| 1 | #nullable enable |
| 2 | using Avalonia; |
| 3 | using CascadeIDE.Cockpit.Graph; |
| 4 | using CascadeIDE.Models; |
| 5 | |
| 6 | namespace CascadeIDE.Cockpit.Graph.Layout; |
| 7 | |
| 8 | /// <summary> |
| 9 | /// Укладка control-flow: главный поток по оси (адаптивно горизонт/вертикаль), |
| 10 | /// побочная ось — параллели уровня из BFS от якоря. |
| 11 | /// </summary> |
| 12 | public sealed class ControlFlowGraphLayoutEngine : IGraphLayoutEngine |
| 13 | { |
| 14 | public GraphLayoutScene Layout( |
| 15 | GraphDocument doc, |
| 16 | double width, |
| 17 | double height, |
| 18 | CodeNavigationMapDetailLevel detailLevel = CodeNavigationMapDetailLevel.Normal, |
| 19 | GraphControlFlowMainAxis? controlFlowMainAxisOverride = null, |
| 20 | GraphLayoutEngineOptions layoutOptions = default) |
| 21 | { |
| 22 | if (width <= 0 || height <= 0) |
| 23 | return new GraphLayoutScene |
| 24 | { |
| 25 | Nodes = [], |
| 26 | Edges = [], |
| 27 | Legend = [], |
| 28 | LegendColumnLeft = width, |
| 29 | LegendPlacement = GraphLegendBlockPlacement.BesideGraph, |
| 30 | LegendBlockTopY = 0 |
| 31 | }; |
| 32 | |
| 33 | var anchor = doc.Nodes.FirstOrDefault(n => string.Equals(n.Kind, "anchor", StringComparison.OrdinalIgnoreCase)) |
| 34 | ?? doc.Nodes.FirstOrDefault(n => n.Id.Equals("n0", StringComparison.OrdinalIgnoreCase)) |
| 35 | ?? (doc.Nodes.Count > 0 ? doc.Nodes[0] : null); |
| 36 | if (anchor is null) |
| 37 | return new GraphLayoutScene |
| 38 | { |
| 39 | Nodes = [], |
| 40 | Edges = [], |
| 41 | Legend = [], |
| 42 | LegendColumnLeft = width, |
| 43 | LegendPlacement = GraphLegendBlockPlacement.BesideGraph, |
| 44 | LegendBlockTopY = 0 |
| 45 | }; |
| 46 | |
| 47 | var nodeById = doc.Nodes.ToDictionary(n => n.Id, StringComparer.OrdinalIgnoreCase); |
| 48 | var outgoing = BuildOutgoing(doc.Edges); |
| 49 | var depthById = BuildDepthMap(anchor.Id, outgoing); |
| 50 | |
| 51 | // Узлы, недостижимые от anchor, ставим в хвост (последние уровни), чтобы не терялись. |
| 52 | var maxDepth = depthById.Count == 0 ? 0 : depthById.Values.Max(); |
| 53 | foreach (var n in doc.Nodes) |
| 54 | { |
| 55 | if (depthById.ContainsKey(n.Id)) |
| 56 | continue; |
| 57 | maxDepth++; |
| 58 | depthById[n.Id] = maxDepth; |
| 59 | } |
| 60 | |
| 61 | var levels = depthById |
| 62 | .GroupBy(kv => kv.Value) |
| 63 | .OrderBy(g => g.Key) |
| 64 | .ToDictionary(g => g.Key, g => g.Select(kv => kv.Key).ToList()); |
| 65 | |
| 66 | var topPadding = GraphControlFlowLayoutMetrics.TopPadding; |
| 67 | var bottomPadding = GraphControlFlowLayoutMetrics.BottomPadding; |
| 68 | var sidePadding = GraphControlFlowLayoutMetrics.SidePadding; |
| 69 | var legendGap = GraphControlFlowLayoutMetrics.LegendGap; |
| 70 | |
| 71 | static bool IsExitStep(GraphNode n) => |
| 72 | string.Equals(n.Kind, "exit_step", StringComparison.OrdinalIgnoreCase); |
| 73 | |
| 74 | static bool IsConditionStep(GraphNode n) => |
| 75 | string.Equals(n.Kind, "condition_step", StringComparison.OrdinalIgnoreCase); |
| 76 | |
| 77 | var compactLegend = detailLevel == CodeNavigationMapDetailLevel.Glance; |
| 78 | var hasLegendRows = detailLevel == CodeNavigationMapDetailLevel.Inspect && doc.Nodes.Any(static n => |
| 79 | !IsExitStep(n) |
| 80 | && n.LegendIndex is > 0 |
| 81 | && !string.IsNullOrWhiteSpace(n.LegendText)); |
| 82 | var showNodeLegendGlyphs = doc.Nodes.Any(static n => |
| 83 | !IsExitStep(n) && n.LegendIndex is > 0); |
| 84 | var showLegendConditionKey = !compactLegend && doc.Nodes.Any(IsConditionStep); |
| 85 | var showLegendReturnKey = !compactLegend && doc.Nodes.Any(IsExitStep); |
| 86 | var showLegendExceptionFlowKey = !compactLegend && doc.Nodes.Any(static n => |
| 87 | string.Equals(n.Kind, "handler_step", StringComparison.OrdinalIgnoreCase)); |
| 88 | ComputeEdgeStyleLegend( |
| 89 | doc.Edges, |
| 90 | out var edgeStyleLegendKey, |
| 91 | out var edgeStyleLegendRowCount); |
| 92 | var showLegendEdgeStyleKey = !compactLegend && edgeStyleLegendKey; |
| 93 | var useLegendColumn = hasLegendRows || showLegendConditionKey || showLegendReturnKey |
| 94 | || showLegendExceptionFlowKey || showLegendEdgeStyleKey; |
| 95 | var legendRowsPreview = hasLegendRows |
| 96 | ? doc.Nodes |
| 97 | .Where(n => |
| 98 | !IsExitStep(n) |
| 99 | && n.LegendIndex is > 0 |
| 100 | && !string.IsNullOrWhiteSpace(n.LegendText)) |
| 101 | .OrderBy(n => n.LegendIndex.GetValueOrDefault()) |
| 102 | .Select(n => new GraphLegendEntry { Index = n.LegendIndex!.Value, Text = n.LegendText!.Trim() }) |
| 103 | .ToList() |
| 104 | : new List<GraphLegendEntry>(); |
| 105 | |
| 106 | var contentLegendNeed = EstimateLegendColumnContentWidth( |
| 107 | legendRowsPreview, |
| 108 | showLegendReturnKey, |
| 109 | showLegendConditionKey, |
| 110 | showLegendExceptionFlowKey, |
| 111 | showLegendEdgeStyleKey); |
| 112 | var fallbackFraction = width * GraphControlFlowLayoutMetrics.LegendReserveWidthFraction; |
| 113 | var legendReserveCap = GraphControlFlowLayoutMetrics.ResolveLegendReserveCap(width); |
| 114 | var legendReserveLo = Math.Min(GraphControlFlowLayoutMetrics.LegendReserveMin, legendReserveCap); |
| 115 | var firstLegendReserve = useLegendColumn |
| 116 | ? Math.Clamp( |
| 117 | Math.Max(fallbackFraction, contentLegendNeed), |
| 118 | legendReserveLo, |
| 119 | legendReserveCap) |
| 120 | : 0; |
| 121 | IReadOnlyList<GraphLegendEntry> legendRows = legendRowsPreview; |
| 122 | |
| 123 | GraphLayoutScene BuildFor(double heightForY, double legendResForWidth) |
| 124 | { |
| 125 | var graphWidth = Math.Max( |
| 126 | GraphControlFlowLayoutMetrics.MinGraphWidth, |
| 127 | width - legendResForWidth - (useLegendColumn ? legendGap : 0)); |
| 128 | |
| 129 | var levelKeys = Math.Max(1, levels.Count); |
| 130 | var maxBreadth = levels.Count == 0 ? 1 : levels.Values.Max(static ids => ids.Count); |
| 131 | var mainAxis = controlFlowMainAxisOverride |
| 132 | ?? GraphControlFlowLayoutMetrics.ChooseMainAxis(graphWidth, heightForY, levelKeys, maxBreadth); |
| 133 | var horizontal = mainAxis == GraphControlFlowMainAxis.Horizontal; |
| 134 | |
| 135 | var innerH = heightForY - topPadding - bottomPadding; |
| 136 | var innerMain = horizontal ? graphWidth - 2 * sidePadding : innerH; |
| 137 | var bandCrossSize = horizontal |
| 138 | ? GraphControlFlowLayoutMetrics.ResolveReadableBandWidth(innerH) |
| 139 | : GraphControlFlowLayoutMetrics.ResolveReadableBandWidth(graphWidth); |
| 140 | var bandCrossStart = horizontal |
| 141 | ? topPadding + (innerH - bandCrossSize) * 0.5 |
| 142 | : (graphWidth - bandCrossSize) * 0.5; |
| 143 | var centerCross = bandCrossStart + bandCrossSize * 0.5; |
| 144 | var labelCharBudget = GraphControlFlowLayoutMetrics.ResolveLabelCharBudget(bandCrossSize); |
| 145 | if (layoutOptions.IsDense) |
| 146 | labelCharBudget = Math.Max(GraphControlFlowLayoutMetrics.LabelCharBudgetMin, labelCharBudget - 4); |
| 147 | |
| 148 | var slotCount = Math.Max(1, levelKeys - 1); |
| 149 | var rawMainStep = innerMain / slotCount; |
| 150 | var minMainStep = GraphControlFlowLayoutMetrics.MinVerticalStepForLevelCount(levelKeys); |
| 151 | var maxMainStep = Math.Min( |
| 152 | GraphControlFlowLayoutMetrics.MaxReadableVerticalStepCap, |
| 153 | Math.Max(GraphControlFlowLayoutMetrics.MaxReadableVerticalStep, rawMainStep)); |
| 154 | var mainStep = Math.Clamp(rawMainStep, minMainStep, maxMainStep); |
| 155 | var mainSpan = Math.Max(0, levelKeys - 1) * mainStep; |
| 156 | var mainStart = horizontal |
| 157 | ? sidePadding + ((graphWidth - 2 * sidePadding) - mainSpan) * 0.5 |
| 158 | : topPadding + (innerH - mainSpan) * 0.5; |
| 159 | |
| 160 | var radiusMul = Math.Clamp( |
| 161 | mainStep / GraphControlFlowLayoutMetrics.RefVerticalStep, |
| 162 | GraphControlFlowLayoutMetrics.RadiusScaleMin, |
| 163 | GraphControlFlowLayoutMetrics.RadiusScaleMax); |
| 164 | var horizontalRadiusScale = Math.Clamp( |
| 165 | bandCrossSize / GraphControlFlowLayoutMetrics.MaxReadableBandWidth, |
| 166 | GraphControlFlowLayoutMetrics.HorizontalRadiusScaleMin, |
| 167 | 1.0); |
| 168 | radiusMul *= horizontalRadiusScale; |
| 169 | if (layoutOptions.IsDense) |
| 170 | radiusMul *= 0.92; |
| 171 | var sideLabelFontPx = GraphControlFlowLayoutMetrics.ResolveSideLabelFontSize(bandCrossSize, mainStep); |
| 172 | var anchorR = GraphControlFlowLayoutMetrics.AnchorRadiusBase * radiusMul; |
| 173 | var nodeR = GraphControlFlowLayoutMetrics.NodeRadiusBase * radiusMul; |
| 174 | |
| 175 | var minCross = bandCrossStart + sidePadding + nodeR; |
| 176 | var maxCross = Math.Max(minCross, bandCrossStart + bandCrossSize - sidePadding - nodeR); |
| 177 | |
| 178 | var idToCenter = new Dictionary<string, Point>(StringComparer.OrdinalIgnoreCase); |
| 179 | var idToRadius = new Dictionary<string, double>(StringComparer.OrdinalIgnoreCase); |
| 180 | var nodeLayouts = new List<GraphLayoutNode>(doc.Nodes.Count); |
| 181 | |
| 182 | foreach (var (depth, ids) in levels) |
| 183 | { |
| 184 | var orderedIds = ids |
| 185 | .OrderBy(id => string.Equals(id, anchor.Id, StringComparison.OrdinalIgnoreCase) ? 0 : 1) |
| 186 | .ThenBy(id => id, StringComparer.OrdinalIgnoreCase) |
| 187 | .ToList(); |
| 188 | |
| 189 | var count = orderedIds.Count; |
| 190 | var mainPos = mainStart + depth * mainStep; |
| 191 | |
| 192 | for (var i = 0; i < count; i++) |
| 193 | { |
| 194 | var id = orderedIds[i]; |
| 195 | if (!nodeById.TryGetValue(id, out var n)) |
| 196 | continue; |
| 197 | |
| 198 | var crossPos = count == 1 |
| 199 | ? centerCross |
| 200 | : minCross + (maxCross - minCross) * i / (count - 1); |
| 201 | var radius = string.Equals(id, anchor.Id, StringComparison.OrdinalIgnoreCase) ? anchorR : nodeR; |
| 202 | var pt = horizontal |
| 203 | ? new Point(mainPos, crossPos) |
| 204 | : new Point(crossPos, mainPos); |
| 205 | idToCenter[id] = pt; |
| 206 | idToRadius[id] = radius; |
| 207 | var isAnchor = string.Equals(n.Id, anchor.Id, StringComparison.OrdinalIgnoreCase); |
| 208 | var shape = !isAnchor && string.Equals(n.Kind, "condition_step", StringComparison.OrdinalIgnoreCase) |
| 209 | ? GraphNodeShape.Condition |
| 210 | : GraphNodeShape.Circle; |
| 211 | nodeLayouts.Add(new GraphLayoutNode |
| 212 | { |
| 213 | Id = n.Id, |
| 214 | Kind = n.Kind, |
| 215 | FullPath = n.Path, |
| 216 | Label = TruncateLabel(n.Label, labelCharBudget), |
| 217 | Center = pt, |
| 218 | Radius = radius, |
| 219 | IsAnchor = isAnchor, |
| 220 | Shape = shape, |
| 221 | LegendIndex = n.LegendIndex, |
| 222 | LegendLine = n.LegendText, |
| 223 | LineStart = n.LineStart, |
| 224 | LineEnd = n.LineEnd, |
| 225 | LoopGroupId = n.LoopGroupId |
| 226 | }); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | var edgeLayouts = new List<GraphLayoutEdge>(doc.Edges.Count); |
| 231 | foreach (var e in doc.Edges) |
| 232 | { |
| 233 | if (!idToCenter.TryGetValue(e.FromId, out var from)) |
| 234 | continue; |
| 235 | if (!idToCenter.TryGetValue(e.ToId, out var to)) |
| 236 | continue; |
| 237 | |
| 238 | edgeLayouts.Add(new GraphLayoutEdge |
| 239 | { |
| 240 | FromNodeId = e.FromId, |
| 241 | ToNodeId = e.ToId, |
| 242 | From = from, |
| 243 | To = to, |
| 244 | ToRadius = idToRadius.TryGetValue(e.ToId, out var toR) ? toR : nodeR, |
| 245 | Kind = e.Kind, |
| 246 | RelationKind = e.RelationKind, |
| 247 | EdgeProvenance = e.EdgeProvenance |
| 248 | }); |
| 249 | } |
| 250 | |
| 251 | // Колонка легенды: сразу справа от фактического «чернильного» правого края узлов, а не от правой границы полосы. |
| 252 | var legendColumnLeft = width; |
| 253 | if (useLegendColumn) |
| 254 | { |
| 255 | if (nodeLayouts.Count > 0) |
| 256 | { |
| 257 | var inkSlack = GraphControlFlowLayoutMetrics.BesideLegendInkSlack; |
| 258 | var minClear = Math.Max(legendGap, GraphControlFlowLayoutMetrics.LegendBesideMinClearance); |
| 259 | var maxInkRight = 0.0; |
| 260 | foreach (var n in nodeLayouts) |
| 261 | maxInkRight = Math.Max(maxInkRight, n.Center.X + n.Radius + inkSlack); |
| 262 | legendColumnLeft = maxInkRight + minClear; |
| 263 | } |
| 264 | else |
| 265 | { |
| 266 | var minClear = Math.Max(legendGap, GraphControlFlowLayoutMetrics.LegendBesideMinClearance); |
| 267 | legendColumnLeft = horizontal |
| 268 | ? graphWidth - sidePadding * 2 + minClear |
| 269 | : bandCrossStart + bandCrossSize + minClear; |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | return new GraphLayoutScene |
| 274 | { |
| 275 | Nodes = nodeLayouts, |
| 276 | Edges = edgeLayouts, |
| 277 | Legend = legendRows, |
| 278 | UseLegendColumn = useLegendColumn, |
| 279 | ShowLegendConditionKey = showLegendConditionKey, |
| 280 | ShowLegendReturnKey = showLegendReturnKey, |
| 281 | ShowLegendExceptionFlowKey = showLegendExceptionFlowKey, |
| 282 | ShowLegendEdgeStyleKey = showLegendEdgeStyleKey, |
| 283 | LegendColumnLeft = legendColumnLeft, |
| 284 | LegendPlacement = GraphLegendBlockPlacement.BesideGraph, |
| 285 | LegendBlockTopY = 0, |
| 286 | SideLabelFontSizePx = sideLabelFontPx, |
| 287 | ShowNodeLegendGlyphs = showNodeLegendGlyphs, |
| 288 | ControlFlowMainAxis = mainAxis |
| 289 | }; |
| 290 | } |
| 291 | |
| 292 | var sceneBeside = BuildFor(height, firstLegendReserve); |
| 293 | if (!useLegendColumn) |
| 294 | return sceneBeside; |
| 295 | |
| 296 | var textRoomBeside = width - sceneBeside.LegendColumnLeft - 4; |
| 297 | // Колонка у правого края вьюпорта — соседняя невозможна без наложения на граф/обрезки. |
| 298 | var besideUnusable = sceneBeside.LegendColumnLeft + 8 >= width; |
| 299 | var needBelow = besideUnusable |
| 300 | || textRoomBeside < GraphControlFlowLayoutMetrics.LegendSideColumnMinTextWidth |
| 301 | || contentLegendNeed > textRoomBeside + 0.5; |
| 302 | if (!needBelow) |
| 303 | return sceneBeside; |
| 304 | |
| 305 | var hasShapeKeyRows = showLegendReturnKey || showLegendConditionKey || showLegendExceptionFlowKey; |
| 306 | var capEst = sceneBeside.SideLabelFontSizePx ?? 11.0; |
| 307 | var estimatedLegendH = GraphControlFlowLayoutMetrics.EstimateLegendBlockHeight( |
| 308 | legendRows.Count, |
| 309 | hasShapeKeyRows, |
| 310 | edgeStyleLegendRowCount, |
| 311 | capEst); |
| 312 | var belowGap = GraphControlFlowLayoutMetrics.LegendBelowBlockGap; |
| 313 | var graphH = height - estimatedLegendH - belowGap; |
| 314 | if (graphH < GraphControlFlowLayoutMetrics.MinGraphHeightForBelowLegend) |
| 315 | return sceneBeside; |
| 316 | |
| 317 | var sceneBelow = BuildFor(graphH, 0); |
| 318 | if (sceneBelow.Nodes.Count == 0) |
| 319 | return sceneBeside; |
| 320 | |
| 321 | var maxBottom = 0.0; |
| 322 | foreach (var n in sceneBelow.Nodes) |
| 323 | maxBottom = Math.Max(maxBottom, n.Center.Y + n.Radius); |
| 324 | var legendTopY = maxBottom + belowGap; |
| 325 | if (legendTopY + estimatedLegendH > height + 1.0) |
| 326 | return sceneBeside; |
| 327 | |
| 328 | return new GraphLayoutScene |
| 329 | { |
| 330 | Nodes = sceneBelow.Nodes, |
| 331 | Edges = sceneBelow.Edges, |
| 332 | Legend = sceneBelow.Legend, |
| 333 | UseLegendColumn = useLegendColumn, |
| 334 | ShowLegendConditionKey = showLegendConditionKey, |
| 335 | ShowLegendReturnKey = showLegendReturnKey, |
| 336 | ShowLegendExceptionFlowKey = showLegendExceptionFlowKey, |
| 337 | ShowLegendEdgeStyleKey = showLegendEdgeStyleKey, |
| 338 | LegendColumnLeft = sidePadding, |
| 339 | LegendPlacement = GraphLegendBlockPlacement.BelowGraph, |
| 340 | LegendBlockTopY = legendTopY, |
| 341 | SideLabelFontSizePx = sceneBelow.SideLabelFontSizePx, |
| 342 | ShowNodeLegendGlyphs = showNodeLegendGlyphs, |
| 343 | ControlFlowMainAxis = sceneBelow.ControlFlowMainAxis |
| 344 | }; |
| 345 | } |
| 346 | |
| 347 | /// <summary>Оценка минимальной ширины колонки легенды (индекс + текст + блок ключей фигур).</summary> |
| 348 | private static double EstimateLegendColumnContentWidth( |
| 349 | IReadOnlyList<GraphLegendEntry> rows, |
| 350 | bool showReturnKey, |
| 351 | bool showConditionKey, |
| 352 | bool showExceptionKey, |
| 353 | bool showEdgeStyleKey = false) |
| 354 | { |
| 355 | const double charPx = 6.15; |
| 356 | const double idxPad = 36; |
| 357 | const double margin = 20; |
| 358 | var maxLine = 0; |
| 359 | foreach (var row in rows) |
| 360 | maxLine = Math.Max(maxLine, Math.Min(row.Text.Length, 220)); |
| 361 | |
| 362 | var body = idxPad + maxLine * charPx; |
| 363 | var keys = 0d; |
| 364 | if (showReturnKey || showConditionKey || showExceptionKey) |
| 365 | keys = idxPad + 96; |
| 366 | if (showEdgeStyleKey) |
| 367 | keys = Math.Max(keys, idxPad + 220); |
| 368 | |
| 369 | return Math.Max(body, keys) + margin; |
| 370 | } |
| 371 | |
| 372 | /// <summary>Блок «стили рёбер» в легенде: только если в графе есть нестандартные рёбра (пунктир, цикл).</summary> |
| 373 | private static void ComputeEdgeStyleLegend( |
| 374 | IReadOnlyList<GraphEdge> edges, |
| 375 | out bool show, |
| 376 | out int rowCount) |
| 377 | { |
| 378 | static bool KindContains(string? kind, string needle) => |
| 379 | !string.IsNullOrEmpty(kind) && kind.Contains(needle, StringComparison.OrdinalIgnoreCase); |
| 380 | |
| 381 | var needsNonSolidLegend = edges.Any(e => |
| 382 | KindContains(e.Kind, "conditional") |
| 383 | || KindContains(e.Kind, "exception") |
| 384 | || KindContains(e.Kind, "multibranch") |
| 385 | || KindContains(e.Kind, "loop")); |
| 386 | if (!needsNonSolidLegend) |
| 387 | { |
| 388 | show = false; |
| 389 | rowCount = 0; |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | show = true; |
| 394 | rowCount = 1; // сплошная — контраст с пунктиром |
| 395 | if (edges.Any(e => KindContains(e.Kind, "conditional") || KindContains(e.Kind, "exception"))) |
| 396 | rowCount++; |
| 397 | if (edges.Any(e => KindContains(e.Kind, "multibranch"))) |
| 398 | rowCount++; |
| 399 | if (edges.Any(e => KindContains(e.Kind, "loop"))) |
| 400 | rowCount++; |
| 401 | } |
| 402 | |
| 403 | private static Dictionary<string, List<string>> BuildOutgoing(IReadOnlyList<GraphEdge> edges) |
| 404 | { |
| 405 | var outgoing = new Dictionary<string, List<string>>(StringComparer.OrdinalIgnoreCase); |
| 406 | foreach (var e in edges) |
| 407 | { |
| 408 | if (!outgoing.TryGetValue(e.FromId, out var list)) |
| 409 | { |
| 410 | list = []; |
| 411 | outgoing[e.FromId] = list; |
| 412 | } |
| 413 | |
| 414 | list.Add(e.ToId); |
| 415 | } |
| 416 | |
| 417 | return outgoing; |
| 418 | } |
| 419 | |
| 420 | private static Dictionary<string, int> BuildDepthMap(string anchorId, Dictionary<string, List<string>> outgoing) |
| 421 | { |
| 422 | var depthById = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase) |
| 423 | { |
| 424 | [anchorId] = 0 |
| 425 | }; |
| 426 | var queue = new Queue<string>(); |
| 427 | queue.Enqueue(anchorId); |
| 428 | |
| 429 | while (queue.Count > 0) |
| 430 | { |
| 431 | var id = queue.Dequeue(); |
| 432 | var depth = depthById[id]; |
| 433 | if (!outgoing.TryGetValue(id, out var next)) |
| 434 | continue; |
| 435 | |
| 436 | foreach (var to in next) |
| 437 | { |
| 438 | if (depthById.ContainsKey(to)) |
| 439 | continue; |
| 440 | depthById[to] = depth + 1; |
| 441 | queue.Enqueue(to); |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | return depthById; |
| 446 | } |
| 447 | |
| 448 | private static string TruncateLabel(string label, int maxChars) |
| 449 | { |
| 450 | if (label.Length <= maxChars) |
| 451 | return label; |
| 452 | var take = Math.Max(1, maxChars - 1); |
| 453 | return label[..take] + "…"; |
| 454 | } |
| 455 | } |
| 456 | |