kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
303 lines (237 loc) • 29.8 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.unique = unique;
exports.findMapBounds = findMapBounds;
exports.getLatLngBounds = getLatLngBounds;
exports.clamp = clamp;
exports.getSampleData = getSampleData;
exports.timeToUnixMilli = timeToUnixMilli;
exports.maybeToDate = maybeToDate;
exports.notNullorUndefined = notNullorUndefined;
exports.isPlainObject = isPlainObject;
exports.numberSort = numberSort;
exports.getSortingFunction = getSortingFunction;
exports.preciseRound = preciseRound;
exports.getRoundingDecimalFromStep = getRoundingDecimalFromStep;
exports.roundValToStep = roundValToStep;
exports.findFirstNoneEmpty = findFirstNoneEmpty;
exports.arrayMove = exports.parseFieldValue = exports.FIELD_DISPLAY_FORMAT = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _moment = _interopRequireDefault(require("moment"));
var _assert = _interopRequireDefault(require("assert"));
var _defaultSettings = require("../constants/default-settings");
var _FIELD_DISPLAY_FORMAT;
var MAX_LATITUDE = 90;
var MIN_LATITUDE = -90;
var MAX_LONGITUDE = 180;
var MIN_LONGITUDE = -180;
/**
* simple getting unique values of an array
*
* @param {array} values
* @returns {array} unique values
*/
function unique(values) {
var results = [];
values.forEach(function (v) {
if (!results.includes(v) && notNullorUndefined(v)) {
results.push(v);
}
});
return results;
}
/* eslint-disable max-statements */
/**
* return center of map from given points
* @param {array} layers
* @param {string} dataId
* @returns {object} coordinates of map center, empty if not found
*/
function findMapBounds(layers) {
// find bounds in formatted layerData
// take ALL layers into account when finding map bounds
var availableLayerBounds = layers.reduce(function (res, l) {
if (l.meta && l.meta.bounds) {
res.push(l.meta.bounds);
}
return res;
}, []); // return null if no layer is available
if (availableLayerBounds.length === 0) {
return null;
} // merge bounds in each layer
var newBounds = availableLayerBounds.reduce(function (res, b) {
return [Math.min(res[0], b[0]), Math.min(res[1], b[1]), Math.max(res[2], b[2]), Math.max(res[3], b[3])];
}, [MAX_LONGITUDE, MAX_LATITUDE, MIN_LONGITUDE, MIN_LATITUDE]);
return newBounds;
}
/* eslint-enable max-statements */
function getLatLngBounds(points, idx, limit) {
var lats = points.map(function (d) {
return Array.isArray(d) && d[idx];
}).filter(Number.isFinite).sort(numberSort);
if (!lats.length) {
return null;
} // clamp to limit
return [Math.max(lats[0], limit[0]), Math.min(lats[lats.length - 1], limit[1])];
}
function clamp(_ref, val) {
var _ref2 = (0, _slicedToArray2["default"])(_ref, 2),
min = _ref2[0],
max = _ref2[1];
return val <= min ? min : val >= max ? max : val;
}
function getSampleData(data) {
var sampleSize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 500;
var getValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : function (d) {
return d;
};
var sampleStep = Math.max(Math.floor(data.length / sampleSize), 1);
var output = [];
for (var i = 0; i < data.length; i += sampleStep) {
output.push(getValue(data[i]));
}
return output;
}
/**
* Convert different time format to unix milliseconds
* @param {*} value
* @param {*} format
*/
function timeToUnixMilli(value, format) {
if (notNullorUndefined(value)) {
return typeof value === 'string' ? _moment["default"].utc(value, format).valueOf() : format === 'x' ? value * 1000 : value;
}
return null;
}
function maybeToDate(isTime, fieldIdx, format, d) {
if (isTime) {
return timeToUnixMilli(d[fieldIdx], format);
}
return d[fieldIdx];
}
/**
* whether null or undefined
* @returns {boolean} - yes or no
*/
function notNullorUndefined(d) {
return d !== undefined && d !== null;
}
function isPlainObject(obj) {
return obj === Object(obj) && typeof obj !== 'function' && !Array.isArray(obj);
}
function numberSort(a, b) {
return a - b;
}
function getSortingFunction(fieldType) {
switch (fieldType) {
case _defaultSettings.ALL_FIELD_TYPES.real:
case _defaultSettings.ALL_FIELD_TYPES.integer:
case _defaultSettings.ALL_FIELD_TYPES.timestamp:
return numberSort;
default:
return undefined;
}
}
/**
* round number with exact number of decimals
* return as a string
* @param {number} num
* @param {number} decimals
* @returns {string} - a rounded number in string format
*/
function preciseRound(num, decimals) {
var t = Math.pow(10, decimals);
return (Math.round(num * t + (decimals > 0 ? 1 : 0) * (Math.sign(num) * (10 / Math.pow(100, decimals)))) / t).toFixed(decimals);
}
/**
* get number of decimals to round to for slider from step
* @param {number} step
* @returns {number} - number of decimal
*/
function getRoundingDecimalFromStep(step) {
if (isNaN(step)) {
(0, _assert["default"])('step is not a number');
(0, _assert["default"])(step);
}
var splitZero = step.toString().split('.');
if (splitZero.length === 1) {
return 0;
}
return splitZero[1].length;
}
/**
* round the value to step for the slider
* @param {number} minValue
* @param {number} step
* @param {number} val
* @returns {number} - rounded number
*/
function roundValToStep(minValue, step, val) {
if (isNaN(step)) {
return val;
}
var decimal = getRoundingDecimalFromStep(step);
var steps = Math.floor((val - minValue) / step);
var remain = val - (steps * step + minValue); // has to round because javascript turns 0.1 into 0.9999999999999987
remain = Number(preciseRound(remain, 8));
var closest;
if (remain === 0) {
closest = val;
} else if (remain < step / 2) {
closest = steps * step + minValue;
} else {
closest = (steps + 1) * step + minValue;
} // precise round return a string rounded to the defined decimal
var rounded = preciseRound(closest, decimal);
return Number(rounded);
}
var identity = function identity(d) {
return d;
};
var FIELD_DISPLAY_FORMAT = (_FIELD_DISPLAY_FORMAT = {}, (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.string, identity), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.timestamp, identity), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.integer, identity), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.real, identity), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES["boolean"], function (d) {
return String(d);
}), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.date, identity), (0, _defineProperty2["default"])(_FIELD_DISPLAY_FORMAT, _defaultSettings.ALL_FIELD_TYPES.geojson, function (d) {
return typeof d === 'string' ? d : isPlainObject(d) ? JSON.stringify(d) : Array.isArray(d) ? "[".concat(String(d), "]") : '';
}), _FIELD_DISPLAY_FORMAT);
/**
* Parse field value and type and return a string representation
* @param {string} value the field value
* @param {string} type the field type
* @return {*}
*/
exports.FIELD_DISPLAY_FORMAT = FIELD_DISPLAY_FORMAT;
var parseFieldValue = function parseFieldValue(value, type) {
if (!notNullorUndefined(value)) {
return '';
}
return FIELD_DISPLAY_FORMAT[type] ? FIELD_DISPLAY_FORMAT[type](value) : String(value);
};
exports.parseFieldValue = parseFieldValue;
var arrayMoveMutate = function arrayMoveMutate(array, from, to) {
array.splice(to < 0 ? array.length + to : to, 0, array.splice(from, 1)[0]);
};
var arrayMove = function arrayMove(array, from, to) {
array = array.slice();
arrayMoveMutate(array, from, to);
return array;
};
exports.arrayMove = arrayMove;
function findFirstNoneEmpty(data) {
var count = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
var getValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : identity;
var c = 0;
var found = [];
while (c < count && c < data.length) {
var value = getValue(data[c]);
if (notNullorUndefined(value)) {
found.push(value);
}
c++;
}
return found;
}
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Copyright (c) 2020 Uber Technologies, Inc.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a copy\n// of this software and associated documentation files (the \"Software\"), to deal\n// in the Software without restriction, including without limitation the rights\n// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n// copies of the Software, and to permit persons to whom the Software is\n// furnished to do so, subject to the following conditions:\n//\n// The above copyright notice and this permission notice shall be included in\n// all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n// THE SOFTWARE.\n\nimport moment from 'moment';\nimport assert from 'assert';\nimport {ALL_FIELD_TYPES} from 'constants/default-settings';\n\nconst MAX_LATITUDE = 90;\nconst MIN_LATITUDE = -90;\nconst MAX_LONGITUDE = 180;\nconst MIN_LONGITUDE = -180;\n\n/**\n * simple getting unique values of an array\n *\n * @param {array} values\n * @returns {array} unique values\n */\nexport function unique(values) {\n  const results = [];\n  values.forEach(v => {\n    if (!results.includes(v) && notNullorUndefined(v)) {\n      results.push(v);\n    }\n  });\n\n  return results;\n}\n\n/* eslint-disable max-statements */\n/**\n * return center of map from given points\n * @param {array} layers\n * @param {string} dataId\n * @returns {object} coordinates of map center, empty if not found\n */\nexport function findMapBounds(layers) {\n  // find bounds in formatted layerData\n  // take ALL layers into account when finding map bounds\n  const availableLayerBounds = layers.reduce((res, l) => {\n    if (l.meta && l.meta.bounds) {\n      res.push(l.meta.bounds);\n    }\n    return res;\n  }, []);\n  // return null if no layer is available\n  if (availableLayerBounds.length === 0) {\n    return null;\n  }\n  // merge bounds in each layer\n  const newBounds = availableLayerBounds.reduce(\n    (res, b) => {\n      return [\n        Math.min(res[0], b[0]),\n        Math.min(res[1], b[1]),\n        Math.max(res[2], b[2]),\n        Math.max(res[3], b[3])\n      ];\n    },\n    [MAX_LONGITUDE, MAX_LATITUDE, MIN_LONGITUDE, MIN_LATITUDE]\n  );\n  return newBounds;\n}\n/* eslint-enable max-statements */\n\nexport function getLatLngBounds(points, idx, limit) {\n  const lats = points\n    .map(d => Array.isArray(d) && d[idx])\n    .filter(Number.isFinite)\n    .sort(numberSort);\n\n  if (!lats.length) {\n    return null;\n  }\n\n  // clamp to limit\n  return [Math.max(lats[0], limit[0]), Math.min(lats[lats.length - 1], limit[1])];\n}\n\nexport function clamp([min, max], val) {\n  return val <= min ? min : val >= max ? max : val;\n}\n\nexport function getSampleData(data, sampleSize = 500, getValue = d => d) {\n  const sampleStep = Math.max(Math.floor(data.length / sampleSize), 1);\n  const output = [];\n  for (let i = 0; i < data.length; i += sampleStep) {\n    output.push(getValue(data[i]));\n  }\n\n  return output;\n}\n\n/**\n * Convert different time format to unix milliseconds\n * @param {*} value\n * @param {*} format\n */\nexport function timeToUnixMilli(value, format) {\n  if (notNullorUndefined(value)) {\n    return typeof value === 'string'\n      ? moment.utc(value, format).valueOf()\n      : format === 'x'\n      ? value * 1000\n      : value;\n  }\n  return null;\n}\n\nexport function maybeToDate(isTime, fieldIdx, format, d) {\n  if (isTime) {\n    return timeToUnixMilli(d[fieldIdx], format);\n  }\n\n  return d[fieldIdx];\n}\n\n/**\n * whether null or undefined\n * @returns {boolean} - yes or no\n */\nexport function notNullorUndefined(d) {\n  return d !== undefined && d !== null;\n}\n\nexport function isPlainObject(obj) {\n  return obj === Object(obj) && typeof obj !== 'function' && !Array.isArray(obj);\n}\n\nexport function numberSort(a, b) {\n  return a - b;\n}\n\nexport function getSortingFunction(fieldType) {\n  switch (fieldType) {\n    case ALL_FIELD_TYPES.real:\n    case ALL_FIELD_TYPES.integer:\n    case ALL_FIELD_TYPES.timestamp:\n      return numberSort;\n    default:\n      return undefined;\n  }\n}\n\n/**\n * round number with exact number of decimals\n * return as a string\n * @param {number} num\n * @param {number} decimals\n * @returns {string} - a rounded number in string format\n */\nexport function preciseRound(num, decimals) {\n  const t = Math.pow(10, decimals);\n  return (\n    Math.round(\n      num * t + (decimals > 0 ? 1 : 0) * (Math.sign(num) * (10 / Math.pow(100, decimals)))\n    ) / t\n  ).toFixed(decimals);\n}\n\n/**\n * get number of decimals to round to for slider from step\n * @param {number} step\n * @returns {number} - number of decimal\n */\nexport function getRoundingDecimalFromStep(step) {\n  if (isNaN(step)) {\n    assert('step is not a number');\n    assert(step);\n  }\n\n  const splitZero = step.toString().split('.');\n  if (splitZero.length === 1) {\n    return 0;\n  }\n  return splitZero[1].length;\n}\n\n/**\n * round the value to step for the slider\n * @param {number} minValue\n * @param {number} step\n * @param {number} val\n * @returns {number} - rounded number\n */\nexport function roundValToStep(minValue, step, val) {\n  if (isNaN(step)) {\n    return val;\n  }\n\n  const decimal = getRoundingDecimalFromStep(step);\n  const steps = Math.floor((val - minValue) / step);\n  let remain = val - (steps * step + minValue);\n\n  // has to round because javascript turns 0.1 into 0.9999999999999987\n  remain = Number(preciseRound(remain, 8));\n\n  let closest;\n  if (remain === 0) {\n    closest = val;\n  } else if (remain < step / 2) {\n    closest = steps * step + minValue;\n  } else {\n    closest = (steps + 1) * step + minValue;\n  }\n\n  // precise round return a string rounded to the defined decimal\n  const rounded = preciseRound(closest, decimal);\n\n  return Number(rounded);\n}\n\nconst identity = d => d;\n\nexport const FIELD_DISPLAY_FORMAT = {\n  [ALL_FIELD_TYPES.string]: identity,\n  [ALL_FIELD_TYPES.timestamp]: identity,\n  [ALL_FIELD_TYPES.integer]: identity,\n  [ALL_FIELD_TYPES.real]: identity,\n  [ALL_FIELD_TYPES.boolean]: d => String(d),\n  [ALL_FIELD_TYPES.date]: identity,\n  [ALL_FIELD_TYPES.geojson]: d =>\n    typeof d === 'string'\n      ? 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