(900 * 1024 * 1024, "7.0 Gibit")]
+    public void Binary_Unit_In_Bits_Should_Return_Expected(double bytes, string expected)
+    {
+        // Given
+        var filesize = new FileSize(bytes, FileSizeBase.Binary, displayBits: true);
+
+        // When
+        var result = filesize.ToString();
+
+        // Then
+        result.ShouldBe(expected);
+    }
+
+    [Theory]
+    [InlineData(0, "0 bytes")]
+    [InlineData(37, "37 bytes")]
+    [InlineData(512, "512 bytes")]
+    [InlineData(15 * 1024, "15.4 KB")]
+    [InlineData(1024 * 512, "524.3 KB")]
+    [InlineData(5 * 1024 * 1024, "5.2 MB")]
+    [InlineData(9 * 1024 * 1024, "9.4 MB")]
+    public void Decimal_Unit_In_Bytes_Should_Return_Expected(double bytes, string expected)
+    {
+        // Given
+        var filesize = new FileSize(bytes, FileSizeBase.Decimal);
+
+        // When
+        var result = filesize.ToString();
+
+        // Then
+        result.ShouldBe(expected);
+    }
+
+    [Theory]
+    [InlineData(0, "0 bits")]
+    [InlineData(37, "296 bits")]
+    [InlineData(512, "4.1 Kbit")]
+    [InlineData(15 * 1024, "122.9 Kbit")]
+    [InlineData(1024 * 512, "4.2 Mbit")]
+    [InlineData(5 * 1024 * 1024, "41.9 Mbit")]
+    [InlineData(900 * 1024 * 1024, "7.5 Gbit")]
+    public void Decimal_Unit_In_Bits_Should_Return_Expected(double bytes, string expected)
+    {
+        // Given
+        var filesize = new FileSize(bytes, FileSizeBase.Decimal, displayBits: true);
+
+        // When
+        var result = filesize.ToString();
+
+        // Then
+        result.ShouldBe(expected);
+    }
+}

src/Tests/Spectre.Console.Tests/Unit/Live/Progress/DownloadedColumnTests.cs

@@ -6,10 +6,10 @@ public sealed class DownloadedColumnTests
     [InlineData(0, 1, "0/1 byte")]
     [InlineData(37, 101, "37/101 bytes")]
     [InlineData(101, 101, "101 bytes")]
-    [InlineData(512, 1024, "0.5/1.0 KB")]
-    [InlineData(1024, 1024, "1.0 KB")]
-    [InlineData(1024 * 512, 5 * 1024 * 1024, "0.5/5.0 MB")]
-    [InlineData(5 * 1024 * 1024, 5 * 1024 * 1024, "5.0 MB")]
+    [InlineData(512, 1024, "0.5/1.0 KiB")]
+    [InlineData(1024, 1024, "1.0 KiB")]
+    [InlineData(1024 * 512, 5 * 1024 * 1024, "0.5/5.0 MiB")]
+    [InlineData(5 * 1024 * 1024, 5 * 1024 * 1024, "5.0 MiB")]
     public void Should_Return_Correct_Value(double value, double total, string expected)
     {
         // Given