elk 0.2.0

Pure Dart layered graph layout (Sugiyama-style), inspired by the Eclipse Layout Kernel. Compound/hierarchical graphs, ports and orthogonal edge routing, with an elkjs-style graph API. No Flutter, no I [...]

0.2.0

• Implement distinct INCLUDE_CHILDREN, SEPARATE_CHILDREN, and INHERIT modes, including JSON aliases and independent direction/hierarchy inheritance. Separated cross-boundary edges remain in the result without route sections or fabricated label positions. Full coordinated hierarchy optimization remains outside the supported contract.
• Preserve deep hierarchy endpoints, labels, and orthogonal boundary routes across nested directions and compound title bands.
• Correct four-side explicit port placement, outward edge attachment, and internal compound-boundary attachment. Preserve self-loop clearance beyond nonzero port rectangles and reserve matching layout margins.
• Place edge, node, and port labels; support crossing constraints and hyperedge junctions; improve self-loop sizing and edge straightening.
• Honor cycle-breaking, model-order, edge-merging, and Brandes–Köpf alignment choices exposed by the public API.
• Parse standard ELK option aliases and spacing keys while retaining legacy aliases. Honor explicit asymmetric root padding in all four directions.
• Include ports, labels, routed strokes, and loops in returned layout bounds.

0.1.1

• Fixed explicit north/south ports attaching to the opposite side of nodes in ElkDirection.up layouts.

0.1.0

• Initial release.
• Ports: ElkPort.side / ElkPortSide; edges may reference port ids and attach at computed border points (ElkPositionedNode.ports).
• elkjs JSON ingestion: ElkGraph.fromJson (and fromJson on nodes/edges/ ports/labels) parse the elkjs graph JSON shape.
• Validation harness (tool/validation/) comparing structural agreement against real elkjs.
• ELK-style layered layout: cycle breaking, network-simplex layering, crossing minimization, Brandes–Köpf coordinate assignment.
• Orthogonal edge routing with computed bend points and parallel-edge lanes.
• Compound graphs / clusters with parent-relative result coordinates.
• ELK spacing model (spacing.baseValue), model order constraints, and Brandes–Köpf fixed-alignment options.
• elkjs-style graph API (ElkGraph / ElkNode / ElkEdge → ElkResult).