@findify/react-components/lib/components/common/Image/index.js

Findify react UI components

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

/**
 * @module components/common/Image
 */
import React, { useRef, useState, useEffect, useMemo } from 'react';
import cx from 'classnames';
import { jsx as _jsx } from "react/jsx-runtime";
var styles = {
  "root": "findify-components-common--image",
  "next": "findify-components-common--image__next",
  "aspect": "findify-components-common--image__aspect",
  "image": "findify-components-common--image__image",
  "multiple": "findify-components-common--image__multiple",
  "thumbnail": "findify-components-common--image__thumbnail",
  "ready": "findify-components-common--image__ready",
  "static": "findify-components-common--image__static"
};
var LazyStrategy;

(function (LazyStrategy) {
  LazyStrategy[LazyStrategy["native"] = 0] = "native";
  LazyStrategy[LazyStrategy["observer"] = 1] = "observer";
  LazyStrategy[LazyStrategy["none"] = 2] = "none";
})(LazyStrategy || (LazyStrategy = {}));

var lazyStrategy = function () {
  if ('loading' in HTMLImageElement.prototype) return LazyStrategy.native;
  if ('IntersectionObserver' in global) return LazyStrategy.observer;
  return LazyStrategy.none;
}();

var useViewPort = function useViewPort() {
  var lazyOffset = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 200;

  var _useState = useState(false),
      _useState2 = _slicedToArray(_useState, 2),
      ready = _useState2[0],
      setReady = _useState2[1];

  var element = useRef(null);
  useEffect(function () {
    if (!element.current || ready) return;

    var handleIntersect = function handleIntersect(entries, observer) {
      if (!element.current) return;
      entries.forEach(function (entry) {
        if (entry.isIntersecting) {
          setReady(true);
          observer.unobserve(entry.target);
        }
      });
    };

    var observer = new IntersectionObserver(handleIntersect, {
      root: null,
      rootMargin: "".concat(lazyOffset, "px"),
      threshold: 0
    });
    observer.observe(element.current);
    return function () {
      return observer && observer.unobserve(element.current);
    };
  }, [element]);
  return {
    ready: ready,
    element: element
  };
};

var getSource = function getSource(src, fx) {
  return useMemo(function () {
    var _window;

    var res = fx && fx(src, (_window = window) === null || _window === void 0 ? void 0 : _window.innerWidth) || src;
    if (!res) return [];
    return (typeof res === 'string' ? [res] : res).filter(function (value, index, self) {
      return value && self.indexOf(value) === index;
    });
  }, [src]);
};

var ImageView = function ImageView(_ref) {
  var lazy = _ref.lazy,
      src = _ref.src,
      alt = _ref.alt,
      aspectRatio = _ref.aspectRatio,
      register = _ref.register,
      _ref$isReady = _ref.isReady,
      isReady = _ref$isReady === void 0 ? true : _ref$isReady;
  var aspect = aspectRatio > 0;

  var _src = Array.isArray(src) ? src : [src];

  return /*#__PURE__*/_jsx("div", {
    ref: register,
    style: {
      paddingBottom: aspect ? "".concat(aspectRatio * 100, "%") : 'auto'
    },
    className: cx(styles.root, aspect && styles.aspect || styles.static, _src.length > 1 && styles.multiple),
    children: _src.map(function (src, index) {
      return isReady ? /*#__PURE__*/_jsx("img", {
        src: src,
        alt: alt,
        decode: "async",
        loading: lazy ? 'lazy' : undefined,
        className: cx(styles.image, index && styles.next)
      }, src) : null;
    })
  });
};

export default (function (_ref2) {
  var lazy = _ref2.lazy,
      getSrc = _ref2.getSrc,
      src = _ref2.src,
      lazyOffset = _ref2.lazyOffset,
      props = _objectWithoutProperties(_ref2, ["lazy", "getSrc", "src", "lazyOffset"]);

  var _src = getSource(src, getSrc);

  if (lazyStrategy === LazyStrategy.native || lazyStrategy === LazyStrategy.none || !lazy) {
    return /*#__PURE__*/_jsx(ImageView, _objectSpread({
      src: _src,
      lazy: lazy && lazyStrategy === LazyStrategy.native
    }, props));
  }

  var _useViewPort = useViewPort(lazyOffset),
      ready = _useViewPort.ready,
      element = _useViewPort.element;

  return /*#__PURE__*/_jsx(ImageView, _objectSpread({
    src: _src,
    lazy: true,
    register: element,
    isReady: ready
  }, props));
});