Core API

The Core package defines shared types, shape definitions, registries, and utilities used across parsing, layout, and rendering.

Shapes

Shapes implement a common interface:

export interface ShapeDefinition {
  id: string;
  bounds(ctx): { width: number; height: number };
  anchors(ctx): Anchor[];
  render(ctx, position): string; // returns SVG fragment
}

• bounds calculates dimensions based on content and style
• anchors returns connection points (N/E/S/W)
• render emits SVG for the shape using computed layout

Shape registry

import { shapeRegistry } from '@runiq/core';

const rect = shapeRegistry.get('rect');

Register custom shapes at runtime to extend the library.

Utilities

• Style merging and defaults
• Text measurement helpers
• Color and stroke utilities