@mornya/react-image-libs
Version:
The project of React.js Image library.
115 lines (114 loc) • 6.37 kB
JavaScript
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
import { jsx as _jsx, Fragment as _Fragment, jsxs as _jsxs } from "react/jsx-runtime";
import { useContext, useRef, useMemo, useCallback, useEffect } from 'react';
import classNames from 'classnames';
import { IntersectObserverContext } from './IntersectObserverContext';
import { usePrev, useLazyImage } from './hooks';
export var LazyImage = function (props) {
var _a, _b, _c;
var _d = (_a = props.style) !== null && _a !== void 0 ? _a : {}, borderRadius = _d.borderRadius, style = __rest(_d, ["borderRadius"]);
var IntersectObserver = useContext(IntersectObserverContext);
var imagePayload = useLazyImage(__assign(__assign({}, props), { url: props.url.replace(/^http:/, 'https:') }));
var imageObserverRef = useRef(null);
var imageRef = useRef(null);
var imageLoadingRef = useRef(null);
var isSubscribed = useRef(false);
var isClickable = useMemo(function () { return !!props.onClick; }, [props.onClick]);
var title = useMemo(function () { var _a; return (_a = props.title) !== null && _a !== void 0 ? _a : imagePayload.url; }, [props, imagePayload]);
var prevImagePayload = usePrev(imagePayload);
var onLoadedImage = useCallback(function () {
var _a;
if (imageRef.current) {
imageRef.current.style.opacity = '1';
}
if (imageLoadingRef.current) {
imageLoadingRef.current.style.display = 'none';
}
(_a = props.onLoaded) === null || _a === void 0 ? void 0 : _a.call(props, imagePayload);
}, [props, imagePayload]);
var onClickImage = useCallback(function (event) {
var _a;
event.preventDefault();
(_a = props.onClick) === null || _a === void 0 ? void 0 : _a.call(props, event);
}, [props]);
var renderImage = useCallback(function () {
var _a, _b, _c;
return (_jsx("img", { ref: imageRef, src: imagePayload.url, alt: title, width: imagePayload.width, height: imagePayload.height, className: "lazy-image-payload", style: {
width: (_a = props.width) !== null && _a !== void 0 ? _a : '100%',
height: (_b = props.height) !== null && _b !== void 0 ? _b : 'auto',
borderRadius: borderRadius,
objectFit: (_c = props.fit) !== null && _c !== void 0 ? _c : 'initial',
opacity: 0,
pointerEvents: isClickable ? undefined : 'none',
cursor: isClickable ? 'pointer' : undefined,
}, onLoad: onLoadedImage }));
}, [
imagePayload.url,
imagePayload.width,
imagePayload.height,
title,
borderRadius,
props.width,
props.height,
props.fit,
isClickable,
onLoadedImage,
]);
useEffect(function () {
var target = imageObserverRef.current;
if (target) {
if (!isSubscribed.current) {
isSubscribed.current = true;
IntersectObserver.subscribe(target, function () { return imagePayload.loadImage(); });
}
return function () {
if (isSubscribed.current && imagePayload.loadState === 'loaded') {
IntersectObserver.unsubscribe(target);
}
};
}
}, [IntersectObserver, imagePayload]);
useEffect(function () {
var _a, _b;
if (imagePayload.loadState !== (prevImagePayload === null || prevImagePayload === void 0 ? void 0 : prevImagePayload.loadState)) {
if (imagePayload.loadState === 'loaded') {
if (imageLoadingRef.current) {
imageLoadingRef.current.style.display = 'none';
}
(_a = props.onLoaded) === null || _a === void 0 ? void 0 : _a.call(props, imagePayload);
}
else if (imagePayload.loadState === 'error') {
(_b = props.onError) === null || _b === void 0 ? void 0 : _b.call(props, props.url);
}
}
}, [props, imagePayload, prevImagePayload]);
return (_jsx("span", { ref: imageObserverRef, title: isClickable ? title : undefined, tabIndex: (_b = props.tabIndex) !== null && _b !== void 0 ? _b : 0, className: classNames('lazy-image', imagePayload.loadState, props.className), style: __assign(__assign({ display: 'flex', justifyContent: 'center', flexBasis: 'fit-content', position: 'relative', width: '100%', height: 'auto', minHeight: '1px' }, style), { border: '0 !important' }), onMouseOver: props.onMouseOver, onMouseLeave: props.onMouseLeave, onFocus: props.onFocus, onBlur: props.onBlur, children: _jsxs("span", { className: "lazy-image-inner", style: {
display: 'inline-flex',
alignItems: 'center',
position: 'relative',
width: '100%',
height: '100%',
borderRadius: borderRadius,
}, children: [_jsx("span", { ref: imageLoadingRef, className: classNames('lazy-image-loading', { error: imagePayload.loadState === 'error' }), style: { position: 'absolute', top: 0, left: 0, right: 0, bottom: 0 }, children: imagePayload.loadState === 'error' ? props.error : (_c = props.loading) !== null && _c !== void 0 ? _c : props.beforeLoad }), imagePayload.loadState === 'loaded' && (_jsx(_Fragment, { children: isClickable ? (_jsx("button", { type: "button", "aria-label": title, style: { width: '100%', fontSize: 0 }, onClick: onClickImage, children: renderImage() })) : (renderImage()) }))] }) }));
};