@formant/ava-react/esm/NarrativeTextVis/line-charts/line/useLineCompute.js

React components of AVA.

function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }
function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }
function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : String(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); }
import { useState, useEffect } from 'react';
import { seedToken } from "../../theme";
import { scaleLinear } from "./scaleLinear";

// adjust to draw line width
var SCALE_ADJUST = 2;
var Line = /*#__PURE__*/function () {
  function Line(size, data) {
    _classCallCheck(this, Line);
    _defineProperty(this, "data", []);
    _defineProperty(this, "size", seedToken.fontSizeBase);
    _defineProperty(this, "height", this.size);
    _defineProperty(this, "width", this.getWidth());
    _defineProperty(this, "xScale", void 0);
    _defineProperty(this, "yScale", void 0);
    _defineProperty(this, "points", []);
    this.size = size;
    this.data = data;
    this.compute();
  }
  _createClass(Line, [{
    key: "getWidth",
    value: function getWidth() {
      var _this$data;
      return Math.max(this.size * 2, ((_this$data = this.data) === null || _this$data === void 0 ? void 0 : _this$data.length) * 2);
    }
  }, {
    key: "compute",
    value: function compute() {
      var _this$data2,
        _this = this;
      if (!this.data) return;
      this.height = this.size;
      this.width = this.getWidth();
      this.xScale = scaleLinear([0, this.width], [0, ((_this$data2 = this.data) === null || _this$data2 === void 0 ? void 0 : _this$data2.length) - 1]);
      var _ref = [Math.min.apply(Math, _toConsumableArray(this.data)), Math.max.apply(Math, _toConsumableArray(this.data))],
        min = _ref[0],
        max = _ref[1];
      this.yScale = scaleLinear([SCALE_ADJUST, this.height - SCALE_ADJUST], [min, max]);
      this.points = this.data.map(function (item, index) {
        var _this$xScale, _this$yScale;
        return [(_this$xScale = _this.xScale) === null || _this$xScale === void 0 ? void 0 : _this$xScale.call(_this, index), _this.height - ((_this$yScale = _this.yScale) === null || _this$yScale === void 0 ? void 0 : _this$yScale.call(_this, item))];
      });
    }
  }, {
    key: "getLinePath",
    value: function getLinePath() {
      var _this$data3;
      if (!((_this$data3 = this.data) !== null && _this$data3 !== void 0 && _this$data3.length) || !this.xScale || !this.yScale) return null;
      var path = this.points.reduce(function (prev, _ref2, index) {
        var _ref3 = _slicedToArray(_ref2, 2),
          x = _ref3[0],
          y = _ref3[1];
        if (index === 0) return "M".concat(x, " ").concat(y);
        return "".concat(prev, " L ").concat(x, " ").concat(y);
      }, '');
      return path;
    }
  }, {
    key: "getPolygonPath",
    value: function getPolygonPath() {
      var _this$data4;
      if (!((_this$data4 = this.data) !== null && _this$data4 !== void 0 && _this$data4.length) || !this.xScale || !this.yScale) return null;
      var polygonPoints = _toConsumableArray(this.points);
      var last = this.points[this.points.length - 1];
      polygonPoints.push([last[0], this.height]);
      polygonPoints.push([0, this.height]);
      var startPoint = this.points[0];
      polygonPoints.push(startPoint);
      var path = polygonPoints.reduce(function (prev, _ref4) {
        var _ref5 = _slicedToArray(_ref4, 2),
          x = _ref5[0],
          y = _ref5[1];
        return "".concat(prev, " ").concat(x, ",").concat(y);
      }, '');
      return path;
    }
  }, {
    key: "getContainer",
    value: function getContainer() {
      return [this.width, this.height];
    }
  }]);
  return Line;
}();
export var useLineCompute = function useLineCompute(size, data) {
  var _useState = useState(new Line(size, data)),
    _useState2 = _slicedToArray(_useState, 2),
    line = _useState2[0],
    setLine = _useState2[1];
  useEffect(function () {
    setLine(new Line(size, data));
  }, [size, data]);
  return {
    width: line.getContainer()[0],
    height: line.getContainer()[1],
    linePath: line.getLinePath(),
    polygonPath: line.getPolygonPath()
  };
};