kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
136 lines (133 loc) • 18.1 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
exports.observeDimensions = observeDimensions;
exports.unobserveDimensions = unobserveDimensions;
exports.useDimensions = useDimensions;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _lodash = _interopRequireDefault(require("lodash.throttle"));
var _react = require("react");
var _resizeObserverPolyfill = _interopRequireDefault(require("resize-observer-polyfill"));
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$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; } // SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project
var DEFAULT_THROTTLE_DELAY = 100;
// Using a single ResizeObserver for all elements can be 10x
// more performant than using a separate ResizeObserver per element
// https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/z6ienONUb5A/F5-VcUZtBAAJ
var _observerRegistry;
function getObserverRegistry() {
if (_observerRegistry === undefined) {
var callbacks = new Map();
var resizeObserver = new _resizeObserverPolyfill["default"](function (entries, observer) {
var _iterator = _createForOfIteratorHelper(entries),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var _callbacks$get;
var entry = _step.value;
(_callbacks$get = callbacks.get(entry.target)) === null || _callbacks$get === void 0 || _callbacks$get(entry, observer);
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
});
_observerRegistry = {
subscribe: function subscribe(target, callback) {
if (target instanceof Element) {
resizeObserver.observe(target);
callbacks.set(target, callback);
}
},
unsubscribe: function unsubscribe(target) {
if (target instanceof Element) {
resizeObserver.unobserve(target);
callbacks["delete"](target);
}
}
};
}
return _observerRegistry;
}
function observeDimensions(target, handleResize) {
var throttleDelay = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : DEFAULT_THROTTLE_DELAY;
var registry = getObserverRegistry();
var handler = throttleDelay > 0 ? (0, _lodash["default"])(handleResize, throttleDelay) : handleResize;
registry.subscribe(target, function (entry) {
return handler(getSize(target, entry));
});
}
function unobserveDimensions(target) {
var registry = getObserverRegistry();
registry.unsubscribe(target);
}
function getSize(node, entry) {
if (entry.contentRect) {
var _entry$contentRect = entry.contentRect,
width = _entry$contentRect.width,
height = _entry$contentRect.height;
return {
width: width,
height: height
};
}
if (node.getBoundingClientRect) {
var _node$getBoundingClie = node.getBoundingClientRect(),
_width = _node$getBoundingClie.width,
_height = _node$getBoundingClie.height;
return {
width: _width,
height: _height
};
}
return null;
}
/**
* Usage example:
* const [ref, dimensions] = useDimensions<HTMLDivElement>();
*
* @param throttleDelay
* @returns
*/
function useDimensions(nodeRef) {
var _ref2;
var throttleDelay = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THROTTLE_DELAY;
var ref = (0, _react.useRef)(null);
if (nodeRef) {
ref = nodeRef;
}
var _useState = (0, _react.useState)(null),
_useState2 = (0, _slicedToArray2["default"])(_useState, 2),
size = _useState2[0],
setSize = _useState2[1];
(0, _react.useEffect)(function () {
var _ref = ref || {},
current = _ref.current;
if (!current) {
return;
}
var didUnobserve = false;
observeDimensions(current, function (entry) {
if (didUnobserve) return;
var newSize = getSize(current, entry);
if (newSize) {
// @ts-ignore
setSize(newSize);
}
}, throttleDelay);
return function () {
didUnobserve = true;
unobserveDimensions(current);
};
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [throttleDelay, (_ref2 = ref) === null || _ref2 === void 0 ? void 0 : _ref2.current]);
return [ref, size];
}
var _default = exports["default"] = useDimensions;
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SPDX-License-Identifier: MIT\n// Copyright contributors to the kepler.gl project\n\nimport throttle from 'lodash.throttle';\nimport {useEffect, useRef, useState, RefObject} from 'react';\nimport ResizeObserver from 'resize-observer-polyfill';\n\nexport interface Dimensions {\n  readonly height: number;\n  readonly width: number;\n}\n\nconst DEFAULT_THROTTLE_DELAY = 100;\n\n// Using a single ResizeObserver for all elements can be 10x\n// more performant than using a separate ResizeObserver per element\n// https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/z6ienONUb5A/F5-VcUZtBAAJ\nlet _observerRegistry;\n\nfunction getObserverRegistry() {\n  if (_observerRegistry === undefined) {\n    const callbacks = new Map();\n    const resizeObserver = new ResizeObserver((entries, observer) => {\n      for (const entry of entries) {\n        callbacks.get(entry.target)?.(entry, observer);\n      }\n    });\n    _observerRegistry = {\n      subscribe(target, callback) {\n        if (target instanceof Element) {\n          resizeObserver.observe(target);\n          callbacks.set(target, callback);\n        }\n      },\n      unsubscribe(target) {\n        if (target instanceof Element) {\n          resizeObserver.unobserve(target);\n          callbacks.delete(target);\n        }\n      }\n    };\n  }\n  return _observerRegistry;\n}\n\nexport function observeDimensions(\n  target: Element,\n  handleResize: (size: Dimensions | null) => void,\n  throttleDelay = DEFAULT_THROTTLE_DELAY\n) {\n  const registry = getObserverRegistry();\n  const handler = throttleDelay > 0 ? throttle(handleResize, throttleDelay) : handleResize;\n  registry.subscribe(target, entry => handler(getSize(target, entry)));\n}\n\nexport function unobserveDimensions(target: Element) {\n  const registry = getObserverRegistry();\n  registry.unsubscribe(target);\n}\n\nfunction getSize(node, entry): Dimensions | null {\n  if (entry.contentRect) {\n    const {width, height} = entry.contentRect;\n    return {width, height};\n  }\n  if (node.getBoundingClientRect) {\n    const {width, height} = node.getBoundingClientRect();\n    return {width, height};\n  }\n  return null;\n}\n\n/**\n * Usage example:\n * const [ref, dimensions] = useDimensions<HTMLDivElement>();\n *\n * @param throttleDelay\n * @returns\n */\nexport function useDimensions<T extends Element>(\n  nodeRef?: RefObject<T>,\n  throttleDelay = DEFAULT_THROTTLE_DELAY\n): [RefObject<T>, Dimensions | null] {\n  let ref = useRef<T>(null);\n  if (nodeRef) {\n    ref = nodeRef;\n  }\n  const [size, setSize] = useState(null);\n\n  useEffect(() => {\n    const {current} = ref || {};\n    if (!current) {\n      return;\n    }\n\n    let didUnobserve = false;\n    observeDimensions(\n      current,\n      entry => {\n        if (didUnobserve) return;\n        const newSize = getSize(current, entry);\n        if (newSize) {\n          // @ts-ignore\n          setSize(newSize);\n        }\n      },\n      throttleDelay\n    );\n    return () => {\n      didUnobserve = true;\n      unobserveDimensions(current);\n    };\n    // eslint-disable-next-line react-hooks/exhaustive-deps\n  }, [throttleDelay, ref?.current]);\n\n  return [ref as RefObject<T>, size];\n}\n\nexport default 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