recharts/es6/shape/Curve.js

React charts

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/**
 * @fileOverview Curve
 */
import React, { PureComponent } from 'react';
import { line as shapeLine, area as shapeArea, curveBasisClosed, curveBasisOpen, curveBasis, curveLinearClosed, curveLinear, curveMonotoneX, curveMonotoneY, curveNatural, curveStep, curveStepAfter, curveStepBefore } from 'd3-shape';
import classNames from 'classnames';
import { adaptEventHandlers, filterProps } from '../util/types';
import { isNumber } from '../util/DataUtils';
var CURVE_FACTORIES = {
  curveBasisClosed: curveBasisClosed,
  curveBasisOpen: curveBasisOpen,
  curveBasis: curveBasis,
  curveLinearClosed: curveLinearClosed,
  curveLinear: curveLinear,
  curveMonotoneX: curveMonotoneX,
  curveMonotoneY: curveMonotoneY,
  curveNatural: curveNatural,
  curveStep: curveStep,
  curveStepAfter: curveStepAfter,
  curveStepBefore: curveStepBefore
};

var defined = function defined(p) {
  return p.x === +p.x && p.y === +p.y;
};

var getX = function getX(p) {
  return p.x;
};

var getY = function getY(p) {
  return p.y;
};

var getCurveFactory = function getCurveFactory(type, layout) {
  if (_isFunction(type)) {
    return type;
  }

  var name = "curve".concat(_upperFirst(type));

  if (name === 'curveMonotone' && layout) {
    return CURVE_FACTORIES["".concat(name).concat(layout === 'vertical' ? 'Y' : 'X')];
  }

  return CURVE_FACTORIES[name] || curveLinear;
};

export var Curve = /*#__PURE__*/function (_PureComponent) {
  _inherits(Curve, _PureComponent);

  var _super = _createSuper(Curve);

  function Curve() {
    _classCallCheck(this, Curve);

    return _super.apply(this, arguments);
  }

  _createClass(Curve, [{
    key: "getPath",

    /**
     * Calculate the path of curve
     * @return {String} path
     */
    value: function getPath() {
      var _this$props = this.props,
          type = _this$props.type,
          points = _this$props.points,
          baseLine = _this$props.baseLine,
          layout = _this$props.layout,
          connectNulls = _this$props.connectNulls;
      var curveFactory = getCurveFactory(type, layout);
      var formatPoints = connectNulls ? points.filter(function (entry) {
        return defined(entry);
      }) : points;
      var lineFunction;

      if (_isArray(baseLine)) {
        var formatBaseLine = connectNulls ? baseLine.filter(function (base) {
          return defined(base);
        }) : baseLine;
        var areaPoints = formatPoints.map(function (entry, index) {
          return _objectSpread(_objectSpread({}, entry), {}, {
            base: formatBaseLine[index]
          });
        });

        if (layout === 'vertical') {
          lineFunction = shapeArea().y(getY).x1(getX).x0(function (d) {
            return d.base.x;
          });
        } else {
          lineFunction = shapeArea().x(getX).y1(getY).y0(function (d) {
            return d.base.y;
          });
        }

        lineFunction.defined(defined).curve(curveFactory);
        return lineFunction(areaPoints);
      }

      if (layout === 'vertical' && isNumber(baseLine)) {
        lineFunction = shapeArea().y(getY).x1(getX).x0(baseLine);
      } else if (isNumber(baseLine)) {
        lineFunction = shapeArea().x(getX).y1(getY).y0(baseLine);
      } else {
        lineFunction = shapeLine().x(getX).y(getY);
      }

      lineFunction.defined(defined).curve(curveFactory);
      return lineFunction(formatPoints);
    }
  }, {
    key: "render",
    value: function render() {
      var _this$props2 = this.props,
          className = _this$props2.className,
          points = _this$props2.points,
          path = _this$props2.path,
          pathRef = _this$props2.pathRef;

      if ((!points || !points.length) && !path) {
        return null;
      }

      var realPath = points && points.length ? this.getPath() : path;
      return /*#__PURE__*/React.createElement("path", _extends({}, filterProps(this.props), adaptEventHandlers(this.props), {
        className: classNames('recharts-curve', className),
        d: realPath,
        ref: pathRef
      }));
    }
  }]);

  return Curve;
}(PureComponent);
Curve.defaultProps = {
  type: 'linear',
  points: [],
  connectNulls: false
};