@ichigo_san/graphing/dist/edges/floatingUtils.js

A lightweight UML-style diagram editor built with React Flow and Tailwind CSS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getEdgeParams = getEdgeParams;
var _reactflow = require("reactflow");
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
// Calculate intersection point of the line between node centers and the target node
function getNodeIntersection(intersectionNode, targetNode) {
  var _intersectionNode$__r;
  const {
    width: sourceWidth = 0,
    height: sourceHeight = 0
  } = (_intersectionNode$__r = intersectionNode.__rf) !== null && _intersectionNode$__r !== void 0 && _intersectionNode$__r.width ? {
    width: intersectionNode.__rf.width,
    height: intersectionNode.__rf.height
  } : intersectionNode.measured || {};
  const intersectionPos = intersectionNode.positionAbsolute || intersectionNode.position || {
    x: 0,
    y: 0
  };
  const targetPosition = targetNode.positionAbsolute || targetNode.position || {
    x: 0,
    y: 0
  };
  const w = sourceWidth / 2;
  const h = sourceHeight / 2;
  if (w === 0 || h === 0) {
    // Node dimensions not yet available
    return intersectionPos;
  }
  const x2 = intersectionPos.x + w;
  const y2 = intersectionPos.y + h;
  const x1 = targetPosition.x + w;
  const y1 = targetPosition.y + h;
  const xx1 = (x1 - x2) / (2 * w) - (y1 - y2) / (2 * h);
  const yy1 = (x1 - x2) / (2 * w) + (y1 - y2) / (2 * h);
  const a = 1 / (Math.abs(xx1) + Math.abs(yy1));
  const xx3 = a * xx1;
  const yy3 = a * yy1;
  const x = w * (xx3 + yy3) + x2;
  const y = h * (-xx3 + yy3) + y2;
  return {
    x,
    y
  };
}
function getEdgePosition(node, intersectionPoint) {
  var _ref, _n$measured$width, _n$measured, _node$__rf, _ref2, _n$measured$height, _n$measured2, _node$__rf2;
  const n = _objectSpread(_objectSpread({}, node.position), node);
  const nx = Math.round(n.x);
  const ny = Math.round(n.y);
  const px = Math.round(intersectionPoint.x);
  const py = Math.round(intersectionPoint.y);
  if (px <= nx + 1) {
    return _reactflow.Position.Left;
  }
  if (px >= nx + ((_ref = (_n$measured$width = (_n$measured = n.measured) === null || _n$measured === void 0 ? void 0 : _n$measured.width) !== null && _n$measured$width !== void 0 ? _n$measured$width : (_node$__rf = node.__rf) === null || _node$__rf === void 0 ? void 0 : _node$__rf.width) !== null && _ref !== void 0 ? _ref : 0) - 1) {
    return _reactflow.Position.Right;
  }
  if (py <= ny + 1) {
    return _reactflow.Position.Top;
  }
  if (py >= n.y + ((_ref2 = (_n$measured$height = (_n$measured2 = n.measured) === null || _n$measured2 === void 0 ? void 0 : _n$measured2.height) !== null && _n$measured$height !== void 0 ? _n$measured$height : (_node$__rf2 = node.__rf) === null || _node$__rf2 === void 0 ? void 0 : _node$__rf2.height) !== null && _ref2 !== void 0 ? _ref2 : 0) - 1) {
    return _reactflow.Position.Bottom;
  }
  return _reactflow.Position.Top;
}
function getEdgeParams(source, target) {
  const sourceIntersectionPoint = getNodeIntersection(source, target);
  const targetIntersectionPoint = getNodeIntersection(target, source);
  const sourcePos = getEdgePosition(source, sourceIntersectionPoint);
  const targetPos = getEdgePosition(target, targetIntersectionPoint);
  return {
    sx: sourceIntersectionPoint.x,
    sy: sourceIntersectionPoint.y,
    tx: targetIntersectionPoint.x,
    ty: targetIntersectionPoint.y,
    sourcePos,
    targetPos
  };
}