| 1 | #nullable enable |
| 2 | |
| 3 | namespace CascadeIDE.Views.Chat.Skia; |
| 4 | |
| 5 | internal enum SkiaMarkdownBlockKind |
| 6 | { |
| 7 | Paragraph = 0, |
| 8 | Heading1 = 1, |
| 9 | Heading2 = 2, |
| 10 | Heading3 = 3, |
| 11 | Bullet = 4, |
| 12 | HorizontalRule = 5, |
| 13 | Blank = 6, |
| 14 | } |
| 15 | |
| 16 | /// <summary>Одна визуальная строка документа (после wrap) с блочным контекстом.</summary> |
| 17 | internal readonly record struct SkiaMarkdownRow(SkiaMarkdownBlockKind Kind, IReadOnlyList<SkiaMarkdownRun> Runs); |
| 18 | |
| 19 | /// <summary>Блочный Markdown subset для длинных локальных текстов (справка /help): заголовки, списки, HR, inline v1.</summary> |
| 20 | internal static class SkiaMarkdownDocument |
| 21 | { |
| 22 | public static IReadOnlyList<SkiaMarkdownRow> Layout(string text, int maxChars) |
| 23 | { |
| 24 | maxChars = Math.Max(8, maxChars); |
| 25 | if (string.IsNullOrEmpty(text)) |
| 26 | return []; |
| 27 | |
| 28 | var rows = new List<SkiaMarkdownRow>(); |
| 29 | foreach (var rawLine in text.Replace("\r\n", "\n", StringComparison.Ordinal).Split('\n')) |
| 30 | { |
| 31 | var line = rawLine.TrimEnd(); |
| 32 | if (line.Length == 0) |
| 33 | { |
| 34 | rows.Add(new SkiaMarkdownRow(SkiaMarkdownBlockKind.Blank, [])); |
| 35 | continue; |
| 36 | } |
| 37 | |
| 38 | if (IsHorizontalRule(line)) |
| 39 | { |
| 40 | rows.Add(new SkiaMarkdownRow(SkiaMarkdownBlockKind.HorizontalRule, [])); |
| 41 | continue; |
| 42 | } |
| 43 | |
| 44 | if (line.StartsWith("### ", StringComparison.Ordinal)) |
| 45 | { |
| 46 | AppendWrapped(rows, line[4..], maxChars, SkiaMarkdownBlockKind.Heading3); |
| 47 | continue; |
| 48 | } |
| 49 | |
| 50 | if (line.StartsWith("## ", StringComparison.Ordinal)) |
| 51 | { |
| 52 | AppendWrapped(rows, line[3..], maxChars, SkiaMarkdownBlockKind.Heading2); |
| 53 | continue; |
| 54 | } |
| 55 | |
| 56 | if (line.StartsWith("# ", StringComparison.Ordinal)) |
| 57 | { |
| 58 | AppendWrapped(rows, line[2..], maxChars, SkiaMarkdownBlockKind.Heading1); |
| 59 | continue; |
| 60 | } |
| 61 | |
| 62 | if (line.StartsWith("- ", StringComparison.Ordinal) || line.StartsWith("* ", StringComparison.Ordinal)) |
| 63 | { |
| 64 | AppendBulletWrapped(rows, line[2..], maxChars); |
| 65 | continue; |
| 66 | } |
| 67 | |
| 68 | AppendWrapped(rows, line, maxChars, SkiaMarkdownBlockKind.Paragraph); |
| 69 | } |
| 70 | |
| 71 | return rows; |
| 72 | } |
| 73 | |
| 74 | private static void AppendWrapped( |
| 75 | List<SkiaMarkdownRow> rows, |
| 76 | string content, |
| 77 | int maxChars, |
| 78 | SkiaMarkdownBlockKind kind) |
| 79 | { |
| 80 | var wrapped = SkiaMarkdownLayout.WrapLines(SkiaMarkdownLayout.ParseInline(content), maxChars); |
| 81 | foreach (var line in wrapped) |
| 82 | rows.Add(new SkiaMarkdownRow(kind, line.Runs)); |
| 83 | } |
| 84 | |
| 85 | private static void AppendBulletWrapped(List<SkiaMarkdownRow> rows, string content, int maxChars) |
| 86 | { |
| 87 | var bulletMax = Math.Max(8, maxChars - 2); |
| 88 | var wrapped = SkiaMarkdownLayout.WrapLines(SkiaMarkdownLayout.ParseInline(content), bulletMax); |
| 89 | for (var i = 0; i < wrapped.Count; i++) |
| 90 | { |
| 91 | var lineRuns = new List<SkiaMarkdownRun> { new(i == 0 ? "• " : " ", SkiaMarkdownStyle.Plain) }; |
| 92 | lineRuns.AddRange(wrapped[i].Runs); |
| 93 | rows.Add(new SkiaMarkdownRow(SkiaMarkdownBlockKind.Bullet, lineRuns)); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | private static bool IsHorizontalRule(string line) |
| 98 | { |
| 99 | var t = line.Trim(); |
| 100 | if (t.Length < 3) |
| 101 | return false; |
| 102 | return t.All(c => c is '-' or '*' or ' ' or '_') |
| 103 | && t.Any(c => c is '-' or '*'); |
| 104 | } |
| 105 | } |
| 106 | |