Package: github.com/pancsta/d2/d2layouts/d2talalayout/internal/labeling

package labeling Import Path github.com/pancsta/d2/d2layouts/d2talalayout/internal/labeling (on go.dev) Dependency Relation imports 10 packages, and imported by 4 packages

Involved Source Files arrowhead.go guard.go d model.go Package labeling places node, icon, edge, and arrowhead labels on a routed layout graph. It owns placement policy and search; layoutgraph owns the mutable graph records and geometry primitives. placement.go

Package-Level Type Names (only one)

/* sort by: alphabet | popularity */

type PositionedArrowheadLabel (struct) PositionedArrowheadLabel is the rendered box reserved beside one end of an edge route. Fields (total 7) Box geo.Box Box.Height float64 Box.TopLeft *geo.Point Box.Width float64 Edge *layoutgraph.Edge IsTarget bool Text string Methods (total 7) (*PositionedArrowheadLabel) Center() *geo.Point (*PositionedArrowheadLabel) Contains(p *geo.Point) bool (*PositionedArrowheadLabel) Copy() *geo.Box (*PositionedArrowheadLabel) Intersections(s geo.Segment) []*geo.Point (*PositionedArrowheadLabel) Intersects(s geo.Segment, buffer float64) bool Intersects returns true if the segment comes within buffer of the box ( PositionedArrowheadLabel) Overlaps(b2 geo.Box) bool (*PositionedArrowheadLabel) ToString() string Implements (at least one exported) *PositionedArrowheadLabel : github.com/pancsta/d2/lib/geo.Intersectable As Outputs Of (at least one exported) func PositionArrowheadLabel(edge *layoutgraph.Edge, isTarget bool, route geo.Route) *PositionedArrowheadLabel

Package-Level Functions (total 4)

func Initialize(graph *layoutgraph.Graph) Initialize reserves each explicit/default node-label and icon position before placement begins.

func Place(ctx context.Context, graph *layoutgraph.Graph) error Place chooses positions for every movable node label, icon, and routed edge label in graph.

func PlaceNewEdges(ctx context.Context, graph *layoutgraph.Graph, edges []*layoutgraph.Edge) error PlaceNewEdges chooses label positions only for edges, preserving all existing label placements in graph as obstacles.

func PositionArrowheadLabel(edge *layoutgraph.Edge, isTarget bool, route geo.Route) *PositionedArrowheadLabel PositionArrowheadLabel derives the renderer-compatible label box for one arrowhead. A nil result means that endpoint has no arrowhead label.

Package-Level Constants (only one)

const SharedSegmentClearance = 12.5 SharedSegmentClearance reserves space around shared route segments where an edge label would otherwise be ambiguous.