kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
276 lines (268 loc) • 33.5 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _utils = require("@kepler.gl/utils");
var _iterableTileSet = _interopRequireDefault(require("./iterable-tile-set"));
var _tileUtils = require("./tile-utils");
function _createForOfIteratorHelper(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (!t) { if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var _n = 0, F = function F() {}; return { s: F, n: function n() { return _n >= r.length ? { done: !0 } : { done: !1, value: r[_n++] }; }, e: function e(r) { throw r; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var o, a = !0, u = !1; return { s: function s() { t = t.call(r); }, n: function n() { var r = t.next(); return a = r.done, r; }, e: function e(r) { u = !0, o = r; }, f: function f() { try { a || null == t["return"] || t["return"](); } finally { if (u) throw o; } } }; }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; } // SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project
/**
* Per-tile stats, for caching
*/
/**
* Stateful class offering dataset-style functions for the set of tiles.
*/
var TileDataset = exports["default"] = /*#__PURE__*/function () {
function TileDataset(accessors, tiles) {
(0, _classCallCheck2["default"])(this, TileDataset);
(0, _defineProperty2["default"])(this, "accessors", void 0);
(0, _defineProperty2["default"])(this, "tiles", void 0);
(0, _defineProperty2["default"])(this, "tileSet", void 0);
(0, _defineProperty2["default"])(this, "tileIds", new Set());
/** Cache for per-tile field stats: tileId -> fieldId -> stats */
(0, _defineProperty2["default"])(this, "tileStats", new Map());
this.accessors = accessors;
this.tiles = [];
this.tileSet = new _iterableTileSet["default"]([], accessors.getRowCount);
if (tiles) {
this.updateTiles(tiles);
}
}
/**
* Invalidate the cached data
*/
return (0, _createClass2["default"])(TileDataset, [{
key: "invalidateCache",
value: function invalidateCache() {
// TODO: implement later
}
/**
* Update the set of tiles in the viewport
*/
}, {
key: "updateTiles",
value: function updateTiles(tiles) {
var _this$accessors = this.accessors,
getTileId = _this$accessors.getTileId,
getIterable = _this$accessors.getIterable,
getRowCount = _this$accessors.getRowCount;
var tileIds = new Set(tiles.map(getTileId));
if (!areEqualSets(tileIds, this.tileIds)) {
this.invalidateCache();
}
this.tiles = tiles;
this.tileIds = tileIds;
this.tileSet = new _iterableTileSet["default"](tiles.map(getIterable), getRowCount);
}
/**
* Return current tiles
*/
}, {
key: "getTiles",
value: function getTiles() {
return this.tiles;
}
/**
* Get the min/max domain of a field
*/
}, {
key: "getExtent",
value: function getExtent(field) {
var _this$accessors2 = this.accessors,
getRowValue = _this$accessors2.getRowValue,
getIterable = _this$accessors2.getIterable;
var accessor = getRowValue(field);
var min = Infinity;
var max = -Infinity;
var _iterator = _createForOfIteratorHelper(this.tiles),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var tile = _step.value;
// Check the cache
var extent = this.getTileStat(tile, field, 'extent');
if (!extent) {
// Cache miss, calculate and cache
extent = getTileExtent(getIterable(tile), field, accessor);
this.setTileStat(tile, field, 'extent', extent);
}
if (extent) {
if (extent[0] < min) min = extent[0];
if (extent[1] > max) max = extent[1];
}
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
return Number.isFinite(min) && Number.isFinite(max) ? [min, max] : [0, 0];
}
/**
* Get a sample of field values to use in estimating quantiles
*/
}, {
key: "getQuantileSample",
value: function getQuantileSample(field) {
var minRowCount = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1000;
// TODO: There should be reasonable per-tile caching possible here
var set = this.tileSet;
var accessor = this.accessors.getRowValue(field);
var sample = [];
var sampleStep = Math.max(Math.floor(set.rowCount / minRowCount), 1);
var i = 0;
var _iterator2 = _createForOfIteratorHelper(set),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
var _row = _step2.value;
if (++i === sampleStep) {
var val = accessor(field, _row);
if (val !== null) sample.push(val);
i = 0;
}
}
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
(0, _utils.quickInsertionSort)(sample);
(0, _tileUtils.pruneQuantiles)(sample);
return sample;
}
/**
* Get a set of unique values for a field
*/
}, {
key: "getUniqueValues",
value: function getUniqueValues(field) {
var _this$accessors3 = this.accessors,
getRowValue = _this$accessors3.getRowValue,
getIterable = _this$accessors3.getIterable;
var accessor = getRowValue(field);
var uniques = new Set();
var _iterator3 = _createForOfIteratorHelper(this.tiles),
_step3;
try {
for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
var _tileUniques;
var tile = _step3.value;
// Check the cache
var tileUniques = this.getTileStat(tile, field, 'uniqueValues');
if (!tileUniques) {
// Cache miss, calculate and cache
tileUniques = getTileUniqueValues(getIterable(tile), field, accessor);
this.setTileStat(tile, field, 'uniqueValues', tileUniques);
}
var _iterator4 = _createForOfIteratorHelper((_tileUniques = tileUniques) !== null && _tileUniques !== void 0 ? _tileUniques : []),
_step4;
try {
for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
var val = _step4.value;
uniques.add(val);
}
} catch (err) {
_iterator4.e(err);
} finally {
_iterator4.f();
}
}
} catch (err) {
_iterator3.e(err);
} finally {
_iterator3.f();
}
return (0, _toConsumableArray2["default"])(uniques);
}
}, {
key: "getTileStat",
value: function getTileStat(tile, field, stat) {
var _this$tileStats$get;
return (_this$tileStats$get = this.tileStats.get(this.accessors.getTileId(tile))) === null || _this$tileStats$get === void 0 || (_this$tileStats$get = _this$tileStats$get.get(field.name)) === null || _this$tileStats$get === void 0 ? void 0 : _this$tileStats$get[stat];
}
}, {
key: "setTileStat",
value: function setTileStat(tile, field, stat, value) {
var _this$tileStats$get2, _tileStats$get;
var tileId = this.accessors.getTileId(tile);
var tileStats = (_this$tileStats$get2 = this.tileStats.get(tileId)) !== null && _this$tileStats$get2 !== void 0 ? _this$tileStats$get2 : new Map();
var tileFieldStats = (_tileStats$get = tileStats.get(field.name)) !== null && _tileStats$get !== void 0 ? _tileStats$get : {};
tileFieldStats[stat] = value;
tileStats.set(field.name, tileFieldStats);
this.tileStats.set(tileId, tileStats);
}
}]);
}();
/**
* Get the min/max domain of a field in a given tile
*/
function getTileExtent(iterable, field, accessor) {
var min = Infinity;
var max = -Infinity;
var _iterator5 = _createForOfIteratorHelper(iterable),
_step5;
try {
for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {
var _row2 = _step5.value;
var val = accessor(field, _row2);
if (val === null) continue;
if (val < min) min = val;
if (val > max) max = val;
}
} catch (err) {
_iterator5.e(err);
} finally {
_iterator5.f();
}
return Number.isFinite(min) && Number.isFinite(max) ? [min, max] : undefined;
}
/**
* Get unique values for a field in a given tile
*/
function getTileUniqueValues(iterable, field, accessor) {
var maxUniques = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 20;
var uniques = new Set();
var _iterator6 = _createForOfIteratorHelper(iterable),
_step6;
try {
for (_iterator6.s(); !(_step6 = _iterator6.n()).done;) {
var _row3 = _step6.value;
if (uniques.size >= maxUniques) return uniques;
uniques.add(accessor(field, _row3));
}
} catch (err) {
_iterator6.e(err);
} finally {
_iterator6.f();
}
return uniques;
}
function areEqualSets(a, b) {
if (a.size !== b.size) return false;
var _iterator7 = _createForOfIteratorHelper(a),
_step7;
try {
for (_iterator7.s(); !(_step7 = _iterator7.n()).done;) {
var val = _step7.value;
if (!b.has(val)) {
return false;
}
}
} catch (err) {
_iterator7.e(err);
} finally {
_iterator7.f();
}
return true;
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_utils","require","_iterableTileSet","_interopRequireDefault","_tileUtils","_createForOfIteratorHelper","r","e","t","Symbol","iterator","Array","isArray","_unsupportedIterableToArray","length","_n","F","s","n","done","value","f","TypeError","o","a","u","call","next","_arrayLikeToArray","toString","slice","constructor","name","from","test","TileDataset","exports","accessors","tiles","_classCallCheck2","_defineProperty2","Set","Map","tileSet","IterableTileSet","getRowCount","updateTiles","_createClass2","key","invalidateCache","_this$accessors","getTileId","getIterable","tileIds","map","areEqualSets","getTiles","getExtent","field","_this$accessors2","getRowValue","accessor","min","Infinity","max","_iterator","_step","tile","extent","getTileStat","getTileExtent","setTileStat","err","Number","isFinite","getQuantileSample","minRowCount","arguments","undefined","set","sample","sampleStep","Math","floor","rowCount","i","_iterator2","_step2","row","val","push","quickInsertionSort","pruneQuantiles","getUniqueValues","_this$accessors3","uniques","_iterator3","_step3","_tileUniques","tileUniques","getTileUniqueValues","_iterator4","_step4","add","_toConsumableArray2","stat","_this$tileStats$get","tileStats","get","_this$tileStats$get2","_tileStats$get","tileId","tileFieldStats","iterable","_iterator5","_step5","maxUniques","_iterator6","_step6","size","b","_iterator7","_step7","has"],"sources":["../../../src/vector-tile/common-tile/tile-dataset.ts"],"sourcesContent":["// SPDX-License-Identifier: MIT\n// Copyright contributors to the kepler.gl project\n\nimport {Field as KeplerField} from '@kepler.gl/types';\nimport {quickInsertionSort} from '@kepler.gl/utils';\n\nimport IterableTileSet, {RowCountAccessor} from './iterable-tile-set';\nimport {pruneQuantiles} from './tile-utils';\n\nexport type Datum = number | string | null;\n\ntype RowValueAccessor<T> = (\n  field: KeplerField,\n  row: T extends Iterable<infer V> ? V : never\n) => Datum;\ntype RowValueAccessorFactory<T> = (\n  field?: KeplerField,\n  indexKey?: number | null\n) => RowValueAccessor<T>;\n\ntype TileAccessors<T, I extends Iterable<any> = T extends Iterable<any> ? T : never> = {\n  getTileId: (tile: T) => string;\n  getIterable: (tile: T) => I;\n  getRowCount: RowCountAccessor<I>;\n  getRowValue: RowValueAccessorFactory<I>;\n};\n\n/**\n * Per-tile stats, for caching\n */\ntype TileFieldStats = {\n  extent?: [number, number];\n  sample?: Datum[];\n  uniqueValues?: Set<Datum>;\n};\n\n/**\n * Stateful class offering dataset-style functions for the set of tiles.\n */\nexport default class TileDataset<T, I extends Iterable<any> = T extends Iterable<any> ? T : never> {\n  private accessors: TileAccessors<T, I>;\n  private tiles: readonly T[];\n  private tileSet: IterableTileSet<I>;\n  private tileIds: Set<string> = new Set();\n\n  /** Cache for per-tile field stats: tileId -> fieldId -> stats */\n  private tileStats: Map<string, Map<string, TileFieldStats>> = new Map();\n\n  constructor(accessors: TileAccessors<T, I>, tiles?: readonly T[]) {\n    this.accessors = accessors;\n    this.tiles = [];\n    this.tileSet = new IterableTileSet([], accessors.getRowCount);\n    if (tiles) {\n      this.updateTiles(tiles);\n    }\n  }\n\n  /**\n   * Invalidate the cached data\n   */\n  invalidateCache(): void {\n    // TODO: implement later\n  }\n\n  /**\n   * Update the set of tiles in the viewport\n   */\n  updateTiles(tiles: readonly T[]): void {\n    const {getTileId, getIterable, getRowCount} = this.accessors;\n    const tileIds = new Set<string>(tiles.map(getTileId));\n    if (!areEqualSets(tileIds, this.tileIds)) {\n      this.invalidateCache();\n    }\n    this.tiles = tiles;\n    this.tileIds = tileIds;\n    this.tileSet = new IterableTileSet(tiles.map(getIterable), getRowCount);\n  }\n\n  /**\n   * Return current tiles\n   */\n  getTiles(): readonly T[] {\n    return this.tiles;\n  }\n\n  /**\n   * Get the min/max domain of a field\n   */\n  getExtent(field: KeplerField): [number, number] {\n    const {getRowValue, getIterable} = this.accessors;\n    const accessor = getRowValue(field);\n    let min = Infinity;\n    let max = -Infinity;\n\n    for (const tile of this.tiles) {\n      // Check the cache\n      let extent = this.getTileStat(tile, field, 'extent');\n      if (!extent) {\n        // Cache miss, calculate and cache\n        extent = getTileExtent(getIterable(tile), field, accessor);\n        this.setTileStat(tile, field, 'extent', extent);\n      }\n      if (extent) {\n        if (extent[0] < min) min = extent[0];\n        if (extent[1] > max) max = extent[1];\n      }\n    }\n    return Number.isFinite(min) && Number.isFinite(max) ? [min, max] : [0, 0];\n  }\n\n  /**\n   * Get a sample of field values to use in estimating quantiles\n   */\n  getQuantileSample(field: KeplerField, minRowCount = 1000): number[] {\n    // TODO: There should be reasonable per-tile caching possible here\n    const set = this.tileSet;\n    const accessor = this.accessors.getRowValue(field);\n    const sample: number[] = [];\n    const sampleStep = Math.max(Math.floor(set.rowCount / minRowCount), 1);\n    let i = 0;\n    for (const row of set) {\n      if (++i === sampleStep) {\n        const val = accessor(field, row) as number | null;\n        if (val !== null) sample.push(val);\n        i = 0;\n      }\n    }\n    quickInsertionSort(sample);\n    pruneQuantiles(sample);\n    return sample;\n  }\n\n  /**\n   * Get a set of unique values for a field\n   */\n  getUniqueValues(field: KeplerField): Datum[] {\n    const {getRowValue, getIterable} = this.accessors;\n    const accessor = getRowValue(field);\n    const uniques = new Set<Datum>();\n\n    for (const tile of this.tiles) {\n      // Check the cache\n      let tileUniques = this.getTileStat(tile, field, 'uniqueValues');\n      if (!tileUniques) {\n        // Cache miss, calculate and cache\n        tileUniques = getTileUniqueValues(getIterable(tile), field, accessor);\n        this.setTileStat(tile, field, 'uniqueValues', tileUniques);\n      }\n      for (const val of tileUniques ?? []) {\n        uniques.add(val);\n      }\n    }\n    return [...uniques];\n  }\n\n  private getTileStat<K extends keyof TileFieldStats>(\n    tile: T,\n    field: KeplerField,\n    stat: K\n  ): TileFieldStats[K] {\n    return this.tileStats.get(this.accessors.getTileId(tile))?.get(field.name)?.[stat];\n  }\n\n  private setTileStat<K extends keyof TileFieldStats>(\n    tile: T,\n    field: KeplerField,\n    stat: K,\n    value: TileFieldStats[K]\n  ): void {\n    const tileId = this.accessors.getTileId(tile);\n    const tileStats = this.tileStats.get(tileId) ?? new Map();\n    const tileFieldStats = tileStats.get(field.name) ?? {};\n    tileFieldStats[stat] = value;\n    tileStats.set(field.name, tileFieldStats);\n    this.tileStats.set(tileId, tileStats);\n  }\n}\n\n/**\n * Get the min/max domain of a field in a given tile\n */\nfunction getTileExtent<I extends Iterable<any>>(\n  iterable: I,\n  field: KeplerField,\n  accessor: RowValueAccessor<I>\n): [number, number] | undefined {\n  let min = Infinity;\n  let max = -Infinity;\n  for (const row of iterable) {\n    const val = accessor(field, row) as number | null;\n    if (val === null) continue;\n    if (val < min) min = val;\n    if (val > max) max = val;\n  }\n  return Number.isFinite(min) && Number.isFinite(max) ? [min, max] : undefined;\n}\n\n/**\n * Get unique values for a field in a given tile\n */\nfunction getTileUniqueValues<I extends Iterable<any>>(\n  iterable: I,\n  field: KeplerField,\n  accessor: RowValueAccessor<I>,\n  maxUniques = 20\n): Set<Datum> {\n  const uniques = new Set<Datum>();\n  for (const row of iterable) {\n    if (uniques.size >= maxUniques) return uniques;\n    uniques.add(accessor(field, row));\n  }\n  return uniques;\n}\n\nfunction areEqualSets(a: Set<string>, b: Set<string>): boolean {\n  if (a.size !== b.size) return false;\n  for (const val of a) {\n    if (!b.has(val)) {\n      return false;\n    }\n  }\n  return 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