feat(lib): export edge utils #418

src/components/Edges/utils.ts

@@ -7,3 +7,25 @@ export const getMarkerEnd = (arrowHeadType?: ArrowHeadType, markerEndId?: string
 
   return typeof arrowHeadType !== 'undefined' ? `url(#react-flow__${arrowHeadType})` : 'none';
 };
+
+export interface GetCenterParams {
+  sourceX: number;
+  sourceY: number;
+  targetX: number;
+  targetY: number;
+}
+
+export const getCenter = ({
+  sourceX,
+  sourceY,
+  targetX,
+  targetY,
+}: GetCenterParams): [number, number, number, number] => {
+  const xOffset = Math.abs(targetX - sourceX) / 2;
+  const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
+
+  const yOffset = Math.abs(targetY - sourceY) / 2;
+  const centerY = targetY < sourceY ? targetY + yOffset : targetY - yOffset;
+
+  return [centerX, centerY, xOffset, yOffset];
+};