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feat: make arrow's offset configurable #21

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feat: make arrow's offset configurable #21

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8 changes: 5 additions & 3 deletions src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -21,8 +21,8 @@ export type Props<Schemes extends BaseSchemes> = {
transformer?: ((connection: Schemes['Connection']) => Transformer)
/** The curve factory function that defines the shape of the path. Default: `curveBundle.beta(0.9)` */
curve?: ((connection: Schemes['Connection']) => CurveFactoryLineOnly)
/** Customize/enable arrow. Allows to change arrow color (default: `steelblue`) and marker (default: `M-5,-10 L-5,10 L20,0 z)` */
arrow?: (connection: Schemes['Connection']) => boolean | { color?: string, marker?: string }
/** Customize/enable arrow. Allows to change arrow color (default: `steelblue`), marker (default: `M-5,-10 L-5,10 L20,0 z`) and offset (default: -15) */
arrow?: (connection: Schemes['Connection']) => boolean | { color?: string, marker?: string, offset?: number }
}

/**
Expand Down Expand Up @@ -53,15 +53,17 @@ export class ConnectionPathPlugin<Schemes extends BaseSchemes, K> extends Scope<
const { points, payload } = context.data
const curve = this.props?.curve ? this.props.curve(payload) : curveBundle.beta(0.9)
const transformer = this.props?.transformer ? this.props.transformer(payload) : Transformers.classic({})
const arrow = this.props?.arrow ? this.props.arrow(payload) : {};
const factory = new PathFactory(curve)
const transformedPoints = transformer(points)
const path = factory.getData(transformedPoints)
const arrowOffset = typeof arrow === 'object' && arrow.offset !== undefined ? arrow.offset : -15;

const p = document.createElementNS('http://www.w3.org/2000/svg', 'path')

p.setAttribute('d', path || classicConnectionPath(transformedPoints as [Position, Position], 0.3))

this.transforms.set(payload.id, getTransformAlong(p, -15))
this.transforms.set(payload.id, getTransformAlong(p, arrowOffset))
this.updateArrow(payload)

return path ? {
Expand Down