{"version":3,"file":"line-DPKy4GZh.cjs","names":["constant","curveLinear","x","pointX","y","pointY","array"],"sources":["../node_modules/d3-path/src/path.js","../node_modules/d3-shape/src/path.js","../node_modules/d3-shape/src/curve/linear.js","../node_modules/d3-shape/src/point.js","../node_modules/d3-shape/src/line.js"],"sourcesContent":["const pi = Math.PI,\n    tau = 2 * pi,\n    epsilon = 1e-6,\n    tauEpsilon = tau - epsilon;\n\nfunction append(strings) {\n  this._ += strings[0];\n  for (let i = 1, n = strings.length; i < n; ++i) {\n    this._ += arguments[i] + strings[i];\n  }\n}\n\nfunction appendRound(digits) {\n  let d = Math.floor(digits);\n  if (!(d >= 0)) throw new Error(`invalid digits: ${digits}`);\n  if (d > 15) return append;\n  const k = 10 ** d;\n  return function(strings) {\n    this._ += strings[0];\n    for (let i = 1, n = strings.length; i < n; ++i) {\n      this._ += Math.round(arguments[i] * k) / k + strings[i];\n    }\n  };\n}\n\nexport class Path {\n  constructor(digits) {\n    this._x0 = this._y0 = // start of current subpath\n    this._x1 = this._y1 = null; // end of current subpath\n    this._ = \"\";\n    this._append = digits == null ? append : appendRound(digits);\n  }\n  moveTo(x, y) {\n    this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}`;\n  }\n  closePath() {\n    if (this._x1 !== null) {\n      this._x1 = this._x0, this._y1 = this._y0;\n      this._append`Z`;\n    }\n  }\n  lineTo(x, y) {\n    this._append`L${this._x1 = +x},${this._y1 = +y}`;\n  }\n  quadraticCurveTo(x1, y1, x, y) {\n    this._append`Q${+x1},${+y1},${this._x1 = +x},${this._y1 = +y}`;\n  }\n  bezierCurveTo(x1, y1, x2, y2, x, y) {\n    this._append`C${+x1},${+y1},${+x2},${+y2},${this._x1 = +x},${this._y1 = +y}`;\n  }\n  arcTo(x1, y1, x2, y2, r) {\n    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(`negative radius: ${r}`);\n\n    let x0 = this._x1,\n        y0 = this._y1,\n        x21 = x2 - x1,\n        y21 = y2 - y1,\n        x01 = x0 - x1,\n        y01 = y0 - y1,\n        l01_2 = x01 * x01 + y01 * y01;\n\n    // Is this path empty? Move to (x1,y1).\n    if (this._x1 === null) {\n      this._append`M${this._x1 = x1},${this._y1 = y1}`;\n    }\n\n    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.\n    else if (!(l01_2 > epsilon));\n\n    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?\n    // Equivalently, is (x1,y1) coincident with (x2,y2)?\n    // Or, is the radius zero? Line to (x1,y1).\n    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {\n      this._append`L${this._x1 = x1},${this._y1 = y1}`;\n    }\n\n    // Otherwise, draw an arc!\n    else {\n      let x20 = x2 - x0,\n          y20 = y2 - y0,\n          l21_2 = x21 * x21 + y21 * y21,\n          l20_2 = x20 * x20 + y20 * y20,\n          l21 = Math.sqrt(l21_2),\n          l01 = Math.sqrt(l01_2),\n          l = r * Math.tan((pi - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),\n          t01 = l / l01,\n          t21 = l / l21;\n\n      // If the start tangent is not coincident with (x0,y0), line to.\n      if (Math.abs(t01 - 1) > epsilon) {\n        this._append`L${x1 + t01 * x01},${y1 + t01 * y01}`;\n      }\n\n      this._append`A${r},${r},0,0,${+(y01 * x20 > x01 * y20)},${this._x1 = x1 + t21 * x21},${this._y1 = y1 + t21 * y21}`;\n    }\n  }\n  arc(x, y, r, a0, a1, ccw) {\n    x = +x, y = +y, r = +r, ccw = !!ccw;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(`negative radius: ${r}`);\n\n    let dx = r * Math.cos(a0),\n        dy = r * Math.sin(a0),\n        x0 = x + dx,\n        y0 = y + dy,\n        cw = 1 ^ ccw,\n        da = ccw ? a0 - a1 : a1 - a0;\n\n    // Is this path empty? Move to (x0,y0).\n    if (this._x1 === null) {\n      this._append`M${x0},${y0}`;\n    }\n\n    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).\n    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {\n      this._append`L${x0},${y0}`;\n    }\n\n    // Is this arc empty? We’re done.\n    if (!r) return;\n\n    // Does the angle go the wrong way? Flip the direction.\n    if (da < 0) da = da % tau + tau;\n\n    // Is this a complete circle? Draw two arcs to complete the circle.\n    if (da > tauEpsilon) {\n      this._append`A${r},${r},0,1,${cw},${x - dx},${y - dy}A${r},${r},0,1,${cw},${this._x1 = x0},${this._y1 = y0}`;\n    }\n\n    // Is this arc non-empty? Draw an arc!\n    else if (da > epsilon) {\n      this._append`A${r},${r},0,${+(da >= pi)},${cw},${this._x1 = x + r * Math.cos(a1)},${this._y1 = y + r * Math.sin(a1)}`;\n    }\n  }\n  rect(x, y, w, h) {\n    this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}h${w = +w}v${+h}h${-w}Z`;\n  }\n  toString() {\n    return this._;\n  }\n}\n\nexport function path() {\n  return new Path;\n}\n\n// Allow instanceof d3.path\npath.prototype = Path.prototype;\n\nexport function pathRound(digits = 3) {\n  return new Path(+digits);\n}\n","import {Path} from \"d3-path\";\n\nexport function withPath(shape) {\n  let digits = 3;\n\n  shape.digits = function(_) {\n    if (!arguments.length) return digits;\n    if (_ == null) {\n      digits = null;\n    } else {\n      const d = Math.floor(_);\n      if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);\n      digits = d;\n    }\n    return shape;\n  };\n\n  return () => new Path(digits);\n}\n","function Linear(context) {\n  this._context = context;\n}\n\nLinear.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // falls through\n      default: this._context.lineTo(x, y); break;\n    }\n  }\n};\n\nexport default function(context) {\n  return new Linear(context);\n}\n","export function x(p) {\n  return p[0];\n}\n\nexport function y(p) {\n  return p[1];\n}\n","import array from \"./array.js\";\nimport constant from \"./constant.js\";\nimport curveLinear from \"./curve/linear.js\";\nimport {withPath} from \"./path.js\";\nimport {x as pointX, y as pointY} from \"./point.js\";\n\nexport default function(x, y) {\n  var defined = constant(true),\n      context = null,\n      curve = curveLinear,\n      output = null,\n      path = withPath(line);\n\n  x = typeof x === \"function\" ? x : (x === undefined) ? pointX : constant(x);\n  y = typeof y === \"function\" ? y : (y === undefined) ? pointY : constant(y);\n\n  function line(data) {\n    var i,\n        n = (data = array(data)).length,\n        d,\n        defined0 = false,\n        buffer;\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) output.lineStart();\n        else output.lineEnd();\n      }\n      if (defined0) output.point(+x(d, i, data), +y(d, i, data));\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  line.x = function(_) {\n    return arguments.length ? 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(_ == null ? context = output = null : output = curve(context = _), line) : context;\n  };\n\n  return 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