dygraphs
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dygraphs is a fast, flexible open source JavaScript charting library.
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JavaScript
'use strict';
/**
* @license
* Copyright 2011 Dan Vanderkam (danvdk@gmail.com)
* MIT-licenced: https://opensource.org/license/MIT
*/
/**
* @fileoverview Based on PlotKitLayout, but modified to meet the needs of
* dygraphs.
*/
/*global Dygraph:false */
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var utils = _interopRequireWildcard(require("./dygraph-utils"));
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
/**
* Creates a new DygraphLayout object.
*
* This class contains all the data to be charted.
* It uses data coordinates, but also records the chart range (in data
* coordinates) and hence is able to calculate percentage positions ('In this
* view, Point A lies 25% down the x-axis.')
*
* Two things that it does not do are:
* 1. Record pixel coordinates for anything.
* 2. (oddly) determine anything about the layout of chart elements.
*
* The naming is a vestige of Dygraph's original PlotKit roots.
*
* @constructor
*/
var DygraphLayout = function DygraphLayout(dygraph) {
this.dygraph_ = dygraph;
/**
* Array of points for each series.
*
* [series index][row index in series] = |Point| structure,
* where series index refers to visible series only, and the
* point index is for the reduced set of points for the current
* zoom region (including one point just outside the window).
* All points in the same row index share the same X value.
*
* @type {Array.<Array.<Dygraph.PointType>>}
*/
this.points = [];
this.setNames = [];
this.annotations = [];
this.yAxes_ = null;
// TODO(danvk): it's odd that xTicks_ and yTicks_ are inputs,
// but xticks and yticks are outputs. Clean this up.
this.xTicks_ = null;
this.yTicks_ = null;
};
/**
* Add points for a single series.
*
* @param {string} setname Name of the series.
* @param {Array.<Dygraph.PointType>} set_xy Points for the series.
*/
DygraphLayout.prototype.addDataset = function (setname, set_xy) {
this.points.push(set_xy);
this.setNames.push(setname);
};
/**
* Returns the box which the chart should be drawn in. This is the canvas's
* box, less space needed for the axis and chart labels.
*
* @return {{x: number, y: number, w: number, h: number}}
*/
DygraphLayout.prototype.getPlotArea = function () {
return this.area_;
};
// Compute the box which the chart should be drawn in. This is the canvas's
// box, less space needed for axis, chart labels, and other plug-ins.
// NOTE: This should only be called by Dygraph.predraw_().
DygraphLayout.prototype.computePlotArea = function () {
var area = {
// TODO(danvk): per-axis setting.
x: 0,
y: 0
};
area.w = this.dygraph_.width_ - area.x - this.dygraph_.getOption('rightGap');
area.h = this.dygraph_.height_;
// Let plugins reserve space.
var e = {
chart_div: this.dygraph_.graphDiv,
reserveSpaceLeft: function reserveSpaceLeft(px) {
var r = {
x: area.x,
y: area.y,
w: px,
h: area.h
};
area.x += px;
area.w -= px;
return r;
},
reserveSpaceRight: function reserveSpaceRight(px) {
var r = {
x: area.x + area.w - px,
y: area.y,
w: px,
h: area.h
};
area.w -= px;
return r;
},
reserveSpaceTop: function reserveSpaceTop(px) {
var r = {
x: area.x,
y: area.y,
w: area.w,
h: px
};
area.y += px;
area.h -= px;
return r;
},
reserveSpaceBottom: function reserveSpaceBottom(px) {
var r = {
x: area.x,
y: area.y + area.h - px,
w: area.w,
h: px
};
area.h -= px;
return r;
},
chartRect: function chartRect() {
return {
x: area.x,
y: area.y,
w: area.w,
h: area.h
};
}
};
this.dygraph_.cascadeEvents_('layout', e);
this.area_ = area;
};
DygraphLayout.prototype.setAnnotations = function (ann) {
// The Dygraph object's annotations aren't parsed. We parse them here and
// save a copy. If there is no parser, then the user must be using raw format.
this.annotations = [];
var parse = this.dygraph_.getOption('xValueParser') || function (x) {
return x;
};
for (var i = 0; i < ann.length; i++) {
var a = {};
if (!ann[i].xval && ann[i].x === undefined) {
console.error("Annotations must have an 'x' property");
return;
}
if (ann[i].icon && !(ann[i].hasOwnProperty('width') && ann[i].hasOwnProperty('height'))) {
console.error("Must set width and height when setting " + "annotation.icon property");
return;
}
utils.update(a, ann[i]);
if (!a.xval) a.xval = parse(a.x);
this.annotations.push(a);
}
};
DygraphLayout.prototype.setXTicks = function (xTicks) {
this.xTicks_ = xTicks;
};
// TODO(danvk): add this to the Dygraph object's API or move it into Layout.
DygraphLayout.prototype.setYAxes = function (yAxes) {
this.yAxes_ = yAxes;
};
DygraphLayout.prototype.evaluate = function () {
this._xAxis = {};
this._evaluateLimits();
this._evaluateLineCharts();
this._evaluateLineTicks();
this._evaluateAnnotations();
};
DygraphLayout.prototype._evaluateLimits = function () {
var xlimits = this.dygraph_.xAxisRange();
this._xAxis.minval = xlimits[0];
this._xAxis.maxval = xlimits[1];
var xrange = xlimits[1] - xlimits[0];
this._xAxis.scale = xrange !== 0 ? 1 / xrange : 1.0;
if (this.dygraph_.getOptionForAxis("logscale", 'x')) {
this._xAxis.xlogrange = utils.log10(this._xAxis.maxval) - utils.log10(this._xAxis.minval);
this._xAxis.xlogscale = this._xAxis.xlogrange !== 0 ? 1.0 / this._xAxis.xlogrange : 1.0;
}
for (var i = 0; i < this.yAxes_.length; i++) {
var axis = this.yAxes_[i];
axis.minyval = axis.computedValueRange[0];
axis.maxyval = axis.computedValueRange[1];
axis.yrange = axis.maxyval - axis.minyval;
axis.yscale = axis.yrange !== 0 ? 1.0 / axis.yrange : 1.0;
if (this.dygraph_.getOption("logscale") || axis.logscale) {
axis.ylogrange = utils.log10(axis.maxyval) - utils.log10(axis.minyval);
axis.ylogscale = axis.ylogrange !== 0 ? 1.0 / axis.ylogrange : 1.0;
if (!isFinite(axis.ylogrange) || isNaN(axis.ylogrange)) {
console.error('axis ' + i + ' of graph at ' + axis.g + ' can\'t be displayed in log scale for range [' + axis.minyval + ' - ' + axis.maxyval + ']');
}
}
}
};
DygraphLayout.calcXNormal_ = function (value, xAxis, logscale) {
if (logscale) {
return (utils.log10(value) - utils.log10(xAxis.minval)) * xAxis.xlogscale;
} else {
return (value - xAxis.minval) * xAxis.scale;
}
};
/**
* @param {DygraphAxisType} axis
* @param {number} value
* @param {boolean} logscale
* @return {number}
*/
DygraphLayout.calcYNormal_ = function (axis, value, logscale) {
if (logscale) {
var x = 1.0 - (utils.log10(value) - utils.log10(axis.minyval)) * axis.ylogscale;
return isFinite(x) ? x : NaN; // shim for v8 issue; see pull request 276
} else {
return 1.0 - (value - axis.minyval) * axis.yscale;
}
};
DygraphLayout.prototype._evaluateLineCharts = function () {
var isStacked = this.dygraph_.getOption("stackedGraph");
var isLogscaleForX = this.dygraph_.getOptionForAxis("logscale", 'x');
for (var setIdx = 0; setIdx < this.points.length; setIdx++) {
var points = this.points[setIdx];
var setName = this.setNames[setIdx];
var connectSeparated = this.dygraph_.getOption('connectSeparatedPoints', setName);
var axis = this.dygraph_.axisPropertiesForSeries(setName);
// TODO (konigsberg): use optionsForAxis instead.
var logscale = this.dygraph_.attributes_.getForSeries("logscale", setName);
var outOfXBounds = 0,
outOfYBounds = 0;
for (var j = 0; j < points.length; j++) {
var point = points[j];
// Range from 0-1 where 0 represents left and 1 represents right.
point.x = DygraphLayout.calcXNormal_(point.xval, this._xAxis, isLogscaleForX);
outOfXBounds += point.x < 0 || point.x > 1;
// Range from 0-1 where 0 represents top and 1 represents bottom
var yval = point.yval;
if (isStacked) {
point.y_stacked = DygraphLayout.calcYNormal_(axis, point.yval_stacked, logscale);
if (yval !== null && !isNaN(yval)) {
yval = point.yval_stacked;
}
}
if (yval === null) {
yval = NaN;
if (!connectSeparated) {
point.yval = NaN;
}
}
point.y = DygraphLayout.calcYNormal_(axis, yval, logscale);
outOfYBounds += point.y < 0 || point.y > 1;
}
if (outOfXBounds > 2) {
console.warn(outOfXBounds + ' points out of X bounds:' + this._xAxis.minval + ' - ' + this._xAxis.maxval);
}
if (outOfYBounds > 0) {
console.warn(outOfYBounds + ' points out of Y bounds:' + axis.minyval + ' - ' + axis.maxyval);
}
this.dygraph_.dataHandler_.onLineEvaluated(points, axis, logscale);
}
};
DygraphLayout.prototype._evaluateLineTicks = function () {
var i, tick, label, pos, v, has_tick;
this.xticks = [];
for (i = 0; i < this.xTicks_.length; i++) {
tick = this.xTicks_[i];
label = tick.label;
has_tick = !('label_v' in tick);
v = has_tick ? tick.v : tick.label_v;
pos = this.dygraph_.toPercentXCoord(v);
if (pos >= 0.0 && pos < 1.0) {
this.xticks.push({
pos: pos,
label: label,
has_tick: has_tick
});
}
}
this.yticks = [];
for (i = 0; i < this.yAxes_.length; i++) {
var axis = this.yAxes_[i];
for (var j = 0; j < axis.ticks.length; j++) {
tick = axis.ticks[j];
label = tick.label;
has_tick = !('label_v' in tick);
v = has_tick ? tick.v : tick.label_v;
pos = this.dygraph_.toPercentYCoord(v, i);
if (pos > 0.0 && pos <= 1.0) {
this.yticks.push({
axis: i,
pos: pos,
label: label,
has_tick: has_tick
});
}
}
}
};
DygraphLayout.prototype._evaluateAnnotations = function () {
// Add the annotations to the point to which they belong.
// Make a map from (setName, xval) to annotation for quick lookups.
var i;
var annotations = {};
for (i = 0; i < this.annotations.length; i++) {
var a = this.annotations[i];
annotations[a.xval + "," + a.series] = a;
}
this.annotated_points = [];
// Exit the function early if there are no annotations.
if (!this.annotations || !this.annotations.length) {
return;
}
// TODO(antrob): loop through annotations not points.
for (var setIdx = 0; setIdx < this.points.length; setIdx++) {
var points = this.points[setIdx];
for (i = 0; i < points.length; i++) {
var p = points[i];
var k = p.xval + "," + p.name;
if (k in annotations) {
p.annotation = annotations[k];
this.annotated_points.push(p);
//if there are multiple same x-valued points, the annotation would be rendered multiple times
//remove already rendered annotation
delete annotations[k];
}
}
}
};
/**
* Convenience function to remove all the data sets from a graph
*/
DygraphLayout.prototype.removeAllDatasets = function () {
delete this.points;
delete this.setNames;
delete this.setPointsLengths;
delete this.setPointsOffsets;
this.points = [];
this.setNames = [];
this.setPointsLengths = [];
this.setPointsOffsets = [];
};
var _default = exports["default"] = DygraphLayout;
module.exports = exports.default;
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Record pixel coordinates for anything.\n * 2. (oddly) determine anything about the layout of chart elements.\n *\n * The naming is a vestige of Dygraph's original PlotKit roots.\n *\n * @constructor\n */\nvar DygraphLayout = function(dygraph) {\n  this.dygraph_ = dygraph;\n  /**\n   * Array of points for each series.\n   *\n   * [series index][row index in series] = |Point| structure,\n   * where series index refers to visible series only, and the\n   * point index is for the reduced set of points for the current\n   * zoom region (including one point just outside the window).\n   * All points in the same row index share the same X value.\n   *\n   * @type {Array.<Array.<Dygraph.PointType>>}\n   */\n  this.points = [];\n  this.setNames = [];\n  this.annotations = [];\n  this.yAxes_ = null;\n\n  // TODO(danvk): it's odd that xTicks_ and yTicks_ are inputs,\n  // but xticks and yticks are outputs. Clean this up.\n  this.xTicks_ = null;\n  this.yTicks_ = null;\n};\n\n/**\n * Add points for a single series.\n *\n * @param {string} setname Name of the series.\n * @param {Array.<Dygraph.PointType>} set_xy Points for the series.\n */\nDygraphLayout.prototype.addDataset = function(setname, set_xy) {\n  this.points.push(set_xy);\n  this.setNames.push(setname);\n};\n\n/**\n * Returns the box which the chart should be drawn in. This is the canvas's\n * box, less space needed for the axis and chart labels.\n *\n * @return {{x: number, y: number, w: number, h: number}}\n */\nDygraphLayout.prototype.getPlotArea = function() {\n  return this.area_;\n};\n\n// Compute the box which the chart should be drawn in. This is the canvas's\n// box, less space needed for axis, chart labels, and other plug-ins.\n// NOTE: This should only be called by Dygraph.predraw_().\nDygraphLayout.prototype.computePlotArea = function() {\n  var area = {\n    // TODO(danvk): per-axis setting.\n    x: 0,\n    y: 0\n  };\n\n  area.w = this.dygraph_.width_ - area.x - this.dygraph_.getOption('rightGap');\n  area.h = this.dygraph_.height_;\n\n  // Let plugins reserve space.\n  var e = {\n    chart_div: this.dygraph_.graphDiv,\n    reserveSpaceLeft: function(px) {\n      var r = {\n        x: area.x,\n        y: area.y,\n        w: px,\n        h: area.h\n      };\n      area.x += px;\n      area.w -= px;\n      return r;\n    },\n    reserveSpaceRight: function(px) {\n      var r = {\n        x: area.x + area.w - px,\n        y: area.y,\n        w: px,\n        h: area.h\n      };\n      area.w -= px;\n      return r;\n    },\n    reserveSpaceTop: function(px) {\n      var r = {\n        x: area.x,\n        y: area.y,\n        w: area.w,\n        h: px\n      };\n      area.y += px;\n      area.h -= px;\n      return r;\n    },\n    reserveSpaceBottom: function(px) {\n      var r = {\n        x: area.x,\n        y: area.y + area.h - px,\n        w: area.w,\n        h: px\n      };\n      area.h -= px;\n      return r;\n    },\n    chartRect: function() {\n      return {x:area.x, y:area.y, w:area.w, h:area.h};\n    }\n  };\n  this.dygraph_.cascadeEvents_('layout', e);\n\n  this.area_ = area;\n};\n\nDygraphLayout.prototype.setAnnotations = function(ann) {\n  // The Dygraph object's annotations aren't parsed. We parse them here and\n  // save a copy. If there is no parser, then the user must be using raw format.\n  this.annotations = [];\n  var parse = this.dygraph_.getOption('xValueParser') || function(x) { return x; };\n  for (var i = 0; i < ann.length; i++) {\n    var a = {};\n    if (!ann[i].xval && ann[i].x === undefined) {\n      console.error(\"Annotations must have an 'x' property\");\n      return;\n    }\n    if (ann[i].icon &&\n        !(ann[i].hasOwnProperty('width') &&\n          ann[i].hasOwnProperty('height'))) {\n      console.error(\"Must set width and height when setting \" +\n                    \"annotation.icon property\");\n      return;\n    }\n    utils.update(a, ann[i]);\n    if (!a.xval) a.xval = parse(a.x);\n    this.annotations.push(a);\n  }\n};\n\nDygraphLayout.prototype.setXTicks = function(xTicks) {\n  this.xTicks_ = xTicks;\n};\n\n// TODO(danvk): add this to the Dygraph object's API or move it into Layout.\nDygraphLayout.prototype.setYAxes = function (yAxes) {\n  this.yAxes_ = yAxes;\n};\n\nDygraphLayout.prototype.evaluate = function() {\n  this._xAxis = {};\n  this._evaluateLimits();\n  this._evaluateLineCharts();\n  this._evaluateLineTicks();\n  this._evaluateAnnotations();\n};\n\nDygraphLayout.prototype._evaluateLimits = function() {\n  var xlimits = this.dygraph_.xAxisRange();\n  this._xAxis.minval = xlimits[0];\n  this._xAxis.maxval = xlimits[1];\n  var xrange = xlimits[1] - xlimits[0];\n  this._xAxis.scale = (xrange !== 0 ? 1 / xrange : 1.0);\n\n  if (this.dygraph_.getOptionForAxis(\"logscale\", 'x')) {\n    this._xAxis.xlogrange = utils.log10(this._xAxis.maxval) - utils.log10(this._xAxis.minval);\n    this._xAxis.xlogscale = (this._xAxis.xlogrange !== 0 ? 1.0 / this._xAxis.xlogrange : 1.0);\n  }\n  for (var i = 0; i < this.yAxes_.length; i++) {\n    var axis = this.yAxes_[i];\n    axis.minyval = axis.computedValueRange[0];\n    axis.maxyval = axis.computedValueRange[1];\n    axis.yrange = axis.maxyval - axis.minyval;\n    axis.yscale = (axis.yrange !== 0 ? 1.0 / axis.yrange : 1.0);\n\n    if (this.dygraph_.getOption(\"logscale\") || axis.logscale) {\n      axis.ylogrange = utils.log10(axis.maxyval) - utils.log10(axis.minyval);\n      axis.ylogscale = (axis.ylogrange !== 0 ? 1.0 / axis.ylogrange : 1.0);\n      if (!isFinite(axis.ylogrange) || isNaN(axis.ylogrange)) {\n        console.error('axis ' + i + ' of graph at ' + axis.g +\n                      ' can\\'t be displayed in log scale for range [' +\n                      axis.minyval + ' - ' + axis.maxyval + ']');\n      }\n    }\n  }\n};\n\nDygraphLayout.calcXNormal_ = function(value, xAxis, logscale) {\n  if (logscale) {\n    return ((utils.log10(value) - utils.log10(xAxis.minval)) * xAxis.xlogscale);\n  } else {\n    return (value - xAxis.minval) * xAxis.scale;\n  }\n};\n\n/**\n * @param {DygraphAxisType} axis\n * @param {number} value\n * @param {boolean} logscale\n * @return {number}\n */\nDygraphLayout.calcYNormal_ = function(axis, value, logscale) {\n  if (logscale) {\n    var x = 1.0 - ((utils.log10(value) - utils.log10(axis.minyval)) * axis.ylogscale);\n    return isFinite(x) ? x : NaN;  // shim for v8 issue; see pull request 276\n  } else {\n    return 1.0 - ((value - axis.minyval) * axis.yscale);\n  }\n};\n\nDygraphLayout.prototype._evaluateLineCharts = function() {\n  var isStacked = this.dygraph_.getOption(\"stackedGraph\");\n  var isLogscaleForX = this.dygraph_.getOptionForAxis(\"logscale\", 'x');\n\n  for (var setIdx = 0; setIdx < this.points.length; setIdx++) {\n    var points = this.points[setIdx];\n    var setName = this.setNames[setIdx];\n    var connectSeparated = this.dygraph_.getOption('connectSeparatedPoints', setName);\n    var axis = this.dygraph_.axisPropertiesForSeries(setName);\n    // TODO (konigsberg): use optionsForAxis instead.\n    var logscale = this.dygraph_.attributes_.getForSeries(\"logscale\", setName);\n    var outOfXBounds = 0, outOfYBounds = 0;\n\n    for (var j = 0; j < points.length; j++) {\n      var point = points[j];\n\n      // Range from 0-1 where 0 represents left and 1 represents right.\n      point.x = DygraphLayout.calcXNormal_(point.xval, this._xAxis, isLogscaleForX);\n      outOfXBounds += (point.x < 0) || (point.x > 1);\n      // Range from 0-1 where 0 represents top and 1 represents bottom\n      var yval = point.yval;\n      if (isStacked) {\n        point.y_stacked = DygraphLayout.calcYNormal_(\n            axis, point.yval_stacked, logscale);\n        if (yval !== null && !isNaN(yval)) {\n          yval = point.yval_stacked;\n        }\n      }\n      if (yval === null) {\n        yval = NaN;\n        if (!connectSeparated) {\n          point.yval = NaN;\n        }\n      }\n      point.y = DygraphLayout.calcYNormal_(axis, yval, logscale);\n      outOfYBounds += (point.y < 0) || (point.y > 1);\n    }\n\n    if (outOfXBounds > 2) {\n      console.warn(outOfXBounds + ' points out of X bounds:' + this._xAxis.minval + ' - ' + this._xAxis.maxval);\n    }\n    if (outOfYBounds > 0) {\n      console.warn(outOfYBounds + ' points out of Y bounds:' + axis.minyval + ' - ' + axis.maxyval);\n    }\n\n    this.dygraph_.dataHandler_.onLineEvaluated(points, axis, logscale);\n  }\n};\n\nDygraphLayout.prototype._evaluateLineTicks = function() {\n  var i, tick, label, pos, v, has_tick;\n  this.xticks = [];\n  for (i = 0; i < this.xTicks_.length; i++) {\n    tick = this.xTicks_[i];\n    label = tick.label;\n    has_tick = !('label_v' in tick);\n    v = has_tick ? tick.v : tick.label_v;\n    pos = this.dygraph_.toPercentXCoord(v);\n    if ((pos >= 0.0) && (pos < 1.0)) {\n      this.xticks.push({pos, label, has_tick});\n    }\n  }\n\n  this.yticks = [];\n  for (i = 0; i < this.yAxes_.length; i++ ) {\n    var axis = this.yAxes_[i];\n    for (var j = 0; j < axis.ticks.length; j++) {\n      tick = axis.ticks[j];\n      label = tick.label;\n      has_tick = !('label_v' in tick);\n      v = has_tick ? tick.v : tick.label_v;\n      pos = this.dygraph_.toPercentYCoord(v, i);\n      if ((pos > 0.0) && (pos <= 1.0)) {\n        this.yticks.push({axis: i, pos, label, has_tick});\n      }\n    }\n  }\n};\n\nDygraphLayout.prototype._evaluateAnnotations = function() {\n  // Add the annotations to the point to which they belong.\n  // Make a map from (setName, xval) to annotation for quick lookups.\n  var i;\n  var annotations = {};\n  for (i = 0; i < this.annotations.length; i++) {\n    var a = this.annotations[i];\n    annotations[a.xval + \",\" + a.series] = a;\n  }\n\n  this.annotated_points = [];\n\n  // Exit the function early if there are no annotations.\n  if (!this.annotations || !this.annotations.length) {\n    return;\n  }\n\n  // TODO(antrob): loop through annotations not points.\n  for (var setIdx = 0; setIdx < this.points.length; setIdx++) {\n    var points = this.points[setIdx];\n    for (i = 0; i < points.length; i++) {\n      var p = points[i];\n      var k = p.xval + \",\" + p.name;\n      if (k in annotations) {\n        p.annotation = annotations[k];\n        this.annotated_points.push(p);\n        //if there are multiple same x-valued points, the annotation would be rendered multiple times\n        //remove already rendered annotation\n        delete annotations[k];\n      }\n    }\n  }\n};\n\n/**\n * Convenience function to remove all the data sets from a graph\n */\nDygraphLayout.prototype.removeAllDatasets = function() {\n  delete this.points;\n  delete this.setNames;\n  delete this.setPointsLengths;\n  delete this.setPointsOffsets;\n  this.points = [];\n  this.setNames = [];\n  this.setPointsLengths = [];\n  this.setPointsOffsets = [];\n};\n\nexport default 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