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NumericInput.tsx
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NumericInput.tsx
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import React, {
forwardRef,
useImperativeHandle,
useRef,
useState,
memo,
} from "react"
import PropTypes from "prop-types"
import classNames from "classnames"
import Input, { IInputProps, IInputRef } from "../input"
import Icon from "../icon"
import "./style"
import { isLegal, stringToNumber, getDecimalNumber } from "./core"
const prefix = "adui-numeric-input"
export interface INumericInputProps
extends Omit<IInputProps, "defaultValue" | "onChange" | "value"> {
[key: string]: any
/**
* 默认的初始值 - 内部驱动
*/
defaultValue?: number | null
/**
* 设置最大值
*/
max?: number
/**
* 设置最小值
*/
min?: number
/**
* 值改变时的 handler
*/
onChange?: (value?: number) => void
/**
* 设置精度
*/
precision?: number
/**
* 设置增加的幅度
*/
step?: number
/**
* 值 - 外部控制
*/
value?: number | null
}
/**
* 数字输入框。
*/
const NumericInput: React.ForwardRefExoticComponent<
INumericInputProps & React.RefAttributes<any>
> = forwardRef(
(
{
className,
defaultValue,
disabled,
max,
min,
onBlur,
onChange,
onFocus,
onKeyDown,
precision: precisionProp,
step,
value: valueProp,
...otherProps
}: INumericInputProps,
ref
) => {
const precision =
precisionProp === undefined ? getDecimalNumber(step || 1) : precisionProp
const [value, setValue] = useState<number | string>(() => {
let valueState: React.ReactText | null | undefined =
valueProp !== null ? valueProp : defaultValue
if (typeof valueState !== "number") {
valueState = ""
}
return valueState
})
const [inputValue, setInputValue] = useState<string>(
typeof value === "number" ? value.toFixed(precision) : ""
)
const inputRef = useRef<IInputRef>(null)
// 相当于生命周期 getDerivedStateFromProps
if (valueProp !== null && value !== valueProp) {
setValue(typeof valueProp === "number" ? valueProp : "")
if (document.activeElement !== inputRef.current?.input) {
setInputValue(
typeof valueProp === "number" ? valueProp.toFixed(precision) : ""
)
}
}
useImperativeHandle(ref, () => ({
current: inputRef.current,
}))
const handleValueStepChange = (
type: "plus" | "minus",
stp: number,
inputVal?: string
) => {
// 将 inputVal 转成数字,如果是空字符串,则认为从 0 开始加减
const val = stringToNumber(inputVal)
const decimal = getDecimalNumber(stp)
if (type === "plus") {
return (val * 10 ** decimal + stp * 10 ** decimal) / 10 ** decimal
}
return (val * 10 ** decimal - stp * 10 ** decimal) / 10 ** decimal
}
const handleButtonClick = (type: "plus" | "minus") => {
let valueStepChanged = handleValueStepChange(type, step || 1, inputValue)
if (min !== undefined && valueStepChanged < min) {
valueStepChanged = min
} else if (max !== undefined && valueStepChanged > max) {
valueStepChanged = max
}
if (valueProp === null) {
setValue(valueStepChanged)
setInputValue(valueStepChanged.toFixed(precision))
}
if (onChange) {
onChange(valueStepChanged)
}
}
const handleInputChange = ({
target: { value: val },
}: React.ChangeEvent<HTMLInputElement>) => {
if (isLegal(step || 1, val, min, max)) {
if (valueProp === null) {
setValue(stringToNumber(val))
}
if (onChange) {
onChange(stringToNumber(val))
}
}
if (valueProp === null) {
setInputValue(val)
}
}
const handleInputBlur = (e: React.FocusEvent<HTMLInputElement>) => {
const {
target: { value: val },
} = e
if (typeof value !== "number") {
setInputValue("")
} else {
const valueFixed = value.toFixed(precision)
if (!isLegal(step || 1, val, min, max) || val !== valueFixed) {
setInputValue(valueFixed)
}
}
if (onBlur) {
onBlur(e)
}
}
const handleMouseDown = (type: "plus" | "minus") => {
handleButtonClick(type)
setTimeout(() => {
if (
inputRef.current &&
document.activeElement !== inputRef.current.input
) {
const { input } = inputRef.current
const end = input.value.length
input.setSelectionRange(end, end)
input.focus()
}
}, 100)
}
const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
const { key } = e
if (key === "ArrowUp") {
e.preventDefault()
e.stopPropagation()
handleButtonClick("plus")
}
if (key === "ArrowDown") {
e.preventDefault()
e.stopPropagation()
handleButtonClick("minus")
}
}
return (
<Input
className={classNames(className, `${prefix}`, {
[`${prefix}-disabled`]: disabled,
})}
cleaveOptions={{
numeral: true,
numeralDecimalScale: precision,
delimiter: "",
}}
disabled={disabled}
onChange={handleInputChange}
onBlur={handleInputBlur}
onKeyDown={handleKeyDown}
value={inputValue}
ref={inputRef}
rightElement={
<div className={`${prefix}-buttons`}>
<div
className={`${prefix}-button`}
onClick={() => handleMouseDown("plus")}
role="none"
>
<Icon icon="arrow-up" interactive={!disabled} size={12} />
</div>
<div
className={`${prefix}-button`}
onClick={() => handleMouseDown("minus")}
role="none"
>
<Icon icon="arrow-down" interactive={!disabled} size={12} />
</div>
</div>
}
{...otherProps}
/>
)
}
)
NumericInput.displayName = "NumericInput"
NumericInput.propTypes = {
/**
* 默认的初始值 - 内部驱动
*/
defaultValue: PropTypes.number,
/**
* 设置最大值
*/
max: PropTypes.number,
/**
* 设置最小值
*/
min: PropTypes.number,
/**
* 值改变时的 handler
*/
onChange: PropTypes.func,
/**
* 设置精度
*/
precision: PropTypes.number,
/**
* 增减的幅度
*/
step: PropTypes.number,
/**
* 值 - 外部控制
*/
value: PropTypes.number,
}
NumericInput.defaultProps = {
defaultValue: null,
max: undefined,
min: undefined,
onChange: () => {},
precision: undefined,
step: 1,
value: null,
}
const MemoNumericInput = memo(
NumericInput,
(
{ leftElement, rightElement, ...prevProps },
{
leftElement: leftElementNext,
rightElement: rightElementNext,
...nextProps
}
) => JSON.stringify(prevProps) === JSON.stringify(nextProps)
)
MemoNumericInput.displayName = "NumericInput"
export default MemoNumericInput