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import * as React from 'react';
import classNames from 'classnames';
import raf from 'rc-util/lib/raf';
import { ConfigContext } from '../../config-provider';
import Input from '../Input';
import type { InputProps, InputRef } from '../Input';
export interface OTPInputProps extends Omit<InputProps, 'onChange'> {
index: number;
onChange: (index: number, value: string) => void;
/** Tell parent to do active offset */
onActiveChange: (nextIndex: number) => void;
mask?: boolean | string;
}
const OTPInput = React.forwardRef<InputRef, OTPInputProps>((props, ref) => {
const { className, value, onChange, onActiveChange, index, mask, ...restProps } = props;
const { getPrefixCls } = React.useContext(ConfigContext);
const prefixCls = getPrefixCls('otp');
const maskValue = typeof mask === 'string' ? mask : value;
// ========================== Ref ===========================
const inputRef = React.useRef<InputRef>(null);
React.useImperativeHandle(ref, () => inputRef.current!);
// ========================= Input ==========================
const onInternalChange: React.ChangeEventHandler<HTMLInputElement> = (e) => {
onChange(index, e.target.value);
};
// ========================= Focus ==========================
const syncSelection = () => {
raf(() => {
const inputEle = inputRef.current?.input;
if (document.activeElement === inputEle && inputEle) {
inputEle.select();
}
});
};
// ======================== Keyboard ========================
const onInternalKeyDown: React.KeyboardEventHandler<HTMLInputElement> = (event) => {
const { key, ctrlKey, metaKey } = event;
if (key === 'ArrowLeft') {
onActiveChange(index - 1);
} else if (key === 'ArrowRight') {
onActiveChange(index + 1);
} else if (key === 'z' && (ctrlKey || metaKey)) {
event.preventDefault();
}
syncSelection();
};
const onInternalKeyUp: React.KeyboardEventHandler<HTMLInputElement> = (e) => {
if (e.key === 'Backspace' && !value) {
onActiveChange(index - 1);
}
syncSelection();
};
// ========================= Render =========================
return (
<span className={`${prefixCls}-input-wrapper`} role="presentation">
{/* mask value */}
{mask && value !== '' && value !== undefined && (
<span className={`${prefixCls}-mask-icon`} aria-hidden="true">
{maskValue}
</span>
)}
<Input
aria-label={`OTP Input ${index + 1}`}
type={mask === true ? 'password' : 'text'}
{...restProps}
ref={inputRef}
value={value}
onInput={onInternalChange}
onFocus={syncSelection}
onKeyDown={onInternalKeyDown}
onKeyUp={onInternalKeyUp}
onMouseDown={syncSelection}
onMouseUp={syncSelection}
className={classNames(className, {
[`${prefixCls}-mask-input`]: mask,
})}
/>
</span>
);
});
export default OTPInput;
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