Steven Kirk
7 years ago
committed by
GitHub
GitHub
10 changed files with 346 additions and 42 deletions
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using System; |
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using System.Globalization; |
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using System.Runtime.InteropServices; |
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using System.Text; |
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using Avalonia.Data.Converters; |
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using Avalonia.Input; |
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namespace Avalonia.Controls.Converters |
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{ |
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/// <summary>
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/// Converts a <see cref="KeyGesture"/> to a string, formatting it according to the current
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/// platform's style guidelines.
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/// </summary>
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public class PlatformKeyGestureConverter : IValueConverter |
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{ |
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture) |
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{ |
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if (value is null) |
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{ |
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return null; |
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} |
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else if (value is KeyGesture gesture && targetType == typeof(string)) |
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{ |
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return ToPlatformString(gesture); |
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} |
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else |
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{ |
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throw new NotSupportedException(); |
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} |
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} |
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) |
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{ |
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throw new NotImplementedException(); |
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} |
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/// <summary>
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/// Converts a <see cref="KeyGesture"/> to a string, formatting it according to the current
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/// platform's style guidelines.
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/// </summary>
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/// <param name="gesture">The gesture.</param>
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/// <returns>The gesture formatted according to the current platform.</returns>
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public static string ToPlatformString(KeyGesture gesture) |
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{ |
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if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) |
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{ |
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return ToString(gesture, "Win"); |
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} |
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else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) |
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{ |
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return ToString(gesture, "Super"); |
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} |
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else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) |
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{ |
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return ToOSXString(gesture); |
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} |
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else |
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{ |
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return gesture.ToString(); |
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} |
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} |
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private static string ToString(KeyGesture gesture, string meta) |
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{ |
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var s = new StringBuilder(); |
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static void Plus(StringBuilder s) |
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{ |
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if (s.Length > 0) |
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{ |
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s.Append("+"); |
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} |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Control)) |
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{ |
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s.Append("Ctrl"); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Shift)) |
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{ |
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Plus(s); |
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s.Append("Shift"); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Alt)) |
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{ |
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Plus(s); |
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s.Append("Alt"); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Meta)) |
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{ |
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Plus(s); |
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s.Append(meta); |
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} |
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Plus(s); |
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s.Append(ToString(gesture.Key)); |
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return s.ToString(); |
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} |
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private static string ToOSXString(KeyGesture gesture) |
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{ |
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var s = new StringBuilder(); |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Control)) |
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{ |
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s.Append('⌃'); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Alt)) |
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{ |
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s.Append('⌥'); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Shift)) |
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{ |
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s.Append('⇧'); |
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} |
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if (gesture.KeyModifiers.HasFlagCustom(KeyModifiers.Meta)) |
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{ |
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s.Append('⌘'); |
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} |
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s.Append(ToOSXString(gesture.Key)); |
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return s.ToString(); |
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} |
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private static string ToString(Key key) |
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{ |
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return key switch |
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{ |
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Key.Add => "+", |
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Key.Back => "Backspace", |
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Key.D0 => "0", |
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Key.D1 => "1", |
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Key.D2 => "2", |
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Key.D3 => "3", |
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Key.D4 => "4", |
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Key.D5 => "5", |
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Key.D6 => "6", |
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Key.D7 => "7", |
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Key.D8 => "8", |
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Key.D9 => "9", |
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Key.Decimal => ".", |
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Key.Divide => "/", |
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Key.Down => "Down Arrow", |
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Key.Left => "Left Arrow", |
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Key.Multiply => "*", |
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Key.OemBackslash => "\\", |
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Key.OemCloseBrackets => "]", |
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Key.OemComma => ",", |
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Key.OemMinus => "-", |
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Key.OemOpenBrackets => "[", |
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Key.OemPeriod=> ".", |
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Key.OemPipe => "|", |
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Key.OemPlus => "+", |
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Key.OemQuestion => "/", |
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Key.OemQuotes => "\"", |
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Key.OemSemicolon => ";", |
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Key.OemTilde => "`", |
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Key.Right => "Right Arrow", |
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Key.Separator => "/", |
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Key.Subtract => "-", |
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Key.Up => "Up Arrow", |
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_ => key.ToString(), |
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}; |
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} |
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private static string ToOSXString(Key key) |
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{ |
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return key switch |
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{ |
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Key.Back => "⌫", |
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Key.Down => "↓", |
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Key.End => "↘", |
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Key.Escape => "⎋", |
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Key.Home => "↖", |
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Key.Left => "←", |
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Key.Return => "↩", |
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Key.PageDown => "⇞", |
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Key.PageUp => "⇟", |
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Key.Right => "→", |
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Key.Space => "␣", |
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Key.Tab => "⇥", |
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Key.Up => "↑", |
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_ => ToString(key), |
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}; |
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} |
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} |
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} |
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