react-inner-image-zoom/lib/InnerImageZoom.js

A React component for magnifying an image within its parent container 🔎

"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _react = _interopRequireWildcard(require("react"));
var _Image = _interopRequireDefault(require("./components/Image"));
var _ZoomImage = _interopRequireDefault(require("./components/ZoomImage"));
var _FullscreenPortal = _interopRequireDefault(require("./components/FullscreenPortal"));
var _images = require("inner-image-zoom/src/utils/images");
var _events = require("inner-image-zoom/src/utils/events");
var _this = void 0;
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); 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 = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
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$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0); } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i.return && (_r = _i.return(), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
var InnerImageZoom = /*#__PURE__*/(0, _react.forwardRef)(function (_ref, ref) {
  var _ref$moveType = _ref.moveType,
    moveType = _ref$moveType === void 0 ? 'pan' : _ref$moveType,
    _ref$zoomType = _ref.zoomType,
    zoomType = _ref$zoomType === void 0 ? 'click' : _ref$zoomType,
    src = _ref.src,
    sources = _ref.sources,
    width = _ref.width,
    height = _ref.height,
    hasSpacer = _ref.hasSpacer,
    _ref$imgAttributes = _ref.imgAttributes,
    imgAttributes = _ref$imgAttributes === void 0 ? {} : _ref$imgAttributes,
    zoomSrc = _ref.zoomSrc,
    _ref$zoomScale = _ref.zoomScale,
    zoomScale = _ref$zoomScale === void 0 ? 1 : _ref$zoomScale,
    zoomPreload = _ref.zoomPreload,
    _ref$fadeDuration = _ref.fadeDuration,
    fadeDuration = _ref$fadeDuration === void 0 ? 150 : _ref$fadeDuration,
    fullscreenOnMobile = _ref.fullscreenOnMobile,
    _ref$mobileBreakpoint = _ref.mobileBreakpoint,
    mobileBreakpoint = _ref$mobileBreakpoint === void 0 ? 640 : _ref$mobileBreakpoint,
    hideCloseButton = _ref.hideCloseButton,
    hideHint = _ref.hideHint,
    className = _ref.className,
    afterZoomIn = _ref.afterZoomIn,
    afterZoomOut = _ref.afterZoomOut;
  var container = (0, _react.useRef)(null);
  var zoomImg = (0, _react.useRef)(null);
  var portal = (0, _react.useRef)(null);
  var imgProps = (0, _react.useRef)({});
  var _useState = (0, _react.useState)(zoomPreload),
    _useState2 = _slicedToArray(_useState, 2),
    isActive = _useState2[0],
    setIsActive = _useState2[1];
  var _useState3 = (0, _react.useState)(false),
    _useState4 = _slicedToArray(_useState3, 2),
    isTouch = _useState4[0],
    setIsTouch = _useState4[1];
  var _useState5 = (0, _react.useState)(false),
    _useState6 = _slicedToArray(_useState5, 2),
    isZoomed = _useState6[0],
    setIsZoomed = _useState6[1];
  var _useState7 = (0, _react.useState)(false),
    _useState8 = _slicedToArray(_useState7, 2),
    isFullscreen = _useState8[0],
    setIsFullscreen = _useState8[1];
  var _useState9 = (0, _react.useState)(false),
    _useState10 = _slicedToArray(_useState9, 2),
    isDragging = _useState10[0],
    setIsDragging = _useState10[1];
  var _useState11 = (0, _react.useState)(false),
    _useState12 = _slicedToArray(_useState11, 2),
    isValidDrag = _useState12[0],
    setIsValidDrag = _useState12[1];
  var _useState13 = (0, _react.useState)(false),
    _useState14 = _slicedToArray(_useState13, 2),
    isFading = _useState14[0],
    setIsFading = _useState14[1];
  var _useState15 = (0, _react.useState)(moveType),
    _useState16 = _slicedToArray(_useState15, 2),
    currentMoveType = _useState16[0],
    setCurrentMoveType = _useState16[1];
  var _useState17 = (0, _react.useState)(0),
    _useState18 = _slicedToArray(_useState17, 2),
    left = _useState18[0],
    setLeft = _useState18[1];
  var _useState19 = (0, _react.useState)(0),
    _useState20 = _slicedToArray(_useState19, 2),
    top = _useState20[0],
    setTop = _useState20[1];
  var handleMouseEnter = function handleMouseEnter(e) {
    setIsActive(true);
    setIsFading(false);
    zoomType === 'hover' && !isZoomed && handleClick(e);
  };
  var handleTouchStart = function handleTouchStart() {
    setIsTouch(true);
    setIsFullscreen((0, _images.getFullscreenStatus)(fullscreenOnMobile, mobileBreakpoint));
    setCurrentMoveType('drag');
  };
  var handleClick = function handleClick(e) {
    if (isZoomed) {
      if (isTouch) {
        hideCloseButton && handleClose(e);
      } else {
        !isValidDrag && zoomOut();
      }
      return;
    }
    isTouch && setIsActive(true);
    if (zoomImg.current) {
      handleLoad({
        target: zoomImg.current
      });
      zoomIn(e);
    } else {
      imgProps.current.onLoadCallback = zoomIn.bind(_this, e);
    }
  };
  var handleLoad = function handleLoad(e) {
    var scaledDimensions = (0, _images.getScaledDimensions)(e.target, zoomScale);
    zoomImg.current = e.target;
    zoomImg.current.setAttribute('width', scaledDimensions.width);
    zoomImg.current.setAttribute('height', scaledDimensions.height);
    imgProps.current.scaledDimensions = scaledDimensions;
    imgProps.current.bounds = (0, _images.getBounds)(container.current, false);
    imgProps.current.ratios = (0, _images.getRatios)(imgProps.current.bounds, scaledDimensions);
    if (imgProps.current.onLoadCallback) {
      imgProps.current.onLoadCallback();
      imgProps.current.onLoadCallback = null;
    }
  };
  var handleMouseMove = function handleMouseMove(e) {
    var positions = (0, _events.getMouseMovePositions)(e, imgProps.current);
    setLeft(positions.left);
    setTop(positions.top);
  };
  var handleDragStart = function handleDragStart(e) {
    var coords = (0, _events.getEventCoords)(e);
    imgProps.current.offsets = (0, _images.getOffsets)(coords.x, coords.y, zoomImg.current.offsetLeft, zoomImg.current.offsetTop);
    setIsDragging(true);
    if (!isTouch) {
      imgProps.current.eventPosition = coords;
    }
  };
  var handleDragMove = (0, _react.useCallback)(function (e) {
    e.stopPropagation();
    var positions = (0, _events.getDragMovePositions)(e, imgProps.current);
    setLeft(positions.left);
    setTop(positions.top);
  }, []);
  var handleDragEnd = function handleDragEnd(e) {
    setIsDragging(false);
    if (!isTouch) {
      setIsValidDrag((0, _events.getIsValidDrag)(e, imgProps.current));
    }
  };
  var handleMouseLeave = function handleMouseLeave(e) {
    currentMoveType === 'drag' && isZoomed ? handleDragEnd(e) : handleClose(e);
  };
  var handleClose = function handleClose(e) {
    if (!(!isTouch && e.target.classList.contains('iiz__close'))) {
      if (!isZoomed || isFullscreen || !fadeDuration) {
        handleFadeOut({}, true);
      } else {
        setIsFading(true);
      }
    }
    zoomOut();
  };
  var handleFadeOut = function handleFadeOut(e, noTransition) {
    if (noTransition || e.propertyName === 'opacity' && container.current.contains(e.target)) {
      if (zoomPreload && isTouch || !zoomPreload) {
        zoomImg.current = null;
        imgProps.current = (0, _images.getImgPropsDefaults)();
        setIsActive(false);
      }
      setIsTouch(false);
      setIsFullscreen(false);
      setCurrentMoveType(moveType);
      setIsFading(false);
    }
  };
  var initialMove = function initialMove(e) {
    imgProps.current.offsets = (0, _images.getOffsets)(window.pageXOffset, window.pageYOffset, -imgProps.current.bounds.left, -imgProps.current.bounds.top);
    handleMouseMove(e);
  };
  var initialDrag = function initialDrag(e) {
    var initialDragCoords = (0, _events.getInitialDragCoords)(e, imgProps.current, isFullscreen);
    imgProps.current.bounds = (0, _images.getBounds)(container.current, isFullscreen);
    imgProps.current.offsets = (0, _images.getOffsets)(0, 0, 0, 0);
    handleDragMove(_objectSpread(_objectSpread({}, initialDragCoords), {}, {
      stopPropagation: function stopPropagation() {}
    }));
  };
  var zoomIn = function zoomIn(e) {
    setIsZoomed(true);
    currentMoveType === 'drag' ? initialDrag(e) : initialMove(e);
    afterZoomIn && afterZoomIn();
  };
  var zoomOut = function zoomOut() {
    setIsZoomed(false);
    afterZoomOut && afterZoomOut();
  };
  var zoomImageProps = {
    src: zoomSrc || src,
    fadeDuration: isFullscreen ? 0 : fadeDuration,
    top: top,
    left: left,
    isZoomed: isZoomed,
    onLoad: handleLoad,
    onDragStart: currentMoveType === 'drag' ? handleDragStart : null,
    onDragEnd: currentMoveType === 'drag' ? handleDragEnd : null,
    onClose: !hideCloseButton && currentMoveType === 'drag' ? handleClose : null,
    onFadeOut: isFading ? handleFadeOut : null
  };
  (0, _react.useEffect)(function () {
    imgProps.current = (0, _images.getImgPropsDefaults)();
  }, []);
  (0, _react.useEffect)(function () {
    (0, _images.getFullscreenStatus)(fullscreenOnMobile, mobileBreakpoint) && setIsActive(false);
  }, [fullscreenOnMobile, mobileBreakpoint]);
  (0, _react.useEffect)(function () {
    if (!zoomImg.current) {
      return;
    }
    var eventType = isTouch ? 'touchmove' : 'mousemove';
    if (isDragging) {
      zoomImg.current.addEventListener(eventType, handleDragMove, {
        passive: true
      });
    } else {
      zoomImg.current.removeEventListener(eventType, handleDragMove);
    }
  }, [isDragging, isTouch, handleDragMove]);
  (0, _react.useImperativeHandle)(ref, function () {
    return {
      container: container.current,
      portal: portal.current
    };
  });
  return /*#__PURE__*/_react.default.createElement("figure", {
    className: "iiz ".concat(currentMoveType === 'drag' ? 'iiz--drag' : '', " ").concat(className ? className : ''),
    style: {
      width: width
    },
    ref: container,
    onTouchStart: isZoomed ? null : handleTouchStart,
    onClick: handleClick,
    onMouseEnter: isTouch ? null : handleMouseEnter,
    onMouseMove: currentMoveType === 'drag' || !isZoomed ? null : handleMouseMove,
    onMouseLeave: isTouch ? null : handleMouseLeave
  }, /*#__PURE__*/_react.default.createElement(_Image.default, {
    src: src,
    sources: sources,
    width: width,
    height: height,
    hasSpacer: hasSpacer,
    imgAttributes: imgAttributes,
    fadeDuration: fadeDuration,
    isZoomed: isZoomed
  }), isActive && /*#__PURE__*/_react.default.createElement(_react.Fragment, null, isFullscreen ? /*#__PURE__*/_react.default.createElement(_FullscreenPortal.default, {
    ref: portal
  }, /*#__PURE__*/_react.default.createElement(_ZoomImage.default, zoomImageProps)) : /*#__PURE__*/_react.default.createElement(_ZoomImage.default, zoomImageProps)), !hideHint && !isZoomed && /*#__PURE__*/_react.default.createElement("span", {
    className: "iiz__btn iiz__hint"
  }));
});
InnerImageZoom.displayName = 'InnerImageZoom';
var _default = InnerImageZoom;
exports.default = _default;