recharts/es6/util/cursor/getCursorPoints.js

React charts

import { polarToCartesian } from '../PolarUtils';
import { getRadialCursorPoints } from './getRadialCursorPoints';
export function getCursorPoints(layout, activeCoordinate, offset) {
  var x1, y1, x2, y2;
  if (layout === 'horizontal') {
    x1 = activeCoordinate.x;
    x2 = x1;
    y1 = offset.top;
    y2 = offset.top + offset.height;
  } else if (layout === 'vertical') {
    y1 = activeCoordinate.y;
    y2 = y1;
    x1 = offset.left;
    x2 = offset.left + offset.width;
  } else if (activeCoordinate.cx != null && activeCoordinate.cy != null) {
    if (layout === 'centric') {
      var cx = activeCoordinate.cx,
        cy = activeCoordinate.cy,
        innerRadius = activeCoordinate.innerRadius,
        outerRadius = activeCoordinate.outerRadius,
        angle = activeCoordinate.angle;
      var innerPoint = polarToCartesian(cx, cy, innerRadius, angle);
      var outerPoint = polarToCartesian(cx, cy, outerRadius, angle);
      x1 = innerPoint.x;
      y1 = innerPoint.y;
      x2 = outerPoint.x;
      y2 = outerPoint.y;
    } else {
      return getRadialCursorPoints(activeCoordinate);
    }
  }
  return [{
    x: x1,
    y: y1
  }, {
    x: x2,
    y: y2
  }];
}