@antmjs/vantui
Version:
一套适用于Taro3及React的vantui组件库
246 lines • 9.91 kB
JavaScript
import _toConsumableArray from "@babel/runtime/helpers/toConsumableArray";
import _asyncToGenerator from "@babel/runtime/helpers/asyncToGenerator";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
import _slicedToArray from "@babel/runtime/helpers/slicedToArray";
import _regeneratorRuntime from "@babel/runtime/regenerator";
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; }
import { useState, useCallback, forwardRef, useImperativeHandle, useEffect, useRef, useMemo, useLayoutEffect } from 'react';
import { View, ScrollView } from '@tarojs/components';
import { nextTick } from '@tarojs/taro';
import { getRect, addUnit } from '../common/utils';
import { Icon } from '../icon';
import { get } from '../default-props';
import { getClosestIndex } from './utils';
import { jsx as _jsx } from "react/jsx-runtime";
import { jsxs as _jsxs } from "react/jsx-runtime";
var clsPrefix = 'van-virtual-half-list';
function VirtualList_(props, ref) {
var _useState = useState(get().VirtualList),
_useState2 = _slicedToArray(_useState, 1),
d = _useState2[0];
var _d$props = _objectSpread(_objectSpread({}, d), props),
className = _d$props.className,
height = _d$props.height,
style = _d$props.style,
footer = _d$props.footer,
dataSource = _d$props.dataSource,
_d$props$showCount = _d$props.showCount,
showCount = _d$props$showCount === void 0 ? 10 : _d$props$showCount,
_d$props$listClssName = _d$props.listClssName,
listClssName = _d$props$listClssName === void 0 ? '' : _d$props$listClssName,
ItemRender = _d$props.ItemRender,
_d$props$listStyle = _d$props.listStyle,
listStyle = _d$props$listStyle === void 0 ? {} : _d$props$listStyle,
renderBackToTop = _d$props.renderBackToTop,
backToTopCritical = _d$props.backToTopCritical,
backToTopSuccess = _d$props.backToTopSuccess;
var prevDataLength = useRef(0);
var _useState3 = useState(''),
_useState4 = _slicedToArray(_useState3, 2),
scrollIntoView = _useState4[0],
setScrollIntoView = _useState4[1];
var _useState5 = useState({}),
_useState6 = _slicedToArray(_useState5, 2),
rects = _useState6[0],
setRects = _useState6[1];
var _useState7 = useState({
head: 0,
tail: showCount,
nextHead: showCount,
NextTail: showCount * 2,
transformY: "translateY(0px)"
}),
_useState8 = _slicedToArray(_useState7, 2),
showConfig = _useState8[0],
setShowConfig = _useState8[1];
var updateRects = useCallback( /*#__PURE__*/_asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee() {
var head, nextHead, target, nextTarget, shouldUpdate, rect1, prev, rect2, _prev;
return _regeneratorRuntime.wrap(function _callee$(_context) {
while (1) switch (_context.prev = _context.next) {
case 0:
head = showConfig.head;
nextHead = showConfig.nextHead;
target = ".".concat(clsPrefix, "-box").concat(head);
nextTarget = ".".concat(clsPrefix, "-box").concat(nextHead);
if (process.env.TARO_ENV === 'weapp') {
target = ".".concat(clsPrefix, " >>> ").concat(target);
nextTarget = ".".concat(clsPrefix, " >>> ").concat(nextTarget);
}
shouldUpdate = false;
if (rects[head]) {
_context.next = 12;
break;
}
shouldUpdate = true;
_context.next = 10;
return getRect(null, target);
case 10:
rect1 = _context.sent;
if ("".concat(head) === '0') {
rects[head] = _objectSpread(_objectSpread({}, rect1), {}, {
top: 0
});
} else {
prev = rects[head - showCount];
rects[head] = _objectSpread(_objectSpread({}, rect1), {}, {
top: prev.height + prev.top
});
}
case 12:
if (rects[nextHead]) {
_context.next = 19;
break;
}
shouldUpdate = true;
_context.next = 16;
return getRect(null, nextTarget);
case 16:
rect2 = _context.sent;
_prev = rects[nextHead - showCount];
rects[nextHead] = _objectSpread(_objectSpread({}, rect2), {}, {
top: _prev.height + _prev.top
});
case 19:
if (shouldUpdate) setRects(_objectSpread({}, rects));
case 20:
case "end":
return _context.stop();
}
}, _callee);
})), [showCount, rects, showConfig]);
var handleScroll = useCallback(function (e) {
var scrollTop = Math.floor(e.detail.scrollTop);
updateRects();
nextTick(function () {
if (Object.keys(rects).length) {
var startIndex = getClosestIndex(rects, scrollTop);
setShowConfig({
head: startIndex,
tail: startIndex + showCount,
nextHead: startIndex + showCount,
NextTail: startIndex + showCount * 2,
transformY: "translateY(".concat(rects["".concat(startIndex)].top, "px)")
});
}
});
}, [showCount, rects, updateRects]);
var reset = useCallback(function () {
prevDataLength.current = 0;
setRects({});
setShowConfig({
head: 0,
tail: showCount,
nextHead: showCount,
NextTail: showCount * 2,
transformY: "translateY(0px)"
});
}, [showCount]);
var scrollToTop = useCallback(function () {
setShowConfig({
head: 0,
tail: showCount,
nextHead: showCount,
NextTail: showCount * 2,
transformY: "translateY(0px)"
});
setScrollIntoView('van-virtual-box-item0');
nextTick(function () {
setTimeout(function () {
setScrollIntoView('');
backToTopSuccess === null || backToTopSuccess === void 0 ? void 0 : backToTopSuccess();
}, 33.33);
});
}, [backToTopSuccess, showCount]);
useImperativeHandle(ref, function () {
return {
reset: reset,
backToTop: scrollToTop
};
});
useEffect(function () {
if (dataSource.length > prevDataLength.current) {
setTimeout(function () {
updateRects();
}, 66.66);
}
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [dataSource.length]);
useLayoutEffect(function () {
reset();
// eslint-disable-next-line react-hooks/exhaustive-deps
}, []);
var onTouch = useCallback(function (e) {
if (showConfig.head > 0) {
e.preventDefault();
e.stopPropagation();
}
}, [showConfig.head]);
var wrapperHeight = useMemo(function () {
var keys = Object.keys(rects);
if (keys.length) {
var maxIndex = Math.max.apply(Math, _toConsumableArray(keys.map(function (item) {
return Number(item);
})));
var lastRect = rects["".concat(maxIndex)];
return lastRect.height + lastRect.top;
} else return 0;
}, [rects]);
return /*#__PURE__*/_jsxs(ScrollView
// @ts-ignore
, {
catchMove: true,
className: "van-virtual-list ".concat(clsPrefix, " ").concat(className),
scrollY: true,
style: _objectSpread({
height: addUnit(height)
}, style),
onScroll: handleScroll,
scrollIntoView: scrollIntoView,
onTouchStart: onTouch,
onTouchMove: onTouch,
children: [/*#__PURE__*/_jsx(View, {
style: {
minHeight: wrapperHeight || 'auto'
},
children: /*#__PURE__*/_jsxs(View, {
style: {
transform: showConfig.transformY
},
children: [/*#__PURE__*/_jsx(View, {
className: "".concat(clsPrefix, "-box").concat(showConfig.head, " ").concat(listClssName),
style: listStyle,
children: dataSource.slice(showConfig.head, showConfig.tail).map(function (item, i) {
return /*#__PURE__*/_jsx(ItemRender, {
item: item,
index: showConfig.head + i,
id: "van-virtual-box-item".concat(i + showConfig.head)
}, "van-virtual-box-item".concat(i + showConfig.head));
})
}), /*#__PURE__*/_jsx(View, {
className: "".concat(clsPrefix, "-box").concat(showConfig.nextHead, " ").concat(listClssName),
style: listStyle,
children: dataSource.slice(showConfig.nextHead, showConfig.NextTail).map(function (item, i) {
return /*#__PURE__*/_jsx(ItemRender, {
item: item,
index: showConfig.nextHead + i,
id: "van-virtual-box-item".concat(i + showConfig.nextHead)
}, "van-virtual-box-next-item".concat(i + showConfig.nextHead));
})
})]
})
}), footer, /*#__PURE__*/_jsx(View, {
className: "van-virtual-backto-top-".concat(showConfig.head > (backToTopCritical || showCount * 2) ? 'show' : 'hidden'),
children: renderBackToTop || /*#__PURE__*/_jsx(View, {
className: "van-virtual-backto-top",
children: /*#__PURE__*/_jsx(Icon, {
name: "back-top",
size: "20px",
onClick: scrollToTop
})
})
})]
});
}
export var VirtualList = /*#__PURE__*/forwardRef(VirtualList_);
export default VirtualList;