mirror of
https://github.com/ant-design/ant-design.git
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ac5a06027e
This reverts commit ea8ed28209
.
125 lines
2.9 KiB
TypeScript
125 lines
2.9 KiB
TypeScript
import classNames from 'classnames';
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import * as React from 'react';
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export interface UnitNumberProps {
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prefixCls: string;
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value: string | number;
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offset?: number;
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current?: boolean;
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}
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function UnitNumber({ prefixCls, value, current, offset = 0 }: UnitNumberProps) {
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let style: React.CSSProperties | undefined;
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if (offset) {
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style = {
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position: 'absolute',
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top: `${offset}00%`,
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left: 0,
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};
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}
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return (
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<span
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style={style}
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className={classNames(`${prefixCls}-only-unit`, {
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current,
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})}
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>
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{value}
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</span>
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);
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}
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export interface SingleNumberProps {
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prefixCls: string;
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value: string;
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count: number;
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}
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function getOffset(start: number, end: number, unit: -1 | 1) {
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let index = start;
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let offset = 0;
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while ((index + 10) % 10 !== end) {
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index += unit;
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offset += unit;
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}
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return offset;
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}
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export default function SingleNumber(props: SingleNumberProps) {
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const { prefixCls, count: originCount, value: originValue } = props;
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const value = Number(originValue);
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const count = Math.abs(originCount);
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const [prevValue, setPrevValue] = React.useState(value);
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const [prevCount, setPrevCount] = React.useState(count);
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// ============================= Events =============================
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const onTransitionEnd = () => {
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setPrevValue(value);
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setPrevCount(count);
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};
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// Fallback if transition event not support
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React.useEffect(() => {
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const timeout = setTimeout(() => {
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onTransitionEnd();
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}, 1000);
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return () => {
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clearTimeout(timeout);
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};
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}, [value]);
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// ============================= Render =============================
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// Render unit list
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let unitNodes: React.ReactElement[];
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let offsetStyle: React.CSSProperties | undefined;
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if (prevValue === value || Number.isNaN(value) || Number.isNaN(prevValue)) {
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// Nothing to change
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unitNodes = [<UnitNumber {...props} key={value} current />];
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offsetStyle = {
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transition: 'none',
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};
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} else {
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unitNodes = [];
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// Fill basic number units
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const end = value + 10;
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const unitNumberList: number[] = [];
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for (let index = value; index <= end; index += 1) {
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unitNumberList.push(index);
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}
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// Fill with number unit nodes
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const prevIndex = unitNumberList.findIndex((n) => n % 10 === prevValue);
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unitNodes = unitNumberList.map((n, index) => {
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const singleUnit = n % 10;
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return (
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<UnitNumber
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{...props}
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key={n}
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value={singleUnit}
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offset={index - prevIndex}
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current={index === prevIndex}
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/>
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);
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});
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// Calculate container offset value
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const unit = prevCount < count ? 1 : -1;
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offsetStyle = {
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transform: `translateY(${-getOffset(prevValue, value, unit)}00%)`,
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};
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}
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return (
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<span className={`${prefixCls}-only`} style={offsetStyle} onTransitionEnd={onTransitionEnd}>
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{unitNodes}
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</span>
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);
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}
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