| 1 | using System.Globalization; |
| 2 | using Avalonia; |
| 3 | using Avalonia.Media; |
| 4 | using CascadeIDE.Cockpit.Graph.Layout; |
| 5 | |
| 6 | namespace CascadeIDE.Views.SkiaKit.Graph; |
| 7 | |
| 8 | public static partial class SkiaGraphSceneDrawing |
| 9 | { |
| 10 | private static void DrawNodes(DrawingContext context, GraphLayoutScene scene, SkiaGraphVisualTheme theme) |
| 11 | { |
| 12 | var useLegend = scene.UseLegendColumn; |
| 13 | foreach (var n in scene.Nodes) |
| 14 | { |
| 15 | var highlighted = scene.HighlightedNodeIds.Contains(n.Id); |
| 16 | if (n.Shape == GraphNodeShape.Condition) |
| 17 | DrawConditionBranch(context, theme, n, highlighted); |
| 18 | else if (n.Shape == GraphNodeShape.Rectangle) |
| 19 | DrawRectangleNode(context, theme, n, highlighted); |
| 20 | else |
| 21 | { |
| 22 | context.DrawEllipse(ResolveNodeFill(theme, n), theme.NodeStrokePen, n.Center, n.Radius, n.Radius); |
| 23 | if (highlighted) |
| 24 | context.DrawEllipse(null, theme.HighlightedNodePen, n.Center, n.Radius + 3, n.Radius + 3); |
| 25 | } |
| 26 | |
| 27 | if (n.Shape != GraphNodeShape.Rectangle) |
| 28 | { |
| 29 | var glyph = BuildNodeGlyph(n, useLegend, scene.ShowNodeLegendGlyphs); |
| 30 | if (IsExitNode(n)) |
| 31 | { |
| 32 | var arrowLen = Math.Clamp(n.Radius * 0.95, 4.5, 12); |
| 33 | DrawNorthEastExitArrowShaftCentered(context, theme.GlyphBrush, n.Center, arrowLen, 1.15); |
| 34 | } |
| 35 | else if (!string.IsNullOrEmpty(glyph)) |
| 36 | { |
| 37 | var maxGlyph = Math.Max(SkiaGraphRenderInvariants.MinGlyphFontSize, n.Radius * 0.92); |
| 38 | var fontSize = n.LegendIndex is > 99 |
| 39 | ? SkiaGraphRenderInvariants.MinGlyphFontSize |
| 40 | : Math.Clamp(maxGlyph, SkiaGraphRenderInvariants.MinGlyphFontSize, 11); |
| 41 | var glyphText = new FormattedText( |
| 42 | glyph, |
| 43 | CultureInfo.InvariantCulture, |
| 44 | FlowDirection.LeftToRight, |
| 45 | theme.GlyphTypeface, |
| 46 | fontSize, |
| 47 | theme.GlyphBrush); |
| 48 | var glyphOrigin = new Point( |
| 49 | n.Center.X - glyphText.Width / 2, |
| 50 | n.Center.Y - glyphText.Height / 2); |
| 51 | context.DrawText(glyphText, glyphOrigin); |
| 52 | } |
| 53 | |
| 54 | var fullLabel = BuildNodeFullLabel(n, useLegend, scene); |
| 55 | if (!string.IsNullOrWhiteSpace(fullLabel)) |
| 56 | { |
| 57 | var sideFont = scene.SideLabelFontSizePx ?? SkiaGraphRenderInvariants.MinSideLabelFontSize; |
| 58 | var labelText = new FormattedText( |
| 59 | fullLabel, |
| 60 | CultureInfo.InvariantCulture, |
| 61 | FlowDirection.LeftToRight, |
| 62 | theme.SideLabelTypeface, |
| 63 | sideFont, |
| 64 | theme.SideLabelBrush); |
| 65 | var labelOrigin = ResolveSideLabelOrigin(n, labelText, scene); |
| 66 | context.DrawText(labelText, labelOrigin); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /// <summary>Узел условия в control-flow: заливка и обводка ромба (классический знак ветвления).</summary> |
| 73 | private static void DrawConditionBranch(DrawingContext context, SkiaGraphVisualTheme theme, GraphLayoutNode n, bool highlighted) |
| 74 | { |
| 75 | var geo = new StreamGeometry(); |
| 76 | var c = n.Center; |
| 77 | var r = n.Radius; |
| 78 | using (var ig = geo.Open()) |
| 79 | { |
| 80 | ig.BeginFigure(new Point(c.X, c.Y - r), true); |
| 81 | ig.LineTo(new Point(c.X + r, c.Y)); |
| 82 | ig.LineTo(new Point(c.X, c.Y + r)); |
| 83 | ig.LineTo(new Point(c.X - r, c.Y)); |
| 84 | ig.EndFigure(true); |
| 85 | } |
| 86 | |
| 87 | context.DrawGeometry(ResolveNodeFill(theme, n), theme.NodeStrokePen, geo); |
| 88 | if (highlighted) |
| 89 | { |
| 90 | var hr = r + 3; |
| 91 | var hgeo = new StreamGeometry(); |
| 92 | using (var ig = hgeo.Open()) |
| 93 | { |
| 94 | ig.BeginFigure(new Point(c.X, c.Y - hr), true); |
| 95 | ig.LineTo(new Point(c.X + hr, c.Y)); |
| 96 | ig.LineTo(new Point(c.X, c.Y + hr)); |
| 97 | ig.LineTo(new Point(c.X - hr, c.Y)); |
| 98 | ig.EndFigure(true); |
| 99 | } |
| 100 | |
| 101 | context.DrawGeometry(null, theme.HighlightedNodePen, hgeo); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | private static IBrush ResolveNodeFill(SkiaGraphVisualTheme theme, GraphLayoutNode node) |
| 106 | { |
| 107 | if (node.IsAnchor) |
| 108 | return theme.AnchorFill; |
| 109 | if (IsConditionNode(node)) |
| 110 | return theme.ConditionFill; |
| 111 | if (IsExitNode(node)) |
| 112 | return theme.ExitFill; |
| 113 | if (IsHandlerNode(node)) |
| 114 | return theme.HandlerFill; |
| 115 | return theme.CallFill; |
| 116 | } |
| 117 | |
| 118 | private static void DrawRectangleNode(DrawingContext context, SkiaGraphVisualTheme theme, GraphLayoutNode n, bool highlighted) |
| 119 | { |
| 120 | const double padX = 10; |
| 121 | const double padY = 6; |
| 122 | var baseSize = ResolveRectangleNodeSize(n.Radius); |
| 123 | var fontSize = Math.Clamp(baseSize.Height * 0.52, 9, 14); |
| 124 | // Prefer "card grows to fit text" (instead of forcing ellipsis early). Keep a sane upper bound to avoid absurd cards. |
| 125 | var maxCardW = 560.0; |
| 126 | var maxCardH = 150.0; |
| 127 | var maxTextW = Math.Max(36, maxCardW - padX * 2); |
| 128 | |
| 129 | var raw = (n.Label ?? "").Trim(); |
| 130 | if (raw.Length == 0) |
| 131 | raw = Path.GetFileName(n.FullPath); |
| 132 | |
| 133 | // Try single-line first, then fallback to 2-line split. |
| 134 | var single = new FormattedText( |
| 135 | raw, |
| 136 | CultureInfo.InvariantCulture, |
| 137 | FlowDirection.LeftToRight, |
| 138 | theme.SideLabelTypeface, |
| 139 | fontSize, |
| 140 | theme.SideLabelBrush); |
| 141 | |
| 142 | string l1; |
| 143 | string? l2; |
| 144 | if (single.Width <= maxTextW) |
| 145 | { |
| 146 | l1 = raw; |
| 147 | l2 = null; |
| 148 | } |
| 149 | else |
| 150 | { |
| 151 | (l1, l2) = SplitLabelIntoTwoLines(raw); |
| 152 | } |
| 153 | |
| 154 | var t1 = new FormattedText( |
| 155 | l1, |
| 156 | CultureInfo.InvariantCulture, |
| 157 | FlowDirection.LeftToRight, |
| 158 | theme.SideLabelTypeface, |
| 159 | fontSize, |
| 160 | theme.SideLabelBrush); |
| 161 | FormattedText? t2 = null; |
| 162 | if (!string.IsNullOrEmpty(l2)) |
| 163 | { |
| 164 | t2 = new FormattedText( |
| 165 | l2, |
| 166 | CultureInfo.InvariantCulture, |
| 167 | FlowDirection.LeftToRight, |
| 168 | theme.SideLabelTypeface, |
| 169 | fontSize, |
| 170 | theme.SideLabelBrush); |
| 171 | } |
| 172 | |
| 173 | // If still too wide, ellipsize the widest line using a conservative char budget. |
| 174 | if (t1.Width > maxTextW || (t2 is not null && t2.Width > maxTextW)) |
| 175 | { |
| 176 | var approxCharW = Math.Max(5.5, t1.Width / Math.Max(1, l1.Length)); |
| 177 | var budget = Math.Max(10, (int)Math.Floor(maxTextW / approxCharW)); |
| 178 | l1 = Ellipsize(l1, budget); |
| 179 | if (!string.IsNullOrEmpty(l2)) |
| 180 | l2 = Ellipsize(l2, budget); |
| 181 | t1 = new FormattedText( |
| 182 | l1, |
| 183 | CultureInfo.InvariantCulture, |
| 184 | FlowDirection.LeftToRight, |
| 185 | theme.SideLabelTypeface, |
| 186 | fontSize, |
| 187 | theme.SideLabelBrush); |
| 188 | t2 = string.IsNullOrEmpty(l2) |
| 189 | ? null |
| 190 | : new FormattedText( |
| 191 | l2, |
| 192 | CultureInfo.InvariantCulture, |
| 193 | FlowDirection.LeftToRight, |
| 194 | theme.SideLabelTypeface, |
| 195 | fontSize, |
| 196 | theme.SideLabelBrush); |
| 197 | } |
| 198 | |
| 199 | // Ensure the card really contains the label (with padding), otherwise it looks like “text without a box”. |
| 200 | var textW = Math.Max(t1.Width, t2?.Width ?? 0); |
| 201 | var textH = t1.Height + (t2 is null ? 0 : t2.Height + 2); |
| 202 | var w = Math.Clamp(Math.Max(baseSize.Width, textW + padX * 2), 42, maxCardW); |
| 203 | var h = Math.Clamp(Math.Max(baseSize.Height, textH + padY * 2), 18, maxCardH); |
| 204 | var rect = new Rect(n.Center.X - w / 2, n.Center.Y - h / 2, w, h); |
| 205 | const double corner = 6; |
| 206 | context.DrawRectangle(ResolveNodeFill(theme, n), theme.NodeStrokePen, rect, corner, corner); |
| 207 | if (highlighted) |
| 208 | { |
| 209 | var hRect = rect.Inflate(3); |
| 210 | context.DrawRectangle(null, theme.HighlightedNodePen, hRect, corner, corner); |
| 211 | } |
| 212 | |
| 213 | // Label inside card (up to 2 lines). |
| 214 | if (t2 is null) |
| 215 | { |
| 216 | context.DrawText(t1, new Point(n.Center.X - t1.Width / 2, n.Center.Y - t1.Height / 2)); |
| 217 | return; |
| 218 | } |
| 219 | |
| 220 | var totalH = t1.Height + 2 + t2.Height; |
| 221 | var top = n.Center.Y - totalH / 2; |
| 222 | context.DrawText(t1, new Point(n.Center.X - t1.Width / 2, top)); |
| 223 | context.DrawText(t2, new Point(n.Center.X - t2.Width / 2, top + t1.Height + 2)); |
| 224 | } |
| 225 | |
| 226 | private static (double Width, double Height) ResolveRectangleNodeSize(double radius) |
| 227 | { |
| 228 | // Keep size derived only from radius so hit-testing can match without text measurement. |
| 229 | var w = Math.Clamp(radius * 4.6, 56, 200); |
| 230 | var h = Math.Clamp(radius * 2.6, 24, 60); |
| 231 | return (w, h); |
| 232 | } |
| 233 | |
| 234 | private static (string Line1, string? Line2) SplitLabelIntoTwoLines(string raw) |
| 235 | { |
| 236 | // Tokenize by separators and PascalCase boundaries. |
| 237 | var tokens = SplitLabelTokens(raw); |
| 238 | if (tokens.Count == 0) |
| 239 | return (Ellipsize(raw, 24), null); |
| 240 | |
| 241 | // Prefer: 2 lines with roughly balanced length. |
| 242 | var target = Math.Max(8, tokens.Sum(t => t.Length) / 2); |
| 243 | var line1 = new List<string>(); |
| 244 | var len1 = 0; |
| 245 | foreach (var t in tokens) |
| 246 | { |
| 247 | var add = (line1.Count == 0 ? 0 : 1) + t.Length; |
| 248 | if (line1.Count > 0 && len1 + add > target) |
| 249 | break; |
| 250 | line1.Add(t); |
| 251 | len1 += add; |
| 252 | } |
| 253 | |
| 254 | if (line1.Count == 0) |
| 255 | line1.Add(tokens[0]); |
| 256 | |
| 257 | var rest = tokens.Skip(line1.Count).ToList(); |
| 258 | var l1 = string.Join(' ', line1); |
| 259 | if (rest.Count == 0) |
| 260 | return (l1, null); |
| 261 | |
| 262 | var l2 = string.Join(' ', rest); |
| 263 | return (l1, l2); |
| 264 | } |
| 265 | |
| 266 | private static List<string> SplitLabelTokens(string raw) |
| 267 | { |
| 268 | var cleaned = raw.Replace('_', ' ').Replace('.', ' ').Replace('-', ' ').Trim(); |
| 269 | if (cleaned.Length == 0) |
| 270 | return []; |
| 271 | |
| 272 | var list = new List<string>(); |
| 273 | foreach (var part in cleaned.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)) |
| 274 | { |
| 275 | // Split PascalCase: ArchitectureForbiddenApiSyntax -> Architecture Forbidden Api Syntax |
| 276 | var start = 0; |
| 277 | for (var i = 1; i < part.Length; i++) |
| 278 | { |
| 279 | if (char.IsUpper(part[i]) && char.IsLower(part[i - 1])) |
| 280 | { |
| 281 | if (i - start >= 2) |
| 282 | list.Add(part[start..i]); |
| 283 | start = i; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | if (start < part.Length) |
| 288 | list.Add(part[start..]); |
| 289 | } |
| 290 | |
| 291 | return list; |
| 292 | } |
| 293 | |
| 294 | private static string Ellipsize(string s, int maxChars) |
| 295 | { |
| 296 | var t = (s ?? "").Trim(); |
| 297 | if (t.Length <= maxChars) |
| 298 | return t; |
| 299 | if (maxChars <= 1) |
| 300 | return "…"; |
| 301 | return t[..(maxChars - 1)] + "…"; |
| 302 | } |
| 303 | |
| 304 | private static string BuildNodeGlyph(GraphLayoutNode node, bool useLegendColumn, bool showNodeLegendGlyphs) |
| 305 | { |
| 306 | if (node.IsAnchor) |
| 307 | return "A"; |
| 308 | if (string.Equals(node.Kind, "protected_step", StringComparison.OrdinalIgnoreCase)) |
| 309 | return "T"; |
| 310 | if (IsExitNode(node)) |
| 311 | return ""; |
| 312 | if (node.LegendIndex is { } idx && (useLegendColumn || showNodeLegendGlyphs)) |
| 313 | return idx.ToString(CultureInfo.InvariantCulture); |
| 314 | if (IsConditionNode(node)) |
| 315 | return "?"; |
| 316 | if (IsHandlerNode(node)) |
| 317 | return "!"; |
| 318 | return "•"; |
| 319 | } |
| 320 | |
| 321 | /// <summary>Подпись спутника: иерархия (related-files); CFG вертикаль — справа, CFG горизонт — под узлом (не в поток).</summary> |
| 322 | private static Point ResolveSideLabelOrigin( |
| 323 | GraphLayoutNode node, |
| 324 | FormattedText labelText, |
| 325 | GraphLayoutScene scene) |
| 326 | { |
| 327 | const double gap = 6; |
| 328 | |
| 329 | if (scene.Presentation == GraphLayoutPresentation.CodeControlFlow |
| 330 | && scene.ControlFlowMainAxis == GraphControlFlowMainAxis.Horizontal |
| 331 | && !node.IsAnchor) |
| 332 | { |
| 333 | return new Point( |
| 334 | node.Center.X - labelText.Width / 2, |
| 335 | node.Center.Y + node.Radius + gap); |
| 336 | } |
| 337 | |
| 338 | var anchorCenter = |
| 339 | scene.Presentation == GraphLayoutPresentation.WorkspaceRelatedFiles |
| 340 | ? scene.Nodes.FirstOrDefault(static n => n.IsAnchor)?.Center |
| 341 | : null; |
| 342 | var layout = CascadeIDE.Models.CodeNavigationMapRelatedGraphLayoutKind.Normalize(scene.RelatedFilesLayout); |
| 343 | if (layout == CascadeIDE.Models.CodeNavigationMapRelatedGraphLayoutKind.TopDown && !node.IsAnchor) |
| 344 | { |
| 345 | return new Point( |
| 346 | node.Center.X - labelText.Width / 2, |
| 347 | node.Center.Y + node.Radius + gap); |
| 348 | } |
| 349 | |
| 350 | if (layout == CascadeIDE.Models.CodeNavigationMapRelatedGraphLayoutKind.BottomUp && !node.IsAnchor) |
| 351 | { |
| 352 | return new Point( |
| 353 | node.Center.X - labelText.Width / 2, |
| 354 | node.Center.Y - node.Radius - gap - labelText.Height); |
| 355 | } |
| 356 | |
| 357 | if (anchorCenter is { } anchor && !node.IsAnchor |
| 358 | && layout == CascadeIDE.Models.CodeNavigationMapRelatedGraphLayoutKind.Radial) |
| 359 | { |
| 360 | var dx = node.Center.X - anchor.X; |
| 361 | var dy = node.Center.Y - anchor.Y; |
| 362 | var dist = Math.Sqrt(dx * dx + dy * dy); |
| 363 | if (dist > 4) |
| 364 | { |
| 365 | var ux = dx / dist; |
| 366 | var uy = dy / dist; |
| 367 | var edge = new Point( |
| 368 | node.Center.X + ux * (node.Radius + gap), |
| 369 | node.Center.Y + uy * (node.Radius + gap)); |
| 370 | return ux >= 0 |
| 371 | ? new Point(edge.X, edge.Y - labelText.Height / 2) |
| 372 | : new Point(edge.X - labelText.Width, edge.Y - labelText.Height / 2); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | return new Point( |
| 377 | node.Center.X + node.Radius + gap, |
| 378 | node.Center.Y - labelText.Height / 2); |
| 379 | } |
| 380 | |
| 381 | private static string? BuildNodeFullLabel(GraphLayoutNode node, bool useLegendColumn, GraphLayoutScene scene) |
| 382 | { |
| 383 | if (useLegendColumn) |
| 384 | return null; |
| 385 | if (node.IsAnchor || IsConditionNode(node) || IsExitNode(node)) |
| 386 | return null; |
| 387 | if (scene.Presentation == GraphLayoutPresentation.WorkspaceRelatedFiles |
| 388 | && !CascadeIDE.Models.CodeNavigationMapRelatedGraphLayoutKind.IsHierarchy(scene.RelatedFilesLayout)) |
| 389 | { |
| 390 | var satellites = scene.Nodes.Count(n => !n.IsAnchor); |
| 391 | if (satellites > 8) |
| 392 | return null; |
| 393 | } |
| 394 | |
| 395 | if (scene.ShowNodeLegendGlyphs && node.LegendIndex is > 0) |
| 396 | return null; |
| 397 | |
| 398 | var label = node.Label?.Trim(); |
| 399 | if (string.IsNullOrWhiteSpace(label)) |
| 400 | return null; |
| 401 | return label; |
| 402 | } |
| 403 | |
| 404 | private static bool IsExitNode(GraphLayoutNode node) => |
| 405 | string.Equals(node.Kind, ExitStepKind, StringComparison.OrdinalIgnoreCase); |
| 406 | |
| 407 | private static bool IsConditionNode(GraphLayoutNode node) => |
| 408 | string.Equals(node.Kind, ConditionStepKind, StringComparison.OrdinalIgnoreCase); |
| 409 | |
| 410 | private static bool IsHandlerNode(GraphLayoutNode node) => |
| 411 | string.Equals(node.Kind, "handler_step", StringComparison.OrdinalIgnoreCase); |
| 412 | } |
| 413 | |