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Aaru/Aaru.Tui/Controls/SpectreTextBlock.cs

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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Text User Interface.
//
// --[ License ] --------------------------------------------------------------
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2025 Natalia Portillo
// ****************************************************************************/
using System.Text.RegularExpressions;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Documents;
using Avalonia.Media;
namespace Aaru.Tui.Controls;
public partial class SpectreTextBlock : TextBlock
{
// Matches color formats like:
// "red on blue", "#ff0000 on blue", "rgb(255,0,0) on blue", etc.
private static readonly Regex _colorMarkupRegex = ColorRegex();
// Static mapping of Spectre Console color names to hex values
private static readonly Dictionary<string, string> _spectreColorMap = new(StringComparer.OrdinalIgnoreCase)
{
// Standard colors (0-15)
["black"] = "#000000",
["maroon"] = "#800000",
["green"] = "#008000",
["olive"] = "#808000",
["navy"] = "#000080",
["purple"] = "#800080",
["teal"] = "#008080",
["silver"] = "#c0c0c0",
["grey"] = "#808080",
["red"] = "#ff0000",
["lime"] = "#00ff00",
["yellow"] = "#ffff00",
["blue"] = "#0000ff",
["fuchsia"] = "#ff00ff",
["aqua"] = "#00ffff",
["white"] = "#ffffff",
// Extended colors (16-255)
["grey0"] = "#000000",
["navyblue"] = "#00005f",
["darkblue"] = "#000087",
["blue3"] = "#0000af",
["blue3_1"] = "#0000d7",
["blue1"] = "#0000ff",
["darkgreen"] = "#005f00",
["deepskyblue4"] = "#005f5f",
["deepskyblue4_1"] = "#005f87",
["deepskyblue4_2"] = "#005faf",
["dodgerblue3"] = "#005fd7",
["dodgerblue2"] = "#005fff",
["green4"] = "#008700",
["springgreen4"] = "#00875f",
["turquoise4"] = "#008787",
["deepskyblue3"] = "#0087af",
["deepskyblue3_1"] = "#0087d7",
["dodgerblue1"] = "#0087ff",
["green3"] = "#00af00",
["springgreen3"] = "#00af5f",
["darkcyan"] = "#00af87",
["lightseagreen"] = "#00afaf",
["deepskyblue2"] = "#00afd7",
["deepskyblue1"] = "#00afff",
["green3_1"] = "#00d700",
["springgreen3_1"] = "#00d75f",
["springgreen2"] = "#00d787",
["cyan3"] = "#00d7af",
["darkturquoise"] = "#00d7d7",
["turquoise2"] = "#00d7ff",
["green1"] = "#00ff00",
["springgreen2_1"] = "#00ff5f",
["springgreen1"] = "#00ff87",
["mediumspringgreen"] = "#00ffaf",
["cyan2"] = "#00ffd7",
["cyan1"] = "#00ffff",
["darkred"] = "#5f0000",
["deeppink4"] = "#5f005f",
["purple4"] = "#5f0087",
["purple4_1"] = "#5f00af",
["purple3"] = "#5f00d7",
["blueviolet"] = "#5f00ff",
["orange4"] = "#5f5f00",
["grey37"] = "#5f5f5f",
["mediumpurple4"] = "#5f5f87",
["slateblue3"] = "#5f5faf",
["slateblue3_1"] = "#5f5fd7",
["royalblue1"] = "#5f5fff",
["chartreuse4"] = "#5f8700",
["darkseagreen4"] = "#5f875f",
["paleturquoise4"] = "#5f8787",
["steelblue"] = "#5f87af",
["steelblue3"] = "#5f87d7",
["cornflowerblue"] = "#5f87ff",
["chartreuse3"] = "#5faf00",
["darkseagreen4_1"] = "#5faf5f",
["cadetblue"] = "#5faf87",
["cadetblue_1"] = "#5fafaf",
["skyblue3"] = "#5fafd7",
["steelblue1"] = "#5fafff",
["chartreuse3_1"] = "#5fd700",
["palegreen3"] = "#5fd75f",
["seagreen3"] = "#5fd787",
["aquamarine3"] = "#5fd7af",
["mediumturquoise"] = "#5fd7d7",
["steelblue1_1"] = "#5fd7ff",
["chartreuse2"] = "#5fff00",
["seagreen2"] = "#5fff5f",
["seagreen1"] = "#5fff87",
["seagreen1_1"] = "#5fffaf",
["aquamarine1"] = "#5fffd7",
["darkslategray2"] = "#5fffff",
["darkred_1"] = "#870000",
["deeppink4_1"] = "#87005f",
["darkmagenta"] = "#870087",
["darkmagenta_1"] = "#8700af",
["darkviolet"] = "#8700d7",
["purple_1"] = "#8700ff",
["orange4_1"] = "#875f00",
["lightpink4"] = "#875f5f",
["plum4"] = "#875f87",
["mediumpurple3"] = "#875faf",
["mediumpurple3_1"] = "#875fd7",
["slateblue1"] = "#875fff",
["yellow4"] = "#878700",
["wheat4"] = "#87875f",
["grey53"] = "#878787",
["lightslategrey"] = "#8787af",
["mediumpurple"] = "#8787d7",
["lightslateblue"] = "#8787ff",
["yellow4_1"] = "#87af00",
["darkolivegreen3"] = "#87af5f",
["darkseagreen"] = "#87af87",
["lightskyblue3"] = "#87afaf",
["lightskyblue3_1"] = "#87afd7",
["skyblue2"] = "#87afff",
["chartreuse2_1"] = "#87d700",
["darkolivegreen3_1"] = "#87d75f",
["palegreen3_1"] = "#87d787",
["darkseagreen3"] = "#87d7af",
["darkslategray3"] = "#87d7d7",
["skyblue1"] = "#87d7ff",
["chartreuse1"] = "#87ff00",
["lightgreen"] = "#87ff5f",
["lightgreen_1"] = "#87ff87",
["palegreen1"] = "#87ffaf",
["aquamarine1_1"] = "#87ffd7",
["darkslategray1"] = "#87ffff",
["red3"] = "#af0000",
["deeppink4_2"] = "#af005f",
["mediumvioletred"] = "#af0087",
["magenta3"] = "#af00af",
["darkviolet_1"] = "#af00d7",
["purple_2"] = "#af00ff",
["darkorange3"] = "#af5f00",
["indianred"] = "#af5f5f",
["hotpink3"] = "#af5f87",
["mediumorchid3"] = "#af5faf",
["mediumorchid"] = "#af5fd7",
["mediumpurple2"] = "#af5fff",
["darkgoldenrod"] = "#af8700",
["lightsalmon3"] = "#af875f",
["rosybrown"] = "#af8787",
["grey63"] = "#af87af",
["mediumpurple2_1"] = "#af87d7",
["mediumpurple1"] = "#af87ff",
["gold3"] = "#afaf00",
["darkkhaki"] = "#afaf5f",
["navajowhite3"] = "#afaf87",
["grey69"] = "#afafaf",
["lightsteelblue3"] = "#afafd7",
["lightsteelblue"] = "#afafff",
["yellow3"] = "#afd700",
["darkolivegreen3_2"] = "#afd75f",
["darkseagreen3_1"] = "#afd787",
["darkseagreen2"] = "#afd7af",
["lightcyan3"] = "#afd7d7",
["lightskyblue1"] = "#afd7ff",
["greenyellow"] = "#afff00",
["darkolivegreen2"] = "#afff5f",
["palegreen1_1"] = "#afff87",
["darkseagreen2_1"] = "#afffaf",
["darkseagreen1"] = "#afffd7",
["paleturquoise1"] = "#afffff",
["red3_1"] = "#d70000",
["deeppink3"] = "#d7005f",
["deeppink3_1"] = "#d70087",
["magenta3_1"] = "#d700af",
["magenta3_2"] = "#d700d7",
["magenta2"] = "#d700ff",
["darkorange3_1"] = "#d75f00",
["indianred_1"] = "#d75f5f",
["hotpink3_1"] = "#d75f87",
["hotpink2"] = "#d75faf",
["orchid"] = "#d75fd7",
["mediumorchid1"] = "#d75fff",
["orange3"] = "#d78700",
["lightsalmon3_1"] = "#d7875f",
["lightpink3"] = "#d78787",
["pink3"] = "#d787af",
["plum3"] = "#d787d7",
["violet"] = "#d787ff",
["gold3_1"] = "#d7af00",
["lightgoldenrod3"] = "#d7af5f",
["tan"] = "#d7af87",
["mistyrose3"] = "#d7afaf",
["thistle3"] = "#d7afd7",
["plum2"] = "#d7afff",
["yellow3_1"] = "#d7d700",
["khaki3"] = "#d7d75f",
["lightgoldenrod2"] = "#d7d787",
["lightyellow3"] = "#d7d7af",
["grey84"] = "#d7d7d7",
["lightsteelblue1"] = "#d7d7ff",
["yellow2"] = "#d7ff00",
["darkolivegreen1"] = "#d7ff5f",
["darkolivegreen1_1"] = "#d7ff87",
["darkseagreen1_1"] = "#d7ffaf",
["honeydew2"] = "#d7ffd7",
["lightcyan1"] = "#d7ffff",
["red1"] = "#ff0000",
["deeppink2"] = "#ff005f",
["deeppink1"] = "#ff0087",
["deeppink1_1"] = "#ff00af",
["magenta2_1"] = "#ff00d7",
["magenta1"] = "#ff00ff",
["orangered1"] = "#ff5f00",
["indianred1"] = "#ff5f5f",
["indianred1_1"] = "#ff5f87",
["hotpink"] = "#ff5faf",
["hotpink_1"] = "#ff5fd7",
["mediumorchid1_1"] = "#ff5fff",
["darkorange"] = "#ff8700",
["salmon1"] = "#ff875f",
["lightcoral"] = "#ff8787",
["palevioletred1"] = "#ff87af",
["orchid2"] = "#ff87d7",
["orchid1"] = "#ff87ff",
["orange1"] = "#ffaf00",
["sandybrown"] = "#ffaf5f",
["lightsalmon1"] = "#ffaf87",
["lightpink1"] = "#ffafaf",
["pink1"] = "#ffafd7",
["plum1"] = "#ffafff",
["gold1"] = "#ffd700",
["lightgoldenrod2_1"] = "#ffd75f",
["lightgoldenrod2_2"] = "#ffd787",
["navajowhite1"] = "#ffd7af",
["mistyrose1"] = "#ffd7d7",
["thistle1"] = "#ffd7ff",
["yellow1"] = "#ffff00",
["lightgoldenrod1"] = "#ffff5f",
["khaki1"] = "#ffff87",
["wheat1"] = "#ffffaf",
["cornsilk1"] = "#ffffd7",
["grey100"] = "#ffffff",
["grey3"] = "#080808",
["grey7"] = "#121212",
["grey11"] = "#1c1c1c",
["grey15"] = "#262626",
["grey19"] = "#303030",
["grey23"] = "#3a3a3a",
["grey27"] = "#444444",
["grey30"] = "#4e4e4e",
["grey35"] = "#585858",
["grey39"] = "#626262",
["grey42"] = "#6c6c6c",
["grey46"] = "#767676",
["grey50"] = "#808080",
["grey54"] = "#8a8a8a",
["grey58"] = "#949494",
["grey62"] = "#9e9e9e",
["grey66"] = "#a8a8a8",
["grey70"] = "#b2b2b2",
["grey74"] = "#bcbcbc",
["grey78"] = "#c6c6c6",
["grey82"] = "#d0d0d0",
["grey85"] = "#dadada",
["grey89"] = "#e4e4e4",
["grey93"] = "#eeeeee"
};
protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
{
base.OnPropertyChanged(change);
if(change.Property == TextProperty) UpdateMarkup();
}
void UpdateMarkup()
{
if(string.IsNullOrEmpty(Text))
{
Inlines?.Clear();
return;
}
var inlines = new InlineCollection();
List<MarkupTag> markups = ParseMarkups(Text);
if(markups.Count == 0)
{
inlines.Add(new Run(Text));
Inlines = inlines;
return;
}
// Create a list of tag ranges to exclude from the text
var tagRanges = new List<(int start, int end)>();
foreach(MarkupTag markup in markups)
{
// Add opening tag range
tagRanges.Add((markup.Start, markup.OpenTagEnd));
// Add closing tag range
tagRanges.Add((markup.CloseTagStart, markup.End));
}
// Create breakpoints at all positions (start, end of tags, start and end of text)
var breakpoints = new SortedSet<int>
{
0,
Text.Length
};
// Add all tag boundaries as breakpoints
foreach((int start, int end) range in tagRanges)
{
breakpoints.Add(range.start);
breakpoints.Add(range.end);
}
var breakpointList = breakpoints.ToList();
for(var i = 0; i < breakpointList.Count - 1; i++)
{
int start = breakpointList[i];
int end = breakpointList[i + 1];
// Skip empty segments
if(start == end) continue;
// Skip this segment if it overlaps with any tag range
bool isInsideTag = tagRanges.Any(range => start >= range.start && start < range.end ||
end > range.start && end <= range.end ||
start <= range.start && end >= range.end);
if(isInsideTag) continue;
// Find which markup tags apply to this content segment
var applicableMarkups = markups.Where(m => m.OpenTagEnd <= start && m.CloseTagStart >= end)
.OrderBy(static m => m.Start) // Outermost first (earliest start)
.ThenByDescending(static m => m.End) // Then by latest end
.ToList();
var run = new Run(Text.Substring(start, end - start));
foreach(MarkupTag markup in applicableMarkups)
{
// This is very simple parsing, possibly more complex legal markup would fail
if(markup.Tag.Contains("bold")) run.FontWeight = FontWeight.Bold;
if(markup.Tag.Contains("italic")) run.FontStyle = FontStyle.Italic;
if(markup.Tag.Contains("underline")) run.TextDecorations = Avalonia.Media.TextDecorations.Underline;
if(!_colorMarkupRegex.IsMatch(markup.Tag)) continue;
Match match = _colorMarkupRegex.Match(markup.Tag);
string foreground = match.Groups["fg"].Value;
string? background = match.Groups["bg"].Success ? match.Groups["bg"].Value : null;
// Apply foreground color (inner tags will override outer tags)
if(!string.IsNullOrEmpty(foreground))
{
IBrush? fgBrush = ParseColor(foreground);
if(fgBrush != null) run.Foreground = fgBrush;
}
// Apply background color (inner tags will override outer tags)
if(string.IsNullOrEmpty(background)) continue;
IBrush? bgBrush = ParseColor(background);
if(bgBrush != null) run.Background = bgBrush;
}
inlines.Add(run);
}
Inlines = inlines;
}
static IBrush ParseColor(string color)
{
try
{
string? hexValue;
// Handle hex colors like #ff0000
if(color.StartsWith("#")) return new SolidColorBrush(Color.Parse(color));
// Handle rgb(r,g,b) format
if(!color.StartsWith("rgb(") || !color.EndsWith(")"))
{
return _spectreColorMap.TryGetValue(color, out hexValue)
? new SolidColorBrush(Color.Parse(hexValue))
:
// Fallback: try to parse as Avalonia named color
new SolidColorBrush(Color.Parse(color));
}
string[] values = color.Substring(4, color.Length - 5).Split(',');
if(values.Length == 3 &&
byte.TryParse(values[0].Trim(), out byte r) &&
byte.TryParse(values[1].Trim(), out byte g) &&
byte.TryParse(values[2].Trim(), out byte b))
return new SolidColorBrush(Color.FromRgb(r, g, b));
// Handle Spectre Console named colors using the mapping
return _spectreColorMap.TryGetValue(color, out hexValue)
? new SolidColorBrush(Color.Parse(hexValue))
:
// Fallback: try to parse as Avalonia named color
new SolidColorBrush(Color.Parse(color));
}
catch
{
// If parsing fails, return null
}
return null;
}
List<MarkupTag> ParseMarkups(string text)
{
var result = new List<MarkupTag>();
var tagStack = new Stack<(int start, int openTagEnd, string tag)>();
var i = 0;
while(i < text.Length)
{
if(text[i] == '[')
{
int tagStart = i;
i++;
// Check if it's a closing tag [/]
if(i < text.Length && text[i] == '/')
{
i++;
if(i >= text.Length || text[i] != ']') continue;
// Found [/], close the most recent tag
if(tagStack.Count > 0)
{
(int openStart, int openTagEnd, string tag) = tagStack.Pop();
int closeTagEnd = i + 1; // After the ']' of [/]
result.Add(new MarkupTag(openStart, closeTagEnd, tag, openTagEnd, tagStart));
}
}
else
{
// Parse opening tag like [red], [bold], etc.
int tagNameStart = i;
while(i < text.Length && text[i] != ']' && text[i] != '[') i++;
if(i >= text.Length || text[i] != ']') continue;
string tagName = text.Substring(tagNameStart, i - tagNameStart);
if(!string.IsNullOrWhiteSpace(tagName))
{
int openTagEnd = i + 1; // After the ']'
tagStack.Push((tagStart, openTagEnd, tagName));
}
}
}
i++;
}
return result;
}
[GeneratedRegex(@"^(?<fg>#[0-9a-fA-F]{6}|rgb\(\d{1,3},\d{1,3},\d{1,3}\)|[a-zA-Z0-9_]+)(\s+on\s+(?<bg>#[0-9a-fA-F]{6}|rgb\(\d{1,3},\d{1,3},\d{1,3}\)|[a-zA-Z0-9_]+))?$",
RegexOptions.Compiled)]
private static partial Regex ColorRegex();
#region Nested type: MarkupTag
sealed record MarkupTag(int Start, int End, string Tag, int OpenTagEnd, int CloseTagStart);
#endregion
}
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