react-svg-line-chart/lib/index.js

A lightweight responsive line chart component for React using only SVG

"use strict";

exports.__esModule = true;

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _templateObject = _taggedTemplateLiteralLoose(["\n  display: block;\n  overflow: visible;\n"], ["\n  display: block;\n  overflow: visible;\n"]);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require("react");

var _react2 = _interopRequireDefault(_react);

var _styledComponents = require("styled-components");

var _styledComponents2 = _interopRequireDefault(_styledComponents);

var _Grid = require("./components/Grid");

var _Grid2 = _interopRequireDefault(_Grid);

var _Path = require("./components/Path");

var _Path2 = _interopRequireDefault(_Path);

var _Points = require("./components/Points");

var _Points2 = _interopRequireDefault(_Points);

var _Axis = require("./components/Axis");

var _Axis2 = _interopRequireDefault(_Axis);

var _Labels = require("./components/Labels");

var _Labels2 = _interopRequireDefault(_Labels);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

function _taggedTemplateLiteralLoose(strings, raw) { strings.raw = raw; return strings; }

var Svg = _styledComponents2.default.svg(_templateObject);

function round(n) {
  return Math.round(n * 100) / 100;
}

var LineChart = function (_React$Component) {
  _inherits(LineChart, _React$Component);

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

    return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
  }

  LineChart.prototype.getMinX = function getMinX() {
    var data = this.props.data;

    return data.length > 0 ? data[0].x : 0;
  };

  LineChart.prototype.getMaxX = function getMaxX() {
    var data = this.props.data;

    return data.length > 0 ? data[data.length - 1].x : 0;
  };

  LineChart.prototype.getMinY = function getMinY() {
    return 0;
  };

  LineChart.prototype.getMaxY = function getMaxY() {
    var _props = this.props,
        data = _props.data,
        labelsCountY = _props.labelsCountY;

    var yStep = labelsCountY > 0 ? labelsCountY : 1;
    var maxY = data.length > 0 ? data.reduce(function (max, point) {
      return point.y > max ? point.y : max;
    }, data[0].y) : 0;
    return maxY ? Math.ceil(maxY / yStep) * yStep : yStep;
  };

  LineChart.prototype.getSvgX = function getSvgX(x) {
    var viewBoxWidth = this.props.viewBoxWidth;

    var minX = this.getMinX();
    var maxX = this.getMaxX();
    var paddingLeft = this.getLabelsYWidth();
    return round((x - minX) / (maxX - minX) * (Math.abs(viewBoxWidth) - paddingLeft));
  };

  LineChart.prototype.getSvgY = function getSvgY(y) {
    var _props2 = this.props,
        labelsVisible = _props2.labelsVisible,
        viewBoxHeight = _props2.viewBoxHeight,
        labelsOffsetX = _props2.labelsOffsetX,
        labelsHeightX = _props2.labelsHeightX;

    var paddingBottom = labelsVisible ? labelsHeightX + labelsOffsetX : 0;
    var height = Math.abs(viewBoxHeight) - paddingBottom;
    var maxY = this.getMaxY();
    return round(height - y / maxY * height);
  };

  LineChart.prototype.getLabelsYWidth = function getLabelsYWidth() {
    var _props3 = this.props,
        labelsVisible = _props3.labelsVisible,
        labelsOffsetY = _props3.labelsOffsetY,
        labelsCharacterWidth = _props3.labelsCharacterWidth;

    var maxY = this.getMaxY();
    return labelsVisible ? maxY.toString().length * labelsCharacterWidth + labelsOffsetY : 0;
  };

  LineChart.prototype.render = function render() {
    var _props4 = this.props,
        viewBoxHeight = _props4.viewBoxHeight,
        viewBoxWidth = _props4.viewBoxWidth,
        props = _objectWithoutProperties(_props4, ["viewBoxHeight", "viewBoxWidth"]);

    var minX = this.getMinX();
    var maxX = this.getMaxX();
    var maxY = this.getMaxY();
    var minY = this.getMinY();

    var commonProps = {
      getX: this.getSvgX.bind(this),
      getY: this.getSvgY.bind(this),
      maxX: maxX,
      maxY: maxY,
      minX: minX,
      minY: minY
    };

    return _react2.default.createElement(
      Svg,
      { viewBox: "0 0 " + Math.abs(viewBoxWidth) + " " + Math.abs(viewBoxHeight) },
      _react2.default.createElement(
        "g",
        { transform: "translate(" + this.getLabelsYWidth() + ", 0)" },
        _react2.default.createElement(_Grid2.default, _extends({}, props, commonProps)),
        _react2.default.createElement(_Path2.default, _extends({}, props, commonProps)),
        _react2.default.createElement(_Axis2.default, _extends({}, props, commonProps)),
        _react2.default.createElement(_Points2.default, _extends({}, props, commonProps)),
        _react2.default.createElement(_Labels2.default, _extends({}, props, commonProps))
      )
    );
  };

  return LineChart;
}(_react2.default.Component);

LineChart.propTypes = process.env.NODE_ENV !== "production" ? _extends({
  data: _propTypes2.default.arrayOf(_propTypes2.default.shape({
    x: _propTypes2.default.number,
    y: _propTypes2.default.number
  })).isRequired,
  viewBoxHeight: _propTypes2.default.number,
  viewBoxWidth: _propTypes2.default.number
}, _Grid2.default.propTypes, _Axis2.default.propTypes, _Points2.default.propTypes, _Labels2.default.propTypes) : {};

LineChart.defaultProps = _extends({
  data: [],
  viewBoxHeight: 300,
  viewBoxWidth: 800
}, _Grid2.default.defaultProps, _Axis2.default.defaultProps, _Points2.default.defaultProps, _Labels2.default.defaultProps);

exports.default = LineChart;
module.exports = exports["default"];